/* 响应式扩展样式 */

/* 超大屏幕 */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
    
    .hero-text h1 {
        font-size: 56px;
    }
    
    .section-header h2 {
        font-size: 40px;
    }
}

/* 大屏幕 */
@media (min-width: 1200px) and (max-width: 1399px) {
    .hero-text h1 {
        font-size: 44px;
    }
    
    .doctors-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .news-item.featured {
        grid-column: span 1;
        grid-row: span 2;
    }
}

/* 中等屏幕 */
@media (min-width: 992px) and (max-width: 1199px) {
    .main-nav .container {
        padding: 0 10px;
    }
    
    .nav-menu a {
        padding: 15px 12px;
        font-size: 14px;
    }
    
    .search-box {
        max-width: 400px;
    }
    
    .hero-text h1 {
        font-size: 40px;
    }
    
    .quick-nav-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .departments-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .doctors-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-item.featured {
        grid-column: span 2;
    }
}

/* 小屏幕平板 */
@media (min-width: 768px) and (max-width: 991px) {
    .top-bar .container {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .main-nav .container {
        height: auto;
        flex-wrap: wrap;
        padding: 10px;
    }
    
    .nav-left {
        order: 1;
        flex: 1;
    }
    
    .nav-right {
        order: 3;
        flex: 1;
    }
    
    .nav-center {
        order: 2;
        flex: 1 1 100%;
        margin: 15px 0;
    }
    
    .nav-menu ul {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-menu a {
        padding: 10px 15px;
        font-size: 13px;
    }
    
    .hero-content .container {
        gap: 30px;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-image {
        max-width: 70%;
    }
    
    .quick-nav-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .departments-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .doctors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-item.featured {
        grid-column: span 2;
    }
    
    .qa-item {
        padding: 20px;
    }
    
    .question-stats {
        gap: 15px;
    }
    
    .footer-sections {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 大手机屏幕 */
@media (min-width: 576px) and (max-width: 767px) {
    .top-bar {
        display: none;
    }
    
    .main-nav .container {
        height: 60px;
        justify-content: space-between;
    }
    
    .nav-center, .nav-right {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-section {
        min-height: 400px;
    }
    
    .hero-content {
        padding: 50px 0;
    }
    
    .hero-text h1 {
        font-size: 28px;
    }
    
    .hero-text p {
        font-size: 16px;
    }
    
    .hero-actions {
        gap: 10px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .quick-nav-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .quick-nav-item {
        padding: 25px 15px;
    }
    
    .nav-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .quick-nav-item h3 {
        font-size: 16px;
    }
    
    .departments-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .department-item {
        padding: 20px;
    }
    
    .doctors-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .doctor-card {
        padding: 20px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-item.featured {
        grid-column: span 1;
    }
    
    .qa-item {
        padding: 20px;
        flex-direction: column;
    }
    
    .question-stats {
        margin-left: 0;
        margin-top: 15px;
        justify-content: flex-start;
    }
}

/* 小手机屏幕 */
@media (max-width: 575px) {
    .top-bar {
        display: none;
    }
    
    .main-nav .container {
        height: 60px;
        padding: 0 10px;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .nav-center, .nav-right {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-section {
        min-height: 350px;
    }
    
    .hero-content {
        padding: 40px 0;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 24px;
        margin-bottom: 15px;
    }
    
    .hero-text p {
        font-size: 14px;
        margin-bottom: 25px;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    
    .hero-actions .btn {
        padding: 12px 24px;
        font-size: 14px;
        width: 200px;
    }
    
    .hero-image {
        display: none;
    }
    
    .section-header {
        margin-bottom: 30px;
    }
    
    .section-header h2 {
        font-size: 24px;
        margin-bottom: 10px;
    }
    
    .section-header p {
        font-size: 14px;
    }
    
    .quick-nav-section {
        padding: 40px 0;
    }
    
    .quick-nav-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .quick-nav-item {
        padding: 20px 15px;
    }
    
    .nav-icon {
        width: 45px;
        height: 45px;
        font-size: 18px;
        margin-bottom: 10px;
    }
    
    .quick-nav-item h3 {
        font-size: 16px;
        margin-bottom: 5px;
    }
    
    .quick-nav-item p {
        font-size: 13px;
    }
    
    .departments-section, .featured-doctors-section, .latest-news-section, .hot-qa-section, .popular-search-section {
        padding: 40px 0;
    }
    
    .departments-grid {
        gap: 15px;
    }
    
    .department-item {
        padding: 15px;
    }
    
    .dept-icon {
        width: 40px;
        height: 40px;
        font-size: 16px;
        margin-bottom: 10px;
    }
    
    .department-item h3 {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .sub-departments span {
        font-size: 11px;
        padding: 3px 6px;
    }
    
    .doctors-grid {
        gap: 15px;
    }
    
    .doctor-card {
        padding: 15px;
    }
    
    .doctor-avatar img, .avatar-placeholder {
        width: 60px;
        height: 60px;
    }
    
    .avatar-placeholder {
        font-size: 24px;
    }
    
    .doctor-info h3 {
        font-size: 16px;
    }
    
    .doctor-actions {
        flex-direction: column;
        gap: 8px;
    }
    
    .doctor-actions .btn {
        width: 100%;
    }
    
    .news-grid {
        gap: 15px;
    }
    
    .news-item {
        margin-bottom: 0;
    }
    
    .news-image {
        height: 150px;
    }
    
    .news-content {
        padding: 15px;
    }
    
    .news-content h3 {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .news-summary {
        font-size: 13px;
        margin-bottom: 10px;
    }
    
    .news-meta {
        flex-direction: column;
        gap: 5px;
        align-items: flex-start;
    }
    
    .qa-item {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    .question-content h3 {
        font-size: 16px;
    }
    
    .question-preview {
        font-size: 13px;
    }
    
    .question-meta {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
    
    .question-stats {
        margin-top: 15px;
        gap: 10px;
    }
    
    .stat-number {
        font-size: 16px;
    }
    
    .qa-actions {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    
    .qa-actions .btn {
        width: 200px;
    }
    
    .search-tags {
        gap: 8px;
    }
    
    .search-tag {
        padding: 6px 10px;
        font-size: 13px;
    }
    
    .search-count {
        font-size: 10px;
    }
    
    .footer-content {
        padding: 40px 0 20px;
    }
    
    .footer-sections {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .footer-section h3 {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .footer-description {
        font-size: 14px;
    }
    
    .contact-item {
        font-size: 13px;
    }
    
    .footer-links a {
        font-size: 13px;
    }
    
    .social-links {
        justify-content: center;
        margin-bottom: 20px;
    }
    
    .social-link {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .stat-item {
        padding: 10px;
    }
    
    .stat-number {
        font-size: 16px;
    }
    
    .stat-label {
        font-size: 11px;
    }
    
    .footer-bottom {
        padding: 20px 0;
    }
    
    .footer-bottom-content {
        font-size: 12px;
    }
    
    .disclaimer-text {
        flex-direction: column;
        gap: 5px;
        text-align: center;
    }
    
    .online-service {
        left: 10px;
        bottom: 10px;
    }
    
    .service-btn {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    .service-panel {
        width: 250px;
    }
    
    .back-to-top {
        right: 10px;
        bottom: 10px;
        width: 45px;
        height: 45px;
    }
    
    .pagination {
        margin: 30px 0;
        gap: 3px;
    }
    
    .pagination a, .pagination span {
        padding: 6px 10px;
        font-size: 14px;
    }
    
    /* 移动端搜索建议 */
    .search-suggestions {
        font-size: 14px;
    }
    
    .suggestion-item {
        padding: 12px 15px;
    }
    
    /* 移动端下拉菜单 */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: #f8f9fa;
        margin-top: 5px;
        border-radius: 8px;
    }
    
    .dropdown-menu a {
        padding: 10px 15px;
        font-size: 13px;
    }
}

/* 超小屏幕优化 */
@media (max-width: 360px) {
    .container {
        padding: 0 8px;
    }
    
    .hero-content {
        padding: 30px 0;
    }
    
    .hero-text h1 {
        font-size: 20px;
    }
    
    .hero-actions .btn {
        width: 160px;
        padding: 10px 16px;
    }
    
    .section-header h2 {
        font-size: 20px;
    }
    
    .quick-nav-item {
        padding: 15px 10px;
    }
    
    .department-item, .doctor-card, .news-item {
        padding: 12px;
    }
    
    .qa-item {
        padding: 12px;
    }
    
    .service-panel {
        width: 220px;
    }
    
    .stats-grid {
        gap: 8px;
    }
    
    .stat-item {
        padding: 8px;
    }
}

/* 打印样式 */
@media print {
    .top-bar, .main-nav, .hero-section, .quick-nav-section, .popular-search-section, .main-footer, .back-to-top, .online-service, .mobile-menu-btn, .mobile-menu {
        display: none !important;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
    
    .section-header, .news-item, .doctor-card, .qa-item, .department-item {
        break-inside: avoid;
    }
    
    .container {
        max-width: none;
        margin: 0;
        padding: 0;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
        color: #000;
        background: #fff;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
    
    .btn {
        display: none;
    }
}

/* 横屏优化 */
@media (orientation: landscape) and (max-height: 500px) {
    .hero-section {
        min-height: 300px;
    }
    
    .hero-content {
        padding: 30px 0;
    }
    
    .hero-text h1 {
        font-size: 28px;
        margin-bottom: 10px;
    }
    
    .hero-text p {
        margin-bottom: 20px;
    }
}

/* 无障碍访问支持 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        border: 2px solid #000;
        color: #fff;
    }
    
    .btn-secondary {
        background: #fff;
        border: 2px solid #000;
        color: #000;
    }
    
    .search-form {
        border: 2px solid #000;
    }
    
    .nav-menu a:hover, .nav-menu .active a {
        background: #000;
        color: #fff;
    }
}