/* ==========================================================================
   原创知识文章专有样式表 (Article System)
   轻语机场 (qingyujc.lol) - 框架31 森林晨雾 · 纯净白+青(White + Cyan)
   ========================================================================== */

.article-page {
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 100px;
}

/* 面包屑导航 */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-subtle);
  margin-bottom: 30px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: rgba(13, 148, 136, 0.35);
}

/* 文章头部 */
.article-header {
  margin-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 36px;
}

.article-category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(20, 184, 166, 0.1);
  border: 1px solid rgba(13, 148, 136, 0.25);
  color: var(--color-brand-primary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
}

.article-title-main {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.28;
  color: var(--color-text-title);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.86rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 文章主体布局：双栏 (内容区 + 侧边栏/TOC) */
.article-layout-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

/* 文章正文 (纯白柔光卡片) */
.article-content {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 4px 20px rgba(13, 148, 136, 0.05);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text-main);
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--color-text-title);
  margin-top: 42px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(13, 148, 136, 0.16);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content h2::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 22px;
  background: var(--grad-brand);
  border-radius: 3px;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-brand-primary);
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-content p {
  margin-bottom: 22px;
}

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

.article-content li {
  margin-bottom: 8px;
}

.article-content strong {
  color: var(--color-text-title);
}

/* 警示与提示框 */
.article-callout {
  background: rgba(240, 253, 250, 0.9);
  border-left: 4px solid var(--color-brand-mint);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 18px 22px;
  margin: 28px 0;
  border-top: 1px solid rgba(13, 148, 136, 0.08);
  border-right: 1px solid rgba(13, 148, 136, 0.08);
  border-bottom: 1px solid rgba(13, 148, 136, 0.08);
}

.article-callout.warning {
  background: rgba(254, 243, 199, 0.6);
  border-left-color: var(--color-brand-accent);
  border-color: rgba(245, 158, 11, 0.2);
}

.callout-title {
  font-weight: 700;
  color: var(--color-text-title);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 数据与对比表格 */
.article-table-wrapper {
  overflow-x: auto;
  margin: 30px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

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

.article-table th {
  background: rgba(204, 251, 241, 0.55);
  color: var(--color-brand-deep);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
}

.article-table td {
  padding: 12px 18px;
  border-bottom: 1px solid rgba(13, 148, 136, 0.08);
  color: var(--color-text-main);
}

.article-table tr:nth-child(even) {
  background: rgba(240, 253, 250, 0.4);
}

/* 文章内部注册号召卡片 */
.article-cta-box {
  background: linear-gradient(135deg, #f0fdf9 0%, #ccfbf1 50%, #e6fcf5 100%);
  border: 1.5px solid rgba(13, 148, 136, 0.25);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin: 42px 0 24px 0;
  box-shadow: 0 12px 35px rgba(13, 148, 136, 0.08), var(--shadow-glow);
}

.article-cta-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-text-title);
  margin-bottom: 10px;
}

.article-cta-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 22px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* 侧边栏与目录 (TOC) */
.article-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 20px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.toc-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(14px);
  box-shadow: 0 4px 16px rgba(13, 148, 136, 0.05);
}

.toc-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-title);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-item a {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  display: block;
  padding: 4px 0 4px 8px;
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
}

.toc-item a:hover, .toc-item a.active {
  color: var(--color-brand-primary);
  border-left-color: var(--color-brand-mint);
  padding-left: 12px;
}

.related-articles-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(14px);
  box-shadow: 0 4px 16px rgba(13, 148, 136, 0.05);
}

.related-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-title);
  margin-bottom: 14px;
}

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

.related-link {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  transition: color var(--transition-fast);
}

.related-link:hover {
  color: var(--color-brand-primary);
}

/* 响应式文章页 */
@media (max-width: 1024px) {
  .article-layout-grid {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .article-title-main {
    font-size: 1.85rem;
  }
  .article-content {
    padding: 28px 20px;
  }
}