/* 移动端优化样式 */

/* 基础移动端样式 */
@media (max-width: 768px) {
    /* 容器调整 */
    .container {
        padding: 0 15px;
    }
    
    /* 头部样式 */
    .header {
        padding: 40px 0;
    }
    
    .logo {
        font-size: 2rem;
        margin-bottom: 10px;
    }
    
    .subtitle {
        font-size: 1rem;
        padding: 0 20px;
    }
    
    /* 导航样式 */
    .nav {
        position: relative;
        box-shadow: 0 1px 5px rgba(0,0,0,0.1);
    }
    
    .nav-list {
        flex-wrap: wrap;
        gap: 8px;
        padding: 15px 0;
        justify-content: center;
    }
    
    .nav-list li {
        margin: 0;
    }
    
    .nav-list a {
        font-size: 0.9rem;
        padding: 6px 12px;
        margin: 2px;
    }
    
    /* 章节标题 */
    .section {
        padding: 30px 0;
        margin-bottom: 40px;
    }
    
    .section h2 {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }
    
    /* 概览卡片 */
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 30px;
    }
    
    .overview-card {
        padding: 20px;
    }
    
    .overview-card h3 {
        font-size: 1.3rem;
    }
    
    /* 时间线样式 */
    .timeline-container {
        padding: 20px 0;
    }
    
    .timeline {
        padding-left: 25px;
    }
    
    .timeline::before {
        left: 8px;
    }
    
    .timeline-item {
        margin-bottom: 25px;
    }
    
    .timeline-item::before {
        left: -18px;
        width: 10px;
        height: 10px;
    }
    
    .timeline-content {
        padding: 15px;
    }
    
    .timeline-title {
        font-size: 1.1rem;
    }
    
    /* 里程碑样式 */
    .milestones-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .milestone-card {
        padding: 20px;
    }
    
    .milestone-year {
        font-size: 1.2rem;
    }
    
    .milestone-title {
        font-size: 1.1rem;
    }
    
    /* 技术发展样式 */
    .tech-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px;
    }
    
    .tech-icon {
        margin-bottom: 15px;
    }
    
    /* 价格历史样式 */
    .price-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
    }
    
    .price-amount {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }
    
    .price-details {
        flex: none;
        width: 100%;
    }
    
    /* 新闻样式 */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-card {
        padding: 20px;
    }
    
    .news-title {
        font-size: 1.1rem;
    }
    
    /* 标签样式 */
    .tags {
        gap: 6px;
    }
    
    .tag {
        font-size: 0.8rem;
        padding: 3px 10px;
    }
    
    /* 页脚样式 */
    .footer {
        padding: 30px 0;
    }
    
    .footer p {
        font-size: 0.9rem;
        padding: 0 15px;
    }
}

/* 小屏幕设备优化 */
@media (max-width: 480px) {
    /* 容器 */
    .container {
        padding: 0 10px;
    }
    
    /* 头部 */
    .header {
        padding: 30px 0;
    }
    
    .logo {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    /* 导航 */
    .nav-list a {
        font-size: 0.85rem;
        padding: 5px 10px;
    }
    
    /* 章节标题 */
    .section h2 {
        font-size: 1.6rem;
    }
    
    /* 概览卡片 */
    .overview-card {
        padding: 15px;
    }
    
    .overview-card h3 {
        font-size: 1.2rem;
    }
    
    /* 时间线 */
    .timeline {
        padding-left: 20px;
    }
    
    .timeline::before {
        left: 5px;
    }
    
    .timeline-item::before {
        left: -15px;
        width: 8px;
        height: 8px;
    }
    
    .timeline-content {
        padding: 12px;
    }
    
    .timeline-title {
        font-size: 1rem;
    }
    
    .timeline-description {
        font-size: 0.9rem;
    }
    
    /* 里程碑 */
    .milestone-card {
        padding: 15px;
    }
    
    .milestone-year {
        font-size: 1.1rem;
    }
    
    .milestone-title {
        font-size: 1rem;
    }
    
    .milestone-description {
        font-size: 0.9rem;
    }
    
    /* 技术发展 */
    .tech-item {
        padding: 15px;
    }
    
    .tech-content h4 {
        font-size: 1rem;
    }
    
    .tech-content p {
        font-size: 0.9rem;
    }
    
    /* 价格历史 */
    .price-item {
        padding: 15px;
    }
    
    .price-amount {
        font-size: 1.3rem;
    }
    
    .price-details {
        font-size: 0.9rem;
    }
    
    /* 新闻 */
    .news-card {
        padding: 15px;
    }
    
    .news-title {
        font-size: 1rem;
    }
    
    .news-description {
        font-size: 0.9rem;
    }
    
    /* 标签 */
    .tag {
        font-size: 0.75rem;
        padding: 2px 8px;
    }
}

/* 横屏模式优化 */
@media (max-width: 768px) and (orientation: landscape) {
    .header {
        padding: 20px 0;
    }
    
    .section {
        padding: 20px 0;
    }
    
    .overview-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .milestones-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .overview-card,
    .milestone-card,
    .tech-item,
    .price-item,
    .news-card {
        transition: none;
    }
    
    .overview-card:hover,
    .milestone-card:hover,
    .tech-item:hover,
    .price-item:hover,
    .news-card:hover {
        transform: none;
    }
    
    /* 增大点击区域 */
    .nav-list a {
        padding: 8px 16px;
        margin: 4px;
    }
    
    .tag {
        padding: 6px 12px;
        margin: 4px;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .timeline-item::before {
        border-width: 2px;
    }
    
    .timeline::before {
        width: 3px;
    }
}

/* 减少动画效果（用户偏好） */
@media (prefers-reduced-motion: reduce) {
    .timeline-item,
    .fade-in {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    .overview-card,
    .milestone-card,
    .tech-item,
    .price-item,
    .news-card {
        transition: none;
    }
    
    .overview-card:hover,
    .milestone-card:hover,
    .tech-item:hover,
    .price-item:hover,
    .news-card:hover {
        transform: none;
    }
}

/* 暗色模式适配 */
@media (prefers-color-scheme: dark) {
    @media (max-width: 768px) {
        body {
            background-color: #121212;
            color: #e0e0e0;
        }
        
        .overview-card,
        .timeline-content,
        .milestone-card,
        .tech-item,
        .price-item,
        .news-card {
            background-color: #1e1e1e;
            color: #e0e0e0;
        }
        
        .nav {
            background-color: #1e1e1e;
            box-shadow: 0 1px 5px rgba(0,0,0,0.3);
        }
        
        .nav-list a {
            color: #e0e0e0;
        }
        
        .nav-list a:hover {
            color: #f7931a;
            background-color: rgba(247, 147, 26, 0.1);
        }
    }
}