.article-body h2 {
  position: relative;
  margin: 64px 0 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  color: var(--navy);
  font-family: "Noto Serif JP", serif;
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.article-body h2::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--gold);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  margin: 38px 0 16px;
  color: var(--navy);
  font-family: "Noto Serif JP", serif;
  font-size: 1.08rem;
  font-weight: 500;
  line-height: 1.7;
  letter-spacing: 0.03em;
}

.article-body .article-conclusion h2::after {
  content: none;
}

.article-toc {
  margin: 0 0 48px;
  padding: 24px 28px;
  border: 1px solid var(--border);
  background: var(--warm-white, var(--off-white, #faf8f4));
}

.article-toc__title {
  margin: 0 0 14px !important;
  color: var(--navy);
  font-family: var(--serif, "Noto Serif JP", serif);
  font-size: 0.95rem !important;
  font-weight: 500;
  line-height: 1.7 !important;
  letter-spacing: 0.08em;
}

.article-toc__list {
  margin: 0;
  padding-left: 1.5em;
  list-style-type: decimal;
  list-style-position: outside;
}

.article-toc__list li {
  display: list-item;
  padding-left: 0.2em;
  color: var(--text-mid, var(--text-secondary, #141d2b));
  font-size: 0.95rem;
  line-height: 1.8;
}

.article-toc__list li + li {
  margin-top: 10px;
}

.article-body .article-toc__list a,
.article-body .article-toc__list a:visited {
  color: var(--text-mid, var(--text-secondary, #141d2b));
  text-decoration: none;
}

.article-body .article-toc__list a:hover,
.article-body .article-toc__list a:focus-visible {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body .article-toc__list a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.article-body h2[id] {
  scroll-margin-top: 96px;
}

@media (max-width: 680px) {
  .article-body h2 {
    font-size: 1.2rem;
  }

  .article-toc {
    margin-bottom: 40px;
    padding: 20px 18px;
  }

  .article-toc__list {
    padding-left: 1.3em;
  }
}

/* Conclusion summary: shared format across Yohaku column sites */
.article-body .article-conclusion {
  margin: 0 0 40px;
  padding: 24px 28px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--gold);
  background: var(--off-white);
}

.article-body .article-conclusion h2 {
  position: relative;
  margin: 0 0 24px;
  padding: 0 0 14px;
  border: 0;
  border-bottom: 1px solid var(--border);
  color: var(--navy);
  font-family: var(--serif, "Noto Serif JP", serif);
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.article-body .article-conclusion h2::after {
  content: none;
}

.article-body .article-conclusion p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
}

.article-body .article-conclusion p + p {
  margin-top: 14px;
}

@media (max-width: 680px) {
  .article-body .article-conclusion {
    padding: 20px;
  }

  .article-body .article-conclusion h2 {
    font-size: 1.2rem;
  }
}