:root{--bg:#fff;--fg:#1b2a33;--muted:#5b6b75;--accent:#136b6b;--line:#e3e8eb}
@media (prefers-color-scheme:dark){:root{--bg:#10181d;--fg:#e8eef1;--muted:#a3b2bb;--accent:#5fc4c4;--line:#27343b}}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.8 -apple-system,"PingFang TC","Noto Sans TC",system-ui,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 20px 64px}
h1{font-size:28px;margin:0 0 4px}h2{font-size:19px;margin:32px 0 6px}
p,li{margin:6px 0}ul{padding-left:22px}
.muted{color:var(--muted);font-size:14px}
.note{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:20px 0}
a{color:var(--accent)}nav{font-size:14px;margin-bottom:24px}