.catalog-page > .article-opening {
  background: #f0f5fa;
  padding: 24px 0 30px;
}
.article-breadcrumbs {
  font-size: 13px;
  color: #526176;
  margin-bottom: 22px;
}
.article-breadcrumbs a:hover {
  text-decoration: underline;
}
.article-intro {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 38px;
  align-items: center;
}
.article-category {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #2457d6;
}
.article-intro h1 {
  font-size: 36px;
  line-height: 1.16;
  letter-spacing: -0.025em;
  margin: 12px 0 14px;
  text-transform: none;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: #526176;
}
.article-summary {
  font-size: 17px;
  line-height: 1.6;
  margin: 16px 0;
  color: #425672;
  max-width: 570px;
}
.article-preview {
  font-size: 12px;
  color: #5c6a7d;
}
.article-cover {
  aspect-ratio: 16/10;
  background: #dfe7ef;
  border-radius: 3px;
}
.catalog-page > .article-reading {
  padding: 28px 0;
}
.article-reading-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 760px);
  gap: 38px;
  justify-content: center;
  align-items: start;
}
.article-toc {
  position: sticky;
  top: 100px;
  background: #f6f8fb;
  border: 1px solid #dfe7ef;
  border-radius: 3px;
  padding: 18px;
}
.article-toc nav {
  display: block;
  position: static;
  padding: 0;
  max-height: none;
  background: none;
}
.article-toc h2 {
  font-size: 16px;
  line-height: 1.4;
  margin: 0 0 14px;
  letter-spacing: normal;
}
.article-toc a {
  display: block;
  color: #2457d6;
  font-size: 14px;
  line-height: 1.5;
  margin: 12px 0;
}
.article-toc a:hover {
  text-decoration: underline;
}
.article-content {
  min-width: 0;
}
.article-content section {
  margin: 0 0 26px;
  scroll-margin-top: 100px;
}
.article-content section:last-child {
  margin-bottom: 0;
}
.article-content h2 {
  font-size: 24px;
  line-height: 1.3;
  margin: 0 0 12px;
  text-transform: none;
}
.article-content h3 {
  font-size: 20px;
}
.article-content p,
.article-content li {
  font-size: 16px;
  line-height: 1.7;
  color: #425672;
}
.article-content p {
  margin: 0 0 14px;
}
.article-content ul {
  padding-left: 22px;
  margin: 14px 0;
}
.article-content li {
  margin: 5px 0;
}
.article-content li::marker {
  color: #2457d6;
}
.article-table {
  overflow: auto;
  margin: 18px 0;
}
.article-table table {
  width: 100%;
  border-collapse: collapse;
  min-width: 400px;
  font-size: 14px;
  text-align: left;
}
.article-table th,
.article-table td {
  padding: 11px 14px;
  border: 1px solid #d8e1ec;
}
.article-table th {
  background: #eaf0fa;
  font-weight: 600;
}
.article-table td {
  color: #425672;
}
.article-inline-media {
  background: #dfe7ef;
  aspect-ratio: 16/5;
  margin: 16px 0 0;
  border-radius: 3px;
}
.article-inquiry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: #f0f5fa;
  padding: 18px;
  border-radius: 3px;
  font-size: 14px;
}
.article-inquiry .button {
  flex-shrink: 0;
}
.catalog-page > .article-related {
  background: #f6f8fb;
  padding: 28px 0;
}
.catalog-page > .article-recommendations {
  padding: 28px 0 36px;
}
.article-related h2,
.article-recommendations h2 {
  font-size: 26px;
  margin: 0 0 18px;
}
.article-section-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 18px;
}
.article-section-heading h2 {
  margin: 0;
}
.article-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.article-card {
  display: block;
  background: white;
  border: 1px solid #dfe7ef;
  border-radius: 3px;
  transition:
    transform 0.18s,
    box-shadow 0.18s;
}
.article-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px #101b2d0d;
}
.article-card-media {
  aspect-ratio: 16/7;
  background: #dfe7ef;
  border-radius: 2px 2px 0 0;
}
.article-card > div:last-child {
  padding: 14px;
}
.article-card h3 {
  font-size: 17px;
  line-height: 1.4;
  margin: 6px 0 10px;
}
.article-card .link {
  font-size: 14px;
}
.article-card:focus-visible,
.article-toc a:focus-visible {
  outline: 2px solid #2457d6;
  outline-offset: 3px;
}
@media (max-width: 900px) {
  .article-reading-grid {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 24px;
  }
  .article-intro {
    gap: 24px;
  }
  .article-intro h1 {
    font-size: 30px;
  }
}
@media (max-width: 750px) {
  .article-intro {
    grid-template-columns: 1fr;
    min-width: 0;
  }
  .article-intro > div,
  .article-intro h1,
  .article-summary,
  .article-cover {
    min-width: 0;
    max-width: 100%;
  }
  .article-intro h1,
  .article-summary {
    overflow-wrap: anywhere;
  }
  .article-cover {
    aspect-ratio: 16/9;
    width: 100%;
  }
  .article-intro h1 {
    font-size: 28px;
  }
  .article-summary {
    font-size: 16px;
  }
  .article-reading-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .article-toc {
    position: static;
  }
  .article-content h2 {
    font-size: 22px;
  }
  .article-inquiry {
    align-items: flex-start;
    flex-direction: column;
  }
  .article-card-grid {
    grid-template-columns: 1fr;
  }
  .article-section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
  .article-related h2,
  .article-recommendations h2 {
    font-size: 23px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .article-card {
    transition: none;
  }
  .article-card:hover {
    transform: none;
  }
}
/* Keep article navigation independent from the shared header's mobile menu. */
.article-toc nav {
  width: auto;
  overflow: visible;
  inset: auto;
  font-weight: 400;
}
@media (max-width: 750px) {
  .article-toc {
    padding: 12px 16px;
  }
  .article-toc nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
  }
  .article-toc h2 {
    margin: 0 0 6px;
    font-size: 16px;
  }
  .article-toc a {
    display: flex;
    align-items: center;
    min-height: 40px;
    margin: 0;
    padding: 8px 0;
    font-size: 14px;
    line-height: 1.4;
  }
  .article-reading-grid {
    gap: 20px;
  }
}