/* 平板设备样式 (768px 及以下) */
@media screen and (max-width: 768px) {
    .nav-container {
        padding: 0 15px;
        height: 70px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 50px;
        gap: 30px;
        transition: left 0.3s ease;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .language-switcher {
        margin-left: 0;
        margin-top: 20px;
    }
    
    .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-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .service-item {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-bottom: 60px;
    }
    
    .service-item.reverse {
        direction: ltr;
    }
    
    .about-intro {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 手机设备样式 (480px 及以下) */
@media screen and (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .company-name {
        font-size: 1.2rem;
    }
    
    .hero {
        height: 70vh;
        margin-top: 70px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .page-header {
        padding: 100px 0 60px;
    }
    
    .page-header h1 {
        font-size: 2.2rem;
    }
    
    .services-preview,
    .about-preview,
    .services-detail,
    .about-content,
    .contact-content {
        padding: 50px 0;
    }
    
    .service-card {
        padding: 30px 20px;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
    
    .map-placeholder {
        padding: 40px 20px;
    }
    
    .cta-section h2 {
        font-size: 2rem;
    }
    
    .footer {
        padding: 40px 0 20px;
    }
}

/* 小手机设备样式 (360px 及以下) */
@media screen and (max-width: 360px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .cta-button,
    .secondary-button {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .service-examples {
        grid-template-columns: 1fr;
    }
    
    .values-grid,
    .advantages-grid,
    .info-grid {
        grid-template-columns: 1fr;
    }
}