/* ===================================
   响应式设计 - 平板设备
   =================================== */
@media (max-width: 1024px) {
    .container {
        padding: 0 32px;
    }

    /* 主视觉 */
    .hero-title {
        font-size: 48px;
    }

    /* 产品网格 */
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 选择理由 */
    .reasons-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 性能展示 */
    .performance-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 案例布局 */
    .cases-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    /* 页脚 */
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===================================
   响应式设计 - 移动设备
   =================================== */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    /* 导航栏 */
    .header-content {
        height: 60px;
    }

    .logo img {
        height: 32px;
    }

    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background-color: var(--bg-dark);
        padding: 32px 0;
        opacity: 0;
        visibility: hidden;
        transform: translateX(-100%);
        transition: var(--transition);
    }

    .nav.active {
        opacity: 1;
        visibility: visible;
        transform: translateX(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
        align-items: stretch;
    }

    .nav-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-link {
        display: block;
        padding: 16px 32px;
        font-size: 16px;
    }

    .header-actions {
        gap: 12px;
    }

    .header-link {
        display: none;
    }

    .btn-contact {
        padding: 8px 16px;
        font-size: 13px;
    }

    .mobile-toggle {
        display: flex;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }

    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    /* 主视觉 */
    .hero {
        height: 70vh;
        min-height: 500px;
    }

    .hero-title {
        font-size: 32px;
        padding: 0 20px;
    }

    .scroll-indicator {
        bottom: 24px;
    }

    /* 筛选区 */
    .filter-section {
        padding: 40px 0;
    }

    .filter-card {
        padding: 24px;
    }

    .filter-row {
        flex-direction: column;
        gap: 16px;
    }

    .filter-group {
        min-width: 100%;
    }

    .btn-search {
        width: 100%;
        padding: 14px;
    }

    /* 产品区 */
    .products-section {
        padding: 60px 0;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        margin-bottom: 32px;
    }

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

    .section-nav {
        order: 3;
    }

    .view-more {
        order: 2;
    }

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

    .product-image {
        height: 240px;
    }

    /* 关于我们 */
    .about-section {
        padding: 60px 0;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .about-desc {
        font-size: 15px;
    }

    .about-images {
        grid-template-columns: 1fr;
    }

    /* 选择理由 */
    .reasons-section {
        padding: 60px 0;
    }

    .section-title-center {
        font-size: 28px;
        margin-bottom: 40px;
    }

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

    .reason-card {
        padding: 24px;
    }

    /* 性能展示 */
    .performance-section {
        padding: 60px 0;
    }

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

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

    /* 案例展示 */
    .cases-section {
        padding: 60px 0;
    }

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

    .case-detail {
        padding: 24px;
    }

    .case-name {
        font-size: 20px;
    }

    .case-desc {
        font-size: 14px;
    }

    .case-tags {
        flex-wrap: wrap;
    }

    .case-item {
        flex-direction: column;
        gap: 12px;
        padding: 20px;
    }

    .case-item-title {
        font-size: 16px;
    }

    /* CTA */
    .cta-section {
        padding: 60px 0;
    }

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

    .cta-desc {
        font-size: 16px;
    }

    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-cta-primary,
    .btn-cta-secondary {
        width: 100%;
        padding: 14px;
    }

    /* 页脚 */
    .footer {
        padding: 40px 0 20px;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 32px;
        margin-bottom: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    /* 返回顶部 */
    .back-top {
        bottom: 24px;
        right: 24px;
        width: 44px;
        height: 44px;
    }
}

/* ===================================
   响应式设计 - 小屏手机
   =================================== */
@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }

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

    .section-title-center,
    .section-title-white {
        font-size: 24px;
    }

    .about-title,
    .cases-title {
        font-size: 24px;
    }

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

    .product-info {
        padding: 20px;
    }

    .product-title {
        font-size: 18px;
    }

    .reason-icon {
        width: 60px;
        height: 60px;
    }

    .reason-title {
        font-size: 18px;
    }
}

/* ===================================
   打印样式
   =================================== */
@media print {
    .header,
    .mobile-toggle,
    .scroll-indicator,
    .back-top,
    .cta-section {
        display: none;
    }

    body {
        color: #000;
        background: #fff;
    }

    .hero {
        height: auto;
        page-break-after: always;
    }

    section {
        page-break-inside: avoid;
    }
}