/* 响应式设计 - 平板设备 (768px - 1024px) */
@media screen and (max-width: 1024px) {
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .intro-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .mission-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

/* 响应式设计 - 移动设备 (小于768px) */
@media screen and (max-width: 768px) {
    .language-switcher {
        text-align: center;
    }
    
    .header .container {
        flex-direction: column;
        padding: 15px;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    .navbar {
        width: 100%;
        justify-content: space-between;
    }
    
    .nav-menu {
        position: fixed;
        top: 120px;
        left: -100%;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transition: left 0.3s ease;
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        height: 500px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .btn {
        display: block;
        width: 100%;
        margin-bottom: 15px;
        margin-right: 0;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .section-header p {
        font-size: 16px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .locations-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
    }
    
    .process-steps::before {
        left: 20px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 18px;
        margin-right: 20px;
    }
    
    .business-service {
        padding: 25px;
    }
    
    .contact-form-container {
        padding: 25px;
    }
}

/* 响应式设计 - 小移动设备 (小于480px) */
@media screen and (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    .section-header h2 {
        font-size: 24px;
    }
    
    .service-card, 
    .location-card,
    .product-card {
        padding: 20px;
    }
    
    .mission-values {
        grid-template-columns: 1fr;
    }
    
    .language-tabs {
        flex-wrap: wrap;
    }
    
    .language-tab {
        padding: 10px 15px;
        font-size: 14px;
    }
}