/* 响应式设计 - 移动端适配 */

@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .guide-card {
        flex-direction: column;
    }
    
    .guide-image {
        min-width: 100%;
        height: 300px;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .hero-content h2 {
        font-size: 1.5rem;
    }
    
    .features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .versions-grid {
        grid-template-columns: 1fr;
    }
    
    .download-options {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: rgba(26, 26, 46, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: 0 10px 10px rgba(0, 0, 0, 0.2);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 80%;
        margin-bottom: 15px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .guides-tabs, .gallery-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn, .filter-btn {
        width: 80%;
        text-align: center;
    }
    
    .download-links {
        flex-direction: row;
    }
}