/* 响应式设计 */

/* 平板设备 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    /* 头部导航 */
    .nav-wrapper {
        flex-wrap: wrap;
    }

    .main-nav {
        display: none;
        width: 100%;
        order: 3;
        margin-top: 20px;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        background: #fff;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        border-radius: 5px;
        padding: 20px 0;
    }

    .main-nav li {
        margin: 0;
        width: 100%;
    }

    .main-nav a {
        display: block;
        padding: 15px 20px;
        border-bottom: 1px solid #f0f0f0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .header-actions {
        flex-wrap: wrap;
        gap: 10px;
    }

    .search-box {
        order: 2;
        width: 100%;
        margin-top: 15px;
    }

    .search-box input {
        width: calc(100% - 80px);
    }

    /* 轮播图 */
    .hero-section {
        height: 400px;
    }

    .slide {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .slide-content h1 {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .slide-content p {
        font-size: 1rem;
        margin-bottom: 20px;
    }

    .slide-image {
        margin-top: 20px;
    }

    /* 课程网格 */
    .courses-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    /* 特色服务 */
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 30px;
    }

    .feature-item {
        padding: 20px 15px;
    }

    /* 新闻网格 */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 页脚 */
    .footer-content {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 30px;
    }

    /* 区块内边距调整 */
    .courses-section,
    .features-section,
    .news-section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    /* 头部 */
    .logo {
        font-size: 18px;
    }

    .logo img {
        width: 30px;
        height: 30px;
    }

    .header-actions {
        gap: 5px;
    }

    .login-btn,
    .register-btn {
        padding: 6px 12px;
        font-size: 0.9rem;
    }

    /* 轮播图 */
    .hero-section {
        height: 350px;
    }

    .slide-content h1 {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }

    .slide-content p {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    .cta-button {
        padding: 12px 24px;
        font-size: 0.9rem;
    }

    .slider-controls button {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    .slider-dots {
        bottom: 20px;
    }

    .dot {
        width: 8px;
        height: 8px;
    }

    /* 课程卡片 */
    .courses-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .course-info {
        padding: 20px;
    }

    .course-info h3 {
        font-size: 1.3rem;
    }

    .price {
        font-size: 1.3rem;
    }

    /* 特色服务 */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 15px;
    }

    .feature-icon img {
        width: 30px;
        height: 30px;
    }

    .feature-item h3 {
        font-size: 1.3rem;
    }

    /* 新闻内容 */
    .news-content {
        padding: 20px;
    }

    .news-content h3 {
        font-size: 1.1rem;
    }

    /* 页脚 */
    .footer {
        padding: 40px 0 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
    }

    .social-links {
        margin-top: 15px;
    }

    .social-link {
        margin: 0 5px 10px;
        padding: 6px 12px;
        font-size: 0.9rem;
    }

    /* 区块内边距调整 */
    .courses-section,
    .features-section,
    .news-section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }

    .section-title::after {
        width: 60px;
        height: 2px;
    }
}

/* 超小屏幕设备 */
@media (max-width: 320px) {
    .container {
        padding: 0 10px;
    }

    .slide-content h1 {
        font-size: 1.3rem;
    }

    .slide-content p {
        font-size: 0.8rem;
    }

    .cta-button {
        padding: 10px 20px;
        font-size: 0.8rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .course-info,
    .news-content {
        padding: 15px;
    }

    .footer {
        padding: 30px 0 10px;
    }
}

/* 高分辨率屏幕优化 */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }

    .slide-content h1 {
        font-size: 3.5rem;
    }

    .slide-content p {
        font-size: 1.4rem;
    }

    .section-title {
        font-size: 3rem;
    }
}

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

    .main-content {
        margin-top: 0;
    }

    .hero-section {
        height: auto;
        background: none;
    }

    .slide-content {
        color: #000;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    .section-title {
        color: #000;
        page-break-after: avoid;
    }

    .course-card,
    .news-item {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}