:root{
  --bg:#0b0d12; --panel:#12151d; --panel2:#171b26; --line:#1e2330; --fg:#dfe3ec;
  --muted:#8b93a7; --accent:#5b8cff; --code-bg:#0f1219; --hit:#ffd479;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
  font:15px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

.topbar{display:flex;align-items:center;gap:24px;padding:12px 24px;
  border-bottom:1px solid var(--line);background:var(--panel);position:sticky;top:0;z-index:20}
.brand{font-weight:600;font-size:16px;color:var(--fg);white-space:nowrap}
.brand span{color:var(--muted);font-weight:400;margin-left:6px}
.ext{margin-left:auto;white-space:nowrap}
.ext a{margin-left:18px;color:var(--muted);font-size:14px}

.search{position:relative;flex:1;max-width:460px}
.search input{width:100%;padding:8px 34px 8px 12px;border-radius:8px;
  border:1px solid var(--line);background:var(--bg);color:var(--fg);font-size:14px;font-family:inherit}
.search input:focus{outline:none;border-color:var(--accent)}
.search kbd{position:absolute;right:9px;top:50%;transform:translateY(-50%);
  font:11px/1 ui-monospace,monospace;color:var(--muted);border:1px solid var(--line);
  border-radius:4px;padding:3px 6px;pointer-events:none}
.search input:focus + kbd{display:none}

.results{position:absolute;top:calc(100% + 6px);left:0;right:0;max-height:70vh;overflow-y:auto;
  background:var(--panel2);border:1px solid var(--line);border-radius:10px;
  box-shadow:0 16px 40px rgba(0,0,0,.5);padding:6px}
.results .empty{padding:14px;color:var(--muted);font-size:14px}
.results a{display:block;padding:9px 12px;border-radius:7px;color:var(--fg)}
.results a:hover,.results a.sel{background:rgba(91,140,255,.13);text-decoration:none}
.results .r-h{font-size:14px;font-weight:500}
.results .r-p{font-size:12px;color:var(--muted);margin-top:1px}
.results .r-x{font-size:12px;color:var(--muted);margin-top:3px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.results mark{background:rgba(255,212,121,.22);color:var(--hit);border-radius:2px;padding:0 1px}

.shell{display:grid;grid-template-columns:236px minmax(0,1fr);max-width:1200px;margin:0 auto}
.sidebar{padding:26px 18px;border-right:1px solid var(--line);position:sticky;top:55px;
  height:calc(100vh - 55px);overflow-y:auto}
.nav-group{margin-bottom:20px}
.nav-group h3{margin:0 0 7px;font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--muted);font-weight:600}
.nav-group ul{list-style:none;margin:0;padding:0}
.nav-group a{display:block;padding:6px 10px;border-radius:6px;color:var(--fg);font-size:14px}
.nav-group a:hover{background:var(--panel);text-decoration:none}
.nav-group a.active{background:var(--panel);color:var(--accent);font-weight:500}

.content{padding:34px 40px 90px;min-width:0}
.content h1{font-size:29px;margin:0 0 22px;line-height:1.35}
.content h2{font-size:20px;margin:38px 0 13px;padding-top:18px;border-top:1px solid var(--line)}
.content h3{font-size:17px;margin:24px 0 9px}
.content h4{font-size:15px;margin:18px 0 7px;color:var(--muted)}
.content .anchor{opacity:0;margin-left:-18px;padding-right:6px;color:var(--muted);font-weight:400}
.content h1:hover .anchor,.content h2:hover .anchor,.content h3:hover .anchor{opacity:1}
.content p{margin:12px 0}
.content ul,.content ol{padding-left:24px}
.content li{margin:5px 0}
.content blockquote{margin:16px 0;padding:10px 18px;border-left:3px solid var(--accent);
  background:var(--panel);border-radius:0 6px 6px 0;color:var(--muted)}
.content blockquote p{margin:4px 0}

.content code{background:var(--code-bg);border:1px solid var(--line);border-radius:4px;
  padding:1px 5px;font-size:13px;font-family:ui-monospace,SFMono-Regular,"Cascadia Code",Consolas,monospace}
.content pre{background:var(--code-bg);border:1px solid var(--line);border-radius:8px;
  padding:15px 17px;overflow-x:auto;margin:16px 0}
.content pre code{background:none;border:none;padding:0;font-size:13px;line-height:1.6}

.content table{border-collapse:collapse;width:100%;margin:18px 0;font-size:14px;display:block;overflow-x:auto}
.content th,.content td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top}
.content th{background:var(--panel);font-weight:600;white-space:nowrap}
.content tr:nth-child(even) td{background:rgba(255,255,255,.015)}
.content hr{border:none;border-top:1px solid var(--line);margin:30px 0}

.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:24px 0}
.home-card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:10px;
  padding:16px 18px;color:var(--fg)}
.home-card:hover{border-color:var(--accent);text-decoration:none}
.home-card h3{margin:0;font-size:15px;font-weight:500}
.home-card::after{content:"→";float:right;color:var(--muted);transition:transform .15s,color .15s}
.home-card:hover::after{color:var(--accent);transform:translateX(3px)}

@media(max-width:860px){
  .topbar{flex-wrap:wrap}
  .search{order:3;flex-basis:100%;max-width:none}
  .ext{margin-left:auto}
  .shell{grid-template-columns:1fr}
  .sidebar{position:static;height:auto;border-right:none;border-bottom:1px solid var(--line)}
  .content{padding:22px 18px 60px}
}