/* 响应式设计 */

@media (max-width: 1200px) {
    .hero-container {
        gap: 40px;
    }
    
    .hero-box-img {
        width: 450px;
    }
}

@media (max-width: 992px) {
    .hero-container {
        flex-direction: column;
        gap: 60px;
    }
    
    .hero-content {
        text-align: center;
        max-width: 100%;
    }
    
    .about-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .process-steps {
        flex-direction: column;
        gap: 40px;
    }
    
    .process-steps::before {
        top: 0;
        left: 40px;
        right: auto;
        width: 4px;
        height: 100%;
    }
    
    .hero-box-img {
        width: 400px;
    }
    
    .section-title h2 {
        font-size: 2.2rem;
    }
    
    .hero-content h2 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 90px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 90px);
        background: white;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 50px;
        transition: var(--transition);
        z-index: 999;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links a {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-content h2 {
        font-size: 2.2rem;
    }

    .hero-btns {
        justify-content: center;
    }

    .section-title h2 {
        font-size: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .hero-box-img {
        width: 300px;
    }
    
    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .services-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 150px 0 80px;
    }

    .hero-content h2 {
        font-size: 1.8rem;
    }
    
    section {
        padding: 80px 0;
    }
    
    .hero-box-img {
        width: 250px;
    }
    
    .years-badge {
        padding: 12px 18px;
        font-size: 1rem;
        top: -15px;
        right: -15px;
    }
    
    .logo-img {
        width: 40px;
        height: 40px;
    }
    
    .logo-text h1 {
        font-size: 1.2rem;
    }
    
    .lang-btn span {
        display: none;
    }
    
    .lang-options {
        width: 120px;
    }
}