/* 平板设备 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .options-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .test-controls {
        flex-direction: column;
        gap: 10px;
    }
    
    .test-controls button {
        width: 100%;
    }
    
    .admin-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    header h1 {
        font-size: 24px;
    }
    
    .intro-section {
        padding: 20px;
    }
    
    .test-content {
        padding: 15px;
    }
    
    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modal-content {
        width: 90%;
        margin: 10% auto;
    }
    
    .data-table {
        font-size: 14px;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 4px;
    }
}