/* 响应式设计 */
@media (max-width: 1200px) {
    .section-container {
        width: 100%;
        padding: 0 20px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        flex-direction: column;
        align-items: center;
    }
}