.page-about {
  --about-line: rgba(201, 209, 201, 0.16);
  --about-line-strong: rgba(201, 209, 201, 0.28);
  --about-paper-ink: #16241D;
  --about-paper-muted: #3C4C42;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--mist);
}

.page-about .breadcrumb__list li[aria-current="page"] {
  color: var(--rock);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 44px) 0 clamp(28px, 5vw, 56px);
}

.page-about .about-hero__media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 23, 19, 0.05) 0%, rgba(10, 23, 19, 0.55) 100%);
  pointer-events: none;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__plate {
  position: relative;
  z-index: 2;
  margin-top: -56px;
  margin-inline: 0;
  padding: clamp(20px, 4vw, 40px);
  border-radius: var(--r-md);
  background: var(--chalk);
  color: var(--about-paper-ink);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.page-about .about-hero__plate h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 5.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-about .about-hero__plate .lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.8;
  color: var(--about-paper-muted);
}

.page-about .about-hero__plate .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: #5C6B60;
}

.page-about .about-hero__plate .eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--clay);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-hero__plate .btn--ghost {
  border-color: rgba(22, 36, 29, 0.28);
  color: var(--ink-900);
}

.page-about .about-hero__plate .btn--ghost:hover,
.page-about .about-hero__plate .btn--ghost:focus-visible {
  border-color: var(--ink-900);
  background: rgba(22, 36, 29, 0.06);
}

/* ---------- Stats ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--about-line);
}

.page-about .about-stat {
  padding: 18px 16px;
  background: var(--ink-800);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.1;
  color: var(--lime);
  letter-spacing: -0.01em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

/* ---------- Chapter TOC ---------- */
.page-about .about-toc {
  position: sticky;
  top: var(--bar-h);
  z-index: 20;
  margin-top: 8px;
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  background: rgba(10, 23, 19, 0.94);
  backdrop-filter: blur(10px);
}

.page-about .about-toc__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 9px var(--pad);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  white-space: nowrap;
  font-size: 13px;
  text-decoration: none;
  color: var(--rock);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

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

.page-about .about-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--signal);
}

/* ---------- Chapter shell ---------- */
.page-about .about-chapter {
  padding-block: clamp(44px, 7vw, 92px);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-chapter__idx {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-chapter__rail-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .about-chapter h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.8vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--chalk);
}

.page-about .about-copy p,
.page-about .about-lead {
  max-width: 62ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rock);
}

.page-about .about-lead {
  color: var(--rock);
}

.page-about .note {
  max-width: 62ch;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mist);
  border-left: 2px solid var(--about-line-strong);
  padding-left: 12px;
}

/* ---------- Banded sections ---------- */
.page-about .about-band {
  padding: clamp(22px, 4vw, 46px);
  border-radius: var(--r-lg);
}

.page-about .about-band--paper {
  background: var(--chalk);
  color: var(--about-paper-ink);
}

.page-about .about-band--moss {
  background: var(--moss);
  border: 1px solid var(--about-line);
}

.page-about .about-band--paper h2 {
  color: var(--ink-900);
}

.page-about .about-band--paper .about-chapter__idx {
  color: var(--clay);
}

.page-about .about-band--paper .about-chapter__rail-label {
  color: #5C6B60;
}

.page-about .about-band--paper .about-copy p,
.page-about .about-band--paper .about-lead,
.page-about .about-band--paper .about-split__text p {
  color: var(--about-paper-muted);
}

/* ---------- Service map ---------- */
.page-about .about-map {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-map__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(22, 36, 29, 0.12);
  color: var(--about-paper-ink);
}

.page-about .about-map__card .card__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink-900);
}

.page-about .about-map__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-paper-muted);
}

.page-about .about-map__card .tag {
  align-self: flex-start;
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- Version nodes ---------- */
.page-about .about-nodes {
  margin-top: 24px;
}

.page-about .about-node {
  border-top: 1px solid var(--about-line);
}

.page-about .about-node:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-node summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-about .about-node__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--signal);
  border: 1px solid rgba(255, 122, 61, 0.42);
  border-radius: 999px;
  padding: 3px 9px;
}

.page-about .about-node__title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--chalk);
}

.page-about .about-node__sign {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease);
}

.page-about .about-node[open] .about-node__sign {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-about .about-node[open] .about-node__title {
  color: var(--lime);
}

.page-about .about-node__body {
  padding: 0 0 18px;
}

.page-about .about-node__body p {
  max-width: 60ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--rock);
}

/* ---------- Figures ---------- */
.page-about .about-figure {
  margin: 24px 0;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-about .about-figure__cap {
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--about-line);
}

.page-about .about-band--paper .about-figure {
  border-color: rgba(22, 36, 29, 0.16);
  background: rgba(22, 36, 29, 0.06);
}

.page-about .about-band--paper .about-figure__cap {
  border-top-color: rgba(22, 36, 29, 0.14);
  color: #5C6B60;
}

/* ---------- Flow list ---------- */
.page-about .about-flow {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-about .about-flow__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-flow__item:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-flow__step {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--data);
  padding-top: 2px;
}

.page-about .about-flow__item h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .about-flow__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--rock);
  max-width: 58ch;
}

/* ---------- Archive switch ---------- */
.page-about .about-archive {
  position: relative;
  margin-top: 28px;
  padding: 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: var(--ink-800);
}

.page-about .about-archive__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .about-archive__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .about-archive__tab {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid var(--about-line-strong);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--rock);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-archive__tab:hover {
  border-color: var(--line-lime);
  color: var(--lime);
}

.page-about .about-archive__input:focus-visible ~ .about-archive__tabs {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
  border-radius: var(--r-sm);
}

.page-about #arc-season:checked ~ .about-archive__tabs label[for="arc-season"],
.page-about #arc-team:checked ~ .about-archive__tabs label[for="arc-team"],
.page-about #arc-stage:checked ~ .about-archive__tabs label[for="arc-stage"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
  font-weight: 600;
}

.page-about .about-archive__panel {
  display: none;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about #arc-season:checked ~ .about-archive__panels #panel-season,
.page-about #arc-team:checked ~ .about-archive__panels #panel-team,
.page-about #arc-stage:checked ~ .about-archive__panels #panel-stage {
  display: grid;
}

.page-about .about-archive__item {
  padding: 14px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-sm);
  background: var(--ink-700);
}

.page-about .about-archive__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--lime);
}

.page-about .about-archive__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- Team split ---------- */
.page-about .about-split {
  display: grid;
  gap: 18px;
  margin-top: 8px;
}

.page-about .about-split__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-paper-muted);
  max-width: 58ch;
}

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

.page-about .about-figure--square {
  margin: 0;
  border-radius: var(--r-md);
}

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- Facts ---------- */
.page-about .about-facts {
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line-strong);
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-facts dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--chalk);
  word-break: break-word;
}

.page-about .about-facts dd.mono {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
}

.page-about .about-inline-link {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-inline-link a {
  color: var(--data);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  color: var(--lime);
}

/* ---------- Next steps ---------- */
.page-about .about-next {
  padding-bottom: clamp(56px, 8vw, 100px);
}

.page-about .about-next__heading {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 32px);
  letter-spacing: -0.015em;
  color: var(--chalk);
}

.page-about .about-next__grid {
  display: grid;
  gap: 12px;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: var(--ink-800);
  text-decoration: none;
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--line-lime);
  background: var(--ink-700);
  transform: translateY(-2px);
}

.page-about .about-next__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.page-about .about-next__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .about-next__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- Tablet ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__plate {
    margin-inline: 0 6%;
  }

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

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

  .page-about .about-map__card:first-child {
    grid-column: 1 / -1;
  }

  .page-about .about-facts__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

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

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

/* ---------- Desktop ---------- */
@media (min-width: 900px) {
  .page-about .about-toc {
    top: 0;
  }

  .page-about .about-toc__list {
    padding-inline: 0;
    max-width: var(--maxw);
    margin-inline: auto;
  }

  .page-about .about-hero__plate {
    margin-top: -96px;
    margin-inline: 0 14%;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 6px 0 6px 16px;
    border-left: 1px solid var(--about-line);
    align-self: start;
    position: sticky;
    top: 92px;
  }

  .page-about .about-band--paper .about-chapter__rail {
    border-left-color: rgba(22, 36, 29, 0.18);
  }

  .page-about .about-band--moss .about-chapter__rail {
    border-left-color: var(--about-line-strong);
  }

  .page-about .about-chapter__rail-label {
    writing-mode: horizontal-tb;
  }

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

  .page-about .about-map__card:first-child {
    grid-column: span 2;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-figure {
    margin-top: 28px;
  }

  .page-about .about-figure--square {
    margin-top: 0;
  }

  .page-about .about-node__body {
    padding-left: 62px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__plate {
    margin-inline: 0 20%;
  }
}

/* ---------- Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-next__card,
  .page-about .about-node__sign,
  .page-about .about-archive__tab {
    transition: none;
  }

  .page-about .about-next__card:hover,
  .page-about .about-next__card:focus-visible {
    transform: none;
  }
}
<<<END>>>