/* ==========================================================================
   方案 C · 云梯之环 | YYT-ORBIT-C03 文章与附属页面独立排版规范
   ========================================================================== */

.page-wrapper {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 100px;
  min-height: calc(100vh - var(--header-height));
}

.article-hero {
  text-align: center;
  padding: 40px 0 60px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 56px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.breadcrumb-nav a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-smooth);
}
.breadcrumb-nav a:hover {
  color: var(--ice-blue);
}
.breadcrumb-separator {
  opacity: 0.4;
}

.article-main-title {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 20px;
  text-wrap: balance;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-badge {
  background: rgba(145, 221, 247, 0.12);
  border: 1px solid var(--ice-blue);
  color: var(--ice-blue);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

/* 核心正文单栏舒适阅读区 */
.article-single-column {
  max-width: 820px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.85;
  color: #D3DCF5;
}

.article-single-column h2 {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-single-column h3 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--ice-blue);
  margin: 36px 0 16px;
}

.article-single-column p {
  margin-bottom: 24px;
}

.article-single-column ul, 
.article-single-column ol {
  margin: 0 0 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-single-column li {
  line-height: 1.75;
}

.article-callout {
  background: rgba(154, 134, 245, 0.08);
  border-left: 4px solid var(--aurora-purple);
  padding: 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 32px 0;
  color: var(--text-primary);
}
.article-callout p:last-child {
  margin-bottom: 0;
}

.article-internal-links {
  margin-top: 64px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle);
}
.article-internal-links h4 {
  font-size: 1.25rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.related-post-card {
  background: rgba(17, 24, 49, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  text-decoration: none;
  transition: var(--transition-smooth);
}
.related-post-card:hover {
  border-color: var(--ice-blue);
  transform: translateY(-2px);
}
.related-post-title {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 8px;
}
.related-post-tag {
  color: var(--ice-blue);
  font-size: 0.8rem;
}

/* 知识库主列表页排版 */
.knowledge-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
  margin-top: 48px;
}
.knowledge-card {
  background: rgba(17, 24, 49, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
}
.knowledge-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}
.knowledge-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}
.knowledge-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}
.knowledge-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ice-blue);
  font-weight: 600;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}