/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content h2 {
        font-size: 40px;
    }
    
    .hero .container {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-color);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .auth-buttons {
        display: none;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .hero-content h2 {
        font-size: 32px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 40px 0;
    }
    
    .hero-content h2 {
        font-size: 28px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .btn-large {
        padding: 10px 20px;
        font-size: 16px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .services-grid,
    .demo-steps {
        grid-template-columns: 1fr;
    }
}