@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }

    .header-content {
        padding: 12px 0;
    }

    .search-box input {
        width: 180px;
        font-size: 13px;
    }

    .main-nav .nav-list {
        gap: 24px;
    }

    .masonry-grid {
        column-count: 3;
    }
}

@media (max-width: 992px) {
    .main-nav {
        display: none !important;
    }

    .search-box {
        display: none !important;
    }

    .mobile-menu-toggle {
        display: block !important;
    }

    .mobile-nav.active {
        display: block !important;
    }

    .container {
        max-width: 100%;
        padding: 0 18px;
    }

    .logo span {
        font-size: 20px;
    }

    .logo i {
        font-size: 24px;
    }

    .header-content {
        padding: 12px 0;
    }

    .page-hero h1 {
        font-size: 30px;
    }

    .page-hero p {
        font-size: 16px;
    }

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

    .toc-sidebar {
        display: none;
    }

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

    .nav-prev-next {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .nav-article:last-child {
        text-align: left !important;
    }

    .tag-cloud-item.size-xl {
        font-size: 20px;
    }

    .sub-categories {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .site-header {
        position: relative;
    }

    .logo {
        font-size: 20px;
    }

    .logo span {
        font-size: 18px;
    }

    .logo i {
        font-size: 22px;
    }

    .mobile-menu-toggle {
        font-size: 22px;
        padding: 6px;
    }

    .main-content {
        padding: 20px 0;
    }

    .page-hero {
        padding: 45px 15px 35px;
        border-radius: var(--radius-md);
    }

    .page-hero h1 {
        font-size: 26px;
    }

    .page-hero p {
        font-size: 14px;
    }

    .masonry-grid {
        column-count: 2;
        column-gap: 16px;
    }

    .article-card {
        margin-bottom: 16px;
    }

    .card-image {
        height: 170px;
    }

    .card-content {
        padding: 16px;
    }

    .card-title {
        font-size: 16px;
    }

    .card-excerpt {
        -webkit-line-clamp: 2;
        font-size: 13px;
    }

    .card-meta {
        margin-bottom: 10px;
    }

    .category-tag {
        font-size: 12px;
        padding: 3px 10px;
    }

    .load-more-btn {
        padding: 12px 36px;
        font-size: 15px;
    }

    .breadcrumb {
        font-size: 13px;
        padding: 12px 16px;
    }

    .article-body {
        padding: 24px;
    }

    .article-title {
        font-size: 24px;
    }

    .article-info-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .social-share {
        flex-wrap: wrap;
    }

    .section-title {
        font-size: 19px;
    }

    .related-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .related-card {
        display: flex;
        align-items: center;
    }

    .related-image {
        width: 120px;
        height: 90px;
        flex-shrink: 0;
    }

    .related-content {
        padding: 12px;
    }

    .category-header {
        padding: 35px 20px;
        border-radius: var(--radius-md);
    }

    .category-header h1 {
        font-size: 24px;
    }

    .category-header p {
        font-size: 14px;
    }

    .tag-cloud-container {
        padding: 28px 18px;
    }

    .tag-cloud-title {
        font-size: 20px;
    }

    .tag-cloud {
        gap: 10px;
    }

    .tag-cloud-item.size-xl {
        font-size: 18px;
        padding: 9px 20px;
    }

    .site-footer {
        padding: 25px 0;
        margin-top: 40px;
    }

    .site-footer p {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }

    .logo span {
        font-size: 16px;
    }

    .logo i {
        font-size: 20px;
    }

    .page-hero {
        padding: 35px 12px 28px;
    }

    .page-hero h1 {
        font-size: 22px;
    }

    .page-hero p {
        font-size: 13px;
    }

    .masonry-grid {
        column-count: 1;
        column-gap: 0;
    }

    .article-card {
        margin-bottom: 16px;
        border-radius: var(--radius-sm);
    }

    .card-image {
        height: 180px;
    }

    .card-content {
        padding: 14px;
    }

    .card-title {
        font-size: 15px;
        -webkit-line-clamp: 2;
    }

    .card-excerpt {
        -webkit-line-clamp: 2;
        font-size: 13px;
    }

    .card-footer {
        font-size: 12px;
        padding-top: 12px;
    }

    .ai-badge,
    .top-badge,
    .recommend-badge {
        font-size: 10px;
        padding: 4px 8px;
        top: 8px;
    }

    .ai-badge { right: 8px; }
    .top-badge,
    .recommend-badge { left: 8px; }

    .load-more-wrapper {
        margin: 30px 0 20px;
    }

    .load-more-btn {
        width: 100%;
        padding: 13px 24px;
        font-size: 15px;
    }

    .breadcrumb {
        font-size: 12px;
        padding: 10px 14px;
        border-radius: var(--radius-sm);
    }

    .article-body {
        padding: 18px;
    }

    .article-title {
        font-size: 20px;
        line-height: 1.3;
    }

    .article-subtitle {
        font-size: 14px;
    }

    .article-cover {
        height: 200px;
    }

    .article-content {
        font-size: 14px;
        line-height: 1.8;
    }

    .article-content h2 {
        font-size: 20px;
    }

    .article-content h3 {
        font-size: 17px;
    }

    .article-content pre {
        font-size: 12px;
        padding: 14px;
        overflow-x: auto;
    }

    .article-content code {
        font-size: 12px;
    }

    .article-info-bar {
        font-size: 12px;
        gap: 10px;
    }

    .info-item i {
        font-size: 14px;
    }

    .share-btn {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }

    .share-label {
        font-size: 13px;
        width: 100%;
        margin-bottom: 8px;
    }

    .nav-prev-next {
        margin-top: 25px;
    }

    .nav-article {
        padding: 14px;
    }

    .nav-label {
        font-size: 12px;
    }

    .nav-article-title {
        font-size: 13px;
    }

    .section-title {
        font-size: 17px;
        margin-bottom: 18px;
    }

    .related-articles {
        margin-top: 35px;
    }

    .related-card {
        flex-direction: column;
    }

    .related-image {
        width: 100%;
        height: 140px;
    }

    .related-title {
        font-size: 14px;
    }

    .related-date {
        font-size: 12px;
    }

    .category-header {
        padding: 28px 16px;
    }

    .category-header h1 {
        font-size: 20px;
    }

    .sub-category-item {
        font-size: 13px;
        padding: 8px 16px;
    }

    .tag-cloud-container {
        padding: 22px 14px;
        border-radius: var(--radius-md);
    }

    .tag-cloud-title {
        font-size: 18px;
        margin-bottom: 22px;
    }

    .tag-cloud {
        gap: 8px;
        line-height: 1.8;
    }

    .tag-cloud-item {
        padding: 6px 14px;
    }

    .tag-cloud-item.size-xs {
        font-size: 11px;
    }

    .tag-cloud-item.size-sm {
        font-size: 12px;
    }

    .tag-cloud-item.size-md {
        font-size: 14px;
    }

    .tag-cloud-item.size-lg {
        font-size: 16px;
    }

    .tag-cloud-item.size-xl {
        font-size: 17px;
        padding: 8px 16px;
    }

    .site-footer {
        padding: 20px 0;
        margin-top: 30px;
    }

    .site-footer p:first-child {
        font-size: 14px;
    }

    .site-footer p:last-child {
        font-size: 12px;
    }

    .reading-progress {
        height: 2px;
    }
}

@media print {
    .site-header,
    .site-footer,
    .reading-progress,
    .toc-sidebar,
    .social-share,
    .nav-prev-next,
    .related-articles,
    .load-more-wrapper,
    .mobile-menu-toggle,
    .search-box {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .article-main {
        box-shadow: none;
    }

    .article-content {
        font-size: 12pt;
        line-height: 1.6;
    }

    .article-content a {
        color: #000;
        text-decoration: underline;
    }

    .article-content a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #ecf0f1;
        --secondary-color: #3498DB;
        --bg-color: #1a1a2e;
        --card-bg: #16213e;
        --text-primary: #e0e0e0;
        --text-secondary: #b0b0b0;
        --text-light: #808080;
        --border-color: #2a2a4a;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
        --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
        --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    }

    .site-header {
        background: #16213e;
    }

    .site-footer {
        background: linear-gradient(135deg, #0f0f23, #1a1a2e);
    }

    .search-box form {
        background: #1a1a2e;
    }

    .mobile-nav {
        background: #16213e;
    }

    .no-image {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }

    ::-webkit-scrollbar-track {
        background: #1a1a2e;
    }

    * {
        scrollbar-color: #3498DB #1a1a2e;
    }
}

@media (hover: none) and (pointer: coarse) {
    .article-card:hover {
        transform: none;
    }

    .related-card:hover {
        transform: none;
    }

    .nav-article:hover {
        transform: none;
    }

    .tag-cloud-item:hover {
        transform: none;
    }

    .load-more-btn:hover {
        transform: none;
    }

    .share-btn:hover {
        transform: none;
    }

    .category-tag:hover {
        transform: none;
    }

    .tag-item:hover {
        transform: none;
    }

    .sub-category-item:hover {
        transform: none;
    }
}