/* ==========================================================================
   ARK 知识科普与文章阅读页专用样式表
   Design: Editorial Monochrome Minimalist, Long-form Readability
   ========================================================================== */

.article-page-header {
  padding: 60px 0 40px 0;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-nav a:hover {
  color: var(--accent-white);
  text-decoration: underline;
}

.article-header-title {
  font-size: clamp(28px, 4.2vw, 44px);
  font-weight: 800;
  color: var(--accent-white);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.025em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-meta-bar span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-main-container {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
  padding: 60px 0 90px 0;
  align-items: start;
}

.article-body {
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-secondary);
}

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

.article-body h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent-white);
  margin: 44px 0 18px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px 0;
}

.article-body ul, 
.article-body ol {
  margin-bottom: 24px;
  padding-left: 28px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body blockquote {
  border-left: 3px solid var(--accent-white);
  background: var(--bg-secondary);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 28px 0;
  color: var(--text-secondary);
  font-style: normal;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.article-body th,
.article-body td {
  padding: 12px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 14.5px;
}

.article-body th {
  background: var(--bg-tertiary);
  color: var(--accent-white);
  font-weight: 700;
}

/* 文章内部原生引流卡片 */
.article-promo-box {
  background: linear-gradient(180deg, #181822 0%, #111116 100%);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 40px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-subtle);
}

.article-promo-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--accent-white);
}

.article-promo-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 侧边栏与导读目录 */
.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-widget {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-widget-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-links-list li a {
  font-size: 13.5px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: block;
}

.sidebar-links-list li a:hover {
  color: var(--accent-white);
  text-decoration: underline;
}

@media (max-width: 900px) {
  .article-main-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .article-sidebar {
    position: static;
  }
}