/* Shared article chrome · uses hub CSS variables */
.article-shell .lang-switch {
  position: fixed;
  top: 1rem;
  right: 1.5rem;
  z-index: 200;
}
.ob-article { max-width: 42rem; margin: 0 auto; padding: 5.5rem 1.5rem 3.5rem; }
.ob-article .ob-back {
  display: inline-block;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
}
.ob-article .ob-back:hover { color: var(--text); }
.ob-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}
.ob-article h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.55rem, 3.5vw, 2rem);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.ob-meta { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 1.75rem; }
.ob-article h2 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin: 1.85rem 0 0.7rem;
  color: var(--text);
}
.ob-article p,
.ob-article li {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.8;
}
.ob-article p { margin-bottom: 1rem; }
.ob-article ul, .ob-article ol { padding-left: 1.2rem; margin: 0 0 1rem; }
.ob-article li { margin-bottom: 0.4rem; }
.ob-pull {
  margin: 1.35rem 0;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.65);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.65;
}
.ob-canon {
  margin: 1rem 0 1.25rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.7);
}
.ob-canon strong {
  color: var(--text);
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}
.ob-canon ul { margin: 0; }
.ob-cta { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.65rem; }
.ob-note {
  margin-top: 1.75rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.article-body-en[hidden],
.article-body-zh[hidden] { display: none !important; }