:root{--fg:#1f2328;--muted:#59636e;--line:#d1d9e0;--bg:#fff;--side:#f6f8fa;--link:#0969da}
*{box-sizing:border-box}body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--fg);background:var(--bg)}
header{border-bottom:1px solid var(--line);padding:14px 24px;display:flex;justify-content:space-between;align-items:center}
header a{color:var(--fg);text-decoration:none;font-weight:600}nav a{margin-left:18px;font-weight:400;color:var(--muted)}
.wrap{display:flex;max-width:1100px;margin:0 auto}aside{width:240px;padding:24px;background:var(--side);min-height:calc(100vh - 60px)}
aside h4{margin:18px 0 6px;font-size:13px;color:var(--muted);text-transform:uppercase}aside a{display:block;color:var(--fg);text-decoration:none;padding:3px 0;font-size:14px}
main{flex:1;padding:32px 48px;max-width:820px}h1{font-size:30px;margin-top:0}a{color:var(--link)}
pre{background:#f6f8fa;border:1px solid var(--line);border-radius:6px;padding:14px;overflow:auto;font-size:14px}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
footer{color:var(--muted);font-size:13px;border-top:1px solid var(--line);margin-top:48px;padding-top:16px}
@media(max-width:760px){aside{display:none}main{padding:24px}}