/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .slide-content h2 {
        font-size: 2rem;
    }

    .slide-content p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .products-grid,
    .products-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .product-image {
        height: 150px;
    }

    .product-filters {
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .category-grid {
        grid-template-columns: 1fr;
    }

    .products-grid,
    .products-list {
        grid-template-columns: 1fr;
    }

    .hero {
        height: 400px;
    }

    .slide-content h2 {
        font-size: 1.5rem;
    }

    .slide-content p {
        font-size: 0.9rem;
    }

    .product-image {
        height: 180px;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .container {
        padding: 0 15px;
    }
}

/* 图片优化 - 移动端 */
@media (max-width: 768px) {
    img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
    
    .product-image img,
    .news-image img {
        will-change: transform;
    }
}