.about-hero { display: grid; grid-template-columns: 1.7fr 1fr; align-items: center; gap: clamp(30px,5vw,72px); padding-block: 70px 64px; }
.about-hero h1 { font-size: clamp(44px,5.2vw,70px); line-height: 1.08; margin-block: 22px 30px; text-wrap: balance; }
.about-intro { font-size: 18px; color: var(--muted); max-width: 47ch; }
.about-links { display: flex; flex-wrap: wrap; gap: 18px 30px; margin-top: 30px; }
.about-portrait { margin: 0; }
.about-portrait img { border-radius: var(--radius-panel); }
.about-portrait figcaption { font-family: var(--hand); font-size: 22px; margin: 14px 4px 0; color: var(--muted); transform: rotate(-2deg); }
.about-origin { display: grid; grid-template-columns: 1fr 2fr; gap: 42px; border-block: 1px solid var(--line); padding-block: 35px; }
.about-origin h2 { font-size: 30px; line-height: 1.2; margin-bottom: 15px; }
.about-origin p { color: var(--muted); max-width: 64ch; }
.about-chapter { display: grid; grid-template-columns: 1fr 2fr; gap: 42px; padding-block: 65px; border-bottom: 1px solid var(--line); }
.about-section-nav { position: static; margin: 0; padding: 0 0 28px; border: 0; }
.about-section-nav .case-toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.about-section-nav .case-toc a { min-height: 44px; padding: 10px 14px; border: 1px solid var(--line); border-radius: var(--radius-control); gap: 8px; }
.about-section-nav .case-toc a[aria-current='location'] { padding-left: 14px; border: 1px solid var(--accent); background: var(--surface); }
.about-chapter-label { padding-top: 8px; }
.about-chapter-label p { font-size: 16px; margin-top: 10px; }
.about-chapter-label > span:last-child { display: block; color: var(--muted); font-size: 12px; margin-top: 4px; max-width: 27ch; }
.about-chapter h2, .about-takeaway h2 { font-size: clamp(31px,3.3vw,43px); line-height: 1.16; margin-bottom: 26px; text-wrap: balance; }
.about-chapter-copy > p { color: var(--muted); margin-bottom: 21px; max-width: 66ch; }
.about-chapter-copy > .text-link { margin-top: 8px; }
.about-training { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; margin-block: 30px; padding: 28px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-panel); }
.about-training > p { display: flex; flex-direction: column; justify-content: center; }
.about-training strong { font-family: var(--display); font-size: clamp(43px,5vw,64px); line-height: 1; font-weight: 400; }
.about-training > p > span { color: var(--muted); font-size: 12px; margin-top: 12px; max-width: 22ch; }
.about-training h3 { font-size: 25px; line-height: 1.2; margin-bottom: 15px; }
.about-training div p { font-size: 14px; color: var(--muted); }
.about-leadership { margin-block: 28px; }
.about-leadership > div { display: grid; grid-template-columns: 130px 1fr; gap: 22px; padding-block: 20px; border-top: 1px solid var(--line); }
.about-leadership dt { font-size: 13px; font-weight: 550; }
.about-leadership dd { color: var(--muted); margin: 0; font-size: 15px; }
.about-team { display: grid; grid-template-columns: 200px 1fr; align-items: end; gap: 25px; margin: 30px 0; }
.about-team img { border-radius: var(--radius-frame); width: 200px; }
.about-team figcaption { font-family: var(--hand); font-size: 23px; line-height: 1.35; color: var(--muted); max-width: 20ch; padding-bottom: 14px; }
.about-takeaway { max-width: 770px; margin: 0 auto; padding-block: 65px; }
.about-takeaway h2 { margin-top: 18px; }
.about-takeaway > p { color: var(--muted); max-width: 60ch; }
.about-takeaway .sources { margin-top: 40px; }
@media (max-width: 900px) {
  .about-hero { grid-template-columns: 1.4fr 1fr; }
  .about-hero h1 { font-size: 46px; }
  .about-origin, .about-chapter { grid-template-columns: 1fr 2.4fr; gap: 28px; }
  .about-training { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 720px) {
  .about-hero { grid-template-columns: 1fr; padding-block: 42px; gap: 35px; }
  .about-hero h1 { font-size: clamp(43px,8.3vw,60px); }
  .about-intro { font-size: 16px; }
  .about-portrait { width: 76%; max-width: 360px; justify-self: center; }
  .about-origin, .about-chapter { grid-template-columns: 1fr; gap: 22px; }
  .about-origin { padding-block: 30px; }
  .about-chapter { padding-block: 38px; }
  .about-chapter-label { padding-top: 0; }
  .about-chapter-label > span:last-child { max-width: none; }
  .about-chapter h2, .about-takeaway h2 { font-size: 34px; margin-bottom: 23px; }
  .about-training { padding: 24px; }
  .about-leadership > div { grid-template-columns: 1fr; gap: 8px; }
  .about-team { grid-template-columns: 1fr 1fr; gap: 18px; }
  .about-team figcaption { font-size: 21px; }
  .about-takeaway { padding-block: 40px; }
}
@media (max-width: 380px) {
  .about-hero h1 { font-size: 40px; }
  .about-training { padding: 20px; }
  .about-team { grid-template-columns: 1fr; }
  .about-team img { width: 200px; }
  .about-team figcaption { max-width: none; padding-bottom: 0; }
}