.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
  margin-bottom: 24px;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span[aria-current] { color: var(--ink); font-weight: 600; }

.article-header {
  padding-top: 48px;
  max-width: 820px;
}
.article-tag {
  display: inline-block;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.article-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.3;
  margin: 0 0 18px;
  font-weight: 800;
}
.article-sub {
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: 0 0 20px;
}
.article-meta {
  display: flex;
  gap: 18px;
  color: var(--ink-soft);
  font-size: 0.85rem;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.article-banner {
  margin: 32px auto 0;
}
.banner-illustration {
  position: relative;
  height: 220px;
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.banner-shape {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
}
.shape-1 { width: 220px; height: 220px; top: -80px; left: -60px; }
.shape-2 { width: 160px; height: 160px; bottom: -70px; right: -30px; }
.banner-icon {
  font-size: 4rem;
  position: relative;
  z-index: 1;
}

.article-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  padding: 48px 0 90px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.toc-title {
  margin: 0 0 4px;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.toc a {
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.toc a:hover { color: var(--primary); }

.article-content { max-width: 760px; }
.article-content.standalone { margin: 0 auto; }
.about-intro { padding: 20px 0 70px; }
.articles-list { padding: 20px 0 100px; }
.article-content section { margin-bottom: 44px; }
.article-content h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0 0 16px;
  scroll-margin-top: 100px;
}
.article-content p { color: var(--ink-soft); margin: 0 0 14px; }
.article-content strong { color: var(--ink); }

.article-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.article-list li {
  position: relative;
  padding-left: 22px;
  color: var(--ink-soft);
}
.article-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

.note-inline {
  font-size: 0.85rem;
  color: var(--ink-soft);
  opacity: 0.85;
}

.info-box {
  background: var(--primary-light);
  border: 1px solid #ffd9c4;
  border-radius: var(--radius-md);
  padding: 18px 20px;
  color: var(--ink);
  font-size: 0.92rem;
}
.info-box strong { color: var(--primary-dark); }

.article-content .faq-list { margin-top: 8px; }

.disclaimer-box {
  margin-top: 48px;
  padding: 20px 22px;
  background: var(--bg-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.disclaimer-box strong { color: var(--ink); }

.article-cta {
  margin-top: 40px;
  text-align: center;
}

@media (max-width: 860px) {
  .article-body { grid-template-columns: 1fr; }
  .toc {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .toc-title { width: 100%; }
}

/* Article hub (knowledge base listing) */
.article-hub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.article-preview-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.article-preview-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}
.article-preview-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.article-preview-card h3 { margin: 0 0 10px; font-size: 1.1rem; }
.article-preview-card p { color: var(--ink-soft); font-size: 0.9rem; margin: 0 0 18px; }
.article-preview-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.article-preview-meta span { font-size: 0.8rem; color: var(--ink-soft); }
.article-preview-meta a { font-weight: 700; color: var(--primary-dark); font-size: 0.88rem; }
.article-preview-meta a:hover { color: var(--primary); }

@media (max-width: 760px) {
  .article-hub-grid { grid-template-columns: 1fr; }
}