/* ---------- tokens (theme vars --bg --bg2 --fg --muted --accent are overridden per product) ---------- */
:root{--bg:#0b0b0d;--bg2:#16161a;--fg:#f5f5f7;--muted:#8e8e93;--accent:#e8b46a;
--font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI Variable Display","Segoe UI","Helvetica Neue","PingFang TC","Hiragino Sans TC","Noto Sans TC","Microsoft JhengHei",system-ui,sans-serif;
--ease:cubic-bezier(.22,1,.36,1);
--pad:clamp(24px,7vw,120px);
--hair:color-mix(in srgb,var(--fg) 12%,transparent);
--glass:color-mix(in srgb,var(--bg2) 68%,transparent);
--shadow:0 1px 0 color-mix(in srgb,#fff 10%,transparent) inset,0 18px 50px -12px rgba(0,0,0,.22)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--font);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden;transition:background .8s}
a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}
button{-webkit-tap-highlight-color:transparent}
ul{list-style:none}
::selection{background:color-mix(in srgb,var(--accent) 30%,transparent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
/* CJK headings: keep words intact, proportional punctuation, balanced lines */
h1,h2,h3{font-feature-settings:"palt";text-wrap:balance;word-break:keep-all;overflow-wrap:anywhere}
p{text-wrap:pretty}

/* ---------- canvas + loader ---------- */
#gl{position:fixed;inset:0;width:100vw;height:100vh;height:100lvh;display:block;z-index:0;touch-action:pan-y}
body.focus #gl{touch-action:none}
#loader{position:fixed;inset:0;z-index:50;display:grid;place-items:center;align-content:center;gap:22px;background:var(--bg);transition:opacity .9s var(--ease),visibility .9s}
body:not(.is-loading) #loader{opacity:0;visibility:hidden}
.loader-mark{width:30px;height:30px;border-radius:50%;border:1.5px solid color-mix(in srgb,var(--fg) 18%,transparent);border-top-color:var(--fg);animation:spin .9s linear infinite}
.loader-bar{width:120px;height:2px;background:color-mix(in srgb,var(--fg) 10%,transparent);border-radius:2px;overflow:hidden}
.loader-bar i{display:block;height:100%;width:0;background:var(--fg);transition:width .3s var(--ease)}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:20;height:48px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
padding:0 max(var(--pad),env(safe-area-inset-right)) 0 max(var(--pad),env(safe-area-inset-left));
backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);background:color-mix(in srgb,var(--bg) 72%,transparent);border-bottom:1px solid color-mix(in srgb,var(--fg) 7%,transparent);transition:opacity .5s}
.brand{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:17px;letter-spacing:-.02em;justify-self:start}
.brand b{font-weight:400;font-size:18px;line-height:1}
.nav-links{display:flex;gap:34px;font-size:12px;letter-spacing:.01em;color:color-mix(in srgb,var(--fg) 72%,transparent)}
.nav-links a{transition:color .2s}.nav-links a:hover{color:var(--fg)}
.nav-buy{justify-self:end;position:relative;font-size:12px;font-weight:500;line-height:1;padding:7px 14px;border-radius:980px;background:var(--fg);color:var(--bg);transition:opacity .2s}
.nav-buy:hover{opacity:.85}
.nav-buy::after{content:"";position:absolute;inset:-8px -6px}/* 44px touch target */

/* ---------- layout ---------- */
main{position:relative;z-index:2;pointer-events:none;transition:opacity .6s var(--ease)}
main a,main button,.product-switch{pointer-events:auto}
section{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:120px var(--pad)}
.eyebrow{font-size:14px;font-weight:600;color:var(--accent);letter-spacing:.04em;margin-bottom:12px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;background:var(--fg);color:var(--bg);font-size:16px;font-weight:500;letter-spacing:.01em;padding:0 24px;border-radius:980px;transition:transform .45s var(--ease),opacity .25s}
.btn:hover{opacity:.88}.btn:active{transform:scale(.97)}
.btn-lg{min-height:54px;font-size:17px;padding:0 34px}
.link{display:inline-flex;align-items:center;min-height:44px;color:var(--accent);font-size:17px;font-weight:500}
.link:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- hero (text left, product right on desktop) ---------- */
.hero{position:relative;justify-content:center;padding-top:96px}
.hero-copy{max-width:min(560px,44vw)}
.hero h1{font-size:clamp(60px,8.6vw,128px);font-weight:700;letter-spacing:-.05em;line-height:.94;margin-left:-.04em}
.tagline{font-size:clamp(21px,2.1vw,30px);font-weight:500;line-height:1.3;color:var(--muted);margin-top:22px;letter-spacing:-.005em}
.hero-cta{display:flex;align-items:center;flex-wrap:wrap;gap:8px 28px;margin-top:36px}
.hero-price{font-size:14px;color:var(--muted);margin-top:14px;letter-spacing:.01em}
.scroll-cue{position:absolute;left:var(--pad);bottom:40px;display:flex;align-items:center;gap:12px;color:var(--muted)}
.scroll-cue span{position:relative;width:1px;height:38px;background:var(--hair);overflow:hidden}
.scroll-cue span::after{content:"";position:absolute;left:0;top:0;width:1px;height:14px;background:var(--fg);animation:cue 2s var(--ease) infinite}
.scroll-cue em{font-style:normal;font-size:12px;letter-spacing:.12em}
@keyframes cue{0%{transform:translateY(-14px)}100%{transform:translateY(38px)}}

/* ---------- story (editorial left column) ---------- */
.story{min-height:130vh;padding-top:0;padding-bottom:0}
.story .inner{max-width:min(500px,38vw)}
.story .num{display:flex;align-items:center;gap:14px;font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.16em;font-variant-numeric:tabular-nums;margin-bottom:22px}
.story .num::after{content:"";width:48px;height:1px;background:var(--hair)}
.story h2{font-size:clamp(40px,4.4vw,64px);font-weight:700;letter-spacing:-.02em;line-height:1.08}
.story h2+p{font-size:clamp(18px,1.45vw,21px);line-height:1.65;color:var(--muted);margin-top:22px;font-weight:400;letter-spacing:.01em;max-width:30em}
.reveal{opacity:0;transform:translateY(32px);transition:opacity 1.1s var(--ease),transform 1.1s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- specs ---------- */
.specs{background:linear-gradient(to bottom,transparent,var(--bg) 16%);pointer-events:auto;padding-top:28vh}
.specs h2,.cta h2{font-size:clamp(40px,5vw,72px);font-weight:700;letter-spacing:-.03em;line-height:1.05}
.specs-head{max-width:720px}
.lead{font-size:clamp(18px,1.5vw,21px);line-height:1.6;color:var(--muted);margin-top:20px}
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);column-gap:clamp(24px,4vw,64px);margin-top:72px}
.spec-grid div{border-top:1px solid var(--hair);padding:26px 0 44px}
.spec-grid div:nth-child(3n+2){transition-delay:.08s}.spec-grid div:nth-child(3n){transition-delay:.16s}
.spec-grid dt{font-size:13px;color:var(--muted);font-weight:500;letter-spacing:.04em}
.spec-grid dd{font-size:clamp(22px,2.1vw,30px);font-weight:600;letter-spacing:-.015em;line-height:1.25;margin-top:10px;font-variant-numeric:tabular-nums}

/* ---------- CTA ---------- */
.cta{align-items:center;text-align:center;min-height:90vh;pointer-events:auto;
background:radial-gradient(60% 50% at 50% 38%,color-mix(in srgb,var(--accent) 9%,transparent),transparent 70%),var(--bg)}
.cta h2{max-width:14em}
.price{font-size:19px;color:var(--muted);margin:18px 0 32px;font-variant-numeric:tabular-nums}
.perks{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 28px;margin-top:28px;font-size:13px;color:var(--muted)}
.perks li{display:flex;align-items:center;gap:8px}
.perks li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent)}
.product-switch{display:flex;gap:8px;margin-top:64px;flex-wrap:wrap;justify-content:center;padding:4px;border-radius:980px;background:color-mix(in srgb,var(--fg) 5%,transparent)}
.product-switch a{display:inline-flex;align-items:center;min-height:36px;font-size:13px;font-weight:500;padding:0 18px;border-radius:980px;color:var(--muted);text-transform:capitalize;transition:color .2s,background .3s}
.product-switch a:hover{color:var(--fg)}
.product-switch a.on{background:var(--fg);color:var(--bg)}

/* ---------- footer ---------- */
.foot{position:relative;background:var(--bg2);padding:40px var(--pad) 48px;font-size:12px;color:var(--muted);pointer-events:auto;line-height:1.7}
.foot-top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:22px;margin-bottom:18px;border-bottom:1px solid var(--hair);color:var(--fg)}
.foot-top .brand{font-size:15px}
.foot-links{display:flex;gap:28px;color:var(--muted)}.foot-links a:hover{color:var(--fg)}
.foot-credit{margin-top:4px;max-width:70em}
.foot-credit a{text-decoration:underline;text-underline-offset:3px}

/* ---------- hotspots ---------- */
.hotspots{position:fixed;inset:0;z-index:5;pointer-events:none}
.hs{position:absolute;left:0;top:0;width:44px;height:44px;margin:-22px 0 0 -22px;border:0;background:none;pointer-events:auto;cursor:pointer;opacity:0;transition:opacity .5s}
.hs.vis{opacity:1}
.hs::before{content:"";position:absolute;inset:12px;border-radius:50%;background:rgba(255,255,255,.96);box-shadow:0 2px 12px rgba(0,0,0,.28);transition:transform .35s var(--ease)}
.hs:hover::before{transform:scale(1.15)}
.hs::after{content:"";position:absolute;inset:6px;border-radius:50%;border:1.5px solid rgba(255,255,255,.85);animation:pulse 2.4s var(--ease) infinite}
.hs i{position:absolute;left:50%;top:50%;width:8px;height:8px;margin:-4px;z-index:1;font-style:normal}
.hs i::before,.hs i::after{content:"";position:absolute;background:#111;left:3px;top:0;width:2px;height:8px;border-radius:1px}.hs i::after{transform:rotate(90deg)}
.hs .tip{position:absolute;left:46px;top:50%;transform:translate(-4px,-50%);white-space:nowrap;font-size:13px;font-weight:600;padding:7px 13px;border-radius:980px;background:rgba(255,255,255,.94);color:#111;box-shadow:0 6px 20px rgba(0,0,0,.14);opacity:0;transition:opacity .3s,transform .4s var(--ease);pointer-events:none}
.hs:hover .tip,.hs:focus-visible .tip{opacity:1;transform:translate(0,-50%)}
@keyframes pulse{0%{transform:scale(.7);opacity:1}100%{transform:scale(1.3);opacity:0}}
body.focus .hs{opacity:0!important;pointer-events:none}

/* ---------- hotspot detail card (glass) ---------- */
.hs-card{position:fixed;z-index:30;right:var(--pad);top:50%;transform:translateY(-50%);width:360px;padding:26px 30px 32px;border-radius:28px;background:var(--glass);
backdrop-filter:blur(30px) saturate(170%);-webkit-backdrop-filter:blur(30px) saturate(170%);border:1px solid color-mix(in srgb,var(--fg) 9%,transparent);box-shadow:var(--shadow);animation:cardin .7s var(--ease)}
.hs-card[hidden]{display:none}
.hs-card h3{font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1.15;margin-top:24px}
.hs-card p{font-size:17px;line-height:1.6;color:var(--muted);margin-top:10px}
.hs-back{display:inline-flex;align-items:center;gap:4px;min-height:36px;font:inherit;font-size:14px;font-weight:500;color:var(--fg);background:color-mix(in srgb,var(--fg) 8%,transparent);border:0;border-radius:980px;padding:0 16px 0 12px;cursor:pointer;transition:background .2s}
.hs-back:hover{background:color-mix(in srgb,var(--fg) 13%,transparent)}
.hs-back span{font-size:20px;line-height:1;margin-top:-2px}
@keyframes cardin{from{opacity:0;transform:translateY(-44%)}}

/* ---------- variant dock (glass) ---------- */
.dock{position:fixed;z-index:25;left:50%;bottom:max(24px,env(safe-area-inset-bottom));transform:translateX(-50%);display:flex;align-items:center;gap:18px;padding:8px 10px 8px 22px;border-radius:980px;
background:var(--glass);backdrop-filter:blur(24px) saturate(170%);-webkit-backdrop-filter:blur(24px) saturate(170%);border:1px solid color-mix(in srgb,var(--fg) 9%,transparent);box-shadow:var(--shadow);transition:opacity .5s,transform .6s var(--ease)}
body.past .dock{opacity:0;transform:translate(-50%,20px);pointer-events:none}
.dock-label{font-size:13px;font-weight:500;min-width:68px;color:var(--fg);white-space:nowrap}
.swatches{display:flex;gap:12px}
.sw{width:30px;height:30px;border-radius:50%;border:0;cursor:pointer;position:relative;box-shadow:inset 0 0 0 1px rgba(0,0,0,.12),inset 0 -6px 10px rgba(0,0,0,.15),inset 0 4px 6px rgba(255,255,255,.18);transition:transform .35s var(--ease)}
.sw:hover{transform:scale(1.08)}
.sw::before{content:"";position:absolute;inset:-7px;border-radius:50%}/* 44px touch target */
.sw::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:1.5px solid transparent;transition:border-color .3s}
.sw.on::after{border-color:var(--fg)}

/* ---------- focus mode ---------- */
body.focus main{opacity:0}
body.focus .nav{opacity:0;pointer-events:none}

/* ---------- tablet ---------- */
@media (max-width:1024px) and (min-width:761px){
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .spec-grid div:nth-child(n){transition-delay:0s}.spec-grid div:nth-child(2n){transition-delay:.08s}
}

/* ---------- mobile (390x844 target) ---------- */
@media (max-width:760px){
  :root{--pad:20px}
  body{font-size:16px}
  .nav{height:52px;grid-template-columns:1fr auto}
  .nav-links{display:none}
  .nav-buy{font-size:13px;padding:9px 16px}
  section{padding:88px var(--pad)}

  /* hero: copy at top, product in lower half */
  .hero{justify-content:flex-start;align-items:center;text-align:center;padding-top:calc(52px + 7vh)}
  .hero-copy{max-width:none}
  .eyebrow{font-size:13px;margin-bottom:8px}
  .hero h1{font-size:clamp(44px,13.5vw,58px);line-height:1;letter-spacing:-.045em;margin-left:0}
  .tagline{font-size:18px;margin-top:12px}
  .hero-cta{justify-content:center;gap:4px 22px;margin-top:22px}
  .btn{min-height:46px;padding:0 24px;font-size:16px}
  .link{font-size:16px}
  .hero-price{margin-top:6px;font-size:13px}
  .scroll-cue{display:none}

  /* story: glass text cards pinned near the bottom, above the dock */
  .story{min-height:120vh;justify-content:flex-end;padding-bottom:calc(96px + env(safe-area-inset-bottom))}
  .story .inner{max-width:none;padding:20px 22px 22px;border-radius:24px;background:color-mix(in srgb,var(--bg) 72%,transparent);
    backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);border:1px solid color-mix(in srgb,var(--fg) 8%,transparent);box-shadow:var(--shadow)}
  .story .num{margin-bottom:12px;gap:10px}.story .num::after{width:28px}
  .story h2{font-size:30px;line-height:1.15}
  .story h2+p{font-size:16px;line-height:1.6;margin-top:10px}

  /* specs / cta */
  .specs{padding-top:24vh}
  .specs h2,.cta h2{font-size:clamp(32px,9vw,40px);line-height:1.12}
  .lead{font-size:17px;margin-top:14px}
  .spec-grid{grid-template-columns:1fr 1fr;column-gap:20px;margin-top:40px}
  .spec-grid div{padding:18px 0 26px}
  .spec-grid div:nth-child(n){transition-delay:0s}.spec-grid div:nth-child(2n){transition-delay:.08s}
  .spec-grid dd{font-size:19px}
  .cta{min-height:auto;padding-top:120px;padding-bottom:110px}
  .price{font-size:17px;margin:14px 0 26px}
  .btn-lg{min-height:52px;width:100%;max-width:320px}
  .perks{gap:6px 18px;font-size:12px}
  .product-switch{margin-top:44px}
  .product-switch a{min-height:44px;padding:0 20px;font-size:14px}

  .foot{padding:32px var(--pad) calc(36px + env(safe-area-inset-bottom))}
  .foot-top{flex-direction:column;align-items:flex-start;gap:6px}
  .foot-links a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}

  /* hotspot card becomes a bottom sheet */
  .hs-card{left:12px;right:12px;width:auto;top:auto;bottom:max(12px,env(safe-area-inset-bottom));transform:none;padding:18px 22px 26px;border-radius:28px;animation:sheetin .6s var(--ease)}
  .hs-card h3{font-size:24px;margin-top:14px}.hs-card p{font-size:15px}
  .hs-back{min-height:44px;padding:0 18px 0 14px}
  .hs .tip{display:none}

  .dock{padding:6px 8px 6px 18px;gap:14px;max-width:calc(100vw - 24px)}
  .sw{width:32px;height:32px}.sw::before{inset:-6px}
  body.focus .dock{opacity:0;pointer-events:none}
}
@keyframes sheetin{from{opacity:0;transform:translateY(24px)}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}