:root{
  --bg:#0b0f14; --panel:#111827; --card:#0f172a;
  --text:#e5e7eb; --muted:#94a3b8; --line:rgba(148,163,184,.18);
  --brand:#3b82f6; --ok:#22c55e; --warn:#f59e0b; --danger:#ef4444;
  --code:#0a0f1a;
  --radius:14px;
  --shadow:0 10px 25px rgba(0,0,0,.35);
  --max:1200px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono";
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
}
:root[data-theme="light"]{
  --bg:#ffffff; --panel:#f8fafc; --card:#ffffff;
  --text:#0f172a; --muted:#475569; --line:rgba(15,23,42,.12);
  --code:#0b1020;
  --shadow:0 10px 25px rgba(2,6,23,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--sans); background:var(--bg); color:var(--text); line-height:1.65}
a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; height:auto}

.container{max-width:var(--max); margin:0 auto; padding:18px}
.grid{
  display:grid;
  grid-template-columns: 260px 1fr 280px;
  gap:16px;
}
@media (max-width:1100px){
  .grid{grid-template-columns: 1fr}
  .sidebar,.rightbar{position:static !important}
}

.topbar{
  position:sticky; top:0; z-index:99;
  backdrop-filter:saturate(180%) blur(10px);
  background:color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom:1px solid var(--line);
}
.topbar .row{
  display:flex; align-items:center; gap:12px;
  max-width:var(--max); margin:0 auto; padding:12px 18px;
}
.brand{
  font-weight:800; letter-spacing:.2px; color:var(--text);
  display:flex; align-items:center; gap:10px;
}
.brand .dot{width:10px;height:10px;border-radius:99px;background:var(--brand); box-shadow:0 0 0 4px color-mix(in srgb, var(--brand) 22%, transparent)}
.navlinks{display:flex; gap:10px; flex-wrap:wrap}
.navlinks a{color:var(--muted); padding:6px 10px; border-radius:10px}
.navlinks a:hover{background:color-mix(in srgb, var(--panel) 55%, transparent); color:var(--text); text-decoration:none}
.spacer{flex:1}

.search{
  display:flex; align-items:center; gap:8px;
  background:color-mix(in srgb, var(--panel) 75%, transparent);
  border:1px solid var(--line);
  padding:8px 10px; border-radius:12px;
  min-width:320px;
}
.search input{
  width:100%; border:0; outline:0; background:transparent;
  color:var(--text); font-size:14px;
}
.btn{
  border:1px solid var(--line);
  background:color-mix(in srgb, var(--panel) 75%, transparent);
  color:var(--text);
  padding:8px 10px; border-radius:12px;
  cursor:pointer;
}
.btn:hover{border-color:color-mix(in srgb, var(--brand) 45%, var(--line));}
.pill{
  display:inline-flex; align-items:center; gap:6px;
  border:1px solid var(--line);
  background:color-mix(in srgb, var(--panel) 75%, transparent);
  color:var(--muted);
  padding:4px 10px; border-radius:999px; font-size:12px;
}

.card{
  background:color-mix(in srgb, var(--card) 88%, transparent);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.card .hd{padding:14px 14px 8px 14px; border-bottom:1px solid var(--line)}
.card .bd{padding:14px}
.card .ft{padding:12px 14px; border-top:1px solid var(--line); color:var(--muted); font-size:13px}
.h1{font-size:26px; margin:0 0 6px}
.h2{font-size:18px; margin:0}
.muted{color:var(--muted)}
.small{font-size:13px}
.kbd{font-family:var(--mono); font-size:12px; padding:2px 6px; border:1px solid var(--line); border-radius:8px; color:var(--muted)}

.sidebar,.rightbar{position:sticky; top:76px; align-self:start}
.tree a{display:block; padding:8px 10px; border-radius:10px; color:var(--muted)}
.tree a:hover{background:color-mix(in srgb, var(--panel) 55%, transparent); color:var(--text); text-decoration:none}
.tree .title{padding:10px 10px 6px; font-weight:700; color:var(--text)}
.tagcloud{display:flex; flex-wrap:wrap; gap:8px; padding:10px}
.tagcloud a{font-size:12px; color:var(--muted)}
.tagcloud a:hover{color:var(--text); text-decoration:none}

.listitem{padding:12px 0; border-bottom:1px solid var(--line)}
.listitem:last-child{border-bottom:0}
.listitem .t{font-weight:750; color:var(--text)}
.meta{display:flex; gap:10px; flex-wrap:wrap; color:var(--muted); font-size:12px; margin-top:6px}

.hero{
  padding:18px;
  background:linear-gradient(135deg,
    color-mix(in srgb, var(--brand) 18%, transparent),
    color-mix(in srgb, var(--ok) 12%, transparent)
  );
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.hero .lead{color:var(--muted); margin:8px 0 0}

.quick{display:grid; grid-template-columns:repeat(4, 1fr); gap:12px}
@media(max-width:1100px){.quick{grid-template-columns:repeat(2,1fr)}}
.quick a{
  display:block; padding:14px; border-radius:var(--radius);
  border:1px solid var(--line);
  background:color-mix(in srgb, var(--panel) 70%, transparent);
  color:var(--text); text-decoration:none;
}
.quick a:hover{border-color:color-mix(in srgb, var(--brand) 55%, var(--line))}
.quick .d{color:var(--muted); font-size:12px; margin-top:6px}

.doc h2,.doc h3{scroll-margin-top:90px}
.doc pre{
  background:var(--code); color:#e2e8f0;
  border:1px solid color-mix(in srgb, var(--line) 65%, transparent);
  border-radius:14px; padding:12px; overflow:auto;
  position:relative;
}
.copybtn{
  position:absolute; top:10px; right:10px;
  font-family:var(--mono); font-size:12px;
  padding:6px 8px; border-radius:10px;
  border:1px solid color-mix(in srgb, var(--line) 75%, transparent);
  background:color-mix(in srgb, var(--panel) 55%, transparent);
  color:var(--muted); cursor:pointer;
}
.copybtn:hover{color:var(--text); border-color:color-mix(in srgb, var(--brand) 55%, var(--line));}

.table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
}
.table th,.table td{
  padding:10px 12px;
  border-bottom:1px solid var(--line);
  font-size:14px;
}
.table th{background:color-mix(in srgb, var(--panel) 75%, transparent); text-align:left}
.table tr:last-child td{border-bottom:0}

.callout{
  border:1px solid var(--line);
  border-left:4px solid var(--brand);
  background:color-mix(in srgb, var(--panel) 70%, transparent);
  padding:12px 12px; border-radius:14px;
}
.callout.tip{border-left-color:var(--ok)}
.callout.warn{border-left-color:var(--warn)}
.callout.danger{border-left-color:var(--danger)}
.callout .tt{font-weight:750; margin-bottom:6px}
.breadcrumb{color:var(--muted); font-size:12px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--text); text-decoration:none}