/* 平板设备 */
@media (max-width: 768px) {
    .version-cards {
        grid-template-columns: 1fr;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .features-section {
        flex-direction: column;
        align-items: center;
    }
    
    .feature {
        width: 100%;
        max-width: 100%;
    }
    
    body {
        padding: 15px;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .card {
        padding: 20px;
    }
    
    .header {
        padding: 15px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .warnings, .footer {
        padding: 20px;
    }
    
    .card-title {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .card-title h2 {
        font-size: 1.3rem;
    }
    
    .age-notice {
        font-size: 16px;
        padding: 12px;
    }
}

/* 大屏幕设备 */
@media (min-width: 1200px) {
    .version-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 打印优化 */
@media print {
    body {
        background: none;
        padding: 0;
    }
    
    .container {
        max-width: 100%;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ccc;
        margin-bottom: 15px;
        page-break-inside: avoid;
    }
    
    .btn-group, .age-notice, .features-section {
        display: none;
    }
}