:root{--primary:#2563eb;--primary-light:#3b82f6;--primary-dark:#1d4ed8;--primary-bg:#eff6ff;--primary-border:#bfdbfe;--success:#16a34a;--warning:#f59e0b;--danger:#dc2626;--text:#1e293b;--text-secondary:#64748b;--text-light:#94a3b8;--bg:#f8fafc;--card-bg:#fff;--border:#e2e8f0;--shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);--shadow-lg:0 10px 25px rgba(0,0,0,.1);--radius:12px;--radius-sm:8px;--transition:.3s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:linear-gradient(135deg,#e0e7ff 0%,#f0f4ff 50%,#eff6ff 100%);min-height:100vh;color:var(--text);line-height:1.6;padding:20px}.quiz-container{max-width:720px;margin:0 auto;background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow-lg);overflow:hidden}.quiz-header{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;padding:32px 28px 24px;text-align:center}.quiz-header h1{font-size:24px;font-weight:700;margin-bottom:6px;letter-spacing:.5px}.quiz-header .subtitle{font-size:14px;opacity:.85;font-weight:400}.progress-section{padding:20px 28px 0}.progress-label{display:flex;justify-content:space-between;font-size:13px;color:var(--text-secondary);margin-bottom:6px}.progress-bar{height:6px;background:var(--border);border-radius:3px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary-light),var(--primary));border-radius:3px;transition:width .5s ease;width:0}.pagination-nav{display:flex;justify-content:center;gap:6px;padding:12px 28px 0}.page-dot{width:32px;height:32px;border-radius:50%;border:2px solid var(--border);background:var(--card-bg);color:var(--text-secondary);font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition)}.page-dot:hover{border-color:var(--primary-light);color:var(--primary)}.page-dot.active{background:var(--primary);border-color:var(--primary);color:#fff}.page-dot.completed{border-color:var(--success);color:var(--success)}.page-dot.completed:after{content:'✓'}.quiz-body{padding:24px 28px}.section-title{font-size:13px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}.page-title{font-size:18px;font-weight:700;color:var(--text);margin-bottom:20px}.question{margin-bottom:22px;padding:18px;background:var(--bg);border-radius:var(--radius-sm);border:1px solid var(--border);transition:border-color var(--transition)}.question:last-child{margin-bottom:0}.question.answered{border-color:var(--primary-border);background:var(--primary-bg)}.question-number{font-size:12px;font-weight:600;color:var(--primary);margin-bottom:4px}.question-text{font-size:15px;font-weight:500;color:var(--text);margin-bottom:12px}.options{display:flex;flex-wrap:wrap;gap:8px}.option-label{display:flex;align-items:center;gap:6px;padding:8px 14px;border:1.5px solid var(--border);border-radius:20px;font-size:13px;color:var(--text-secondary);cursor:pointer;transition:all var(--transition);user-select:none}.option-label:hover{border-color:var(--primary-light);color:var(--primary);background:var(--primary-bg)}.option-label input[type=radio]{appearance:none;-webkit-appearance:none;width:16px;height:16px;border:2px solid var(--border);border-radius:50%;margin:0;position:relative;cursor:pointer;transition:all var(--transition);flex-shrink:0}.option-label input[type=radio]:checked{border-color:var(--primary);background:var(--primary)}.option-label input[type=radio]:checked:after{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:6px;height:6px;background:#fff;border-radius:50%}.option-label:has(input:checked){border-color:var(--primary);color:var(--primary);background:var(--primary-bg);font-weight:500}.btn-row{display:flex;justify-content:space-between;gap:12px;padding:20px 28px 28px}.btn{padding:12px 28px;border:none;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;transition:all var(--transition);display:inline-flex;align-items:center;gap:6px}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-prev{background:var(--bg);color:var(--text-secondary);border:1.5px solid var(--border)}.btn-prev:hover:not(:disabled){background:var(--border);color:var(--text)}.btn-next{background:var(--primary);color:#fff;margin-left:auto}.btn-next:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3)}.btn-submit{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;padding:12px 36px;font-size:16px;letter-spacing:.5px;margin-left:auto}.btn-submit:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 16px rgba(37,99,235,.4)}.result-section{padding:0 28px 28px}.result-card{background:linear-gradient(135deg,var(--primary-bg) 0%,#f0f4ff 100%);border:2px solid var(--primary-border);border-radius:var(--radius);padding:28px;text-align:center;animation:fadeInUp .6s ease}@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.result-badge{display:inline-block;padding:4px 16px;border-radius:20px;font-size:13px;font-weight:600;margin-bottom:16px}.badge-excellent{background:#dcfce7;color:#166534}.badge-good{background:#dbeafe;color:#1e40af}.badge-average{background:#fef3c7;color:#92400e}.badge-poor{background:#fee2e2;color:#991b1b}.result-age{font-size:56px;font-weight:800;color:var(--primary);line-height:1;margin-bottom:4px}.result-label{font-size:16px;color:var(--text-secondary);margin-bottom:16px}.result-compare{font-size:14px;color:var(--text-secondary);padding:12px;background:#fff;border-radius:var(--radius-sm);margin-bottom:16px}.result-compare strong{color:var(--text)}.result-compare .positive{color:var(--success);font-weight:600}.result-compare .negative{color:var(--danger);font-weight:600}.tips-section{margin-top:20px;text-align:left}.tips-title{font-size:16px;font-weight:700;color:var(--text);margin-bottom:12px;display:flex;align-items:center;gap:6px}.tip-item{display:flex;align-items:flex-start;gap:10px;padding:12px 16px;background:#fff;border-radius:var(--radius-sm);border-left:3px solid var(--primary);margin-bottom:10px;animation:fadeInUp .5s ease forwards;opacity:0}.tip-item:nth-child(1){animation-delay:.2s}.tip-item:nth-child(2){animation-delay:.4s}.tip-item:nth-child(3){animation-delay:.6s}.tip-icon{font-size:18px;flex-shrink:0;margin-top:1px}.tip-content{font-size:14px;color:var(--text);line-height:1.5}.tip-content strong{color:var(--primary)}.quiz-footer{padding:16px 28px 20px;text-align:center;border-top:1px solid var(--border)}.quiz-footer p{font-size:12px;color:var(--text-light);line-height:1.6;margin-bottom:4px}.quiz-footer a{color:var(--primary-light);text-decoration:none}.quiz-footer a:hover{text-decoration:underline}.btn-restart{background:var(--bg);color:var(--primary);border:1.5px solid var(--primary-border);padding:10px 24px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:all var(--transition);margin-top:12px}.btn-restart:hover{background:var(--primary-bg);border-color:var(--primary)}@media (max-width:600px){body{padding:10px}.quiz-header{padding:24px 20px 18px}.quiz-header h1{font-size:20px}.quiz-body{padding:18px 16px}.question{padding:14px}.option-label{font-size:12px;padding:6px 12px}.btn-row{padding:16px 16px 20px}.btn{padding:10px 20px;font-size:14px}.result-age{font-size:44px}.pagination-nav{gap:4px}.page-dot{width:28px;height:28px;font-size:11px}.section-title{font-size:12px}.page-title{font-size:16px}}