:root{--bg:#f7f9fc;--panel:#fff;--text:#172033;--muted:#64748b;--line:#e2e8f0;--soft:#f1f5f9;--primary:#2563eb;--shadow:0 14px 34px rgba(15,23,42,.07)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}.shell{min-height:100vh;display:flex}.nav{width:260px;background:rgba(255,255,255,.92);border-right:1px solid var(--line);padding:24px;position:sticky;top:0;height:100vh;backdrop-filter:blur(10px)}.nav h1{margin:0;font-size:24px}.nav p{color:var(--muted);margin:8px 0 24px}.nav a{display:block;text-decoration:none;color:var(--text);padding:13px 14px;border-radius:14px;margin:8px 0;font-weight:800;border:1px solid transparent}.nav a:hover,.nav a.active{background:#dbeafe;border-color:#bfdbfe;color:#1d4ed8}.home{flex:1;padding:34px}.hero{background:var(--panel);border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:var(--shadow)}.hero h2{margin:0 0 8px;font-size:34px}.hero p{margin:0;color:var(--muted)}.entry-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:18px}.entry-card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:26px;padding:26px;text-decoration:none;color:var(--text);min-height:160px;box-shadow:var(--shadow);transition:.15s ease}.entry-card:hover{transform:translateY(-2px);border-color:#bfdbfe}.entry-card b{display:block;font-size:24px;margin-bottom:12px}.entry-card span{line-height:1.7;color:var(--muted)}.login-body{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top left,#dbeafe,transparent 30%),linear-gradient(135deg,#f8fafc,#eef2ff)}.login-card{width:min(420px,92vw);background:#fff;border:1px solid var(--line);border-radius:30px;padding:32px;box-shadow:0 24px 80px rgba(15,23,42,.14);text-align:center}.brand-dot{width:54px;height:54px;background:#2563eb;border-radius:18px;margin:0 auto 14px;box-shadow:0 12px 26px rgba(37,99,235,.22)}.login-card h1{margin:0 0 8px}.login-card p{color:var(--muted)}.login-card input{width:100%;height:50px;border:1px solid var(--line);border-radius:16px;padding:0 14px;font-size:16px}.login-card input:focus{outline:none;border-color:#93c5fd;box-shadow:0 0 0 4px rgba(37,99,235,.1)}.login-card button{width:100%;height:50px;border:0;border-radius:16px;background:#2563eb;color:#fff;font-weight:850;font-size:16px;margin-top:12px}.error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca;border-radius:14px;padding:10px;margin:12px 0}@media(max-width:860px){.shell{display:block}.nav{width:100%;height:auto;position:static}.entry-grid{grid-template-columns:1fr}.home{padding:16px}}