:root { --ink:#141a24; --muted:#66707d; --accent:#1f6fff; --bg:#ffffff; --soft:#f4f6fa; }
  * { box-sizing: border-box; margin: 0; }
  body { font-family:-apple-system,"Segoe UI",Roboto,"PingFang SC",sans-serif; color:var(--ink);
         background:var(--bg); line-height:1.7; }
  .wrap { max-width: 860px; margin: 0 auto; padding: 0 28px; }
  .kbd { display:inline-block; border:1px solid #ccd3dd; border-bottom-width:2.5px; border-radius:7px;
         padding: 1px 9px; font-size:.9em; background:#fafbfc; }
  .btn { display:inline-block; background:var(--accent); color:#fff; padding:12px 28px; border-radius:11px;
         text-decoration:none; font-size:16px; font-weight:600; margin: 26px 9px 0;
         box-shadow: 0 6px 18px rgba(31,111,255,.28); }
  .btn:hover { filter: brightness(1.06); }
  .note { color:var(--muted); font-size:13.5px; margin-top:12px; }
  .ctl{cursor:pointer;background:none;border:none;font-size:16px;text-decoration:none;color:var(--muted);padding:2px 4px}
  .ctl:hover{color:var(--ink)}
  html[data-theme="dark"] body{--bg:#0d1117;--ink:#e6edf3;--muted:#94a3b2;--soft:#161b22}
  html[data-theme="dark"] .kbd{background:#1c2330;border-color:#3a4656;color:#e6edf3}
  html[data-theme="dark"] .plan{border-color:#2a3442}
  html[data-theme="dark"] footer{border-color:#222a35}
.sitehdr{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.sitenav{display:flex;gap:16px;align-items:center;font-size:15px}
.sitenav a{color:var(--muted);text-decoration:none}.sitenav a:hover{color:var(--ink)}
.crumbs{font-size:13px;color:var(--muted);padding:6px 0 18px}
.crumbs a{color:var(--muted);text-decoration:none}
.doclayout{display:grid;grid-template-columns:210px 1fr;gap:34px;padding:8px 0 40px}
@media(max-width:720px){.doclayout{grid-template-columns:1fr}.docnav{position:static}}
.docnav{position:sticky;top:20px;align-self:start;font-size:14.5px}
.docnav a{display:block;color:var(--muted);text-decoration:none;padding:4px 0}
.docnav a.cur{color:var(--accent);font-weight:600}
.article{max-width:680px}.article h1{font-size:32px;margin:6px 0 14px}
.article h2{font-size:22px;margin:30px 0 10px}.article h3{font-size:17px;margin:20px 0 8px}
.article p,.article li{color:#2b333d}.article ul,.article ol{padding-left:22px}
.article code{background:var(--soft);padding:1px 6px;border-radius:5px;font-size:.92em}
.article pre{background:var(--soft);padding:14px 16px;border-radius:10px;overflow:auto}
.answer{background:var(--soft);border-left:3px solid var(--accent);padding:14px 18px;border-radius:0 10px 10px 0;margin:14px 0}
.bloglist{padding:8px 0 40px}.bloglist .item{padding:18px 0;border-bottom:1px solid #edf0f4}
.bloglist .item h2{font-size:20px;margin-bottom:4px}.bloglist .item a{text-decoration:none;color:var(--ink)}
.cta{background:var(--accent);color:#fff;padding:12px 26px;border-radius:11px;text-decoration:none;font-weight:600;display:inline-block;margin-top:8px}
html[data-theme="dark"] .article p,html[data-theme="dark"] .article li{color:#c6d0da}
html[data-theme="dark"] .bloglist .item{border-color:#222a35}