.page-about {
  --ab-pad: 56px;
  --ab-line: 1px solid var(--hair-dark);
  background: var(--paper);
  color: var(--tx-ink);
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 3px;
}

.page-about h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 5.2vw, 38px);
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 14px 0 16px;
}

.page-about h3 {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
}

.page-about .fig-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--hair-dark);
  background: var(--night);
}

.page-about .fig-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .fig-frame__caption {
  display: block;
  padding: 10px 12px;
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: rgba(13, 27, 33, 0.62);
  background: rgba(216, 212, 200, 0.28);
}

/* ---------- Hero ---------- */
.ab-hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(160deg, var(--ink-sea) 0%, var(--ink-sea) 52%, var(--night) 100%);
  color: var(--tx-paper);
  padding: 26px 0 48px;
}

.ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(216, 212, 200, 0.07) 1px, transparent 1px),
    linear-gradient(0deg, rgba(216, 212, 200, 0.07) 1px, transparent 1px);
  background-size: 92px 92px;
  pointer-events: none;
}

.ab-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -8%;
  width: 68%;
  height: 62%;
  background: var(--indigo);
  opacity: 0.34;
  clip-path: polygon(38% 0, 100% 0, 100% 74%, 0 100%);
  pointer-events: none;
}

.ab-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb__link {
  color: rgba(248, 245, 237, 0.66);
  text-decoration: none;
}

.page-about .breadcrumb__link:hover {
  color: var(--gilt-lift);
}

.page-about .breadcrumb__item {
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(248, 245, 237, 0.5);
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--gilt);
}

.ab-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.ab-hero__lead h1 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 7.4vw, 54px);
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 16px 0 18px;
  color: var(--tx-paper);
  max-width: 20ch;
}

.ab-hero__dek {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(248, 245, 237, 0.78);
  max-width: 56ch;
}

.ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.ab-plate {
  align-self: start;
  background: rgba(18, 49, 61, 0.82);
  border: 1px solid var(--hair);
  border-top: 2px solid var(--gilt);
  padding: 20px 18px;
}

.ab-plate__title {
  margin: 0 0 12px;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gilt);
}

.ab-plate__rows {
  margin: 0;
}

.ab-plate__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--hair-soft);
}

.ab-plate__row:last-child {
  border-bottom: 0;
}

.ab-plate__row dt {
  font-size: 13px;
  color: rgba(248, 245, 237, 0.62);
  letter-spacing: 0.04em;
}

.ab-plate__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 16px;
  color: var(--gilt-lift);
}

.ab-hero__stats {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--hair);
}

.ab-hero__stats li {
  padding: 16px 14px 16px 0;
  border-bottom: 1px solid var(--hair);
}

.ab-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 700;
  color: var(--gilt-lift);
  letter-spacing: -0.01em;
}

.ab-stat__lab {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: rgba(248, 245, 237, 0.6);
}

/* ---------- Section rhythm ---------- */
.ab-section {
  padding: var(--ab-pad) 0;
}

.ab-section--paper {
  background: var(--paper);
  color: var(--tx-ink);
}

.ab-section--dark {
  background: var(--ink-sea);
  color: var(--tx-paper);
}

.ab-section--night {
  background: var(--night);
  color: var(--tx-paper);
}

.ab-section--indigo {
  background: var(--indigo);
  color: var(--tx-paper);
}

.ab-head {
  max-width: 62ch;
  margin-bottom: 30px;
}

.ab-head__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(248, 245, 237, 0.72);
}

.ab-head--ink .ab-head__note {
  color: rgba(13, 27, 33, 0.7);
}

.ab-lede {
  margin: 0 0 6px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(13, 27, 33, 0.76);
}

.ab-split {
  align-items: start;
  row-gap: 30px;
}

.ab-split .col-5 .fig-frame {
  margin-top: 4px;
}

/* ---------- Points ---------- */
.ab-points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.ab-points li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--hair-dark);
}

.ab-points li:last-child {
  border-bottom: 1px solid var(--hair-dark);
}

.ab-points__k {
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
}

.ab-points__t {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(13, 27, 33, 0.78);
}

.ab-points__t strong {
  color: var(--tx-ink);
  font-weight: 700;
}

/* ---------- Timeline ---------- */
.ab-timeline {
  display: grid;
  gap: 28px;
}

.ab-index__head {
  margin: 0;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gilt);
  text-transform: uppercase;
}

.ab-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 18px;
}

.ab-index__link {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(248, 245, 237, 0.66);
  text-decoration: none;
  transition: color var(--ease-fast), border-color var(--ease-fast);
}

.ab-index__link:hover {
  color: var(--gilt-lift);
  border-color: var(--gilt);
}

.ab-track {
  position: relative;
  padding-left: 26px;
  border-left: 1px solid var(--hair);
}

.ab-node {
  position: relative;
  padding-bottom: 34px;
}

.ab-node::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--gilt);
}

.ab-node__year {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gilt);
  margin-bottom: 10px;
}

.ab-node h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--tx-paper);
}

.ab-node p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(248, 245, 237, 0.72);
  max-width: 58ch;
}

.ab-track__fig {
  margin: 0 0 34px;
  border: 1px solid var(--hair);
}

.ab-track__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.ab-track__fig .fig-frame__caption {
  color: rgba(248, 245, 237, 0.66);
  background: rgba(10, 28, 38, 0.72);
}

/* ---------- Steps ---------- */
.ab-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.ab-step {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--hair-dark);
}

.ab-step:last-child {
  border-bottom: 1px solid var(--hair-dark);
}

.ab-step__no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
  padding-top: 4px;
}

.ab-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.ab-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(13, 27, 33, 0.72);
}

.ab-rhythm {
  list-style: none;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 2px solid var(--gilt);
  display: grid;
  gap: 12px;
}

.ab-rhythm li {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(13, 27, 33, 0.76);
}

.ab-rhythm b {
  font-family: var(--font-label);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--celadon);
}

/* ---------- Team ---------- */
.ab-chart {
  display: block;
  width: 100%;
  max-width: 720px;
  height: auto;
  margin: 4px 0 30px;
}

.ab-chart__box {
  fill: rgba(248, 245, 237, 0.04);
  stroke: rgba(199, 162, 75, 0.55);
  stroke-width: 1;
}

.ab-chart__line {
  stroke: rgba(216, 212, 200, 0.28);
  stroke-width: 1;
}

.ab-chart__label {
  fill: #F8F5ED;
  font-family: var(--font-heading);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.ab-chart__num {
  fill: #C7A24B;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
}

.ab-chart__sub {
  fill: rgba(248, 245, 237, 0.55);
  font-family: var(--font-label);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

.ab-folds {
  border-bottom: 1px solid var(--hair);
}

.ab-fold {
  border-top: 1px solid var(--hair);
}

.ab-fold summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 16px 34px 16px 0;
  font-family: var(--font-heading);
  font-size: 16px;
  letter-spacing: 0.03em;
  color: var(--tx-paper);
}

.ab-fold summary::-webkit-details-marker {
  display: none;
}

.ab-fold summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--gilt);
}

.ab-fold[open] summary::after {
  content: "–";
}

.ab-fold[open] summary {
  color: var(--gilt-lift);
}

.ab-fold p {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.82;
  color: rgba(248, 245, 237, 0.72);
  max-width: 62ch;
}

.ab-partners {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.ab-partner {
  border: 1px solid var(--hair);
  border-left: 2px solid var(--gilt);
  padding: 16px 16px 18px;
  background: rgba(10, 28, 38, 0.5);
}

.ab-partner__n {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  color: var(--gilt-lift);
}

.ab-partner__t {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(248, 245, 237, 0.68);
}

/* ---------- Cards ---------- */
.ab-cards {
  display: grid;
  gap: 24px;
  margin-top: 30px;
}

.ab-card {
  border-top: 2px solid var(--gilt);
  padding-top: 16px;
}

.ab-card__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cinnabar);
  margin-bottom: 10px;
}

.ab-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  letter-spacing: 0.06em;
}

.ab-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(13, 27, 33, 0.74);
}

/* ---------- Scenes ---------- */
.ab-scenes {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.ab-scene {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border: 1px solid rgba(248, 245, 237, 0.22);
  background: rgba(10, 28, 38, 0.34);
  transition: border-color var(--ease-fast), transform var(--ease-fast);
}

.ab-scene:hover {
  border-color: var(--gilt);
  transform: translateY(-2px);
}

.ab-scene__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gilt);
}

.ab-scene h3 {
  margin: 0;
  font-size: 17px;
  color: var(--tx-paper);
}

.ab-scene p {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(248, 245, 237, 0.76);
}

.ab-scene__link {
  align-self: flex-start;
  font-family: var(--font-label);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--gilt-lift);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(199, 162, 75, 0.5);
  transition: color var(--ease-fast), border-color var(--ease-fast);
}

.ab-scene__link:hover {
  color: var(--tx-paper);
  border-color: var(--tx-paper);
}

/* ---------- CTA ---------- */
.ab-cta {
  background: var(--ink-sea);
  border-top: 1px solid var(--hair);
  padding: 44px 0;
  color: var(--tx-paper);
}

.ab-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.ab-cta h2 {
  margin: 10px 0 10px;
  font-family: var(--font-serif);
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.3;
  color: var(--tx-paper);
}

.ab-cta p {
  margin: 0;
  max-width: 54ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(248, 245, 237, 0.72);
}

.ab-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .ab-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 20px;
  }

  .ab-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .ab-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --ab-pad: 84px;
  }

  .page-about {
    --ab-pad: 84px;
  }

  .ab-hero {
    padding: 34px 0 64px;
  }

  .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: start;
  }

  .ab-plate {
    margin-top: 26px;
  }

  .ab-hero__stats {
    margin-top: 46px;
  }

  .ab-timeline {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 56px;
  }

  .ab-index {
    position: sticky;
    top: calc(var(--header-total) + 28px);
    align-self: start;
  }

  .ab-index__list {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .ab-track {
    padding-left: 34px;
  }

  .ab-node::before {
    left: -39px;
  }

  .ab-node {
    padding-bottom: 44px;
  }

  .ab-node__year {
    font-size: 40px;
  }

  .ab-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .ab-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .ab-cta__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }

  .ab-cta__links {
    flex-shrink: 0;
  }

  .ab-split {
    column-gap: 48px;
  }

  .ab-points li {
    grid-template-columns: 96px 1fr;
    gap: 18px;
  }

  .ab-step {
    grid-template-columns: 44px 1fr;
    gap: 16px;
  }
}

@media (min-width: 1100px) {
  .ab-section {
    padding: var(--ab-pad) 0;
  }

  .ab-hero__lead h1 {
    font-size: 54px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .ab-scene:hover {
    transform: none;
  }
}
<<<END>>>