:root{--bg:#f6f8fb;--card:#fff;--text:#1d2433;--muted:#5b6578;--accent:#1c78d2;--line:#e3e8ef}
@media (prefers-color-scheme:dark){:root{--bg:#12151b;--card:#1b2029;--text:#e8ecf3;--muted:#9aa4b5;--accent:#5aa9ff;--line:#2a3140}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:48px 20px 64px}
header{display:flex;align-items:center;gap:18px;margin-bottom:28px}
header img{width:84px;height:84px}
h1{font-size:32px;line-height:1.2;margin:0}
.tag{color:var(--muted);margin:4px 0 0}
section{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin:18px 0}
h2{font-size:20px;margin:0 0 8px}
p{margin:8px 0}
ul{padding-left:22px;margin:8px 0}
a{color:var(--accent)}
nav{margin-top:6px;font-size:15px}
nav a{margin-right:16px}
footer{color:var(--muted);font-size:14px;text-align:center;margin-top:32px}
code{font:15px ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--line);padding:1px 5px;border-radius:5px}