.page-about {
  background-color: var(--ink-0);
  color: var(--frost);
  overflow-x: clip;
}

.page-about .ab-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 48px) clamp(32px, 5vw, 64px);
  background:
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(61, 90, 115, 0.16) 79px 80px),
    linear-gradient(180deg, rgba(12, 26, 38, 0.92), rgba(7, 16, 24, 0.98));
  border-bottom: 1px solid var(--rule);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .ab-hero__tag {
  margin-bottom: 18px;
}

.page-about .ab-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--white);
  max-width: 14ch;
}

.page-about .ab-hero__lede {
  margin: 0 0 24px;
  max-width: 48ch;
  font-size: clamp(0.95rem, 1.5vw, 1.06rem);
  line-height: 1.85;
  color: rgba(232, 241, 246, 0.82);
}

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

.page-about .ab-hero__figure {
  position: relative;
  margin: 0;
  padding: 10px;
  background: var(--ink-1);
  border: 1px solid var(--rule);
  box-shadow: 8px 8px 0 -1px var(--ink-2), 8px 8px 0 0 var(--rule);
}

.page-about .ab-hero__figure .tag {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 2;
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.06);
}

.page-about .ab-hero__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: 18px;
  border-top: 1px dashed var(--rule);
}

.page-about .ab-hero__meta .stat__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  line-height: 1;
  color: var(--frost);
}

.page-about .ab-hero__meta-item:nth-child(1) .stat__num {
  color: var(--signal);
}

.page-about .ab-hero__meta-item:nth-child(2) .stat__num {
  color: var(--venue);
}

.page-about .ab-hero__meta .stat__label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: rgba(232, 241, 246, 0.58);
}

.page-about .ab-body {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  padding-block: clamp(32px, 5vw, 64px);
}

.page-about .ab-index {
  border-top: 1px solid var(--rule);
  padding-top: 14px;
}

.page-about .ab-index__head {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--rule);
}

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

.page-about .ab-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--rule);
  text-decoration: none;
  color: var(--frost);
  white-space: nowrap;
  font-size: 0.8rem;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  color: var(--signal);
  border-color: var(--signal);
  background-color: rgba(255, 106, 26, 0.08);
}

.page-about .ab-index__num {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--rule);
}

.page-about .ab-index__link:hover .ab-index__num,
.page-about .ab-index__link:focus-visible .ab-index__num {
  color: var(--signal);
}

.page-about .ab-chapter {
  position: relative;
  padding-block: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--rule);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .ab-chapter:target .chapter-num {
  color: var(--signal);
}

.page-about .ab-chapter .section-head {
  margin-bottom: clamp(16px, 3vw, 26px);
}

.page-about .chapter-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.2rem, 9vw, 6rem);
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: var(--ink-2);
}

.page-about .eyebrow {
  margin: 12px 0 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--signal);
}

.page-about .ab-chapter h2 {
  margin: 0;
  max-width: 26ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .ab-lede {
  margin: 0 0 clamp(18px, 3vw, 26px);
  max-width: 64ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(232, 241, 246, 0.78);
}

.page-about .ab-text p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(232, 241, 246, 0.8);
}

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

.page-about .ab-chapter--paper {
  margin-block: 8px;
  padding: clamp(18px, 3.5vw, 34px);
  background: var(--paper);
  color: var(--ink-dark);
  border: 1px solid var(--ink-dark);
  box-shadow: 8px 8px 0 -1px var(--ink-2), 8px 8px 0 0 var(--rule);
}

.page-about .ab-chapter--paper .chapter-num {
  color: var(--ink-2);
  opacity: 0.28;
}

.page-about .ab-chapter--paper .eyebrow {
  color: var(--signal);
}

.page-about .ab-chapter--paper h2 {
  color: var(--ink-dark);
}

.page-about .ab-chapter--paper .ab-text p {
  color: rgba(17, 20, 23, 0.82);
}

.page-about .ab-note {
  display: grid;
  gap: 12px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid rgba(17, 20, 23, 0.26);
}

.page-about .ab-note__item {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-about .ab-note__label {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.94rem;
  color: var(--ink-dark);
}

.page-about .ab-note__text {
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(17, 20, 23, 0.76);
}

.page-about .ab-rail {
  display: grid;
  gap: 22px;
  margin-top: 6px;
}

.page-about .ab-stop {
  position: relative;
  min-width: 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.page-about .ab-stop::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-0);
  border: 2px solid var(--signal);
}

.page-about .ab-stop .dossier {
  min-width: 0;
}

.page-about .ab-stop .dossier__trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.page-about .ab-stop .dossier__trigger:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.page-about .ab-stop__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal);
}

.page-about .ab-stop__name {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.98rem;
  color: var(--frost);
  transition: color var(--ease);
}

.page-about .ab-stop .dossier__trigger:hover .ab-stop__name,
.page-about .ab-stop .dossier__trigger:focus-visible .ab-stop__name {
  color: var(--signal);
}

.page-about .ab-stop__desc {
  display: block;
  padding-right: 24px;
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(232, 241, 246, 0.66);
}

.page-about .ab-stop .dossier__sign {
  position: absolute;
  top: 4px;
  right: 0;
  font-family: var(--font-mono);
  color: var(--rule);
}

.page-about .ab-stop .dossier__body {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed rgba(61, 90, 115, 0.55);
}

.page-about .ab-stop .dossier__body p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(232, 241, 246, 0.72);
}

.page-about .ab-flow {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ab-flow li {
  position: relative;
  min-width: 0;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

.page-about .ab-flow li::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 32px;
  height: 3px;
  background: var(--signal);
}

.page-about .ab-flow li:nth-child(2)::before {
  background: var(--venue);
}

.page-about .ab-flow li:nth-child(3)::before {
  background: var(--amber);
}

.page-about .ab-flow li:nth-child(4)::before {
  background: var(--frost);
}

.page-about .ab-flow__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--rule);
}

.page-about .ab-flow__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--frost);
}

.page-about .ab-flow__text {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(232, 241, 246, 0.72);
}

.page-about .ab-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 8px;
  background: var(--ink-1);
  border: 1px solid var(--rule);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.05);
}

.page-about .ab-figure figcaption {
  margin: 10px 2px 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: rgba(232, 241, 246, 0.56);
}

.page-about .ab-districts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 20px;
}

.page-about .ab-district {
  min-width: 0;
  padding: 14px;
  background: var(--ink-1);
  border: 1px solid var(--rule);
  transition: transform var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-about .ab-district:hover,
.page-about .ab-district:focus-within {
  transform: translateY(-4px);
  border-color: var(--signal);
  background: var(--ink-2);
}

.page-about .ab-district .dossier__trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 0 18px 0 0;
  border: 0;
  background: none;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.page-about .ab-district .dossier__trigger:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.page-about .ab-district__name {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--frost);
}

.page-about .ab-district__role {
  display: block;
  font-size: 0.76rem;
  line-height: 1.6;
  color: rgba(232, 241, 246, 0.64);
}

.page-about .ab-district .dossier__sign {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--font-mono);
  color: var(--signal);
}

.page-about .ab-district .dossier__body {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed rgba(61, 90, 115, 0.6);
}

.page-about .ab-district .dossier__body p {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.7;
  color: rgba(232, 241, 246, 0.7);
}

.page-about .ab-network {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
  margin-top: 6px;
}

.page-about .ab-network__figure {
  margin: 0;
  padding: 8px;
  background: var(--ink-1);
  border: 1px solid var(--rule);
}

.page-about .ab-network__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.05);
}

.page-about .ab-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .ab-rules {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-about .ab-rule {
  border: 1px solid var(--rule);
  background: linear-gradient(90deg, rgba(22, 50, 74, 0.72), rgba(12, 26, 38, 0.92));
  transition: border-color var(--ease);
}

.page-about .ab-rule:hover,
.page-about .ab-rule:focus-within {
  border-color: var(--signal);
}

.page-about .ab-rule .dossier__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: none;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.page-about .ab-rule .dossier__trigger:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-about .ab-rule__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--signal);
}

.page-about .ab-rule__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--frost);
}

.page-about .ab-rule .dossier__sign {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--signal);
}

.page-about .ab-rule .dossier__body {
  padding: 0 16px 16px 54px;
}

.page-about .ab-rule .dossier__body p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(232, 241, 246, 0.72);
}

.page-about .ab-milestones {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px dashed var(--rule);
}

.page-about .ab-milestone {
  min-width: 0;
}

.page-about .ab-milestone .stat__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 5vw, 2.6rem);
  line-height: 1;
  color: var(--frost);
}

.page-about .ab-milestone:nth-child(1) .stat__num {
  color: var(--signal);
}

.page-about .ab-milestone:nth-child(2) .stat__num {
  color: var(--venue);
}

.page-about .ab-milestone:nth-child(3) .stat__num {
  color: var(--amber);
}

.page-about .ab-milestone .stat__label {
  display: block;
  margin-top: 6px;
  font-size: 0.72rem;
  line-height: 1.5;
  color: rgba(232, 241, 246, 0.6);
}

.page-about .ab-cta {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--signal);
  background: linear-gradient(100deg, rgba(255, 106, 26, 0.14), rgba(12, 26, 38, 0.5) 58%, transparent);
}

.page-about .ab-cta h2 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  line-height: 1.35;
  color: var(--white);
}

.page-about .ab-cta p {
  margin: 0;
  max-width: 60ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(232, 241, 246, 0.78);
}

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

@media (min-width: 760px) {
  .page-about .ab-note {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .ab-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .ab-hero__figure {
    box-shadow: 12px 12px 0 -1px var(--ink-2), 12px 12px 0 0 var(--rule);
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .ab-body {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding: 4px 0 4px 16px;
    border-top: 0;
    border-left: 1px solid var(--rule);
  }

  .page-about .ab-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-index__list li {
    margin-bottom: 2px;
  }

  .page-about .ab-index__link {
    width: 100%;
    padding: 10px 0;
    border: 0;
    border-bottom: 1px solid rgba(61, 90, 115, 0.35);
    font-size: 0.88rem;
  }

  .page-about .ab-index__list li:last-child .ab-index__link {
    border-bottom: 0;
  }

  .page-about .ab-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .ab-stop {
    padding-right: 20px;
  }

  .page-about .ab-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .ab-flow li {
    padding-right: 18px;
  }

  .page-about .ab-network {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-district,
  .page-about .ab-index__link,
  .page-about .ab-stop__name,
  .page-about .ab-rule {
    transition: none;
  }

  .page-about .ab-district:hover,
  .page-about .ab-district:focus-within {
    transform: none;
  }
}
<<<END>>>