/* ============================================
   文章增强功能样式
   功能: TOC目录、标签、阅读时长、相关推荐、评论、行号、系列导航
   ============================================ */

/* ============================================
   返回文章列表按钮
   ============================================ */
.article-back {
    margin-bottom: 1.5rem;
}

.article-back .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: all 0.25s ease;
}

.article-back .btn:hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateX(-3px);
}

.article-back .btn i {
    font-size: 0.85em;
}

/* ============================================
   文章头部信息栏（阅读时长 + 分类 + 日期）
   ============================================ */
.article-meta-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.article-meta-bar .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.article-meta-bar .meta-item i {
    color: var(--primary);
    font-size: 0.9em;
}

.article-meta-bar .meta-divider {
    width: 1px;
    height: 16px;
    background: var(--border-color);
}

.article-meta-bar .meta-category {
    padding: 0.2rem 0.6rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.8rem;
}

/* ============================================
   TOC 目录侧边栏
   ============================================ */
.article-toc {
    position: fixed;
    top: 100px;
    left: 20px;
    width: 250px;
    max-height: calc(100vh - 280px);
    overflow-y: auto;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    z-index: 100;
    box-shadow: var(--shadow-md);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.article-toc.toc-hidden {
    opacity: 0;
    transform: translateX(-20px);
    pointer-events: none;
}

.article-toc .toc-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.article-toc .toc-title i {
    color: var(--primary);
}

.article-toc .toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.article-toc .toc-item {
    margin-bottom: 0.25rem;
}

.article-toc .toc-link {
    display: block;
    padding: 0.3rem 0.5rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.article-toc .toc-link:hover {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.06);
    border-left-color: var(--primary-light);
}

.article-toc .toc-link.toc-active {
    color: var(--primary);
    font-weight: 600;
    background: rgba(99, 102, 241, 0.1);
    border-left-color: var(--primary);
}

.article-toc .toc-item-h3 .toc-link {
    padding-left: 1.5rem;
    font-size: 0.78rem;
}

/* TOC 移动端切换按钮 */
.toc-toggle-btn {
    display: none;
    position: fixed;
    bottom: 90px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border: none;
    cursor: pointer;
    z-index: 1001;
    box-shadow: var(--shadow-lg);
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    touch-action: manipulation;
}

.toc-toggle-btn:hover {
    transform: scale(1.08);
    box-shadow: var(--shadow-glow);
}

/* 小屏进一步调整 TOC 按钮位置 */
@media (max-width: 768px) {
    .toc-toggle-btn {
        right: 16px;
        bottom: 95px;
    }
}

/* 响应式：大屏显示侧边栏，小屏隐藏 */
@media (max-width: 1200px) {
    .article-toc {
        display: none;
    }
    .toc-toggle-btn {
        display: flex;
    }
}

/* 移动端 TOC 弹出层 */
.article-toc.toc-mobile-show {
    display: block;
    position: fixed;
    top: 50%;
    left: 50%;
    right: auto;
    transform: translate(-50%, -50%);
    width: 85%;
    max-width: 350px;
    max-height: 70vh;
    z-index: 10001;
}

.toc-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 10000;
}

.toc-overlay.toc-overlay-show {
    display: block;
}

/* ============================================
   文章底部标签区域
   ============================================ */
.article-tags-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.article-tags-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.article-tags-label i {
    color: var(--primary);
}

.article-tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.article-tags-list .article-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 500;
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary);
    border: 1px solid rgba(99, 102, 241, 0.15);
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.article-tags-list .article-tag::before {
    content: '#';
    opacity: 0.6;
    margin-right: 0.1rem;
}

.article-tags-list .article-tag:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* ============================================
   系列导航（上一篇/下一篇）
   ============================================ */
.series-nav {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.series-nav-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.series-nav-header .series-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
}

.series-nav-header .series-progress {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.series-nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.series-nav-link {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
}

.series-nav-link:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.series-nav-link.series-next {
    text-align: right;
}

.series-nav-link .nav-direction {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.series-nav-link.series-next .nav-direction {
    justify-content: flex-end;
}

.series-nav-link .nav-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    line-height: 1.4;
}

.series-nav-link.series-placeholder {
    opacity: 0.4;
    pointer-events: none;
}

@media (max-width: 600px) {
    .series-nav-links {
        grid-template-columns: 1fr;
    }
    .series-nav-link.series-next {
        text-align: left;
    }
    .series-nav-link.series-next .nav-direction {
        justify-content: flex-start;
    }
}

/* ============================================
   相关推荐区域
   ============================================ */
.related-articles {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.related-articles-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.related-articles-header i {
    color: var(--primary);
}

.related-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

.related-article-card {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
}

.related-article-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.related-article-card .related-category {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 500;
}

.related-article-card .related-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

.related-article-card:hover .related-title {
    color: var(--primary);
}

.related-article-card .related-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: auto;
}

/* ============================================
   代码块行号
   ============================================ */
.code-with-linenumbers {
    position: relative;
    display: flex;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.code-line-numbers {
    flex-shrink: 0;
    padding: var(--space-md) 0.5rem var(--space-md) var(--space-md);
    background: rgba(0, 0, 0, 0.15);
    color: #6c7086;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    text-align: right;
    user-select: none;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    white-space: pre;
    overflow: hidden;
}

.code-with-linenumbers pre {
    flex: 1;
    margin: 0;
    border-radius: 0;
}

/* ============================================
   Demo 链接按钮
   ============================================ */
.demo-link-section {
    margin: 1.5rem 0;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(236, 72, 153, 0.06));
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.demo-link-section .demo-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.demo-link-section .demo-label i {
    color: var(--accent);
}

.demo-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.1rem;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    box-shadow: 0 2px 10px rgba(6, 182, 212, 0.3);
}

.demo-link-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
    color: #fff;
}

.source-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
}

.source-link-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ============================================
   归档页标签筛选
   ============================================ */
.tag-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.tag-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 500;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
    touch-action: manipulation;
}

.tag-filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.tag-filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.tag-filter-btn .tag-count {
    font-size: 0.72rem;
    opacity: 0.7;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.05rem 0.35rem;
    border-radius: var(--radius-full);
}

.tag-filter-btn:not(.active) .tag-count {
    background: rgba(0, 0, 0, 0.06);
}

/* ============================================
   写作计划时间线
   ============================================ */
.writing-plan {
    padding: var(--space-3xl) 0;
    background: var(--bg-primary);
}

.writing-plan-timeline {
    position: relative;
    max-width: 800px;
    margin: 2rem auto 0;
    padding-left: 2rem;
}

.writing-plan-timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary), var(--accent));
    border-radius: 1px;
}

.plan-item {
    position: relative;
    padding: 0 0 1.5rem 2rem;
}

.plan-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.3rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 3px solid var(--primary);
    z-index: 1;
    transition: all 0.3s ease;
}

.plan-item.plan-done::before {
    background: var(--primary);
}

.plan-item.plan-in-progress::before {
    background: var(--accent);
    border-color: var(--accent);
    animation: pulse-ring 2s ease-in-out infinite;
}

@keyframes pulse-ring {
    0%, 100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(6, 182, 212, 0); }
}

.plan-item .plan-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.2rem;
}

.plan-item .plan-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.plan-item .plan-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.plan-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.1rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.plan-status-done {
    background: rgba(34, 197, 94, 0.12);
    color: #16a34a;
}

.plan-status-progress {
    background: rgba(6, 182, 212, 0.12);
    color: #0891b2;
}

.plan-status-planned {
    background: rgba(148, 163, 184, 0.12);
    color: var(--text-muted);
}

/* ============================================
   填坑计划可视化看板
   ============================================ */
.plan-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.plan-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.plan-card.done { border-top: 4px solid #22c55e; }
.plan-card.in-progress { border-top: 4px solid var(--accent); }
.plan-card.planned { border-top: 4px solid var(--text-muted); }

.plan-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.plan-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: #fff;
    flex-shrink: 0;
}

.plan-card.done .plan-icon { background: linear-gradient(135deg, #22c55e, #16a34a); }
.plan-card.in-progress .plan-icon { background: linear-gradient(135deg, var(--accent), #0891b2); }
.plan-card.planned .plan-icon { background: linear-gradient(135deg, var(--text-muted), #64748b); }

.plan-info { flex: 1; min-width: 0; }
.plan-info h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
}
.plan-count {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.plan-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}
.plan-badge.done { background: rgba(34, 197, 94, 0.12); color: #16a34a; }
.plan-badge.in-progress { background: rgba(6, 182, 212, 0.12); color: #0891b2; }
.plan-badge.planned { background: rgba(148, 163, 184, 0.12); color: var(--text-muted); }

.plan-progress {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.plan-progress-bar {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 1s ease;
}

.plan-card.done .plan-progress-bar { background: linear-gradient(90deg, #22c55e, #16a34a); }
.plan-card.in-progress .plan-progress-bar { background: linear-gradient(90deg, var(--accent), #0891b2); }
.plan-card.planned .plan-progress-bar { background: var(--text-muted); }

.plan-card .plan-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.plan-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}
.plan-link:hover { color: var(--primary-dark); }

@media (max-width: 768px) {
    .plan-dashboard { grid-template-columns: 1fr; gap: 1rem; }
    .plan-card { padding: 1.25rem; }
    .plan-badge { font-size: 0.7rem; padding: 0.2rem 0.5rem; }
}

/* ============================================
   专题系列卡片
   ============================================ */
.series-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.series-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.series-card-header {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(236, 72, 153, 0.04));
    border-bottom: 1px solid var(--border-color);
}

.series-card-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.series-card-header p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.series-card-body {
    padding: 1rem 1.5rem;
}

.series-card-body .series-article-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.88rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.series-card-body .series-article-item:last-child {
    border-bottom: none;
}

.series-card-body .series-article-item:hover {
    color: var(--primary);
}

.series-card-body .series-article-item .article-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.series-card-footer {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ============================================
   Debug日记/踩坑记录
   ============================================ */
.debug-diary-item {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    border-left: 4px solid var(--secondary);
}

.debug-diary-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(4px);
}

.debug-diary-item .diary-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
    flex-wrap: wrap;
}

.debug-diary-item .diary-bug-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #ef4444, #f59e0b);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.9rem;
}

.debug-diary-item .diary-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.debug-diary-item .diary-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.debug-diary-item .diary-content {
    margin-top: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9rem;
}

.debug-diary-item .diary-solution {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(34, 197, 94, 0.06);
    border-left: 3px solid #22c55e;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.debug-diary-item .diary-solution .solution-label {
    font-weight: 600;
    color: #16a34a;
    margin-right: 0.3rem;
}

.debug-diary-item .diary-tags {
    margin-top: 0.75rem;
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.debug-diary-item .diary-tag {
    font-size: 0.72rem;
    padding: 0.15rem 0.5rem;
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary);
    border-radius: var(--radius-full);
}

/* ============================================
   404彩蛋区域
   ============================================ */
.easter-egg-section {
    margin: 2rem auto;
    max-width: 500px;
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px dashed var(--border-color);
}

.easter-egg-section .egg-title {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.easter-egg-section .egg-content {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: pre;
    overflow-x: auto;
    line-height: 1.3;
}

/* ============================================
   关于页故事区域
   ============================================ */
.about-story {
    max-width: 700px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.about-story h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.about-story h3 i {
    color: var(--secondary);
}

.about-story p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.about-story .story-quote {
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--primary);
    background: rgba(99, 102, 241, 0.04);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-style: italic;
    color: var(--text-primary);
    margin: 1rem 0;
}

/* ============================================
   学习资源导航页
   ============================================ */
.resource-roadmap {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.resource-roadmap h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.resource-roadmap h3 i {
    color: var(--primary);
}

.resource-roadmap .roadmap-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.resource-roadmap .roadmap-step {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.85rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.resource-roadmap .roadmap-step:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.resource-roadmap .roadmap-arrow {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.resource-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.resource-link-card {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
}

.resource-link-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.resource-link-card .resource-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.resource-link-card .resource-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.resource-link-card .resource-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ============================================
   配套资源板块
   ============================================ */
.article-resources {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.resources-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.resources-header i {
    color: var(--primary);
}

.resources-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* 资源卡片 */
.resource-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.25s ease;
}

.resource-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.resource-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.resource-card-info {
    flex: 1;
    min-width: 0;
}

.resource-card-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.resource-card-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.resource-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    flex-shrink: 0;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

.resource-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    color: #fff;
}

.resource-download-btn i {
    font-size: 0.9em;
}

/* 前置环境搭建提示 */
.resource-env-hint {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(99, 102, 241, 0.06));
    border: 1px solid rgba(6, 182, 212, 0.15);
    border-radius: var(--radius-lg);
}

.env-hint-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(6, 182, 212, 0.12);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.env-hint-content {
    flex: 1;
    min-width: 0;
}

.env-hint-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.env-hint-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.env-hint-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.9rem;
    background: var(--bg-primary);
    color: var(--accent);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.env-hint-link:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* 响应式适配 */
@media (max-width: 600px) {
    .resource-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .resource-download-btn {
        width: 100%;
        justify-content: center;
    }

    .resource-env-hint {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* 暗色主题适配 */
[data-theme="dark"] .debug-diary-item .diary-solution {
    background: rgba(34, 197, 94, 0.08);
}

[data-theme="dark"] .demo-link-section {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.08));
}

[data-theme="dark"] .code-line-numbers {
    background: rgba(0, 0, 0, 0.3);
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    .article-toc,
    .toc-toggle-btn,
    .related-article-card,
    .series-nav-link,
    .plan-item::before {
        transition: none !important;
        animation: none !important;
    }
}

/* ============================================
   面包屑导航
   ============================================ */
.article-breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.35rem;
    padding: 0.6rem 0.8rem;
    margin-bottom: 1.2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.article-breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
    touch-action: manipulation;
}

.article-breadcrumb a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.article-breadcrumb .bc-sep {
    font-size: 0.65rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

.article-breadcrumb .bc-current {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   难度标签
   ============================================ */
.difficulty-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
}

.difficulty-1 {
    background: rgba(34, 197, 94, 0.12);
    color: #16a34a;
}

.difficulty-2 {
    background: rgba(245, 158, 11, 0.12);
    color: #d97706;
}

.difficulty-3 {
    background: rgba(239, 68, 68, 0.12);
    color: #dc2626;
}

[data-theme="dark"] .difficulty-1 { color: #4ade80; }
[data-theme="dark"] .difficulty-2 { color: #fbbf24; }
[data-theme="dark"] .difficulty-3 { color: #f87171; }

/* ============================================
   点赞按钮
   ============================================ */
.article-like-section {
    display: flex;
    justify-content: center;
    padding: 2rem 0 1rem;
}

.article-like-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.25s ease;
    touch-action: manipulation;
    user-select: none;
}

.article-like-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.06);
}

.article-like-btn.liked {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.article-like-btn .like-count {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ============================================
   多平台分发引导
   ============================================ */
.article-share-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border-color);
}

.share-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.share-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all 0.2s;
    touch-action: manipulation;
    text-decoration: none;
}

.share-link:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* ============================================
   宽屏时为 TOC 预留左侧空间
   ============================================ */
@media (min-width: 1201px) {
    body.has-toc .main-content {
        margin-left: 310px;
        margin-right: 20px;
        max-width: calc(100vw - 330px);
    }
}