:root{--bg:#ffffff;--fg:#24292f;--muted:#57606a;--border:#d0d7de;--side:#f6f8fa}
@media (prefers-color-scheme:dark){:root{--bg:#0d1117;--fg:#e6edf3;--muted:#8d96a0;--border:#30363d;--side:#161b22}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI","Noto Sans",Helvetica,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:12px;height:52px;padding:0 16px;background:var(--bg);border-bottom:1px solid var(--border)}
.site-title{font-weight:700;font-size:17px;color:var(--fg)}
.site-desc{color:var(--muted);font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-toggle{display:none;border:1px solid var(--border);background:var(--side);color:var(--fg);border-radius:6px;width:36px;height:32px;font-size:16px;cursor:pointer}
.layout{display:flex;max-width:1280px;margin:0 auto}
.sidebar{flex:0 0 280px;position:sticky;top:52px;height:calc(100vh - 52px);overflow-y:auto;padding:18px 12px 40px;border-right:1px solid var(--border);background:var(--side);font-size:14px}
.tree,.tree ul{list-style:none;margin:0;padding:0}
.tree ul{padding-left:14px;border-left:1px solid var(--border);margin:4px 0 8px 6px}
.tree a{display:block;padding:4px 8px;border-radius:6px;color:var(--fg)}
.tree a.current{background:color-mix(in srgb,var(--accent) 14%,transparent);font-weight:600}
.tree summary{cursor:pointer;list-style:none}
.tree summary::-webkit-details-marker{display:none}
.tree summary a{display:inline-block}
.tree summary:before{content:"▸";display:inline-block;width:12px;color:var(--muted);transition:transform .15s}
.tree details[open]>summary:before{transform:rotate(90deg)}
.content{flex:1;min-width:0;padding:22px 32px 40px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:0 0 12px;font-size:13px;color:var(--muted)}
.breadcrumb li+li:before{content:"/";margin-right:6px;color:var(--border)}
.doc{max-width:780px}
.doc h1{font-size:32px;line-height:1.25;margin:0 0 8px;font-weight:700}
.doc-meta,.intro{color:var(--muted);font-size:14px;margin:0 0 18px}
.intro{font-size:18px;color:var(--fg)}
.toc{border:1px solid var(--border);border-radius:6px;padding:10px 14px;margin:0 0 20px;font-size:14px;background:var(--side)}
.toc ul{margin:6px 0 0;padding-left:18px}
.doc-body h2{font-size:24px;padding-bottom:6px;border-bottom:1px solid var(--border);margin:32px 0 12px}
.doc-body h3{font-size:19px;margin:24px 0 8px}
.doc-body code{background:var(--side);padding:2px 5px;border-radius:4px;font-size:90%}
.doc-body table{border-collapse:collapse;display:block;overflow-x:auto;margin:16px 0}
.doc-body th,.doc-body td{border:1px solid var(--border);padding:6px 12px}
.doc-body blockquote{margin:16px 0;padding:0 14px;color:var(--muted);border-left:4px solid var(--border)}
.section-index dl{margin:0}
.section-index dt{font-weight:600;margin-top:12px}
.section-index dd{margin:2px 0 0;color:var(--muted);font-size:15px}
.faq details{border:1px solid var(--border);border-radius:6px;padding:8px 12px;margin:8px 0}
.faq summary{cursor:pointer;font-weight:600}
.callout{border-left:4px solid var(--accent);background:var(--side);padding:12px 16px;border-radius:0 6px 6px 0;margin:24px 0}
.callout-title{font-weight:700;margin:0 0 4px}
.callout p{margin:0 0 6px}.callout ul{margin:0;padding-left:18px}
.pager{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin:32px 0 0;padding-top:16px;border-top:1px solid var(--border)}
.pager a{border:1px solid var(--border);border-radius:6px;padding:10px 14px;flex:1 1 240px}
.doc-footer{max-width:780px;margin-top:40px;padding-top:14px;border-top:1px solid var(--border);color:var(--muted);font-size:13px}
.doc-footer a{color:var(--muted)}
@media (max-width:860px){
.nav-toggle{display:block}
.site-desc{display:none}
.sidebar{position:fixed;left:0;top:52px;bottom:0;width:86vw;max-width:320px;height:auto;transform:translateX(-100%);transition:transform .2s;z-index:9}
.sidebar.open{transform:none;box-shadow:0 0 0 100vmax rgba(0,0,0,.35)}
.content{padding:18px 16px 32px}
.doc h1{font-size:26px}
}