/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .banner h1 {
        font-size: 1.8rem;
    }
    
    .banner p {
        font-size: 1rem;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    footer {
        padding: 1.5rem 0;
    }
    
    footer a {
        display: block;
        margin: 0.5rem 0;
    }
}

@media (max-width: 480px) {
    .banner {
        padding: 2rem 0;
    }
    
    .banner h1 {
        font-size: 1.5rem;
    }
    
    .content-card {
        padding: 1rem;
    }
    
    .error-page h1 {
        font-size: 4rem;
    }
}