.page-about {
  --about-paper-ink: #17251F;
  --about-paper-line: rgba(23, 37, 31, 0.18);
  --about-mint-soft: rgba(54, 241, 178, 0.12);
  --about-amber-soft: rgba(232, 179, 74, 0.16);
  --about-magenta-soft: rgba(255, 79, 135, 0.14);
  overflow-x: clip;
  background: var(--ink-900);
  color: var(--white);
}

.page-about .yd-breadcrumb {
  padding-top: clamp(1rem, 3vw, 1.8rem);
}

.page-about .yd-kicker {
  margin: 0 0 0.85rem;
  color: var(--mint);
  letter-spacing: 0.14em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.page-about .yd-section-num {
  font-family: var(--font-editorial);
  font-size: clamp(3.4rem, 10vw, 7.5rem);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 1px var(--mint);
  opacity: 0.8;
}

.about-hero {
  position: relative;
  padding: clamp(2rem, 6vw, 5.5rem) 0 clamp(3rem, 7vw, 6rem);
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 10% -18% auto 34%;
  height: min(36rem, 72vw);
  background:
    radial-gradient(circle at 70% 20%, rgba(54, 241, 178, 0.18), transparent 34%),
    linear-gradient(135deg, transparent 0 36%, rgba(20, 59, 48, 0.9) 36% 68%, transparent 68%);
  transform: skewY(-8deg);
  pointer-events: none;
  z-index: 0;
}

.about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
}

.about-hero__title {
  max-width: 13ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 6.2rem);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.about-hero__title span {
  display: block;
  color: var(--mint);
}

.about-hero__intro {
  max-width: 42rem;
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  color: var(--mist);
  font-size: clamp(1rem, 1.6vw, 1.14rem);
  line-height: 1.85;
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.about-hero__facts {
  display: grid;
  gap: 0.85rem;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
}

.about-fact {
  display: grid;
  grid-template-columns: 4.6rem 1fr;
  align-items: baseline;
  gap: 0.8rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 0.9rem;
}

.about-fact__num {
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
}

.about-hero__aside {
  position: relative;
  align-self: start;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  color: var(--about-paper-ink);
  background: var(--paper);
  border-radius: 2px 64px 2px 64px;
  box-shadow: 18px 18px 0 rgba(54, 241, 178, 0.08);
}

.about-hero__aside::after {
  content: "";
  position: absolute;
  right: -0.7rem;
  bottom: -0.7rem;
  width: 42%;
  height: 42%;
  border: 1px solid var(--amber);
  border-radius: 50% 8% 50% 8%;
  pointer-events: none;
}

.about-stamp {
  display: inline-block;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--amber);
  color: var(--about-paper-ink);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.about-hero__note {
  max-width: 24rem;
  margin: 1.4rem 0 0;
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  font-weight: 700;
  line-height: 1.55;
}

.about-hero__aside-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  margin: 2rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--about-paper-line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(23, 37, 31, 0.72);
}

.about-shell {
  display: grid;
  gap: 1.5rem;
}

.about-aside {
  position: relative;
}

.about-toc {
  padding: 1rem;
  background: var(--ink-800);
  border: 1px solid var(--line);
}

.about-toc .yd-toc__index {
  margin: 0 0 0.7rem;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.about-toc .yd-toc__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.2rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.about-toc .yd-toc__item {
  flex: 0 0 auto;
}

.about-toc .yd-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.65rem;
  color: var(--mist);
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 0.8rem;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.about-toc .yd-toc__link .yd-toc__index {
  margin: 0;
  color: var(--mint);
  font-size: 0.68rem;
}

.about-toc .yd-toc__link:hover,
.about-toc .yd-toc__link:focus-visible,
.about-toc .yd-toc__link[data-active="true"] {
  color: var(--white);
  border-color: var(--line);
  background: var(--ink-700);
  outline: none;
}

.about-body {
  min-width: 0;
}

.about-chapter {
  padding: clamp(2.4rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--line);
}

.about-chapter:first-child {
  border-top: 0;
}

.about-chapter__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1rem, 3vw, 2rem);
  align-items: start;
  margin-bottom: clamp(1.8rem, 4vw, 3rem);
}

.about-chapter__head h2 {
  max-width: 18ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.8vw, 3.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.about-chapter__lede {
  max-width: 48rem;
  margin: 1rem 0 0;
  color: var(--mist);
  line-height: 1.85;
}

.about-chapter--paper {
  margin: clamp(2rem, 5vw, 4rem) 0;
  padding: clamp(1.5rem, 5vw, 4rem);
  color: var(--about-paper-ink);
  background:
    linear-gradient(120deg, rgba(232, 179, 74, 0.08), transparent 40%),
    var(--paper);
  border-radius: 0 56px 0 56px;
}

.about-chapter--paper .yd-kicker {
  color: #236B52;
}

.about-chapter--paper .yd-section-num {
  -webkit-text-stroke-color: #1F6A51;
  opacity: 0.7;
}

.about-chapter--paper .about-chapter__lede {
  color: rgba(23, 37, 31, 0.72);
}

.about-timeline {
  position: relative;
  padding-top: 0.5rem;
}

.about-timeline__curve {
  display: none;
  width: 100%;
  height: 220px;
  margin-bottom: -8rem;
  opacity: 0.8;
}

.about-timeline__list {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline-item {
  position: relative;
  padding: 1.2rem 0 1.2rem 1.6rem;
  border-left: 1px solid var(--line);
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 1.65rem;
  left: -0.35rem;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--ink-900);
  border: 1px solid var(--mint);
  border-radius: 50%;
}

.timeline-item:nth-child(2)::before {
  border-color: var(--amber);
}

.timeline-item:nth-child(3)::before {
  border-color: var(--magenta);
}

.timeline-year {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.timeline-item h3 {
  margin: 0;
  font-size: 1.05rem;
}

.timeline-item p {
  max-width: 34rem;
  margin: 0.45rem 0 0;
  color: var(--mist);
  font-size: 0.92rem;
  line-height: 1.7;
}

.workflow-grid,
.check-grid,
.local-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.workflow-copy > p {
  margin: 0 0 1.4rem;
  color: var(--mist);
  line-height: 1.85;
}

.about-figure {
  margin: 0;
}

.about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.about-figure--wide img {
  aspect-ratio: 14 / 9;
}

.about-figure--side img {
  aspect-ratio: 3 / 2;
}

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

.about-figure__caption {
  display: block;
  margin-top: 0.7rem;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
}

.about-chapter--paper .about-figure__caption {
  color: rgba(23, 37, 31, 0.62);
}

.team-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.team-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s var(--ease), padding 0.25s var(--ease);
}

.team-row:hover {
  background: var(--about-mint-soft);
  padding-left: 0.6rem;
}

.team-row__index {
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.team-row__body h3 {
  margin: 0;
  font-size: 1rem;
}

.team-row__body p {
  margin: 0.35rem 0 0;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.7;
}

.team-row__tag {
  grid-column: 2;
  justify-self: start;
  margin-top: 0.35rem;
  padding: 0.22rem 0.45rem;
  color: var(--ink-900);
  background: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
}

.check-copy > p {
  color: rgba(23, 37, 31, 0.78);
  line-height: 1.85;
}

.check-steps {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.check-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  padding: 1rem 0;
  border-top: 1px solid var(--about-paper-line);
}

.check-step__num {
  color: #1F6A51;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.check-step__body h3 {
  margin: 0;
  font-size: 1rem;
}

.check-step__body p {
  margin: 0.35rem 0 0;
  color: rgba(23, 37, 31, 0.72);
  font-size: 0.9rem;
  line-height: 1.7;
}

.about-local {
  margin: clamp(2rem, 5vw, 4rem) 0;
  padding: clamp(1.5rem, 5vw, 4rem);
  background:
    radial-gradient(circle at 10% 20%, rgba(54, 241, 178, 0.08), transparent 30%),
    var(--ink-800);
  border: 1px solid var(--line);
}

.about-local .yd-section-num {
  -webkit-text-stroke-color: var(--amber);
}

.local-copy > p {
  color: var(--mist);
  line-height: 1.85;
}

.city-list {
  display: grid;
  gap: 0;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.city-node {
  border-bottom: 1px solid var(--line);
}

.city-node summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.78rem 0;
  color: var(--white);
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

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

.city-node summary::after {
  content: "+";
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 1rem;
  transition: transform 0.2s var(--ease);
}

.city-node[open] summary::after {
  content: "–";
}

.city-node p {
  margin: 0;
  padding: 0 0 0.85rem;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.7;
}

.city-tag {
  display: inline-block;
  margin-left: 0.45rem;
  padding: 0.18rem 0.4rem;
  border: 1px solid var(--amber);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  vertical-align: middle;
}

.local-visual {
  align-self: start;
}

.local-visual img {
  border-color: rgba(232, 179, 74, 0.4);
}

.about-coop {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
}

.coop-panel {
  padding: clamp(1.3rem, 4vw, 2.2rem);
  background: var(--ink-700);
  border: 1px solid var(--line);
}

.coop-panel--amber {
  background:
    linear-gradient(135deg, rgba(232, 179, 74, 0.16), transparent 50%),
    var(--ink-700);
  border-color: rgba(232, 179, 74, 0.5);
}

.coop-number {
  display: block;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: clamp(3.8rem, 10vw, 7rem);
  font-weight: 700;
  line-height: 0.9;
}

.coop-panel > p {
  max-width: 26rem;
  margin: 1rem 0 1.4rem;
  color: var(--mist);
  line-height: 1.8;
}

.coop-panel h3 {
  margin: 0 0 1rem;
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
}

.version-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.version-item {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 0.9rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}

.version-year {
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.version-body h4 {
  margin: 0;
  font-size: 0.98rem;
}

.version-body p {
  margin: 0.3rem 0 0;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.7;
}

.coop-links {
  margin: 1rem 0 0;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.8;
}

.coop-links a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.about-cta {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: clamp(2rem, 5vw, 4rem) 0 clamp(1rem, 3vw, 2rem);
  padding: clamp(1.5rem, 5vw, 3.4rem);
  background:
    linear-gradient(110deg, rgba(54, 241, 178, 0.16), transparent 36%),
    linear-gradient(290deg, rgba(255, 79, 135, 0.12), transparent 38%),
    var(--ink-800);
  border: 1px solid var(--line);
}

.about-cta__text h2 {
  max-width: 18ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.about-cta__text p:not(.yd-kicker) {
  max-width: 40rem;
  margin: 0.9rem 0 0;
  color: var(--mist);
  line-height: 1.8;
}

.about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (min-width: 720px) {
  .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

  .about-fact {
    grid-template-columns: 1fr;
    align-content: start;
    gap: 0.45rem;
    padding-top: 0.9rem;
  }

  .about-toc .yd-toc__list {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .about-timeline__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2rem;
  }

  .timeline-item:nth-child(3) {
    border-left-color: transparent;
  }

  .workflow-grid,
  .check-grid,
  .local-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .workflow-grid .about-figure {
    order: 2;
  }

  .workflow-grid .workflow-copy {
    order: 1;
  }

  .about-coop {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .about-cta {
    flex-direction: row;
    align-items: end;
    justify-content: space-between;
  }

  .about-cta__text {
    max-width: 42rem;
  }

  .about-cta__actions {
    flex: 0 0 auto;
    padding-bottom: 0.2rem;
  }

  .city-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 1.6rem;
  }
}

@media (min-width: 960px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr);
    align-items: end;
  }

  .about-hero__aside {
    margin-top: 4rem;
  }

  .about-shell {
    grid-template-columns: 13.5rem minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }

  .about-aside {
    position: sticky;
    top: 6.5rem;
  }

  .about-toc .yd-toc__list {
    display: grid;
    gap: 0.2rem;
  }

  .about-toc .yd-toc__link {
    justify-content: flex-start;
    white-space: normal;
  }

  .about-chapter__head {
    grid-template-columns: 8.5rem 1fr;
  }

  .about-timeline__curve {
    display: block;
  }

  .about-timeline__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 1.2rem;
  }

  .timeline-item {
    padding-left: 1.2rem;
  }

  .timeline-item:nth-child(3) {
    border-left-color: var(--line);
  }

  .about-local .local-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(16rem, 0.8fr);
  }

  .city-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc .yd-toc__link,
  .page-about .team-row,
  .page-about .city-node summary::after {
    transition: none;
  }
}
<<<END>>>