.page-about {
  --ab-toc: 200px;
  --ab-gap: 64px;
  --ab-sec-gap: 92px;
  --ab-shadow: 8px 8px 0 rgba(0, 0, 0, 0.45);
  background-color: var(--ink-0);
  color: var(--text);
  font-family: var(--font-body);
}

/* ---------- HERO ---------- */
.page-about .ab-hero {
  position: relative;
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(130% 100% at 88% -10%, rgba(41, 242, 196, 0.13), transparent 62%),
    linear-gradient(180deg, var(--ink-1) 0%, var(--ink-0) 100%);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, rgba(41, 242, 196, 0.04) 0 1px, transparent 1px 78px);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  padding: 28px 0 56px;
}

.page-about .ab-hero__crumbs {
  margin-bottom: 36px;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: end;
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: clamp(2rem, 7vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .ab-hero__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-about .ab-hero__lead {
  margin: 24px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .ab-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 22px;
  border: 2px solid var(--line-strong);
  background: linear-gradient(160deg, rgba(13, 42, 34, 0.96), rgba(8, 24, 19, 0.96));
  box-shadow: var(--ab-shadow);
}

.page-about .ab-hero__num {
  font-family: var(--font-num);
  font-size: clamp(3.2rem, 12vw, 5.4rem);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-hero__unit {
  font-size: 15px;
  color: var(--text);
}

.page-about .ab-hero__sub {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- SHELL ---------- */
.page-about .ab-shell {
  padding-top: 40px;
  padding-bottom: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

/* ---------- TOC ---------- */
.page-about .ab-toc {
  border-top: 2px solid var(--line);
  padding-top: 16px;
}

.page-about .ab-toc__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .ab-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 2px solid var(--line);
  border-radius: var(--radius-s);
  font-size: 14px;
  line-height: 1.3;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .ab-toc__link:hover,
.page-about .ab-toc__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan-soft);
  background-color: rgba(41, 242, 196, 0.07);
}

.page-about .ab-toc__no {
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- BODY ---------- */
.page-about .ab-body {
  display: flex;
  flex-direction: column;
  gap: var(--ab-sec-gap);
  padding-bottom: 96px;
  min-width: 0;
}

.page-about .ab-sec {
  scroll-margin-top: 120px;
  min-width: 0;
}

.page-about .ab-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 16px;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--line);
}

.page-about .ab-head__title {
  margin: 0;
  font-size: clamp(1.45rem, 4.4vw, 2.3rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--white);
}

.page-about .ab-head__no {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  flex: none;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .ab-p {
  margin: 0 0 1.2em;
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .ab-p:last-child {
  margin-bottom: 0;
}

/* ---------- FIGURES ROW ---------- */
.page-about .ab-figs {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.page-about .ab-fig {
  padding: 22px 20px;
  border: 2px solid var(--line);
  background-color: var(--ink-2);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-fig:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.5);
}

.page-about .ab-fig--lead {
  background: linear-gradient(155deg, rgba(41, 242, 196, 0.12), rgba(13, 42, 34, 0.98) 58%);
  border-color: var(--line-strong);
}

.page-about .ab-fig__nums {
  margin: 0 0 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
}

.page-about .ab-fig__n {
  font-family: var(--font-num);
  font-size: clamp(2rem, 6vw, 2.8rem);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-fig__x {
  font-size: 13px;
  color: var(--muted);
  margin-right: 10px;
}

.page-about .ab-fig__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-fig__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- BANNER ---------- */
.page-about .ab-banner {
  margin: 0 0 32px;
  border: 2px solid var(--line);
  box-shadow: var(--ab-shadow);
  overflow: hidden;
}

.page-about .ab-banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- FLOW ---------- */
.page-about .ab-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 36px;
}

.page-about .ab-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-step {
  position: relative;
  padding: 0 0 32px 68px;
}

.page-about .ab-step::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 50px;
  bottom: 4px;
  border-left: 1px dashed var(--line-strong);
}

.page-about .ab-step:last-child {
  padding-bottom: 0;
}

.page-about .ab-step:last-child::before {
  display: none;
}

.page-about .ab-step__no {
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--amber);
  background-color: var(--ink-2);
  color: var(--amber-soft);
  font-family: var(--font-num);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.5);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-step:hover .ab-step__no {
  background-color: var(--amber);
  color: var(--ink-0);
}

.page-about .ab-step__title {
  margin: 6px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-step__text {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .ab-step__meta {
  margin: 0;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-about .ab-step:hover .ab-step__meta {
  color: var(--cyan-soft);
}

.page-about .ab-flow__fig {
  margin: 0;
  border: 2px solid var(--line);
  background-color: var(--ink-1);
  box-shadow: var(--ab-shadow);
  padding: 12px;
}

.page-about .ab-flow__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-flow__cap {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- QUOTE ---------- */
.page-about .ab-quote {
  margin: 0;
  padding: 10px 0 10px 26px;
  border-left: 6px solid var(--cyan);
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
}

/* ---------- CREW ---------- */
.page-about .ab-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-crew__item {
  padding: 22px 20px;
  border: 2px solid var(--line);
  border-left: 6px solid var(--amber);
  background-color: var(--ink-1);
}

.page-about .ab-crew__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2.2rem, 7vw, 3rem);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.page-about .ab-crew__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-crew__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- TIMELINE TRACK ---------- */
.page-about .ab-track {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  padding-bottom: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .ab-node {
  flex: 0 0 82%;
  scroll-snap-align: start;
  padding: 22px 20px;
  border: 2px solid var(--line);
  background: linear-gradient(180deg, var(--ink-2), var(--ink-1));
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-node:hover {
  border-color: var(--amber);
  transform: translateY(-4px);
}

.page-about .ab-node__year {
  display: inline-block;
  padding: 5px 12px;
  border: 2px solid var(--amber);
  color: var(--amber-soft);
  font-family: var(--font-num);
  font-size: 16px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  margin-bottom: 16px;
}

.page-about .ab-node__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-node__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- SUPPORT ---------- */
.page-about .ab-support {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .ab-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .ab-support__fig {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--ab-shadow);
  overflow: hidden;
}

.page-about .ab-support__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- NEXT ---------- */
.page-about .ab-next {
  border-top: 2px solid var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(41, 242, 196, 0.035) 0 2px, transparent 2px 96px),
    linear-gradient(180deg, var(--ink-1), var(--ink-0));
}

.page-about .ab-next__inner {
  padding: 56px 0 72px;
}

.page-about .ab-next__title {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 4.2vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--white);
}

.page-about .ab-next__text {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .ab-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- RESPONSIVE ---------- */
@media (min-width: 600px) {
  .page-about .ab-figs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-fig--lead {
    grid-column: 1 / -1;
  }
  .page-about .ab-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-node {
    flex-basis: 300px;
  }
  .page-about .ab-hero__inner {
    padding: 36px 0 72px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-shell {
    grid-template-columns: var(--ab-toc) minmax(0, 1fr);
    gap: var(--ab-gap);
    padding-top: 64px;
  }

  .page-about .ab-toc {
    position: sticky;
    top: 108px;
    border-top: 0;
    border-left: 2px solid var(--line);
    padding: 4px 0 4px 18px;
  }

  .page-about .ab-toc__list {
    flex-direction: column;
    gap: 4px;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-about .ab-toc__link {
    border-color: transparent;
    padding: 8px 10px;
    white-space: normal;
  }

  .page-about .ab-toc__link:hover,
  .page-about .ab-toc__link:focus-visible {
    border-color: var(--line-strong);
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
  }

  .page-about .ab-hero__stat {
    align-self: end;
  }

  .page-about .ab-figs {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 18px;
  }

  .page-about .ab-fig--lead {
    grid-column: auto;
  }

  .page-about .ab-flow {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-support {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    gap: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-fig,
  .page-about .ab-node,
  .page-about .ab-step__no,
  .page-about .ab-step__meta,
  .page-about .ab-toc__link {
    transition: none;
  }
  .page-about .ab-fig:hover,
  .page-about .ab-node:hover {
    transform: none;
  }
}
<<<END>>>