/* ===== 响应式设计 - 所有设备适配 ===== */

/* 平板设备 (768px - 1024px) */
@media screen and (min-width: 768px) and (max-width: 1024px) {
    .container {
        max-width: 95%;
        padding: 0 20px;
    }
    
    .product-list {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
    
    .product-item img {
        height: 180px;
    }
    
    .product-detail {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
        padding: 25px;
    }
    
    .detail-image img {
        max-height: 400px;
    }
    
    .banner {
        padding: 40px 0;
    }
    
    .banner h2 {
        font-size: 30px;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    .nav ul li a {
        padding: 12px 18px;
        font-size: 15px;
    }
}

/* 手机设备 (小于768px) */
@media screen and (max-width: 767px) {
    .container {
        max-width: 100%;
        padding: 0 12px;
    }
    
    /* 移动端头部优化 */
    .header {
        padding: 10px 0;
        position: relative;
    }
    
    .header .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
    }
    
    .logo {
        float: none;
        flex: 1;
    }
    
    .header h1 {
        font-size: 18px;
    }
    
    .header h1 a {
        display: inline-block;
    }
    
    /* 汉堡菜单按钮 */
    .menu-toggle {
        display: block !important;
        background: none;
        border: 2px solid white;
        border-radius: 4px;
        color: white;
        padding: 8px 12px;
        cursor: pointer;
        font-size: 18px;
        order: 2;
    }
    
    .menu-toggle:hover {
        background: rgba(255, 255, 255, 0.2);
    }
    
    .header-right {
        float: none;
        width: 100%;
        margin-top: 10px;
        display: none;
        order: 3;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 8px;
        padding: 10px;
    }
    
    .header-right.active {
        display: block;
    }
    
    .header-right a {
        display: block;
        margin: 5px 0;
        padding: 8px 12px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        font-size: 14px;
    }
    
    .header-right a:last-child {
        border-bottom: none;
    }
    
    /* 移动端导航 */
    .nav {
        padding: 0;
        overflow: hidden;
    }
    
    .nav .container {
        padding: 0;
    }
    
    .nav ul {
        display: none;
        background: white;
        border-top: 1px solid #e0e0e0;
        width: 100%;
    }
    
    .nav ul.active {
        display: block;
    }
    
    .nav ul li {
        display: block;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .nav ul li a {
        padding: 12px 20px;
        font-size: 14px;
        display: block;
    }
    
    .nav ul li a:hover {
        background: #f5f5f5;
        color: #667eea;
    }
    
    /* 移动端横幅 */
    .banner {
        padding: 30px 15px;
    }
    
    .banner h2 {
        font-size: 22px;
        margin-bottom: 8px;
    }
    
    .banner p {
        font-size: 14px;
    }
    
    /* 移动端产品列表 */
    .product-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .product-item {
        padding: 10px;
        border-radius: 6px;
    }
    
    .product-item img {
        height: 140px;
    }
    
    .product-item h4 {
        font-size: 13px;
        margin: 8px 0;
    }
    
    .product-item .price {
        font-size: 16px;
    }
    
    .product-item .original-price {
        font-size: 12px;
    }
    
    .product-item .stock {
        font-size: 12px;
    }
    
    /* 移动端产品详情 */
    .product-detail {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 15px;
        margin: 0 -12px;
        border-radius: 0;
    }
    
    .detail-image {
        text-align: center;
    }
    
    .detail-image img {
        max-height: 300px;
        width: auto;
    }
    
    .detail-info h2 {
        font-size: 20px;
        margin-bottom: 10px;
    }
    
    .detail-info .price {
        font-size: 24px;
        margin: 10px 0;
    }
    
    .detail-info .original-price {
        font-size: 16px;
    }
    
    .detail-info .description {
        font-size: 14px;
        margin: 15px 0;
    }
    
    .buy-section {
        margin-top: 20px;
        padding-top: 15px;
    }
    
    .buy-section label {
        font-size: 14px;
    }
    
    .buy-section input[type="text"] {
        width: 60px;
        padding: 6px 10px;
    }
    
    .btn-primary {
        padding: 10px 20px;
        font-size: 14px;
        width: 100%;
        margin-top: 10px;
    }
    
    /* 移动端登录/注册 */
    .login-container {
        padding: 20px;
    }
    
    .login-box {
        width: 100%;
        padding: 25px 20px;
        border-radius: 8px;
    }
    
    .login-box h1 {
        font-size: 20px;
    }
    
    .login-box h2 {
        font-size: 16px;
        margin-bottom: 20px;
    }
    
    .form-control {
        padding: 8px 10px;
        font-size: 14px;
    }
    
    /* 移动端过滤器 */
    .filter {
        flex-direction: column;
        gap: 10px;
    }
    
    .search-box {
        width: 100%;
    }
    
    .search-box input[type="text"] {
        width: 70%;
        padding: 8px 12px;
    }
    
    .search-box input[type="submit"] {
        width: 28%;
        padding: 8px 12px;
    }
    
    .category-filter {
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        padding: 5px 0;
    }
    
    .category-filter a {
        display: inline-block;
        padding: 6px 15px;
        font-size: 13px;
        margin: 0 4px;
    }
    
    /* 移动端页脚 */
    .footer {
        padding: 20px 0;
        font-size: 13px;
    }
    
    .footer p {
        margin: 3px 0;
    }
    
    /* 移动端购物车 */
    .cart-item {
        flex-direction: column;
        align-items: stretch !important;
        padding: 15px;
    }
    
    .cart-item img {
        width: 80px;
        height: 80px;
        margin: 0 auto 10px;
    }
    
    .cart-item-info {
        flex: 1;
        margin-left: 0 !important;
        text-align: center;
    }
    
    .cart-item-actions {
        display: flex;
        justify-content: center;
        margin-top: 10px;
        gap: 10px;
    }
    
    .cart-summary {
        padding: 15px;
    }
    
    .cart-summary .total {
        font-size: 18px;
    }
}

/* 超小手机 (小于480px) */
@media screen and (max-width: 480px) {
    .product-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .product-item {
        padding: 8px;
    }
    
    .product-item img {
        height: 110px;
    }
    
    .product-item h4 {
        font-size: 12px;
    }
    
    .product-item .price {
        font-size: 14px;
    }
    
    .banner h2 {
        font-size: 18px;
    }
    
    .banner p {
        font-size: 12px;
    }
    
    .header h1 {
        font-size: 16px;
    }
    
    .menu-toggle {
        padding: 6px 10px;
        font-size: 16px;
    }
    
    .section h3 {
        font-size: 18px;
    }
    
    .detail-info h2 {
        font-size: 18px;
    }
    
    .detail-info .price {
        font-size: 20px;
    }
}

/* 横屏手机优化 */
@media screen and (max-height: 500px) and (orientation: landscape) {
    .banner {
        padding: 20px 0;
    }
    
    .banner h2 {
        font-size: 20px;
    }
    
    .product-item img {
        height: 120px;
    }
    
    .login-container {
        min-height: auto;
        padding: 30px 20px;
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .product-item:hover {
        transform: none;
    }
    
    .btn-primary:hover {
        opacity: 1;
    }
    
    .nav ul li a:hover {
        background: transparent;
        color: #333;
    }
    
    .nav ul li a:active {
        background: #f5f5f5;
    }
}

/* 大屏电视 (大于1400px) */
@media screen and (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
    
    .product-list {
        grid-template-columns: repeat(5, 1fr);
        gap: 25px;
    }
}

/* 打印样式 */
@media print {
    .header, .nav, .banner, .footer {
        display: none;
    }
    
    .container {
        max-width: 100%;
    }
    
    .product-detail {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .btn-primary {
        display: none;
    }
}