.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--pit);
  color: var(--paper);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line-dark-soft) 1px, transparent 1px);
  background-size: 100% 54px;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 36px);
  padding-block: clamp(26px, 5vw, 54px) clamp(30px, 5vw, 58px);
}

.page-about .about-hero__intro {
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(40px, 8vw, 68px);
  line-height: 0.96;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper-72);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 12px 18px 0 0;
  margin-right: 18px;
  border-right: 1px solid var(--line-dark);
}

.page-about .about-hero__facts li:last-child {
  border-right: 0;
  margin-right: 0;
  padding-right: 0;
}

.page-about .about-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 36px);
  line-height: 1;
  color: var(--signal);
  letter-spacing: -0.02em;
}

.page-about .about-hero__fact-unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper-60);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line-dark);
}

.page-about .about-hero__figure::before,
.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  background: var(--orange);
}

.page-about .about-hero__figure::before {
  width: 1px;
  height: 34px;
  top: -1px;
  left: 22px;
}

.page-about .about-hero__figure::after {
  height: 1px;
  width: 34px;
  bottom: -1px;
  right: 18px;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  background: var(--ink);
}

.page-about .about-hero__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--paper-60);
}

.page-about .breadcrumbs--dark .breadcrumbs__link,
.page-about .breadcrumbs--dark .breadcrumbs__sep,
.page-about .breadcrumbs--dark span[aria-current="page"] {
  color: var(--paper-60);
}

.page-about .breadcrumbs--dark .breadcrumbs__link:hover {
  color: var(--signal);
}

/* ---------- .page-about split ---------- */

.page-about .about-body {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(32px, 5vw, 68px);
  background: var(--paper);
}

.page-about .about-track {
  background: var(--pit);
  color: var(--paper);
  border: 1px solid var(--line-dark);
  padding: clamp(16px, 2.4vw, 24px);
  min-width: 0;
}

.page-about .about-track__label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--concrete);
}

.page-about .about-track__years {
  display: grid;
  gap: 2px;
  margin: 0 0 20px;
  padding: 0 0 16px;
  list-style: none;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-track__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  text-decoration: none;
  color: var(--paper-72);
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-track__year .mono {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: -0.02em;
}

.page-about .about-track__tag {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--concrete);
}

.page-about .about-track__year:hover,
.page-about .about-track__year[aria-current="true"] {
  color: var(--signal);
  border-left-color: var(--signal);
}

.page-about .about-track__year[aria-current="true"] .about-track__tag {
  color: var(--paper-72);
}

.page-about .about-track__chapters {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track__chapter {
  display: block;
  padding: 8px 0 8px 10px;
  font-size: 13.5px;
  line-height: 1.55;
  text-decoration: none;
  color: var(--paper-60);
  border-left: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-track__chapter:hover,
.page-about .about-track__chapter[aria-current="true"] {
  color: var(--signal);
  border-left-color: var(--orange);
}

/* ---------- content ---------- */

.page-about .about-content {
  min-width: 0;
}

.page-about .about-section {
  padding-bottom: clamp(32px, 5vw, 56px);
  margin-bottom: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-section:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
}

.page-about .about-section h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--pit);
  font-weight: 700;
}

.page-about .about-section__lead {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-section p {
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-section__note {
  margin-top: 20px;
  padding-left: 14px;
  border-left: 2px solid var(--concrete);
  font-size: 14.5px !important;
  color: var(--moss) !important;
}

/* ---------- coordinate chain ---------- */

.page-about .about-chain {
  display: grid;
  gap: 0;
  margin: 0 0 26px;
  border-top: 1px solid var(--line-light);
}

.page-about .about-chain__item {
  position: relative;
  padding: 16px 0 16px 0;
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-chain__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
  margin-bottom: 4px;
}

.page-about .about-chain__item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--pit);
  letter-spacing: 0.01em;
}

.page-about .about-chain__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-quote {
  margin: 0;
  padding: 6px 0 6px clamp(16px, 2.4vw, 26px);
  border-left: 4px solid var(--orange);
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--pit);
}

/* ---------- stages ---------- */

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

.page-about .about-stage {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.8vw, 26px) 0;
  border-top: 1px solid var(--line-light);
}

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

.page-about .about-stage__year {
  font-family: var(--font-mono);
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1;
  letter-spacing: -0.035em;
  color: var(--orange);
}

.page-about .about-stage__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--pit);
}

.page-about .about-stage__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- venue file ---------- */

.page-about .about-venue {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  margin-bottom: 22px;
}

.page-about .about-file {
  margin: 0;
  border: 1px solid var(--line-light);
  background: var(--paper);
}

.page-about .about-file__row {
  display: grid;
  gap: 4px;
  padding: 13px 14px;
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-file__row:last-child {
  border-bottom: 0;
}

.page-about .about-file__key {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
  border-bottom: 1px dashed var(--concrete);
  cursor: help;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-about .about-file__key:hover,
.page-about .about-file__key:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
  outline: none;
}

.page-about .about-file__val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-venue__figure {
  margin: 0;
}

.page-about .about-venue__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line-light);
  background: var(--paper-dim);
}

.page-about .about-venue__cap {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- team ---------- */

.page-about .about-team {
  display: grid;
  gap: 1px;
  margin: 0 0 22px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .about-team__stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--paper);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 38px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--pit);
  flex: 0 0 auto;
  min-width: 2ch;
}

.page-about .about-team__unit {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- cities ---------- */

.page-about .about-cities {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  margin-bottom: 24px;
}

.page-about .about-cities__text p {
  margin: 0 0 14px;
}

.page-about .about-cities__link {
  margin: 0;
}

.page-about .about-inline-link {
  color: var(--pit);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 1px;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-about .about-inline-link:hover {
  color: var(--orange);
}

.page-about .about-atlas-wrap {
  border: 1px solid var(--line-light);
  padding: 14px;
  background: var(--paper-dim);
}

.page-about .about-atlas {
  display: block;
  width: 100%;
  height: auto;
  color: var(--moss);
}

.page-about .about-atlas__grid line {
  stroke: var(--concrete);
  stroke-width: 1;
  opacity: 0.6;
}

.page-about .about-atlas__links path {
  fill: none;
  stroke: var(--moss);
  stroke-width: 1;
  opacity: 0.55;
}

.page-about .about-atlas__dots circle {
  fill: var(--orange);
}

.page-about .about-atlas__dots circle:nth-child(6) {
  fill: var(--signal);
  stroke: var(--pit);
  stroke-width: 1.5;
}

.page-about .about-atlas__cap {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--moss);
}

.page-about .about-cities__figure {
  margin: 0;
}

.page-about .about-cities__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-light);
  background: var(--paper-dim);
}

.page-about .about-cities__cap {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- join ---------- */

.page-about .about-join {
  background: var(--pit);
  color: var(--paper);
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--line-dark);
}

.page-about .about-join h2 {
  margin: 10px 0 22px;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-join__grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 34px);
}

.page-about .about-join__col h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--signal);
  letter-spacing: 0.01em;
}

.page-about .about-join__col p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-72);
  max-width: 46ch;
}

.page-about .about-join__foot {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper-60);
  max-width: 62ch;
}

.page-about .about-inline-link--signal {
  color: var(--paper);
  border-bottom-color: var(--signal);
}

.page-about .about-inline-link--signal:hover {
  color: var(--signal);
}

/* ---------- responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-chain {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(18px, 3vw, 30px);
  }

  .page-about .about-chain__item {
    border-bottom: 1px solid var(--line-light);
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 40fr) minmax(0, 60fr);
    align-items: start;
  }

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

  .page-about .about-stage {
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: clamp(18px, 2.4vw, 30px);
    align-items: start;
  }

  .page-about .about-stage__year {
    font-size: clamp(36px, 4vw, 52px);
    padding-top: 4px;
    border-right: 1px solid var(--line-light);
    padding-right: 16px;
  }

  .page-about .about-venue,
  .page-about .about-cities {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-cities__text {
    order: 1;
  }

  .page-about .about-atlas-wrap {
    order: 2;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 0.32fr) minmax(0, 0.68fr);
    align-items: start;
  }

  .page-about .about-track {
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 128px);
    overflow-y: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__year,
  .page-about .about-track__chapter,
  .page-about .about-inline-link,
  .page-about .about-file__key {
    transition: none;
  }
}
<<<END>>>