/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: rgba(10, 10, 10, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .floating-elements {
        width: 300px;
        height: 300px;
    }
    
    .about-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-panel.active {
        flex-direction: column;
        gap: 40px;
    }
    
    .solution-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .contact-visual {
        gap: 20px;
    }
    
    .contact-map,
    .business-hours {
        padding: 25px 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .service-card {
        padding: 30px 20px;
    }
    

    
    section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
}