:root{
  --bg:#ffffff;
  --fg:#1f2937;
  --muted:#6b7280;
  --border:#e5e7eb;
  --brand:#111827;
  --accent:#2563eb;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;line-height:1.75;color:var(--fg);background:var(--bg)}
.site-header{border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff;z-index:10}
.site-header .inner{max-width:1600px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:32px}
.brand{font-weight:700;color:var(--brand);text-decoration:none}
.top-nav a{margin-right:16px;color:var(--fg);text-decoration:none}
.top-nav a:hover{color:#111827}
.container{max-width:1600px;margin:0 auto;padding:28px 20px;display:grid;grid-template-columns:280px minmax(0,1fr);gap:28px}
.sidebar{border-right:1px solid var(--border)}
.sidebar-inner{position:sticky;top:64px}
.sidebar-title{font-weight:700;margin:16px 0 8px 0}
.sidebar-subtitle{margin:10px 0 4px 0;color:#6b7280;font-size:13px}
.nav-tree details{margin:6px 0}
.nav-tree summary{display:flex;align-items:center;gap:8px;list-style:none;cursor:pointer;padding:6px 8px;border-radius:8px;color:#111827}
.nav-tree summary::-webkit-details-marker{display:none}
.nav-tree .caret{border:solid #6b7280;border-width:0 2px 2px 0;display:inline-block;padding:3px;transform:rotate(-45deg);transition:transform .15s ease}
.nav-tree details[open] > summary .caret{transform:rotate(45deg)}
.nav-tree .icon.folder:before{content:"\1F4C1"}
.nav-tree .icon.doc:before{content:"\1F4C4"}
.nav-tree .label{font-weight:600}
.nav-tree .nav-list{list-style:none;margin:4px 0 8px 24px;padding:0}
.nav-tree .nav-page{display:flex;align-items:center;gap:8px;margin:6px 0}
.nav-tree .nav-page a{text-decoration:none;color:#374151}
.nav-tree .nav-page a:hover{color:#111827}
.nav-list{list-style:none;padding:0;margin:0}
.nav-list li{margin:6px 0}
.nav-list a{color:#374151;text-decoration:none}
.nav-list a:hover{color:#111827}
.content{min-width:0}
.content h1{margin-top:0;font-size:28px}
.content h2{margin-top:28px;font-size:20px;border-bottom:1px solid var(--border);padding-bottom:6px}
.content h3{margin-top:16px;font-size:16px}
.md{color:var(--fg);font-size:16px;line-height:1.9}
.md h1,.md h2,.md h3,.md h4,.md h5,.md h6{scroll-margin-top:84px}
.md h1{font-size:28px;margin:0 0 12px 0}
.md h1 + p{margin-top:4px;color:var(--muted)}
.md h2{font-size:22px;margin:32px 0 12px 0;border-bottom:1px solid var(--border);padding-bottom:6px;position:relative;padding-left:12px}
.md h2:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);border-radius:2px}
.md h3{font-size:18px;margin:20px 0 8px 0;position:relative;padding-left:10px}
.md h3:before{content:"";position:absolute;left:0;top:0.2em;bottom:0.2em;width:3px;background:var(--accent);opacity:.7;border-radius:2px}
.md h4{font-size:16px;margin:18px 0 6px 0;color:#111827}
.md p{margin:12px 0;color:#111827}
.md ul,.md ol{padding-left:24px;margin:10px 0}
.md ul li::marker{color:#9ca3af}
.md li{margin:6px 0}
.md blockquote{margin:16px 0;padding:10px 14px;border-left:4px solid #e5e7eb;background:#fafafa;color:#374151}
.md code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;background:#f3f4f6;border:1px solid #e5e7eb;border-radius:6px;padding:2px 6px}
.md pre{background:#0b1020;color:#e5e7eb;border-radius:10px;padding:14px 16px;overflow:auto;border:1px solid #0f172a}
.md pre code{background:transparent;border:none;padding:0;color:inherit}
.md a{color:#2563eb;text-decoration:none}
.md a:hover{text-decoration:underline}
.md table{width:100%;border-collapse:separate;border-spacing:0;margin:14px 0;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.md th,.md td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}
.md thead th{background:#f9fafb;font-weight:700}
.md tbody tr:hover{background:#fbfbfc}
.md hr{border:0;border-top:1px solid var(--border);margin:28px 0}
.md img{max-width:100%;height:auto;border:1px solid #e5e7eb;border-radius:8px}
.md .note{border-left:4px solid #2563eb;background:#eef2ff;padding:10px 12px;border-radius:6px}
.md .warn{border-left:4px solid #f59e0b;background:#fffbeb;padding:10px 12px;border-radius:6px}
.md .danger{border-left:4px solid #ef4444;background:#fef2f2;padding:10px 12px;border-radius:6px}
.toc{border-left:1px solid var(--border)}
.toc-inner{position:sticky;top:64px;padding-left:16px}
.toc-title{font-weight:700;margin:0 0 8px 0}
.toc-list{list-style:none;padding:0;margin:0}
.toc-list li{margin:6px 0}
.toc-sub{margin-left:12px}
.toc a{text-decoration:none;color:#6b7280}
.toc a:hover{color:#111827}
.footer{border-top:1px solid var(--border);margin-top:32px}
.footer .inner{max-width:1600px;margin:0 auto;padding:16px;color:var(--muted);font-size:14px}

@media (max-width: 1100px){
  .container{grid-template-columns: 1fr;gap:20px}
  .sidebar{display:none}
  .toc{display:none}
}