/* ============================================================
   article.css — 記事個別ページ共通スタイル
   ============================================================ */

.article-hero {
  padding-top: calc(64px + clamp(3rem, 6vw, 5rem));
  padding-bottom: clamp(2rem, 4vw, 3rem);
  background: var(--white);
  border-bottom: 1px solid var(--border-light);
}
.article-hero-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.article-category {
  display: inline-block;
  font-size: .68rem;
  letter-spacing: .14em;
  padding: .2rem .8rem;
  border-radius: 2px;
  font-weight: 500;
  margin-bottom: 1.2rem;
}
.article-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 300;
  color: var(--navy);
  line-height: 1.45;
  margin-bottom: 1.2rem;
}
.article-meta {
  font-size: .75rem;
  color: var(--muted);
  font-weight: 300;
  letter-spacing: .06em;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* ── 本文ラッパー ── */
.article-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.5rem) var(--pad-x) clamp(3rem, 8vw, 6rem);
}
.article-body {}
.article-lead {
  font-size: clamp(.98rem, 1.5vw, 1.06rem);
  color: var(--text-mid);
  font-weight: 300;
  line-height: 2;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-light);
}
.article-body h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 300;
  color: var(--navy);
  margin: clamp(2.5rem, 5vw, 3.5rem) 0 1rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--border-light);
  line-height: 1.5;
}
.article-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(.98rem, 1.6vw, 1.1rem);
  font-weight: 400;
  color: var(--navy);
  margin: 2rem 0 .7rem;
}
.article-body p {
  font-size: clamp(.92rem, 1.4vw, 1rem);
  color: var(--text);
  font-weight: 300;
  line-height: 2;
  margin-bottom: 1.1rem;
}
.article-body strong { font-weight: 500; color: var(--navy); }

/* ── 関連記事 ── */
.article-related {
  margin-top: clamp(3rem, 6vw, 5rem);
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
}
.article-related-title {
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 1rem;
}
.related-links { display: flex; flex-direction: column; gap: .5rem; }
.related-link {
  display: flex;
  align-items: center;
  gap: .8rem;
  padding: .85rem 1.1rem;
  border: 1px solid var(--border-light);
  background: var(--white);
  font-size: clamp(.84rem, 1.2vw, .9rem);
  color: var(--navy);
  font-weight: 300;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.related-link:hover {
  border-color: var(--blue-light);
  box-shadow: var(--shadow-sm);
  color: var(--blue);
}
.related-link-cat {
  font-size: .64rem;
  letter-spacing: .1em;
  color: var(--blue);
  background: rgba(74,144,184,.08);
  padding: .15rem .55rem;
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
}
.related-link-arrow { margin-left: auto; color: var(--blue); flex-shrink: 0; }

@media (max-width: 640px) {
  .related-link { flex-wrap: wrap; gap: .5rem; }
  .related-link-arrow { display: none; }
}

/* ══════════════════════════════════════════
   ファネル導線 CSS
   ══════════════════════════════════════════ */

/* ── 記事内 中間CTA（本文途中） ── */
.article-mid-cta {
  margin: 2.5rem 0;
  padding: 1.2rem 1.6rem;
  background: var(--off-white);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.article-mid-cta-text {
  font-size: clamp(.84rem, 1.2vw, .9rem);
  color: var(--text-mid);
  font-weight: 300;
  line-height: 1.6;
}
.article-mid-cta-text strong {
  display: block;
  font-size: clamp(.88rem, 1.3vw, .94rem);
  color: var(--navy);
  font-weight: 500;
  margin-bottom: .2rem;
}
.article-mid-cta-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .82rem;
  color: var(--blue);
  border: 1px solid var(--blue-light);
  padding: .5rem 1.1rem;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.article-mid-cta-link:hover {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

/* ── 記事末 ページCTA（LP戻し） ── */
.article-page-cta {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding: clamp(1.8rem, 4vw, 2.8rem) clamp(1.4rem, 3vw, 2.2rem);
  background: var(--navy);
  text-align: center;
}
.article-page-cta-label {
  font-size: .68rem;
  letter-spacing: .16em;
  color: rgba(255,255,255,.35);
  font-weight: 500;
  margin-bottom: .8rem;
}
.article-page-cta-title {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 300;
  color: var(--white);
  line-height: 1.5;
  margin-bottom: 1.4rem;
}
.article-page-cta-btns {
  display: flex;
  gap: .8rem;
  justify-content: center;
  flex-wrap: wrap;
}
.article-page-cta .btn-primary {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
}
.article-page-cta .btn-primary:hover {
  background: var(--blue-pale);
  border-color: var(--blue-pale);
}
.article-page-cta .btn-outline {
  border-color: rgba(255,255,255,.3);
  color: rgba(255,255,255,.8);
}
.article-page-cta .btn-outline:hover {
  border-color: var(--white);
  color: var(--white);
}

/* ── コラム一覧 LP戻しバナー ── */
.col-lp-banner {
  background: var(--off-white);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--blue);
  padding: 1.4rem 2rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  flex-wrap: wrap;
}
.col-lp-banner-text {
  font-size: clamp(.88rem, 1.3vw, .95rem);
  color: var(--text-mid);
  font-weight: 300;
  line-height: 1.7;
}
.col-lp-banner-text strong {
  display: block;
  color: var(--navy);
  font-weight: 500;
  margin-bottom: .2rem;
}
.col-lp-banner-links {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
  flex-shrink: 0;
}
.col-lp-banner-link {
  font-size: .8rem;
  padding: .45rem 1rem;
  border: 1px solid var(--border);
  color: var(--text-mid);
  white-space: nowrap;
  transition: border-color var(--transition), color var(--transition);
}
.col-lp-banner-link:hover { border-color: var(--blue); color: var(--blue); }
.col-lp-banner-link.primary {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}
.col-lp-banner-link.primary:hover {
  background: var(--blue-mid);
  border-color: var(--blue-mid);
}

@media (max-width: 640px) {
  .article-mid-cta { flex-direction: column; align-items: flex-start; }
  .article-page-cta-btns { flex-direction: column; align-items: center; }
  .col-lp-banner { flex-direction: column; }
}

/* ── SSOT構成セクション（①〜⑤） ── */
.ssot-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  font-size: .65rem;
  font-weight: 500;
  margin-right: .4rem;
  flex-shrink: 0;
  font-family: var(--font-body);
  vertical-align: middle;
}
.ssot-section { margin: 2rem 0; padding: 1.4rem 1.6rem; }
.ssot-section h2 {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  margin: 0 0 .8rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
}
.ssot-section--source {
  background: rgba(74,144,184,.05);
  border: 1px solid rgba(74,144,184,.15);
  border-left: 4px solid var(--blue-light);
}
.ssot-section--source .ssot-num { background: var(--blue-pale); color: var(--blue); }
.ssot-section--source h2 { color: var(--blue); }
.ssot-section--limit {
  background: var(--off-white);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--muted);
}
.ssot-section--limit .ssot-num { background: rgba(0,0,0,.06); color: var(--muted); }
.ssot-section--limit h2 { color: var(--text-mid); }
.ssot-limit-item {
  font-size: clamp(.86rem, 1.3vw, .92rem);
  color: var(--text-mid);
  font-weight: 300;
  line-height: 1.8;
  margin-bottom: .3rem;
  padding-left: .4rem;
}
.ssot-section--wezu {
  background: var(--navy);
  border: none;
}
.ssot-section--wezu .ssot-num { background: rgba(255,255,255,.15); color: rgba(255,255,255,.7); }
.ssot-section--wezu h2 { color: rgba(255,255,255,.55); border-color: rgba(255,255,255,.15); }
.ssot-section--wezu p {
  color: rgba(255,255,255,.75);
  font-size: clamp(.88rem, 1.3vw, .94rem);
  font-weight: 300;
  line-height: 1.9;
}
/* ③見出しのカラーリング */
.article-body h2 .ssot-num {
  background: var(--blue-pale);
  color: var(--blue);
}
@media (max-width: 640px) {
  .ssot-section { padding: 1.1rem 1.2rem; }
}