/* 响应式设计 */

/* 平板设备 (768px - 1024px) */
@media screen and (max-width: 1024px) {
    .hero-title {
        font-size: 36px;
    }

    .section-title {
        font-size: 28px;
    }

    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .app-intro-content {
        flex-direction: column;
        text-align: center;
    }

    .download-content {
        flex-direction: column;
        text-align: center;
    }

    .download-text {
        text-align: center;
    }
}

/* 移动设备 (最大宽度 768px) */
@media screen and (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    /* 导航栏 */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: var(--secondary-color);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        transition: left 0.3s;
        z-index: 999;
    }

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

    .nav-menu ul {
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }

    .nav-menu li {
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu a {
        display: block;
        padding: 15px 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    /* Hero 区域 */
    .hero {
        padding: 50px 0;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    /* 通用区块 */
    .section-title {
        font-size: 24px;
        margin-bottom: 30px;
    }

    .platform-intro,
    .product-categories,
    .value-services,
    .designers,
    .qr-section {
        padding: 50px 0;
    }

    /* 产品类别 */
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .category-image {
        height: 300px;
    }

    /* 增值服务 */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 合作设计师 */
    .designers-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    /* 页脚 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* 页面标题 */
    .page-title {
        font-size: 28px;
        padding: 40px 0 30px;
    }

    /* 产品页面 */
    .category-filter {
        justify-content: flex-start;
    }

    .filter-btn {
        font-size: 13px;
        padding: 8px 15px;
    }

    .filter-toolbar {
        flex-direction: column;
        gap: 15px;
    }

    .filter-group {
        width: 100%;
    }

    .filter-group select {
        flex: 1;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 关于我们页面 */
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .service-detail-item {
        flex-direction: column;
        gap: 15px;
    }

    /* 应用介绍页面 */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .guide-step {
        flex-direction: column;
        gap: 15px;
    }

    /* 联系我们页面 */
    .contact-info {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .contact-form {
        padding: 25px 20px;
    }
}

/* 小屏移动设备 (最大宽度 480px) */
@media screen and (max-width: 480px) {
    .logo h1 {
        font-size: 24px;
    }

    .logo-subtitle {
        font-size: 10px;
    }

    .hero-title {
        font-size: 24px;
    }

    .hero-features {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 20px;
    }

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

    .qr-code img,
    .app-qr-code img,
    .download-qr img {
        width: 150px;
        height: 150px;
    }

    .btn-primary {
        padding: 10px 30px;
        font-size: 14px;
    }
}