:root{color-scheme:light;--ink:#202938;--muted:#5a6474;--line:#dbe2ea;--paper:#fff;--back:#f4f6f9;--accent:#3656a7}
    *{box-sizing:border-box}body{margin:0;background:var(--back);color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}
    main{max-width:900px;margin:40px auto;padding:36px 42px;background:var(--paper);border:1px solid var(--line);border-radius:16px}
    h1,h2,h3{line-height:1.35}h1{font-size:30px;margin:12px 0}h2{margin:32px 0 12px;font-size:23px;scroll-margin-top:24px}h3{font-size:18px;margin:20px 0 6px}
    p{margin:10px 0}a{color:var(--accent);text-underline-offset:3px}nav{display:flex;gap:18px;flex-wrap:wrap;margin:20px 0;padding-bottom:20px;border-bottom:1px solid var(--line)}
    .label{display:inline-block;color:#714c00;background:#fff4d6;border-radius:20px;padding:4px 12px;font-size:13px}.lead{font-size:18px;color:var(--muted)}
    .notice{padding:16px 18px;border-left:4px solid var(--accent);background:#f1f5ff;border-radius:6px}.muted,footer{color:var(--muted);font-size:14px}
    code{overflow-wrap:anywhere;padding:2px 5px;background:#eef1f6;border-radius:4px;font-size:.9em}li{margin:7px 0}footer{margin-top:32px;padding-top:18px;border-top:1px solid var(--line)}
    @media(max-width:640px){main{margin:0;padding:26px 22px;border:0;border-radius:0}h1{font-size:26px}nav{gap:12px}}