.article-heading { max-width: 1000px; padding: 42px 0 0; }
.article-category { margin: 32px 0 16px; color: var(--brand-primary); font-size: 13px; }
.article-heading h1 { font-size: clamp(36px, 4.6vw, 60px); line-height: 1.08; letter-spacing: -.045em; max-width: 940px; margin: 0 0 22px; }
.article-deck { font-size: 22px; line-height: 1.5; color: var(--muted); max-width: 820px; margin: 0 0 20px; }
.article-byline { display: flex; gap: 10px; flex-wrap: wrap; font-size: 14px; margin: 0 0 30px; color: var(--muted); }
.article-byline a { color: var(--ink); }
.article-answer { padding: 22px 26px; background: #f1f6fe; border-left: 3px solid var(--brand-primary); max-width: 930px; }
.article-answer p { margin: 0; font-size: 18px; line-height: 1.7; }
.article-layout { padding-top: 42px; }
.article-layout .guide-body { max-width: 760px; }
.article-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; border-block: 1px solid var(--line); padding: 24px 0; margin: 26px 0; }
.article-facts strong { display: block; font-size: 29px; font-weight: 600; letter-spacing: -.035em; }
.article-facts span { display: block; font-size: 14px; color: var(--muted); }
.article-calculation { border: 1px solid var(--line); border-radius: 12px; padding: 24px; margin: 24px 0; }
.article-calculation > span { font-size: 12px; letter-spacing: .07em; font-weight: 600; color: var(--muted); }
.article-calculation p { font-size: clamp(19px, 2.3vw, 26px); line-height: 1.5; margin: 10px 0 0; }
.article-calculation strong { color: var(--brand-primary); white-space: nowrap; }
.article-calculation-primary { background: #f1f6fe; border-color: #bdd2f7; }
.article-sample { margin: 24px 0; padding: 24px 26px; border-left: 3px solid var(--brand-primary); background: #f6f8fc; }
.article-sample p { margin: 0; }
.guide-table caption { text-align: left; font-size: 15px; font-weight: 600; padding: 14px 16px; background: #fff; }
.article-author { display: flex; gap: 18px; border-top: 1px solid var(--line); padding-top: 28px; margin-top: 40px; }
.article-author > img { flex: none; border-radius: 10px; }
.article-author h2 { margin: 0 0 8px; font-size: 19px; }
.article-author p { font-size: 15px; line-height: 1.7; color: var(--muted); }
.article-toc-note { font-size: 14px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; margin-top: 14px; }
@media (max-width: 850px) {
  .article-layout .guide-toc ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
  .article-toc-note { display: none; }
}
@media (max-width: 760px) {
  .article-heading { padding-top: 28px; }
  .article-category { margin-top: 24px; }
  .article-deck { font-size: 19px; }
  .article-answer { padding: 18px 20px; }
  .article-answer p { font-size: 17px; }
  .article-facts { gap: 10px; }
  .article-facts strong { font-size: 24px; }
  .article-calculation { padding: 18px; }
  .article-sample { padding: 20px; }
  .article-layout .guide-table { min-width: 0; table-layout: fixed; font-size: 15px; }
  .article-layout .guide-table th, .article-layout .guide-table td { padding: 12px 6px; }
  .article-layout .guide-table th:first-child { width: 49%; }
  .article-layout .guide-table th:nth-child(2) { width: 32%; }
  .article-layout .guide-table th:last-child { width: 19%; }
}
@media (max-width: 350px) {
  .article-facts { grid-template-columns: 1fr; }
  .article-layout .guide-toc ol { grid-template-columns: 1fr; }
}