/* ===== 文章卡片 ===== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.article-card {
    padding: 28px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all var(--transition);
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.article-card .date {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.article-card h3 {
    font-size: 1.3rem;
    font-weight: 500;
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-card .summary {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 18px;
    line-height: 1.7;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-primary);
    position: relative;
}

.read-more::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-primary);
    transition: width var(--transition);
}

.read-more:hover::after {
    width: 100%;
}

.read-more .arrow {
    transition: transform var(--transition);
}

.read-more:hover .arrow {
    transform: translateX(4px);
}

/* ===== 视频卡片 ===== */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.video-card {
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform var(--transition);
}

.video-card:hover {
    transform: translateY(-4px);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16 / 10;
    background-size: cover;
    background-position: center;
    background-color: var(--color-bg-alt);
    cursor: pointer;
    overflow: hidden;
}

.video-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0);
    transition: background var(--transition);
}

.video-card:hover .video-thumb::after {
    background: rgba(0,0,0,0.25);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(255,255,255,0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    opacity: 0;
    transition: all var(--transition);
}

.video-card:hover .play-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.play-btn svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-douyin);
    fill: none;
    stroke-width: 2;
}

.video-info {
    padding: 14px 0;
}

.video-info h3 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 6px;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--color-accent);
}

/* ===== 文件卡片 ===== */
.files-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.file-card {
    display: flex;
    align-items: center;
    padding: 22px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.file-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: transparent;
}

.file-icon {
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-right: 20px;
    min-width: 40px;
    text-align: center;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-details h3 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.file-meta {
    display: flex;
    gap: 14px;
    font-size: 0.8rem;
    color: var(--color-accent);
    margin-bottom: 6px;
}

.file-details .desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.file-download {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition);
    margin-left: 16px;
}

.file-download:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}

.file-download i {
    margin-right: 6px;
}

/* ===== 模态框 ===== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 20px;
    overflow-y: auto;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.modal[aria-hidden="false"] {
    pointer-events: auto;
    opacity: 1;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
}

.modal-body {
    position: relative;
    z-index: 1;
    background: var(--color-bg);
    width: 100%;
    max-width: 760px;
    padding: 48px;
    border-radius: 6px;
    box-shadow: var(--shadow-lg);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--color-accent);
    cursor: pointer;
    transition: color var(--transition);
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-primary);
}

/* 模态框内文章样式 */
.modal-article {
    line-height: 1.9;
    color: var(--color-text-muted);
}

.modal-article h1 {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--color-text);
}

.modal-article h2 {
    font-size: 1.4rem;
    font-weight: 500;
    margin: 32px 0 14px;
    color: var(--color-text);
}

.modal-article h3 {
    font-size: 1.15rem;
    font-weight: 500;
    margin: 24px 0 10px;
    color: var(--color-text);
}

.modal-article p {
    margin-bottom: 18px;
}

.modal-article ul, .modal-article ol {
    margin-bottom: 18px;
    padding-left: 24px;
}

.modal-article li {
    margin-bottom: 6px;
}

.modal-article blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: 16px;
    margin: 18px 0;
    color: #555;
    font-style: italic;
}

.modal-article img {
    border-radius: var(--radius);
    margin: 20px 0;
}

/* ===== 加载/错误状态 ===== */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--color-accent);
}

.error-msg {
    text-align: center;
    padding: 30px;
    color: #999;
    font-style: italic;
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-accent);
}

.empty-state i {
    font-size: 2.5rem;
    margin-bottom: 16px;
    opacity: 0.3;
}

/* ===== 骨架屏 ===== */
.skeleton-card {
    height: 200px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-secondary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all 0.3s ease;
    z-index: 50;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

/* ===== 关于页面 ===== */
.about-content p {
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-links {
    margin-top: 24px;
    display: flex;
    gap: 16px;
}

.about-social {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.about-social:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}

/* ===== 搜索框 ===== */
.search-box {
    position: relative;
    max-width: 400px;
    margin-bottom: 32px;
}

.search-input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-serif);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.3s ease;
    background: var(--color-bg);
    color: var(--color-text);
}

.search-input:focus {
    border-color: var(--color-primary);
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-accent);
    pointer-events: none;
}

/* ===== 入场动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 暗色模式 ===== */
[data-theme="dark"] {
    --color-primary: #ffffff;
    --color-secondary: #111111;
    --color-accent: #999999;
    --color-bg: #111111;
    --color-bg-alt: #1a1a1a;
    --color-text: #e0e0e0;
    --color-text-muted: #bbbbbb;
    --color-border: #333333;
    --color-hover: #cccccc;
}

[data-theme="dark"] .site-header {
    background: var(--color-bg);
    border-bottom-color: var(--color-border);
}

[data-theme="dark"] .hero {
    background: var(--color-bg-alt);
}

[data-theme="dark"] .hero::before {
    background: linear-gradient(135deg, rgba(17,17,17,0.9), rgba(17,17,17,0.7));
}

[data-theme="dark"] .skeleton-card {
    background: linear-gradient(90deg, #222 25%, #333 50%, #222 75%);
    background-size: 200% 100%;
}

[data-theme="dark"] .modal-body {
    background: var(--color-bg);
}

[data-theme="dark"] .modal-article blockquote {
    color: #aaa;
}

[data-theme="dark"] .search-input {
    background: var(--color-bg-alt);
    border-color: var(--color-border);
    color: var(--color-text);
}

[data-theme="dark"] .back-to-top {
    background: var(--color-primary);
    color: var(--color-secondary);
}

[data-theme="dark"] .file-download:hover,
[data-theme="dark"] .about-social:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}

/* ===== 主题切换按钮 ===== */
.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    color: var(--color-text);
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
}

.theme-toggle:hover {
    color: var(--color-hover);
}

.theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: block;
}

@media (max-width: 768px) {
    .header-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

/* ===== Skip Link ===== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: 8px 16px;
    z-index: 200;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
}

/* ===== 联系表单 ===== */
.contact-form-wrapper {
    margin-top: 48px;
    max-width: 480px;
}

.contact-title {
    font-size: 1.3rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--color-accent);
}

.form-group input,
.form-group textarea {
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-serif);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.3s ease;
    background: var(--color-bg);
    color: var(--color-text);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: var(--color-secondary);
    font-family: var(--font-serif);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
    align-self: flex-start;
}

.submit-btn:hover {
    background: transparent;
    color: var(--color-primary);
}

.video-thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}


.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 12px;
}
.read-time { display: inline-flex; align-items: center; gap: 4px; }
.read-time i { font-size: 0.75rem; }


.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--color-primary);
    z-index: 1001;
    transition: width 0.1s ease;
}


.share-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 0;
    border-top: 1px solid var(--color-border);
    margin-top: 24px;
}
.share-label { font-size: 0.85rem; color: var(--color-accent); }
.share-btn {
    width: 36px; height: 36px; border-radius: 50%;
    border: 1px solid var(--color-border); background: var(--color-bg);
    color: var(--color-text); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s ease;
}
.share-btn:hover { background: var(--color-primary); color: var(--color-secondary); border-color: var(--color-primary); }


.zoom-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.9);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.zoom-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.zoom-img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 4px;
}
.zoom-close {
    position: absolute;
    top: 20px;
    right: 24px;
    background: none;
    border: none;
    color: #fff;
    font-size: 32px;
    cursor: pointer;
}
.modal-article img {
    cursor: zoom-in;
    border-radius: 4px;
}


.article-card.latest {
    border-left: 3px solid var(--color-primary);
}
.latest-badge {
    display: inline-block;
    padding: 2px 8px;
    background: var(--color-primary);
    color: var(--color-secondary);
    font-size: 0.7rem;
    border-radius: 2px;
    margin-bottom: 8px;
    letter-spacing: 1px;
}


/* Font Awesome fallback */
.no-icons .fas, .no-icons .fab {
    display: none;
}
[data-theme="dark"] .article-card {
    border-color: var(--color-border);
    background: var(--color-bg-alt);
}

[data-theme="dark"] .article-card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

[data-theme="dark"] .file-card {
    border-color: var(--color-border);
    background: var(--color-bg-alt);
}

[data-theme="dark"] .video-card {
    background: var(--color-bg-alt);
}

[data-theme="dark"] .about-social {
    border-color: var(--color-border);
}

[data-theme="dark"] .share-btn {
    border-color: var(--color-border);
    background: var(--color-bg-alt);
}

[data-theme="dark"] .zoom-overlay {
    background: rgba(0,0,0,0.95);
}

[data-theme="dark"] .reading-progress {
    background: var(--color-primary);
}

[data-theme="dark"] .modal-article h1,
[data-theme="dark"] .modal-article h2,
[data-theme="dark"] .modal-article h3 {
    color: var(--color-text);
}

[data-theme="dark"] .error-code {
    color: #333;
}

[data-theme="dark"] .error-page {
    background: var(--color-bg);
}

[data-theme="dark"] .error-link {
    color: var(--color-text);
    border-color: var(--color-border);
}

[data-theme="dark"] .error-link:hover {
    background: var(--color-text);
    color: var(--color-bg);
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
    background: var(--color-bg-alt);
    border-color: var(--color-border);
    color: var(--color-text);
}

[data-theme="dark"] .submit-btn {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}

[data-theme="dark"] .submit-btn:hover {
    background: transparent;
    color: var(--color-primary);
}

[data-theme="dark"] .contact-title,
[data-theme="dark"] .share-label {
    color: var(--color-text);
}

[data-theme="dark"] .latest-badge {
    background: var(--color-primary);
    color: var(--color-secondary);
}


.page-loader {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease;
}
.page-loader.hidden {
    opacity: 0;
    pointer-events: none;
}
.loader-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}


.modal-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.modal-back {
    background: none;
    border: none;
    color: var(--color-accent);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    transition: color 0.3s ease;
}
.modal-back:hover {
    color: var(--color-primary);
}


.article-read-info {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}


pre {
    position: relative;
}
.copy-code-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--color-accent);
    opacity: 0;
    transition: opacity 0.2s ease;
}
pre:hover .copy-code-btn {
    opacity: 1;
}
.copy-code-btn:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}


.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}
.article-nav a {
    font-size: 0.9rem;
    color: var(--color-accent);
    transition: color 0.3s ease;
    max-width: 45%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-nav a:hover {
    color: var(--color-primary);
}
.article-nav-prev i, .article-nav-next i {
    font-size: 0.75rem;
}


.article-toc { background: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: 4px; padding: 16px 20px; margin-bottom: 24px; }
.toc-title { font-size: 0.95rem; font-weight: 500; margin-bottom: 10px; }
.toc-list { list-style: none; padding: 0; margin: 0; }
.toc-list li { margin-bottom: 6px; }
.toc-list a { font-size: 0.9rem; color: var(--color-accent); transition: color 0.2s ease; }
.toc-list a:hover { color: var(--color-primary); }
[data-theme="dark"] .article-toc { background: var(--color-bg-alt); border-color: var(--color-border); }


@media print {
    .site-header, .site-footer, .modal-overlay, .modal-top-bar,
    .share-bar, .reading-progress, .back-to-top, .page-loader,
    .nav-toggle, .theme-toggle, .article-nav, .article-toc,
    .copy-code-btn, .zoom-overlay { display: none !important; }
    .modal { position: static; background: none; }
    .modal-body { max-width: 100%; padding: 0; box-shadow: none; }
    .modal-article { color: #000; font-size: 12pt; }
    .modal-article h1, .modal-article h2, .modal-article h3 { color: #000; }
    body { font-size: 12pt; color: #000; background: #fff; }
}


[data-theme="dark"] .video-thumb-img,
[data-theme="dark"] .modal-article img { filter: brightness(0.85); }


.offline-banner {
    background: #ff9800;
    color: #fff;
    text-align: center;
    padding: 8px;
    font-size: 0.85rem;
    z-index: 9999;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
}


.word-count { display: inline-flex; align-items: center; gap: 4px; font-size: 0.85rem; color: var(--color-accent); }
.word-count i { font-size: 0.75rem; }


.article-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tag { display: inline-block; padding: 2px 10px; background: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: 12px; font-size: 0.75rem; color: var(--color-accent); transition: all 0.2s ease; }
.tag:hover { border-color: var(--color-primary); color: var(--color-primary); }
[data-theme="dark"] .tag { background: var(--color-bg-alt); border-color: var(--color-border); }


.site-header { transition: transform 0.3s ease; }
.site-header.header-hidden { transform: translateY(-100%); }


.article-card.latest::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), transparent);
    border-radius: var(--radius) var(--radius) 0 0;
}
.article-card.latest { position: relative; }


.video-card { position: relative; }
.video-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-douyin);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}
.video-card:hover::after { transform: scaleX(1); }


.file-download { position: relative; overflow: hidden; }
.file-download::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}
.file-download:hover::before { left: 100%; }


.search-input { transition: border-color 0.3s ease, box-shadow 0.3s ease; }
.search-input:focus { box-shadow: 0 0 0 3px rgba(0,0,0,0.05); }
[data-theme="dark"] .search-input:focus { box-shadow: 0 0 0 3px rgba(255,255,255,0.05); }


.related-articles {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}
.related-title {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--color-text);
}
.related-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.related-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.2s ease;
}
.related-item:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-alt);
}
.related-date {
    font-size: 0.8rem;
    color: var(--color-accent);
    white-space: nowrap;
}
.related-name {
    font-size: 0.9rem;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}


.modal-article pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 16px 20px;
    border-radius: var(--radius);
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 20px 0;
}
.modal-article code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}
.modal-article :not(pre) > code {
    background: var(--color-bg-alt);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.85em;
    color: var(--color-douyin);
}
[data-theme="dark"] .modal-article pre {
    background: #0d0d0d;
    color: #e0e0e0;
}
[data-theme="dark"] .modal-article :not(pre) > code {
    background: #2a2a2a;
    color: var(--color-douyin);
}


.modal-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.95rem;
}
.modal-article th, .modal-article td {
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    text-align: left;
}
.modal-article th {
    background: var(--color-bg-alt);
    font-weight: 500;
}
.modal-article tr:hover {
    background: var(--color-bg-alt);
}

.modal[aria-hidden="false"] .modal-body { animation: modalSlideIn 0.3s ease both; }
@keyframes modalSlideIn { from { opacity: 0; transform: translateY(20px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }

.section-hidden { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.section-visible { opacity: 1; transform: translateY(0); }
[data-theme] { transition: background-color 0.3s ease, color 0.3s ease; }

/* 精选文章横幅 */
.featured-banner {
    margin-top: 24px;
    animation: fadeInUp 0.8s ease 0.4s both;
}
.featured-link {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}
.featured-link:hover {
    border-color: var(--color-primary);
    background: rgba(0,0,0,0.02);
}
[data-theme="dark"] .featured-link:hover {
    background: rgba(255,255,255,0.02);
}
.featured-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-accent);
}
.featured-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-text);
}
.featured-summary {
    font-size: 0.85rem;
    color: var(--color-accent);
}

.article-card:hover { box-shadow: 0 4px 6px rgba(0,0,0,0.04), 0 10px 20px rgba(0,0,0,0.06); }
.file-icon { transition: color 0.3s ease; }
.file-card:hover .file-icon { color: var(--color-primary); }
.modal-article a { color: var(--color-primary); text-decoration: underline; text-decoration-color: var(--color-border); text-underline-offset: 3px; transition: text-decoration-color 0.2s ease; }
.modal-article a:hover { text-decoration-color: var(--color-primary); }
/* perf */ .modal-body { will-change: transform; } .hero h2, .hero p { will-change: opacity, transform; }


/* 已读文章标记 */
.article-card.read {
    opacity: 0.75;
}
.article-card.read::after {
    content: '已读';
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 0.7rem;
    color: var(--color-accent);
    background: var(--color-bg-alt);
    padding: 2px 8px;
    border-radius: 2px;
}


.sort-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}
.sort-btn {
    padding: 6px 16px;
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-accent);
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: var(--radius);
    transition: all 0.2s ease;
}
.sort-btn.active, .sort-btn:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}