:root{
  --bg:#F5F8F8;--card:#FFFFFF;--ink:#15232A;--muted:#5B6B72;--line:#DCE6E8;
  --cyan:#0E8FA3;--cyan-ink:#FFFFFF;--tint:#E3F4F6;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0F181C;--card:#162329;--ink:#E7F0F2;--muted:#93A6AD;--line:#26363D;
  --cyan:#3FC1D3;--cyan-ink:#06262C;--tint:#13303A;
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.75 system-ui,-apple-system,"PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:var(--cyan)}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}

.top{position:sticky;top:0;z-index:5;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.02em;color:var(--ink);text-decoration:none}
.mark{width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,var(--cyan),#6FD6C6)}
.top nav a{margin-left:20px;color:var(--muted);text-decoration:none;font-size:15px}
.top nav a:hover{color:var(--ink)}

.hero{padding:72px 0 56px;background:radial-gradient(ellipse 80% 70% at 85% 0%,var(--tint),transparent 70%)}
.eyebrow{margin:0 0 14px;color:var(--cyan);font-weight:600;font-size:14px;letter-spacing:.04em}
h1{margin:0;font-size:clamp(30px,6vw,48px);line-height:1.25;letter-spacing:.01em}
.lead{max-width:600px;margin:18px 0 0;color:var(--muted);font-size:17px}
.lead.en{margin-top:8px;font-size:15px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-block;padding:11px 20px;border-radius:999px;background:var(--cyan);color:var(--cyan-ink);
  text-decoration:none;font-weight:600;font-size:15px}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}

section.wrap{padding-top:48px}
h2{margin:0 0 18px;font-size:22px}
h2 span{margin-left:8px;color:var(--muted);font-weight:400;font-size:15px}
.grid{display:grid;gap:14px}
.grid.three{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px 22px}
.card b{display:block;font-size:17px}
.card p{margin:6px 0 0;color:var(--muted);font-size:15px}
.en{color:var(--muted);font-size:14px}
.card p.en{margin-top:10px;font-size:13px;letter-spacing:.02em}
.app nav{margin-top:12px;display:flex;gap:16px;font-size:14px}
.app nav a{text-decoration:none}
.app nav a:hover{text-decoration:underline}

dl{margin:0;display:grid;grid-template-columns:6.5em 1fr;gap:10px 16px}
dt{color:var(--muted)}
dd{margin:0;overflow-wrap:anywhere}
.contact .btn{margin-top:16px}

.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:64px;padding-top:20px;padding-bottom:40px;
  border-top:1px solid var(--line);color:var(--muted);font-size:14px}

.doc{max-width:760px;padding-top:48px}
.doc h1{font-size:30px}
.doc h2{margin-top:32px;font-size:19px}
.doc p,.doc li{color:var(--ink)}
.doc .muted{color:var(--muted)}

@media (max-width:560px){
  .top nav a{margin-left:14px}
  .hero{padding:48px 0 40px}
  dl{grid-template-columns:1fr;gap:2px}
  dd{margin-bottom:10px}
}