:root{--bg:#f0f2f5;--card:#fff;--text:#1a1a2e;--text2:#555;--primary:#4f6ef7;--primary-hover:#3b5de7;--success:#22c55e;--danger:#ef4444;--warning:#f59e0b;--border:#e0e0e0;--shadow:0 2px 12px #00000014;--radius:12px;--nav-bg:#1e293b;--nav-text:#cbd5e1;--nav-active:#4f6ef7;--tag-bg:#eef2ff;--tag-text:#4f6ef7;--input-bg:#fff;--table-stripe:#f8fafc;--opt-correct-bg:#dcfce7;--opt-correct-border:#22c55e;--opt-wrong-bg:#fee2e2;--opt-wrong-border:#ef4444;--mark-color:#f59e0b}[data-theme=dark]{--bg:#0f172a;--card:#1e293b;--text:#e2e8f0;--text2:#94a3b8;--border:#334155;--shadow:0 2px 12px #0000004d;--tag-bg:#1e3a5f;--tag-text:#93c5fd;--input-bg:#0f172a;--table-stripe:#1a2332;--opt-correct-bg:#14532d;--opt-correct-border:#22c55e;--opt-wrong-bg:#450a0a;--opt-wrong-border:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}button{cursor:pointer;font-family:inherit}input,select,textarea{font-family:inherit}.app{min-height:100vh;display:flex}.sidebar{background:var(--nav-bg);width:220px;color:var(--nav-text);z-index:100;flex-direction:column;display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar-header{border-bottom:1px solid #ffffff1a;padding:24px 20px 16px}.sidebar-header h1{color:#fff;font-size:18px;font-weight:700}.sidebar-header p{color:#64748b;margin-top:4px;font-size:12px}.nav-items{flex:1;padding:12px 0}.nav-item{cursor:pointer;color:var(--nav-text);border-left:3px solid #0000;align-items:center;gap:10px;padding:12px 20px;font-size:14px;transition:all .2s;display:flex}.nav-item:hover{background:#ffffff0d}.nav-item.active{border-left-color:var(--nav-active);color:#fff;background:#4f6ef726}.nav-item .icon{text-align:center;width:24px;font-size:18px}.sidebar-footer{border-top:1px solid #ffffff1a;padding:12px 20px}.theme-btn{color:var(--nav-text);background:0 0;border:1px solid #fff3;border-radius:8px;width:100%;padding:8px 12px;font-size:13px}.theme-btn:hover{background:#ffffff1a}.main{flex:1;max-width:1100px;margin-left:220px;padding:24px}.page{display:none}.page.active{display:block}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);margin-bottom:20px;padding:24px}.card-title{align-items:center;gap:8px;margin-bottom:16px;font-size:16px;font-weight:600;display:flex}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;margin-bottom:24px;display:grid}.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);text-align:center;padding:20px}.stat-card .num{color:var(--primary);font-size:32px;font-weight:700}.stat-card .label{color:var(--text2);margin-top:4px;font-size:13px}.btn{border:none;border-radius:8px;align-items:center;gap:6px;padding:10px 20px;font-size:14px;font-weight:500;transition:all .2s;display:inline-flex}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#16a34a}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#dc2626}.btn-outline{border:1px solid var(--border);color:var(--text);background:0 0}.btn-outline:hover{background:var(--bg)}.btn-warning{background:var(--warning);color:#fff}.btn-warning:hover{background:#d97706}.btn-sm{border-radius:6px;padding:6px 12px;font-size:12px}.btn-group{flex-wrap:wrap;gap:8px;display:flex}.form-group{margin-bottom:16px}.form-group label{color:var(--text2);margin-bottom:6px;font-size:13px;font-weight:600;display:block}.form-control{border:1px solid var(--border);background:var(--input-bg);width:100%;color:var(--text);border-radius:8px;padding:10px 14px;font-size:14px}.form-control:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #4f6ef726}.form-row{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;display:grid}.form-hint{color:var(--text2);margin-top:4px;font-size:12px}.checkbox-inline{flex-wrap:wrap;align-items:center;gap:16px;padding:8px 0;display:flex}.checkbox-inline label{color:var(--text);cursor:pointer;align-items:center;gap:6px;font-size:14px;display:flex}.upload-area{border:2px dashed var(--border);border-radius:var(--radius);text-align:center;cursor:pointer;background:var(--card);padding:48px 24px;transition:all .3s}.upload-area:hover{border-color:var(--primary);background:var(--tag-bg)}.upload-area .icon{margin-bottom:12px;font-size:48px}.upload-area p{color:var(--text2);font-size:14px}.upload-area .hint{color:#999;margin-top:8px;font-size:12px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:13px}th{background:var(--bg);text-align:left;color:var(--text2);border-bottom:2px solid var(--border);white-space:nowrap;padding:10px 12px;font-weight:600}td{border-bottom:1px solid var(--border);color:var(--text);padding:10px 12px}tr:nth-child(2n) td{background:var(--table-stripe)}tr:hover td{background:var(--tag-bg)}.type-tag{border-radius:12px;padding:2px 10px;font-size:11px;font-weight:600;display:inline-block}.type-tag.single{color:#2563eb;background:#dbeafe}.type-tag.multiple{color:#d97706;background:#fef3c7}.type-tag.judge{color:#059669;background:#d1fae5}.quiz-progress{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);flex-wrap:wrap;align-items:center;gap:16px;margin-bottom:20px;padding:16px 24px;display:flex}.progress-bar{background:var(--border);border-radius:4px;flex:1;min-width:100px;height:8px;overflow:hidden}.progress-fill{background:var(--primary);border-radius:4px;height:100%;transition:width .3s}.progress-text{color:var(--text2);white-space:nowrap;font-size:13px;font-weight:600}.question-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;padding:24px}.question-header{align-items:flex-start;gap:12px;margin-bottom:16px;display:flex}.question-num{background:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:13px;font-weight:700;display:flex}.question-text{flex:1;font-size:15px;line-height:1.6}.options-list{flex-direction:column;gap:8px;padding-left:40px;display:flex}.option-item{border:1px solid var(--border);cursor:pointer;border-radius:8px;align-items:center;gap:10px;padding:10px 14px;font-size:14px;transition:all .2s;display:flex}.option-item:hover{border-color:var(--primary);background:var(--tag-bg)}.option-item.selected{border-color:var(--primary);background:var(--tag-bg);font-weight:500}.option-item input{accent-color:var(--primary);width:16px;height:16px}.option-item.review-correct{border-color:var(--opt-correct-border);background:var(--opt-correct-bg);font-weight:600}.option-item.review-wrong{border-color:var(--opt-wrong-border);background:var(--opt-wrong-bg)}.page-nav{justify-content:center;align-items:center;gap:12px;margin:20px 0;padding:12px;display:flex}.page-nav-btn{border:1px solid var(--border);background:var(--card);color:var(--text);cursor:pointer;border-radius:8px;padding:8px 16px;font-size:13px}.page-nav-btn:hover{border-color:var(--primary);color:var(--primary)}.page-nav-btn:disabled{opacity:.4;cursor:not-allowed}.page-nav-info{color:var(--text2);font-size:13px;font-weight:600}.quiz-nav{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:12px;margin-top:24px;display:flex}.panel-toggle{z-index:500;background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:48px;height:48px;font-size:20px;display:none;position:fixed;bottom:80px;right:20px;box-shadow:0 4px 16px #4f6ef766}.panel-toggle:hover{transform:scale(1.1)}.panel-toggle.show{display:flex}.question-panel{z-index:600;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;width:180px;max-height:calc(100vh - 100px);display:none;position:fixed;top:80px;right:20px;box-shadow:0 8px 32px #00000026}.question-panel.show{display:flex}.question-panel.collapsed .panel-body{display:none}.panel-header{border-bottom:1px solid var(--border);cursor:move;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.panel-header h4{pointer-events:none;font-size:13px;font-weight:600}.panel-toggle-icon{color:var(--text2);cursor:pointer;background:0 0;border:none;padding:0 2px;font-size:14px;transition:transform .2s}.panel-close-btn{color:var(--text2);cursor:pointer;background:0 0;border:none;padding:0 2px;font-size:16px}.panel-close-btn:hover{color:var(--danger)}.panel-body{flex:1;padding:10px;overflow-y:auto}.panel-actions{border-top:1px solid var(--border);gap:6px;padding:10px;display:flex}.panel-abandon-btn{border:1px solid var(--danger);color:var(--danger);cursor:pointer;background:0 0;border-radius:6px;flex:1;padding:8px;font-size:12px;font-weight:500}.panel-abandon-btn:hover{background:var(--opt-wrong-bg)}.panel-submit-btn{background:var(--success);color:#fff;cursor:pointer;border:none;border-radius:6px;flex:1;padding:8px;font-size:12px;font-weight:500}.panel-submit-btn:hover{background:#16a34a}.panel-group-label{color:var(--text2);border-bottom:1px dashed var(--border);justify-content:space-between;margin-bottom:6px;padding:6px 0 4px;font-size:10px;font-weight:700;display:flex}.panel-group-label .count{color:var(--tag-text);font-weight:400}.pdot-row{flex-wrap:wrap;gap:4px;margin-bottom:8px;display:flex}.pdot{border:2px solid var(--border);cursor:pointer;width:30px;height:30px;color:var(--text2);background:var(--card);border-radius:6px;justify-content:center;align-items:center;font-size:10px;font-weight:600;transition:all .15s;display:flex;position:relative}.pdot:hover{border-color:var(--primary)}.pdot.current{border-color:var(--primary);color:var(--primary);background:var(--tag-bg)}.pdot.answered{background:var(--primary);border-color:var(--primary);color:#fff}.pdot.marked:after{content:"";background:var(--mark-color);border:1.5px solid var(--card);border-radius:50%;width:8px;height:8px;position:absolute;top:-2px;right:-2px}.pdot.marked-answered{background:var(--primary);border-color:var(--primary);color:#fff}.pdot.marked-answered:after{content:"";background:var(--mark-color);border:1.5px solid var(--primary);border-radius:50%;width:8px;height:8px;position:absolute;top:-2px;right:-2px}.mark-btn{border:1px solid var(--border);cursor:pointer;color:var(--text2);background:0 0;border-radius:8px;align-items:center;gap:4px;padding:6px 12px;font-size:13px;transition:all .2s;display:flex}.mark-btn:hover{border-color:var(--mark-color);color:var(--mark-color)}.mark-btn.active{border-color:var(--mark-color);color:var(--mark-color);background:#fef3c7;font-weight:600}[data-theme=dark] .mark-btn.active{background:#78350f}.set-bar{background:var(--tag-bg);border-radius:8px;justify-content:space-between;align-items:center;margin-bottom:16px;padding:10px 16px;font-size:13px;display:flex}.set-bar .set-label{color:var(--tag-text);font-weight:600}.result-score{text-align:center;padding:32px}.result-score .score{color:var(--primary);font-size:64px;font-weight:800}.result-score .total{color:var(--text2);font-size:24px}.result-stats{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin:20px 0;display:grid}.result-stat{text-align:center;background:var(--bg);border-radius:8px;padding:12px}.result-stat .val{font-size:24px;font-weight:700}.result-stat .lbl{color:var(--text2);margin-top:4px;font-size:12px}.wrong-item{border-left:4px solid var(--danger);background:var(--bg);border-radius:0 8px 8px 0;margin-bottom:16px;padding:16px}.wrong-item .q-text{margin-bottom:12px;font-size:14px;line-height:1.5}.wrong-item .answer-row{flex-wrap:wrap;gap:16px;font-size:13px;display:flex}.wrong-item .your-ans{color:var(--danger);font-weight:600}.wrong-item .correct-ans{color:var(--success);font-weight:600}.modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;padding:20px;display:none;position:fixed;inset:0}.modal-overlay.show{display:flex}.modal{background:var(--card);border-radius:var(--radius);width:100%;max-width:600px;max-height:80vh;padding:24px;overflow-y:auto;box-shadow:0 20px 60px #0000004d}.modal h3{margin-bottom:16px;font-size:18px}.modal-actions{justify-content:flex-end;gap:8px;margin-top:20px;display:flex}.toast-container{z-index:2000;flex-direction:column;gap:8px;display:flex;position:fixed;top:20px;right:20px}.toast{color:#fff;border-radius:8px;max-width:360px;padding:12px 20px;font-size:14px;animation:.3s slideIn}.toast.success{background:var(--success)}.toast.error{background:var(--danger)}.toast.info{background:var(--primary)}@keyframes slideIn{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.empty-state{text-align:center;color:var(--text2);padding:48px 24px}.empty-state .icon{margin-bottom:12px;font-size:48px}.empty-state p{font-size:14px}.config-summary{flex-wrap:wrap;gap:16px;margin-bottom:20px;display:flex}.config-chip{background:var(--tag-bg);color:var(--tag-text);border-radius:20px;padding:6px 14px;font-size:13px;font-weight:500}.filter-bar{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:16px;display:flex}.filter-chip{border:1px solid var(--border);cursor:pointer;background:var(--card);color:var(--text);border-radius:20px;padding:6px 14px;font-size:13px}.filter-chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}.wb-count{background:var(--danger);color:#fff;border-radius:10px;margin-left:4px;padding:1px 8px;font-size:11px;font-weight:700;display:inline-block}@media (width<=768px){.sidebar{flex-direction:row;width:100%;height:56px;position:fixed;top:auto;bottom:0}.sidebar-header,.sidebar-footer{display:none}.nav-items{width:100%;padding:0;display:flex}.nav-item{border-top:3px solid #0000;border-left:none;flex:1;justify-content:center;padding:8px;font-size:11px}.nav-item.active{border-top-color:var(--nav-active)}.main{margin-left:0;padding:16px 16px 72px}.form-row{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.options-list{padding-left:0}.question-header,.btn-group{flex-direction:column}.quiz-progress{flex-direction:column;align-items:flex-start}.question-panel{width:160px;top:60px;right:10px}}