/* ==========================================================================
   扬帆云 (Yangfan Cloud) - Article / Blog Page Styles
   Clean, Readable, High-Performance Typography for SEO Content
   ========================================================================== */

.article-hero {
  padding: 60px 0 40px;
  background: radial-gradient(circle at 50% 0%, #eaf4ff 0%, #ffffff 80%);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--color-text-muted);
}

.breadcrumb-nav a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  color: #cbd5e1;
}

.article-main-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.35;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.article-meta-header {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  flex-wrap: wrap;
}

.meta-author {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--color-text-main);
}

.meta-author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* Article Layout Grid (Content + Sticky Sidebar) */
.article-layout {
  padding: 60px 0 100px;
}

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 48px;
  align-items: start;
}

/* Article Body Typography */
.article-body {
  font-size: 1.08rem;
  line-height: 1.85;
  color: #1e293b;
}

.article-lead {
  font-size: 1.2rem;
  line-height: 1.75;
  color: #334155;
  padding: 20px 24px;
  background: #f8fafc;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 32px;
}

.article-body h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid #f1f5f9;
  position: relative;
}

.article-body h2::before {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background-color: var(--color-primary);
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin: 30px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body strong {
  font-weight: 700;
  color: var(--color-text-main);
}

.article-body ul, .article-body ol {
  margin: 16px 0 24px 20px;
}

.article-body ul li {
  list-style-type: disc;
  margin-bottom: 10px;
}

.article-body ol li {
  list-style-type: decimal;
  margin-bottom: 10px;
}

.article-body blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  background: var(--color-cloud-light);
  border-left: 4px solid #60a5fa;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: #334155;
}

.article-callout {
  padding: 22px 26px;
  border-radius: var(--radius-md);
  margin: 32px 0;
  background: #f0f7ff;
  border: 1px solid #bfdbfe;
}

.article-callout-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.article-table th {
  background: #f1f5f9;
  color: var(--color-text-main);
  font-weight: 700;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
}

.article-table td {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.article-table tr:nth-child(even) {
  background-color: #f8fafc;
}

/* Article Internal Linking Banner */
.article-cta-box {
  margin: 48px 0;
  padding: 32px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  color: #ffffff;
  text-align: center;
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.25);
}

.article-cta-box h3 {
  color: #ffffff;
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: 10px;
}

.article-cta-box p {
  color: #dbeafe;
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 20px;
}

.article-cta-box .btn {
  background-color: #ffffff;
  color: var(--color-primary);
  font-weight: 700;
}

.article-cta-box .btn:hover {
  background-color: #f8fafc;
  transform: translateY(-2px);
}

/* Article Sidebar */
.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-widget {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.widget-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e2e8f0;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.92rem;
}

.toc-list a {
  color: var(--color-text-muted);
  display: block;
  line-height: 1.4;
  padding: 4px 0;
  border-left: 2px solid transparent;
  padding-left: 8px;
}

.toc-list a:hover {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.sidebar-post-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar-post-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-post-item a {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.4;
}

.sidebar-post-item a:hover {
  color: var(--color-primary);
}

.sidebar-post-date {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.sidebar-cta-widget {
  background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
  border: 1px solid #bfdbfe;
  text-align: center;
}

.sidebar-cta-widget img {
  width: 54px;
  height: 54px;
  margin: 0 auto 12px;
}

.sidebar-cta-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 6px;
}

.sidebar-cta-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.interlink-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 40px 0;
}

.interlink-card {
  padding: 16px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.interlink-card:hover {
  border-color: #93c5fd;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.interlink-card-label {
  font-size: 0.75rem;
  color: var(--color-primary);
  font-weight: 700;
  margin-bottom: 4px;
}

.interlink-card a {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.4;
}

.interlink-card a:hover {
  color: var(--color-primary);
}

@media (max-width: 992px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
    margin-top: 40px;
  }
  .interlink-grid {
    grid-template-columns: 1fr;
  }
}