.article-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 200;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.article-page {
  background: #f7fbff;
}

.article-page .site-header {
  background: rgba(247, 251, 255, 0.9);
}

.article-hero,
.articles-hero {
  padding: calc(var(--nav-height) + 64px) 0 56px;
  background:
    radial-gradient(circle at 85% 15%, rgba(14, 165, 233, 0.13), transparent 28%),
    linear-gradient(180deg, #edf7ff 0%, #f7fbff 100%);
  border-bottom: 1px solid var(--border-light);
}

.article-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  color: var(--text-muted);
  font-size: 0.84rem;
}

.article-breadcrumb span {
  color: #9bb0c5;
}

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
}

.article-hero h1,
.articles-hero h1 {
  max-width: 900px;
  margin: 18px 0 18px;
  color: var(--primary-dark);
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

@media (min-width: 961px) {
  html[lang="zh-CN"] .articles-hero h1 {
    max-width: none;
    font-size: clamp(2.35rem, 4.2vw, 3rem);
    white-space: nowrap;
  }
}

.article-lead,
.articles-lead {
  max-width: 780px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 1.08rem;
  line-height: 1.85;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 24px;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.article-main {
  padding: 56px 0 88px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(220px, 1fr);
  gap: 56px;
  align-items: start;
}

.article-content {
  min-width: 0;
  color: #29445f;
  font-size: 1rem;
  line-height: 1.9;
}

.article-content h2 {
  margin: 52px 0 18px;
  padding-top: 8px;
  color: var(--primary-dark);
  font-size: 1.65rem;
  line-height: 1.35;
}

.article-content h3 {
  margin: 32px 0 12px;
  color: var(--primary-dark);
  font-size: 1.18rem;
}

.article-content p {
  margin: 0 0 18px;
}

.article-content ul,
.article-content ol {
  margin: 0 0 22px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 9px;
}

.article-content strong {
  color: #173a5e;
}

.article-content code {
  padding: 2px 6px;
  border: 1px solid #dceaf7;
  border-radius: 5px;
  background: #eef6fd;
  color: #164e84;
  font-size: 0.88em;
}

.article-content pre {
  overflow-x: auto;
  margin: 22px 0;
  padding: 20px;
  border-radius: 12px;
  background: #102844;
  color: #dcecff;
  font: 0.88rem/1.7 "SF Mono", "Fira Code", monospace;
}

.article-content pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
}

.article-callout {
  margin: 26px 0;
  padding: 20px 22px;
  border: 1px solid #bfdbfe;
  border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0;
  background: #eff7ff;
}

.article-callout.warning {
  border-color: #fed7aa;
  border-left-color: #f97316;
  background: #fff8ed;
}

.article-callout p:last-child {
  margin-bottom: 0;
}

.article-checklist {
  padding: 0 !important;
  list-style: none;
}

.article-checklist li {
  position: relative;
  padding-left: 28px;
}

.article-checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #059669;
  font-weight: 800;
}

.article-steps {
  counter-reset: article-step;
  display: grid;
  gap: 16px;
  margin: 24px 0 30px;
}

.article-step {
  position: relative;
  padding: 20px 20px 20px 66px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
}

.article-step::before {
  counter-increment: article-step;
  content: counter(article-step);
  position: absolute;
  top: 20px;
  left: 20px;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
}

.article-step h3 {
  margin: 0 0 6px;
}

.article-step p:last-child {
  margin-bottom: 0;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 0.9rem;
}

.article-table th,
.article-table td {
  padding: 13px 15px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.article-table th {
  background: #edf6ff;
  color: var(--primary-dark);
}

.article-toc {
  position: sticky;
  top: calc(var(--nav-height) + 28px);
  padding: 22px;
  border: 1px solid var(--border-light);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.article-toc strong {
  display: block;
  margin-bottom: 12px;
  color: var(--primary-dark);
}

.article-toc ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
}

.article-toc a {
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.article-toc a:hover,
.article-toc a.active {
  color: var(--primary);
}

.article-faq {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.article-faq details {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.article-faq summary {
  cursor: pointer;
  color: var(--primary-dark);
  font-weight: 700;
}

.article-faq details p {
  margin: 12px 0 0;
  color: var(--text-secondary);
}

.article-cta {
  margin-top: 50px;
  padding: 30px;
  border-radius: 18px;
  background: linear-gradient(135deg, #163b60, #1d4f7d);
  color: #fff;
}

.article-cta h2 {
  margin: 0 0 10px;
  padding: 0;
  color: #fff;
}

.article-cta p {
  color: rgba(255, 255, 255, 0.76);
}

.article-cta .btn {
  margin: 4px 10px 0 0;
}

.related-articles {
  padding: 64px 0;
  border-top: 1px solid var(--border-light);
  background: #fff;
}

.related-articles h2 {
  margin: 0 0 24px;
  color: var(--primary-dark);
  font-size: 1.5rem;
}

.related-grid,
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--border-light);
  border-radius: 16px;
  background: #fff;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--border);
  box-shadow: var(--shadow-md);
}

.article-card .card-icon {
  margin-bottom: 18px;
  font-size: 1.65rem;
}

.article-card .card-category {
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 800;
}

.article-card h2,
.article-card h3 {
  margin: 8px 0 10px;
  color: var(--primary-dark);
  font-size: 1.08rem;
  line-height: 1.45;
}

.article-card p {
  flex: 1;
  margin: 0 0 18px;
  color: var(--text-secondary);
  font-size: 0.86rem;
  line-height: 1.65;
}

.article-card .card-more {
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
}

.articles-main {
  padding: 64px 0 90px;
}

.articles-filter-note {
  max-width: 720px;
  margin: 0 0 32px;
  color: var(--text-secondary);
}

.articles-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .article-toc {
    position: static;
    order: -1;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .article-hero,
  .articles-hero {
    padding-top: calc(var(--nav-height) + 40px);
  }

  .article-main {
    padding-top: 36px;
  }

  .article-step {
    padding: 62px 18px 18px;
  }

  .article-step::before {
    top: 18px;
    left: 18px;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }
}