:root{--ink: #101828;--muted: #667085;--line: #d9e2ec;--paper: #ffffff;--soft: #f5f7fb;--blue: #2458a6;--teal: #087f7a;--rose: #a33d5f;--gold: #8a6500;--green: #157347;--shadow: 0 18px 50px rgba(16, 24, 40, .12)}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:#eef2f7;font-family:Microsoft YaHei,Segoe UI,Arial,sans-serif;letter-spacing:0}.app-shell{min-height:100vh;display:grid;grid-template-columns:360px minmax(0,1fr)}.app-shell.sidebar-collapsed{grid-template-columns:76px minmax(0,1fr)}.sidebar{background:#0f172a;color:#fff;padding:22px 18px;overflow:auto;border-right:1px solid rgba(255,255,255,.1);transition:padding .18s ease}.sidebar-collapsed .sidebar{padding:18px 12px;overflow:hidden}.brand-block{display:flex;gap:12px;align-items:center;padding:8px 4px 18px;position:relative}.brand-mark{width:44px;height:44px;display:grid;place-items:center;background:#f8fafc;color:#0f172a;border-radius:6px;font-weight:800}.brand-block h1{font-size:18px;margin:0 0 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