:root{--bg: #f5f6f8;--surface: #ffffff;--border: #e3e6ea;--text: #1f2328;--text-dim: #656d76;--primary: #2563eb;--primary-dim: #dbeafe;--success: #16a34a;--success-dim: #dcfce7;--warn: #d97706;--warn-dim: #fef3c7;--danger: #dc2626;--danger-dim: #fee2e2;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:14px;line-height:1.6;color:var(--text);background:var(--bg)}h1,h2,h3,h4{margin:0 0 12px;font-weight:600;line-height:1.3}h1{font-size:22px}h2{font-size:18px}h3{font-size:16px}h4{font-size:14px}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}code,pre{font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:13px}.layout{min-height:100vh;display:flex;flex-direction:column}.topbar{height:52px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:20px;padding:0 20px;position:sticky;top:0;z-index:20}.topbar .brand{font-weight:700;font-size:15px;color:var(--text)}.topbar nav{display:flex;gap:4px;flex:1}.topbar nav a{padding:6px 12px;border-radius:6px;color:var(--text-dim);font-weight:500}.topbar nav a.router-link-active{background:var(--primary-dim);color:var(--primary)}.topbar nav a:hover{text-decoration:none;background:#f0f2f5}.topbar nav a.router-link-active:hover{background:var(--primary-dim)}.topbar .user{display:flex;align-items:center;gap:10px;color:var(--text-dim);font-size:13px}.container{max-width:1080px;margin:0 auto;padding:24px 20px;width:100%}.container.wide{max-width:1400px}.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;gap:12px;flex-wrap:wrap}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.card+.card{margin-top:14px}.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;gap:10px}button,.btn{font-family:inherit;font-size:13px;font-weight:500;padding:7px 14px;border-radius:6px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:background .12s,border-color .12s}button:hover:not(:disabled),.btn:hover{background:#f0f2f5}button:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:#1d4ed8}.btn-danger{background:var(--danger);border-color:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#b91c1c}.btn-ghost{border-color:transparent;background:transparent;color:var(--text-dim)}.btn-ghost:hover:not(:disabled){background:#f0f2f5}.btn-sm{padding:4px 10px;font-size:12px}input[type=text],input[type=password],input[type=number],input[type=datetime-local],select,textarea{font-family:inherit;font-size:13px;padding:7px 10px;border:1px solid var(--border);border-radius:6px;background:var(--surface);color:var(--text);width:100%}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-dim)}textarea{resize:vertical;min-height:80px;line-height:1.5}.field{margin-bottom:14px}.field label{display:block;font-size:12px;font-weight:600;color:var(--text-dim);margin-bottom:5px}.field .hint{font-size:12px;color:var(--text-dim);margin-top:4px}.row{display:flex;gap:10px;align-items:center}.row.wrap{flex-wrap:wrap}.grow{flex:1}table{width:100%;border-collapse:collapse;font-size:13px}th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--border)}th{font-weight:600;color:var(--text-dim);font-size:12px;background:#fafbfc}tbody tr:hover{background:#fafbfc}tbody tr:last-child td{border-bottom:none}.tag{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600;background:#eef1f4;color:var(--text-dim)}.tag.primary{background:var(--primary-dim);color:var(--primary)}.tag.success{background:var(--success-dim);color:var(--success)}.tag.warn{background:var(--warn-dim);color:var(--warn)}.tag.danger{background:var(--danger-dim);color:var(--danger)}.alert{padding:10px 14px;border-radius:6px;font-size:13px;margin-bottom:14px;border:1px solid transparent}.alert.error{background:var(--danger-dim);color:#991b1b;border-color:#fecaca}.alert.success{background:var(--success-dim);color:#166534;border-color:#bbf7d0}.alert.info{background:var(--primary-dim);color:#1e40af;border-color:#bfdbfe}.alert.warn{background:var(--warn-dim);color:#92400e;border-color:#fde68a}.empty{padding:40px;text-align:center;color:var(--text-dim);font-size:13px}.muted{color:var(--text-dim)}.small{font-size:12px}.mono{font-family:SFMono-Regular,Consolas,monospace}.q-stem{font-size:15px;line-height:1.7;margin-bottom:14px;white-space:pre-wrap}.option-list{display:flex;flex-direction:column;gap:8px}.option{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:6px;cursor:pointer;transition:border-color .12s,background .12s}.option:hover{border-color:var(--primary);background:#fafbff}.option.selected{border-color:var(--primary);background:var(--primary-dim)}.option input{margin-top:3px}.option .key{font-weight:700;color:var(--text-dim);min-width:18px}.option.correct{border-color:var(--success);background:var(--success-dim)}.option.wrong{border-color:var(--danger);background:var(--danger-dim)}.blank-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}.blank-row label{min-width:70px;font-size:13px;color:var(--text-dim)}.loading{padding:40px;text-align:center;color:var(--text-dim)}