/* 响应式样式 */

/* 大屏幕设备 (大于等于1200px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* 中等屏幕设备 (992px-1199px) */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    .slide-content h2 {
        font-size: 2.5rem;
    }
    
    .slide-content p {
        font-size: 1.1rem;
    }
    
    .about-content {
        gap: 30px;
    }
}

/* 平板设备 (768px-991px) */
@media (max-width: 991px) {
    .container {
        max-width: 720px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .hero-slider {
        height: 500px;
    }
    
    .slide-content h2 {
        font-size: 2.2rem;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-text,
    .about-image {
        flex: none;
        width: 100%;
    }
    
    .about-text {
        margin-bottom: 30px;
    }
    
    .products-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partner {
        flex: 0 0 calc(33.333% - 40px);
    }
    
    .contact-wrapper {
        flex-direction: column;
    }
    
    .contact-info,
    .contact-form {
        flex: none;
        width: 100%;
    }
    
    .contact-info {
        margin-bottom: 40px;
    }
    
    .site-map-column {
        flex: 0 0 calc(50% - 15px);
    }
    
    .qrcode-container {
        justify-content: center;
        flex-direction: row;
        gap: 20px;
    }
    
    .qrcode-item img {
        width: 100px;
        height: 100px;
    }
    
    .qrcode-item {
        margin-bottom: 0;
    }
}

/* 手机设备 (576px-767px) */
@media (max-width: 767px) {
    .container {
        max-width: 540px;
    }
    
    section {
        padding: 50px 0;
        margin-top: 30px;
    }
    
    .section-header {
        margin-bottom: 30px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    header .container {
        height: 70px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .main-nav {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: #fff;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .main-nav.active {
        max-height: 500px;
    }
    
    .main-nav ul {
        flex-direction: column;
        /* padding: 20px 0; */
    }
    
    .main-nav ul li {
        margin: 0;
    }
    
    .main-nav ul li a {
        padding: 12px 20px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .has-dropdown.active .dropdown {
        max-height: 500px;
    }
    
    .dropdown li a {
        padding-left: 40px !important;
    }
    
    .hero-slider {
        height: 400px;
        margin-top: 70px;
    }
    
    .slide-content h2 {
        font-size: 1.8rem;
    }
    
    .slide-content p {
        font-size: 1rem;
    }
    
    .products-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .partner {
        flex: 0 0 calc(50% - 40px);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .copyright {
        margin-bottom: 15px;
    }
    
    .footer-links a {
        margin: 0 10px;
    }
    
    .qrcode-container {
        align-items: center;
    }
    
    .qrcode-item {
        margin-bottom: 20px;
    }
    
    .qrcode-item img {
        width: 90px;
        height: 90px;
    }
}

/* 超小屏幕设备 (小于576px) */
@media (max-width: 575px) {
    .container {
        width: 100%;
        padding: 0 15px;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .hero-slider {
        height: 350px;
    }
    
    .slide-content h2 {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }
    
    .slide-content p {
        font-size: 0.9rem;
        margin-bottom: 20px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .prev-slide,
    .next-slide {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
        z-index: 100;
    }
    
    .prev-slide {
        left: 10px;
    }
    
    .next-slide {
        right: 10px;
    }
    
    .partner {
        flex: 0 0 100%;
        margin-bottom: 20px;
    }
    
    .site-map-column {
        flex: 0 0 100%;
    }
    
    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 20px;
        right: 20px;
    }
    
    .qrcode-item img {
        width: 80px;
        height: 80px;
    }
    
    .qrcode-item p {
        font-size: 0.8rem;
    }
    
    /* 订阅区域 */
    .subscribe-section .container {
        padding: 0 20px;
    }
    
    .subscribe-content {
        padding: 25px 15px;
    }
    
    .subscribe-content h2 {
        font-size: 1.8rem;
    }
    
    .subscribe-content p {
        font-size: 1rem;
        max-width: 100%;
    }
    
    .subscribe-form {
        flex-direction: column;
        max-width: 100%;
    }
    
    .subscribe-form input {
        margin-bottom: 50px;
        width: 100%;
        border-radius: 8px;
    }
    
    .subscribe-form button {
        position: absolute;
        right: 0;
        left: 0;
        bottom: 0;
        top: auto;
        width: 100%;
        border-radius: 8px;
        height: 45px;
    }
    
    .subscribe-benefits {
        gap: 10px;
        flex-direction: column;
        align-items: center;
    }
}