.page-about {
  --ab-gap: clamp(18px, 2.4vw, 32px);
  --ab-cut: 16px;
  --ab-hair: 1px solid var(--line);
  --ab-card-bg: linear-gradient(180deg, rgba(11, 34, 56, .96), rgba(3, 16, 28, .92));
  --ab-soft: rgba(140, 154, 165, .9);
  display: block;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-about .breadcrumbs {
  padding: 18px 0 4px;
  font-size: 12px;
  color: var(--stone);
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  letter-spacing: .06em;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--line);
}

.page-about .breadcrumbs a {
  color: var(--stone);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--teal);
}

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

/* ---------- hero ---------- */
.page-about .hero {
  position: relative;
  padding-bottom: clamp(30px, 4.5vw, 60px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(61, 242, 192, .16), transparent 62%),
    radial-gradient(80% 70% at 4% 110%, rgba(255, 138, 61, .12), transparent 60%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900) 78%);
  border-bottom: var(--ab-hair);
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .hero-lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.5vw, 17px);
  color: rgba(234, 244, 240, .82);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
}

.page-about .hero-stats .stat {
  min-width: 0;
}

.page-about .hero-stats dt {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--stone);
}

.page-about .hero-stats dd {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  color: var(--teal);
  line-height: 1.1;
}

.page-about .hero-media {
  margin: 0;
  overflow: hidden;
  border: var(--ab-hair);
  background: var(--deep);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

/* ---------- shell + rail ---------- */
.page-about .page-shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(48px, 6vw, 88px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ab-gap);
}

.page-about .rail {
  align-self: start;
  padding: 14px 14px 10px;
  background: rgba(11, 34, 56, .62);
  border: var(--ab-hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--stone);
}

.page-about .rail-list {
  display: flex;
  gap: 8px;
  margin: 10px 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-list li {
  flex: 0 0 auto;
}

.page-about .rail-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  font-size: 13px;
  color: var(--stone);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--moss);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--paper);
  border-color: var(--line);
}

.page-about .rail-link[aria-current="true"] {
  color: var(--ink-900);
  background: var(--teal);
  border-color: var(--teal);
}

.page-about .rail-link[aria-current="true"] .rail-num {
  color: rgba(6, 20, 33, .7);
}

/* ---------- sections ---------- */
.page-about .about-main {
  min-width: 0;
}

.page-about .section {
  padding: clamp(34px, 4.6vw, 62px) 0;
  border-top: var(--ab-hair);
}

.page-about .section:first-child {
  border-top: 0;
  padding-top: clamp(24px, 3vw, 40px);
}

.page-about h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .section-lede {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  color: rgba(234, 244, 240, .76);
}

.page-about .section-head {
  margin-bottom: clamp(20px, 2.6vw, 30px);
}

.page-about .note {
  margin: 12px 0 0;
  font-size: 12.5px;
  color: var(--stone);
}

.page-about .note a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 192, .4);
}

.page-about .note a:hover,
.page-about .note a:focus-visible {
  border-bottom-color: var(--teal);
}

.page-about .cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

/* ---------- filter ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .filter-btn {
  padding: 8px 16px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--paper);
  background: rgba(20, 59, 90, .45);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
}

.page-about .filter-btn[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
  font-weight: 700;
}

.page-about .filter-btn:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ---------- role cards ---------- */
.page-about .role-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.page-about .role-card {
  padding: 22px 20px 24px;
  background: var(--ab-card-bg);
  border: var(--ab-hair);
  transition: border-color .22s ease, transform .22s ease;
}

.page-about .role-card.is-hidden {
  display: none;
}

.page-about .role-card:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.page-about .role-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
}

.page-about .role-unit {
  margin-left: 4px;
  font-size: 14px;
  color: var(--stone);
}

.page-about .role-card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .role-card p {
  margin: 0;
  font-size: 14px;
  color: rgba(234, 244, 240, .76);
}

.page-about .role-list {
  margin: 14px 0 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
}

.page-about .role-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--stone);
}

.page-about .role-list li + li {
  margin-top: 6px;
}

.page-about .role-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--moss);
  transform: rotate(45deg);
}

/* ---------- timeline ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--teal), var(--moss) 42%, rgba(20, 59, 90, .35));
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 20px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 22px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--teal);
  border-radius: 50%;
  background: var(--ink-900);
  box-shadow: 0 0 0 4px rgba(61, 242, 192, .1);
}

.page-about .tl-card {
  padding: 18px 18px 20px;
  background: var(--ab-card-bg);
  border: var(--ab-hair);
  border-left: 3px solid var(--line);
  transition: border-left-color .22s ease, background-color .22s ease;
}

.page-about .tl-card:hover,
.page-about .tl-card:focus-within,
.page-about .tl-card:focus {
  border-left-color: var(--orange);
  outline: none;
}

.page-about .tl-card:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-about .tl-year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .tl-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl-card p {
  margin: 0;
  font-size: 14px;
  color: rgba(234, 244, 240, .78);
}

.page-about .tl-more {
  margin-top: 0 !important;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px !important;
  color: var(--stone) !important;
  transition: max-height .3s ease, opacity .3s ease, margin-top .3s ease;
}

.page-about .tl-card:hover .tl-more,
.page-about .tl-card:focus-within .tl-more,
.page-about .tl-card:focus .tl-more {
  max-height: 220px;
  opacity: 1;
  margin-top: 10px !important;
}

.page-about .inline-media {
  margin: 24px 0 0;
  padding: 0;
  border: var(--ab-hair);
  background: var(--deep);
  overflow: hidden;
}

.page-about .inline-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .inline-media figcaption {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line);
}

/* ---------- stat band ---------- */
.page-about .stat-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: var(--ab-hair);
  margin-bottom: 22px;
}

.page-about .stat-cell {
  padding: 18px 16px;
  background: var(--deep);
}

.page-about .stat-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
}

.page-about .stat-cap {
  margin: 8px 0 0;
  font-size: 12.5px;
  color: var(--stone);
}

.page-about .flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .flow-card {
  padding: 18px 18px 20px;
  background: rgba(11, 34, 56, .7);
  border: var(--ab-hair);
}

.page-about .flow-step {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--moss);
}

.page-about .flow-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .flow-card p {
  margin: 0;
  font-size: 14px;
  color: rgba(234, 244, 240, .76);
}

/* ---------- service ---------- */
.page-about .service-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--ab-hair);
}

.page-about .service-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 16px 0;
  border-bottom: var(--ab-hair);
}

.page-about .service-channel {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .service-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-about .service-desc {
  margin: 0;
  font-size: 13.5px;
  color: var(--stone);
}

.page-about .service-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

/* ---------- ecosystem ---------- */
.page-about .eco-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .eco-nodes {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .eco-node {
  background: var(--ab-card-bg);
  border: var(--ab-hair);
  border-left: 3px solid var(--line);
}

.page-about .eco-node[open] {
  border-left-color: var(--teal);
}

.page-about .eco-node summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .eco-node summary::-webkit-details-marker {
  display: none;
}

.page-about .eco-node summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: -2px;
}

.page-about .eco-count {
  min-width: 46px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
}

.page-about .eco-plus {
  font-size: 13px;
  color: var(--moss);
}

.page-about .eco-name {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .eco-toggle {
  position: relative;
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
}

.page-about .eco-toggle::before,
.page-about .eco-toggle::after {
  content: "";
  position: absolute;
  background: var(--stone);
  transition: transform .2s ease, background-color .2s ease;
}

.page-about .eco-toggle::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 2px;
}

.page-about .eco-toggle::after {
  left: 5px;
  top: 0;
  width: 2px;
  height: 12px;
}

.page-about .eco-node[open] .eco-toggle::after {
  transform: rotate(90deg);
}

.page-about .eco-node[open] .eco-toggle::before,
.page-about .eco-node[open] .eco-toggle::after {
  background: var(--orange);
}

.page-about .eco-node p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 13.5px;
  color: var(--stone);
}

.page-about .eco-media {
  margin: 0;
  border: var(--ab-hair);
  background: var(--deep);
  overflow: hidden;
}

.page-about .eco-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

/* ---------- records ---------- */
.page-about .record-panel {
  padding: 22px 20px 24px;
  background:
    linear-gradient(180deg, rgba(11, 34, 56, .95), rgba(3, 16, 28, .95)),
    var(--deep);
  border: var(--ab-hair);
}

.page-about .record-list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .record-row {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .record-row:first-child {
  padding-top: 0;
}

.page-about .record-row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--moss);
}

.page-about .record-row dd {
  margin: 0;
  font-size: 14px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-about .record-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .record-links a {
  font-size: 13px;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 192, .35);
}

.page-about .record-links a:hover,
.page-about .record-links a:focus-visible {
  border-bottom-color: var(--orange);
  color: var(--orange);
}

/* ---------- reveal ---------- */
.page-about [data-reveal] {
  opacity: 1;
}

.page-about [data-reveal]:not(.is-visible) {
  opacity: .001;
  transform: translateY(8px);
}

.page-about [data-reveal] {
  transition: opacity .3s ease, transform .3s ease;
}

/* ---------- responsive ---------- */
@media (min-width: 620px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .service-row {
    grid-template-columns: 150px minmax(0, 1.1fr) minmax(0, 1.6fr);
    gap: 6px 20px;
    align-items: baseline;
  }

  .page-about .record-row {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 4px 20px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: end;
  }

  .page-about .eco-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

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

@media (min-width: 980px) {
  .page-about .page-shell {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: clamp(24px, 3vw, 44px);
    border-left: var(--ab-hair);
    border-right: var(--ab-hair);
  }

  .page-about .rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    padding: 18px 16px 14px;
  }

  .page-about .rail-list {
    display: block;
    overflow: visible;
  }

  .page-about .rail-list li + li {
    margin-top: 4px;
  }

  .page-about .rail-link {
    width: 100%;
    white-space: normal;
  }
}

@media (max-width: 979px) {
  .page-about .tl-more {
    max-height: none;
    opacity: 1;
    margin-top: 10px !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }

  .page-about [data-reveal]:not(.is-visible) {
    opacity: 1;
    transform: none;
  }
}
<<<END>>>