/* 响应式设计 */

/* 平板设备 (最大宽度 1024px) */
@media screen and (max-width: 1024px) {
    .container {
        width: 95%;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .nav-items {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 20px;
    }

    .value-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 20px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

/* 小平板/大手机 (最大宽度 768px) */
@media screen and (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
    }

    .logo {
        order: 1;
        margin-right: auto;
    }

    .main-nav {
        order: 3;
        width: 100%;
        margin-top: 1rem;
        display: none;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .main-nav ul li {
        margin: 0.5rem 0;
    }
    
    /* 移动端下拉菜单样式 */
    .dropdown {
        width: 100%;
    }
    
    .dropdown-content {
        position: static;
        display: none;
        box-shadow: none;
        background-color: #f0f0f0;
        padding: 10px 0;
    }
    
    .dropdown-content a {
        padding: 10px 20px;
        display: block;
        width: 100%;
    }
    
    .main-nav.active .dropdown-content {
        display: block;
    }

    .mobile-menu-toggle {
        display: flex;
        order: 2;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

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

    .hero-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .btn {
        margin: 5px 0;
        width: 80%;
    }

    .nav-items {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .nav-item {
        padding: 20px 15px;
    }

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

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

    .value-item {
        padding: 30px 20px;
    }

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

    .contact-float {
        flex-direction: row;
        right: 15px;
        bottom: 15px;
        border-radius: 30px;
    }

    .contact-item {
        padding: 12px 15px;
    }

    .contact-item img {
        display: none;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

/* 手机设备 (最大宽度 480px) */
@media screen and (max-width: 480px) {
    .container {
        width: 100%;
        padding: 0 10px;
    }

    .hero-section {
        padding: 100px 0 60px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

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

    .nav-items {
        grid-template-columns: 1fr;
        padding: 0 10px;
    }

    .section-title {
        font-size: 1.6rem;
        padding: 0 10px;
    }

    .value-item {
        padding: 25px 15px;
    }

    .value-item h3 {
        font-size: 1.2rem;
    }

    .product-card img {
        height: 180px;
    }

    .product-info {
        padding: 20px;
    }

    .product-info h3 {
        font-size: 1.2rem;
    }

    .contact-float {
        flex-direction: column;
        border-radius: 50px;
        bottom: 20px;
        right: 15px;
    }

    .contact-item {
        padding: 15px;
        justify-content: center;
    }

    .contact-item span {
        display: none;
    }

    .contact-item img {
        display: block;
        margin-right: 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        padding: 0 10px;
    }

    .btn {
        width: 100%;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 12px;
    }
}

/* 超小屏幕 (最大宽度 360px) */
@media screen and (max-width: 360px) {
    .hero-content h1 {
        font-size: 1.6rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .nav-item {
        padding: 15px 10px;
    }

    .nav-item h3 {
        font-size: 1rem;
    }

    .value-item {
        padding: 20px 10px;
    }
}

/* 高分辨率屏幕优化 */
@media screen and (min-width: 1440px) {
    .container {
        max-width: 1300px;
    }

    .hero-content h1 {
        font-size: 3.5rem;
    }

    .section-title {
        font-size: 2.5rem;
    }
}

/* 横屏手机设备 */
@media screen and (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        padding: 80px 0 40px;
    }

    .hero-content h1 {
        font-size: 1.6rem;
    }

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

/* 关于页面响应式优化 */
@media screen and (max-width: 768px) {
    .intro-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .intro-content {
        display: flex;
        flex-direction: column;
    }
}

@media screen and (max-width: 480px) {
    .intro-stats {
        grid-template-columns: 1fr;
    }
}

/* 解决方案页面响应式优化 */
@media screen and (max-width: 768px) {
    .pain-point {
        grid-template-columns: 1fr;
    }
    
    .problem, .solution {
        padding: 15px;
    }
    
    .case-results {
        flex-direction: column;
        gap: 10px;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-card {
        padding: 30px 20px;
    }
    
    .solution-features .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-item {
        padding: 30px 20px;
    }
    
    .solution-overview .content-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-overview .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .core-features .features-grid {
        grid-template-columns: 1fr;
    }
    
    .use-cases .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .problems-solved .problems-grid {
        grid-template-columns: 1fr;
    }
    
    .hardware-package .hardware-grid {
        grid-template-columns: 1fr;
    }
    
    .customer-cases .case-item {
        grid-template-columns: 1fr;
    }
    
    .support-offering .support-grid {
        grid-template-columns: 1fr;
    }
    
    .payment-methods .methods-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .core-advantages .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .integration-process .process-steps {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .security-assurance .security-grid {
        grid-template-columns: 1fr;
    }
    
    .management-levels .levels-grid {
        grid-template-columns: 1fr;
    }
    
    .data-sync .sync-features {
        grid-template-columns: 1fr;
    }
    
    .system-advantages .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .implementation-plan .plan-grid {
        grid-template-columns: 1fr;
    }
    
    .cost-effective-package .package-options {
        grid-template-columns: 1fr;
    }
    
    .hardware-recommendation .hardware-grid {
        grid-template-columns: 1fr;
    }
    
    .overview-actions .btn {
        display: block;
        margin: 10px auto;
        width: 80%;
        max-width: 250px;
    }
}

@media screen and (max-width: 480px) {
    .solution-card {
        padding: 20px 15px;
    }
    
    .feature-item {
        padding: 20px 15px;
    }
    
    .use-case-item {
        padding: 20px 15px;
    }
    
    .hardware-item {
        padding: 15px;
    }
    
    .case-item {
        padding: 20px;
        gap: 20px;
    }
    
    .case-stats {
        grid-template-columns: 1fr;
    }
    
    .stat {
        padding: 15px;
    }
    
    .package-card {
        padding: 20px 15px;
    }
    
    .overview-actions .btn {
        width: 90%;
    }
}

/* 渠道合作页面响应式优化 */
@media screen and (max-width: 768px) {
    .type-card.featured {
        transform: scale(1);
    }
}

/* 服务支持页面响应式优化 */
@media screen and (max-width: 768px) {
    .support-content {
        grid-template-columns: 1fr;
    }
    
    .feature {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

/* 确保内容不会被固定头部遮挡 */
body {
    padding-top: 80px; /* 头部高度 */
}

@media screen and (max-width: 768px) {
    body {
        padding-top: 120px; /* 移动端头部高度可能更大 */
    }
    
    .main-nav.active {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        padding: 20px 0;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    }
}

/* 首页特色产品响应式设计 */
@media screen and (max-width: 768px) {
    .featured-products .content-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }
    
    .featured-products .content-grid .grid-item {
        padding: 20px;
    }
    
    .featured-products .content-grid .grid-item > img {
        height: 160px;
    }
}

@media screen and (max-width: 480px) {
    .featured-products .content-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .featured-products .content-grid .grid-item > img {
        height: 180px;
    }
}