/* ===== Design tokens ===== */
:root{
  --bg:#fbf7fa; --surface:#ffffff; --surface-2:#f5eff4;
  --ink:#141b34; --muted:#545c78; --line:#ebe3ec;
  --link:#3554a8; --ring:#3554a8;
  --navy:#141b34; --on-navy:#ffffff;
  --grad:linear-gradient(100deg,#d4671f 0%,#b4527a 48%,#3554a8 100%);
  --grad-soft:linear-gradient(135deg,#f6a35a 0%,#c56f8f 50%,#3b5bb3 100%);
  --glow-a:rgba(246,163,90,.38); --glow-b:rgba(91,120,214,.30); --glow-c:rgba(214,120,170,.22);
  --shadow:0 1px 2px rgba(20,27,52,.04),0 8px 24px -8px rgba(20,27,52,.10);
  --shadow-lg:0 2px 4px rgba(20,27,52,.04),0 24px 48px -16px rgba(20,27,52,.18);
  --r-sm:10px; --r:16px; --r-lg:24px;
  --max:1120px; --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:light dark;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b1020; --surface:#121831; --surface-2:#171e3a;
    --ink:#eef0f8; --muted:#a7aec7; --line:#232a47;
    --link:#9bb0ff; --ring:#9bb0ff;
    --navy:#eef0f8; --on-navy:#0b1020;
    --grad:linear-gradient(100deg,#f7a35c 0%,#e58bb0 48%,#8fa8ff 100%);
    --glow-a:rgba(246,163,90,.20); --glow-b:rgba(91,120,214,.28); --glow-c:rgba(214,120,170,.14);
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px -8px rgba(0,0,0,.5);
    --shadow-lg:0 24px 48px -16px rgba(0,0,0,.6);
  }
}

/* ===== Base ===== */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang HK","Noto Sans TC","Microsoft JhengHei","Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--link);text-underline-offset:3px;text-decoration-thickness:1px}
a,button,summary{touch-action:manipulation}
:focus-visible{outline:2px solid var(--ring);outline-offset:3px;border-radius:6px}
h1,h2,h3{line-height:1.25;letter-spacing:-.015em;text-wrap:balance;word-break:keep-all;overflow-wrap:anywhere}
p{text-wrap:pretty}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.ic{width:20px;height:20px;flex:none}
.ic.sm{width:16px;height:16px}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--navy);color:var(--on-navy);
  padding:10px 16px;border-radius:var(--r-sm);text-decoration:none;font-weight:600;transition:top .2s}
.skip:focus{top:12px}

/* ===== Header ===== */
header.site{position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--bg) 78%,transparent);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent)}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);
  font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap;min-height:44px}
.brand img{width:48px;height:auto}
.brand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand i{font-style:normal;font-weight:500;color:var(--muted)}
.links{display:flex;gap:2px}
.links a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;border-radius:999px;
  color:var(--muted);text-decoration:none;font-size:15px;font-weight:500;transition:color .2s,background-color .2s}
.links a:hover{color:var(--ink);background:var(--surface-2)}
.links a[aria-current]{color:var(--ink);background:var(--surface-2)}

/* ===== Buttons ===== */
.actions{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;
  border-radius:999px;font-weight:600;font-size:15px;text-decoration:none;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s,border-color .2s}
.btn .ic{transition:transform .2s var(--ease)}
.btn:hover .ic:last-child{transform:translateX(2px)}
.btn:active{transform:scale(.98)}
.btn.primary{background:var(--navy);color:var(--on-navy);box-shadow:var(--shadow)}
.btn.primary:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}
.btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:color-mix(in srgb,var(--ink) 30%,var(--line))}
.btn.light{background:#fff;color:#141b34}
.btn.light:hover{transform:translateY(-1px)}
.btn.outline{color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn.outline:hover{background:rgba(255,255,255,.1)}
.btn.sm{min-height:44px;padding:0 16px;font-size:14px}

/* ===== Hero ===== */
.hero{position:relative;padding:56px 0 40px;overflow:hidden;isolation:isolate}
.glow{position:absolute;inset:-20% -10% auto;height:120%;z-index:-1;pointer-events:none;
  background:
    radial-gradient(40% 45% at 20% 30%,var(--glow-a),transparent 70%),
    radial-gradient(45% 50% at 80% 35%,var(--glow-b),transparent 70%),
    radial-gradient(35% 40% at 55% 80%,var(--glow-c),transparent 70%);
  filter:blur(20px);
  -webkit-mask-image:linear-gradient(#000 55%,transparent 85%);mask-image:linear-gradient(#000 55%,transparent 85%)}
.glow::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:48px 48px;opacity:.35;
  -webkit-mask-image:radial-gradient(60% 55% at 50% 40%,#000,transparent 75%);
  mask-image:radial-gradient(60% 55% at 50% 40%,#000,transparent 75%)}
.hero-grid{display:grid;gap:40px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 20px;padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--muted);
  background:color-mix(in srgb,var(--surface) 70%,transparent);border:1px solid var(--line)}
.hero h1{font-size:clamp(32px,5.4vw,56px);font-weight:800;line-height:1.12;letter-spacing:-.03em;margin:0 0 20px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(16px,2vw,18px);color:var(--muted);max-width:34em;margin:0 0 28px}
.hero-copy{position:relative;z-index:1}
.hero-art{pointer-events:none;width:85%;margin:8px auto -24px}
.hero-art img{width:100%;
  -webkit-mask-image:linear-gradient(to right,transparent 0,#000 7%,#000 93%,transparent 100%);
  mask-image:linear-gradient(to right,transparent 0,#000 7%,#000 93%,transparent 100%)}
@media (min-width:900px){
  .hero{padding:104px 0 180px}
  .hero-copy{max-width:600px}
  .hero-art{position:absolute;z-index:0;margin:0;bottom:10%;
    right:max(0px,calc(50% - 600px));width:min(51vw,731px)}
}

/* ===== Sections ===== */
.section{padding:56px 20px}
@media (min-width:900px){.section{padding:88px 20px}}
.sec-head{max-width:640px;margin:0 0 36px}
.kicker{margin:0 0 10px;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--link)}
.sec-head h2,.doc-head h1{font-size:clamp(28px,4vw,40px);font-weight:800;margin:0 0 12px}
.sub{color:var(--muted);margin:0;font-size:17px}

/* Bento */
.bento{display:grid;gap:16px}
@media (min-width:760px){.bento{grid-template-columns:repeat(2,1fr)}.tile.big{grid-column:1/-1}}
@media (min-width:1024px){.bento{grid-template-columns:1.3fr 1fr 1fr}.tile.big{grid-column:auto;grid-row:span 2}}
.tile{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow);overflow:hidden}
.tile.big{background:
  radial-gradient(80% 60% at 100% 100%,var(--glow-b),transparent 70%),
  radial-gradient(60% 50% at 0% 100%,var(--glow-a),transparent 70%),var(--surface)}
.tile.big h3{font-size:26px}
.tile h3{font-size:20px;margin:16px 0 8px}
.tile p{margin:0;color:var(--muted)}
.badge-ic{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:12px;flex:none;
  color:var(--link);background:color-mix(in srgb,var(--link) 12%,transparent)}

/* Apps */
.apps{display:grid;gap:16px}
@media (min-width:760px){.apps{grid-template-columns:repeat(2,1fr)}}
.app{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;
  box-shadow:var(--shadow);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.app:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.app-top{display:flex;align-items:center;gap:16px}
.app-top h3{margin:0;font-size:20px}
.plat{margin:0;font-size:14px;color:var(--muted)}
.pill{margin-left:auto;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;white-space:nowrap;
  color:var(--muted);background:var(--surface-2);border:1px solid var(--line)}
.app-icon{width:64px;height:64px;border-radius:15px;flex:none;display:grid;place-items:center;
  background:var(--grad-soft);color:#fff;font-weight:800;font-size:28px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.2),0 6px 16px -6px rgba(59,91,179,.5)}
.app-icon.geno{background:linear-gradient(135deg,#4a6cc7,#1d2747)}
.app-icon.xs{width:32px;height:32px;border-radius:8px;font-size:15px;display:inline-grid;vertical-align:middle;box-shadow:none}
.desc{color:var(--muted);margin:18px 0 18px}
.app-links{display:flex;flex-wrap:wrap;gap:8px;border-top:1px solid var(--line);padding-top:16px}
.app-links a{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 14px;border-radius:999px;
  color:var(--ink);text-decoration:none;font-size:14px;font-weight:500;background:var(--surface-2);transition:background-color .2s}
.app-links a:hover{background:color-mix(in srgb,var(--link) 12%,var(--surface-2))}

/* CTA band */
.cta{display:grid;gap:24px;align-items:center;padding:40px 28px;border-radius:28px;color:#fff;
  background:radial-gradient(60% 120% at 0% 0%,rgba(246,163,90,.55),transparent 60%),
             radial-gradient(60% 120% at 100% 100%,rgba(91,120,214,.7),transparent 60%),#141b34;
  box-shadow:var(--shadow-lg)}
.cta h2{font-size:clamp(26px,3.6vw,36px);font-weight:800;margin:0 0 8px}
.cta p{margin:0;color:rgba(255,255,255,.82)}
@media (min-width:900px){.cta{grid-template-columns:1fr auto;padding:56px}}

/* ===== Doc pages ===== */
.doc-page{padding-top:48px;padding-bottom:24px}
.doc-head{max-width:720px;margin:0 0 32px}
.doc{max-width:720px}
.doc h2{font-size:21px;margin:40px 0 10px}
.doc h3{font-size:17px;margin:28px 0 6px}
.doc ul{padding-left:22px}
.doc li{margin:4px 0}
.doc hr{border:0;border-top:1px solid var(--line);margin:56px 0}
.doc section{scroll-margin-top:84px}
.summary{display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border-radius:var(--r);
  background:color-mix(in srgb,var(--link) 8%,var(--surface));border:1px solid color-mix(in srgb,var(--link) 25%,var(--line))}
.summary .ic{color:var(--link);margin-top:3px}
.doc-layout{display:grid;gap:32px}
.toc{font-size:14px}
.toc p{margin:0 0 8px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:12px}
.toc ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.toc a{display:inline-flex;align-items:center;min-height:36px;padding:0 12px;border-radius:999px;
  color:var(--muted);text-decoration:none;background:var(--surface);border:1px solid var(--line)}
.toc a:hover{color:var(--ink)}
@media (min-width:960px){
  .doc-layout{grid-template-columns:220px 1fr;gap:56px}
  .toc{position:sticky;top:96px;align-self:start}
  .toc ol{display:block;border-left:1px solid var(--line)}
  .toc a{display:flex;min-height:36px;border:0;background:none;border-radius:0;padding:0 14px;margin-left:-1px;border-left:2px solid transparent}
  .toc a:hover{border-left-color:var(--link)}
}
.contact-grid{display:grid;gap:12px;margin:0 0 16px}
@media (min-width:760px){.contact-grid{grid-template-columns:repeat(3,1fr)}}
.contact{display:flex;gap:14px;align-items:center;padding:18px;border-radius:var(--r);text-decoration:none;color:var(--ink);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:border-color .2s,transform .2s var(--ease)}
a.contact:hover{border-color:var(--link);transform:translateY(-1px)}
.contact strong{display:block}
.contact span span{color:var(--muted);font-size:14px;overflow-wrap:anywhere}
.app-support{display:grid;gap:12px;margin-top:32px}
@media (min-width:640px){.app-support{grid-template-columns:1fr 1fr}}
.mini{padding:20px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line)}
.mini h2{display:flex;align-items:center;gap:10px;margin:0 0 6px;font-size:19px}
.mini p{margin:0 0 14px;color:var(--muted)}
details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);margin:10px 0;overflow:hidden}
summary{cursor:pointer;font-weight:600;padding:14px 18px;min-height:44px;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:22px;font-weight:400;color:var(--muted);transition:transform .2s var(--ease)}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:0;padding:0 18px 16px;color:var(--muted)}
.nf{text-align:center;padding:96px 20px}
.nf .sub{margin-bottom:28px}

/* ===== Footer ===== */
footer.site{margin-top:40px;border-top:1px solid var(--line);background:color-mix(in srgb,var(--surface-2) 50%,var(--bg))}
.foot{display:grid;gap:32px;padding-top:48px;padding-bottom:32px;grid-template-columns:1fr 1fr}
.foot-brand{grid-column:1/-1}
.foot-brand p{color:var(--muted);margin:8px 0 0;max-width:28em;font-size:15px}
.foot h2{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.foot nav a{display:flex;align-items:center;min-height:36px;color:var(--ink);text-decoration:none;font-size:15px;overflow-wrap:anywhere}
.foot nav a:hover{color:var(--link)}
@media (min-width:760px){.foot{grid-template-columns:2fr 1fr 1fr 1.4fr}.foot-brand{grid-column:auto}}
.legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding-top:20px;padding-bottom:32px;
  border-top:1px solid var(--line);color:var(--muted);font-size:13px}

/* ===== Motion ===== */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.bento .reveal:nth-child(2),.apps .reveal:nth-child(2){transition-delay:.06s}
.bento .reveal:nth-child(3){transition-delay:.12s}
.bento .reveal:nth-child(4){transition-delay:.18s}
.bento .reveal:nth-child(5){transition-delay:.24s}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
  .js .reveal{opacity:1;transform:none}
}
@media (max-width:480px){
  .bar{gap:4px}
  .brand{font-size:15px;gap:8px}
  .brand img{width:42px}
  .brand i{display:none}
  .links a{padding:0 9px;font-size:14px}
}
@media (prefers-color-scheme: dark){
  .hero-art img{
    -webkit-mask-image:linear-gradient(to right,transparent 0,#000 7%,#000 93%,transparent 100%),linear-gradient(to bottom,#000 55%,transparent 92%);
    -webkit-mask-composite:source-in;
    mask-image:linear-gradient(to right,transparent 0,#000 7%,#000 93%,transparent 100%),linear-gradient(to bottom,#000 55%,transparent 92%);
    mask-composite:intersect}
}

/* ===== Featured app ===== */
.feature{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:28px;
  padding:28px;box-shadow:var(--shadow-lg);overflow:hidden;margin-bottom:16px}
.feature::before{content:"";position:absolute;inset:0 0 auto;height:220px;pointer-events:none;
  background:radial-gradient(50% 100% at 15% 0%,var(--glow-a),transparent 70%),radial-gradient(50% 100% at 85% 0%,var(--glow-b),transparent 70%);opacity:.7}
.feature>*{position:relative}
.feature-head{display:flex;align-items:center;gap:16px}
.feature-head h3{margin:0;font-size:28px}
.feature-lead{font-size:clamp(20px,2.6vw,26px);font-weight:700;line-height:1.4;margin:24px 0 8px;letter-spacing:-.01em}
.feature-lead strong{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.feature .desc{max-width:44em;margin:0 0 24px}
.pill.accent{color:#fff;background:var(--grad-soft);border-color:transparent}
.feat-grid{list-style:none;margin:0 0 24px;padding:0;display:grid;gap:12px}
@media (min-width:640px){.feat-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.feat-grid{grid-template-columns:repeat(3,1fr)}}
.feat-grid li{display:flex;gap:12px;align-items:flex-start;padding:16px;border-radius:var(--r);
  background:var(--surface-2);border:1px solid var(--line)}
.feat-grid li>.ic{color:var(--link);margin-top:3px}
.feat-grid strong{display:block;font-size:15px}
.feat-grid span{display:block;color:var(--muted);font-size:14px;line-height:1.55}
.feature-cols{display:grid;gap:12px;margin-bottom:20px}
@media (min-width:900px){.feature-cols{grid-template-columns:1.1fr 1.2fr 1fr}}
.spec{padding:20px;border-radius:var(--r);border:1px solid var(--line);background:var(--bg)}
.spec h4{display:flex;align-items:center;gap:8px;margin:0 0 8px;font-size:16px}
.spec h4 .ic{color:var(--link)}
.spec p{margin:0 0 10px;color:var(--muted);font-size:15px}
.spec p:last-child{margin-bottom:0}
.spec strong{color:var(--ink)}
.compat{list-style:none;margin:0;padding:0}
.compat li{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-top:1px solid var(--line);font-size:15px;font-weight:500}
.compat li span{color:var(--muted);font-weight:400;white-space:nowrap}
.note{font-size:14px!important;padding:10px 12px;border-radius:var(--r-sm);
  background:color-mix(in srgb,var(--link) 8%,transparent);color:var(--ink)!important}
#geno{max-width:none}
@media (min-width:760px){#geno{display:grid;grid-template-columns:1.2fr 1.4fr auto;gap:24px;align-items:center}
  #geno .desc{margin:0}#geno .app-links{border:0;padding:0}}
@media (max-width:480px){.feature{padding:20px}.feat-grid li{padding:12px 14px}.spec{padding:16px}}