:root{--bg:#0b0f14;--panel:#0f1720;--card:#111c27;--text:#e7eef7;--muted:#9fb0c3;--link:#7fd1ff;--line:#223244;--accent:#9ad0ff;}
*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"PingFang SC","Noto Sans CJK SC",sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
.topbar{position:sticky;top:0;z-index:10;display:flex;gap:16px;align-items:center;justify-content:space-between;padding:12px 16px;background:rgba(11,15,20,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{font-weight:700} .tag{margin-left:10px;color:var(--muted);font-weight:500;font-size:12px;border:1px solid var(--line);padding:2px 8px;border-radius:999px}
.topnav{display:flex;flex-wrap:wrap;gap:12px;font-size:14px}
.layout{display:grid;grid-template-columns:260px 1fr;min-height:calc(100vh - 54px)}
.sidebar{border-right:1px solid var(--line);background:var(--panel);padding:16px;overflow:auto}
.content{padding:24px;max-width:980px}
.navtitle{color:var(--muted);font-size:12px;margin-bottom:8px}
.navitem{display:block;padding:8px 10px;border-radius:8px;color:var(--text);border:1px solid transparent}
.navitem:hover{background:rgba(154,208,255,.08);border-color:rgba(154,208,255,.18);text-decoration:none}
.navitem.active{background:rgba(154,208,255,.12);border-color:rgba(154,208,255,.25)}
.content h1{margin-top:0;font-size:28px} .content h2{margin-top:28px} .content h3{margin-top:22px}
.content p, .content li{line-height:1.75;color:#d9e6f2}
.content blockquote{border-left:3px solid rgba(154,208,255,.4);margin:16px 0;padding:10px 14px;background:rgba(154,208,255,.06);color:#d6e9ff}
.content code{background:rgba(255,255,255,.06);padding:2px 6px;border-radius:6px}
.content pre{background:rgba(255,255,255,.06);padding:12px;border-radius:12px;overflow:auto;border:1px solid var(--line)}
hr{border:0;border-top:1px solid var(--line);margin:22px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin:14px 0}
.kpi{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.kpi .box{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;padding:12px}
.kpi .label{color:var(--muted);font-size:12px} .kpi .value{font-size:20px;font-weight:700;margin-top:6px}
.footer{margin-top:40px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}
.muted{color:var(--muted)}
@media (max-width: 980px){.layout{grid-template-columns:1fr}.sidebar{display:none}}