/* 平板设备 */
@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .intro-content {
        flex-direction: column;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 0;
        justify-content: flex-start;
    }
    
    .timeline-item:nth-child(even) {
        left: 0;
    }
    
    .timeline-year {
        left: 0;
        right: auto;
    }
}

/* 移动设备 */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: left 0.3s ease;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        margin: 15px 0;
    }
    
    .menu-btn {
        display: block;
    }
    
    .menu-btn.active .menu-btn__burger {
        transform: rotate(45deg);
    }
    
    .menu-btn.active .menu-btn__burger::before {
        transform: rotate(90deg) translate(0, 0);
    }
    
    .menu-btn.active .menu-btn__burger::after {
        opacity: 0;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
}

/* 小屏幕设备 */
@media (max-width: 576px) {
    .hero {
        height: auto;
        padding: 100px 0;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}