/* ==========================================================================
   大肥鱼 (DaFeiYu) Blog - Article Page Specific Stylesheet (dafeiyu.blog)
   Theme Adaptive (Light & Dark Support)
   ========================================================================== */

/* Reading Progress Bar (Fixed Top) */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  z-index: 9999;
  transition: width 0.1s ease-out;
  box-shadow: 0 0 10px rgba(79, 70, 229, 0.5);
}

/* Breadcrumbs Navigation */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--accent-primary);
}

.breadcrumbs .separator {
  color: var(--border-color);
  font-size: 11px;
}

.breadcrumbs .current {
  color: var(--text-muted);
  max-width: 280px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Article Header */
.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

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

.article-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 12.5px;
  color: var(--text-secondary);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.article-meta-item i {
  color: var(--accent-primary);
  font-size: 13px;
}

/* Article Body Typography */
.article-card-main {
  padding: 28px 32px;
  margin-bottom: 28px;
}

.article-content {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-primary);
}

/* Lead Paragraph */
.article-lead {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
  background: var(--accent-primary-light);
  border: 1px solid var(--border-color);
  border-left: 3.5px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 28px;
}

/* Headings */
.article-content h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 34px;
  margin-bottom: 14px;
  padding-left: 12px;
  border-left: 3px solid var(--accent-primary);
  line-height: 1.4;
  scroll-margin-top: 90px;
}

.article-content h3 {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 24px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  scroll-margin-top: 90px;
}

.article-content h3::before {
  content: "#";
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 14.5px;
}

/* Paragraphs */
.article-content p {
  margin-bottom: 1.15em;
  color: var(--text-secondary);
  word-break: break-word;
}

.article-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Inline Code & Code Blocks */
.article-content code:not(pre code) {
  background: var(--bg-input);
  color: var(--accent-primary);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 13px;
  font-family: 'JetBrains Mono', Consolas, Monaco, 'Courier New', monospace;
  border: 1px solid var(--border-color);
}

.article-content pre {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 24px 0;
  position: relative;
}

.article-content pre code {
  font-family: 'JetBrains Mono', Consolas, Monaco, 'Courier New', monospace;
  font-size: 13.5px;
  line-height: 1.65;
  background: transparent;
  padding: 0;
  color: var(--text-primary);
}

/* Blockquote */
.article-content blockquote {
  border-left: 3px solid var(--accent-secondary);
  background: var(--accent-secondary-light);
  border-radius: 0 8px 8px 0;
  padding: 16px 22px;
  margin: 24px 0;
  color: var(--text-secondary);
  font-style: italic;
  position: relative;
}

.article-content blockquote p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.article-content blockquote p strong {
  color: var(--accent-secondary);
  font-style: normal;
}

/* Lists */
.article-content ul,
.article-content ol {
  margin: 18px 0;
  padding-left: 20px;
}

.article-content ul li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 6px;
  color: var(--text-secondary);
}

.article-content ul li::marker {
  color: var(--accent-primary);
}

.article-content ol {
  list-style-type: decimal;
}

.article-content ol li {
  margin-bottom: 10px;
  padding-left: 6px;
  color: var(--text-secondary);
}

.article-content ol li::marker {
  color: var(--accent-primary);
  font-weight: 600;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 30px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.article-table th {
  background: var(--bg-input);
  color: var(--text-primary);
  font-weight: 600;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.article-table td {
  padding: 13px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.article-table tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.015);
}

[data-theme="dark"] .article-table tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.015);
}

.article-table tr:hover {
  background: var(--accent-primary-light);
}

.rating-stars {
  color: #f59e0b;
}

/* ==========================================================================
   Table of Contents (TOC) Right Sidebar
   ========================================================================== */
.toc-container {
  width: var(--right-sidebar-width, 240px);
  flex-shrink: 0;
  position: sticky;
  top: 80px;
  align-self: flex-start;
}

.toc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px 16px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
  box-shadow: var(--shadow-card);
}

.toc-card::-webkit-scrollbar {
  width: 4px;
}

.toc-card::-webkit-scrollbar-track {
  background: transparent;
}

.toc-card::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.toc-card::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.toc-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-title i {
  color: var(--accent-primary);
  font-size: 13px;
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-link {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.5;
  padding: 6px 10px;
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
  display: block;
  text-decoration: none;
  white-space: normal;
  word-break: break-word;
}

.toc-link:hover {
  color: var(--accent-primary);
  background: var(--bg-input);
}

.toc-link.toc-h3 {
  padding-left: 20px;
  font-size: 12px;
  color: var(--text-muted);
}

.toc-link.toc-h3:hover {
  color: var(--accent-primary);
}

.toc-link.active {
  color: var(--accent-primary);
  background: var(--accent-primary-light);
  border-left-color: var(--accent-primary);
  font-weight: 600;
}

/* ==========================================================================
   Post Navigation (Prev/Next Cards)
   ========================================================================== */
.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 36px;
}

.nav-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.nav-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.nav-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

.nav-card.next {
  text-align: right;
  align-items: flex-end;
}


/* ==========================================================================
   Responsive Breakpoints for Article
   ========================================================================== */
@media (max-width: 1200px) and (min-width: 961px) {
  .toc-container {
    width: 210px;
  }
}

@media (max-width: 960px) {
  .toc-container {
    display: none;
  }
}

@media (max-width: 768px) {
  .article-card-main {
    padding: 24px 18px;
  }

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

  .post-navigation {
    grid-template-columns: 1fr;
  }

  .nav-card.next {
    text-align: left;
    align-items: flex-start;
  }
}

/* ==========================================================================
   External Download Box (外部官方下载渠道卡片)
   ========================================================================== */
.download-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 28px 0;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.download-box-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
}

.download-box-header i {
  color: var(--accent-primary);
  font-size: 17px;
}

.download-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.download-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.12);
}

.download-btn .btn-text {
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-btn i.fa-arrow-up-right-from-square {
  font-size: 11px;
  opacity: 0.6;
}

@media (max-width: 640px) {
  .download-links-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   FAQ Section Styles
   ========================================================================== */
.article-faq-wrapper {
  margin-top: 36px;
}

.faq-container {
  margin: 20px 0 32px 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  padding: 18px 22px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.faq-question {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 15px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  line-height: 1.5;
}

.faq-q-badge {
  color: var(--accent-primary);
  font-weight: 800;
  font-size: 14px;
  flex-shrink: 0;
}

.faq-answer {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
}

/* ==========================================================================
   Related Articles & High-Density Internal Links Grid
   ========================================================================== */
.related-articles-section {
  margin: 40px 0 24px 0;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.related-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.related-article-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.related-article-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.09);
}

.related-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.related-card-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

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

.related-card-excerpt {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-color);
  padding-top: 10px;
  margin-top: auto;
}

.related-read-more {
  color: var(--accent-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: transform var(--transition-fast);
}

.related-article-card:hover .related-read-more {
  transform: translateX(3px);
}

@media (max-width: 640px) {
  .related-articles-grid {
    grid-template-columns: 1fr;
  }
}