/* =========================================================
   Snowkin 雪潤泉 — 外泌體面膜  Demo Storefront
   Aesthetic: Aqueous luxury / clinical serenity
   水感藍 × 墨黑 × 珍珠白 · 輕奢明體 + 細緻水波動效
   ========================================================= */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..600;1,9..144,300..500&family=Noto+Serif+TC:wght@300;400;500;600;700&family=Noto+Sans+TC:wght@300;400;500;700&family=Manrope:wght@300;400;500;600;700&display=swap');

/* ---------- Design tokens ---------- */
:root{
  --ink:#0b2733;
  --ink-2:#20424f;
  --muted:#5d7682;
  --line:#e2edf0;
  --line-2:#d2e3e8;

  --aqua-deep:#0e6f8c;
  --aqua:#2399b8;
  --aqua-bright:#5cc4dd;
  --aqua-100:#eaf6f9;
  --aqua-200:#d3ebf1;
  --aqua-300:#b3dde7;

  --pearl:#f5fafb;
  --paper:#ffffff;
  --gold:#b8935c;

  --shadow-sm:0 2px 10px rgba(11,39,51,.06);
  --shadow:0 18px 50px -22px rgba(11,39,51,.30);
  --shadow-lg:0 40px 90px -40px rgba(14,111,140,.45);

  --r-sm:10px; --r:16px; --r-lg:26px; --r-xl:40px;

  --font-display:"Fraunces","Noto Serif TC",serif;
  --font-serif:"Noto Serif TC",serif;
  --font-body:"Manrope","Noto Sans TC",-apple-system,sans-serif;

  --maxw:1240px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--pearl);
  line-height:1.65;
  font-weight:400;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul{list-style:none}
::selection{background:var(--aqua-bright);color:#fff}

/* page atmosphere: faint grain + aqua haze */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(60% 50% at 85% -5%, rgba(92,196,221,.20), transparent 60%),
    radial-gradient(50% 45% at 0% 100%, rgba(35,153,184,.12), transparent 60%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Type scale ---------- */
h1,h2,h3,h4{font-weight:400;line-height:1.12;color:var(--ink);letter-spacing:-.01em}
.display{font-family:var(--font-display);font-optical-sizing:auto}
.serif{font-family:var(--font-serif)}

.eyebrow{
  font-family:var(--font-body);
  font-size:.72rem;font-weight:600;letter-spacing:.32em;text-transform:uppercase;
  color:var(--aqua-deep);display:inline-flex;align-items:center;gap:.7em;
}
.eyebrow::before{content:"";width:30px;height:1px;background:linear-gradient(90deg,var(--aqua),transparent)}
.eyebrow.center::after{content:"";width:30px;height:1px;background:linear-gradient(270deg,var(--aqua),transparent)}

.lead{font-size:1.06rem;color:var(--ink-2);line-height:1.85}
.muted{color:var(--muted)}

/* ---------- Layout ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(20px,5vw,48px)}
section{position:relative}
.section-pad{padding-block:clamp(72px,11vw,140px)}

/* ---------- Buttons ---------- */
.btn{
  --bg:var(--ink);--fg:#fff;
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:1.02em 2em;border-radius:100px;font-weight:600;font-size:.95rem;letter-spacing:.02em;
  background:var(--bg);color:var(--fg);overflow:hidden;isolation:isolate;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
  box-shadow:0 12px 30px -14px rgba(11,39,51,.5);
}
.btn::after{
  content:"";position:absolute;inset:0;z-index:-1;opacity:0;transition:opacity .4s var(--ease);
  background:linear-gradient(120deg,var(--aqua-deep),var(--aqua) 55%,var(--aqua-bright));
}
.btn:hover{transform:translateY(-3px);box-shadow:0 22px 44px -18px rgba(14,111,140,.6)}
.btn:hover::after{opacity:1}
.btn--aqua{--bg:linear-gradient(120deg,var(--aqua-deep),var(--aqua) 60%,var(--aqua-bright))}
.btn--aqua::after{background:var(--ink)}
.btn--ghost{--bg:transparent;--fg:var(--ink);box-shadow:inset 0 0 0 1.4px var(--line-2)}
.btn--ghost::after{background:var(--ink)}
.btn--ghost:hover{--fg:#fff}
.btn--block{width:100%}
.btn--lg{padding:1.18em 2.4em;font-size:1rem}
.btn[disabled]{opacity:.45;pointer-events:none}

.link-underline{position:relative;font-weight:600;color:var(--aqua-deep)}
.link-underline::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1.4px;background:currentColor;transform:scaleX(.25);transform-origin:left;transition:transform .4s var(--ease)}
.link-underline:hover::after{transform:scaleX(1)}

/* =========================================================
   HEADER
   ========================================================= */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .5s var(--ease),box-shadow .5s var(--ease),padding .5s var(--ease);
  padding-block:18px;
}
.site-header.scrolled{
  background:rgba(245,250,251,.82);backdrop-filter:blur(16px) saturate(1.2);
  box-shadow:0 1px 0 var(--line),0 10px 30px -24px rgba(11,39,51,.4);
  padding-block:12px;
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;letter-spacing:.04em}
.brand-mark{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;flex:none;
  background:linear-gradient(140deg,var(--aqua-deep),var(--aqua-bright));color:#fff;
  font-family:var(--font-display);font-size:1.18rem;font-weight:500;
  box-shadow:inset 0 0 0 4px rgba(255,255,255,.18),0 8px 18px -10px rgba(14,111,140,.7);
}
.brand-name{font-family:var(--font-display);font-size:1.34rem;font-weight:500;line-height:1}
.brand-sub{display:block;font-family:var(--font-serif);font-size:.66rem;letter-spacing:.5em;color:var(--muted);margin-top:3px}

.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-size:.92rem;font-weight:500;color:var(--ink-2);position:relative;padding:4px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1.5px;background:var(--aqua);transform:scaleX(0);transform-origin:right;transition:transform .35s var(--ease)}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a:hover::after,.nav-links a[aria-current="page"]::after{transform:scaleX(1);transform-origin:left}

.nav-actions{display:flex;align-items:center;gap:10px}
.icon-btn{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:var(--ink);transition:background .3s,color .3s;position:relative}
.icon-btn:hover{background:rgba(35,153,184,.12);color:var(--aqua-deep)}
.icon-btn svg{width:21px;height:21px}
.cart-count{
  position:absolute;top:4px;right:3px;min-width:18px;height:18px;padding:0 5px;border-radius:10px;
  background:var(--aqua-deep);color:#fff;font-size:.66rem;font-weight:700;display:grid;place-items:center;
  transform:scale(0);transition:transform .35s var(--ease)
}
.cart-count.show{transform:scale(1)}
.nav-toggle{display:none}

/* mobile menu */
.mobile-menu{position:fixed;inset:0;z-index:99;background:var(--pearl);transform:translateY(-100%);transition:transform .55s var(--ease);display:flex;flex-direction:column;justify-content:center;padding:0 8vw;gap:6px}
.mobile-menu.open{transform:translateY(0)}
.mobile-menu a{font-family:var(--font-display);font-size:2.4rem;font-weight:400;padding:.3em 0;border-bottom:1px solid var(--line);color:var(--ink)}
.mobile-menu a span{font-size:.8rem;font-family:var(--font-body);color:var(--muted);letter-spacing:.2em;margin-left:.6em}

/* =========================================================
   HERO
   ========================================================= */
.hero{position:relative;padding-top:148px;padding-bottom:90px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:-1;overflow:hidden}
.hero-bg .blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.6;animation:drift 18s ease-in-out infinite}
.hero-bg .b1{width:560px;height:560px;background:radial-gradient(circle,var(--aqua-300),transparent 70%);top:-160px;right:-120px}
.hero-bg .b2{width:440px;height:440px;background:radial-gradient(circle,rgba(92,196,221,.5),transparent 70%);bottom:-160px;left:-100px;animation-delay:-7s}
.hero-bg .b3{width:300px;height:300px;background:radial-gradient(circle,rgba(184,147,92,.18),transparent 70%);top:40%;left:50%;animation-delay:-12s}

.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(30px,5vw,72px);align-items:center}
.hero-copy{max-width:560px}
.hero h1{font-family:var(--font-serif);font-size:clamp(2.6rem,6vw,4.6rem);font-weight:500;letter-spacing:.01em;margin:.32em 0 .28em}
.hero h1 em{font-family:var(--font-display);font-style:italic;font-weight:400;color:var(--aqua-deep)}
.hero .lead{max-width:46ch}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 14px;margin:30px 0 36px}
.chip{display:inline-flex;align-items:center;gap:.5em;font-size:.82rem;font-weight:600;color:var(--ink-2);background:var(--paper);border:1px solid var(--line);padding:.55em 1.05em;border-radius:100px;box-shadow:var(--shadow-sm)}
.chip svg{width:15px;height:15px;color:var(--aqua-deep)}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px 22px}
.hero-price{display:flex;align-items:baseline;gap:.4em}
.hero-price .cur{font-size:1rem;color:var(--muted);font-weight:600}
.hero-price .amt{font-family:var(--font-display);font-size:2.1rem;font-weight:500;color:var(--ink)}
.hero-price .per{font-size:.85rem;color:var(--muted)}

/* hero product stage */
.hero-stage{position:relative;display:grid;place-items:center;min-height:440px}
.hero-disc{position:absolute;width:min(420px,80%);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 38% 32%,#fff,var(--aqua-100) 45%,var(--aqua-200) 100%);
  box-shadow:var(--shadow-lg),inset 0 0 60px rgba(255,255,255,.7);}
.hero-disc::after{content:"";position:absolute;inset:14px;border-radius:50%;border:1px dashed rgba(35,153,184,.35);animation:spin 40s linear infinite}
.hero-product{position:relative;z-index:2;width:min(290px,62%);border-radius:18px;
  box-shadow:0 50px 80px -30px rgba(14,111,140,.6),0 10px 24px -12px rgba(11,39,51,.4);
  animation:floaty 7s ease-in-out infinite;transform-origin:center}
.hero-tag{position:absolute;z-index:3;background:var(--paper);border:1px solid var(--line);border-radius:14px;
  padding:.7em 1em;box-shadow:var(--shadow);font-size:.78rem;font-weight:600;line-height:1.3;animation:floaty 7s ease-in-out infinite}
.hero-tag b{display:block;font-family:var(--font-display);font-size:1.35rem;color:var(--aqua-deep);font-weight:500}
.hero-tag.t1{top:8%;left:-4%;animation-delay:-2s}
.hero-tag.t2{bottom:12%;right:-6%;animation-delay:-4s}
.side-label{position:absolute;right:-6px;top:50%;writing-mode:vertical-rl;transform:translateY(-50%);
  font-size:.7rem;letter-spacing:.5em;color:var(--muted);font-weight:600;text-transform:uppercase}

/* =========================================================
   MARQUEE
   ========================================================= */
.marquee{border-block:1px solid var(--line);background:rgba(255,255,255,.5);overflow:hidden;padding-block:20px}
.marquee-track{display:flex;gap:56px;white-space:nowrap;width:max-content;animation:marquee 28s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee-track span{font-family:var(--font-display);font-size:1.15rem;font-style:italic;color:var(--ink-2);display:inline-flex;align-items:center;gap:56px}
.marquee-track span::after{content:"✦";color:var(--aqua);font-style:normal;font-size:.8rem}

/* =========================================================
   GENERIC SECTION HEAD
   ========================================================= */
.section-head{max-width:640px;margin-bottom:clamp(40px,6vw,68px)}
.section-head.center{margin-inline:auto;text-align:center}
.section-head h2{font-family:var(--font-serif);font-size:clamp(2rem,4.4vw,3.2rem);font-weight:500;margin:.45em 0 .35em;letter-spacing:.01em}
.section-head h2 em{font-family:var(--font-display);font-style:italic;color:var(--aqua-deep)}

/* ---------- Efficacy ---------- */
.efficacy{background:linear-gradient(180deg,transparent,rgba(255,255,255,.6) 30%,rgba(255,255,255,.6) 70%,transparent)}
.efficacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.eff-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:34px 28px 30px;position:relative;overflow:hidden;transition:transform .5s var(--ease),box-shadow .5s var(--ease),border-color .5s}
.eff-card::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--aqua-deep),var(--aqua-bright));transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.eff-card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.eff-card:hover::before{transform:scaleX(1)}
.eff-num{font-family:var(--font-display);font-size:1rem;font-weight:600;color:var(--aqua-deep);letter-spacing:.1em}
.eff-ico{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;margin:18px 0 18px;background:var(--aqua-100);color:var(--aqua-deep)}
.eff-ico svg{width:27px;height:27px}
.eff-card h3{font-family:var(--font-serif);font-size:1.28rem;font-weight:600;margin-bottom:.5em}
.eff-card p{font-size:.92rem;color:var(--muted);line-height:1.75}

/* ---------- Split editorial (science / model) ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,6vw,84px);align-items:center}
.split.rev .split-media{order:2}
.split-media{position:relative;border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:4/5}
.split-media img{width:100%;height:100%;object-fit:cover;object-position:top center;transition:transform 1.2s var(--ease)}
.split-media:hover img{transform:scale(1.05)}
.split-media .badge{position:absolute;left:22px;bottom:22px;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);border-radius:14px;padding:.8em 1.1em;box-shadow:var(--shadow-sm)}
.split-media .badge b{font-family:var(--font-display);font-size:1.7rem;color:var(--aqua-deep);display:block;line-height:1}
.split-media .badge span{font-size:.78rem;color:var(--ink-2);font-weight:600}
.feature-list{margin-top:26px;display:flex;flex-direction:column;gap:18px}
.feature-list li{display:flex;gap:16px;align-items:flex-start}
.feature-list .fi{flex:none;width:40px;height:40px;border-radius:12px;background:var(--aqua-100);color:var(--aqua-deep);display:grid;place-items:center;font-family:var(--font-display);font-weight:600}
.feature-list h4{font-family:var(--font-serif);font-size:1.12rem;font-weight:600;margin-bottom:.2em}
.feature-list p{font-size:.9rem;color:var(--muted);line-height:1.7}

/* ---------- Ingredients ---------- */
.ingredients{background:linear-gradient(160deg,var(--ink),#0a3140 70%,var(--aqua-deep));color:#dcebf0;overflow:hidden}
.ingredients .eyebrow{color:var(--aqua-bright)}
.ingredients .eyebrow::before{background:linear-gradient(90deg,var(--aqua-bright),transparent)}
.ingredients .section-head h2{color:#fff}
.ingredients .section-head h2 em{color:var(--aqua-bright)}
.ing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.ing-card{position:relative;border-radius:var(--r-lg);padding:30px 26px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);backdrop-filter:blur(6px);transition:background .5s,transform .5s var(--ease)}
.ing-card:hover{background:rgba(92,196,221,.14);transform:translateY(-6px)}
.ing-card .n{font-family:var(--font-display);font-size:2.4rem;font-weight:300;color:var(--aqua-bright);line-height:1;opacity:.8}
.ing-card h4{font-family:var(--font-serif);color:#fff;font-size:1.3rem;font-weight:600;margin:.5em 0 .4em}
.ing-card p{font-size:.88rem;color:#a8c6d0;line-height:1.7}
.ing-card .en{font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--aqua-bright);opacity:.75;margin-top:1em;display:block}

/* ---------- Stat band ---------- */
.stat{text-align:center}
.stat-num{font-family:var(--font-display);font-weight:300;font-size:clamp(5rem,18vw,12rem);line-height:.9;background:linear-gradient(160deg,var(--aqua-deep),var(--aqua-bright));-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:-.02em}
.stat-num sup{font-size:.34em;vertical-align:super;font-weight:400}
.stat p{font-family:var(--font-serif);font-size:1.3rem;color:var(--ink-2);max-width:30ch;margin:.4em auto 0}
.stat-row{display:flex;justify-content:center;flex-wrap:wrap;gap:clamp(28px,6vw,80px);margin-top:54px}
.stat-row .item b{font-family:var(--font-display);font-size:2.6rem;font-weight:400;color:var(--ink);display:block;line-height:1}
.stat-row .item span{font-size:.88rem;color:var(--muted);font-weight:500;letter-spacing:.05em}

/* ---------- Steps ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step{position:relative;padding-top:30px}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--font-display);font-size:3.4rem;font-weight:300;color:var(--aqua-200);line-height:.8;display:block;margin-bottom:.2em}
.step h4{font-family:var(--font-serif);font-size:1.25rem;font-weight:600;margin-bottom:.4em}
.step p{color:var(--muted);font-size:.92rem;line-height:1.75}
.step:not(:last-child)::after{content:"";position:absolute;top:14px;right:-12px;width:24px;height:1px;background:var(--line-2)}

/* ---------- Testimonials ---------- */
.testimonials{background:linear-gradient(180deg,rgba(255,255,255,.55),transparent)}
.tst-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tst{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 30px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:16px}
.tst .stars{color:var(--gold);letter-spacing:.15em;font-size:.95rem}
.tst p{font-family:var(--font-serif);font-size:1.06rem;color:var(--ink-2);line-height:1.8;flex:1}
.tst .who{display:flex;align-items:center;gap:12px}
.tst .av{width:42px;height:42px;border-radius:50%;background:linear-gradient(140deg,var(--aqua-deep),var(--aqua-bright));color:#fff;display:grid;place-items:center;font-family:var(--font-serif);font-weight:600}
.tst .who b{font-size:.92rem;display:block}
.tst .who span{font-size:.78rem;color:var(--muted)}

/* ---------- CTA band ---------- */
.cta-band{position:relative;border-radius:var(--r-xl);overflow:hidden;background:linear-gradient(135deg,var(--ink),var(--aqua-deep));color:#fff;padding:clamp(46px,7vw,86px);text-align:center}
.cta-band::before{content:"";position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(92,196,221,.5),transparent 70%);top:-200px;right:-120px}
.cta-band::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(35,153,184,.4),transparent 70%);bottom:-200px;left:-120px}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{font-family:var(--font-serif);color:#fff;font-size:clamp(1.9rem,4.5vw,3rem);font-weight:500;margin-bottom:.4em}
.cta-band p{color:#bfe0e9;max-width:46ch;margin:0 auto 32px;font-size:1.02rem}
.cta-band .btn{--bg:#fff;--fg:var(--ink)}
.cta-band .btn::after{background:var(--aqua-bright)}
.cta-band .btn:hover{--fg:var(--ink)}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer{background:var(--ink);color:#9db8c1;padding-block:clamp(56px,8vw,88px) 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px}
.site-footer .brand-name{color:#fff}
.site-footer .brand-sub{color:#6f93a0}
.footer-about{max-width:34ch;font-size:.92rem;line-height:1.8;margin-top:20px;color:#88a6b1}
.footer-col h5{color:#fff;font-family:var(--font-serif);font-weight:600;font-size:1.05rem;margin-bottom:18px}
.footer-col a{display:block;font-size:.9rem;padding:6px 0;color:#9db8c1;transition:color .3s,padding-left .3s}
.footer-col a:hover{color:var(--aqua-bright);padding-left:5px}
.footer-news p{font-size:.9rem;margin-bottom:14px}
.news-form{display:flex;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:100px;padding:5px 5px 5px 18px}
.news-form input{flex:1;background:none;border:none;color:#fff;font-family:inherit;font-size:.88rem;outline:none}
.news-form input::placeholder{color:#6f93a0}
.news-form button{width:40px;height:40px;border-radius:50%;background:var(--aqua);color:#fff;display:grid;place-items:center;flex:none;transition:background .3s}
.news-form button:hover{background:var(--aqua-bright)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:54px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-size:.8rem;color:#6f93a0}

/* =========================================================
   SHOP / PRODUCT GRID
   ========================================================= */
.page-hero{padding-top:140px;padding-bottom:20px;text-align:center}
.page-hero .eyebrow{justify-content:center}
.page-hero h1{font-family:var(--font-serif);font-size:clamp(2.4rem,6vw,4rem);font-weight:500;margin:.3em 0}
.crumbs{font-size:.82rem;color:var(--muted);margin-bottom:8px}
.crumbs a:hover{color:var(--aqua-deep)}

.shop-bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;margin-bottom:34px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.shop-bar .count{font-size:.9rem;color:var(--muted)}
.shop-bar select{font-family:inherit;font-size:.88rem;border:1px solid var(--line-2);border-radius:100px;padding:.6em 2.4em .6em 1.2em;background:var(--paper);color:var(--ink);
  appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%235d7682' stroke-width='2'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1.1em center}

.products{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;transition:transform .5s var(--ease),box-shadow .5s var(--ease);display:flex;flex-direction:column}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.card-media{position:relative;aspect-ratio:1;background:linear-gradient(160deg,var(--aqua-100),var(--aqua-200));display:grid;place-items:center;overflow:hidden}
.card-media img{width:72%;height:auto;filter:drop-shadow(0 24px 36px rgba(14,111,140,.4));transition:transform .7s var(--ease)}
.card:hover .card-media img{transform:translateY(-6px) scale(1.04)}
.card-flag{position:absolute;top:14px;left:14px;background:var(--ink);color:#fff;font-size:.68rem;font-weight:700;letter-spacing:.12em;padding:.45em .9em;border-radius:100px;text-transform:uppercase}
.card-flag.soon{background:rgba(255,255,255,.85);color:var(--muted);backdrop-filter:blur(4px)}
.card-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.card-body .ser{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--aqua-deep);font-weight:700;margin-bottom:8px}
.card-body h3{font-family:var(--font-serif);font-size:1.3rem;font-weight:600;line-height:1.3;margin-bottom:6px}
.card-body .desc{font-size:.86rem;color:var(--muted);line-height:1.6;margin-bottom:18px;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px}
.price{font-family:var(--font-display);font-size:1.4rem;font-weight:500;color:var(--ink)}
.price .cur{font-size:.7em;color:var(--muted);font-weight:600;margin-right:2px}
.card .add{width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;flex:none;transition:transform .4s var(--ease),background .4s}
.card .add:hover{background:linear-gradient(120deg,var(--aqua-deep),var(--aqua-bright));transform:rotate(90deg)}
.card.disabled .card-media{filter:saturate(.5) opacity(.85)}

/* =========================================================
   PRODUCT DETAIL
   ========================================================= */
.pd{padding-top:130px}
.pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:start}
.pd-gallery{position:sticky;top:100px}
.pd-main{position:relative;border-radius:var(--r-xl);overflow:hidden;background:linear-gradient(160deg,var(--aqua-100),var(--aqua-200));aspect-ratio:1;display:grid;place-items:center}
.pd-main img{width:64%;filter:drop-shadow(0 40px 60px rgba(14,111,140,.45));animation:floaty 7s ease-in-out infinite}
.pd-main .flag{position:absolute;top:18px;left:18px;background:var(--ink);color:#fff;font-size:.7rem;font-weight:700;letter-spacing:.12em;padding:.5em 1em;border-radius:100px}
.pd-thumbs{display:flex;gap:12px;margin-top:14px}
.pd-thumbs button{flex:1;aspect-ratio:1;border-radius:var(--r);overflow:hidden;border:1.5px solid var(--line);background:linear-gradient(160deg,var(--aqua-100),var(--aqua-200));display:grid;place-items:center;transition:border-color .3s}
.pd-thumbs button.active{border-color:var(--aqua-deep)}
.pd-thumbs button img{width:70%}
.pd-thumbs button.photo{padding:0}
.pd-thumbs button.photo img{width:100%;height:100%;object-fit:cover}

.pd-info .ser{font-size:.74rem;letter-spacing:.22em;text-transform:uppercase;color:var(--aqua-deep);font-weight:700}
.pd-info h1{font-family:var(--font-serif);font-size:clamp(1.9rem,4vw,2.9rem);font-weight:500;margin:.3em 0 .25em;line-height:1.18}
.pd-info .sub{font-family:var(--font-display);font-style:italic;color:var(--muted);font-size:1.05rem;margin-bottom:18px}
.pd-rating{display:flex;align-items:center;gap:10px;margin-bottom:22px;font-size:.86rem;color:var(--muted)}
.pd-rating .stars{color:var(--gold);letter-spacing:.1em}
.pd-price{display:flex;align-items:baseline;gap:.4em;margin-bottom:22px}
.pd-price .cur{color:var(--muted);font-weight:600}
.pd-price .amt{font-family:var(--font-display);font-size:2.4rem;font-weight:500}
.pd-price .per{font-size:.86rem;color:var(--muted)}
.pd-desc{color:var(--ink-2);line-height:1.85;margin-bottom:26px;max-width:48ch}
.pd-specs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.pd-specs .s{font-size:.82rem;font-weight:600;color:var(--ink-2);background:var(--aqua-100);padding:.5em 1em;border-radius:100px}

.buy-row{display:flex;gap:14px;align-items:stretch;margin-bottom:18px}
.qty{display:flex;align-items:center;border:1.5px solid var(--line-2);border-radius:100px;overflow:hidden}
.qty button{width:46px;height:100%;display:grid;place-items:center;font-size:1.2rem;color:var(--ink-2);transition:background .3s}
.qty button:hover{background:var(--aqua-100)}
.qty input{width:42px;text-align:center;border:none;background:none;font-family:var(--font-display);font-size:1.1rem;font-weight:500;outline:none;color:var(--ink)}
.buy-row .btn{flex:1}
.pd-assure{display:flex;flex-direction:column;gap:10px;margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}
.pd-assure li{display:flex;gap:10px;align-items:center;font-size:.88rem;color:var(--ink-2)}
.pd-assure svg{width:18px;height:18px;color:var(--aqua-deep);flex:none}

/* tabs */
.pd-tabs{margin-top:clamp(56px,8vw,96px)}
.tab-nav{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:30px;flex-wrap:wrap}
.tab-nav button{font-family:var(--font-serif);font-size:1.05rem;font-weight:600;color:var(--muted);padding:.7em 1.2em;position:relative;transition:color .3s}
.tab-nav button.active{color:var(--ink)}
.tab-nav button::after{content:"";position:absolute;left:0;bottom:-1px;width:100%;height:2px;background:var(--aqua-deep);transform:scaleX(0);transition:transform .35s var(--ease)}
.tab-nav button.active::after{transform:scaleX(1)}
.tab-panel{display:none;animation:fade .5s var(--ease)}
.tab-panel.active{display:block}
.tab-panel .cols{columns:2;column-gap:48px;color:var(--ink-2);line-height:1.9}
.tab-panel h4{font-family:var(--font-serif);font-size:1.2rem;margin:0 0 .6em;color:var(--ink)}
.tab-panel ul.dots li{position:relative;padding-left:1.4em;margin-bottom:.6em;color:var(--ink-2)}
.tab-panel ul.dots li::before{content:"";position:absolute;left:0;top:.7em;width:7px;height:7px;border-radius:50%;background:var(--aqua)}
.tab-panel ul.dots b{color:var(--ink)}
.ing-table{font-size:.82rem;color:var(--muted);line-height:1.9;background:var(--aqua-100);padding:22px 26px;border-radius:var(--r);margin-top:18px}

/* =========================================================
   CART
   ========================================================= */
.cart-wrap{padding-top:130px}
.cart-grid{display:grid;grid-template-columns:1.6fr .9fr;gap:40px;align-items:start}
.cart-list{display:flex;flex-direction:column;gap:0}
.cart-item{display:grid;grid-template-columns:96px 1fr auto;gap:20px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line)}
.cart-item:first-child{border-top:1px solid var(--line)}
.ci-media{width:96px;height:96px;border-radius:var(--r);background:linear-gradient(160deg,var(--aqua-100),var(--aqua-200));display:grid;place-items:center}
.ci-media img{width:72%}
.ci-info .ser{font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;color:var(--aqua-deep);font-weight:700}
.ci-info h4{font-family:var(--font-serif);font-size:1.16rem;font-weight:600;margin:.2em 0}
.ci-info .meta{font-size:.82rem;color:var(--muted)}
.ci-info .rm{font-size:.8rem;color:var(--muted);margin-top:8px;transition:color .3s}
.ci-info .rm:hover{color:#c0392b}
.ci-right{display:flex;flex-direction:column;align-items:flex-end;gap:14px}
.ci-price{font-family:var(--font-display);font-size:1.2rem;font-weight:500}
.cart-empty{text-align:center;padding:60px 0}
.cart-empty .ico{width:80px;height:80px;border-radius:50%;background:var(--aqua-100);color:var(--aqua-deep);display:grid;place-items:center;margin:0 auto 24px}
.cart-empty h3{font-family:var(--font-serif);font-size:1.6rem;margin-bottom:10px}
.cart-empty p{color:var(--muted);margin-bottom:24px}

.summary{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 30px;position:sticky;top:100px;box-shadow:var(--shadow-sm)}
.summary h3{font-family:var(--font-serif);font-size:1.4rem;font-weight:600;margin-bottom:22px}
.summary .row{display:flex;justify-content:space-between;padding:11px 0;font-size:.92rem;color:var(--ink-2)}
.summary .row.total{border-top:1px solid var(--line);margin-top:10px;padding-top:18px;font-size:1.05rem;color:var(--ink);font-weight:600}
.summary .row.total b{font-family:var(--font-display);font-size:1.6rem;font-weight:500}
.summary .free{color:var(--aqua-deep);font-weight:600}
.summary .btn{margin-top:22px}
.summary .note{font-size:.78rem;color:var(--muted);text-align:center;margin-top:14px}
.promo{display:flex;gap:8px;margin:18px 0 6px}
.promo input{flex:1;border:1px solid var(--line-2);border-radius:100px;padding:.7em 1.1em;font-family:inherit;font-size:.86rem;outline:none}
.promo input:focus{border-color:var(--aqua)}
.promo button{padding:0 1.2em;border-radius:100px;background:var(--aqua-100);color:var(--aqua-deep);font-weight:600;font-size:.84rem}

/* =========================================================
   CHECKOUT
   ========================================================= */
.checkout-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:start}
.form-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(26px,4vw,40px);box-shadow:var(--shadow-sm);margin-bottom:24px}
.form-card h3{font-family:var(--font-serif);font-size:1.3rem;font-weight:600;margin-bottom:6px;display:flex;align-items:center;gap:12px}
.form-card h3 .n{width:30px;height:30px;border-radius:50%;background:var(--aqua-deep);color:#fff;display:grid;place-items:center;font-family:var(--font-display);font-size:.95rem;flex:none}
.form-card > p.hint{font-size:.85rem;color:var(--muted);margin:0 0 22px 42px}
.field{margin-bottom:18px}
.field label{display:block;font-size:.84rem;font-weight:600;color:var(--ink-2);margin-bottom:7px}
.field label .req{color:#c0392b}
.field input,.field select,.field textarea{width:100%;border:1.5px solid var(--line-2);border-radius:var(--r-sm);padding:.85em 1.1em;font-family:inherit;font-size:.95rem;color:var(--ink);background:var(--paper);outline:none;transition:border-color .3s,box-shadow .3s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--aqua);box-shadow:0 0 0 3px rgba(35,153,184,.14)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pay-opts{display:flex;flex-direction:column;gap:12px}
.pay-opt{display:flex;align-items:center;gap:14px;border:1.5px solid var(--line-2);border-radius:var(--r);padding:16px 18px;cursor:pointer;transition:border-color .3s,background .3s}
.pay-opt:hover{border-color:var(--aqua-300)}
.pay-opt.sel{border-color:var(--aqua-deep);background:var(--aqua-100)}
.pay-opt input{accent-color:var(--aqua-deep);width:18px;height:18px}
.pay-opt .pi{width:42px;height:42px;border-radius:10px;background:var(--aqua-100);color:var(--aqua-deep);display:grid;place-items:center;flex:none}
.pay-opt.sel .pi{background:#fff}
.pay-opt b{font-size:.95rem;display:block}
.pay-opt span{font-size:.8rem;color:var(--muted)}
.co-summary .ci{display:flex;gap:14px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
.co-summary .ci .m{width:60px;height:60px;border-radius:12px;background:linear-gradient(160deg,var(--aqua-100),var(--aqua-200));display:grid;place-items:center;flex:none}
.co-summary .ci .m img{width:72%}
.co-summary .ci .t{flex:1;font-size:.9rem}
.co-summary .ci .t b{font-family:var(--font-serif);font-weight:600}
.co-summary .ci .p{font-family:var(--font-display);font-weight:500}
.demo-banner{background:linear-gradient(120deg,var(--aqua-100),#fff);border:1px dashed var(--aqua-300);border-radius:var(--r);padding:16px 18px;font-size:.84rem;color:var(--ink-2);margin-bottom:24px;display:flex;gap:12px;align-items:flex-start}
.demo-banner svg{width:20px;height:20px;color:var(--aqua-deep);flex:none;margin-top:2px}

/* =========================================================
   TOAST
   ========================================================= */
.toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,140%);z-index:200;background:var(--ink);color:#fff;border-radius:100px;padding:.9em 1.6em;font-size:.9rem;font-weight:500;box-shadow:var(--shadow);display:flex;align-items:center;gap:10px;transition:transform .5s var(--ease)}
.toast.show{transform:translate(-50%,0)}
.toast svg{width:18px;height:18px;color:var(--aqua-bright)}

/* =========================================================
   REVEAL + KEYFRAMES
   ========================================================= */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}.reveal[data-d="4"]{transition-delay:.32s}
.reveal[data-d="5"]{transition-delay:.4s}.reveal[data-d="6"]{transition-delay:.48s}

/* 尊重使用者「減少動態」設定：直接顯示內容、關閉裝飾動畫 */
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  .hero-product,.pd-main img,.hero-disc::after,.marquee-track,.hero-bg .blob{animation:none!important}
  html{scroll-behavior:auto}
}

@keyframes floaty{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-16px) rotate(-1deg)}}
@keyframes drift{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(40px,-30px) scale(1.08)}66%{transform:translate(-30px,20px) scale(.96)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes marquee{to{transform:translateX(-50%)}}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1080px){
  .efficacy-grid{grid-template-columns:repeat(2,1fr)}
  .ing-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:grid}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-stage{order:-1;min-height:360px}
  .split{grid-template-columns:1fr;gap:36px}
  .split.rev .split-media{order:0}
  .pd-grid{grid-template-columns:1fr}
  .pd-gallery{position:static}
  .cart-grid,.checkout-grid{grid-template-columns:1fr}
  .summary{position:static}
  .products{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:1fr;gap:30px}
  .step:not(:last-child)::after{display:none}
  .tst-grid{grid-template-columns:1fr}
  .stat-row{gap:30px}
}
@media (max-width:560px){
  .efficacy-grid,.ing-grid,.products{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .tab-panel .cols{columns:1}
  .cart-item{grid-template-columns:72px 1fr;gap:14px}
  .ci-right{grid-column:2;flex-direction:row;justify-content:space-between;width:100%}
  .hero-meta .chip{font-size:.76rem}
}