:root{--bg:#f5f7fb;--card:#fff;--text:#162033;--muted:#7d8799;--line:#e8edf4;--accent:#2667ff;--nav:#0f1726;--danger:#ff5a67}*{box-sizing:border-box}body{margin:0;font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:230px;background:var(--nav);color:#dbe5f7;padding:24px 16px;display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0}.brand{display:flex;gap:10px;align-items:center;padding:0 10px 24px}.brand-dot{width:16px;height:16px;border-radius:6px;background:linear-gradient(145deg,#66a3ff,#8f7dff)}.brand strong{display:block;font-size:18px}.brand small{display:block;color:#7f8ba1;margin-top:3px}.sidebar nav{display:grid;gap:8px}.sidebar nav a{padding:12px 14px;border-radius:10px;color:#9facbf}.sidebar nav a.active,.sidebar nav a:hover{background:#1d2a40;color:#fff}.side-foot{margin-top:auto;padding:10px 12px;color:#8d9bb0}.main{margin-left:230px;padding:30px;min-width:0;width:100%}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.topbar h1{margin:0;font-size:28px}.topbar p{margin:6px 0 0;color:var(--muted)}.avatar{width:46px;height:46px;border-radius:14px;background:#101a2b;color:#fff;display:grid;place-items:center;font-weight:700}.grid.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:0 4px 20px rgba(32,50,80,.04);margin-bottom:16px}.metric span{color:var(--muted);font-size:14px}.metric strong{font-size:34px;display:block;margin:10px 0 3px}.metric small{color:#9aa4b5}.metric.danger strong{color:var(--danger)}.ai-card{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(120deg,#101b31,#1e315b);color:#fff;border:0;padding:26px}.ai-card 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14px;cursor:pointer}.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}.inline-form{display:flex;gap:7px;align-items:center}.inline-form input{width:70px}.hint{background:#fbfcff}.hint p{color:var(--muted);line-height:1.7}.login-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 15% 10%,#e9efff,transparent 30%),#f6f8fc}.login-card{width:min(420px,92vw);background:#fff;padding:34px;border:1px solid var(--line);border-radius:22px;box-shadow:0 22px 60px rgba(30,50,90,.12)}.login-card h1{margin:14px 0 8px}.login-card p{color:var(--muted);margin-bottom:26px}.login-card form{display:grid;gap:10px}.login-card label{font-size:13px;color:#59667a}.login-card small{display:block;color:#9aa4b5;margin-top:16px}.login-badge{display:inline-block;background:#eef3ff;color:#2b63db;padding:7px 10px;border-radius:999px;font-size:12px}.alert{padding:10px 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