:root{--navy:#0B1F3A;--navy2:#16406E;--teal:#19C3A6;--ink:#1d2433;--muted:#5b6575;--bg:#F5F7FA;--card:#fff;--line:#e3e8ef}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--ink:#e8edf5;--muted:#9aa6b8;--bg:#0a1424;--card:#111e33;--line:#1f2e48}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC","Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.75}
a{color:var(--teal)}
header.top{background:var(--navy);color:#fff}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
.bar{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:18px}
.brand i{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--teal);font-style:normal}
.lang{display:flex;gap:4px}
.lang button{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:4px 12px;font:inherit;font-size:13px;cursor:pointer}
.lang button[aria-pressed="true"]{background:#fff;color:var(--navy)}
.hero{background:linear-gradient(160deg,var(--navy),var(--navy2));color:#fff;padding:56px 0 72px}
.hero h1{font-size:clamp(30px,6vw,46px);line-height:1.2;margin:0 0 14px}
.hero p{font-size:18px;opacity:.85;margin:0 0 28px;max-width:560px}
.stores{display:flex;gap:12px;flex-wrap:wrap}
.stores a{display:inline-block;background:#fff;color:var(--navy);text-decoration:none;font-weight:700;border-radius:12px;padding:12px 20px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:-36px 0 40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.card h3{margin:6px 0 6px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card .ic{font-size:26px}
main.doc{padding:32px 0 56px}
main.doc h1{font-size:28px;line-height:1.3}
main.doc h2{font-size:19px;margin-top:32px}
.muted{color:var(--muted)}
footer{border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:14px}
footer a{color:var(--muted);margin-right:14px}
[data-lang]{display:none}
html[lang^="zh"] [data-lang="zh"],html[lang="en"] [data-lang="en"]{display:revert}