/* ==========================================================================
   良心云机场 · 知识科普与文章阅读专用样式表
   方案 B：星链矩阵 · 阅读体验优先排版
   ========================================================================== */

.article-page {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 80px;
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.breadcrumb-nav a {
  color: var(--text-muted);
  transition: color 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.breadcrumb-nav a:hover {
  color: var(--accent-highlight);
}
.breadcrumb-sep {
  color: rgba(157, 180, 178, 0.4);
}
.breadcrumb-current {
  color: var(--accent-brand);
}

/* Article Container */
.article-wrapper {
  max-width: 860px;
  margin: 0 auto;
}

/* Article Header */
.article-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-glow);
  padding-bottom: 28px;
}
.article-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-brand);
  margin-bottom: 16px;
}
.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(80, 227, 194, 0.08);
  border: 1px solid var(--border-glow);
  padding: 4px 10px;
  border-radius: 4px;
}
.article-title {
  font-size: 2.25rem;
  line-height: 1.35;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.article-lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Article Body Typography (High Readability, No Card Trap) */
.article-body {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: #D6E4E2;
}
.article-body p {
  margin-bottom: 24px;
}
.article-body h2 {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(143, 255, 224, 0.12);
  display: flex;
  align-items: center;
  gap: 10px;
}
.article-body h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--accent-brand);
  border-radius: 2px;
}
.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent-highlight);
  margin-top: 30px;
  margin-bottom: 14px;
}
.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 28px;
}
.article-body li {
  margin-bottom: 10px;
  line-height: 1.75;
}
.article-body strong {
  color: #FFFFFF;
  font-weight: 600;
}
.article-body a {
  color: var(--accent-brand);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}
.article-body a:hover {
  color: var(--accent-highlight);
}

/* Callout Box */
.article-callout {
  background: var(--panel-base);
  border-left: 4px solid var(--accent-brand);
  border-radius: 0 8px 8px 0;
  padding: 18px 22px;
  margin: 28px 0;
  font-size: 0.9375rem;
  color: var(--text-primary);
}
.article-callout-title {
  font-weight: 700;
  color: var(--accent-highlight);
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* Article FAQ Component (Default Open) */
.article-faq-wrap {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-glow);
}
.article-faq-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.article-faq-item {
  background: var(--panel-base);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  margin-bottom: 14px;
  overflow: hidden;
}
.article-faq-summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.article-faq-summary::-webkit-details-marker {
  display: none;
}
.article-faq-summary::after {
  content: "−";
  font-family: var(--font-mono);
  color: var(--accent-brand);
  font-size: 1.125rem;
}
.article-faq-item:not([open]) .article-faq-summary::after {
  content: "+";
}
.article-faq-content {
  padding: 0 20px 18px 20px;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Related Articles Navigation */
.related-nav-wrap {
  margin-top: 56px;
  padding: 28px;
  background: var(--panel-base);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
}
.related-nav-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.related-links-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.related-card {
  background: var(--panel-sub);
  border: 1px solid rgba(143, 255, 224, 0.08);
  border-radius: 8px;
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
  min-height: 44px;
}
.related-card:hover {
  border-color: var(--accent-brand);
  transform: translateX(3px);
}
.related-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.related-card-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-brand);
}

/* Knowledge List Hub Page */
.knowledge-hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.knowledge-article-card {
  background: var(--panel-base);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}
.knowledge-article-card:hover {
  border-color: var(--border-glow-hover);
  transform: translateY(-2px);
}
.k-card-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-brand);
  margin-bottom: 10px;
}
.k-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}
.k-card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.k-card-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(143, 255, 224, 0.08);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-highlight);
}

@media (max-width: 768px) {
  .article-title {
    font-size: 1.75rem;
  }
  .related-links-grid {
    grid-template-columns: 1fr;
  }
  .knowledge-hub-grid {
    grid-template-columns: 1fr;
  }
}