/* ==========================================================================
   文章与独立页面通用排版样式表 (article.css)
   Typography-First Reading Layout for Knowledge Base & Standalone Pages
   Colors: White #FFFFFF, Dark Slate #34424B, Mist Blue #C9DEE7, Muted Lilac #A8A0BC
   ========================================================================== */

.page-wrapper {
  padding-top: 40px;
  padding-bottom: 90px;
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
  margin-bottom: 28px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  font-size: 13px;
  color: var(--color-slate-muted);
}

.breadcrumb-item a {
  color: var(--color-slate-muted);
}

.breadcrumb-item a:hover {
  color: var(--color-dark-slate);
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--color-mist-blue);
  user-select: none;
}

.breadcrumb-item.is-current {
  color: var(--color-dark-slate);
  font-weight: 500;
}

/* Article Container */
.article-container {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
  background-color: var(--color-white);
}

/* Article Header */
.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}

.article-header-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--color-slate-muted);
}

.article-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  background-color: var(--color-mist-blue-bg);
  border: 1px solid var(--color-mist-blue);
  font-weight: 500;
  color: var(--color-dark-slate);
}

.article-h1 {
  font-family: var(--font-heading);
  font-weight: 300;
  font-size: 36px;
  line-height: 1.28;
  color: var(--color-dark-slate);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .article-h1 {
    font-size: 44px;
  }
}

.article-lead {
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-slate-muted);
  background: var(--color-mist-blue-bg);
  border-left: 3px solid var(--color-dark-slate);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Article Body Typography */
.article-body {
  font-size: 16px;
  line-height: 1.82;
  color: var(--color-dark-slate);
}

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

.article-body h2 {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 26px;
  line-height: 1.35;
  color: var(--color-dark-slate);
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.4;
  color: var(--color-dark-slate);
  margin-top: 32px;
  margin-bottom: 14px;
}

.article-body ul, 
.article-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--color-slate-muted);
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-body strong {
  color: var(--color-dark-slate);
  font-weight: 600;
}

/* Callouts / Alert Boxes */
.article-callout {
  background-color: #FAFDFE;
  border: 1px solid var(--color-mist-blue);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 28px 0;
}

.article-callout.callout-lilac {
  background-color: var(--color-muted-lilac-bg);
  border-color: rgba(168, 160, 188, 0.5);
}

.callout-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark-slate);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-text {
  font-size: 14px;
  color: var(--color-slate-muted);
  line-height: 1.65;
  margin-bottom: 0 !important;
}

/* Tables inside Articles */
.article-table-wrapper {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  text-align: left;
}

.article-table th,
.article-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
}

.article-table th {
  background-color: var(--color-mist-blue-bg);
  font-weight: 600;
  color: var(--color-dark-slate);
}

.article-table tr:last-child td {
  border-bottom: none;
}

/* Code Snippets */
.article-code-block {
  background: #2D3748;
  color: #EDF2F7;
  padding: 18px;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
  margin: 24px 0;
}

/* Step list */
.step-list {
  list-style: none;
  padding-left: 0;
  margin: 28px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #FAFDFE;
  border: 1px solid var(--color-border);
  padding: 16px 18px;
  border-radius: var(--radius-sm);
}

.step-num {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: var(--color-dark-slate);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}

.step-content h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark-slate);
  margin-bottom: 6px;
}

.step-content p {
  margin-bottom: 0 !important;
  font-size: 14px;
  color: var(--color-slate-muted);
}

/* Article In-Page FAQ */
.article-faq-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

/* In-Article CTA Banner */
.article-cta-box {
  margin: 40px 0;
  padding: 32px 28px;
  background: var(--color-mist-blue-bg);
  border: 1px solid var(--color-mist-blue);
  border-radius: var(--radius-md);
  text-align: center;
}

.article-cta-box h3 {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 22px;
  color: var(--color-dark-slate);
  margin-top: 0;
  margin-bottom: 10px;
}

.article-cta-box p {
  font-size: 15px;
  color: var(--color-slate-muted);
  max-width: 580px;
  margin: 0 auto 20px auto;
}

/* Related Articles Block */
.related-articles-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--color-border);
}

.related-title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 22px;
  color: var(--color-dark-slate);
  margin-bottom: 22px;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.related-card {
  padding: 18px 20px;
  background-color: #FAFDFE;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
}

.related-card:hover {
  border-color: var(--color-dark-slate);
  background-color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-subtle);
}

.related-card-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-dark-slate);
  margin-bottom: 6px;
  line-height: 1.45;
}

.related-card-desc {
  font-size: 13px;
  color: var(--color-slate-muted);
  line-height: 1.6;
}