.page-about {
  --ab-rail-w: 288px;
  color: var(--paper);
}

.page-about .ab-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 44px) 0 0;
  background:
    radial-gradient(90% 70% at 88% -10%, rgba(67, 255, 208, .12), transparent 60%),
    linear-gradient(180deg, #05140F 0%, #0A211A 100%);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(36, 71, 61, .5) 1px, transparent 1px),
    linear-gradient(0deg, rgba(36, 71, 61, .3) 1px, transparent 1px);
  background-size: clamp(56px, 7vw, 104px) 100%, 100% clamp(56px, 7vw, 104px);
  opacity: .28;
  pointer-events: none;
}

.page-about .ab-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: end;
}

.page-about .ab-hero-copy .eyebrow {
  margin: clamp(14px, 2vw, 22px) 0 0;
  color: var(--cyan-400);
  font-family: var(--font-numeric);
  letter-spacing: .14em;
}

.page-about .ab-hero-copy h1 {
  margin: 12px 0 0;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.05;
  letter-spacing: -.02em;
  font-weight: 800;
}

.page-about .ab-hero-copy .lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.85;
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-hero-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-700);
  box-shadow: 0 26px 60px -34px rgba(0, 0, 0, .95);
}

.page-about .ab-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-about .ab-hero-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: rgba(10, 33, 26, .92);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .ab-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 52px);
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-bottom: 0;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(14px, 2vw, 22px);
  background: var(--ink-800);
}

.page-about .ab-stat-num {
  font-family: var(--font-numeric);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan-400);
}

.page-about .ab-stat-label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(30px, 5vw, 68px);
  padding-bottom: clamp(8px, 2vw, 16px);
}

.page-about .ab-rail {
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: clamp(16px, 2vw, 22px);
}

.page-about .ab-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

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

.page-about .ab-rail-link {
  display: grid;
  grid-template-columns: 2.4em minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
  color: var(--paper);
  text-decoration: none;
  font-size: 14.5px;
  transition: color var(--dur-fast) var(--ease);
}

.page-about .ab-rail-no {
  font-family: var(--font-numeric);
  font-size: 12px;
  color: var(--cyan-600);
}

.page-about .ab-rail-link:hover .ab-rail-no,
.page-about .ab-rail-link:focus-visible .ab-rail-no {
  color: var(--orange-500);
}

.page-about .ab-rail-link:hover,
.page-about .ab-rail-link:focus-visible {
  color: var(--cyan-400);
}

.page-about .ab-rail-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted-dim);
}

.page-about .ab-block {
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(18px, 3vw, 30px);
  scroll-margin-top: 100px;
}

.page-about .ab-block + .ab-block {
  margin-top: clamp(30px, 4.4vw, 54px);
}

.page-about .ab-kicker {
  margin: 0 0 10px;
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange-500);
}

.page-about .ab-block h2 {
  margin: 0 0 clamp(12px, 1.8vw, 18px);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -.01em;
}

.page-about .ab-block p {
  max-width: 68ch;
  line-height: 1.88;
  color: var(--muted);
}

.page-about .ab-block p + p {
  margin-top: 12px;
}

.page-about .notice {
  margin-top: clamp(16px, 2.2vw, 22px);
}

.page-about .ab-archive {
  margin-top: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--line);
  background: rgba(16, 53, 42, .5);
}

.page-about .ab-archive details + details {
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-archive summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-about .ab-archive summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-archive summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-numeric);
  font-size: 16px;
  color: var(--cyan-400);
}

.page-about .ab-archive details[open] summary::after {
  content: "−";
  color: var(--orange-500);
}

.page-about .ab-archive summary:hover {
  background: rgba(67, 255, 208, .07);
}

.page-about .ab-archive-no {
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan-600);
}

.page-about .ab-archive-body {
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted-dim);
}

.page-about .ab-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.8vw, 30px);
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .ab-team-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.page-about .ab-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.8);
}

.page-about .ab-team-figure figcaption {
  padding: 9px 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-about .ab-team-text p {
  margin: 0;
}

.page-about .ab-team-text p + p {
  margin-top: 12px;
}

.page-about .ab-check {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: clamp(18px, 2.4vw, 24px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-check li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 12px 14px;
  border-left: 2px solid var(--cyan-600);
  background: rgba(16, 53, 42, .55);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted-dim);
}

.page-about .ab-check-label {
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-400);
}

.page-about .ab-stage-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(14px, 2vw, 20px) 0 0;
}

.page-about .ab-stage-jump .chip {
  text-decoration: none;
}

.page-about .ab-stages {
  margin-top: clamp(16px, 2.2vw, 22px);
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .ab-stages-cover {
  position: relative;
}

.page-about .ab-stages-cover img {
  display: block;
  width: 100%;
  height: clamp(130px, 22vw, 230px);
  object-fit: cover;
  filter: saturate(.7) brightness(.78);
}

.page-about .ab-stages-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 20, 15, .1) 0%, rgba(5, 20, 15, .92) 100%);
  pointer-events: none;
}

.page-about .ab-stage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-stage {
  padding: clamp(16px, 2.2vw, 24px);
  border-top: 1px solid var(--line);
  border-left: 2px solid var(--cyan-600);
  background: rgba(10, 33, 26, .72);
  scroll-margin-top: 100px;
  transition: background var(--dur) var(--ease);
}

.page-about .ab-stage:nth-child(even) {
  border-left-color: var(--orange-500);
}

.page-about .ab-stage:hover {
  background: rgba(16, 53, 42, .95);
}

.page-about .ab-stage-tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--line);
  font-family: var(--font-numeric);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .ab-stage h3 {
  margin: 12px 0 8px;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.35;
  color: var(--paper);
}

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

.page-about .ab-stage-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-stage-keys li {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan-400);
  border-bottom: 1px solid var(--cyan-600);
  padding-bottom: 2px;
}

.page-about .ab-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.8vw, 18px);
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-card {
  padding: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 53, 42, .7) 0%, rgba(10, 33, 26, .92) 100%);
  transition:
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-about .ab-card:hover,
.page-about .ab-card:focus-within {
  border-color: var(--cyan-600);
  transform: translateY(-3px);
  box-shadow: 0 20px 44px -30px rgba(67, 255, 208, .55);
}

.page-about .ab-card-title {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}

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

.page-about .ab-scene {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: 13px !important;
  color: var(--muted) !important;
  transition: color var(--dur) var(--ease);
}

.page-about .ab-card:hover .ab-scene,
.page-about .ab-card:focus-within .ab-scene {
  color: var(--orange-300) !important;
}

.page-about .ab-inline-link {
  margin-top: 16px;
  font-size: 14.5px;
}

.page-about .ab-inline-link a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-600);
}

.page-about .ab-inline-link a:hover {
  color: var(--paper);
}

.page-about .ab-sub-title {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--paper);
}

.page-about .ab-principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .ab-principles li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: clamp(14px, 1.8vw, 20px);
  background: var(--ink-800);
}

.page-about .ab-principle-no {
  font-family: var(--font-numeric);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange-500);
}

.page-about .ab-principles strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  color: var(--paper);
}

.page-about .ab-principles p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted-dim);
}

.page-about .ab-cta {
  margin-top: clamp(30px, 5vw, 64px);
  margin-bottom: clamp(36px, 6vw, 80px);
  padding-top: clamp(22px, 3vw, 38px);
  padding-bottom: clamp(22px, 3vw, 38px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(67, 255, 208, .09) 0%, transparent 55%);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .ab-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.3;
}

.page-about .ab-cta p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

@media (min-width: 720px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-team-grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .ab-check li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }

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

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

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

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

@media (min-width: 960px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }

  .page-about .ab-body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-rail {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-card,
  .page-about .ab-stage,
  .page-about .ab-scene,
  .page-about .ab-rail-link {
    transition: none;
  }

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