/* 响应式设计 */

/* 大型设备 (笔记本电脑, 1200px 以下) */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
}

/* 中型设备 (平板电脑, 992px 以下) */
@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .hero h2 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 小型设备 (手机横屏, 768px 以下) */
@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }
    
    header .container {
        flex-direction: column;
    }
    
    .logo {
        margin-bottom: 15px;
        text-align: center;
    }
    
    nav ul {
        justify-content: center;
    }
    
    nav ul li {
        margin: 0 10px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero h2 {
        font-size: 28px;
    }
    
    .newsletter form {
        flex-direction: column;
    }
    
    .newsletter input {
        border-radius: 4px;
        margin-bottom: 10px;
    }
    
    .newsletter button {
        border-radius: 4px;
        width: 100%;
    }
    
    .article-meta {
        flex-direction: column;
        align-items: center;
        gap: 5px;
    }
    
    .prev-article,
    .next-article {
        max-width: 100%;
    }
    
    .article-navigation {
        flex-direction: column;
        gap: 15px;
    }
}

/* 超小型设备 (手机竖屏, 576px 以下) */
@media (max-width: 576px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .footer-links ul li {
        margin-bottom: 0;
    }
    
    .about-section h2:after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .about-section {
        text-align: center;
    }
    
    .values-list {
        text-align: left;
    }
    
    .hero h2 {
        font-size: 24px;
    }
    
    .hero p {
        font-size: 14px;
    }
    
    .featured-articles h2,
    .related-articles h2 {
        font-size: 24px;
    }
}