/* 响应式设计 */
@media (max-width: 1200px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .about-intro .container,
    .contact-section .container {
        gap: 30px;
    }
}

@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .services-grid,
    .values-grid,
    .team-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .about-intro .container {
        flex-direction: column;
    }
    
    .about-content {
        padding-right: 0;
        margin-bottom: 30px;
    }
    
    .service-category {
        flex-direction: column;
    }
    
    .service-category.reverse {
        flex-direction: column;
    }
    
    .service-image,
    .service-content {
        padding: 10px;
    }
}

@media (max-width: 768px) {
    .navbar {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 80%;
        height: calc(100vh - 80px);
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        transition: all 0.5s ease;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    }
    
    .navbar.active {
        left: 0;
    }
    
    .navbar ul {
        flex-direction: column;
    }
    
    .navbar ul li {
        margin: 15px 0;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p,
    .page-header p {
        font-size: 1rem;
    }
    
    .section-padding {
        padding: 60px 0;
    }
    
    .contact-section .container {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-about,
    .footer-links,
    .footer-contact {
        text-align: center;
    }
    
    .footer-links h3::after,
    .footer-contact h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .portfolio-filter ul {
        justify-content: flex-start;
    }
}

@media (max-width: 576px) {
    .hero {
        min-height: 500px;
    }
    
    .hero h1,
    .page-header h1 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .services-grid,
    .work-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonial-item p {
        font-size: 1rem;
    }
    
    .logo span {
        display: none;
    }
}