/* 响应式设计 */

/* 平板设备 */
@media screen and (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header .container {
        flex-direction: column;
        padding: 10px 15px;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    .nav ul {
        margin-top: 15px;
    }
    
    .nav ul li {
        margin: 0 15px;
    }
    
    .banner-content h1 {
        font-size: 2rem;
    }
    
    .banner-content p {
        font-size: 1rem;
    }
    
    .banner-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .lcd-content, .control-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .city-links {
        gap: 10px;
    }
    
    .city-links a {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
}

/* 手机设备 */
@media screen and (max-width: 480px) {
    .header .container {
        padding: 10px;
    }
    
    .logo img {
        height: 40px;
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav ul li {
        margin: 5px 10px;
    }
    
    .banner {
        padding: 0;
    }
    
    .banner-background {
        background-size: contain;
    }
    
    .banner-content h1 {
        font-size: 1.8rem;
    }
    
    .banner-content {
        padding: 1.5rem;
        background: rgba(0, 0, 0, 0.7);
    }
    
    .products, .lcd-section, .control-system, .contact {
        padding: 60px 0;
    }
    
    .products h2, .lcd-section h2, .control-system h2, .contact h2 {
        font-size: 2rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
    
    .product-item img {
        height: 150px;
    }
    
    .contact-form input,
    .contact-form textarea {
        padding: 12px;
    }
    
    .city-stations {
        padding: 60px 0;
    }
    
    .city-stations h2 {
        font-size: 1.6rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        text-align: center;
    }
}

/* 超小屏幕设备 */
@media screen and (max-width: 320px) {
    .container {
        padding: 0 10px;
    }
    
    .banner-content h1 {
        font-size: 1.5rem;
    }
    
    .banner {
        padding: 0;
    }
    
    .banner-content {
        padding: 1rem;
        background: rgba(0, 0, 0, 0.8);
    }
    
    .banner-content p {
        font-size: 0.9rem;
    }
    
    .products h2, .lcd-section h2, .control-system h2, .contact h2 {
        font-size: 1.8rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 10px 20px;
    }
    
    .city-links a {
        padding: 5px 10px;
        font-size: 0.8rem;
    }
    
    .footer-info {
        min-width: 100%;
    }
    
    .footer-links {
        min-width: 100%;
    }
}

/* 大屏幕优化 */
@media screen and (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}