/* 平板设备 */
@media screen and (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-menu {
        margin-top: 1rem;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* 移动设备 */
@media screen and (max-width: 480px) {
    .nav-menu {
        flex-direction: column;
        align-items: center;
    }

    .logo a {
        font-size: 1.6rem; /* 在手机模式下放大logo文字 */
    }

    .hero {
        padding: 3rem 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .featured-categories,
    .latest-articles {
        padding: 2rem 1rem;
    }

    .category-grid {
        grid-template-columns: 1fr;
    }

    .article-grid {
        grid-template-columns: 1fr;
    }

    .cta-button {
        padding: 0.8rem 1.5rem;
    }
}

/* 大屏幕设备 */
@media screen and (min-width: 1200px) {
    .nav-container,
    .hero-content,
    .category-grid,
    .article-grid,
    .footer-content {
        max-width: 1400px;
    }
}

/* 打印样式 */
@media print {
    .header,
    .footer,
    .cta-button {
        display: none;
    }

    body {
        color: #000;
    }

    main {
        margin-top: 0;
    }

    a {
        text-decoration: none;
        color: #000;
    }
}