/* 响应式样式 */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
    
    .product-categories,
    .solutions-list,
    .cases-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .partners-logo {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .product-categories,
    .solutions-list,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-logo {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .contact-box {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .footer-column {
        flex: 1;
        min-width: 200px;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }
    
    header .container {
        flex-wrap: wrap;
    }
    
    nav {
        display: none;
        width: 100%;
        margin-top: 15px;
    }
    
    nav.active {
        display: block;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav ul li {
        margin: 0;
        border-top: 1px solid #eee;
    }
    
    nav ul li a {
        display: block;
        padding: 10px 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .banner {
        height: 400px;
    }
    
    .slide-content h2 {
        font-size: 32px;
    }
    
    .slide-content p {
        font-size: 18px;
    }
    
    .product-categories,
    .solutions-list,
    .cases-grid,
    .partners-logo {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .product-categories,
    .solutions-list,
    .cases-grid,
    .partners-logo {
        grid-template-columns: 1fr;
    }
    
    .banner {
        height: 300px;
    }
    
    .slide-content {
        left: 5%;
        right: 5%;
    }
    
    .slide-content h2 {
        font-size: 24px;
    }
    
    .slide-content p {
        font-size: 16px;
    }
    
    .section-title h2 {
        font-size: 24px;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-date {
        width: 100%;
        padding: 10px 0;
        flex-direction: row;
        justify-content: center;
        gap: 10px;
    }
}