/* 响应式设计 - 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .hero-content,
    .tech-content,
    .about-content,
    .contact-content {
        gap: 40px;
    }
    
    .nav-menu {
        gap: 20px;
    }
    
    .data-card:nth-child(1),
    .data-card:nth-child(2),
    .data-card:nth-child(3) {
        transform: none;
    }
    
    .stats {
        gap: 30px;
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 响应式设计 - 平板竖屏与手机横屏 (576px - 768px) */
@media (max-width: 768px) {
    .navbar {
        padding: 12px 0;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        flex-direction: column;
        z-index: 1000;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-section {
        padding: 130px 0 80px;
    }
    
    .hero-content {
        flex-direction: column;
        gap: 50px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn-large {
        width: 100%;
    }
    
    .tech-content,
    .about-content,
    .contact-content {
        flex-direction: column;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .future-roadmap::before {
        left: 90px;
    }
    
    .roadmap-date {
        width: 80px;
    }
    
    .team-illustration {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .footer-content,
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .footer-column {
        text-align: center;
    }
    
    .footer-legal {
        justify-content: center;
    }
}

/* 响应式设计 - 手机竖屏 (320px - 576px) */
@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .data-visualization {
        max-width: 100%;
    }
    
    .data-card {
        padding: 15px;
    }
    
    .data-value {
        font-size: 2.5rem;
    }
    
    .future-roadmap::before {
        left: 25px;
    }
    
    .roadmap-item {
        flex-direction: column;
    }
    
    .roadmap-date {
        width: auto;
        margin-bottom: 10px;
        font-size: 1.1rem;
    }
    
    .roadmap-content {
        margin-left: 0;
    }
    
    .roadmap-content::before {
        left: 50%;
        top: -20px;
        transform: translateX(-50%);
    }
    
    .stats {
        flex-direction: column;
        gap: 25px;
    }
    
    .team-illustration {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 25px;
    }
    
    .dashboard-content {
        padding: 20px;
    }
    
    .chart-container {
        gap: 10px;
    }
    
    .metrics {
        flex-direction: column;
        gap: 20px;
    }
}

/* 响应式设计 - 小手机 (320px - 375px) */
@media (max-width: 375px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .service-card,
    .contact-form {
        padding: 20px;
    }
    
    .footer-column {
        min-width: 100%;
    }
}