/* ACURHYAL CSS tổng hợp - gộp từ FUSION_LANDING_PAGE_v3.zip */

/* =========================================================
 * FONT MANROPE — TỰ LƯU TRỮ (không phụ thuộc Google Fonts CDN)
 * File đặt tại: flatsome-child/assets/acurhyal/fonts/manrope-{weight}.woff2
 * Sau khi thêm khối này, BỎ dòng link fonts.googleapis.com trong
 * header-acurhyal.php (không cần nữa).
 * ========================================================= */
@font-face{font-family:'Manrope';font-style:normal;font-weight:200;font-display:swap;
  src:url('../../../assets/acurhyal/fonts/manrope-200.woff2') format('woff2')}
@font-face{font-family:'Manrope';font-style:normal;font-weight:300;font-display:swap;
  src:url('../../../assets/acurhyal/fonts/manrope-300.woff2') format('woff2')}
@font-face{font-family:'Manrope';font-style:normal;font-weight:400;font-display:swap;
  src:url('../../../assets/acurhyal/fonts/manrope-400.woff2') format('woff2')}
@font-face{font-family:'Manrope';font-style:normal;font-weight:500;font-display:swap;
  src:url('../../../assets/acurhyal/fonts/manrope-500.woff2') format('woff2')}
@font-face{font-family:'Manrope';font-style:normal;font-weight:600;font-display:swap;
  src:url('../../../assets/acurhyal/fonts/manrope-600.woff2') format('woff2')}
@font-face{font-family:'Manrope';font-style:normal;font-weight:700;font-display:swap;
  src:url('../../../assets/acurhyal/fonts/manrope-700.woff2') format('woff2')}
@font-face{font-family:'Manrope';font-style:normal;font-weight:800;font-display:swap;
  src:url('../../../assets/acurhyal/fonts/manrope-800.woff2') format('woff2')}

/* =========================================================
 * CHẶN XUNG ĐỘT VỚI CSS SITE CHÍNH (main.css)
 * Chỉ áp dụng trong phạm vi .acr-page (body class riêng của Acurhyal,
 * đã có sẵn từ acurhyal-setup.php) — không ảnh hưởng site chính.
 *
 * 1) main.css có rule toàn site: `strong, b { font-family: var(--font-family-sansation) }`
 *    → đè mất font Manrope/serif của Acurhyal ở bất kỳ chỗ nào dùng thẻ <b>/<strong>
 *    (vd: h2.rvx__h dùng <b> để nhấn chữ). Reset lại về kế thừa từ phần tử cha.
 *
 * 2) main.css có rule toàn site: `html section, body section { overflow:hidden }`
 *    → phá position:sticky của 2 section "pinned scroll" (needs/.natstory,
 *    difference/.pinmaster) vì overflow:hidden trên BẤT KỲ phần tử cha nào
 *    cũng vô hiệu hoá sticky của con bên trong. Reset lại overflow:visible
 *    CHỈ cho đúng 2 section này — không đụng overflow của section khác
 *    (nhiều chỗ khác trong thiết kế đang dựa vào overflow:hidden để clip
 *    phần trang trí, không nên gỡ tràn lan).
 * ========================================================= */
.acr-page b,
.acr-page strong {
    font-family: inherit;
    font-weight: 700;
}
.acr-page .natstory,
.acr-page .pinmaster {
    overflow: visible;
}

/* 3) Trang "Khám phá" (co-che, sonication, khac-biet-ha, dong-san-pham),
 *    "Sản phẩm" (stim, lift), "Phác đồ ứng dụng" và CPT Event/Livestream
 *    đều có nhiều section .sec-light liền kề không có "seam" ở giữa như
 *    trang chủ. Trang chủ đã tự sửa lỗi này qua home-light.css (nền phẳng
 *    thay vì mờ dần) nhưng chỉ áp theo ID riêng của trang chủ (#needs,
 *    #products...). Áp dụng cùng cách xử lý cho tất cả nhóm trang còn lại
 *    bằng class body. */
.acr-page-explore .sec-light,
.acr-page-product .sec-light,
.acr-page-application .sec-light,
.acr-page-event .sec-light,
.acr-page-livestream .sec-light {
    background: var(--paper) !important;
    color: var(--on-light);
}

/* ===== css/design-system/tokens.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Design Tokens
   Colors, type scale, spacing, radius, easing — single source of truth.
   ============================================================ */
:root{
  /* palette — cool ink → luminous silver */
  --ink:#080a0e;
  --ink-2:#0c0f15;
  --ink-3:#11151d;
  --silver:#e9ecf1;
  --silver-2:#dfe3ea;
  --silver-hi:#f6f8fb;

  --on-dark:#eef2f8;
  --on-dark-mut:#9aa4b4;
  --on-dark-faint:#7c8595;   /* strengthened for small-label contrast (was #5e6675) */
  --on-light:#171a20;
  --on-light-mut:#5b6473;
  --on-light-faint:#828a99;  /* strengthened for small-label contrast (was #9aa1ad) */

  --line-dark:rgba(207,219,240,.14);
  --line-light:rgba(20,28,45,.12);

  /* light / editorial surfaces (light-content revision) */
  --paper:#f8f9fb;        /* off-white page ground */
  --paper-2:#eef0f4;      /* soft grey band */
  --card:#ffffff;         /* card surface */
  --hair:rgba(20,28,45,.09);   /* soft grey divider */
  --hair-2:rgba(20,28,45,.16);

  --red:#cc1f3c;
  --red-soft:#e0566e;
  --signal:#cfe0f6;       /* cool atom blue-white */
  --signal-deep:#8fb4e6;

  /* type — SINGLE-font system: Manrope everywhere (light-content revision).
     Cormorant Garamond removed. --serif/--mono are legacy aliases kept so existing
     markup keeps resolving — they all point to Manrope now; hierarchy is created
     with weight, size, tracking and (rarely) italic, never a second family. */
  --font-primary:"Manrope",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-highlight:var(--font-primary);
  --sans:var(--font-primary);
  --serif:var(--font-primary);
  --mono:var(--font-primary);

  /* fluid scale (cinematic default) */
  --t-display:clamp(54px,8.5vw,130px);
  --t-xl:clamp(34px,5.2vw,76px);
  --t-lg:clamp(26px,3.4vw,46px);
  --t-md:clamp(20px,2vw,28px);
  --lede:clamp(16px,1.35vw,21px);

  --wrap:1280px;
  --wrap-wide:1480px;
  --pad:clamp(20px,5vw,84px);
  --sec-y:clamp(90px,12vh,180px);
  --r:18px;
  --r-lg:26px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --par:1;                /* parallax intensity multiplier (JS/dir) */
}

/* ===== css/design-system/base.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Base
   Reset, body defaults, ambient background, layout primitives (.wrap/.section),
   typography primitives, buttons/chips, reveal-on-scroll (.rv).
   Load order: tokens.css can load before or after — CSS vars resolve at
   compute time regardless of file order.
   ============================================================ */
/* ============================================================
   ACURHYAL · Microsite — foundation
   Cinematic dark↔silver KV system
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
h1,h2,h3,h4,h5,h6{text-wrap:balance}


/* PREMIUM direction — calmer, airier, restrained scale */
body[data-dir="premium"]{
  --t-display:clamp(48px,6.8vw,104px);
  --t-xl:clamp(32px,4.4vw,62px);
  --t-lg:clamp(24px,3vw,40px);
  --sec-y:clamp(100px,13vh,200px);
  --par:.5;
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
body{
  overflow-x:clip;
  font-family:var(--sans);
  background:var(--ink);
  color:var(--on-dark);
  font-weight:300;
  line-height:1.6;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
/* default link tone (users add links via editor later) */
.prose a,a.txtlink{color:var(--red);text-decoration:none;border-bottom:1px solid rgba(204,31,60,.35);transition:border-color .25s,color .25s}
.prose a:hover,a.txtlink:hover{color:#a3162f;border-color:var(--red)}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
::selection{background:var(--signal-deep);color:#04060a}

/* ---- ambient world background (fixed) ---- */
.world{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(120% 70% at 50% -8%, #1a212e 0%, #0c0f15 42%, var(--ink) 78%);
}
.grain{
  position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- shared layout ---- */
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad);width:100%}
.wrap--wide{max-width:var(--wrap-wide)}
.section{position:relative;padding-block:var(--sec-y)}

/* tone surfaces */
.sec-dark{background:transparent;color:var(--on-dark)}
.sec-light{
  background:var(--paper);
  color:var(--on-light);
}
.sec-paper2{background:var(--paper-2);color:var(--on-light)}
.sec-white{background:#fff;color:var(--on-light)}

/* ---- type primitives ---- */
.label{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11.5px;font-weight:500;
  letter-spacing:.32em;text-transform:uppercase;color:var(--on-dark-mut);
}
.sec-light .label{color:var(--on-light-mut)}
.label .dot{width:6px;height:6px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px rgba(204,31,60,.16);flex:none}
.label .ln{width:34px;height:1px;background:currentColor;opacity:.4}

.h-display{font-size:var(--t-display);font-weight:200;line-height:.96;letter-spacing:-.02em;text-wrap:balance}
.h-xl{font-size:var(--t-xl);font-weight:200;line-height:1.04;letter-spacing:-.015em;text-wrap:balance}
.h-lg{font-size:var(--t-lg);font-weight:300;line-height:1.1;letter-spacing:-.01em;text-wrap:balance}
/* legacy editorial-highlight class — now a Manrope weight/tracking emphasis, no 2nd family */
.serif{font-family:var(--sans);font-weight:600;font-style:normal;letter-spacing:-.01em}
.kw{color:var(--on-dark);font-weight:500}
.sec-light .kw{color:var(--on-light)}
.lede{font-size:var(--lede);font-weight:300;line-height:1.62;color:var(--on-dark-mut);max-width:54ch;text-wrap:pretty}
.sec-light .lede{color:var(--on-light-mut)}
.mono{font-family:var(--mono)}

/* ---- buttons ---- */
.btn{
  --bg:transparent;--fg:var(--on-dark);--bd:var(--line-dark);
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  font-family:var(--sans);font-weight:500;font-size:14.5px;letter-spacing:.01em;
  padding:15px 26px;border-radius:100px;color:var(--fg);
  background:var(--bg);border:1px solid var(--bd);
  transition:transform .4s var(--ease),background .35s,border-color .35s,color .35s,box-shadow .45s;
  white-space:nowrap;
}
.btn .ar{font-size:1.05em;transition:transform .4s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn:hover .ar{transform:translate(3px,-2px)}
.btn--solid{--bg:var(--silver-hi);--fg:#0a0d12;--bd:transparent;box-shadow:0 10px 40px -16px rgba(207,224,246,.5)}
.btn--solid:hover{box-shadow:0 16px 50px -16px rgba(207,224,246,.7)}
.btn--ghost{--bd:var(--line-dark);backdrop-filter:blur(6px)}
.btn--ghost:hover{--bd:rgba(207,219,240,.4);background:rgba(207,219,240,.05)}
.sec-light .btn{--fg:var(--on-light);--bd:var(--line-light)}
.sec-light .btn--solid{--bg:#10131a;--fg:#f4f6fa;--bd:transparent;box-shadow:0 12px 40px -18px rgba(16,19,26,.7)}
.sec-light .btn--ghost:hover{background:rgba(20,28,45,.04);--bd:rgba(20,28,45,.28)}
/* red primary must keep WHITE text even inside a light section (the .sec-light
   .btn rule above would otherwise force dark text on red → fails contrast) */
.sec-light .btn--red{--fg:#fff}
.btn--red{--bg:var(--red);--fg:#fff;--bd:transparent;box-shadow:0 10px 36px -14px rgba(204,31,60,.6)}
.btn--red:hover{--bg:#d93651;box-shadow:0 16px 46px -14px rgba(204,31,60,.7)}
.btn--lg{padding:18px 34px;font-size:15.5px}
.btn--sm{padding:11px 18px;font-size:13px}

/* chips */
.chip{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;
  padding:8px 14px;border-radius:100px;color:var(--on-dark-mut);
  border:1px solid var(--line-dark);background:rgba(12,16,22,.4);backdrop-filter:blur(8px);
}
.chip .d{width:5px;height:5px;border-radius:50%;background:var(--signal-deep);flex:none}
.chip--red{color:#f0c2cb;border-color:rgba(204,31,60,.4);background:rgba(204,31,60,.1)}
.chip--red .d{background:var(--red-soft)}
.sec-light .chip{color:var(--on-light-mut);border-color:var(--line-light);background:rgba(255,255,255,.5)}

/* parallax consumer — JS sets --py; element rules with their own transform override this */
[data-par]{transform:translate3d(0,var(--py,0),0);will-change:transform}

/* reveal-on-scroll primitive */
.rv{opacity:0;transform:translateY(26px);transition:opacity 1s var(--ease-out),transform 1.1s var(--ease-out)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1!important;transform:none!important}}

/* ===== css/design-system/components.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Components
   Nav bar, mega-menu, mobile drawer, consultation modal, scroll spine,
   tweaks panel.
   ============================================================ */
/* ============================================================
   ACURHYAL · UI chrome — drawer, modal, tweaks, sticky, footer, responsive
   ============================================================ */

/* ---------------- mobile drawer ---------------- */
.drawer{position:fixed;inset:0;z-index:55;background:rgba(7,9,13,.97);backdrop-filter:blur(14px);
  display:flex;flex-direction:column;justify-content:center;gap:6px;padding:90px var(--pad) 40px;
  transform:translateX(100%);transition:transform .5s var(--ease);visibility:hidden}
.drawer.open{transform:none;visibility:visible}
.drawer a{display:flex;align-items:center;gap:16px;font-size:22px;font-weight:300;color:var(--on-dark);
  padding:14px 0;border-bottom:1px solid var(--line-dark)}
.drawer a .x{font-family:var(--mono);font-size:12px;color:var(--red-soft);letter-spacing:.1em}

/* ---------------- drawer accordion ("Thư viện tài liệu / Nghiên cứu") ---------------- */
.drawer__group{border-bottom:1px solid var(--line-dark)}
.drawer__acc{display:flex;align-items:center;gap:16px;width:100%;font-size:22px;font-weight:300;color:var(--on-dark);padding:14px 0;text-align:left}
.drawer__acc .x{font-family:var(--mono);font-size:12px;color:var(--red-soft);letter-spacing:.1em}
.drawer__acc-ic{margin-left:auto;width:18px;height:18px;position:relative;flex:none}
.drawer__acc-ic::before,.drawer__acc-ic::after{content:"";position:absolute;background:currentColor;top:50%;left:50%;transform:translate(-50%,-50%)}
.drawer__acc-ic::before{width:12px;height:1.4px}
.drawer__acc-ic::after{width:1.4px;height:12px;transition:transform .3s var(--ease)}
.drawer__group.open .drawer__acc-ic::after{transform:translate(-50%,-50%) rotate(90deg)}
.drawer__sub{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.drawer__group.open .drawer__sub{max-height:480px}
.drawer__sub a{display:block;font-size:16px;font-weight:300;color:var(--on-dark-mut);padding:11px 0 11px 16px;border-top:1px solid var(--line-dark)}

.drawer__cta{display:flex;gap:12px;margin-top:26px}
.drawer__cta .btn{flex:1}
.burger.x span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger.x span:nth-child(2){opacity:0}
.burger.x span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------------- modal ---------------- */
.modal{position:fixed;inset:0;z-index:90;display:none;align-items:center;justify-content:center;padding:20px}
.modal.show{display:flex}
.modal__sc{position:absolute;inset:0;background:rgba(4,6,10,.7);backdrop-filter:blur(8px);animation:fade .3s}
.modal__card{position:relative;width:min(560px,100%);max-height:92vh;overflow:auto;
  background:linear-gradient(180deg,#12161e,#0c0f15);border:1px solid var(--line-dark);border-radius:var(--r-lg);
  padding:clamp(26px,4vw,42px);box-shadow:0 40px 120px -30px rgba(0,0,0,.8);animation:pop .45s var(--ease-out)}
.modal__x{position:absolute;top:18px;right:18px;width:38px;height:38px;border-radius:50%;
  border:1px solid var(--line-dark);color:var(--on-dark-mut);font-size:14px;transition:.3s}
.modal__x:hover{background:rgba(207,219,240,.08);color:var(--on-dark)}
.modal__card h3{font-family:var(--sans);font-style:normal;font-size:29px;font-weight:700;letter-spacing:-.02em;margin:14px 0 8px}
.modal__seg{display:flex;gap:6px;margin:22px 0 18px;padding:5px;background:rgba(8,10,14,.6);border:1px solid var(--line-dark);border-radius:100px}
.modal__seg button{flex:1;padding:9px;border-radius:100px;font-size:12.5px;color:var(--on-dark-mut);transition:.3s}
.modal__seg button.on{background:var(--silver-hi);color:#0a0d12;font-weight:500}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.fgroup{margin-bottom:14px;display:flex;flex-direction:column;gap:7px}
.fgroup label{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-mut)}
.fgroup .req{color:var(--red-soft)}
.fgroup input,.fgroup select,.fgroup textarea{font-family:var(--sans);font-size:14.5px;font-weight:300;color:var(--on-dark);
  background:rgba(8,10,14,.5);border:1px solid var(--line-dark);border-radius:12px;padding:13px 15px;transition:border-color .3s;width:100%}
.fgroup textarea{min-height:84px;resize:vertical}
.fgroup input:focus,.fgroup select:focus,.fgroup textarea:focus{outline:none;border-color:var(--signal-deep)}
.fgroup .msg{display:none;font-size:11.5px;color:var(--red-soft)}
.fgroup.bad input,.fgroup.bad select{border-color:var(--red)}
.fgroup.bad .msg{display:block}
.modal__card form>.btn{width:100%;margin-top:6px}
.modal__ok{text-align:center;padding:20px 0}

/* =========================================================
 * FORM WPFORMS TRONG MODAL — style khớp theo đúng ngôn ngữ .fgroup gốc
 * (markup thật do WPForms xuất ra khác hẳn bản demo tĩnh, nên cần override
 * riêng theo class của WPForms). Scope trong #consult để không ảnh hưởng
 * form WPForms khác trên site chính.
 * ========================================================= */
#consult .wpforms-container{margin:0}
#consult .wpforms-form{display:block}
#consult .wpforms-field{margin-bottom:14px;padding:0}
#consult .wpforms-field-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--on-dark-mut);font-weight:400;margin-bottom:7px;display:block}
#consult .wpforms-required-label{color:var(--red-soft)}
#consult .wpforms-field input[type=text],
#consult .wpforms-field input[type=tel],
#consult .wpforms-field input[type=email],
#consult .wpforms-field select,
#consult .wpforms-field textarea{font-family:var(--sans);font-size:14.5px;font-weight:300;color:var(--on-dark);
  background:rgba(8,10,14,.5);border:1px solid var(--line-dark)!important;border-radius:12px;padding:13px 15px;
  transition:border-color .3s;width:100%;height:auto}
#consult .wpforms-field textarea{min-height:84px;resize:vertical}
#consult .wpforms-field input:focus,
#consult .wpforms-field select:focus,
#consult .wpforms-field textarea:focus{outline:none;border-color:var(--signal-deep)!important;box-shadow:none}
#consult .wpforms-field-description{font-size:11.5px;color:var(--on-dark-faint);margin-top:5px}
#consult .wpforms-error{font-size:11.5px;color:var(--red-soft)!important;margin-top:5px}
#consult .wpforms-field-hidden{margin:0;padding:0}
#consult .wpforms-submit-container{margin-top:6px}
#consult .wpforms-submit{width:100%;padding:14px;border-radius:100px!important;background:var(--red)!important;color:#fff!important;
  font-family:var(--sans);font-size:15px;font-weight:500;border:none!important;cursor:pointer;transition:background .3s}
#consult .wpforms-submit:hover{background:var(--red-soft,#e04)!important}
/* WPForms confirmation message (thay .modal__ok cũ) — dùng chung style */
#consult .wpforms-confirmation-container-full{text-align:center;padding:20px 0;border:none;background:none;
  color:var(--on-dark)}
#consult .wpforms-confirmation-container-full h3{color:var(--on-dark);font-size:24px;font-weight:700;margin:10px 0 8px}
#consult .wpforms-confirmation-container-full p{color:var(--on-dark-mut)}
#consult .wpforms-confirmation-container-full .ico{width:64px;height:64px;border-radius:50%;display:flex;
  align-items:center;justify-content:center;margin:0 auto 18px;background:rgba(72,180,120,.14);
  border:1px solid rgba(72,180,120,.4);color:#5fd49a;font-size:26px}
.modal__ok .ico{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 18px;
  background:rgba(72,180,120,.14);border:1px solid rgba(72,180,120,.4);color:#5fd49a;font-size:26px}
.modal__ok h3{font-family:var(--sans);font-weight:700}

/* ---------------- tweaks ---------------- */
.tweaks{position:fixed;right:18px;bottom:18px;z-index:95;width:300px;
  background:rgba(12,15,21,.92);backdrop-filter:blur(18px);border:1px solid var(--line-dark);border-radius:18px;
  box-shadow:0 30px 90px -30px rgba(0,0,0,.8);overflow:hidden;transform-origin:bottom right;
  animation:pop .4s var(--ease-out)}
.tweaks[hidden]{display:none}
.tweaks__h{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line-dark)}
.tweaks__h b{font-family:var(--mono);font-size:11px;letter-spacing:.24em;color:var(--on-dark)}
.tweaks__h button{width:26px;height:26px;border-radius:50%;color:var(--on-dark-mut);font-size:12px}
.tweaks__h button:hover{background:rgba(207,219,240,.08);color:var(--on-dark)}
.tweaks__body{padding:16px;display:flex;flex-direction:column;gap:16px}
.tw{display:flex;flex-direction:column;gap:9px}
.tw>span{font-size:12.5px;color:var(--on-dark-mut)}
.seg{display:flex;gap:4px;padding:4px;background:rgba(8,10,14,.6);border:1px solid var(--line-dark);border-radius:100px}
.seg button{flex:1;padding:8px 6px;border-radius:100px;font-size:12px;color:var(--on-dark-mut);transition:.25s}
.seg button.on{background:var(--silver-hi);color:#0a0d12;font-weight:500}

/* ---------------- sticky CTA ---------------- */
.stick{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:50;display:flex;flex-direction:column;gap:8px}
.stick a{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--on-dark-mut);
  background:rgba(12,15,21,.7);backdrop-filter:blur(12px);border:1px solid var(--line-dark);border-radius:100px;
  padding:10px 16px 10px 12px;transition:.3s;cursor:pointer}
.stick a .ic{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(207,219,240,.08);font-size:11px}
.stick a:hover{color:var(--on-dark);border-color:rgba(207,219,240,.3);transform:translateX(-3px)}
.stick a.is-red{color:#f4c6cf;border-color:rgba(204,31,60,.4)}
.stick a.is-red .ic{background:rgba(204,31,60,.2)}
.stickbar{display:none}

/* ---------------- footer ---------------- */
.foot{background:#06080b;border-top:1px solid var(--line-dark);padding:clamp(50px,7vw,90px) 0 30px;position:relative}
.foot__top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}
.foot__brand p{color:var(--on-dark-mut);font-size:14px;max-width:34ch;margin:18px 0 24px;line-height:1.6}
.foot__stats{display:flex;gap:26px;flex-wrap:wrap}
.foot__stats div b{display:block;font-family:var(--sans);font-style:normal;font-weight:700;font-size:26px;letter-spacing:-.02em;color:var(--on-dark)}
.foot__stats div span{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-dark-faint)}
.foot__col h5{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--on-dark-faint);margin-bottom:16px}
.foot__col a{display:block;font-size:14px;color:var(--on-dark-mut);padding:6px 0;transition:color .3s}
.foot__col a:hover{color:var(--on-dark)}
.foot__bot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line-dark);
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--on-dark-faint)}
.foot__bot .reg{display:flex;gap:18px;flex-wrap:wrap}

@keyframes fade{from{opacity:0}}
@keyframes pop{from{opacity:0;transform:scale(.96) translateY(10px)}}

/* ---------------- responsive ---------------- */
@media(max-width:1360px){
  .nav__links{display:none}
  .burger{display:flex}
}
@media(max-width:1080px){
  .vigo{display:none}
  .stick{display:none}
}
@media(max-width:860px){
  .hero__grid{grid-template-columns:1fr;justify-items:center;text-align:center;gap:8px}
  .hero__left{justify-self:center;text-align:center;order:2;max-width:none}
  .hero__sub{margin-top:10px}
  .hero__stage{order:1;width:clamp(150px,40vw,220px)}
  .hero__right{justify-self:center;text-align:center;order:0;max-width:none}
  .hero__vignette{background:
    radial-gradient(120% 60% at 50% 18%, rgba(6,8,12,.5), transparent 50%),
    radial-gradient(120% 60% at 50% 82%, rgba(6,8,12,.85), transparent 55%)}
  .foot__top{grid-template-columns:1fr 1fr}
  .foot__brand{grid-column:1/-1}
  .frow{grid-template-columns:1fr}
  .tweaks{left:12px;right:12px;width:auto;bottom:12px}
  .stickbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:50;
    background:rgba(8,10,14,.92);backdrop-filter:blur(16px);border-top:1px solid var(--line-dark)}
  .stickbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px;font-size:10.5px;color:var(--on-dark-mut)}
  .stickbar a .ic{font-size:14px}
  .stickbar a.is-red{color:var(--red-soft)}
}
@media(max-width:560px){
  .foot__top{grid-template-columns:1fr}
  .hero__chips{gap:7px}
  .modal__seg{flex-wrap:wrap}
}

/* ===== css/design-system/sections.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Sections
   Skin-needs cards, clinical proof (feature cards / stat band / before-after
   sliders), STIM & LIFT product showcase, etc.
   ============================================================ */
/* ============================================================
   ACURHYAL · sections (part 1)
   shared primitives · seams · Difference · Precision
   ============================================================ */

/* ---- feathered light surface: top & bottom fade to transparent so the
   dark world shows through — NO hard rectangle collisions ---- */
.sec-light{
  background:linear-gradient(180deg,
    transparent 0,
    var(--silver-hi) 130px,
    var(--silver) 28%,
    var(--silver) 72%,
    var(--silver-2) calc(100% - 130px),
    transparent 100%);
}

/* ---- luminous seam (petal-signal connective tissue) ---- */
.seam{position:relative;height:0;z-index:5;pointer-events:none}
.seam__line{position:absolute;left:50%;top:0;transform:translateX(-50%);width:min(86%,var(--wrap));height:1px;
  background:linear-gradient(90deg,transparent,rgba(207,224,246,.32) 30%,rgba(207,224,246,.32) 70%,transparent)}
.seam__node{position:absolute;left:50%;top:0;transform:translate(-50%,-50%);width:46px;height:46px}
.seam__node svg{width:100%;height:100%;overflow:visible}
.seam__node ellipse{fill:none;stroke:rgba(207,224,246,.5);stroke-width:.5}
.seam__node .c{fill:#fff;filter:drop-shadow(0 0 6px rgba(207,224,246,.9))}
.sec-light+.seam .seam__line,.seam--light .seam__line{background:linear-gradient(90deg,transparent,rgba(20,28,45,.2) 30%,rgba(20,28,45,.2) 70%,transparent)}

/* ---- section heads ---- */
.head{display:flex;flex-direction:column;align-items:flex-start;gap:18px}
.head--c{align-items:center;text-align:center;margin-inline:auto;max-width:60ch}
.head--c2{align-items:center;text-align:center;margin-inline:auto;max-width:100ch}
.head-row{display:grid;grid-template-columns:1.25fr .9fr;gap:clamp(28px,5vw,72px);align-items:end}
.eyebrow{margin-bottom:2px}
.head .lede{margin-top:2px}
@media(max-width:820px){.head-row{grid-template-columns:1fr;align-items:start;gap:22px}}

/* equation chip */
.eq{display:inline-flex;flex-wrap:wrap;align-items:center;gap:12px;font-family:var(--serif);font-style:italic;
  font-size:clamp(19px,2vw,28px);color:var(--on-dark-mut)}
.eq .w{color:var(--on-dark)}
.eq .a{color:var(--signal)}
.eq .op{font-family:var(--sans);font-style:normal;font-weight:200;color:var(--on-dark-faint);font-size:.8em}
.sec-light .eq{color:var(--on-light-mut)}.sec-light .eq .w{color:var(--on-light)}
.sec-light .eq .a{color:var(--red)}

/* ============================================================
   DIFFERENCE — precise proof rail (dots aligned to line)
   ============================================================ */
.proof{position:relative;margin-top:clamp(46px,6vw,86px)}
.proof__rail{position:absolute;left:0;right:0;top:7px;height:1px;
  background:linear-gradient(90deg,rgba(207,224,246,.06),rgba(207,224,246,.3) 12%,rgba(207,224,246,.3) 88%,rgba(207,224,246,.06));
  transform:scaleX(var(--rail,1));transform-origin:left;transition:transform 1.4s var(--ease-out)}
.proof.in .proof__rail{--rail:1}
.proof__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,2.6vw,46px)}
.pt{position:relative;padding-top:42px}
.pt__node{position:absolute;left:0;top:0;width:15px;height:15px;border-radius:50%;
  background:radial-gradient(circle at 50% 42%,#fff,#9fc0ea 60%,transparent 72%);
  box-shadow:0 0 0 5px rgba(8,10,14,1),0 0 16px 2px rgba(159,192,234,.55)}
.pt__node::after{content:"";position:absolute;left:50%;top:14px;transform:translateX(-50%);width:1px;height:22px;
  background:linear-gradient(rgba(159,192,234,.5),transparent)}
.pt__v{font-family:var(--serif);font-style:italic;font-weight:500;font-size:clamp(40px,4.4vw,60px);line-height:1;color:#fff;letter-spacing:-.01em}
.pt__v sub{font-family:var(--mono);font-style:normal;font-size:.26em;letter-spacing:.06em;color:var(--on-dark-mut);vertical-align:baseline;margin-left:3px}
.pt h3{font-size:15.5px;font-weight:500;margin:14px 0 8px;color:var(--on-dark)}
.pt h3.sci{font-family:var(--mono);font-weight:500;font-size:13px;letter-spacing:.04em}
.pt p{font-size:13.5px;color:var(--on-dark-mut);line-height:1.6}
.pt--gold .pt__node{background:radial-gradient(circle at 50% 42%,#fff,#ffd98a 58%,transparent 72%);
  box-shadow:0 0 0 5px rgba(8,10,14,1),0 0 22px 3px rgba(255,200,120,.6)}
.pt--gold .pt__v{color:#ffe6b0}
@media(max-width:860px){
  .proof__rail{display:none}
  .proof__grid{grid-template-columns:1fr 1fr;gap:34px 26px}
}
@media(max-width:460px){.proof__grid{grid-template-columns:1fr}}

/* ============================================================
   PRECISION — 15.2 kDa scale + Sonication (merged, stable flow)
   ============================================================ */
.precision__intro{max-width:62ch;margin-top:18px}

/* molecular precision axis */
.scale{position:relative;margin-top:clamp(50px,7vw,96px)}
.scale__axis{position:relative;height:1px;margin:0 6%;
  background:linear-gradient(90deg,transparent,rgba(207,224,246,.25) 15%,rgba(255,214,140,.6) 50%,rgba(207,224,246,.25) 85%,transparent)}
.scale__ends{display:flex;justify-content:space-between;margin:0 6% 16px;
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-dark-faint)}
.scale__zones{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:clamp(16px,3vw,40px);margin-top:34px;align-items:start}
.mz{position:relative;text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px}
.mz__tick{position:absolute;top:-34px;left:50%;transform:translateX(-50%);width:1px;height:24px;background:linear-gradient(rgba(207,224,246,.4),transparent)}
.mz__mol{width:clamp(92px,11vw,128px);height:clamp(92px,11vw,128px);position:relative;margin-bottom:10px}
.mz__mol svg{width:100%;height:100%;overflow:visible}
.mz__mol circle{transition:.4s}
.mz__k{font-family:var(--serif);font-style:italic;font-size:clamp(22px,2.4vw,32px);color:var(--on-dark)}
.mz__tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--on-dark-faint)}
.mz p{font-size:13px;color:var(--on-dark-mut);line-height:1.55;max-width:30ch;margin-top:4px}
.mz--gold{padding:clamp(20px,2.4vw,30px) clamp(14px,2vw,24px) clamp(22px,2.4vw,28px);border-radius:var(--r-lg);
  background:radial-gradient(120% 120% at 50% 0%,rgba(255,214,140,.12),rgba(255,214,140,.02) 60%,transparent);
  border:1px solid rgba(255,214,140,.22);box-shadow:0 30px 80px -40px rgba(255,200,120,.4)}
.mz--gold .mz__mol{width:clamp(110px,13vw,150px);height:clamp(110px,13vw,150px)}
.mz--gold .mz__mol::after{content:"";position:absolute;inset:-20%;border-radius:50%;
  background:radial-gradient(circle,rgba(255,214,140,.3),transparent 64%);filter:blur(8px);z-index:-1;animation:pulse 4s ease-in-out infinite}
.mz--gold .mz__k{color:#ffe6b0;font-size:clamp(28px,3vw,42px)}
.mz--gold .mz__tag{color:#ffcf8a}
.mz__badge{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:#ffcf8a;border:1px solid rgba(255,214,140,.3);border-radius:100px;padding:5px 11px;margin-bottom:4px}
@media(max-width:760px){
  .scale__zones{grid-template-columns:1fr;gap:24px}
  .scale__axis,.scale__ends{display:none}
  .mz__tick{display:none}
  .mz--small{order:3}.mz--gold{order:1}.mz--big{order:2}
}

/* sonication block */
.sonic{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,6vw,80px);align-items:center;
  margin-top:clamp(60px,9vw,130px)}
.sonic__viz{position:relative;aspect-ratio:5/3;border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(180deg,#0d1118,#0a0d12);border:1px solid var(--line-dark);display:flex;align-items:center;justify-content:center}
.sonic__viz svg{width:84%;height:auto;overflow:visible}
.sonic__viz .wv{fill:none;stroke:var(--signal);stroke-width:1.4;stroke-linecap:round}
.sonic__cut{position:absolute;left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%);
  background:linear-gradient(transparent,rgba(255,214,140,.7),transparent)}
.sonic__cap{position:absolute;left:18px;right:18px;bottom:16px;font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  color:var(--on-dark-mut);text-align:center}
.sonic ul{list-style:none;margin-top:22px;display:flex;flex-direction:column;gap:16px}
.sonic li{display:flex;gap:14px;font-size:14.5px;color:var(--on-dark-mut);line-height:1.55}
.sonic li::before{content:"";flex:none;width:7px;height:7px;border-radius:50%;margin-top:8px;
  background:var(--signal-deep);box-shadow:0 0 10px rgba(143,180,230,.7)}
.sonic li b{color:var(--on-dark);font-weight:500}
@media(max-width:760px){.sonic{grid-template-columns:1fr;gap:30px}}

/* ============================================================
   MECHANISM — 3-pillar energy-flower (collision-free)
   ============================================================ */
.mech{display:grid;grid-template-columns:.95fr 1.05fr;gap:clamp(40px,6vw,90px);align-items:center;
  margin-top:clamp(46px,6vw,82px)}
.mech__stage{position:relative;aspect-ratio:1;max-width:520px;width:100%;margin-inline:auto;display:flex;align-items:center;justify-content:center}
.mech__svg{width:100%;height:100%;overflow:visible}
/* resonance rings — two concentric circles frame the whole system */
.mech__svg .orbit{fill:none;stroke:rgba(207,224,246,.22);stroke-width:.5}
.mech__svg .orbit--outer{stroke-dasharray:2 4;animation:dashflow 30s linear infinite}
.mech__svg .orbit--inner{stroke:rgba(207,224,246,.1)}
/* spokes — one clean line per pillar, from the core out to its node */
.mech__svg .spoke{stroke-width:.6}
.mech__svg .spoke--1{stroke:rgba(143,180,230,.55)}
.mech__svg .spoke--2{stroke:rgba(255,207,138,.55)}
.mech__svg .spoke--3{stroke:rgba(127,212,168,.55)}
/* petals — small tangent flares sitting exactly on the outer ring at each node */
.mech__svg .petal{fill:none;stroke-width:.9;opacity:.95}
.mech__svg .petal--1{stroke:#8fb4e6}
.mech__svg .petal--2{stroke:#ffcf8a}
.mech__svg .petal--3{stroke:#7fd4a8}
.mech__rot{transform-origin:50px 50px}
@keyframes dashflow{to{stroke-dashoffset:-120}}
@media(prefers-reduced-motion:reduce){.mech__svg .orbit--outer{animation:none}}
.mech__core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);text-align:center;width:38%}
.mech__core .o{width:54px;height:54px;border-radius:50%;margin:0 auto 12px;
  background:radial-gradient(circle at 50% 42%,#fff,#cfe0f6 55%,rgba(207,224,246,.1) 75%);
  box-shadow:0 0 40px 6px rgba(207,224,246,.5);animation:pulse 4.5s ease-in-out infinite}
.mech__core b{display:block;font-family:var(--serif);font-style:italic;font-size:clamp(17px,1.7vw,22px);color:#fff;line-height:1.1}
.mech__core span{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-mut);margin-top:8px}
.mech__tip{position:absolute;width:12px;height:12px;border-radius:50%;transform:translate(-50%,-50%)}
.mech__tip.t1{background:radial-gradient(circle,#fff,#8fb4e6 60%,transparent 72%);box-shadow:0 0 16px 2px rgba(143,180,230,.7)}
.mech__tip.t2{background:radial-gradient(circle,#fff,#ffcf8a 60%,transparent 72%);box-shadow:0 0 16px 2px rgba(255,207,138,.7)}
.mech__tip.t3{background:radial-gradient(circle,#fff,#7fd4a8 60%,transparent 72%);box-shadow:0 0 16px 2px rgba(127,212,168,.7)}

.mech__pillars{display:flex;flex-direction:column;gap:6px}
.pillar{position:relative;display:grid;grid-template-columns:auto 1fr;gap:18px;padding:20px 4px;border-bottom:1px solid var(--line-dark);transition:.4s}
.pillar:last-child{border-bottom:0}
.pillar__ix{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--pc,var(--signal-deep));padding-top:5px;
  display:flex;align-items:flex-start;gap:10px}
.pillar__ix::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--pc,var(--signal-deep));margin-top:4px;box-shadow:0 0 12px var(--pc,var(--signal-deep))}
.pillar h3{font-size:clamp(18px,1.8vw,23px);font-weight:300;color:var(--on-dark);margin-bottom:5px}
.pillar h3 .sci{font-family:var(--mono);font-weight:500;font-size:.7em;letter-spacing:.02em;color:var(--pc,var(--signal))}
.pillar p{font-size:13.5px;color:var(--on-dark-mut);line-height:1.55}
.pillar:hover{background:linear-gradient(90deg,rgba(207,224,246,.04),transparent)}
.pillar--1{--pc:#8fb4e6}.pillar--2{--pc:#ffcf8a}.pillar--3{--pc:#7fd4a8}
.mech__close{max-width:64ch;margin:clamp(40px,5vw,68px) auto 0;text-align:center}
@media(max-width:820px){
  .mech{grid-template-columns:1fr;gap:30px}
  .mech__stage{max-width:380px;order:-1}
}

/* ============================================================
   NEEDS — science → skin-need mapping (dark, immersive horizontal scroll)
   ============================================================ */
.needs-scroll{width:100%;margin-left:0;margin-top:clamp(38px,4.6vw,60px);
  overflow-x:auto;overflow-y:visible;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  scroll-padding-left:max(clamp(28px,6vw,84px),calc(50vw - var(--wrap)/2));
  scrollbar-width:none;padding-bottom:6px}
.needs-scroll::-webkit-scrollbar{display:none}
/* the full-bleed strip is width:100vw (which INCLUDES the vertical scrollbar),
   so clip its own section to stop it forcing a page-level horizontal scrollbar —
   scoped to the section, never html/body, so pinned sticky stories keep working. */
.section:has(.needs-scroll){overflow-x:clip}
.needs{display:flex;gap:clamp(16px,1.8vw,24px);padding:0 max(clamp(28px,6vw,84px),calc(50vw - var(--wrap)/2))}
.need{flex:0 0 clamp(300px,32vw,420px);scroll-snap-align:start;display:flex;flex-direction:column;
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--line-dark);border-radius:var(--r-lg);overflow:hidden;
  transition:transform .5s var(--ease),box-shadow .5s,border-color .5s}
.need:hover{transform:translateY(-6px);box-shadow:0 40px 80px -34px rgba(0,0,0,.6);border-color:rgba(207,219,240,.25)}
.need__img{position:relative;aspect-ratio:4/5;background-size:cover;background-position:center;overflow:hidden}
.need__img::before{content:"";position:absolute;inset:0;mix-blend-mode:multiply;opacity:.58;transition:opacity .5s}
.need__img.tint-stim::before{background:linear-gradient(160deg,#0a3a86,#2a6fdb 60%,#7fa8e8)}
.need__img.tint-lift::before{background:linear-gradient(160deg,#7a0f26,var(--red) 60%,#e0566e)}
.need:hover .need__img::before{opacity:.36}
.need__img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 44%,rgba(6,8,12,.94))}
.need__ix{position:absolute;top:16px;left:18px;z-index:2;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:#fff;text-shadow:0 1px 6px rgba(0,0,0,.5)}
.need__tag{position:absolute;top:15px;right:15px;z-index:2;font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;
  padding:5px 10px;border-radius:100px;background:rgba(10,13,18,.6);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.18);
  display:inline-flex;align-items:center;gap:6px;color:#fff}
.need__tag .d{width:5px;height:5px;border-radius:50%}
.need__tag.stim .d{background:#6ea6f0}
.need__tag.lift .d{background:var(--red-soft)}
.need__b{padding:0 22px 26px;margin-top:-40px;position:relative;z-index:2;display:flex;flex-direction:column;flex:1}
.need__b h3{font-size:19px;font-weight:500;color:#fff;letter-spacing:-.01em}
.need__b .vn{font-size:12.5px;color:var(--on-dark-mut);margin-bottom:14px}
.need__b ul{list-style:none;display:flex;flex-direction:column;gap:7px;margin-top:auto}
.need__b li{font-size:12.5px;color:var(--on-dark-mut);padding-left:14px;position:relative;line-height:1.45}
.need__b li::before{content:"";position:absolute;left:0;top:8px;width:4px;height:4px;border-radius:50%;background:var(--on-dark-faint)}
@media(max-width:680px){.need{flex:0 0 78vw}}

/* ============================================================
   PRODUCTS — two paths from one signal (fluid, dark)
   ============================================================ */
.split{position:relative;margin-top:clamp(40px,6vw,76px)}
.split__line{position:absolute;left:50%;top:-10px;bottom:30px;width:1px;transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(207,224,246,.5),rgba(207,224,246,.12) 30%,transparent);z-index:1}
.split__node{position:absolute;left:50%;top:-22px;transform:translateX(-50%);width:30px;height:30px;z-index:2}
.split__node svg{width:100%;height:100%;overflow:visible}
.prods{display:grid;grid-template-columns:1fr 1fr;gap:0}
.prod{position:relative;padding:clamp(26px,3vw,42px) clamp(20px,3vw,48px);display:flex;flex-direction:column;align-items:center;text-align:center}
.prod--stim{--ac:#6ea6f0;--acglow:rgba(110,166,240,.3)}
.prod--lift{--ac:var(--red-soft);--acglow:rgba(224,86,110,.28)}
.prod__glow{position:absolute;left:50%;top:24%;width:90%;height:60%;transform:translate(-50%,-50%);z-index:-1;
  background:radial-gradient(ellipse 50% 50% at 50% 50%,var(--acglow),transparent 68%);filter:blur(20px);opacity:.7}
.prod__role{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ac);margin-bottom:4px}
.prod h3{font-size:clamp(26px,3vw,40px);font-weight:200;color:#fff;letter-spacing:-.01em}
.prod h3 b{font-weight:600}
.prod__stage{position:relative;width:clamp(170px,17vw,220px);height:clamp(320px,34vw,440px);margin:20px auto 10px;display:flex;align-items:center;justify-content:center}
.prod__photo{width:100%;height:100%;object-fit:contain;object-position:center;
  filter:drop-shadow(0 30px 42px rgba(0,0,0,.6));transition:transform .6s var(--ease),filter .6s}
.prod:hover .prod__photo{transform:translateY(-6px) scale(1.02);filter:drop-shadow(0 40px 54px rgba(0,0,0,.68))}
.prod__photo2{width:100%;height:100%;object-fit:contain;object-position:center;transition:transform .6s var(--ease),filter .6s;z-index:2;}
.prod:hover .prod__photo2{transform:translateY(-6px) scale(1.02);filter:drop-shadow(0 20px 24px rgba(0, 0, 0, 0.411))}
.prod__rings{position:absolute;inset:-12% -30%;z-index:-1;opacity:.5}
.prod__rings svg{width:100%;height:100%;overflow:visible}
.prod__rings .ring{fill:none;stroke:var(--ac);stroke-width:.5;opacity:.4}
.prod__chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:10px 0 18px}
.prod__chips .chip{border-color:color-mix(in srgb,var(--ac) 40%,transparent);color:color-mix(in srgb,var(--ac) 75%,white)}
.prod__chips .chip .d{background:var(--ac)}
.prod__specs{width:100%;max-width:340px;display:flex;flex-direction:column;gap:0;margin-bottom:18px}
.prod__specs div{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:11px 2px;border-bottom:1px solid var(--line-dark);text-align:left}
.prod__specs dt{font-size:12.5px;color:var(--on-dark-mut)}
.prod__specs dd{font-family:var(--mono);font-size:12.5px;color:var(--on-dark)}
.prod__specs dd .num{color:var(--ac);font-weight:600}
.prod__desc{font-size:13.5px;color:var(--on-dark-mut);line-height:1.6;max-width:38ch;margin-bottom:20px}
.prod__cta{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.prod--stim .btn--solid{--bg:#dfeaff;--fg:#0a1f44}
.prod--lift .btn--solid{--bg:var(--red);--fg:#fff}
@media(max-width:760px){
  .prods{grid-template-columns:1fr;gap:30px}
  .split__line{display:none}.split__node{display:none}
  .prod{border-bottom:1px solid var(--line-dark);padding-bottom:40px}
  .prod--lift{border-bottom:0}
}

/* ============================================================
   CLINICAL — feature cards + photographic proof band + BA strip
   ============================================================ */
.clin__feats{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,2vw,24px);margin-top:clamp(34px,4vw,52px)}
/* MOBILE ONLY: cards were shrinking into 3 tiny columns — switch to full-width
   single-column stack with a bigger image so each card has real presence. */
@media(max-width:768px){
  .clin__feats{grid-template-columns:1fr;gap:20px;margin-top:32px}
  .cfeat__img{aspect-ratio:16/9}
}
.cfeat{background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));border:1px solid var(--line-dark);border-radius:var(--r-lg);overflow:hidden;
  transition:transform .5s var(--ease),box-shadow .5s,border-color .5s}
.cfeat:hover{transform:translateY(-6px);box-shadow:0 40px 80px -34px rgba(0,0,0,.6);border-color:rgba(207,219,240,.25)}
.cfeat__img{aspect-ratio:16/10;background-size:cover;background-position:center}
.cfeat__img--dark{background-color:#06080b;background-size:56%;background-repeat:no-repeat}
.cfeat h4{font-size:16px;font-weight:600;color:#fff;margin:18px 20px 6px}
.cfeat p{font-size:12.5px;color:var(--on-dark-mut);line-height:1.55;margin:0 20px 20px}

.clin__band{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:clamp(28px,3.4vw,44px);
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-dark);background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02))}
.clin__band-img{aspect-ratio:auto;min-height:380px;background:#0c0e13 url('../../../assets/acurhyal/images/section-clinical-vials-ledge.png') center/cover no-repeat}
.clin__band-b{padding:clamp(28px,3.4vw,44px)}
.clin__stats{display:flex;gap:clamp(20px,3vw,40px);margin-bottom:20px;flex-wrap:wrap}
.clin__stats b{display:block;font-family:var(--serif);font-style:italic;font-size:clamp(28px,3vw,38px);color:#fff;line-height:1}
.clin__stats b i{font-style:normal;font-size:.4em;font-family:var(--mono);margin-left:3px;color:var(--on-dark-mut)}
.clin__stats span{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--on-dark-faint);margin-top:6px}
.clin__band-b .profi__legend{margin-top:18px}
@media(max-width:820px){.clin__band{grid-template-columns:1fr}.clin__band-img{min-height:220px}}

.clin__ba-strip{margin-top:clamp(46px,5.4vw,72px);padding-top:clamp(30px,3.4vw,44px);border-top:1px solid var(--line-dark)}
.clin__ba-h{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.clin__ba-h h5{font-size:15px;font-weight:600;color:#fff}
.clin__ba-h span{font-family:var(--mono);font-size:11px;color:var(--on-dark-faint)}

.clin{display:none}
.clin__ba{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
@media(max-width:680px){.clin__ba{grid-template-columns:1fr 1fr}}
/* MOBILE ONLY: below 560px even 2 columns feels squeezed — go full-width
   single-column so each Before/After case reads clearly, image included. */
@media(max-width:560px){
  .clin__ba{grid-template-columns:1fr;gap:20px}
  .baslide{aspect-ratio:4/3.1}
}
.ba{display:flex;flex-direction:column;gap:0;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--line-dark);border-radius:14px;overflow:hidden;transition:transform .5s var(--ease),border-color .5s}
.ba:hover{transform:translateY(-5px);border-color:rgba(207,219,240,.24)}
/* before/after comparison slider — same clinical frame, "after" side shows the
   post-treatment enhancement; drag the divider to compare */
.baslide{position:relative;aspect-ratio:4/3;overflow:hidden;isolation:isolate;
  background:#0c0e13 var(--img) center/cover no-repeat;--pos:50%;touch-action:none}
.baslide__after{position:absolute;inset:0;background:var(--img-after,var(--img)) center/cover no-repeat;
  clip-path:inset(0 0 0 var(--pos))}
.baslide__hl{position:absolute;top:0;bottom:0;left:var(--pos);width:2px;background:rgba(255,255,255,.9);
  box-shadow:0 0 14px rgba(0,0,0,.55);transform:translateX(-1px);z-index:3;pointer-events:none}
.baslide__hl::after{content:"‹ ›";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.94);color:#0c0e13;
  font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center;letter-spacing:-1px;
  box-shadow:0 3px 12px rgba(0,0,0,.45)}
.baslide__rng{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize;z-index:4}
.lab{position:absolute;bottom:11px;z-index:2;font-family:var(--mono);font-size:9px;letter-spacing:.16em;
  padding:4px 9px;border-radius:100px;background:rgba(8,10,14,.62);backdrop-filter:blur(6px);
  border:1px solid rgba(255,255,255,.14);color:#fff;pointer-events:none}
.lab--b{left:11px}.lab--a{right:11px;color:#bfe0cf}
.ba__cap{padding:14px 16px 16px;display:flex;flex-direction:column;gap:3px;align-items:flex-start}
.ba__tag{display:inline-block;font-family:var(--mono);font-size:9px;letter-spacing:.14em;
  padding:3px 8px;border-radius:100px;background:rgba(255,255,255,.06);border:1px solid var(--line-dark);margin-bottom:3px}
.ba__tag.stim{color:#9fc2f4}.ba__tag.lift{color:var(--red-soft)}
.ba__cap h4{font-size:14px;font-weight:600;color:#fff}
.ba__cap p{font-size:12px;color:var(--on-dark-mut);line-height:1.45}

/* profilometry panel */
.profi{background:rgba(255,255,255,.55);border:1px solid var(--line-light);border-radius:var(--r-lg);padding:clamp(20px,2.4vw,30px)}
.profi__map{position:relative;aspect-ratio:4/3;border-radius:14px;overflow:hidden;margin:14px 0 16px;
  background:#0c1018}
.profi__map .heat{position:absolute;inset:0;mix-blend-mode:screen}
.profi__grad{position:absolute;inset:0;opacity:.9;
  background:
    radial-gradient(40% 50% at 32% 60%, rgba(40,120,255,.0), rgba(40,120,255,.55) 60%, transparent 75%),
    radial-gradient(34% 44% at 60% 40%, rgba(60,220,140,.55), transparent 70%),
    radial-gradient(30% 30% at 72% 70%, rgba(255,210,60,.45), transparent 72%)}
.profi__legend{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--on-dark-mut)}
.profi__bar{flex:1;height:7px;border-radius:4px;background:linear-gradient(90deg,#2878ff,#3cdc8c,#ffd23c,#ff5a4a)}
.profi h4{font-size:16px;font-weight:600;color:var(--on-light);margin-bottom:6px}
.profi p{font-size:12.5px;color:var(--on-light-mut);line-height:1.55}
.profi .tag-src{display:inline-block;font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;color:var(--on-light-faint);margin-top:12px}
.clin__src{font-family:var(--mono);font-size:10.5px;letter-spacing:.04em;color:var(--on-light-faint);margin-top:24px;line-height:1.6;max-width:90ch}
@media(max-width:760px){.clin{grid-template-columns:1fr}}

/* ============================================================
   TRAINING — CME / Livestream / resources (dark)
   ============================================================ */
.train{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,3vw,40px);margin-top:clamp(36px,4vw,56px)}
@media(max-width:820px){.train{grid-template-columns:1fr}}
.sched{background:rgba(12,16,22,.5);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:clamp(22px,2.6vw,32px);backdrop-filter:blur(8px)}
.sched__h{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.sched__h h4{font-size:19px;font-weight:400;color:var(--on-dark)}
.live-dot{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--red-soft)}
.live-dot i{width:7px;height:7px;border-radius:50%;background:var(--red);box-shadow:0 0 0 0 rgba(204,31,60,.6);animation:ping 1.8s ease-out infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(204,31,60,.6)}100%{box-shadow:0 0 0 9px rgba(204,31,60,0)}}
.ev{display:flex;gap:16px;padding:16px 0;border-top:1px solid var(--line-dark)}
.ev__d{font-family:var(--mono);font-size:12px;line-height:1.4;color:var(--ac,var(--signal-deep));flex:none;width:54px}
.ev__b h5{font-size:15px;font-weight:500;color:var(--on-dark);margin-bottom:3px}
.ev__b p{font-size:12.5px;color:var(--on-dark-mut)}
.lnk{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--on-dark-mut);transition:color .3s}
.lnk:hover{color:var(--on-dark)}.lnk .ar{color:var(--red-soft)}
.res-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:clamp(24px,3vw,40px)}
@media(max-width:680px){.res-strip{grid-template-columns:1fr}}
.res{display:flex;flex-direction:column;gap:8px;padding:22px;border:1px solid var(--line-dark);border-radius:var(--r);
  background:rgba(12,16,22,.4);transition:.4s}
.res:hover{border-color:rgba(207,219,240,.28);background:rgba(207,219,240,.04);transform:translateY(-4px)}
.res__type{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--red-soft)}
.res h4{font-size:16px;font-weight:500;color:var(--on-dark)}
.res p{font-size:12.5px;color:var(--on-dark-mut);line-height:1.5;flex:1}
.res .dl{font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:var(--signal);margin-top:4px}

/* ============================================================
   FINAL CTA (dark)
   ============================================================ */
.final{position:relative;padding-block:clamp(100px,16vh,200px);overflow:hidden;text-align:center}
.final__rings{position:absolute;left:50%;top:50%;width:min(150vw,1100px);aspect-ratio:1;transform:translate(-50%,-50%);z-index:-1;opacity:.4}
.final__rings svg{width:100%;height:100%;overflow:visible}
.final__rings .ring{fill:none;stroke:rgba(207,224,246,.2);stroke-width:.4}
.final__glow{position:absolute;left:50%;top:46%;width:60%;height:60%;transform:translate(-50%,-50%);z-index:-1;
  background:radial-gradient(circle,rgba(160,190,240,.22),transparent 62%);filter:blur(30px);animation:pulse 6s ease-in-out infinite}
.final__in{max-width:760px;margin-inline:auto}
.final .display{font-size:var(--t-display);font-weight:200;line-height:.98;letter-spacing:-.02em;color:#fff;margin:18px 0 30px;text-wrap:balance}
.final__cta{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.final__paths{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:clamp(40px,5vw,64px);text-align:left}
@media(max-width:680px){.final__paths{grid-template-columns:1fr}}
.path{border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:clamp(22px,2.6vw,30px);background:rgba(12,16,22,.4)}
.path h4{font-size:19px;font-weight:400;color:var(--on-dark);margin:12px 0 14px}
.path ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.path li{display:flex;gap:10px;font-size:13.5px;color:var(--on-dark-mut)}
.path li .ar{color:var(--red-soft);flex:none}
.final__note{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--on-dark-faint);margin-top:30px}

/* ===== css/design-system/hero.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Hero + Reveal
   NOTE: retains legacy KV-image hero-motion CSS (.hero__bg/.hero__atom/
   .hero__vial/.hero__kv) for compatibility with earlier microsite versions
   (v2). The current video-hero DOM (index.html) does not render those
   elements, so these rules are inert here — flagged as a future cleanup
   candidate in docs/CLEANUP_REPORT.md rather than deleted outright.
   ============================================================ */
/* ============================================================
   ACURHYAL v2 · premium nav + KV-faithful hero + storytelling
   Loads AFTER acu.css. Overrides/extends the foundation.
   ============================================================ */

/* ---------------------------------------------------------- NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .5s,backdrop-filter .5s,border-color .5s}
.nav::after{content:"";position:absolute;inset:0;border-bottom:1px solid transparent;transition:border-color .5s;pointer-events:none}
.nav.scrolled{background:rgba(8,10,14,.66);backdrop-filter:blur(20px) saturate(1.25)}
.nav.scrolled::after{border-color:var(--line-dark)}
.nav.on-light.scrolled{background:rgba(245,247,250,.8)}
.nav.on-light.scrolled::after{border-color:var(--line-light)}
.nav__in{max-width:var(--wrap-wide);margin-inline:auto;padding:16px var(--pad);display:flex;align-items:center;justify-content:space-between;gap:24px}

.brand{display:flex;align-items:center;gap:14px;flex:none}
.brand__mk{font-weight:600;font-size:15px;letter-spacing:.16em;color:var(--on-dark)}
.brand__mk small{display:block;font-size:8.5px;letter-spacing:.42em;font-weight:400;color:var(--on-dark-mut);margin-top:1px}
.brand__sep{width:1px;height:26px;background:var(--line-dark)}
.brand__name{font-family:var(--sans);font-style:normal;font-size:20px;font-weight:600;letter-spacing:.005em;color:var(--on-dark)}
.brand__name sup{font-size:.5em;font-style:normal}
.nav.on-light .brand__mk,.nav.on-light .brand__name{color:var(--on-light)}
.nav.on-light .brand__mk small{color:var(--on-light-mut)}
.nav.on-light .brand__sep{background:var(--line-light)}

/* primary links */
.nav__links{display:flex;align-items:center;gap:0}
.nav__links>a,.nav__trigger{
  font-family:var(--sans);font-size:12.5px;font-weight:400;color:var(--on-dark-mut);
  padding:9px 12px;border-radius:100px;transition:color .3s,background .3s;
  position:relative;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;cursor:pointer;
}
.nav__links>a:hover,.nav__links>a.active,.nav__trigger:hover,.nav__trigger[aria-expanded="true"]{color:var(--on-dark);background:rgba(207,219,240,.07)}
.nav.on-light .nav__links>a,.nav.on-light .nav__trigger{color:var(--on-light-mut)}
.nav.on-light .nav__links>a:hover,.nav.on-light .nav__links>a.active,.nav.on-light .nav__trigger:hover{color:var(--on-light);background:rgba(20,28,45,.05)}
.nav__trigger .caret{width:7px;height:7px;border-right:1.4px solid currentColor;border-bottom:1.4px solid currentColor;transform:rotate(45deg) translate(-1px,-1px);transition:transform .3s;opacity:.7}
.nav__trigger[aria-expanded="true"] .caret{transform:rotate(-135deg) translate(-1px,-1px)}

.nav__right{display:flex;align-items:center;gap:18px;flex:none}
.vigo{text-align:right;line-height:1.15}
.vigo b{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--on-dark)}
.vigo span{display:block;font-family:var(--mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--on-dark-faint)}
.nav.on-light .vigo b{color:var(--on-light)}
.nav.on-light .vigo span{color:var(--on-light-faint)}
/* Vigo IMAGE logo (shared) — used on v5 + all child pages. Scoped with :has so
   the legacy text .vigo (index.html) keeps its original stacked layout. */
.vigo:has(.vigo__logo){display:flex;align-items:center;gap:10px;text-align:left}
.vigo__lbl{font-family:var(--mono);font-size:9px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--on-dark-faint);white-space:nowrap}
.vigo__logo{height:28px;width:auto;object-fit:contain;display:block}
.vigo__logo--dark{display:none}
.nav.on-light .vigo__logo--light{display:none}
.nav.on-light .vigo__logo--dark{display:block}
.nav.on-light .vigo__lbl{color:var(--on-light-faint)}
/* hide the Vigo lockup on mobile so the burger never gets pushed off-screen
   (the :has rule above has no media query and was overriding the old hide) */
@media(max-width:1080px){.vigo,.vigo:has(.vigo__logo){display:none}}
.foot__vigo{display:flex;align-items:center;gap:11px;margin:16px 0 4px}
.foot__vigo span{font-family:var(--mono);font-size:9.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--on-dark-faint)}
.foot__vigo img{height:34px;width:auto;object-fit:contain;display:block}
.burger{display:none;flex-direction:column;gap:5px;padding:8px;width:42px;height:42px;align-items:center;justify-content:center}
.burger span{width:20px;height:1.5px;background:var(--on-dark);transition:.3s}
.nav.on-light .burger span{background:var(--on-light)}

/* ---- nav dropdown ("Thư viện tài liệu / Nghiên cứu") — premium, minimal ---- */
.navdd{position:relative}
.navdd__panel{
  position:absolute;top:calc(100% + 10px);left:0;transform:translateY(-8px);
  min-width:280px;background:rgba(11,14,20,.96);backdrop-filter:blur(26px) saturate(1.2);
  border:1px solid var(--line-dark);border-radius:var(--r-lg);
  box-shadow:0 40px 110px -30px rgba(0,0,0,.85);padding:10px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;
}
.navdd.open .navdd__panel{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.navdd__panel a{display:block;padding:12px 14px;border-radius:11px;font-size:13.5px;font-weight:400;color:var(--on-dark-mut);transition:.25s}
.navdd__panel a:hover,.navdd__panel a:focus-visible{background:rgba(207,219,240,.08);color:var(--on-dark);outline:none}
.nav.on-light .navdd__panel{background:rgba(250,251,253,.97);border-color:var(--line-light)}
.nav.on-light .navdd__panel a{color:var(--on-light-mut)}
.nav.on-light .navdd__panel a:hover{background:rgba(20,28,45,.05);color:var(--on-light)}

/* ---- responsive nav (overrides old rules; new base loads later) ---- */
@media(max-width:1360px){
  .nav__links{display:none}
  .burger{display:flex}
  .brand__logo{height:40px!important}
}

/* ---------------------------------------------------------- HERO (faithful KV, full-bleed) */
.hero{position:relative;min-height:100svh;overflow:hidden;isolation:isolate;background:#06080b}

/* Single rigid stage holding bg + atom + core + vial. They ALWAYS move as one
   unit (shared transform applied in JS) so the product can never drift out
   of alignment with the atom — no independent per-layer transforms. */
.hero__kv{position:absolute;inset:0;transform-origin:50% 50%;will-change:transform}

/* layer 1 — KV background WITHOUT atom or vial */
.hero__bg{position:absolute;inset:0;z-index:-4;
  background:#06080b url("../../../assets/acurhyal/images/kv-hero-background-legacy.png") center/cover no-repeat;transform:scale(1.05)}

/* layer 2 — separated atom, screen blend drops the black; perfectly aligned to bg.
   Motion direction: gentle breathing (opacity + scale) only — no rotation,
   no orbit. A spinning atom read as dizzying; a slow pulse reads as "alive". */
.hero__atom{position:absolute;inset:0;z-index:-3;pointer-events:none;
  background:url("../../../assets/acurhyal/images/kv-atom-motif-legacy.png") center/cover no-repeat;
  mix-blend-mode:screen;transform-origin:50% 50%;will-change:opacity;
  animation:atombreathe 7s ease-in-out infinite}
/* gentle living core: a soft luminous pulse exactly over the atom centre */
.hero__core{position:absolute;left:50%;top:50%;z-index:-2;width:min(16vw,190px);aspect-ratio:1;
  transform:translate(-50%,-50%);pointer-events:none;mix-blend-mode:screen;
  background:radial-gradient(circle,rgba(255,255,255,.4),rgba(180,205,245,.1) 40%,transparent 66%);
  animation:acorepulse 6s ease-in-out infinite}

/* layer 3 — THE PRODUCT: the real Acurhyal vial exactly as authored in the KV
   layer stack (same canvas, same scale, same position) — large, sharp, fully
   luminous and NEVER dimmed by a scrim. It shares the stage's single transform
   with the atom, so it always reads as perfectly centred within the rings. */
.hero__vial{position:absolute;inset:0;z-index:0;pointer-events:none;
  background:url("../../../assets/acurhyal/images/kv-hero-vial-legacy.png") center/cover no-repeat}
.hero__vial-m{display:none}

/* readability — NO dark mass over the KV. Copy lives only in the naturally
   dark top/bottom bands of the source photo; the bright atom/vial band stays
   completely clear. Legibility comes from tight per-glyph text-shadow. */

/* top band — brand lockup, sits in the dark dotted vignette above the atom */
.hero__top{position:absolute;left:50%;top:clamp(96px,13vh,150px);transform:translateX(-50%);z-index:2;
  display:flex;flex-direction:column;align-items:center;text-align:center}
.hero__top_left{position:absolute;left:28vw;top:clamp(96px,13vh,150px);transform:translateX(-50%);z-index:2;
  display:flex;flex-direction:column;align-items:left;text-align:left;}
.hero__eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);
  font-size:10.5px;letter-spacing:.3em;text-transform:uppercase;color:var(--signal);margin-bottom:12px;
  text-shadow:0 1px 3px rgba(0,0,0,.9),0 0 18px rgba(0,0,0,.7)}
.hero__eyebrow .ln{width:22px;height:1px;background:linear-gradient(90deg,transparent,var(--signal))}
.hero__wm{font-family:var(--serif);font-weight:500;font-style:normal;
  font-size:clamp(30px,min(5vw,6.4vh),58px);line-height:.96;letter-spacing:-.015em;color:#fff;
  text-shadow:0 1px 2px rgba(0,0,0,.95),0 2px 10px rgba(0,0,0,.85),0 0 34px rgba(0,0,0,.6)}
.hero__wm_update{font-family:var(--serif);font-weight:500;font-style:normal;
font-size:clamp(50px, 7.4vw, 92px);;line-height:.96;letter-spacing:-.015em;color:#fff;
text-shadow:0 1px 1px rgba(0, 0, 0, 0.24),0 1px 5px rgba(0, 0, 0, 0.438),0 0 5px rgba(0, 0, 0, 0.137)}
.hero__wm sup{font-size:.3em;vertical-align:super;font-weight:400}
.hero__tagline{font-family:var(--mono);font-size:clamp(12px,1.1vw,16px);letter-spacing:.2em;text-transform:uppercase;
  color:#fff;margin-top:10px;text-shadow:0 1px 1px rgba(0,0,0,.95),0 0 14px rgba(0,0,0,.75)}

/* mid band — USP spec-sheet callouts, thin leader line + tight pill only
   (never a block), pinned to the same normalized coordinate space as the
   bg/atom/vial layers so they stay visually anchored to the bottle */
.hero__annos{position:absolute;inset:0;z-index:2;pointer-events:none}
.anno{position:absolute;display:flex;align-items:center;gap:0;opacity:.96}
.anno__pill{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;white-space:nowrap;color:#fff;
  background:rgba(6,8,12,.56);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.14);
  padding:7px 13px;border-radius:100px}
.anno__ln{height:1px;background:linear-gradient(90deg,rgba(255,255,255,.5),transparent)}
.anno--l1{left:6%;top:26%}.anno--l1 .anno__ln{width:clamp(30px,7vw,90px);order:2}.anno--l1 .anno__pill{order:1}
.anno--l2{left:6%;top:52%}.anno--l2 .anno__ln{width:clamp(30px,7vw,90px);order:2}.anno--l2 .anno__pill{order:1}
.anno--r1{right:6%;top:39%;flex-direction:row-reverse}
.anno--r1 .anno__ln{width:clamp(30px,7vw,90px);background:linear-gradient(270deg,rgba(255,255,255,.5),transparent)}

/* bottom band — a single CTA + scroll-cue only, well clear of the vial base.
   The full headline/value-prop lives in #reveal, immediately below, never on
   top of the KV. */
.hero__bottom{position:absolute;left:50%;bottom:clamp(28px,7vh,64px);transform:translateX(-50%);
  z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center;gap:clamp(14px,2.4vh,22px);width:100%;max-width:var(--wrap);padding:0 var(--pad)}
.hero__cta{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:2px}
.hero__chips{display:flex;flex-wrap:wrap;justify-content:center;gap:9px}
.hero__chips .chip{background:rgba(8,11,16,.62);backdrop-filter:blur(10px)}

.scrollcue{display:flex;flex-direction:column;align-items:center;gap:9px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.3em;text-transform:uppercase;color:var(--on-dark-faint)}
.scrollcue .ln{width:1px;height:38px;background:linear-gradient(var(--on-dark-faint),transparent);position:relative;overflow:hidden}
.scrollcue .ln::after{content:"";position:absolute;top:-38px;left:0;width:100%;height:38px;background:linear-gradient(var(--signal),transparent);animation:cue 2.4s var(--ease) infinite}

/* hero entrance */
[data-enter]{opacity:0;transform:translateY(26px)}
.lit [data-enter]{animation:rise 1.25s var(--ease-out) forwards;animation-delay:var(--d,0s)}
.hero__wm[data-enter]{transform:translateY(34px) scale(.985)}
@media(prefers-reduced-motion:reduce){[data-enter]{opacity:1!important;transform:none!important;animation:none!important}}

@keyframes acorepulse{0%,100%{opacity:.55;transform:translate(-50%,-50%) scale(1)}50%{opacity:.95;transform:translate(-50%,-50%) scale(1.1)}}
@keyframes atombreathe{0%,100%{opacity:.94;transform:scale(1)}50%{opacity:1;transform:scale(1.018)}}
@keyframes vialfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-.8%)}}
@keyframes rise{to{opacity:1;transform:none}}
@keyframes cue{0%{top:-38px}60%,100%{top:38px}}
@media(prefers-reduced-motion:reduce){.hero__vial-m{animation:none}.hero__atom{animation:none}}

@media(max-width:880px),(max-height:800px){
  .hero{display:flex;flex-direction:column;align-items:center;text-align:center;
    padding:clamp(64px,9vh,104px) var(--pad) clamp(28px,6vh,64px);gap:clamp(18px,4vh,36px);
    min-height:100svh;height:auto}
  .hero__top{position:relative;left:auto;top:auto;transform:none;order:1}
  .hero__top_left{position:relative;left:auto;top:auto;transform:none;order:1;text-align: center;}
  .hero__tagline{margin-top:-8px}
  .hero__annos{display:none}
  .hero__bottom{position:relative;bottom:auto;left:auto;transform:none;gap:clamp(8px,1.6vh,16px);order:3}

  /* full-bleed vial layer crops badly on tall/narrow or short viewports — swap for a
     dedicated centred cutout that keeps the whole bottle (cap to base) visible */
  .hero__vial{display:none}
  .hero__vial-m{display:block;position:relative;left:auto;top:auto;z-index:0;pointer-events:none;
    width:clamp(120px,26vh,210px);margin:0 auto;transform:none;order:2;
    filter:drop-shadow(0 20px 38px rgba(0,0,0,.55));animation:vialfloat 9s ease-in-out infinite}
  .hero__vial-m img{display:block;width:100%;height:auto}
}

@media(max-width:680px){
  .hero__bg{background-position:50% 30%}
}

/* ---------------------------------------------------------- HERO REVEAL (off-KV) */
/* Plain dark section directly below the hero — carries the full headline,
   supporting line, CTAs and trust chip on a flat ground. Text here can never
   collide with the product because there IS no product/KV layer in this
   section; motion (word-reveal + fade-up) provides the "alternative to
   overlay" presentation the KV alone can't safely offer. */
.hero-reveal{padding:clamp(64px,9vh,110px) 0 clamp(56px,8vh,96px)}
.hero-reveal__in{display:flex;flex-direction:column;align-items:center;text-align:center;gap:clamp(16px,2.2vh,22px)}
.hero-reveal__h{font-family:var(--serif);font-weight:500;font-style:normal;text-wrap:balance;
  font-size:clamp(30px,5vw,58px);line-height:1.08;letter-spacing:-.01em;color:#fff;max-width:16ch}
.hero-reveal__p{font-weight:200;font-size:clamp(16px,2vw,22px);line-height:1.4;letter-spacing:-.01em;color:var(--on-dark-mut);max-width:34ch}
.hero-reveal__p b{font-weight:500;color:#fff}
.hero-reveal__cta{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:6px}
.hero-reveal__chip{margin-top:2px}

/* ---------------------------------------------------------- STORYTELLING scenes */
/* chapter marker that prefixes a section's narrative beat */
.scene{display:inline-flex;align-items:center;gap:12px;margin-bottom:10px}
.scene__no{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--red-soft)}
.scene__no::before{content:"";display:inline-block;width:26px;height:1px;background:var(--red-soft);margin-right:11px;vertical-align:middle;opacity:.6}
.scene__name{font-family:var(--mono);font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--on-dark-faint)}
.sec-light .scene__name{color:var(--on-light-faint)}

/* word-by-word reveal for narrative headlines */
.tell .wd{display:inline-block;opacity:0;transform:translateY(.5em);filter:blur(4px);
  transition:opacity .8s var(--ease-out),transform .8s var(--ease-out),filter .8s var(--ease-out)}
.tell.in .wd{opacity:1;transform:none;filter:none;transition-delay:calc(var(--i) * .045s)}
@media(prefers-reduced-motion:reduce){.tell .wd{opacity:1!important;transform:none!important;filter:none!important}}

/* progress rail (scroll-story spine) */
.spine{position:fixed;left:max(18px,calc((100vw - var(--wrap-wide))/2 - 4px));top:50%;transform:translateY(-50%);
  z-index:40;display:flex;flex-direction:column;gap:14px;align-items:center}
.spine a{position:relative;width:9px;height:9px;border-radius:50%;border:1px solid var(--on-dark-faint);
  transition:.35s;display:block}
.spine a::after{content:attr(data-label);position:absolute;left:20px;top:50%;transform:translateY(-50%) translateX(-6px);
  white-space:nowrap;font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--on-dark-mut);opacity:0;pointer-events:none;transition:.35s}
.spine a:hover::after{opacity:1;transform:translateY(-50%)}
.spine a:hover{border-color:var(--signal)}
.spine a.on{background:var(--signal);border-color:var(--signal);box-shadow:0 0 0 4px rgba(207,224,246,.14)}
.nav.on-light~.spine a,body.spine-light .spine a{border-color:var(--on-light-faint)}
@media(max-width:1280px){.spine{display:none}}


/* ---------- REVEAL (brand-intro atom motif) ----------
   Moved out of the page's inline <style id="v4-story-css">. */

  /* ---------- REVEAL : brand-level intro, fully-framed atom ---------- */
  #reveal.rv-strong{position:relative;overflow:hidden;min-height:100vh;display:flex;align-items:center;padding:clamp(90px,13vh,150px) 0}
  /* soft atmospheric core glow behind the atom — gives depth, not clutter */
  #reveal.rv-strong::before{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
    width:min(86vmin,760px);aspect-ratio:1;z-index:0;pointer-events:none;
    background:radial-gradient(circle, rgba(110,150,220,.20), rgba(90,120,190,.07) 42%, transparent 68%)}
  /* the atom is now FULLY in frame (vmin-based), centered, complete — no aggressive side-crop */
  .rvx__orbit{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:min(84vmin,720px);aspect-ratio:1;z-index:0;pointer-events:none}
  .rvx__orbit svg{width:100%;height:100%;opacity:.6;animation:rvxSpin 120s linear infinite}
  @media(prefers-reduced-motion:reduce){.rvx__orbit svg{animation:none}}
  @keyframes rvxSpin{to{transform:rotate(360deg)}}
  .rvx__orbit .ring{fill:none;stroke:rgba(159,192,234,.2);stroke-width:.4}
  .rvx__orbit .cnode{fill:#cfe0f6}
  #reveal.rv-strong .hero-reveal__in{position:relative;z-index:1;gap:clamp(15px,2.1vh,24px);max-width:min(1180px,94vw);margin-inline:auto}
  .rvx__eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--signal)}
  .rvx__eyebrow .d{width:6px;height:6px;border-radius:50%;background:var(--signal);box-shadow:0 0 10px 2px rgba(110,166,240,.6)}
  .rvx__h{font-family:var(--serif);font-weight:150;font-style:normal;font-size:clamp(27px,5.9vw,52px);line-height:1;letter-spacing:.07em;color:#fff;text-wrap:balance;margin:0}
  .rvx__h em{font-style:italic;color:#cfe0f6}
  .rvx__sub{font-weight:200;font-size:clamp(18px,2.7vw,30px);line-height:1.25;letter-spacing:-.01em;color:#fff;text-wrap:balance;margin:0;text-align:center}
  .rvx__sub2{font-weight:200;font-size:clamp(18px,2.7vw,30px);line-height:1.25;letter-spacing:-.01em;color:#fff;text-wrap:balance;margin:0;text-align:left}
  .rvx__sub .kw-line{display:inline-block;width:clamp(22px,3vw,40px);height:1px;background:rgba(255,255,255,.35);vertical-align:middle;margin-left:clamp(8px,1vw,14px);margin-right:0}
  .rvx__sub .kw{position:relative;display:inline-flex;align-items:center;gap:.5em;font-weight:300;white-space:nowrap;vertical-align:middle;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:.10em .95em .10em .8em;
    background:linear-gradient(rgba(255,255,255,.35),rgba(255,255,255,.35)) left center / .8em 1px no-repeat}
  /* glow lives on its own layer (::after), separate from the icon (::before) —
     clip-path on the icon was cutting off filter:drop-shadow, so the halo
     couldn't render; this radial blob has no clip-path and sits behind it. */
  .rvx__sub .kw::after{content:"";position:absolute;left:calc(.8em - 3px);top:50%;width:21px;height:21px;
    transform:translateY(-50%);border-radius:50%;pointer-events:none;z-index:0;
    background:radial-gradient(circle, rgba(255,255,255,.95), rgba(110,166,240,.55) 45%, transparent 72%)}
  .rvx__sub .kw::before{content:"";position:relative;z-index:1;flex:none;width:15px;height:15px;background:#fff;clip-path:polygon(50% 0%,63% 37%,100% 50%,63% 63%,50% 100%,37% 63%,0% 50%,37% 37%)}
  @media(prefers-reduced-motion:no-preference){
    .rvx__sub .kw::after{animation:kwGlow 2.6s ease-in-out infinite}
    .rvx__sub .kw::before{animation:kwTwinkle 2.6s ease-in-out infinite}
  }
  @keyframes kwGlow{
    0%,100%{opacity:.75;transform:translateY(-50%) scale(.9)}
    50%{opacity:1;transform:translateY(-50%) scale(1.15)}
  }
  @keyframes kwTwinkle{
    0%,42%,100%{opacity:1}
    50%{opacity:.35}
    58%{opacity:1}
    78%{opacity:1}
    83%{opacity:.5}
    88%{opacity:1}
  }
  .rvx__usp{font-size:clamp(13px,1.55vw,16.5px);line-height:1.7;color:var(--on-dark);max-width:72ch;margin:2px auto 0;text-wrap:pretty}
  .rvx__usp b{color:#fff;font-weight:500;white-space:nowrap}
  #reveal.rv-strong .hero-reveal__cta{margin-top:clamp(8px,1.4vh,16px)}

/* ===== css/pages/hero-video.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Hero Video
   Full-bleed autoplay/muted/loop video hero: readability overlay gradient,
   top/bottom copy anchoring (brand lockup top, CTA + scroll-cue bottom).
   ============================================================ */

  .hero--video{position:relative;min-height:90svh;margin-top:75px;overflow:hidden;isolation:isolate;background:#06080b;display:block}
  .hero__video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;
    z-index:0;pointer-events:none;background:#06080b;
    /* hard guarantee: the video layer never scales/zooms/animates via CSS */
    transform:none!important;transition:none!important;animation:none!important;will-change:auto}
  /* gentle top+bottom readability bands only — the middle of the video (the
     product) stays fully clear, per the KV "never cover the product" rule */
     
  .hero__overlay{position:absolute;inset:0;z-index:1;pointer-events:none;
    background:
      linear-gradient(180deg, rgba(5,7,11,.58) 0%, rgba(5,7,11,.14) 15%, transparent 32%),
      linear-gradient(0deg,   rgba(5,7,11,.74) 0%, rgba(5,7,11,.26) 15%, transparent 38%);}
  /* brand lockup pinned top-centre, CTA + scroll-cue pinned bottom-centre —
     consistent at every viewport (overrides the shared KV mobile flow rules) */
  .hero--video .hero__top{position:absolute;left:50%;top:clamp(94px,13vh,150px);transform:translateX(-50%);
    z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center}
  .hero--video .hero__bottom{position:absolute;left:50%;bottom:clamp(18px,4.5vh,48px);transform:translateX(-50%);
    z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center;
    gap:clamp(10px,1.6vh,16px);width:100%;max-width:var(--wrap);padding:0 var(--pad)}
  @media(max-width:600px){ .hero--video .hero__top{top:clamp(88px,12vh,120px)} }

/* ===== css/pages/precision-story.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Precision Signal Story
   Pinned/sticky 4-chapter scroll story ("Tín hiệu chính xác"): molecular
   scale → sonication → 3-pillar mechanism → regulatory seal, with a bottom
   progress timeline. Also includes the final journey CTA (horizontal video
   stage) and small scoped overrides (#products sizing, #needs edge spacing).
   Companion JS: js/scroll-story.js
   ============================================================ */

  /* ---------- PINNED MASTER CHAPTER STORY ---------- */
  .pinmaster{position:relative}
  .pm__track{position:relative;height:460vh}
  .pm__stage{position:sticky;top:0;height:100vh;min-height:600px;overflow:hidden;display:flex;flex-direction:column;padding:clamp(76px,11vh,116px) 0 clamp(18px,3vh,30px)}
  .pm__orbit{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);width:min(120vw,980px);aspect-ratio:1;z-index:0;pointer-events:none;opacity:.5}
  /* background orbit REMOVED here — it competed with the content. A single soft
     directional glow now sits behind the right-side visual for atmosphere. */
  .pm__orbit{display:none}
  .pm__stage::before{content:"";position:absolute;right:-4%;top:50%;transform:translateY(-50%);width:56%;height:82%;z-index:0;pointer-events:none;
    background:radial-gradient(ellipse 62% 56% at 62% 48%, rgba(96,132,200,.16), rgba(96,132,200,.05) 46%, transparent 72%)}
  .pinmaster.on-legal .pm__stage::before{background:radial-gradient(ellipse 62% 56% at 62% 48%, rgba(224,86,110,.16), rgba(224,86,110,.05) 46%, transparent 72%)}
  .pm__eyebrow{position:relative;z-index:2;flex:none;max-width:var(--wrap);width:100%;margin:0 auto;padding:0 var(--pad);font-family:var(--mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--on-dark-faint);display:flex;gap:10px;align-items:center}
  .pm__eyebrow .scene__no,.pm__eyebrow b{color:var(--signal)}
  .pm__eyebrow .pm__sep{color:var(--on-dark-faint)}
  .pm__chapters{position:relative;z-index:1;flex:1;min-height:0;max-width:var(--wrap);width:100%;margin:0 auto;padding:0 var(--pad)}
  .pmc{position:absolute;inset:0;display:flex;align-items:center;opacity:0;visibility:hidden;transform:translateY(28px);transition:opacity .55s var(--ease),transform .7s var(--ease),visibility .55s}
  .pmc.on{opacity:1;visibility:visible;transform:none}
  .pmc__grid{display:grid;grid-template-columns:0.82fr 1.18fr;gap:clamp(28px,4.6vw,74px);align-items:center;width:100%}
  .pmc__kicker{display:inline-flex;align-items:center;gap:12px;font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--on-dark-faint);margin-bottom:18px}
  .pmc__kicker b{font-weight:700;font-size:13px;color:var(--red-soft)}
  .pmc__kbar{width:30px;height:1px;background:linear-gradient(90deg,var(--red-soft),transparent)}
  .pmc--legal .pmc__kicker b{color:var(--red-soft)}
  .pmc--legal .pmc__kicker{color:var(--red-soft)}
  .pmc--legal .pmc__kbar{background:linear-gradient(90deg,var(--red-soft),transparent)}
  .pmc--legal .pmc__h em{color:#f0a9b6}
  .pmc__h{font-family:var(--serif);font-weight:500;font-style:normal;font-size:clamp(32px,4.9vw,66px);line-height:1.02;letter-spacing:-.02em;color:#fff;text-wrap:balance;margin:0}
  .pmc__h em{font-style:italic;color:#cfe0f6}
  .pmc__p{font-weight:200;font-size:clamp(15px,1.55vw,19px);line-height:1.6;color:var(--on-dark-mut);max-width:46ch;margin:18px 0 0;text-wrap:pretty}
  .pmc__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .pmc__meta span{font-family:var(--mono);font-size:11px;letter-spacing:.03em;color:var(--on-dark-mut);padding:8px 13px;border:1px solid var(--line-dark);border-radius:100px;background:rgba(255,255,255,.03)}
  .pmc__meta b{color:#fff;font-weight:600}
  .pmc__viz{position:relative;display:flex;align-items:center;justify-content:center;min-height:clamp(300px,56vh,560px)}
  /* ch1 molecular scale — dominant, cinematic */
  .pmscale{display:flex;align-items:flex-end;justify-content:center;gap:clamp(14px,2.8vw,40px);width:100%}
  .pmscale__m{position:relative;display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;opacity:.4;transition:.5s}
  .pmscale__m--gold{opacity:1;transform:translateY(-14px) scale(1.2)}
  .pmscale__ring{width:clamp(74px,10.5vw,150px);aspect-ratio:1}
  .pmscale__ring svg{width:100%;height:100%}
  .pmscale__k{font-family:var(--mono);font-size:11px;color:#fff}
  .pmscale__t{font-family:var(--mono);font-size:9px;letter-spacing:.08em;text-transform:uppercase;color:var(--on-dark-faint)}
  .pmscale__m--gold .pmscale__k{color:#ffe6b0}
  .pmscale__badge{position:absolute;top:-22px;left:50%;transform:translateX(-50%);white-space:nowrap;font-family:var(--mono);font-size:8.5px;letter-spacing:.1em;text-transform:uppercase;color:#ffd98a;padding:3px 8px;border:1px solid rgba(255,214,140,.35);border-radius:100px;background:rgba(255,214,140,.06)}
  /* ch1 molecular-scale animation — a mini scientific scene:
     · 15.2 kDa (gold) = the chosen sweet spot: monomers orbit + gold glow breathes
     · >500 kDa = heavy/inert: drifts very slowly
     · <10 kDa = unstable/inflammatory: nervous jitter
     staggered entrance each time the chapter activates. */
  /* Animations ARM on scroll-in (.pinmaster.armed added by JS when the section
     enters view) and re-fire each time a chapter re-activates — so the motion
     is seen as you scroll INTO the section, not spent silently at page load. */
  @media(prefers-reduced-motion:no-preference){
    /* ---- Chapter 1 · molecular scale ---- */
    .pinmaster.armed .pmc.on .pmscale__m{animation:pmScaleIn .7s var(--ease) both}
    .pinmaster.armed .pmc.on .pmscale__m:first-child{animation-delay:.05s}
    .pinmaster.armed .pmc.on .pmscale__m--gold{animation:pmScaleIn .7s var(--ease) .18s both, pmGoldGlow 3.6s ease-in-out 1s infinite}
    .pinmaster.armed .pmc.on .pmscale__m:last-child{animation-delay:.31s}
    .pinmaster.armed .pmc.on .pmscale__m--gold .pmscale__ring svg{animation:pmSpinSlow 15s linear infinite;transform-origin:50% 50%}
    .pinmaster.armed .pmc.on .pmscale__m:first-child .pmscale__ring svg{animation:pmSpinRev 46s linear infinite;transform-origin:50% 50%}
    .pinmaster.armed .pmc.on .pmscale__m:last-child .pmscale__ring{animation:pmJitter 1.5s steps(5,end) infinite}
    .pinmaster.armed .pmc.on .pmscale__m--gold .pmscale__badge{animation:pmBadge 3.6s ease-in-out 1s infinite}
    /* ---- Chapter 2 · sonication : waves build energy, a scan pass sweeps L→R
       (the controlled ultrasound fragmentation), gold cut-line pulses ---- */
    .pinmaster.armed .pmc.on .pmwave{animation:pmScaleIn .7s var(--ease) both}
    .pinmaster.armed .pmc.on .pmwave svg{animation:pmWaveAmp 3.8s ease-in-out infinite;transform-origin:50% 50%}
    .pinmaster.armed .pmc.on .pmwave .wv{animation:pmWaveFlow 5s linear infinite}
    .pinmaster.armed .pmc.on .pmwave .wv:nth-child(2){animation-duration:3.6s}
    .pinmaster.armed .pmc.on .pmwave .wv:nth-child(3){animation-duration:2.6s}
    .pinmaster.armed .pmc.on .pmwave__scan{animation:pmScan 3.4s var(--ease) infinite}
    .pinmaster.armed .pmc.on .pmwave__cut{animation:pmCutGlow 2.2s ease-in-out infinite}
  }
  @keyframes pmScaleIn{from{opacity:0;transform:translateY(24px)}}
  @keyframes pmSpinSlow{to{transform:rotate(360deg)}}
  @keyframes pmSpinRev{to{transform:rotate(-360deg)}}
  @keyframes pmJitter{0%,100%{transform:translate(0,0)}20%{transform:translate(1.5px,-1.2px)}40%{transform:translate(-1.6px,1px)}60%{transform:translate(1.2px,1.6px)}80%{transform:translate(-1px,-1.4px)}}
  @keyframes pmGoldGlow{0%,100%{filter:drop-shadow(0 6px 16px rgba(255,214,140,.22))}50%{filter:drop-shadow(0 6px 30px rgba(255,214,140,.6))}}
  @keyframes pmBadge{0%,100%{opacity:.88;transform:translateX(-50%) scale(1)}50%{opacity:1;transform:translateX(-50%) scale(1.06)}}
  @keyframes pmWaveAmp{0%,100%{transform:scaleY(.72)}50%{transform:scaleY(1.14)}}
  @keyframes pmWaveFlow{from{stroke-dashoffset:0}to{stroke-dashoffset:-120}}
  @keyframes pmScan{0%{transform:translateX(-130%);opacity:0}12%{opacity:1}88%{opacity:1}100%{transform:translateX(430%);opacity:0}}
  @keyframes pmCutGlow{0%,100%{opacity:.7;box-shadow:0 0 10px rgba(255,214,140,.5)}50%{opacity:1;box-shadow:0 0 24px rgba(255,214,140,.95)}}
  /* ch2 sonication wave — large cinematic field */
  .pmwave{position:relative;width:100%;max-width:560px;aspect-ratio:16/10;border:1px solid var(--line-dark);border-radius:var(--r-lg);background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));overflow:hidden;box-shadow:0 40px 90px -50px rgba(0,0,0,.7)}
  .pmwave svg{width:100%;height:100%}
  .pmwave .wv{fill:none;stroke:#9fc0ea;stroke-width:1.6;stroke-dasharray:22 8}
  .pmwave__scan{position:absolute;top:0;bottom:0;left:0;width:30%;z-index:1;pointer-events:none;opacity:0;
    background:linear-gradient(90deg,transparent,rgba(159,192,234,.14) 42%,rgba(255,214,140,.24) 50%,rgba(159,192,234,.14) 58%,transparent)}
  .pmwave__cut{position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(rgba(255,214,140,0),#ffd98a 45%,rgba(255,214,140,0));box-shadow:0 0 16px rgba(255,214,140,.8)}
  .pmwave__cap{position:absolute;left:0;right:0;bottom:14px;text-align:center;font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:var(--on-dark-mut);padding:0 16px}
  /* ch3 orbit + pillars — large signature motif */
  .pmorbit{position:relative;width:min(100%,480px);aspect-ratio:1}
  .pmorbit svg{width:100%;height:100%;overflow:visible}
  .pmorbit .o{fill:none;stroke:rgba(159,192,234,.2);stroke-width:.6}
  .pmorbit .sp{stroke:rgba(159,192,234,.25);stroke-width:.5}
  .pmorbit .pt{fill:#9fc0ea}
  .pmorbit .pt--1{fill:#ffd98a}
  .pmorbit__rot{transform-origin:50% 50%;animation:rvxSpin 64s linear infinite}
  .pmorbit__core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);text-align:center;width:64%}
  .pmorbit__core b{display:block;font-size:15px;color:#fff;font-weight:600}
  .pmorbit__core span{font-family:var(--mono);font-size:9.5px;letter-spacing:.06em;color:var(--on-dark-faint)}
  .pmpills{display:flex;flex-direction:column;gap:13px;margin-top:22px}
  .pmpill{display:flex;gap:13px;align-items:flex-start}
  .pmpill b{font-family:var(--serif);font-style:italic;font-size:20px;color:#9fc0ea;line-height:1.1;flex:none;width:26px}
  .pmpill>span{display:flex;flex-direction:column;gap:2px;font-size:12.5px;color:var(--on-dark-mut);line-height:1.42}
  .pmpill i{font-style:normal;font-size:14px;font-weight:600;color:#fff}
  /* ch4 cert seal — distinctive, premium, authoritative (Fusion red) */
  .pmcert{position:relative;width:min(100%,440px);aspect-ratio:1;display:flex;align-items:center;justify-content:center}
  .pmcert::before{content:"";position:absolute;left:50%;top:50%;width:66%;aspect-ratio:1;transform:translate(-50%,-50%);border-radius:50%;
    background:radial-gradient(circle, rgba(224,86,110,.22), rgba(224,86,110,.05) 52%, transparent 72%)}
  .pmcert svg{position:absolute;inset:0;width:100%;height:100%}
  .pmcert .ring circle{fill:none;stroke:rgba(224,86,110,.4);stroke-width:.5}
  .pmcert__badge{position:relative;display:flex;flex-direction:column;align-items:center;gap:7px}
  .pmcert__d{font-family:var(--serif);font-style:italic;font-weight:500;font-size:clamp(84px,12vw,158px);color:#fff;line-height:.9;letter-spacing:-.03em;
    text-shadow:0 0 40px rgba(224,86,110,.45)}
  .pmcert__lbl{font-family:var(--mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--red-soft)}
  .pmcert__seal{display:flex;gap:8px;margin-top:6px}
  .pmcert__seal span{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--on-dark-mut);padding:5px 11px;border:1px solid rgba(224,86,110,.3);border-radius:100px;background:rgba(224,86,110,.05)}
  /* bottom timeline */
  .pm__timeline{position:relative;z-index:3;flex:none;max-width:var(--wrap);width:100%;margin:0 auto;padding:clamp(12px,2vh,20px) var(--pad) 0}
  .pm__progress{position:relative;height:1px;background:rgba(207,224,246,.14);margin-bottom:16px}
  .pm__progress-fill{position:absolute;left:0;top:0;height:1px;width:100%;transform-origin:left;transform:scaleX(var(--pmp,0));background:linear-gradient(90deg,#ffd98a,#9fc0ea 45%);box-shadow:0 0 8px rgba(159,192,234,.5);transition:transform .3s var(--ease-out)}
  .pm__dots{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(8px,2vw,28px)}
  .pm__dotbtn{display:flex;align-items:center;gap:10px;background:none;border:none;cursor:pointer;text-align:left;padding:0;opacity:.4;transition:opacity .4s;color:inherit}
  .pm__dotbtn.on{opacity:1}
  .pm__dot{width:11px;height:11px;border-radius:50%;flex:none;background:rgba(159,192,234,.3);box-shadow:0 0 0 4px #06080b;transition:.4s}
  .pm__dotbtn.done .pm__dot{background:#9fc0ea}
  .pm__dotbtn.on .pm__dot{background:radial-gradient(circle at 50% 42%,#fff,#9fc0ea 60%,transparent 74%);box-shadow:0 0 0 4px #06080b,0 0 16px 3px rgba(159,192,234,.6)}
  .pm__dl{display:flex;flex-direction:column;line-height:1.2;min-width:0}
  .pm__dl b{font-size:13px;font-weight:600;color:#fff;white-space:nowrap}
  .pm__dl i{font-family:var(--mono);font-style:normal;font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-dark-faint)}
  .pm__navbtn{display:none;align-items:center;justify-content:center;flex:none;width:36px;height:36px;
    border-radius:50%;border:1px solid rgba(207,224,246,.3);background:rgba(255,255,255,.04);color:#fff;
    font-size:20px;line-height:1;cursor:pointer;transition:background .25s,border-color .25s}
  .pm__navbtn:hover{background:rgba(255,255,255,.1);border-color:rgba(207,224,246,.6)}
  @media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
    .pm__track{height:auto!important}
    #difference.mechx .pm__track{height:auto!important}
    #difference.section,#needs.section{padding-block:clamp(36px,6vh,64px)!important}
    .pm__stage{position:static;height:auto!important;min-height:0;display:block;overflow:visible;padding:clamp(58px,9vh,88px) 0}
    .pm__orbit{display:none}
    .pm__chapters{min-height:0}
    .pmc{display:none;padding:clamp(30px,6vh,52px) 0;transition:opacity .25s ease}
    .pmc.on{position:relative;inset:auto;opacity:1;visibility:visible;transform:none;display:block}
    .pm__timeline{display:flex;align-items:center;justify-content:space-between;gap:10px}
    .pm__timeline .pm__progress{display:none}
    .pm__dots{flex:1;display:flex;justify-content:center}
    .pm__navbtn{display:flex}
    .pmc__grid{grid-template-columns:1fr;gap:26px}
    .pmc__viz{min-height:0}
    /* Dot gọn: chỉ chấm tròn, không kèm nhãn chữ (tránh tràn ngang) —
       tên bước đã có sẵn trong nội dung chính (.pmc__kicker), không lặp lại */
    .pm__dl{display:none}
    .pm__dots{gap:10px}
    .pm__dotbtn{justify-content:center}
  }
  @media(max-width:560px){.pmscale{gap:8px}.pmc__viz{min-height:180px}}

  /* ---------- MOBILE ONLY : "Kích thước phân tử" breathing room ----------
     Đã giảm bớt so với bản gốc: khối này ban đầu thiết kế cho layout xổ 3
     hàng cũ (đã bỏ, giờ chỉ hiện 1 chapter/lần) nên không cần nhiều khoảng
     đệm như trước — giảm để section không bị quá cao trên mobile. */
  @media(max-width:768px){
    .pmc{padding-top:clamp(16px,3vh,24px)}
    .pmc:first-of-type{padding-top:clamp(12px,2vh,18px)}
    .pmc__kicker{margin-bottom:16px}
    .pmc__p{margin-top:12px}
    .pmc__meta{margin-top:18px;margin-bottom:8px}
    .pmc__viz{margin-top:18px;min-height:160px}
    .pmscale{gap:16px;flex-wrap:wrap;row-gap:28px}
    .pmscale__badge{top:-26px}
  }
  @media(max-width:430px){
    .pmc__viz{min-height:140px;margin-top:14px}
    .pmscale{gap:12px}
  }

  /* ---------- FINAL : centered copy + full-width HORIZONTAL video stage ---------- */
  .finalx{position:relative;overflow:hidden;isolation:isolate;padding-bottom:clamp(56px,8vh,96px)}
  .finalx__orbit{position:absolute;right:-12%;top:34%;transform:translateY(-50%);width:min(58vw,600px);aspect-ratio:1;z-index:0;opacity:.3;pointer-events:none}
  .finalx__orbit svg{width:100%;height:100%;animation:rvxSpin 120s linear infinite}
  .finalx__orbit .ring{fill:none;stroke:rgba(159,192,234,.16);stroke-width:.4}
  .finalx__head{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center;gap:clamp(13px,1.9vh,20px);max-width:820px;margin:0 auto clamp(34px,5vh,60px)}
  /* balanced — not oversized: the video, not the title, carries the section */
  .finalx__h{font-size:clamp(32px,4.4vw,60px)!important;line-height:1.05;letter-spacing:-.018em;margin:6px 0 0;text-wrap:balance}
  .finalx__h .serif{font-style:italic}
  .finalx__sub{font-weight:200;font-size:clamp(15px,1.85vw,20px);line-height:1.55;color:var(--on-dark-mut);max-width:52ch;margin:0 auto;text-wrap:pretty}
  .finalx__cta{display:flex;flex-wrap:wrap;justify-content:center;gap:13px;margin-top:clamp(6px,1.2vh,14px)}
  /* horizontal (landscape) video stage — wide, cinematic, clearly visible */
  .finalx__stage{position:relative;z-index:2;width:100%;max-width:1080px;margin:0 auto;aspect-ratio:16/9;
    border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-dark);
    box-shadow:0 60px 120px -46px rgba(0,0,0,.75);background:#06080b}
  .finalx__video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;opacity:1}
  .finalx__vtag{position:absolute;left:16px;bottom:16px;z-index:2;display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:#fff;background:rgba(6,8,12,.5);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.16);padding:7px 12px;border-radius:100px}
  .finalx__vtag .d{width:5px;height:5px;border-radius:50%;background:var(--red-soft)}
  .finalx__note{text-align:center;margin-top:clamp(18px,2.6vh,30px);font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-faint)}
  @media(max-width:640px){
    .finalx__stage{aspect-ratio:4/3}
  }

  /* ---------- PRODUCT presence : larger, more iconic showcase (scoped to v5) ---------- */
  #products .prod__stage{width:clamp(210px,22vw,300px);height:clamp(320px,33vw,440px)}
  #products .prod__photo{filter:drop-shadow(0 38px 52px rgba(0,0,0,.66))}
  #products .prod:hover .prod__photo{transform:translateY(-8px) scale(1.035);filter:drop-shadow(0 50px 66px rgba(0,0,0,.72))}

  /* ---------- NEEDS scroll : guarantee trailing spacing at the far-right end ----------
     Scroll containers drop the container's trailing padding, AND a trailing
     margin on the last flex child is not counted toward scrollable overflow in
     Chromium. A real flex-item spacer (::after) always contributes to
     scrollWidth, so it reliably creates the end inset. The flex `gap` also
     applies before it, so subtract the gap from the basis to match the leading
     inset (~55px) exactly. */
  #needs .needs{padding-right:0}
  #needs .needs::after{content:"";flex:0 0 calc(max(clamp(28px,6vw,84px),calc(50vw - var(--wrap)/2)) - clamp(16px,1.8vw,24px));align-self:stretch}

/* ===== css/design-system/microsite.css ===== */
/* ============================================================
   ACURHYAL · Microsite (light-content revision)
   Shared system for the revised pages: dark page-hero + light editorial
   sections, summary/nav cards, pillars, accordions, tabs, comparison table,
   interest chips, lead-capture forms, ZBS flow diagrams, product cards.
   Load AFTER tokens/base/components/hero so it can layer on top.
   Single font: Manrope (via tokens). ============================================================ */

/* ---- light page shell ---- */
body.lightpage{background:var(--paper);color:var(--on-light);font-weight:400}
body.lightpage .world,body.lightpage .grain{display:none}
.lightpage ::selection{background:rgba(204,31,60,.18);color:#1a0308}

/* section rhythm a touch tighter than the cinematic home */
.lightpage .section{padding-block:clamp(64px,8vw,112px)}
.psec-tight{padding-block:clamp(44px,5.5vw,72px)!important}

/* ---------------- PAGE HERO (dark) ---------------- */
.phero{position:relative;background:var(--ink);color:var(--on-dark);overflow:hidden;isolation:isolate;
  padding:clamp(120px,16vh,176px) 0 clamp(56px,7vw,92px)}
.phero::before{content:"";position:absolute;inset:0;z-index:-2;
  background:radial-gradient(120% 80% at 50% -10%,#1a222f 0%,#0c0f15 46%,var(--ink) 80%)}
.phero__orbit{position:absolute;z-index:-1;top:50%;right:-6%;translate:0 -50%;width:min(48vw,640px);aspect-ratio:1;
  opacity:.5;pointer-events:none}
.phero__orbit svg{width:100%;height:100%}
.phero__orbit .ring ellipse{fill:none;stroke:rgba(207,224,246,.4);stroke-width:.4}
.phero__orbit .cnode{fill:#fff}
@media(prefers-reduced-motion:no-preference){.phero__orbit{animation:phspin 60s linear infinite}}
@keyframes phspin{to{rotate:360deg}}
.phero__in{position:relative}
.crumb{display:flex;align-items:center;gap:9px;font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--on-dark-faint);margin-bottom:26px;flex-wrap:wrap}
.crumb a{color:var(--on-dark-mut);transition:color .25s}
.crumb a:hover{color:var(--on-dark)}
.crumb .sep{opacity:.5}
.phero__eyebrow{margin-bottom:20px}
.phero__eyebrow--margintop{margin-bottom:20px;margin-top:20px}
.phero h1{font-size:var(--t-xl);font-weight:200;line-height:1.03;letter-spacing:-.02em;max-width:20ch}
.phero h1 b{font-weight:700}
.phero h1 .em{font-weight:600;color:var(--signal)}
.phero__sub{font-size:var(--lede);font-weight:300;line-height:1.6;color:var(--on-dark);max-width:56ch;margin-top:20px;text-wrap:pretty}
.phero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.phero__meta{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line-dark)}
.phero__meta span{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--on-dark-mut)}
.phero__meta b{color:var(--signal);font-weight:600}

/* ---------------- SECTION HEADER (light) ---------------- */
.psec__head{max-width:64ch;margin-bottom:clamp(32px,4vw,52px)}
.psec__head--c{margin-inline:auto;text-align:center}
/* wide/no-gap variant — scoped via modifier class, only used on
   kham-pha-acurhyal-co-che.html so other .psec__head pages are unaffected */
.psec__head--wide{max-width:100ch;margin-bottom:0}
.psec__head--wide--margin{max-width:100ch;margin-bottom:clamp(32px,4vw,52px)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;font-weight:600;
  letter-spacing:.28em;text-transform:uppercase;color:var(--red);margin-bottom:16px}
.eyebrow .no{color:var(--on-light-faint)}
.eyebrow .bar{width:26px;height:1px;background:var(--hair-2)}
.psec__title{font-size:var(--t-lg);font-weight:300;line-height:1.08;letter-spacing:-.02em;color:var(--on-light)}
.psec__title b{font-weight:700}
.psec__title .em{color:var(--red);font-weight:600}
.psec__lede{font-size:var(--lede);font-weight:400;line-height:1.62;color:var(--on-light-mut);max-width:60ch;margin-top:16px;text-wrap:pretty}
.psec__head--c .psec__lede{margin-inline:auto}

/* body prose */
.prose{color:var(--on-light-mut);font-size:16px;line-height:1.72;max-width:66ch}
.prose p+p{margin-top:1em}
.prose strong,.prose b{color:var(--on-light);font-weight:600}
.divider{height:1px;background:var(--hair);border:0;margin:0}

/* ---------------- SECTION HEAD (home-page centered variant) — brought in
   from sections.css so pages that only load microsite.css (dao-tao-su-kien-cme,
   livestream) can reuse the "CẬP NHẬT SỰ KIỆN CHUYÊN MÔN" block verbatim. ---------------- */
.head{display:flex;flex-direction:column;align-items:flex-start;gap:18px}
.head--c{align-items:center;text-align:center;margin-inline:auto;max-width:60ch}
.head--c2{align-items:center;text-align:center;margin-inline:auto;max-width:100ch}

/* ---------------- EVENTS / RESOURCES (light-native — these pages are
   always .lightpage, so styled light directly rather than dark+override) ---------------- */
.train{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,3vw,40px);margin-top:clamp(36px,4vw,56px)}
@media(max-width:820px){.train{grid-template-columns:1fr}}
.sched{background:var(--card);border:1px solid var(--hair);border-radius:var(--r-lg);padding:clamp(22px,2.6vw,32px)}
.sched__h{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.sched__h h4{font-size:19px;font-weight:400;color:var(--on-light)}
.live-dot{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--red-soft)}
.live-dot i{width:7px;height:7px;border-radius:50%;background:var(--red);box-shadow:0 0 0 0 rgba(204,31,60,.6);animation:ping 1.8s ease-out infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(204,31,60,.6)}100%{box-shadow:0 0 0 9px rgba(204,31,60,0)}}
.ev{display:flex;gap:16px;padding:16px 0;border-top:1px solid var(--hair)}
.ev__d{font-family:var(--mono);font-size:12px;line-height:1.4;color:var(--ac,var(--red));flex:none;width:54px}
.ev__b h5{font-size:15px;font-weight:500;color:var(--on-light);margin-bottom:3px}
.ev__b p{font-size:12.5px;color:var(--on-light-mut)}
.lnk{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--on-light-mut);transition:color .3s}
.lnk:hover{color:var(--on-light)}
.lnk .ar{color:var(--red)}
.res-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:clamp(24px,3vw,40px)}
@media(max-width:680px){.res-strip{grid-template-columns:1fr}}
.res{display:flex;flex-direction:column;gap:8px;padding:22px;border:1px solid var(--hair);border-radius:var(--r);background:var(--card);transition:.4s}
.res:hover{border-color:var(--hair-2);box-shadow:0 24px 60px -40px rgba(20,28,45,.4);transform:translateY(-4px)}
.res__type{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--red)}
.res h4{font-size:16px;font-weight:500;color:var(--on-light)}
.res p{font-size:12.5px;color:var(--on-light-mut);line-height:1.5;flex:1}
.res .dl{font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:var(--red);margin-top:4px}

/* ---------------- SUMMARY / NAV CARDS ---------------- */
.ncards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.ncard{position:relative;display:flex;flex-direction:column;gap:12px;background:var(--card);
  border:1px solid var(--hair);border-radius:var(--r);padding:26px 24px 22px;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .3s;overflow:hidden}
a.ncard:hover{transform:translateY(-4px);box-shadow:0 24px 60px -34px rgba(20,28,45,.5);border-color:var(--hair-2)}
.ncard__no{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--red);font-weight:600}
.ncard__ic{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--paper-2);color:var(--on-light);font-size:19px;flex:none}
.ncard h3{font-size:20px;font-weight:700;letter-spacing:-.01em;color:var(--on-light);line-height:1.2}
.ncard p{font-size:14.5px;line-height:1.6;color:var(--on-light-mut)}
.ncard__go{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--on-light);font-weight:600}
.ncard__go .ar{transition:transform .35s var(--ease)}
a.ncard:hover .ncard__go .ar{transform:translateX(4px)}
.ncard__go.is-red{color:var(--red)}

/* ---------------- STAT ROW ---------------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:2px;
  background:var(--hair);border:1px solid var(--hair);border-radius:var(--r);overflow:hidden}
/* inside a two-up feature column, 4 stats read cleanest as a 2×2 (was orphaning
   the 4th cell into an empty grey row) */
.feature .stats{grid-template-columns:1fr 1fr}
.stats>div{background:var(--card);padding:24px 22px}
.stats b{display:block;font-size:32px;font-weight:700;letter-spacing:-.03em;color:var(--on-light);line-height:1}
.stats b i{font-style:normal;font-size:.5em;font-weight:600;color:var(--on-light-mut);margin-left:3px}
.stats span{display:block;margin-top:8px;font-size:12.5px;color:var(--on-light-mut);line-height:1.4}

/* ---------------- PILLARS (3-pillar infographic) ---------------- */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
/* Reset xung đột: có 1 rule ".pillar" khác (dùng cho .mech__pillars, component
   khác) đặt display:grid;grid-template-columns:auto 1fr trong CSS gốc — vì
   không scoped đúng nên đè nhầm sang card .pillars > .pillar ở đây, làm
   tiêu đề/mô tả xếp thành 2 cột thay vì xếp dọc bình thường. */
.pillars .pillar{display:block}
.pillar{position:relative;background:var(--card);border:1px solid var(--hair);border-radius:var(--r);padding:28px 24px}
.pillar__no{position:absolute;top:20px;right:22px;font-family:var(--mono);font-size:12px;color:var(--on-light-faint);font-weight:600}
.pillar__badge{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.06em;
  background:#0d1017;color:var(--signal)}
.pillar h4{font-size:18px;font-weight:700;color:var(--on-light);letter-spacing:-.01em}
.pillar__tag{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--red);margin:4px 0 12px;font-weight:600}
.pillar p{font-size:14px;line-height:1.62;color:var(--on-light-mut)}
.pillar__loop{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:26px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-light-mut)}
.pillar__loop b{color:var(--on-light);font-weight:600}
.pillar__loop .ar{color:var(--red)}

/* ---------------- ACCORDION ---------------- */
.acc{border-top:1px solid var(--hair)}
.acc__item{border-bottom:1px solid var(--hair)}
.acc__head{display:flex;align-items:center;gap:18px;width:100%;text-align:left;padding:22px 4px;
  font-size:17px;font-weight:600;letter-spacing:-.01em;color:var(--on-light);transition:color .25s}
.acc__label{flex:1;min-width:0;white-space:normal}
.acc__head:hover{color:var(--red)}
.acc__head .num{font-family:var(--mono);font-size:12px;color:var(--red);font-weight:600;flex:none}
.acc__ic{margin-left:auto;width:20px;height:20px;position:relative;flex:none}
.acc__ic::before,.acc__ic::after{content:"";position:absolute;top:50%;left:50%;translate:-50% -50%;background:currentColor}
.acc__ic::before{width:13px;height:1.5px}
.acc__ic::after{width:1.5px;height:13px;transition:transform .3s var(--ease)}
.acc__item.open .acc__ic::after{transform:rotate(90deg) scaleX(0)}
.acc__body{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.acc__body-in{padding:2px 4px 26px}

/* ---------------- TABS ---------------- */
.tabs__btns{display:inline-flex;gap:4px;padding:5px;background:var(--paper-2);border:1px solid var(--hair);border-radius:100px;flex-wrap:wrap}
.tabs__btn{padding:10px 20px;border-radius:100px;font-size:13.5px;font-weight:600;color:var(--on-light-mut);transition:.25s}
.tabs__btn.on{background:#0d1017;color:#fff}
.tabs__panel{display:none;animation:fade .4s}
.tabs__panel.on{display:block}

/* ---------------- COMPARISON TABLE ---------------- */
.ctable{width:100%;border-collapse:separate;border-spacing:0;background:var(--card);border:1px solid var(--hair);
  border-radius:var(--r);overflow:hidden;font-size:14.5px}
.ctable th,.ctable td{padding:18px 20px;text-align:left;vertical-align:top;border-bottom:1px solid var(--hair);line-height:1.55}
.ctable thead th{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;background:var(--paper-2)}
.ctable thead th:last-child{color:var(--red)}
.ctable .rowlbl{font-weight:600;color:var(--on-light);width:20%;background:var(--paper)}
.ctable td{color:var(--on-light-mut)}
.ctable td.acu{color:var(--on-light);background:rgba(204,31,60,.03)}
.ctable tr:last-child th,.ctable tr:last-child td{border-bottom:0}
.ctable b{color:var(--on-light);font-weight:600}

/* ---------------- INTEREST CHIPS (selectable) ---------------- */
.ichips{display:flex;flex-wrap:wrap;gap:8px}
.ichip{position:relative;display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:100px;
  border:1px solid var(--hair-2);background:var(--card);color:var(--on-light-mut);font-size:13px;font-weight:500;
  cursor:pointer;transition:.25s;user-select:none}
.ichip .tick{width:14px;height:14px;border-radius:50%;border:1.5px solid var(--hair-2);flex:none;position:relative;transition:.25s}
.ichip:hover{border-color:var(--hair-2);color:var(--on-light)}
.ichip.on{border-color:var(--red);background:rgba(204,31,60,.05);color:var(--on-light)}
.ichip.on .tick{border-color:var(--red);background:var(--red)}
.ichip.on .tick::after{content:"";position:absolute;top:2.5px;left:5px;width:4px;height:7px;border:solid #fff;border-width:0 1.6px 1.6px 0;transform:rotate(45deg)}

/* topic interest cards (compact, with desc) */
.tcards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.tcard{position:relative;display:flex;flex-direction:column;gap:5px;padding:15px 16px 14px;border-radius:var(--r);
  border:1px solid var(--hair);background:var(--card);cursor:pointer;transition:.28s}
.tcard:hover{border-color:var(--hair-2);transform:translateY(-2px)}
.tcard.on{border-color:var(--red);background:rgba(204,31,60,.04)}
.tcard__tick{position:absolute;top:14px;right:14px;width:18px;height:18px;border-radius:50%;border:1.5px solid var(--hair-2);transition:.25s}
.tcard.on .tcard__tick{border-color:var(--red);background:var(--red)}
.tcard.on .tcard__tick::after{content:"";position:absolute;top:3px;left:6px;width:5px;height:8px;border:solid #fff;border-width:0 1.8px 1.8px 0;transform:rotate(45deg)}
.tcard__no{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--red);font-weight:600}
.tcard h4{font-size:15px;font-weight:700;color:var(--on-light);letter-spacing:-.01em;padding-right:24px}
.tcard p{font-size:12.5px;line-height:1.5;color:var(--on-light-mut)}

/* ---------------- LEAD FORM (light) — compact, premium lead-capture ---------------- */
.lform{background:var(--card);border:1px solid var(--hair);border-radius:var(--r-lg);padding:clamp(20px,2.6vw,32px);
  box-shadow:0 24px 70px -52px rgba(20,28,45,.35)}
.lform__grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field--full{grid-column:1/-1}
.field label{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-light-mut);font-weight:600}
.field .req{color:var(--red)}
.field input,.field select,.field textarea{font-family:var(--sans);font-size:14.5px;font-weight:400;color:var(--on-light);
  background:var(--paper);border:1px solid var(--hair-2);border-radius:10px;padding:11px 14px;transition:border-color .25s,background .25s;width:100%}
.field textarea{min-height:72px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--on-light-faint)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--red);background:#fff}
.field .msg{display:none;font-size:11.5px;color:var(--red)}
.field.bad input,.field.bad select{border-color:var(--red);background:rgba(204,31,60,.03)}
.field.bad .msg{display:block}
.field__hint{font-size:12px;color:var(--on-light-faint)}
.lform__consent{display:flex;gap:10px;align-items:flex-start;margin:4px 0 16px;font-size:12px;color:var(--on-light-mut);line-height:1.5}
.lform__consent input{margin-top:2px;width:16px;height:16px;accent-color:var(--red);flex:none}
.lform .btn{width:100%}
.lform__note{margin-top:16px;font-size:12.5px;color:var(--on-light-faint);line-height:1.5;text-align:center}
.lform__ok{display:none;text-align:center;padding:20px 0}

/* =========================================================
 * FORM WPFORMS TRONG .lform (đăng ký CME / Livestream) — style khớp
 * theo đúng ngôn ngữ .field/.ichip gốc. Scope trong .lform-wpforms để
 * không ảnh hưởng WPForms ở nơi khác trên site.
 * ========================================================= */
.lform-wpforms .wpforms-container{margin:0}
.lform-wpforms .wpforms-field{margin-bottom:12px!important;padding:0!important;position:static}
.lform-wpforms .wpforms-field-label{font-family:var(--mono);font-size:10px!important;letter-spacing:.12em;
  text-transform:uppercase;color:var(--on-light-mut);font-weight:600;margin-bottom:6px;display:block}
.lform-wpforms .wpforms-required-label{color:var(--red)}
.lform-wpforms .wpforms-field input[type=text],
.lform-wpforms .wpforms-field input[type=tel],
.lform-wpforms .wpforms-field input[type=email],
.lform-wpforms .wpforms-field select,
.lform-wpforms .wpforms-field textarea{font-family:var(--sans)!important;font-size:13.5px!important;font-weight:400;color:var(--on-light);
  background:var(--paper);border:1px solid var(--hair-2)!important;border-radius:10px;padding:10px 14px!important;
  transition:border-color .25s,background .25s;width:100%;height:auto;line-height:1.4!important}
.lform-wpforms .wpforms-field textarea{min-height:72px;resize:vertical}
.lform-wpforms .wpforms-field input:focus,
.lform-wpforms .wpforms-field select:focus,
.lform-wpforms .wpforms-field textarea:focus{outline:none;border-color:var(--red)!important;background:#fff;box-shadow:none}
.lform-wpforms .wpforms-error{font-size:11.5px;color:var(--red)!important;margin-top:5px}

/* 2 field text cạnh nhau (Họ tên/SĐT, Email/Vai trò...) — dùng Layout field
   của WPForms để chia cột, CSS chỉ cần đảm bảo khoảng cách khớp */
.lform-wpforms .wpforms-layout-row{margin:0 0 12px!important;padding:0!important;display:flex!important;gap:0}
.lform-wpforms .wpforms-layout-column{padding:0 6px;margin:0!important}
.lform-wpforms .wpforms-layout-column:first-child{padding-left:0}
.lform-wpforms .wpforms-layout-column:last-child{padding-right:0}
.lform-wpforms .wpforms-layout-column .wpforms-field{margin-bottom:0!important}

/* Checkbox field ("Nhu cầu quan tâm", "Kênh nhận tin") — reskin thành pill
   giống .ichip: ẩn checkbox gốc (vẫn giữ thao tác được), label làm pill */
.lform-wpforms .wpforms-field-checkbox ul{list-style:none!important;margin:0!important;padding:0!important;display:flex!important;flex-wrap:wrap;gap:8px}
.lform-wpforms .wpforms-field-checkbox li{margin:0!important;padding:0!important;display:block!important}
.lform-wpforms .wpforms-field-checkbox input[type=checkbox]{position:absolute!important;opacity:0!important;width:1px!important;height:1px!important;margin:0!important;left:0;top:0}
.lform-wpforms .wpforms-field-checkbox li label{position:relative;display:inline-flex!important;align-items:center;gap:0;
  margin:0!important;padding:8px 16px 8px 34px!important;border-radius:100px;border:1px solid var(--hair-2);background:var(--card);
  color:var(--on-light-mut);font-size:12.5px!important;line-height:1.3!important;font-weight:500;cursor:pointer;transition:.25s;user-select:none;width:auto!important}
.lform-wpforms .wpforms-field-checkbox li label::before{content:"";position:absolute;left:13px;top:50%;
  translate:0 -50%;width:13px;height:13px;border-radius:50%;border:1.5px solid var(--hair-2);transition:.25s;background:#fff}
.lform-wpforms .wpforms-field-checkbox input:checked + label{border-color:var(--red);background:rgba(204,31,60,.05);color:var(--on-light)}
.lform-wpforms .wpforms-field-checkbox input:checked + label::before{border-color:var(--red);background:var(--red)}
.lform-wpforms .wpforms-field-checkbox input:focus-visible + label{outline:2px solid var(--red);outline-offset:2px}

/* Consent checkbox (1 lựa chọn, bắt buộc) — không cần dạng pill, giữ dạng
   checkbox thường + text bên cạnh giống .lform__consent gốc */
/* fieldset/legend mặc định của trình duyệt tự có padding/border/margin —
   WPForms bọc field checkbox trong <fieldset>, chưa từng reset nên cộng
   dồn thành chiều cao dư ra ngoài ý muốn. */
.lform-wpforms fieldset{border:none!important;margin:0!important;padding:0!important;min-width:0!important}
.lform-wpforms legend{padding:0!important;margin:0!important}
.lform-wpforms .wpforms-label-hide{position:absolute!important;width:1px!important;height:1px!important;
  overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;margin:0!important;padding:0!important}

.lform-wpforms .wpforms-field-checkbox.wpforms-field-consent,
.lform-wpforms .wpforms-field-agree-terms{border:none!important;padding:0!important;background:none!important}
.lform-wpforms .wpforms-field-checkbox.wpforms-field-consent li label,
.lform-wpforms .wpforms-field-agree-terms li label{padding:0!important;border:none;background:none;border-radius:0;
  display:flex!important;align-items:flex-start;gap:10px;font-size:12px!important;color:var(--on-light-mut);line-height:1.5!important}

/* Disclaimer text (vd: "Tôi đồng ý để The Vigo liên hệ...") — WPForms render
   dạng div mô tả (wpforms-disclaimer-description), không phải checkbox list
   như mình tưởng ban đầu — reset về text đơn giản 1 dòng, không khung/box. */
.lform-wpforms .wpforms-disclaimer-description{border:none!important;background:none!important;padding:0!important;
  margin-top:8px!important;font-size:11.5px!important;line-height:1.5!important;color:var(--on-light-faint)!important;
  height:auto!important;max-height:none!important;overflow-y:visible!important;overflow-x:visible!important;box-shadow:none!important}
.lform-wpforms .wpforms-field-agree-terms input[type=checkbox]{position:static;opacity:1;width:16px;height:16px;
  accent-color:var(--red);flex:none;margin-top:2px}
.lform-wpforms .wpforms-field-agree-terms label::before{content:none}

.lform-wpforms .wpforms-submit-container{margin-top:6px}
.lform-wpforms .wpforms-submit{width:100%;padding:14px;border-radius:100px!important;background:var(--red)!important;color:#fff!important;
  font-family:var(--sans);font-size:15px;font-weight:500;border:none!important;cursor:pointer;transition:background .3s}
.lform-wpforms .wpforms-submit:hover{background:var(--red-soft,#e04)!important}
.lform-wpforms .wpforms-confirmation-container-full{text-align:center;padding:20px 0;border:none;background:none;color:var(--on-light)}
.lform-wpforms .wpforms-confirmation-container-full h3{color:var(--on-light);font-size:22px;font-weight:700;margin:10px 0 8px}
.lform-wpforms .wpforms-confirmation-container-full p{color:var(--on-light-mut)}
.lform-wpforms .wpforms-confirmation-container-full .ico{width:64px;height:64px;border-radius:50%;display:flex;
  align-items:center;justify-content:center;margin:0 auto 18px;background:rgba(72,180,120,.14);
  border:1px solid rgba(72,180,120,.4);color:#2f9e6b;font-size:26px}
.lform.done .lform__body{display:none}
.lform.done .lform__ok{display:block}
.lform__ok .ico{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 18px;
  background:rgba(31,138,91,.12);border:1px solid rgba(31,138,91,.35);color:#1f8a5b;font-size:26px}
.lform__ok h3{font-size:24px;font-weight:700;letter-spacing:-.02em;color:var(--on-light);margin-bottom:10px}
.lform__ok p{color:var(--on-light-mut);font-size:15px;max-width:42ch;margin-inline:auto;line-height:1.6}
.fieldgroup__lbl{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-light-mut);font-weight:600;margin-bottom:9px;display:block}

/* collapsible optional field (progressive disclosure — keeps the form short) */
.field-collapse{margin-bottom:14px}
.field-collapse>summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--red);font-weight:600;padding:2px 0}
.field-collapse>summary::-webkit-details-marker{display:none}
.field-collapse>summary::before{content:"+";font-size:14px;line-height:1;color:var(--red)}
.field-collapse[open]>summary::before{content:"\2212"}
.field-collapse[open]>summary{margin-bottom:2px}

/* two-column form-with-aside layout */
.formlayout{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,64px);align-items:start}
.whycard{background:var(--card);border:1px solid var(--hair);border-radius:var(--r);padding:16px 18px;margin-bottom:10px;display:flex;gap:14px;align-items:center}
.whycard__ic{width:36px;height:36px;border-radius:10px;background:var(--paper-2);display:flex;align-items:center;justify-content:center;font-size:18px;flex:none}
.whycard h4{font-size:15px;font-weight:700;color:var(--on-light);margin-bottom:3px;letter-spacing:-.01em}
.whycard p{font-size:13px;color:var(--on-light-mut);line-height:1.5}

/* ---------------- ZBS FLOW DIAGRAM ---------------- */
.flow{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:0;align-items:stretch;
  background:var(--card);border:1px solid var(--hair);border-radius:var(--r);overflow:hidden}
.flow__step{position:relative;padding:26px 22px;border-right:1px solid var(--hair)}
.flow__step:last-child{border-right:0}
.flow__no{width:34px;height:34px;border-radius:50%;background:var(--paper-2);display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:12px;font-weight:700;color:var(--on-light);margin-bottom:16px}
.flow__step:last-child .flow__no{background:var(--red);color:#fff}
.flow__step h5{font-size:14.5px;font-weight:700;color:var(--on-light);letter-spacing:-.01em;margin-bottom:6px}
.flow__step p{font-size:13px;color:var(--on-light-mut);line-height:1.5}
.flow__step::after{content:"→";position:absolute;top:34px;right:-9px;z-index:2;color:var(--red);font-size:15px;background:var(--card);padding:0 2px}
.flow__step:last-child::after{display:none}

/* ---------------- PRODUCT CARDS (STIM / LIFT) ---------------- */
.pcards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pcard{background:var(--card);border:1px solid var(--hair);border-radius:var(--r-lg);overflow:hidden;display:flex;flex-direction:column}
.pcard__top{position:relative;padding:30px 30px 22px;background:linear-gradient(180deg,#0c0f15,#11151d);color:var(--on-dark)}
.pcard__role{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--signal);font-weight:600}
.pcard__top h3{font-size:30px;font-weight:200;letter-spacing:-.01em;margin:8px 0 4px}
.pcard__top h3 b{font-weight:700}
.pcard__top p{font-size:13.5px;color:var(--on-dark-mut);line-height:1.5;max-width:38ch}
.pcard__photo{position:absolute;right:20px;bottom:-30px;width:120px;pointer-events:none;filter:drop-shadow(0 20px 30px rgba(0,0,0,.5))}
.pcard__body{padding:28px 30px 30px;display:flex;flex-direction:column;gap:18px;flex:1}
.pcard__specs{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--hair);border:1px solid var(--hair);border-radius:12px;overflow:hidden}
.pcard__specs div{background:var(--card);padding:14px 16px}
.pcard__specs dt{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--on-light-faint);margin-bottom:5px}
.pcard__specs dd{font-size:15px;font-weight:700;color:var(--on-light);letter-spacing:-.01em}
.pcard__specs dd .u{font-size:11px;font-weight:500;color:var(--on-light-mut)}
.pcard__chips{display:flex;flex-wrap:wrap;gap:8px}
.pcard__desc{font-size:14.5px;line-height:1.62;color:var(--on-light-mut)}
.pcard__desc b{color:var(--on-light);font-weight:600}
.pcard__cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:auto}
.chip-light{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;padding:7px 12px;border-radius:100px;color:var(--on-light-mut);border:1px solid var(--hair);background:var(--paper)}
.chip-light .d{width:5px;height:5px;border-radius:50%;background:var(--red);flex:none}

/* ---------------- VIEW MORE ---------------- */
.more-body{max-height:0;overflow:hidden;transition:max-height .5s var(--ease)}
.more-body.open{max-height:2400px}
.more-btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;
  text-transform:uppercase;font-weight:600;color:var(--red);margin-top:18px}
.more-btn .ar{transition:transform .3s}
.more-btn.open .ar{transform:rotate(180deg)}
@media(max-width:480px){
  .more-btn{white-space:normal;max-width:100%}
  .more-btn .lbl{white-space:normal}
}

/* ---------------- IN-PAGE STICKY SUBNAV ---------------- */
.subnav{position:sticky;top:60px;z-index:40;background:rgba(248,249,251,.9);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--hair)}
.subnav__in{display:flex;gap:4px;overflow-x:auto;padding:12px var(--pad);max-width:var(--wrap);margin-inline:auto;scrollbar-width:none}
.subnav__in::-webkit-scrollbar{display:none}
.subnav a{white-space:nowrap;padding:8px 15px;border-radius:100px;font-size:13px;font-weight:600;color:var(--on-light-mut);transition:.25s}
.subnav a:hover,.subnav a.on{background:#0d1017;color:#fff}

/* ---------------- SONICATION WAVE MOTIF ---------------- */
.wavebox{position:relative;background:linear-gradient(180deg,#0c0f15,#11151d);border-radius:var(--r-lg);
  padding:38px;overflow:hidden;color:var(--on-dark)}
.wavebox svg{width:100%;height:160px;display:block}
.wavebox .wv{fill:none;stroke:var(--signal);stroke-width:1.4;opacity:.7}
.wavebox__cap{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--on-dark-mut);margin-top:14px;text-align:center}
@media(prefers-reduced-motion:no-preference){
  .wavebox .wv{animation:wvmove 4s var(--ease) infinite alternate}
  .wavebox .wv:nth-child(2){animation-delay:.4s;opacity:.4}
  .wavebox .wv:nth-child(3){animation-delay:.8s;opacity:.22}
}
@keyframes wvmove{to{transform:translateY(-6px) scaleY(.7)}}

/* image placeholder (light) */
.imgph{position:relative;border-radius:var(--r);overflow:hidden;background:
  repeating-linear-gradient(135deg,var(--paper-2) 0 10px,#e7e9ee 10px 20px);
  border:1px solid var(--hair);display:flex;align-items:center;justify-content:center;min-height:220px}
.imgph span{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-light-faint);
  background:rgba(255,255,255,.7);padding:7px 14px;border-radius:100px}
.imgfill{border-radius:var(--r);overflow:hidden;background-size:cover;background-position:center;border:1px solid var(--hair)}

/* generic light callout */
.callout{background:var(--card);border:1px solid var(--hair);border-left:3px solid var(--red);border-radius:12px;
  padding:20px 24px;font-size:14.5px;line-height:1.6;color:var(--on-light-mut)}
.callout b{color:var(--on-light);font-weight:600}

/* two-up feature row */
.feature{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,60px);align-items:center}
.feature--one-col{display:grid;grid-template-columns:.60fr 1.32fr;gap:clamp(28px,4vw,60px);}
.feature--rev .feature__media{order:2}

/* final light CTA band */
.ctaband{background:linear-gradient(180deg,#0c0f15,#11151d);color:var(--on-dark);border-radius:var(--r-lg);
  padding:clamp(40px,5vw,64px);text-align:center;position:relative;overflow:hidden}
.ctaband h2{font-size:var(--t-lg);font-weight:200;letter-spacing:-.02em;line-height:1.05;max-width:22ch;margin-inline:auto}
.ctaband h2 b{font-weight:700}
.ctaband p{color:var(--on-dark-mut);font-size:var(--lede);margin:16px auto 0;max-width:52ch;line-height:1.6}
.ctaband__cta{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:30px}
/* ghost CTA sits on the dark band → needs light outline/text to stay visible */
.ctaband .btn--ghost{--fg:#eef2f8;--bd:rgba(207,219,240,.34);background:rgba(8,10,14,.28)}
.ctaband .btn--ghost:hover{--bd:rgba(207,219,240,.6);background:rgba(8,10,14,.5)}

/* ---------------- PRODUCTS ON A LIGHT SECTION (shared .prod showcase) ----------------
   The .prod showcase (sections.css) is dark-designed; these overrides let it
   render correctly on any .sec-light page (e.g. Tổng quan). isolation:isolate
   keeps the z-index:-1 glow/rings from vanishing behind the opaque light bg. */
.sec-light .prod{isolation:isolate}
.sec-light .prod h3{color:var(--on-light)}
.sec-light .prod--stim{--ac:#2f6fd0;--acglow:rgba(47,111,208,.20)}
.sec-light .prod--lift{--ac:var(--red);--acglow:rgba(204,31,60,.16)}
.sec-light .prod__glow{opacity:.8;filter:blur(34px)}
.sec-light .prod__rings{opacity:.85}
.sec-light .prod__rings .ring{stroke:var(--ac);stroke-width:.9;opacity:.5}
.sec-light .prod__role{color:var(--ac)}
.sec-light .prod__specs div{border-bottom-color:var(--hair)}
.sec-light .prod__specs dt{color:var(--on-light-mut)}
.sec-light .prod__specs dd{color:var(--on-light)}
.sec-light .prod__specs dd .num{color:var(--ac)}
.sec-light .prod__desc{color:var(--on-light-mut)}
.sec-light .prod__desc .kw{color:var(--on-light);font-weight:600}
.sec-light .prod__chips .chip{background:var(--paper);
  border-color:color-mix(in srgb,var(--ac) 42%,transparent);
  color:color-mix(in srgb,var(--ac) 82%,#0a0d12)}
.sec-light .prod__chips .chip .d{background:var(--ac)}
.sec-light .prod .btn--solid{--bg:#12151b;--fg:#fff;--bd:transparent}
.sec-light .prod .btn--solid:hover{--bg:#20242e}
.sec-light .split__line{background:linear-gradient(180deg,var(--hair-2),var(--hair) 30%,transparent)}
.sec-light .split__node svg g{stroke:var(--on-light-faint)}
.sec-light .split__node svg circle{fill:var(--on-light)}

/* ---------------- PRODUCT SHOWCASE base (.split / .prods / .prod) ----------------
   Moved here from sections.css so light child pages can use the homepage product
   showcase WITHOUT pulling in sections.css's feathered transparent .sec-light
   gradient (which was clobbering the solid paper/white/paper2 section tones). */
.split{position:relative;margin-top:clamp(40px,6vw,76px)}
.split--no-margin{position:relative}
.split__line{position:absolute;left:50%;top:-10px;bottom:30px;width:1px;transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(207,224,246,.5),rgba(207,224,246,.12) 30%,transparent);z-index:1}
.split__node{position:absolute;left:50%;top:-22px;transform:translateX(-50%);width:30px;height:30px;z-index:2}
.split__node svg{width:100%;height:100%;overflow:visible}
.prods{display:grid;grid-template-columns:1fr 1fr;gap:0}
.prod{position:relative;padding:clamp(26px,3vw,42px) clamp(20px,3vw,48px);display:flex;flex-direction:column;align-items:center;text-align:center}
.prod--stim{--ac:#6ea6f0;--acglow:rgba(110,166,240,.3)}
.prod--lift{--ac:var(--red-soft);--acglow:rgba(224,86,110,.28)}
.prod__glow{position:absolute;left:50%;top:24%;width:90%;height:60%;transform:translate(-50%,-50%);z-index:-1;
  background:radial-gradient(ellipse 50% 50% at 50% 50%,var(--acglow),transparent 68%);filter:blur(20px);opacity:.7}
.prod__role{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ac);margin-bottom:4px}
.prod h3{font-size:clamp(26px,3vw,40px);font-weight:200;color:#fff;letter-spacing:-.01em}
.prod h3 b{font-weight:600}
.prod__stage{position:relative;width:clamp(170px,17vw,220px);height:clamp(320px,34vw,440px);margin:20px auto 10px;display:flex;align-items:center;justify-content:center}
.prod__photo{width:100%;height:100%;object-fit:contain;object-position:center;
  filter:drop-shadow(0 30px 42px rgba(0,0,0,.6));transition:transform .6s var(--ease),filter .6s}
.prod:hover .prod__photo{transform:translateY(-6px) scale(1.02);filter:drop-shadow(0 40px 54px rgba(0,0,0,.68))}
.prod__rings{position:absolute;inset:-12% -30%;z-index:-1;opacity:.5}
.prod__rings svg{width:100%;height:100%;overflow:visible}
.prod__rings .ring{fill:none;stroke:var(--ac);stroke-width:.5;opacity:.4}
.prod__chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:10px 0 18px}
.prod__chips .chip{border-color:color-mix(in srgb,var(--ac) 40%,transparent);color:color-mix(in srgb,var(--ac) 75%,white)}
.prod__chips .chip .d{background:var(--ac)}
.prod__specs{width:100%;max-width:340px;display:flex;flex-direction:column;gap:0;margin-bottom:18px}
.prod__specs div{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:11px 2px;border-bottom:1px solid var(--line-dark);text-align:left}
.prod__specs dt{font-size:12.5px;color:var(--on-dark-mut)}
.prod__specs dd{font-family:var(--mono);font-size:12.5px;color:var(--on-dark)}
.prod__specs dd .num{color:var(--ac);font-weight:600}
.prod__desc{font-size:13.5px;color:var(--on-dark-mut);line-height:1.6;max-width:38ch;margin-bottom:20px}
.prod__cta{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.prod__cta2{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;z-index: 100;margin-top: -15%;}
@media(max-width:760px){
  .prods{grid-template-columns:1fr;gap:30px}
  .split__line,.split__node{display:none}
  .prod{border-bottom:1px solid var(--hair);padding-bottom:40px}
  .prod--lift{border-bottom:0}
}

.nav__links>a.active,.nav__trigger.active{color:var(--on-dark);background:rgba(207,219,240,.08)}
.nav.on-light .nav__links>a.active,.nav.on-light .nav__trigger.active{color:var(--on-light);background:rgba(20,28,45,.06)}

/* ---------------- MEGA MENU (Khám phá Acurhyal) ---------------- */
.navdd__panel--mega{min-width:min(680px,90vw);padding:14px;
  display:grid;grid-template-columns:1fr 1fr;gap:6px}
.navdd__panel--mega .mega__i{display:flex;flex-direction:column;gap:3px;padding:13px 15px;border-radius:12px;transition:.22s}
.navdd__panel--mega .mega__i b{font-size:14px;font-weight:600;color:var(--on-dark)}
.navdd__panel--mega .mega__i span{font-size:12px;color:var(--on-dark-faint);line-height:1.4}
.nav.on-light .navdd__panel--mega .mega__i b{color:var(--on-light)}
.nav.on-light .navdd__panel--mega .mega__i span{color:var(--on-light-faint)}
.navdd__panel--mega .mega__i:hover b{color:var(--red)}

/* ---------------- responsive ---------------- */
@media(max-width:900px){
  .pillars{grid-template-columns:1fr}
  .pcards{grid-template-columns:1fr}
  .formlayout{grid-template-columns:1fr}
  .feature{grid-template-columns:1fr;gap:26px}
  .feature--rev .feature__media{order:0}
  .flow{grid-auto-flow:row;grid-auto-columns:auto}
  .flow__step{border-right:0;border-bottom:1px solid var(--hair)}
  .flow__step:last-child{border-bottom:0}
  .flow__step::after{content:"↓";top:auto;bottom:-9px;right:auto;left:26px}
  .navdd__panel--mega{grid-template-columns:1fr}
}
@media(max-width:640px){
  .lform__grid{grid-template-columns:1fr}
  .pcard__specs{grid-template-columns:1fr}
  .phero h1{font-size:clamp(30px,9vw,44px)}
  /* comparison table → stacked */
  .ctable,.ctable thead,.ctable tbody,.ctable tr,.ctable th,.ctable td{display:block}
  .ctable thead{display:none}
  .ctable tr{border-bottom:8px solid var(--paper);}
  .ctable .rowlbl{background:var(--paper-2);width:auto;font-size:12px;text-transform:uppercase;letter-spacing:.08em}
  .ctable td{border-bottom:1px solid var(--hair)}
  .ctable td.acu::before{content:"Acurhyal — ";color:var(--red);font-weight:700}
}

/* ===== css/pages/home-light.css ===== */
/* ============================================================
   ACURHYAL · home-light.css
   Light-content revision overrides for index.html. The hero (#top), brand
   intro (#reveal) and pinned precision story (#difference) stay DARK as the
   "hero experience"; the content sections below (#needs, #products, #clinical,
   #training, final CTA) are converted to the light editorial system.
   Loaded LAST so it authoritatively overrides sections.css / precision-story.
   ============================================================ */

/* solid light ground for the converted sections (override feathered gradient) */
#needs.sec-light,#products.sec-light,#clinical.sec-light,#training.sec-light,.finalx.sec-light{
  background:var(--paper)!important;color:var(--on-light)}
#products.sec-light{background:var(--card)!important}
#training.sec-light{background:var(--paper-2)!important}

/* section heads / scene labels / serif accent on light */
.sec-light .scene__no{color:var(--red)}
.sec-light .scene__name{color:var(--on-light-mut)}
.sec-light .h-xl,.sec-light .h-lg,.sec-light .display,.sec-light .finalx__h{color:var(--on-light)}
.sec-light .serif{font-style:normal;color:var(--red)}

/* seams sitting over light sections → dark hairline + dark node */
#needs.sec-light+.seam .seam__line,#products.sec-light+.seam .seam__line,#clinical.sec-light+.seam .seam__line{
  background:linear-gradient(90deg,transparent,rgba(20,28,45,.16) 30%,rgba(20,28,45,.16) 70%,transparent)}

/* ---------------- NEEDS ---------------- */
.sec-light .need{background:var(--card);border-color:var(--hair)}
.sec-light .need:hover{box-shadow:0 30px 70px -40px rgba(20,28,45,.45);border-color:var(--hair-2)}
.sec-light .need__img::after{display:none}
.sec-light .need__b{margin-top:0;padding-top:18px}
.sec-light .need__b h3{color:var(--on-light)}
.sec-light .need__b .vn{color:var(--on-light-mut)}
.sec-light .need__b li{color:var(--on-light-mut)}
.sec-light .need__b li::before{background:var(--on-light-faint)}

/* ---------------- PRODUCTS ---------------- */
.sec-light .prod h3{color:var(--on-light)}
.sec-light .prod__specs div{border-bottom-color:var(--hair)}
.sec-light .prod__specs dt{color:var(--on-light-mut)}
.sec-light .prod__specs dd{color:var(--on-light)}
.sec-light .prod__desc{color:var(--on-light-mut)}
.sec-light .split__line{background:linear-gradient(180deg,var(--hair-2),var(--hair) 30%,transparent)}
.sec-light .split__node svg g{stroke:var(--on-light-faint)!important}
.sec-light .split__node svg circle{fill:var(--on-light)!important}
.sec-light .prod__chips .chip{background:var(--paper)}

/* ---------------- CLINICAL ---------------- */
.sec-light .cfeat{background:var(--card);border-color:var(--hair)}
.sec-light .cfeat:hover{box-shadow:0 30px 70px -40px rgba(20,28,45,.45);border-color:var(--hair-2)}
.sec-light .cfeat h4{color:var(--on-light)}
.sec-light .cfeat p{color:var(--on-light-mut)}
.sec-light .clin__band{background:var(--card);border-color:var(--hair)}
.sec-light .clin__stats b{color:var(--on-light)}
.sec-light .clin__stats b i{color:var(--on-light-mut)}
.sec-light .clin__stats span{color:var(--on-light-faint)}
.sec-light .clin__band-b p{color:var(--on-light-mut)}
.sec-light .clin__ba-h h5{color:var(--on-light)}
.sec-light .clin__ba-h span{color:var(--on-light-faint)}
.sec-light .ba{background:var(--card);border-color:var(--hair)}
.sec-light .ba__cap h4{color:var(--on-light)}
.sec-light .ba__cap p{color:var(--on-light-mut)}
.sec-light .ba__tag{background:var(--paper-2);border-color:var(--hair)}

/* ---------------- TRAINING ---------------- */
.sec-light .sched{background:var(--card);border-color:var(--hair)}
.sec-light .sched__h h4{color:var(--on-light)}
.sec-light .ev{border-top-color:var(--hair)}
.sec-light .ev__b h5{color:var(--on-light)}
.sec-light .ev__b p{color:var(--on-light-mut)}
.sec-light .lnk{color:var(--on-light-mut)}
.sec-light .lnk:hover{color:var(--on-light)}
.sec-light .res{background:var(--card);border-color:var(--hair)}
.sec-light .res:hover{background:var(--card);border-color:var(--hair-2);box-shadow:0 24px 60px -40px rgba(20,28,45,.4)}
.sec-light .res__type{color:var(--red)}
.sec-light .res h4{color:var(--on-light)}
.sec-light .res p{color:var(--on-light-mut)}
.sec-light .res .dl{color:var(--red)}

/* ---------------- FINAL CTA ---------------- */
.finalx.sec-light .finalx__sub{color:var(--on-light-mut)}
.finalx.sec-light .finalx__note{color:var(--on-light-faint)}
.finalx.sec-light .finalx__h .serif{font-style:normal;color:var(--red)}
.finalx.sec-light .finalx__orbit .ring{stroke:rgba(20,28,45,.12)}
/* decorative orbit bleeds past the viewport → clip the section (scoped, never
   html/body, so pinned sticky stories keep working). */
.finalx{overflow-x:clip}

/* ===== css/pages/home-content-structure-option.css ===== */
/* ============================================================
   ACURHYAL · home-content-structure-option.css
   Page-specific ADDITIONS for
   index-home-option-content-structure.html
   (a NEW homepage option — approved index.html is untouched).

   This file only adds ONE small, in-system component:
     .nat3  — the "Tự nhiên từ thành phần đến kết quả" 3-benefit trio,
              used inside the existing LIGHT "Từ khoa học đến làn da"
              section as a scannable lead-in.
   It reuses the existing design tokens (--card / --hair / --red /
   --mono / --r) so it reads as the current system, NOT a new
   visual direction. Nothing here overrides the approved homepage.
   Plus a tiny helper to center proof chips inside the dark reveal.
   ============================================================ */

/* proof chips inside the dark USP reveal (reuses global .chip) */
.rvx__chips{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:6px}

/* ---- 3 natural benefits (thành phần → tăng sinh → kết quả) ---- */
.nat3-head{margin:0 0 20px}
.nat3-head .nat3-k{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);
  font-size:11px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--red)}
.nat3-head .nat3-k::before{content:"";width:22px;height:1px;background:var(--red);opacity:.6}
.nat3-head h3{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:-.02em;
  color:var(--on-light);margin:12px 0 0;line-height:1.12}
.nat3-head h3 .em{color:var(--red)}

.nat3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.nat3 .n{position:relative;background:var(--card);border:1px solid var(--hair);border-radius:var(--r);
  padding:26px 24px;overflow:hidden;transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .3s}
.nat3 .n:hover{transform:translateY(-4px);box-shadow:0 28px 64px -46px rgba(20,28,45,.5);border-color:var(--hair-2,rgba(20,28,45,.16))}
.nat3 .n__no{font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--red)}
.nat3 .n h4{font-size:19px;font-weight:700;letter-spacing:-.01em;color:var(--on-light);line-height:1.16;margin:14px 0 0}
.nat3 .n p{font-size:14.5px;line-height:1.6;color:var(--on-light-mut);margin:11px 0 0}
.nat3 .n p b{color:var(--on-light);font-weight:600}
.nat3 .n__sub{display:inline-flex;align-items:center;margin-top:15px;padding:8px 14px;border-radius:100px;
  background:var(--paper-2,rgba(20,28,45,.04));border:1px solid var(--hair);
  font-size:12.5px;font-weight:500;color:var(--on-light-mut)}
.nat3 .n__sub::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red);margin-right:9px;flex:none}

/* natural flow ribbon under the trio */
.nat3-flow{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:22px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-light-mut)}
.nat3-flow b{color:var(--on-light);font-weight:600}
.nat3-flow .ar{color:var(--red)}

/* bridge CTA row for the "Từ khoa học đến làn da" section */
.needs-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(28px,3.4vw,40px)}

@media(max-width:900px){ .nat3{grid-template-columns:1fr} }

/* ===== css/pages/home-natural-storytelling-v5.css ===== */
/* ============================================================
   ACURHYAL · home-natural-storytelling.css
   Page-specific styles for index-home-option-natural-storytelling.html
   (a NEW option — approved index.html + the two earlier options are
   untouched).

   Adds ONE storytelling module: the pinned "Tự nhiên" scroll story for
   the "Từ khoa học đến làn da" section. The keyword "Tự nhiên" stays
   anchored on the left while the right-side step content swaps as the
   user scrolls (Thành phần → Tăng sinh → Kết quả → Từ khoa học đến làn da).
   Built entirely on existing tokens (--serif / --mono / --red / --card /
   --hair / --on-light…) so it reads as the current premium-scientific
   system, not a new visual direction. Mobile (<=920w / <=640h) falls
   back to a clean stacked timeline — no pinning.
   ============================================================ */

.natstory{position:relative}

/* ---- pinned track / sticky stage ---- */
.ns__track{position:relative;height:300vh}
.ns__stage{position:sticky;top:0;height:100vh;min-height:600px;overflow:hidden;
  display:flex;flex-direction:column;justify-content:center;
  padding:clamp(84px,12vh,128px) 0 clamp(30px,5vh,54px)}
/* soft directional glow behind the anchor word (atmosphere, in-system) */
.ns__stage::before{content:"";position:absolute;left:-6%;top:50%;transform:translateY(-50%);
  width:52%;height:78%;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse 60% 56% at 40% 48%, rgba(224,86,110,.10), rgba(224,86,110,.03) 46%, transparent 72%)}

.ns__grid{position:relative;z-index:1;display:grid;grid-template-columns:0.92fr 1.08fr;
  gap:clamp(32px,5vw,84px);align-items:center;flex:1;min-height:0}

/* ---- anchored keyword ---- */
.ns__anchor{position:relative}
.ns__eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);
  font-size:11px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--red);margin-bottom:18px}
.ns__eyebrow .d{width:6px;height:6px;border-radius:50%;background:var(--red);flex:none}
.ns__word{font-family:var(--serif);font-weight:300;font-size:clamp(66px,10.5vw,158px);line-height:.9;
  letter-spacing:-.03em;color:var(--on-light);margin:0}
.ns__word .ns__pt{color:var(--red)}
.ns__qual{position:relative;height:1.6em;margin-top:16px}
.ns__q{position:absolute;left:0;top:0;font-family:var(--mono);font-size:clamp(13px,1.35vw,17px);
  font-weight:500;letter-spacing:.05em;color:var(--on-light-mut);white-space:nowrap;
  opacity:0;transform:translateY(9px);transition:opacity .5s var(--ease),transform .55s var(--ease)}
.ns__q.on{opacity:1;transform:none}
.ns__q b{color:var(--red);font-weight:600}
/* subtle rotating orbit behind the word */
.ns__orbit{position:absolute;left:38%;top:44%;transform:translate(-50%,-50%);width:min(46vw,420px);
  aspect-ratio:1;z-index:-1;pointer-events:none;opacity:.5}
.ns__orbit svg{width:100%;height:100%}
.ns__orbit .ring{fill:none;stroke:rgba(20,28,45,.10);stroke-width:.4}
.ns__orbit .cnode{fill:var(--red)}
@media(prefers-reduced-motion:no-preference){.natstory.armed .ns__orbit svg{animation:nsSpin 64s linear infinite;transform-origin:50% 50%}}
@keyframes nsSpin{to{transform:rotate(360deg)}}

/* ---- swapping steps ---- */
.ns__steps{position:relative;height:min(58vh,460px)}
.nstep{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(26px);
  transition:opacity .55s var(--ease),transform .7s var(--ease),visibility .55s}
.nstep.on{opacity:1;visibility:visible;transform:none}
.nstep__no{font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.2em;
  text-transform:uppercase;color:var(--red);margin-bottom:16px}
.nstep__h{font-family:var(--serif);font-weight:500;font-size:clamp(30px,4vw,52px);line-height:1.04;
  letter-spacing:-.02em;color:var(--on-light);margin:0}
.nstep__p{font-size:clamp(16px,1.5vw,20px);line-height:1.55;color:var(--on-light-mut);
  max-width:44ch;margin:20px 0 0;text-wrap:pretty}
.nstep__p b{color:var(--on-light);font-weight:600}
.nstep__sub{display:inline-flex;align-items:center;margin-top:20px;padding:10px 16px;border-radius:100px;
  background:var(--card);border:1px solid var(--hair);font-size:13.5px;font-weight:500;color:var(--on-light-mut);width:fit-content}
.nstep__sub::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red);margin-right:10px;flex:none}

/* step 4 — bridge to application */
.nstep__bridge{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.nstep__bridge span{display:inline-flex;align-items:center;padding:9px 15px;border-radius:100px;
  background:var(--card);border:1px solid var(--hair);font-size:13px;font-weight:500;color:var(--on-light);
  font-family:var(--mono);letter-spacing:.02em}
.nstep__bridge span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--red);margin-right:9px}
.nstep__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---- timeline ---- */
.ns__timeline{position:relative;z-index:1;flex:none}
.ns__timeline-in{display:flex;flex-direction:column;gap:14px}
.ns__progress{position:relative;height:2px;background:var(--hair);border-radius:2px;overflow:hidden}
.ns__progress-fill{position:absolute;left:0;top:0;bottom:0;width:100%;background:var(--red);
  transform:scaleX(var(--nsp,0));transform-origin:left;transition:transform .12s linear}
.ns__dots{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.ns__navbtn{display:none}
.ns__dotbtn{display:flex;align-items:center;gap:10px;background:none;border:none;cursor:pointer;
  padding:6px 0;text-align:left;font-family:var(--mono);font-size:11.5px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;color:var(--on-light-faint);transition:color .3s}
.ns__dotbtn .ns__dot2{width:9px;height:9px;border-radius:50%;border:1.5px solid var(--hair-2,rgba(20,28,45,.2));
  background:transparent;flex:none;transition:background .3s,border-color .3s,transform .3s}
.ns__dotbtn.done .ns__dot2{background:var(--on-light-faint);border-color:var(--on-light-faint)}
.ns__dotbtn.on{color:var(--red)}
.ns__dotbtn.on .ns__dot2{background:var(--red);border-color:var(--red);transform:scale(1.15);box-shadow:0 0 0 4px rgba(224,86,110,.14)}

/* ---- entrance arm ---- */
@media(prefers-reduced-motion:no-preference){
  .natstory.armed .nstep.on .nstep__no{animation:nsUp .6s var(--ease) both}
  .natstory.armed .nstep.on .nstep__h{animation:nsUp .7s var(--ease) .06s both}
  .natstory.armed .nstep.on .nstep__p{animation:nsUp .7s var(--ease) .12s both}
  .natstory.armed .nstep.on .nstep__sub,
  .natstory.armed .nstep.on .nstep__bridge,
  .natstory.armed .nstep.on .nstep__cta{animation:nsUp .7s var(--ease) .18s both}
}
@keyframes nsUp{from{opacity:0;transform:translateY(18px)}}

/* ---- skin-need payoff head ---- */
.ns__needshead{margin-top:clamp(20px,4vh,44px)}
.ns__needshead .scene__name{color:var(--on-light)}

/* ---- transition connector into "Tín hiệu chính xác" ---- */
.natstory-outro{background:var(--paper,#f6f7f9);text-align:center;padding:clamp(44px,7vh,84px) var(--pad)}
.natstory-outro__in{max-width:760px;margin:0 auto}
.natstory-outro__k{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:11px;
  font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--red);margin-bottom:16px}
.natstory-outro p{font-family:var(--serif);font-weight:500;font-size:clamp(21px,2.6vw,32px);line-height:1.25;
  letter-spacing:-.015em;color:var(--on-light);margin:0;text-wrap:balance}
.natstory-outro p b{color:var(--red);font-weight:500}
.natstory-outro__ar{display:block;margin:22px auto 0;font-size:22px;color:var(--red);line-height:1}

/* ============================================================
   MOBILE / SHORT-VIEWPORT FALLBACK — no pinning, clean stacked timeline
   ============================================================ */
@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .ns__track{height:auto!important}
  .ns__stage{position:static;height:auto!important;min-height:0;display:block;overflow:visible;padding:clamp(56px,9vh,84px) 0 0}
  .ns__stage::before{display:none}
  .ns__grid{grid-template-columns:1fr;gap:clamp(22px,5vw,34px);align-items:start}
  .ns__anchor{position:sticky;top:64px;z-index:2;padding-bottom:12px;background:linear-gradient(180deg,var(--paper,#f6f7f9) 72%,transparent)}
  .ns__word{font-size:clamp(52px,17vw,96px)}
  .ns__qual{display:none}
  .ns__orbit{display:none}
  .ns__steps{position:static;height:auto}
  .nstep{position:relative;inset:auto;opacity:1;visibility:visible;transform:none;
    justify-content:flex-start;padding:clamp(26px,6vw,38px) 0;border-top:1px solid var(--hair)}
  .nstep:first-child{border-top:none;padding-top:8px}
  .nstep__p{max-width:none}
  .ns__timeline{display:none}
}


/* ============================================================
   v2 ADDITIONS — fixed "Tự nhiên" + animated suffix, per-step graphics,
   6-petal orbit tone, standardized RED primary buttons.
   ============================================================ */

/* v5 · BUTTON HIERARCHY RESTORED — red is reserved for conversion CTAs
   (.btn--red: nav Báo giá/Trial, floating Nhận báo giá, final Nhận tư vấn,
   form submit). .btn--solid keeps its design-system tone (dark on light
   sections / light on dark sections) and .btn--ghost stays outline — so a
   single viewport is never flooded with red. */
.btn--red:active{--bg:#b31734}

/* fixed word + animated suffix lockup */
.natstory--v2 .ns__lockup{position:relative}
.natstory--v2 .ns__suffix{position:relative;height:1.2em;margin-top:10px;overflow:hidden}
.natstory--v2 .ns__sfx{position:absolute;left:0;top:0;font-family:var(--serif);font-weight:700;
  font-size:clamp(26px,3.6vw,50px);line-height:1.14;letter-spacing:-.02em;color:var(--red);white-space:nowrap;
  opacity:0;transform:translateY(.55em);transition:opacity .55s var(--ease),transform .62s var(--ease)}
.natstory--v2 .ns__sfx.on{opacity:1;transform:none}
.natstory--v2 .ns__stepno{margin-top:26px;font-family:var(--mono);font-size:12.5px;letter-spacing:.16em;color:var(--on-light-faint)}
.natstory--v2 .ns__stepno-cur{color:var(--red);font-weight:700;font-size:16px}

/* per-step graphics */
.nstep__viz{width:100%;max-width:360px;margin-bottom:24px;color:var(--on-light-faint)}
.nstep__viz svg{width:100%;height:auto;display:block}
@media(prefers-reduced-motion:no-preference){
  .natstory.armed .nstep.on .nstep__viz{animation:nsUp .7s var(--ease) both}
}

/* mobile per-step label (desktop uses the animated suffix instead) */
.nstep__mlabel{display:none;font-family:var(--serif);font-weight:700;font-size:clamp(21px,6vw,26px);
  color:var(--red);letter-spacing:-.01em;margin-bottom:12px}
.nstep__mlabel::before{content:"Tự nhiên ";color:var(--on-light)}

@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .natstory--v2 .ns__suffix,.natstory--v2 .ns__stepno{display:none}
  .nstep__mlabel{display:block}
  .nstep__viz{max-width:300px}
}


/* ============================================================
   v3 OVERRIDES — CENTERED, balanced composition for "Từ khoa học đến làn da".
   Fixes: left-heavy layout, clipped/covered suffix. Suffix now has generous
   line-height + min-height (NO overflow-hidden clipping of Vietnamese
   diacritics); graphic sits ABOVE the centered text so it never covers it.
   ============================================================ */
.natstory--v3 .ns__stage{justify-content:center;padding:clamp(88px,12vh,132px) 0 clamp(34px,6vh,64px)}
.natstory--v3 .ns__stage::before{left:50%;transform:translate(-50%,-50%);width:min(70vw,760px);height:70%;
  background:radial-gradient(ellipse 60% 56% at 50% 46%, rgba(224,86,110,.09), rgba(224,86,110,.03) 46%, transparent 72%)}

.natstory--v3 .ns__center{position:relative;z-index:1;max-width:940px;margin:0 auto;padding:0 var(--pad);
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  flex:1;min-height:0;gap:clamp(6px,1.4vh,16px)}
.natstory--v3 .ns__eyebrow{justify-content:center;margin-bottom:4px}

/* faint centered orbit behind the word (6-petal, no dot) */
.natstory--v3 .ns__orbit{position:absolute;left:50%;top:52%;transform:translate(-50%,-50%);
  width:min(58vw,540px);aspect-ratio:1;z-index:-1;pointer-events:none;opacity:.6}
.natstory--v3 .ns__orbit svg{width:100%;height:100%}
@media(prefers-reduced-motion:no-preference){.natstory--v3.armed .ns__orbit svg{animation:nsSpin 80s linear infinite;transform-origin:50% 50%}}

/* lockup: fixed word + animated suffix, centered, NO clipping */
.natstory--v3 .ns__lockup{position:relative;width:100%}
.natstory--v3 .ns__word{font-size:clamp(52px,8vw,116px);line-height:1.02;letter-spacing:-.03em;margin:0;padding-bottom:.04em}
.natstory--v3 .ns__suffix{position:relative;min-height:clamp(38px,4.8vw,70px);margin-top:8px}
.natstory--v3 .ns__sfx{position:absolute;left:0;right:0;top:0;text-align:center;
  font-family:var(--serif);font-weight:700;font-size:clamp(23px,3.3vw,44px);line-height:1.32;letter-spacing:-.018em;
  color:var(--red);padding-bottom:.16em;
  opacity:0;transform:translateY(.42em);transition:opacity .5s var(--ease),transform .55s var(--ease)}
.natstory--v3 .ns__sfx.on{opacity:1;transform:none}

/* centered swapping steps — graphic above text, generous room */
.natstory--v3 .ns__steps{position:relative;width:100%;max-width:660px;margin:clamp(16px,2.6vh,30px) auto 0;height:min(42vh,330px)}
.natstory--v3 .nstep{align-items:center;text-align:center}
.natstory--v3 .nstep__viz{margin:0 auto 20px;max-width:320px;color:var(--on-light-faint)}
.natstory--v3 .nstep__p{margin:0 auto;max-width:50ch}
.natstory--v3 .nstep__sub{margin:18px auto 0}

/* centered timeline */
.natstory--v3 .ns__timeline{flex:none;width:100%;max-width:420px;margin:0 auto}
.natstory--v3 .ns__timeline-in{gap:14px}
.natstory--v3 .ns__dots{grid-template-columns:repeat(3,auto);justify-content:center;gap:22px}
.natstory--v3 .ns__dotbtn{padding:6px 0}
.natstory--v3 .nstep__mlabel::before{content:none}

/* ---- mobile: centered anchor + stacked cards, no clip/overlap ---- */
@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .natstory--v3 .ns__stage{justify-content:flex-start}
  .natstory--v3 .ns__center{justify-content:flex-start;gap:14px}
  .natstory--v3 .ns__suffix{display:none}
  .natstory--v3 .ns__orbit{display:none}
  .natstory--v3 .ns__word{position:sticky;top:60px;z-index:2;font-size:clamp(48px,15vw,88px);
    padding:6px 0 8px;background:linear-gradient(180deg,var(--paper,#f6f7f9) 74%,transparent)}
  .natstory--v3 .ns__steps{position:static;height:auto;max-width:none;margin-top:6px}
  .natstory--v3 .nstep{position:relative;inset:auto;opacity:1;visibility:visible;transform:none;
    padding:clamp(24px,6vw,34px) 0;border-top:1px solid var(--hair)}
  .natstory--v3 .nstep:first-child{border-top:none}
  .natstory--v3 .nstep__mlabel{display:block}
  .natstory--v3 .ns__timeline{display:none}
}


/* ============================================================
   v4 REFINEMENTS — declutter "Tự nhiên", clean #needsapp background,
   generous final-CTA breathing room. Premium editorial > busy science.
   ============================================================ */

/* §2–4 · declutter the "Tự nhiên" section: drop the competing background
   atom + glow; let typography lead. Tighter, balanced max-width. */
.natstory--v4 .ns__stage::before{display:none}
.natstory--v4 .ns__center{max-width:820px;gap:clamp(8px,1.6vh,18px)}
.natstory--v4 .ns__steps{max-width:600px}
.natstory--v4 .nstep__viz{max-width:280px;margin-bottom:22px;opacity:.92}
.natstory--v4 .nstep__p{max-width:46ch}
/* a single hairline rule under the lockup for editorial structure */
.natstory--v4 .ns__suffix::after{content:"";display:block;width:52px;height:1px;margin:clamp(14px,2vh,22px) auto 0;
  background:linear-gradient(90deg,transparent,var(--red),transparent);opacity:.55}

/* §7 · #needsapp — remove the dark spill (the .sec-light transparent-top
   gradient revealing the dark body). Solid premium light bg + top breathing. */
.needsapp--clean{background:var(--silver-hi)!important;padding-top:clamp(72px,10vw,132px)}
.needsapp--clean .head-row{margin-top:0}

/* §6 · final CTA — stronger closing moment, more breathing room */
.final.finalx#contact{padding-top:clamp(120px,17vh,200px);padding-bottom:clamp(96px,13vh,168px)}
.finalx__head .label{margin-bottom:clamp(16px,2vh,24px)}
.finalx__head .finalx__h{margin-bottom:clamp(18px,2.4vh,30px)}
.finalx__cta{margin-top:clamp(26px,3.4vh,40px)}

/* §9 · floating CTA safety — never sit over centered story content */
@media(min-width:921px){
  .natstory--v4 .ns__center{padding-right:max(var(--pad),24px);padding-left:max(var(--pad),24px)}
}

/* ============================================================
   v4 · FULL centered composition rule set (v3's rules were --v3-scoped;
   these give .natstory--v4 its own working suffix swap + lockup + steps +
   timeline + mobile fallback). No background orbit here by design.
   ============================================================ */
.natstory--v4 .ns__stage{justify-content:center;padding:clamp(88px,12vh,132px) 0 clamp(34px,6vh,64px)}
.natstory--v4 .ns__center{position:relative;z-index:1;margin:0 auto;padding:0 var(--lede);
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  flex:1;min-height:0}
.natstory--v4 .ns__eyebrow{justify-content:center;margin-bottom:4px}

/* lockup: fixed word + animated suffix, centered, NO clipping */
.natstory--v4 .ns__lockup{position:relative;width:100%}
.natstory--v4 .ns__word{font-size:clamp(52px,8vw,112px);line-height:1.02;letter-spacing:-.03em;margin:0;padding-bottom:.04em}
.natstory--v4 .ns__suffix{position:relative;min-height:clamp(38px,4.8vw,70px);margin-top:8px}
.natstory--v4 .ns__sfx{position:absolute;left:0;right:0;top:0;text-align:center;
  font-family:var(--serif);font-weight:700;font-size:clamp(23px,3.3vw,44px);line-height:1.32;letter-spacing:-.018em;
  color:var(--red);padding-bottom:.16em;
  opacity:0;transform:translateY(.42em);transition:opacity .5s var(--ease),transform .55s var(--ease)}
.natstory--v4 .ns__sfx.on{opacity:1;transform:none}

/* centered swapping steps — graphic above text */
.natstory--v4 .ns__steps{position:relative;width:100%;margin:clamp(16px,2.6vh,30px) auto 0;height:min(42vh,330px)}
.natstory--v4 .nstep{align-items:center;text-align:center}
.natstory--v4 .nstep__viz{margin:0 auto 22px;color:var(--on-light-faint)}
.natstory--v4 .nstep__p{margin:0 auto}
.natstory--v4 .nstep__sub{margin:18px auto 0}

/* centered timeline */
.natstory--v4 .ns__timeline{flex:none;width:100%;max-width:420px;margin:0 auto}
.natstory--v4 .ns__timeline-in{gap:14px}
.natstory--v4 .ns__dots{grid-template-columns:repeat(3,auto);justify-content:center;gap:22px}
.natstory--v4 .ns__dotbtn{padding:6px 0}
.natstory--v4 .nstep__mlabel::before{content:none}

/* ---- mobile: centered anchor + stacked cards, no clip/overlap ---- */
@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .natstory--v4 .ns__stage{justify-content:flex-start}
  .natstory--v4 .ns__center{justify-content:flex-start;gap:14px}
  .natstory--v4 .ns__suffix{display:none}
  .natstory--v4 .ns__word{position:sticky;top:60px;z-index:2;font-size:clamp(48px,15vw,88px);
    padding:6px 0 8px;background:linear-gradient(180deg,var(--silver-hi,#f6f8fb) 74%,transparent)}
  .natstory--v4 .ns__steps{position:static;height:auto;max-width:none;margin-top:6px}
  .natstory--v4 .nstep{display:none;padding:clamp(24px,6vw,34px) 0;transition:opacity .25s ease;border-top:none}
  .natstory--v4 .nstep.on{position:relative;inset:auto;opacity:1;visibility:visible;transform:none;display:block;border-top:none}
  .natstory--v4 .nstep__mlabel{display:block}
  .natstory--v4 .ns__timeline{display:block}
  .natstory--v4 .ns__timeline-in{flex-direction:row;align-items:center;justify-content:space-between;gap:10px}
  .natstory--v4 .ns__timeline .ns__progress{display:none}
  .natstory--v4 .ns__dots{flex:1;display:flex;justify-content:center}
  .ns__navbtn{display:flex;align-items:center;justify-content:center;flex:none;width:36px;height:36px;
    border-radius:50%;border:1px solid var(--hair);background:#fff;color:var(--on-light);
    font-size:20px;line-height:1;cursor:pointer;transition:background .25s,border-color .25s}
  .ns__navbtn:hover{background:var(--paper-2,#f2f3f5)}
}


/* ============================================================
   v5 REFINEMENTS — Vigo logo, larger story graphics, Điểm-khởi-đầu
   breathing room, restrained floating CTA.
   ============================================================ */

/* §7 · VIGO LOGO — swap variant by nav tone; never oversized/distorted */
.vigo{display:flex;align-items:center;gap:10px}
.vigo__lbl{font-family:var(--mono);font-size:9px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--on-dark-faint);white-space:nowrap}
.vigo__logo{height:28px;width:auto;object-fit:contain;display:block}
.vigo__logo--dark{display:none}
.nav.on-light .vigo__logo--light{display:none}
.nav.on-light .vigo__logo--dark{display:block}
.nav.on-light .vigo__lbl{color:var(--on-light-faint)}

.foot__vigo{display:flex;align-items:center;gap:11px;margin:16px 0 4px}
.foot__vigo span{font-family:var(--mono);font-size:9.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--on-dark-faint)}
.foot__vigo img{height:34px;width:auto;object-fit:contain;display:block}

/* §4 (v6 direct edit) · graphic REMOVED from the "Tự nhiên" section — it is
   now typography-only. Rebalance the vertical rhythm now that the viz is gone. */
.natstory--v5 .ns__steps{height:min(38vh,300px)}
.natstory--v5 .nstep__p{font-size:clamp(17px,1.6vw,21px);line-height:1.55}

/* §2 (audit) · typography-only "Tự nhiên" — tighten the vertical rhythm so
   the section no longer feels empty after the graphic was removed. */
.natstory--v5 .ns__stage{padding:clamp(64px,9vh,104px) 0 clamp(28px,5vh,52px)}
.natstory--v5 .ns__center{gap:clamp(2px,0.6vh,8px)}
.natstory--v5 .ns__suffix{margin-top:10px}
.natstory--v5 .ns__steps{height:auto;min-height:clamp(120px,20vh,148px);margin-top:clamp(14px,2.2vh,24px)}
.natstory--v5 .ns__timeline{margin-top:clamp(10px,1.8vh,22px)}
@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .natstory--v5 .ns__steps{min-height:0}
}

/* §3 (audit) · "Linh hoạt trong ứng dụng" heading — balanced, no awkward wrap */
#needsapp .head h2{max-width:16ch;text-wrap:balance;line-height:1.06}
@media(max-width:768px){ #needsapp .head h2{max-width:none} }

/* §3 · legacy outro (now replaced by the full-screen #start section below) */
.natstory-outro{padding:clamp(104px,15vh,168px) var(--pad)}
.natstory-outro__in{max-width:720px}
.natstory-outro p{font-size:clamp(22px,2.7vw,34px)}

/* ============================================================
   ĐIỂM KHỞI ĐẦU — full-screen focused turning point + subtle signal animation
   ============================================================ */
.nstart{min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;
  padding-block:clamp(80px,12vh,140px)!important;position:relative;background:var(--silver-hi)}
.nstart__in{max-width:720px;margin:0 auto;padding:0 var(--pad);display:flex;flex-direction:column;align-items:center}
.nstart__k{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.28em;text-transform:uppercase;color:var(--red);margin-bottom:clamp(18px,2.6vh,30px)}
.nstart__h{font-family:var(--serif);font-weight:500;font-size:clamp(38px,6vw,88px);line-height:1.02;letter-spacing:-.025em;color:var(--on-light);margin:0}
.nstart__h .serif{font-style:italic;color:var(--red)}
.nstart__p{font-size:clamp(16px,1.7vw,21px);line-height:1.6;color:var(--on-light-mut);max-width:52ch;margin:clamp(20px,3vh,32px) auto 0;text-wrap:pretty}
.nstart__p b{color:var(--on-light);font-weight:600}

/* signal line that draws in */
.nstart__sig{width:min(560px,80%);margin:clamp(30px,4.5vh,52px) auto 0}
.nstart__sig svg{width:100%;height:44px;display:block;overflow:visible}
.nstart__base{fill:none;stroke:var(--hair);stroke-width:1}
.nstart__draw{fill:none;stroke:var(--red);stroke-width:1.6;stroke-linecap:round;
  stroke-dasharray:624;stroke-dashoffset:624}
.nstart__pulse{fill:var(--red);opacity:0}
.nstart__sig.in .nstart__draw{transition:stroke-dashoffset 1.4s var(--ease) .1s;stroke-dashoffset:0}
@media(prefers-reduced-motion:no-preference){
  .nstart__sig.in .nstart__pulse{opacity:1;animation:nstartPulse 2.6s var(--ease) 1s infinite}
}
@keyframes nstartPulse{0%{transform:translateX(0);opacity:0}12%{opacity:1}88%{opacity:1}100%{transform:translateX(548px);opacity:0}}

.nstart__chips{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:clamp(26px,3.6vh,40px)}
.nstart__ar{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;
  margin-top:clamp(26px,4vh,44px);border:1px solid var(--hair);color:var(--red);font-size:18px;
  transition:transform .3s var(--ease),border-color .3s,background .3s}
.nstart__ar:hover{transform:translateY(3px);border-color:var(--red);background:rgba(204,31,60,.06)}

/* philosophy-bridge — a pinned scroll "curtain" that replaces the section
   above: the inner pins full-height while the previous section scrolls up
   under it (solid ground), then releases into the mechanism section. */
.nstart--bridge{position:relative;min-height:auto;padding:0;background:var(--paper);height:150vh}
.nstart--bridge .nstart__in{position:sticky;top:0;min-height:100vh;height:100vh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  max-width:860px;margin:0 auto;padding:clamp(60px,10vh,120px) var(--pad)}
/* scroll-scrubbed progressive reveal where supported; else the IO .rv/.tell
   classes still reveal on enter (graceful fallback) */
@supports (animation-timeline: view()){
  .nstart--bridge .nstart__k{animation:brUp linear both;animation-timeline:view();animation-range:entry 4% cover 24%}
  .nstart--bridge .nstart__h{animation:brUp linear both;animation-timeline:view();animation-range:entry 10% cover 40%}
  .nstart--bridge .nstart__p{animation:brUp linear both;animation-timeline:view();animation-range:entry 24% cover 54%}
  .nstart--bridge .nstart__sig{animation:brLine linear both;animation-timeline:view();animation-range:entry 34% cover 66%}
}
@keyframes brUp{from{opacity:0;transform:translateY(32px)}to{opacity:1;transform:none}}
@keyframes brLine{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

@media(max-width:920px){
  .nstart{min-height:auto}
  .nstart--bridge{height:auto}
  .nstart--bridge .nstart__in{position:static;min-height:auto;height:auto;padding:clamp(64px,12vh,96px) var(--pad)}
}
@media(min-width:769px) and (max-width:1024px){ .nstart{min-height:90vh} }

/* ============================================================
   v6 direct-edit refinements (worked on v5, per request):
   dropped-char + richer "Tự nhiên" motion · product colours on light ·
   "Linh hoạt" title wrap.
   ============================================================ */

/* §1a · "không cần nghỉ dưỡng" dropped word — the sub pill was wrapping to a
   2nd line that the pinned stage's overflow:hidden clipped. Keep it one line
   on the pinned (desktop) layout so the last word can never be cut. */
@media(min-width:921px){
  .natstory--v5 .nstep__sub{white-space:nowrap;max-width:none}
}

/* §1b · richer, still-premium motion for "Từ khoa học đến làn da":
   - anchor word gets a slow luminous sheen sweeping across it
   - the suffix now WIPES in (clip-path) as well as fading, feeling deliberate
   - glow tint shifts subtly per active state (data-state set by JS) */
.natstory--v5 .ns__word{position:relative}
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .natstory--v5 .ns__word{background:linear-gradient(90deg,
      var(--on-light) 0%,var(--on-light) 38%,#c7345a 50%,var(--on-light) 62%,var(--on-light) 100%);
    background-size:280% 100%;background-position:0% 0%;
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
  @media(prefers-reduced-motion:no-preference){
    .natstory--v5 .ns__word{animation:nsSheen 9s ease-in-out infinite}
  }
}
@keyframes nsSheen{0%,100%{background-position:0% 0%}50%{background-position:100% 0%}}

.natstory--v5 .ns__sfx{clip-path:inset(0 100% 0 0);
  transition:opacity .5s var(--ease),transform .55s var(--ease),clip-path .62s var(--ease)}
.natstory--v5 .ns__sfx.on{clip-path:inset(0 0 0 0)}

/* per-state glow hue: thành phần (blue-neutral) → tăng sinh (warm active) → kết quả (calm rose) */
.natstory--v5 .ns__glow{transition:background 1s var(--ease)}
.natstory--v5[data-state="0"] .ns__glow{background:radial-gradient(circle, rgba(96,132,200,.14), rgba(96,132,200,.05) 42%, transparent 68%)}
.natstory--v5[data-state="1"] .ns__glow{background:radial-gradient(circle, rgba(224,86,110,.18), rgba(224,86,110,.06) 42%, transparent 70%)}
.natstory--v5[data-state="2"] .ns__glow{background:radial-gradient(circle, rgba(210,120,140,.13), rgba(210,120,140,.05) 44%, transparent 70%)}

/* §4 · PRODUCTS — restore accent colour + decorative graphics on the LIGHT
   section (the glow/rings/accents were tuned for dark and washed out on white). */
#products.sec-light .prod--stim{--ac:#2f6fd0;--acglow:rgba(47,111,208,.24)}
#products.sec-light .prod--lift{--ac:var(--red);--acglow:rgba(204,31,60,.20)}
#products.sec-light .prod__glow{opacity:.9;filter:blur(30px)}
#products.sec-light .prod__rings{opacity:.95}
#products.sec-light .prod__rings .ring{stroke:var(--ac);opacity:.55;stroke-width:.8}
#products.sec-light .prod__role{color:var(--ac)}
#products.sec-light .prod__chips .chip{background:var(--paper);
  border-color:color-mix(in srgb,var(--ac) 42%,transparent);
  color:color-mix(in srgb,var(--ac) 82%,#0a0d12)}
#products.sec-light .prod__chips .chip .d{background:var(--ac)}
#products.sec-light .prod__specs dd .num{color:var(--ac)}
/* product CTAs are secondary/directional — consistent dark button, red reserved for conversion */
#products.sec-light .prod .btn--solid{--bg:#12151b;--fg:#fff;--bd:transparent}
#products.sec-light .prod .btn--solid:hover{--bg:#20242e}

/* §5 · "Linh hoạt trong ứng dụng" — clean 2-line title (black line / red line),
   no more 4-line broken wrap. */
#needsapp .head h2{max-width:none;text-wrap:balance;line-height:1.05;
  font-size:clamp(2rem,3.35vw,3.15rem)}
#needsapp .head h2 .serif{display:block}
@media(max-width:768px){ #needsapp .head h2{font-size:clamp(1.9rem,7vw,2.6rem)} }

/* §8 · floating CTA — restrained; only the conversion action stays prominent */
.stick a:not(.is-red){opacity:.72}
.stick a:not(.is-red):hover{opacity:1}

/* ============================================================
   "TỪ KHOA HỌC ĐẾN LÀN DA" · Kinetic Typography + Subtle Signal Field
   Ambient motion runs whenever the section is on-screen (NOT gated on an
   entrance class, which was unreliable on this tall pinned section) — kept
   low-opacity, behind the text, gated only on prefers-reduced-motion.
   ============================================================ */
.natstory--v5 .ns__field{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.natstory--v5 .ns__center,.natstory--v5 .ns__timeline{position:relative;z-index:1}

/* soft radial glow behind the centred typography (breathes slowly) */
.natstory--v5 .ns__glow{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);
  width:min(66vw,760px);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle, rgba(204,31,60,.16), rgba(204,31,60,.06) 40%, transparent 66%);
  opacity:.9}

/* two low-opacity monomer/signal dot fields (box-shadow, no extra DOM) */
.natstory--v5 .ns__dots-a,.natstory--v5 .ns__dots-b{position:absolute;left:50%;top:50%;width:2.5px;height:2.5px;border-radius:50%;
  background:rgba(20,28,45,.4)}
.natstory--v5 .ns__dots-a{box-shadow:-280px -120px 0 rgba(20,28,45,.38),-180px 90px 0 rgba(204,31,60,.42),-90px -60px 0 rgba(20,28,45,.30),
  40px 130px 0 rgba(20,28,45,.32),150px -110px 0 rgba(204,31,60,.38),240px 60px 0 rgba(20,28,45,.30),320px -30px 0 rgba(20,28,45,.26),-330px 40px 0 rgba(20,28,45,.24)}
.natstory--v5 .ns__dots-b{box-shadow:-240px 30px 0 rgba(20,28,45,.26),-120px -140px 0 rgba(20,28,45,.28),0 100px 0 rgba(204,31,60,.30),
  110px 40px 0 rgba(20,28,45,.28),210px -80px 0 rgba(20,28,45,.24),300px 110px 0 rgba(20,28,45,.22),-300px -70px 0 rgba(204,31,60,.26)}

/* suffix: fade + clear vertical slide as each state becomes active */
.natstory--v5 .ns__sfx{will-change:opacity,transform}

/* signal underline lives on each suffix span, so it RE-DRAWS every time that
   span gets `.on` (JS toggles the class per state change) */
.natstory--v5 .ns__sfx::after{content:"";position:absolute;left:50%;bottom:-6px;transform:translateX(-50%) scaleX(0);
  transform-origin:center;width:clamp(46px,6vw,88px);height:2.5px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--red),transparent);opacity:0}
.natstory--v5 .ns__sfx.on::after{opacity:.85;transform:translateX(-50%) scaleX(1)}

@media(prefers-reduced-motion:no-preference){
  .natstory--v5 .ns__glow{animation:nsGlow 6s ease-in-out infinite}
  .natstory--v5 .ns__dots-a{animation:nsDrift 24s ease-in-out infinite}
  .natstory--v5 .ns__dots-b{animation:nsDrift 32s ease-in-out infinite reverse}
  .natstory--v5 .ns__sfx.on::after{animation:nsSig .9s var(--ease)}
  .natstory--v5 .ns__dotbtn.on .ns__dot2{animation:nsDotPulse 2.2s ease-in-out infinite}

  /* per-state intensity variation (State 2 = more active, State 3 = calmer) */
  .natstory--v5[data-state="1"] .ns__glow{animation-duration:4.2s}
  .natstory--v5[data-state="1"] .ns__dots-a{animation-duration:16s}
  .natstory--v5[data-state="1"] .ns__dots-b{animation-duration:20s}
  .natstory--v5[data-state="2"] .ns__glow{animation-duration:9s;background:radial-gradient(circle, rgba(204,31,60,.13), rgba(204,31,60,.05) 42%, transparent 68%)}
}
@keyframes nsGlow{0%,100%{opacity:.82;transform:translate(-50%,-50%) scale(1)}50%{opacity:1;transform:translate(-50%,-50%) scale(1.07)}}
@keyframes nsDrift{0%,100%{transform:translate(-50%,-50%)}50%{transform:translate(calc(-50% + 16px),calc(-50% - 13px))}}
@keyframes nsSig{0%{transform:translateX(-50%) scaleX(0);opacity:0}45%{opacity:1}70%{transform:translateX(-50%) scaleX(1.12);opacity:1}100%{transform:translateX(-50%) scaleX(1);opacity:.85}}
@keyframes nsDotPulse{0%,100%{box-shadow:0 0 0 4px rgba(204,31,60,.16)}50%{box-shadow:0 0 0 8px rgba(204,31,60,.04)}}

/* mobile: keep it calm — drop the drifting dot field, keep glow + underline */
@media(max-width:920px){
  .natstory--v5 .ns__dots-a,.natstory--v5 .ns__dots-b{display:none}
  .natstory--v5 .ns__glow{width:min(90vw,460px);opacity:.85}
}

/* ============================================================
   CƠ CHẾ SINH LÝ CHỦ ĐỘNG · pinned 3-pillar mechanism (#difference / .mechx)
   Bespoke scientific graphics — signal transmission, closed-loop amino-acid
   synthesis, ECM/pH equilibrium. Reuses the pinned .pm__ scaffold; three
   chapters → shorter track. Palette stays blue-signal + restrained red,
   with gold only on Pillar 2's biosynthesis output. Motion arms on scroll-in
   (.pinmaster.armed) and re-fires per active chapter, reduced-motion safe.
   ============================================================ */
#difference.mechx .pm__track{height:340vh}
/* 3rd (last) chapter is ECM/pH — keep its ambient glow calm blue, NOT the
   red "legal" tint the generic JS would otherwise apply on the final index */
.mechx.on-legal .pm__stage::before{background:radial-gradient(ellipse 62% 56% at 62% 48%, rgba(96,132,200,.15), rgba(96,132,200,.05) 46%, transparent 72%)}

.mechx .pmc__p--sub{margin-top:14px;font-size:clamp(14px,1.4vw,17px);color:var(--on-dark-faint)}
.mechx .pmc__p--sub b{color:#cfe0f6;font-weight:600}

/* ---------- PILLAR 1 · signal transmission (.sigviz) ---------- */
.sigviz{position:relative;width:min(100%,460px);aspect-ratio:420/380}
.sigviz svg{width:100%;height:100%;overflow:visible}
.sigviz .sig__links line{stroke:rgba(159,192,234,.28);stroke-width:1}
.sigviz .sig__ring{fill:none;stroke:rgba(159,192,234,.55);stroke-width:2.4;stroke-dasharray:3.4 3.9;transform-origin:210px 190px}
.sigviz .sig__coreglow{fill:rgba(224,86,110,.16)}
.sigviz .sig__core{fill:#0b0e13;stroke:var(--red-soft);stroke-width:2.2}
.sigviz .sig__pulse{fill:none;stroke:var(--red-soft);stroke-width:1.6;transform-box:fill-box;transform-origin:center;opacity:0}
.sigviz .sig__s{fill:#ffd9e0;opacity:0}
.sigviz .sig__halo{fill:rgba(159,192,234,.10);stroke:rgba(159,192,234,.35);stroke-width:1}
.sigviz .sig__node{fill:#0b0e13;stroke:#9fc0ea;stroke-width:2;transform-box:fill-box;transform-origin:center}
.sig__lbl{position:absolute;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:#cfe0f6;white-space:nowrap;transform:translate(-50%,-50%);pointer-events:none}
.sig__lbl--c{left:50%;top:50%;font-size:11.5px;color:#fff;font-weight:600}
.sig__lbl--0{left:50%;top:11%}
.sig__lbl--1{left:80.5%;top:69.5%}
.sig__lbl--2{left:19.5%;top:69.5%}
@media(prefers-reduced-motion:no-preference){
  .pinmaster.armed .pmc.on .sigviz .sig__ring{animation:mxSpin 30s linear infinite}
  .pinmaster.armed .pmc.on .sigviz .sig__coreglow{animation:mxCoreGlow 2.6s ease-in-out infinite}
  .pinmaster.armed .pmc.on .sigviz .sig__pulse{animation:mxPulse 2.6s ease-out infinite}
  .pinmaster.armed .pmc.on .sigviz .sig__pulse:nth-child(2){animation-delay:.87s}
  .pinmaster.armed .pmc.on .sigviz .sig__pulse:nth-child(3){animation-delay:1.74s}
  .pinmaster.armed .pmc.on .sigviz .sig__s--0{animation:mxSpark0 2.6s ease-in infinite}
  .pinmaster.armed .pmc.on .sigviz .sig__s--1{animation:mxSpark1 2.6s ease-in infinite .25s}
  .pinmaster.armed .pmc.on .sigviz .sig__s--2{animation:mxSpark2 2.6s ease-in infinite .5s}
  .pinmaster.armed .pmc.on .sigviz .sig__r:nth-child(1) .sig__node{animation:mxRecep 2.6s ease-out infinite .78s}
  .pinmaster.armed .pmc.on .sigviz .sig__r:nth-child(2) .sig__node{animation:mxRecep 2.6s ease-out infinite 1.03s}
  .pinmaster.armed .pmc.on .sigviz .sig__r:nth-child(3) .sig__node{animation:mxRecep 2.6s ease-out infinite 1.28s}
}
@keyframes mxSpin{to{transform:rotate(360deg)}}
@keyframes mxCoreGlow{0%,100%{opacity:.5;transform:scale(.9)}50%{opacity:1;transform:scale(1.15)}}
@keyframes mxPulse{0%{opacity:0;transform:scale(1)}12%{opacity:.9}100%{opacity:0;transform:scale(5.4)}}
@keyframes mxSpark0{0%{transform:translate(0,0);opacity:0}10%{opacity:1}70%{opacity:1}100%{transform:translate(0,-128px);opacity:0}}
@keyframes mxSpark1{0%{transform:translate(0,0);opacity:0}10%{opacity:1}70%{opacity:1}100%{transform:translate(128px,58px);opacity:0}}
@keyframes mxSpark2{0%{transform:translate(0,0);opacity:0}10%{opacity:1}70%{opacity:1}100%{transform:translate(-128px,58px);opacity:0}}
@keyframes mxRecep{0%,55%{fill:#0b0e13;stroke:#9fc0ea}70%{fill:#eaf3ff;stroke:#fff}100%{fill:#0b0e13;stroke:#9fc0ea}}
.sigviz .sig__s--0{transform-box:fill-box}
.sigviz .sig__s{transform-box:fill-box}
/* place sparks at the core to start */
.sigviz .sig__s--0,.sigviz .sig__s--1,.sigviz .sig__s--2{cx:210px;cy:190px}

/* ---------- PILLAR 2 · closed-loop amino-acid synthesis (.aaviz) ---------- */
.aaviz{position:relative;width:min(100%,440px);aspect-ratio:1}
.aaviz svg{width:100%;height:100%;overflow:visible}
.aaviz .aa__loop{fill:none;stroke:rgba(159,192,234,.22);stroke-width:2}
.aaviz .aa__flow{fill:none;stroke:#ffd98a;stroke-width:2.6;stroke-linecap:round;stroke-dasharray:90 772;stroke-dashoffset:0;opacity:.95}
.aaviz .aa__nodes circle{fill:#0b0e13;stroke:#9fc0ea;stroke-width:2;transform-box:fill-box;transform-origin:center}
.aaviz .aa__runner{fill:#ffe6b0;filter:drop-shadow(0 0 6px rgba(255,214,140,.8));offset-path:path("M190,50 L280,82.8 L327.9,165.7 L311.2,260 L237.9,321.6 L142.1,321.6 L68.8,260 L52.1,165.7 L100,82.8 Z");offset-rotate:0deg}
.aaviz .aa__fibers path{fill:none;stroke:#ffd98a;stroke-width:1.6;stroke-linecap:round;stroke-dasharray:120;stroke-dashoffset:120;opacity:.75}
.aa__lbl{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;color:#ffe6b0;white-space:nowrap;pointer-events:none}
.aa__count{position:absolute;left:50%;top:40%;transform:translate(-50%,-50%);font-family:var(--serif);font-style:italic;font-size:22px;color:#fff;pointer-events:none}
@media(prefers-reduced-motion:no-preference){
  .pinmaster.armed .pmc.on .aaviz .aa__flow{animation:mxFlow 4.2s linear infinite}
  .pinmaster.armed .pmc.on .aaviz .aa__runner{animation:mxRunner 4.2s linear infinite}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle{animation:mxNode 4.2s ease-in-out infinite}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(1){animation-delay:0s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(2){animation-delay:.467s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(3){animation-delay:.933s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(4){animation-delay:1.4s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(5){animation-delay:1.867s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(6){animation-delay:2.333s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(7){animation-delay:2.8s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(8){animation-delay:3.267s}
  .pinmaster.armed .pmc.on .aaviz .aa__nodes circle:nth-child(9){animation-delay:3.733s}
  .pinmaster.armed .pmc.on .aaviz .aa__fibers path{animation:mxFiber 2.4s var(--ease) forwards}
  .pinmaster.armed .pmc.on .aaviz .aa__fibers path:nth-child(2){animation-delay:.5s}
  .pinmaster.armed .pmc.on .aaviz .aa__fibers path:nth-child(3){animation-delay:1s}
}
@keyframes mxFlow{to{stroke-dashoffset:-862}}
@keyframes mxRunner{from{offset-distance:0%}to{offset-distance:100%}}
@keyframes mxNode{0%,100%{fill:#0b0e13;stroke:#9fc0ea}45%{fill:#ffe6b0;stroke:#ffd98a}}
@keyframes mxFiber{to{stroke-dashoffset:0}}

/* ---------- PILLAR 3 · ECM matrix + pH equilibrium (.ecmviz) ---------- */
.ecmviz{position:relative;width:min(100%,480px);aspect-ratio:420/320}
.ecmviz svg{width:100%;height:auto}
.ecmviz .ecm__mesh path{stroke:rgba(159,192,234,.24);stroke-width:1;fill:none;transform-box:fill-box;transform-origin:center}
.ecmviz .ecm__cell{fill:rgba(159,192,234,.14);stroke:rgba(159,192,234,.55);stroke-width:1.4}
.ecm__ph{position:absolute;left:8%;right:8%;bottom:2%;pointer-events:none}
.ecm__phtrack{position:relative;height:2px;border-radius:2px;background:linear-gradient(90deg,rgba(159,192,234,.2),rgba(159,192,234,.45),rgba(159,192,234,.2))}
.ecm__phmark{position:absolute;top:50%;left:50%;width:12px;height:12px;border-radius:50%;transform:translate(-50%,-50%);
  background:radial-gradient(circle at 50% 40%,#fff,var(--red-soft) 62%,transparent 76%);box-shadow:0 0 10px 2px rgba(224,86,110,.5)}
.ecm__phscale{display:flex;justify-content:space-between;margin-top:9px;font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;color:var(--on-dark-faint)}
.ecm__phscale .is-mid{color:var(--red-soft);font-weight:600}
.ecm__tag{position:absolute;left:50%;top:6%;transform:translateX(-50%);font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--on-dark-mut);white-space:nowrap;pointer-events:none}
@media(prefers-reduced-motion:no-preference){
  .pinmaster.armed .pmc.on .ecmviz .ecm__mesh{animation:mxMeshOpen 5s ease-in-out infinite}
  .pinmaster.armed .pmc.on .ecmviz .ecm__cell{animation:mxCellDrift 9s ease-in-out infinite}
  .pinmaster.armed .pmc.on .ecmviz .ecm__cell:nth-child(2){animation-duration:11s;animation-delay:.6s}
  .pinmaster.armed .pmc.on .ecmviz .ecm__cell:nth-child(3){animation-duration:10s;animation-delay:1.2s}
  .pinmaster.armed .pmc.on .ecmviz .ecm__cell:nth-child(4){animation-duration:12s;animation-delay:.3s}
  .pinmaster.armed .pmc.on .ecmviz .ecm__phmark{animation:mxPh 4.4s var(--ease) infinite}
}
@keyframes mxMeshOpen{0%,100%{transform:scale(.94);opacity:.7}50%{transform:scale(1.03);opacity:1}}
@keyframes mxCellDrift{0%,100%{transform:translate(0,0)}25%{transform:translate(14px,-10px)}50%{transform:translate(-8px,12px)}75%{transform:translate(10px,8px)}}
@keyframes mxPh{0%{left:22%}30%{left:64%}60%{left:44%}100%{left:50%}}

/* ---------- mechanism · mobile/stacked fallback ---------- */
@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .mechx .pmc__viz{margin-top:8px}
  .sigviz,.aaviz,.ecmviz{margin:0 auto}
  .sigviz{max-width:340px}
  .aaviz{max-width:320px}
  .ecmviz{max-width:400px}
}

/* ---------- mechanism timeline · 3 pillars (generic scaffold assumes 4) ---------- */
.mechx .pm__dots{grid-template-columns:repeat(3,1fr)}
.mechx .pm__dl{gap:3px}
.mechx .pm__dl b{margin-bottom:1px}

/* ============================================================
   §6 · direct-edit fixes (round 2) — products graphics + collagen breathing
   ============================================================ */
/* PRODUCTS · the decorative glow + orbital rings use z-index:-1; on the opaque
   light #products section they were painting BEHIND the section background and
   vanished. isolation:isolate makes each .prod its own stacking context so the
   negative-z decoration sits behind the card content but above the section. */
#products .prod{isolation:isolate}
#products.sec-light .prod__glow{opacity:.85;filter:blur(34px)}
#products.sec-light .prod--stim .prod__rings .ring{stroke:#2f6fd0}
#products.sec-light .prod--lift .prod__rings .ring{stroke:var(--red)}
#products.sec-light .prod__rings{opacity:.85}
#products.sec-light .prod__rings .ring{stroke-width:.9;opacity:.5}

/* collagen fibres · a touch more air between the "Collagen · Elastin" label
   and the woven fibre lines so nothing reads as stuck together */
.aaviz .aa__count{top:38%}
.aaviz .aa__lbl{top:47%}

/* ============================================================
   §7 (direct edit) · "Tự nhiên" lockup → single line, uppercase:
   "TỰ NHIÊN trong THÀNH PHẦN". Same swap-on-scroll mechanics (JS only
   toggles .on on .ns__sfx by index) — this is layout/typography only.
   ============================================================ */
.natstory--v5 .ns__lockup{display:flex;flex-wrap:nowrap;align-items:baseline;
  justify-content:center;column-gap:.32em;row-gap:0;width:100%;overflow:visible}
.natstory--v5 .ns__word{font-weight:500;text-transform:uppercase;white-space:nowrap;
  font-size:clamp(26px,3.4vw,44px);line-height:1.3;padding-bottom:0}
.natstory--v5 .ns__trong{font-family:var(--sans);font-weight:400;white-space:nowrap;
  font-size:clamp(19px,2.5vw,32px);line-height:1.3;color:var(--on-light-mut)}
.natstory--v5 .ns__suffix{position:relative;display:inline-grid;min-height:0;margin-top:0;overflow:visible}
.natstory--v5 .ns__suffix::after{display:none}
.natstory--v5 .ns__sfx{position:relative;grid-area:1/1;left:auto;right:auto;top:auto;
  text-align:left;text-transform:uppercase;font-weight:500;color:var(--on-light);white-space:nowrap;
  font-size:clamp(26px,3.4vw,44px);line-height:1.3;padding-bottom:0}

@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .natstory--v5 .ns__lockup{column-gap:.28em}
  .natstory--v5 .ns__trong,.natstory--v5 .ns__suffix{display:none}
}

/* ============================================================
   §8 (direct edit) · per-step placeholder illustration, 6:4.
   Temporary stock photo, swap the <img src> for real assets later.
   Width kept at the original size (min(90vw,620px)) — 6:4 is taller
   per unit width than the old 16:7, so .ns__steps gets extra min-height
   to absorb it. .ns__stage is pinned (100vh/overflow:hidden) on desktop,
   but the mobile/short-viewport breakpoint below already drops pinning
   for a static flow, so real clipping risk is limited to short desktop
   windows (~640–800px tall).
   ============================================================ */
.natstory--v5 .nstep__viz{width:100%;max-width:min(90vw,620px);aspect-ratio:6/3;
  margin:20px auto clamp(14px,2vh,20px);border-radius:var(--r-lg);overflow:hidden;
  opacity:1;background:var(--card)}
.natstory--v5 .nstep__viz img{width:100%;height:100%;object-fit:cover;display:block}
.natstory--v5 .ns__steps{min-height:clamp(320px,44vh,460px)}

@media(max-width:899px),(max-height:599px),(hover:none),(pointer:coarse){
  .natstory--v5 .nstep__viz{max-width:360px;margin:0 0 16px}
}

/* ============================================================
   §9 (direct edit) · TRIẾT LÝ — plain philosophy statement on a
   black→white diagonal gradient (slightly off-axis, not a straight
   corner-to-corner), inserted right after "Từ khoa học đến làn da"
   (#needs). Same copy as the (currently disabled) sec-light
   nstart--bridge block below. Text is uniform weight/color — no
   italic or accent-color emphasis — per reference mock.
   ============================================================ */
.philosophy{position:relative;padding:clamp(56px,7vh,96px) var(--pad);
  display:flex;align-items:center;justify-content:center;text-align:center;
  background:linear-gradient(0deg,#05070a 0%,#101215 14%,#25272b 28%,#43464b 42%,#6d6f74 55%,#9b9da1 66%,#c8cacd 76%,#e6e8ea 87%,#f8f9fb 100%)}
.philosophy__in{max-width:760px;margin:0 auto}
.philosophy__h{font-family:var(--sans);font-weight:400;font-size:clamp(28px,4.2vw,48px);
  line-height:1.2;letter-spacing:-.015em;color:#171a20;margin:0;text-wrap:balance}
.philosophy__p{font-weight:300;font-size:clamp(14px,1.4vw,17px);line-height:1.75;color:#f1f1f1;
  max-width:56ch;margin:clamp(18px,2.6vh,28px) auto 0;text-wrap:pretty}

@media(max-width:640px){
  .philosophy{padding:clamp(48px,10vh,80px) var(--pad)}
}

/* ============================================================
   §10 (direct edit) · "LINH HOẠT TRONG ỨNG DỤNG" — show all need
   cards at once, no horizontal drag/scroll. Overrides the shared
   .needs-scroll horizontal-strip pattern (design-system default in
   sections.css) with a wrapping grid, scoped to this section only.
   ============================================================ */
#needsapp .needs-scroll{overflow-x:visible;overflow-y:visible;scroll-snap-type:none;padding-bottom:0}
#needsapp .needs{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:clamp(16px,1.8vw,24px);max-width:var(--wrap-wide);margin:0 auto;padding:0 var(--pad)}
#needsapp .need{flex:none;width:100%}
@media(max-width:640px){
  #needsapp .needs{grid-template-columns:1fr 1fr;gap:12px}
}

/* ============================================================
   §11 (direct edit) · "Cơ chế sinh lý chủ động" pillar kicker — big
   thin numeral + small uppercase label on the same baseline, no
   divider line, left-aligned block per reference mock.
   ============================================================ */
.mechx .pmc__kicker{align-items:baseline;gap:14px;margin-bottom:14px;
  font-size:24px;letter-spacing:.22em;color:var(--on-dark-mut)}
.mechx .pmc__kicker b{font-family:var(--sans);font-weight:300;font-size:clamp(40px,4.4vw,60px);
  letter-spacing:-.01em;color:#c9c7c7}
.mechx .pmc__kbar{display:none}
.mechx .pmc__p{margin-top:16px;color:#fff;font-size:clamp(13px,1.35vw,16px)}

/* ============================================================
   §12 (direct edit) · "Hai giải pháp chuyên biệt" (#products) — tighten
   the gap between the heading and the STIM/LIFT product images. Scoped
   to #products only (index.html) — kham-pha-acurhyal-dong-san-pham.html
   also uses the shared .split rule in microsite.css and is intentionally
   left untouched.
   ============================================================ */
#products .split{margin-top:clamp(16px,1.5vw,24px)}

/* index.html simplified the STIM/LIFT cards down to just image + CTA
   (.prod__role/h3/.prod__glow commented out in HTML) — the old top
   padding + .prod__stage margin were sized to clear that removed
   copy, leaving a big empty gap above the product photos now. */
#products .prod{padding-top:clamp(10px,1.5vw,18px)}
#products .prod__stage{margin-top:6px}

/* ============================================================
   §13 (direct edit) · "CẬP NHẬT SỰ KIỆN CHUYÊN MÔN" (#training) —
   #training itself stays sec-dark. .sched/.ev/.res/.res-strip are now
   defined light-native in microsite.css (reused verbatim on
   dao-tao-su-kien-cme.html / livestream.html too), so only .chip needs
   a local override here — its .sec-light variant in base.css doesn't
   apply since this section is sec-dark, not sec-light.
   ============================================================ */
#training .chip{color:var(--on-light-mut);border-color:var(--line-light);background:rgba(20,28,45,.04)}

/* ============================================================
   §14 (direct edit) · "THỰC CHỨNG LÂM SÀNG" (#clinical) — down to
   2 before/after cases (was 3), 2-column layout instead of 3. The
   shared .clin__ba rule already stacks to 1 column at ≤560px, which
   still applies fine for 2 items.
   ============================================================ */
#clinical .clin__ba{grid-template-columns:1fr 1fr}

/* ===== css/pages/product-detail.css ===== */
/* ============================================================
   ACURHYAL · product-detail.css
   Shared styles for the dedicated product pages (STIM / LIFT) and the
   product gateway (dòng sản phẩm). Built on the v5 light design system —
   Manrope only, existing tokens, red used as accent. No new visual language.
   ============================================================ */

/* hero: copy left, product image right (on the dark .phero) */
.pdp-heroGrid{display:grid;grid-template-columns: .60fr 1.32fr;gap:clamp(28px,5vw,72px);align-items:center}
.pdp-heroGrid__img{position:relative;display:flex;justify-content:center;align-items:center}
.pdp-heroGrid__img img{width:min(100%,400px);height:auto;display:block;
  filter:drop-shadow(0 46px 84px rgba(0,0,0,.55))}
.pdp-heroGrid__tag{position:absolute;left:8%;bottom:6%;font-family:var(--mono);font-size:10.5px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--on-dark-mut)}
@media(max-width:860px){
  .pdp-heroGrid{grid-template-columns:1fr;gap:26px}
  .pdp-heroGrid__img{order:-1;max-width:250px;margin:0 auto}
}

/* role / direction cards (light) */
.prole{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.prole__c{position:relative;background:var(--card);border:1px solid var(--hair);border-radius:var(--r);padding:24px 22px;
  transition:transform .35s var(--ease),border-color .3s,box-shadow .35s}
.prole__c:hover{transform:translateY(-3px);border-color:var(--hair-2);box-shadow:0 24px 56px -40px rgba(20,28,45,.45)}
.prole__no{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--red)}
.prole__c h3{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--on-light);margin:12px 0 0;line-height:1.2}
.prole__c p{font-size:13.5px;line-height:1.55;color:var(--on-light-mut);margin:8px 0 0}

/* spec table (compact) */
.pspec{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1px;background:var(--hair);
  border:1px solid var(--hair);border-radius:var(--r);overflow:hidden}
.pspec__row{background:var(--card);padding:18px 20px}
.pspec__row dt{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--on-light-faint)}
.pspec__row dd{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--on-light);margin:6px 0 0}
.pspec__row dd .u{display:block;font-family:var(--sans);font-size:12.5px;font-weight:500;color:var(--on-light-mut);letter-spacing:0;margin-top:3px}

/* application → skin needs (compact chips row) */
.papp{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.papp__chip{display:inline-flex;align-items:center;gap:9px;padding:11px 16px;border-radius:100px;
  background:var(--card);border:1px solid var(--hair);font-size:13.5px;font-weight:500;color:var(--on-light)}
.papp__chip::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red);flex:none}

/* related product card */
.related{display:grid;grid-template-columns:auto 1fr auto;gap:clamp(18px,3vw,34px);align-items:center;
  background:var(--card);border:1px solid var(--hair);border-radius:var(--r-lg);padding:clamp(22px,3vw,32px)}
.related__img{width:clamp(74px,10vw,110px);height:auto;display:block}
.related__b h3{font-size:clamp(20px,2.4vw,28px);font-weight:700;letter-spacing:-.02em;color:var(--on-light)}
.related__b h3 b{color:var(--red)}
.related__b p{font-size:14px;line-height:1.55;color:var(--on-light-mut);margin-top:6px;max-width:52ch}
@media(max-width:640px){
  .related{grid-template-columns:1fr;text-align:center;gap:16px;justify-items:center}
  .related__img{width:120px}
}

/* section-level CTA row */
.pdp-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(26px,3.4vw,40px)}

/* ---------------- accordion body lists (STIM page only) — the base .prose
   has no ul/li styling at all (global reset strips list padding), so
   bullets rendered clipped/misaligned. Scoped to #stimAcc rather than the
   shared .prose class so san-pham-acurhyal-lift.html is unaffected. ---------------- */
#stimAcc .prose ul{list-style:none;margin:14px 0 14px;display:flex;flex-direction:column;gap:11px}
#stimAcc .prose li{position:relative;padding-left:22px;font-size:15px;line-height:1.6;color:var(--on-light-mut)}
#stimAcc .prose li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--red)}
#stimAcc .prose li strong{color:var(--on-light);font-weight:600}

/* ===== css/design-system/header-footer-light.css ===== */
/* ============================================================
   HEADER — luôn nền trắng, 2 tầng (logo+CTA / menu) — theo mock-up
   FOOTER — nền trắng
   ============================================================ */

.nav{
  background:var(--paper) !important;
  backdrop-filter:none !important;
  border-bottom:1px solid var(--line-light);
  transition:none;
}
.nav::after{display:none}

/* ---- single row: logo | nav links (truly centered via grid) | CTA + burger ---- */
.nav__in{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:20px;
  padding:5px var(--pad);
}
.nav__in>.brand{grid-column:1}
.nav__in>.nav__links{grid-column:2;justify-content:center}
.nav__in>.nav__right{grid-column:3}

/* ---- logo: image lockup ---- */
.brand__logo{height:70px;width:auto;display:block}

/* ---- menu link ---- */
.nav__links>a,.nav__trigger{
  color:var(--on-light) !important;
  font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;
}
.nav__links>a:hover,.nav__links>a.active,
.nav__trigger:hover,.nav__trigger.active,.nav__trigger[aria-expanded="true"]{
  color:var(--on-light) !important;background:none !important;
}

.nav .burger span{background:var(--on-light) !important}

/* ---- ẩn khối "Nhà phân phối" trong header (không có trong mock-up) ---- */
.nav__right .vigo{display:none !important}

/* ---- nút CTA đỏ có icon tròn ---- */
.nav .btn--red.btn--sm{
  display:inline-flex;align-items:center;gap:8px;
  text-transform:uppercase;letter-spacing:.06em;
}
.nav .btn__ic{
  width:18px;height:18px;border-radius:50%;
  background:rgba(255,255,255,.25);
  display:inline-flex;align-items:center;justify-content:center;flex:none;
}
.nav .btn__ic svg{width:9px;height:9px;display:block}

/* ============================================================
   FOOTER — nền trắng
   ============================================================ */
.foot{background:#fff !important;border-top:1px solid var(--line-light)}
.foot__brand p.foot__tag-h{color:var(--on-light);font-weight:700;font-size:15px;letter-spacing:.01em;margin:18px 0 3px;line-height:1.3;max-width:none}
.foot__brand p.foot__tag-sub{color:var(--on-light);font-size:13px;margin:0 0 22px;line-height:1.5;max-width:none}
.foot__stats div b{color:var(--on-light)}
.foot__stats div span{color:var(--on-light)}
.foot__col h5{color:var(--on-light);font-weight:700}
.foot__col a{color:var(--on-light)}
.foot__col a:hover{color:var(--red)}
.foot__bot{color:var(--on-light)}
.foot__vigo span{color:var(--on-light)}

/* ===== pages/phac-do-ung-dung.css ===== */
/* ============================================================
   ACURHYAL DESIGN SYSTEM · Page: Phác đồ ứng dụng (phac-do-ung-dung.html)
   Page-specific layout only — loads AFTER tokens/base/components/sections.
   Reuses shared tokens (--sans/--serif/--mono/--ink/--signal/--red/…),
   shared primitives (.wrap/.section/.label/.lede/.btn/.rv/.tell) and the
   editorial hairline rhythm established on the "Khám phá Acurhyal" pages.
   Prefix: pdx- (Protocol Direction eXperience).
   ============================================================ */

/* ---- fixed/sticky nav + anchor-scroll accuracy fix (same rationale as
   acurhyal-detail-v2.css): keep body a plain non-scrolling box so
   position:sticky + anchor jumps resolve against the viewport. ---- */
html{overflow-x:hidden}
body{overflow-x:visible}

/* ---- atom/flower orbit motif (matches the official Fusion/Acurhyal KV) ---- */
.pdx-orbit{position:absolute;z-index:-1;opacity:.5;pointer-events:none}
.pdx-orbit svg{width:100%;height:100%;animation:pdxSpin 150s linear infinite}
.pdx-orbit .ring{fill:none;stroke:rgba(159,192,234,.24);stroke-width:.4}
.pdx-orbit .core{fill:rgba(20,28,45,.65)}
@keyframes pdxSpin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.pdx-orbit svg{animation:none}}

/* ---- breadcrumb ---- */
.pdx-crumb{padding:132px var(--pad) 0;max-width:var(--wrap);margin-inline:auto}
.pdx-crumb nav{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--on-light-faint)}
.pdx-crumb a{color:var(--on-light-mut);transition:color .3s}
.pdx-crumb a:hover{color:var(--on-light)}

/* ---- hero — asymmetric editorial, orbit as corner motif ---- */
.pdx-hero{position:relative;padding:clamp(48px,7vh,86px) var(--pad) clamp(60px,9vh,110px);overflow:hidden;isolation:isolate}
.pdx-hero__orbit{right:clamp(-130px,-7vw,-40px);top:-10%;width:min(58vmin,580px);aspect-ratio:1;opacity:.32}
.pdx-hero__in{max-width:var(--wrap);margin-inline:auto;display:flex;flex-direction:column;align-items:flex-start;gap:22px}
.pdx-hero__h{font-family:var(--serif);font-weight:500;font-size:clamp(44px,7vw,92px);line-height:.98;letter-spacing:-.01em;max-width:15ch}
.pdx-hero__h em{font-style:italic;color:var(--signal)}
.pdx-hero__lede{max-width:62ch}
.pdx-hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
@media(max-width:760px){
  .pdx-hero{text-align:center}
  .pdx-hero__in{align-items:center}
  .pdx-hero__cta{justify-content:center}
  .pdx-hero__orbit{right:50%;transform:translateX(50%);top:-4%}
  .pdx-crumb{padding-top:112px}
}

/* ---- sticky sub anchor nav ---- */
.pdx-subnav{position:sticky;top:var(--pdx-nav-h,72px);z-index:40;background:rgba(248,249,251,.86);backdrop-filter:blur(18px);border-bottom:1px solid var(--hair)}
.pdx-subnav__in{max-width:var(--wrap-wide);margin-inline:auto;padding:0 var(--pad);display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.pdx-subnav__in::-webkit-scrollbar{display:none}
.pdx-subnav a{flex:none;font-size:12.5px;color:var(--on-light-faint);padding:16px 14px;white-space:nowrap;border-bottom:2px solid transparent;transition:.3s}
.pdx-subnav a:hover{color:var(--on-light)}
.pdx-subnav a.on{color:var(--on-light);border-color:var(--red-soft)}

/* ---- shared section rhythm — hairline-opened editorial sections ---- */
.pdx-sec{padding-block:clamp(70px,10vh,140px);border-top:1px solid var(--hair);
  scroll-margin-top:calc(var(--pdx-nav-h,72px) + var(--pdx-subnav-h,50px) + 18px)}
#intro{scroll-margin-top:var(--pdx-nav-h,72px)}
.pdx-kicker{display:flex;align-items:center;gap:10px;margin-bottom:16px;padding-top:clamp(30px,4.5vh,48px)}
.pdx-kicker b{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--red-soft)}
.pdx-kicker::before{content:"";width:26px;height:1px;background:var(--red-soft);opacity:.6}
.pdx-h2{font-family:var(--serif);font-weight:500;font-size:clamp(30px,4vw,54px);line-height:1.06;letter-spacing:-.01em;text-wrap:balance;max-width:20ch}
.pdx-h2 em{font-style:italic;color:var(--signal)}
.pdx-head{max-width:74ch;margin-bottom:clamp(36px,5vh,60px)}
.pdx-head .lede{margin-top:14px}
.pdx-h4{font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--on-light-faint);margin-bottom:14px}

/* ---- shared micro-pieces ---- */
.pdx-tag{display:inline-flex;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--signal)}
.pdx-soon{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:#ffd98a;border:1px solid rgba(255,214,140,.35);background:rgba(255,214,140,.07);padding:5px 11px;border-radius:100px;white-space:nowrap}
.pdx-soon::before{content:"";width:5px;height:5px;border-radius:50%;background:#ffd98a;flex:none}
.pdx-ok{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--signal);border:1px solid rgba(159,192,234,.3);background:rgba(159,192,234,.06);padding:5px 11px;border-radius:100px;white-space:nowrap}
.pdx-ok::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--signal-deep);flex:none}

/* concern list — hairline editorial list */
.pdx-list{list-style:none;display:flex;flex-direction:column;gap:0;border-top:1px solid var(--hair)}
.pdx-list li{display:flex;gap:12px;align-items:baseline;padding:12px 2px;border-bottom:1px solid var(--hair);
  font-size:14px;line-height:1.55;color:var(--on-light-mut)}
.pdx-list li::before{content:"—";flex:none;color:var(--on-light-faint)}

/* ============================================================
   OVERVIEW — 4 need cards
   ============================================================ */
.pdx-needs{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:860px){.pdx-needs{grid-template-columns:1fr}}
.pdx-need{position:relative;border:1px solid var(--hair);border-radius:var(--r-lg);padding:clamp(24px,3vw,36px);
  background:var(--card);display:flex;flex-direction:column;gap:16px;transition:border-color .35s,transform .35s,background .35s}
.pdx-need:hover{border-color:rgba(20,28,45,.3);transform:translateY(-3px);background:rgba(20,28,45,.03)}
.pdx-need__top{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
.pdx-need__n{font-family:var(--serif);font-style:italic;font-size:clamp(26px,2.6vw,36px);color:var(--signal-deep);line-height:1}
.pdx-need__en{font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--on-light-faint);margin-bottom:8px}
.pdx-need h3{font-family:var(--serif);font-weight:500;font-size:clamp(24px,2.4vw,32px);line-height:1.1;color:var(--on-light)}
.pdx-need ul{list-style:none;display:flex;flex-direction:column;gap:8px;margin-top:2px}
.pdx-need ul li{font-size:13.5px;line-height:1.5;color:var(--on-light-mut);padding-left:14px;position:relative}
.pdx-need ul li::before{content:"–";position:absolute;left:0;color:var(--on-light-faint)}
.pdx-need__role{margin-top:auto;padding-top:16px;border-top:1px solid var(--hair);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.pdx-need__role b{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-light);font-weight:600}
.pdx-need__go{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--signal);display:inline-flex;gap:6px;align-items:center}

/* ============================================================
   MATRIX — Integrated Skincare map
   Desktop: label column + 4 aligned need columns (grid-auto-flow:column
   fills 6 shared row tracks, so every row lines up for comparison).
   Mobile (≤1000px): each column collapses into a stacked card; the label
   column hides and per-cell mono labels appear instead.
   ============================================================ */
.pdx-matrix{display:grid;grid-auto-flow:column;grid-template-rows:repeat(6,auto);grid-auto-columns:minmax(0,1fr);
  border:1px solid var(--hair);border-radius:var(--r-lg);overflow:hidden}
.pdx-matrix__labels,.pdx-mcol{display:contents}
.pdx-matrix__labels>div{grid-column:1;padding:16px 14px 16px 20px;font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--on-light-faint);border-top:1px solid var(--hair);display:flex;align-items:flex-start}
.pdx-matrix__labels>div:first-child{border-top:0}
.pdx-matrix{grid-template-columns:118px}
.pdx-mcell{padding:16px 18px;border-top:1px solid var(--hair);border-left:1px solid var(--hair);
  font-size:13px;line-height:1.6;color:var(--on-light-mut);min-width:0}
.pdx-mcol>.pdx-mcell:first-child{border-top:0}
.pdx-mcell .lbl{display:none}
/* column header cell */
.pdx-mhead{background:rgba(20,28,45,.035)}
.pdx-mhead .en{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--on-light-faint);display:block;margin-bottom:5px}
.pdx-mhead .vi{font-family:var(--serif);font-weight:500;font-size:19px;line-height:1.15;color:var(--on-light);display:block}
.pdx-mcol--soon .pdx-mhead{background:rgba(255,214,140,.05)}
/* cell content bits */
.pdx-mcell ul{list-style:none;display:flex;flex-direction:column;gap:6px}
.pdx-mcell ul li{padding-left:12px;position:relative}
.pdx-mcell ul li::before{content:"–";position:absolute;left:0;color:var(--on-light-faint)}
.pdx-mcell .dir{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-light);font-weight:600;margin-bottom:4px}
.pdx-mcell .sub{display:block;font-size:12px;color:var(--on-light-faint)}
.pdx-mcell .blk+.blk{margin-top:12px;padding-top:12px;border-top:1px dashed rgba(20,28,45,.12)}
.pdx-mcell .prod{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--signal);font-weight:600}
.pdx-mcell .prod--soon{color:#ffd98a}
.pdx-mcell .dash{color:var(--on-light-faint)}
@media(max-width:1000px){
  .pdx-matrix{display:flex;flex-direction:column;gap:16px;border:0;border-radius:0;overflow:visible}
  .pdx-matrix__labels{display:none}
  .pdx-mcol{display:block;border:1px solid var(--hair);border-radius:var(--r);overflow:hidden}
  .pdx-mcell{border-left:0}
  .pdx-mcell .lbl{display:block;font-family:var(--mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--on-light-faint);margin-bottom:7px}
}

/* ============================================================
   DETAIL PROTOCOL SECTIONS (firmness / surface / tone / glow)
   ============================================================ */
.pdx-proto{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(28px,4vw,64px);align-items:start}
@media(max-width:860px){.pdx-proto{grid-template-columns:1fr}}
.pdx-proto__aside{display:flex;flex-direction:column;gap:20px}
.pdx-proto__aside .pdx-h4{margin-bottom:0}
.pdx-age{border:1px solid var(--hair);border-radius:var(--r);padding:16px 18px;display:flex;flex-direction:column;gap:2px}
.pdx-age b{font-family:var(--serif);font-style:italic;font-size:20px;color:var(--on-light);font-weight:500}
.pdx-age span{font-size:11.5px;color:var(--on-light-faint)}
/* protocol step cards */
.pdx-steps{display:flex;flex-direction:column;gap:14px}
.pdx-step{border:1px solid var(--hair);border-radius:var(--r);padding:20px 22px;background:var(--card)}
.pdx-step--soon{border-color:rgba(255,214,140,.28);background:rgba(255,214,140,.04)}
.pdx-step__k{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.pdx-step__k b{font-family:var(--mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--on-light-faint);font-weight:600}
.pdx-step h4{font-size:16px;font-weight:500;color:var(--on-light);margin-bottom:6px}
.pdx-step p{font-size:13.5px;line-height:1.6;color:var(--on-light-mut)}
.pdx-step .prod{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--signal);font-weight:600}
.pdx-step .note{display:block;margin-top:8px;font-size:12px;color:var(--on-light-faint)}
.pdx-proto__cta{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap}

/* ============================================================
   PRODUCT ROLE CARDS (STIM / LIFT / GLOW)
   ============================================================ */
.pdx-prods{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:960px){.pdx-prods{grid-template-columns:1fr}}
.pdx-prod{border:1px solid var(--hair);border-radius:var(--r-lg);padding:clamp(24px,3vw,34px);
  display:flex;flex-direction:column;gap:14px;position:relative;overflow:hidden}
.pdx-prod--stim{background:linear-gradient(165deg,rgba(159,192,234,.07),transparent 60%)}
.pdx-prod--lift{background:linear-gradient(165deg,rgba(224,86,110,.07),transparent 60%)}
.pdx-prod--glow{background:linear-gradient(165deg,rgba(255,214,140,.06),transparent 60%)}
.pdx-prod__media{display:flex;align-items:center;justify-content:center;height:170px;position:relative;margin-bottom:4px}
.pdx-prod__media::before{content:"";position:absolute;left:50%;top:50%;width:150px;aspect-ratio:1;transform:translate(-50%,-50%);border-radius:50%}
.pdx-prod--stim .pdx-prod__media::before{background:radial-gradient(circle,rgba(159,192,234,.22),transparent 68%)}
.pdx-prod--lift .pdx-prod__media::before{background:radial-gradient(circle,rgba(224,86,110,.18),transparent 68%)}
.pdx-prod--glow .pdx-prod__media::before{background:radial-gradient(circle,rgba(255,214,140,.14),transparent 68%)}
.pdx-prod__media img{position:relative;z-index:1;max-height:160px;width:auto;filter:drop-shadow(0 20px 34px rgba(0,0,0,.55))}
.pdx-prod__media svg{position:relative;z-index:1;width:110px;height:110px;opacity:.75}
.pdx-prod__media .ring{fill:none;stroke:rgba(255,214,140,.4);stroke-width:.7}
.pdx-prod__media .core{fill:rgba(255,224,170,.8)}
.pdx-prod h3{font-family:var(--serif);font-weight:500;font-size:clamp(24px,2.4vw,30px)}
.pdx-prod h3 b{font-style:italic}
.pdx-prod--stim h3 b{color:var(--signal)}
.pdx-prod--lift h3 b{color:var(--red-soft)}
.pdx-prod--glow h3 b{color:#ffd98a}
.pdx-prod__role{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--on-light-mut)}
.pdx-prod p{font-size:13.5px;line-height:1.65;color:var(--on-light-mut)}
.pdx-prod__where{margin-top:auto;padding-top:16px;border-top:1px solid var(--hair);display:flex;flex-wrap:wrap;gap:8px}
.pdx-prod__where a{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--on-light-mut);
  border:1px solid var(--hair);border-radius:100px;padding:6px 12px;transition:.3s}
.pdx-prod__where a:hover{color:var(--on-light);border-color:rgba(20,28,45,.35)}

/* ============================================================
   FINAL CTA
   ============================================================ */
.pdx-final{position:relative;isolation:isolate;text-align:center;max-width:62ch;margin-inline:auto;display:flex;flex-direction:column;align-items:center;gap:20px}
.pdx-final .pdx-h2{text-align:center;max-width:none}
.pdx-final__orbit{left:50%;top:38%;transform:translate(-50%,-50%);width:min(60vmin,540px);aspect-ratio:1;opacity:.3}
.pdx-final__rule{display:flex;align-items:center;gap:16px;width:100%;max-width:280px;color:var(--on-light-faint);margin:6px 0 2px}
.pdx-final__rule span{flex:1;height:1px;background:var(--hair)}
.pdx-final__cta{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:6px}
.pdx-final__note{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-light-faint);margin-top:4px}

/* ============================================================
   VISUAL ENRICHMENT — stock imagery, product sizing, GLOW atom
   Added in the design-refinement pass. Stock photos are tinted with the
   site's signature mix-blend multiply gradient + dark bottom fade so they
   read as native to the dark microsite rather than dropped-in stock.
   ============================================================ */

/* ---- OVERVIEW need cards — image header band ---- */
.pdx-need{padding:0;gap:0;overflow:hidden}
.pdx-need__media{position:relative;aspect-ratio:16/10;background-size:cover;background-position:center;
  overflow:hidden;filter:saturate(.92)}
.pdx-need__media::before{content:"";position:absolute;inset:0;mix-blend-mode:multiply;opacity:.5;transition:opacity .5s}
.pdx-need--stim .pdx-need__media::before{background:linear-gradient(158deg,#0a3a86,#2a6fdb 62%,#7fa8e8)}
.pdx-need--lift .pdx-need__media::before{background:linear-gradient(158deg,#7a0f26,var(--red) 62%,#e0566e)}
.pdx-need--glow .pdx-need__media::before{background:linear-gradient(158deg,#6b4a12,#c99a3a 58%,#ffd98a)}
.pdx-need__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 38%,rgba(20,28,45,.22))}
.pdx-need:hover .pdx-need__media::before{opacity:.32}
.pdx-need__body{padding:clamp(24px,3vw,36px);display:flex;flex-direction:column;gap:16px;flex:1}
.pdx-tagpill{position:absolute;top:14px;right:15px;z-index:2;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;
  text-transform:uppercase;padding:5px 11px;border-radius:100px;background:rgba(10,13,18,.55);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.18);color:#fff;display:inline-flex;gap:6px;align-items:center}
.pdx-tagpill::before{content:"";width:5px;height:5px;border-radius:50%;flex:none}
.pdx-tagpill.stim::before{background:var(--signal-deep)}
.pdx-tagpill.lift::before{background:var(--red-soft)}
.pdx-tagpill.glow::before{background:#ffd98a}

/* ---- DETAIL protocol sections — editorial figure in the aside column ---- */
.pdx-proto__fig{position:relative;aspect-ratio:5/4;border-radius:var(--r);overflow:hidden;
  border:1px solid var(--hair);background-size:cover;background-position:center;filter:saturate(.92)}
.pdx-proto__fig::before{content:"";position:absolute;inset:0;mix-blend-mode:multiply;opacity:.46}
.pdx-proto__fig--stim::before{background:linear-gradient(150deg,#0a3a86,#2a6fdb 62%,#7fa8e8)}
.pdx-proto__fig--lift::before{background:linear-gradient(150deg,#7a0f26,var(--red) 62%,#e0566e)}
.pdx-proto__fig--glow::before{background:linear-gradient(150deg,#6b4a12,#c99a3a 58%,#ffd98a)}
.pdx-proto__fig::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 48%,rgba(20,28,45,.22))}
@media(max-width:860px){.pdx-proto__fig{aspect-ratio:16/9}}

/* ---- PRODUCT role cards — larger, more present product visuals ---- */
.pdx-prod__media{height:248px;margin-bottom:6px}
.pdx-prod__media::before{width:220px}
.pdx-prod__media img{max-height:236px}
.pdx-prod__media svg{width:158px;height:158px}
/* GLOW atom/flower cue — balanced, evenly-distributed petals + slow spin */
.pdx-atom{transform-origin:50% 50%;animation:pdxAtomSpin 120s linear infinite}
.pdx-prod__media .pdx-atom .ring ellipse{fill:none;stroke:rgba(255,214,140,.42);stroke-width:.7}
.pdx-prod__media .pdx-atom .core{fill:rgba(255,224,170,.85);filter:drop-shadow(0 0 6px rgba(255,214,140,.7))}
@keyframes pdxAtomSpin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.pdx-atom{animation:none}}
@media(max-width:960px){.pdx-prod__media{height:220px}.pdx-prod__media img{max-height:210px}}


/* ============================================================
   LIGHT-MODE CONVERSION (Phương án B) — page flipped from the bespoke dark
   "Integrated Skincare" theme to the light editorial system used across the
   Khám phá / product pages. Overrides sit last so they win the cascade.
   ============================================================ */
body.lightpage{background:var(--paper);color:var(--on-light)}
body.lightpage .world,body.lightpage .grain{display:none}

/* accent recoloring: pale cool "signal" blue was only legible on dark.
   Brand accent = red (matches .em/.serif on the other light pages);
   STIM references = readable blue; status = green; soon = amber. */
.pdx-hero__h em,.pdx-h2 em{color:var(--red)}
.pdx-tag,.pdx-need__go,.pdx-need__n,.pdx-mcell .prod,.pdx-prod--stim h3 b{color:#2a6fdb}
.pdx-ok{color:#1f7a4d;border-color:rgba(31,122,77,.32);background:rgba(31,122,77,.07)}
.pdx-ok::before{background:#1f7a4d}
.pdx-soon{color:#a86f12;border-color:rgba(168,111,18,.32);background:rgba(168,111,18,.08)}
.pdx-soon::before{background:#a86f12}
.pdx-mcell .prod--soon{color:#a86f12}

/* orbit motif → faint dark on light */
.pdx-orbit .ring{stroke:rgba(20,28,45,.12)}
.pdx-orbit .core{fill:rgba(20,28,45,.4)}

/* sticky sub-nav active underline → brand red */
.pdx-subnav a.on{border-color:var(--red)}

/* card surfaces + hover on light */
.pdx-need,.pdx-step,.pdx-prod,.pdx-age{background:var(--card)}
.pdx-need:hover{background:var(--card);border-color:var(--hair-2);box-shadow:0 26px 60px -42px rgba(20,28,45,.4)}
.pdx-need__media::after{background:linear-gradient(180deg,transparent 58%,rgba(20,28,45,.20))}
.pdx-proto__fig::after{background:linear-gradient(180deg,transparent 55%,rgba(20,28,45,.20))}

/* product-role gradient tints kept subtle on white */
.pdx-prod--stim{background:linear-gradient(165deg,rgba(42,111,219,.06),transparent 60%)}
.pdx-prod--lift{background:linear-gradient(165deg,rgba(204,31,60,.06),transparent 60%)}
.pdx-prod--glow{background:linear-gradient(165deg,rgba(168,111,18,.06),transparent 60%)}
.pdx-prod--lift h3 b{color:var(--red)}
.pdx-prod--glow h3 b{color:#a86f12}
.pdx-prod__media img{filter:drop-shadow(0 22px 36px rgba(20,28,45,.22))}

/* ============================================================
   DARK FIRST SECTION — like every Khám phá page, the opening hero (+ its
   breadcrumb) stays dark; content below is light. Scoped to #intro/hero so
   it overrides the light flip above.
   ============================================================ */
.pdx-crumb,.pdx-hero{background:var(--ink)}
.pdx-crumb{padding-bottom:6px}
.pdx-crumb nav{color:var(--on-dark-faint)}
.pdx-crumb a{color:var(--on-dark-mut)}
.pdx-crumb a:hover{color:var(--on-dark)}
.pdx-hero__h{color:var(--on-dark)}
.pdx-hero__h em{color:var(--signal)}
.pdx-hero__lede,.pdx-hero .lede{color:var(--on-dark-mut)}
.pdx-hero .pdx-tag{color:var(--signal)}
.pdx-hero .pdx-orbit .ring{stroke:rgba(159,192,234,.24)}
.pdx-hero .pdx-orbit .core{fill:rgba(207,224,246,.65)}
/* ghost CTA must stay legible on the dark hero */
.pdx-hero .btn--ghost{--fg:#eef2f8;--bd:rgba(207,219,240,.34);background:rgba(8,10,14,.28)}
.pdx-hero .btn--ghost:hover{--bd:rgba(207,219,240,.6);background:rgba(8,10,14,.5)}
/* first content section opens cleanly under the dark hero (no double divider) */
#overview{border-top:0}


/* header white-gutter fix: the breadcrumb ink band must span full width behind
   the fixed (transparent) nav — was constrained to a centred 1280px box. */
.pdx-crumb{max-width:none;margin:0;padding:132px var(--pad) 6px}
.pdx-crumb nav{max-width:var(--wrap);margin-inline:auto}
@media(max-width:760px){.pdx-crumb{padding-top:112px}}

/* matrix — product vial thumbnail inside the "Sản phẩm Acurhyal" cell */
.pdx-mcell .pdx-mimg{height:44px;width:auto;display:block;margin-bottom:9px;filter:drop-shadow(0 8px 14px rgba(20,28,45,.2))}


/* matrix (Bản đồ phác đồ) — READABILITY + BALANCE pass:
   tiny vial thumbnails removed; text enlarged; faint labels darkened to the
   readable 'mut' tone; product name set larger, sentence-case, deeper blue. */
.pdx-mimg{display:none}
.pdx-matrix__labels>div{font-size:10.5px;color:var(--on-light-mut);letter-spacing:.12em}
.pdx-mhead .en{font-size:10px;color:var(--on-light-mut)}
.pdx-mhead .vi{font-size:20px}
.pdx-mcell{font-size:13.5px;line-height:1.62;color:var(--on-light-mut);padding:18px 18px}
.pdx-mcell ul{gap:7px}
.pdx-mcell .dir{font-size:11px;letter-spacing:.1em;color:var(--on-light)}
.pdx-mcell .sub{font-size:12.5px;color:var(--on-light-mut)}
.pdx-mcell .prod{font-family:var(--sans);font-size:15px;font-weight:700;letter-spacing:-.01em;text-transform:none;color:#1f5fc0;padding:0;display:block;align-items:initial}
.pdx-mcell .prod--soon{color:#a86f12}
.pdx-mcell .dash{color:var(--on-light-faint)}
/* center cell content vertically so a short value (product name) doesn't float
   at the top of a tall comparison-aligned row track */
.pdx-mcell{display:flex;flex-direction:column;justify-content:center;gap:6px}
.pdx-mcell.pdx-mhead{justify-content:flex-start}