/* 
 * 迪瑞机电官网 - 响应式样式
 */

/* ===== 平板设备 (768px - 1024px) ===== */
@media screen and (max-width: 1024px) {
    .navbar-nav {
        gap: 20px;
    }
    
    .hero-content h1 {
        font-size: 30px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .advantage-flow {
        font-size: 14px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .product-detail-header {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 移动设备 (max-width: 768px) ===== */
@media screen and (max-width: 768px) {
    /* 导航栏 */
    .navbar-logo img {
        height: 32px;
        max-width: 130px;
    }
    
    .navbar-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background-color: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .navbar-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .navbar-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        width: 100%;
    }
    
    .nav-item {
        width: 100%;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .nav-item > a {
        padding: 15px 0;
        width: 100%;
    }
    
    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        padding-left: 20px;
        display: none;
    }
    
    .has-dropdown.active .dropdown-menu {
        display: block;
    }
    
    .navbar-cta {
        display: none;
    }
    
    .navbar-toggle {
        display: flex;
    }
    
    /* Hero Banner */
    .hero-banner {
        padding: 100px 0 60px;
        min-height: auto;
    }
    
    .hero-content h1 {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-advantage {
        padding: 20px 15px;
    }
    
    .advantage-badge {
        font-size: 16px;
        flex-direction: column;
        text-align: center;
    }
    
    .advantage-flow {
        flex-direction: column;
        gap: 10px;
        font-size: 14px;
    }
    
    .advantage-compare {
        flex-direction: column;
        text-align: center;
        font-size: 14px;
    }
    
    .compare-highlight {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary {
        width: 100%;
    }
    
    /* 通用标题 */
    h2 {
        font-size: 24px !important;
    }
    
    /* 痛点区域 */
    .pain-points {
        padding: 50px 0;
    }
    
    .pain-grid {
        grid-template-columns: 1fr;
    }
    
    /* 产品区域 */
    .products {
        padding: 50px 0;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-buttons {
        flex-direction: column;
    }
    
    /* 为什么选择迪瑞 */
    .why-choose {
        padding: 50px 0;
    }
    
    .advantage-section {
        padding: 25px 20px;
    }
    
    .advantage-section h3 {
        font-size: 20px;
    }
    
    .delivery-compare {
        overflow-x: auto;
    }
    
    .delivery-compare table {
        min-width: 500px;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .other-advantages {
        grid-template-columns: 1fr;
    }
    
    /* 工程案例 */
    .cases {
        padding: 50px 0;
    }
    
    .cases-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    /* FAQ */
    .faq {
        padding: 50px 0;
    }
    
    .faq-item h3 {
        font-size: 15px;
        padding: 15px 20px;
    }
    
    .faq-answer {
        padding: 0 20px;
    }
    
    /* 新闻 */
    .news {
        padding: 50px 0;
    }
    
    .news-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .news-date {
        margin-bottom: 10px;
    }
    
    /* 页脚 */
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        text-align: left;
    }
    
    .footer-links {
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    
    /* 浮动按钮 */
    .float-consult {
        right: 10px;
        bottom: 80px;
    }
    
    .consult-phone {
        width: 45px;
        height: 45px;
        font-size: 20px;
    }
    
    .consult-online {
        display: none;
    }
    
    /* 页面Banner */
    .page-banner {
        padding: 100px 0 40px;
    }
    
    .page-banner h1 {
        font-size: 24px;
    }
    
    /* 产品详情 */
    .product-detail-header {
        grid-template-columns: 1fr;
    }
    
    .product-detail-features {
        grid-template-columns: 1fr;
    }
    
    .product-delivery {
        overflow-x: auto;
    }
    
    .product-delivery table {
        min-width: 300px;
    }
    
    .product-detail-buttons {
        flex-direction: column;
    }
    
    /* 联系我们 */
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 服务流程 */
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-step::after {
        display: none;
    }
}

/* ===== 小屏手机 (max-width: 480px) ===== */
@media screen and (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 20px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .hero-hotline {
        font-size: 14px;
    }
    
    .hero-hotline a {
        font-size: 18px;
    }
    
    .btn-primary {
        padding: 12px 20px;
        font-size: 15px;
    }
    
    .btn-secondary {
        padding: 10px 18px;
        font-size: 13px;
    }
    
    h2 {
        font-size: 20px !important;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .stat-item .stat-number {
        font-size: 28px;
    }
}