/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .container {
        padding: 0 30px;
    }
    
    .hero h2 {
        font-size: 2.8rem;
    }
}

@media (max-width: 992px) {
    .top-bar-content {
        justify-content: center;
        text-align: center;
    }
    
    .contact-info {
        justify-content: center;
    }
    
    .nav-center {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-lg);
        transition: all 0.3s ease;
        z-index: 1000;
        padding: 80px 20px 20px;
        overflow-y: auto;
    }
    
    .nav-center.active {
        left: 0;
    }
    
    .nav-links ul {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-links li {
        margin: 0;
    }
    
    .nav-links a {
        padding: 15px 20px;
        border-radius: 8px;
        margin: 4px 0;
        border: none;
    }
    
    .mobile-menu {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .hero-content {
        text-align: center;
        margin: 0 auto;
    }
    
    .hero h2 {
        font-size: 2.4rem;
    }
    
    .hero p {
        margin: 0 auto 30px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-animation {
        display: none;
    }
    
    .about-content,
    .contact-content {
        flex-direction: column;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .top-bar {
        padding: 12px 0;
    }
    
    .top-bar-content {
        flex-direction: column;
        gap: 12px;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 8px;
        align-items: center;
    }
    
    .quick-contact {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .hero-features {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-feature {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .services-grid,
    .ecommerce-grid,
    .hosting-grid,
    .pricing-cards,
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .service-card,
    .platform-card,
    .hosting-card,
    .pricing-card {
        padding: 25px 20px;
    }
    
    .stats {
        flex-direction: column;
        gap: 25px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .contact-buttons {
        flex-direction: column;
    }
    
    .contact-info,
    .contact-form {
        padding: 30px 25px;
    }
    
    .contact-btn {
        min-width: auto;
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .footer-contact p {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .nav-right {
        gap: 10px;
    }
    
    .language-toggle button,
    .consult-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    
    .hero h2 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .service-icon,
    .platform-icon,
    .hosting-icon {
        font-size: 2.5rem;
    }
    
    .ecommerce-grid,
    .hosting-grid,
    .pricing-cards,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .platform-card,
    .hosting-card,
    .pricing-card {
        padding: 25px 20px;
    }
    
    .contact-info,
    .contact-form {
        padding: 25px 20px;
    }
    
    .about-text h2 {
        font-size: 2rem;
    }
    
    .stat h3 {
        font-size: 2.2rem;
    }
}