.page-about{
  --about-stick: calc(var(--header-h) + 28px);
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-crumb{
  padding-top: clamp(14px, 2vw, 22px);
}
.page-about .breadcrumb a{
  color: var(--muted);
  text-decoration: none;
  transition: color .24s var(--ease);
}
.page-about .breadcrumb a:hover{
  color: var(--ink);
}

/* ---------- Hero ---------- */
.page-about .about-hero{
  padding-top: clamp(12px, 2vw, 24px);
}
.page-about .hero-grid{
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}
.page-about .hero-rail{
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--muted);
}
.page-about .hero-rail .annot{
  font-size: 12px;
  letter-spacing: .16em;
  border-left: 1px solid var(--line);
  padding-left: 12px;
}
.page-about .hero-kicker{
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--stand);
  font-weight: 700;
}
.page-about .hero-body .display{
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(40px, 9vw, 88px);
  line-height: .96;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--ink);
}
.page-about .hero-lede{
  margin: 0 0 24px;
  max-width: 34em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: #2c333a;
}
.page-about .hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .hero-figure{
  margin: 0;
}
.page-about .hero-figure img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--night);
}
.page-about .hero-figure figcaption{
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .hero-stats{
  margin-top: clamp(28px, 5vw, 56px);
  background: var(--night);
  color: var(--mist);
}
.page-about .stats-row{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-night);
  padding-block: clamp(18px, 3vw, 28px);
}
.page-about .stat{
  background: var(--night);
  padding: 10px 16px;
}
.page-about .stat-num{
  display: block;
  font-family: var(--font-num);
  font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1;
  color: var(--neon);
  letter-spacing: -.02em;
}
.page-about .stat-label{
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: rgba(248, 249, 244, .74);
}

/* ---------- Chapter shell ---------- */
.page-about .chapter-block{
  padding-block: clamp(44px, 7vw, 96px);
  border-top: 1px solid var(--line);
}
.page-about .chapter-block--snow{
  background: var(--snow);
}
.page-about .chapter-block--sand{
  background: var(--sand);
}
.page-about .chapter-block--night{
  background: var(--night);
  color: var(--mist);
  border-top-color: rgba(185, 196, 200, .22);
}
.page-about .chapter{
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}
.page-about .chapter-rail{
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.page-about .chapter-idx{
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--stand);
}
.page-about .chapter-rail .annot{
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--muted);
}
.page-about .chapter-block--night .chapter-rail .annot{
  color: rgba(248, 249, 244, .6);
}
.page-about .chapter-title{
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -.015em;
  font-weight: 800;
  max-width: 18em;
}
.page-about .chapter-text{
  max-width: 680px;
}
.page-about .chapter-text p{
  margin: 0 0 16px;
  font-size: clamp(15.5px, 1.2vw, 17px);
  line-height: 1.8;
}
.page-about .chapter-text p:last-child{
  margin-bottom: 0;
}
.page-about .chapter-block--night .chapter-text p{
  color: rgba(248, 249, 244, .8);
}
.page-about .chapter-main [data-reveal]{
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}

/* ---------- Fact row ---------- */
.page-about .fact-row{
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .fact-row li{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.page-about .fact-key{
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}
.page-about .fact-val{
  font-family: var(--font-num);
  font-size: 16px;
  color: var(--ink);
}

/* ---------- City network ---------- */
.page-about .network-grid{
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: 26px;
}
.page-about .map-wrap{
  border: 1px solid var(--line);
  background: var(--mist);
  padding: clamp(8px, 1.6vw, 18px);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(18, 20, 23, .04);
}
.page-about .city-map{
  display: block;
  width: 100%;
  height: auto;
}
.page-about .map-shape{
  fill: rgba(11, 23, 42, .06);
  stroke: rgba(11, 23, 42, .22);
  stroke-width: 1;
  stroke-linejoin: round;
}
.page-about .map-pin circle{
  fill: var(--night);
  transition: fill .24s var(--ease);
}
.page-about .map-pin text{
  font-family: var(--font-num);
  font-size: 11px;
  fill: var(--muted);
  letter-spacing: .02em;
}
.page-about .map-pin--first circle{
  fill: var(--stand);
}
.page-about .map-pin--first text{
  fill: var(--stand);
  font-weight: 700;
}
.page-about .map-pin:hover circle{
  fill: var(--neon);
}

.page-about .city-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  align-content: start;
}
.page-about .city-list li{
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 2px 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .24s var(--ease), border-color .24s var(--ease);
}
.page-about .city-list li:hover{
  padding-left: 8px;
  border-color: rgba(18, 20, 23, .3);
}
.page-about .city-no{
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--stand);
  padding-top: 3px;
}
.page-about .city-name{
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .city-tag{
  grid-column: 2;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- Method layers ---------- */
.page-about .layer-list{
  margin-top: 26px;
  border-top: 1px solid var(--line);
}
.page-about .layer{
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .24s var(--ease), background .24s var(--ease);
}
.page-about .layer:hover{
  padding-left: 12px;
  background: rgba(184, 255, 61, .16);
}
.page-about .layer-no{
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--stand);
  padding-top: 4px;
}
.page-about .layer-title{
  margin: 0 0 6px;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .layer p{
  margin: 0;
  max-width: 620px;
  font-size: 15px;
  line-height: 1.75;
  color: #3d464e;
}

/* ---------- Timeline ---------- */
.page-about .timeline-figure{
  margin: 26px 0 4px;
}
.page-about .timeline-figure img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  opacity: .92;
}
.page-about .timeline{
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-night);
}
.page-about .tl-item{
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-night);
  transition: padding-left .28s var(--ease), background .28s var(--ease);
}
.page-about .tl-item:hover{
  padding-left: 12px;
  background: rgba(248, 249, 244, .05);
}
.page-about .tl-year{
  font-family: var(--font-num);
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.1;
  color: var(--neon);
  padding-top: 3px;
}
.page-about .tl-body{
  min-width: 0;
}
.page-about .tl-item h3{
  margin: 0 0 5px;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.4;
}
.page-about .tl-item p{
  margin: 0;
  max-width: 640px;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(248, 249, 244, .74);
}

/* ---------- Team ---------- */
.page-about .team-grid{
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: 18px;
}
.page-about .team-copy .chapter-text{
  max-width: none;
}
.page-about .team-list{
  list-style: none;
  margin: 22px 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .team-list li{
  padding-left: 16px;
  border-left: 2px solid var(--stand);
}
.page-about .team-list strong{
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .team-list span{
  display: block;
  margin-top: 2px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .team-note{
  margin: 0;
  padding: 15px 17px;
  background: rgba(184, 255, 61, .26);
  border-left: 3px solid var(--neon);
  font-size: 15px;
  line-height: 1.72;
}
.page-about .team-figure{
  margin: 0;
}
.page-about .team-figure img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* ---------- Partners ---------- */
.page-about .eco-grid{
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  margin-top: 22px;
}
.page-about .eco-copy p{
  margin: 0 0 14px;
  font-size: clamp(15.5px, 1.2vw, 17px);
  line-height: 1.8;
}
.page-about .eco-copy .btn{
  margin-top: 6px;
}
.page-about .eco-tags{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}
.page-about .eco-tag{
  display: inline-block;
  padding: 9px 14px;
  background: var(--mist);
  border: 1px solid rgba(18, 20, 23, .24);
  border-radius: var(--radius);
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--ink);
  transition: transform .24s var(--ease), border-color .24s var(--ease), background .24s var(--ease);
}
.page-about .eco-tag:hover{
  transform: translateY(-2px);
  border-color: var(--ink);
  background: var(--neon);
}

/* ---------- Closing CTA ---------- */
.page-about .about-cta{
  position: relative;
  overflow: hidden;
  background: var(--night);
  color: var(--mist);
  padding-block: clamp(48px, 8vw, 100px);
}
.page-about .about-cta::before{
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, rgba(184, 255, 61, .16), transparent 56%),
    radial-gradient(circle at 86% 18%, rgba(255, 106, 42, .24), transparent 62%);
  pointer-events: none;
}
.page-about .cta-inner{
  position: relative;
}
.page-about .cta-title{
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 800;
  max-width: 16em;
}
.page-about .cta-text{
  margin: 0 0 26px;
  max-width: 44em;
  font-size: clamp(15.5px, 1.3vw, 17px);
  line-height: 1.8;
  color: rgba(248, 249, 244, .8);
}
.page-about .cta-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta .btn--ghost{
  color: var(--mist);
  border-color: rgba(248, 249, 244, .42);
}
.page-about .about-cta .btn--ghost:hover{
  color: var(--neon);
  border-color: var(--neon);
}

/* ---------- Reveal ---------- */
.page-about [data-reveal]{
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}
.page-about [data-reveal][data-reveal-ready]:not([data-revealed]){
  opacity: 0;
  transform: translateY(14px);
}

/* ---------- Media queries ---------- */
@media (min-width: 720px){
  .page-about .stats-row{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .fact-row{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .fact-row li{
    display: block;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 0 0 0 14px;
  }
  .page-about .fact-key{
    display: block;
    margin-bottom: 4px;
  }
  .page-about .tl-item{
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
  }
}

@media (min-width: 860px){
  .page-about .network-grid{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .eco-grid{
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
    align-items: start;
  }
  .page-about .team-grid{
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: start;
  }
}

@media (min-width: 1000px){
  .page-about .hero-grid{
    grid-template-columns: 56px minmax(0, 1fr) minmax(0, 1.06fr);
    gap: clamp(24px, 3.2vw, 48px);
    align-items: start;
  }
  .page-about .hero-rail{
    display: block;
    writing-mode: vertical-rl;
    color: var(--muted);
    padding-top: 4px;
  }
  .page-about .hero-rail .annot{
    display: block;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 14px 0 0;
    margin-bottom: 16px;
    font-size: 11.5px;
  }
  .page-about .hero-figure img{
    clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
  }
  .page-about .chapter{
    grid-template-columns: 172px minmax(0, 1fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }
  .page-about .chapter-rail{
    position: sticky;
    top: var(--about-stick);
    display: block;
    border-left: 1px solid var(--line);
    padding-left: 14px;
  }
  .page-about .chapter-block--night .chapter-rail{
    border-left-color: var(--line-night);
  }
  .page-about .chapter-rail .annot{
    display: block;
    margin-top: 8px;
  }
  .page-about .layer{
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 12px 22px;
    padding: 24px 0;
  }
}

@media (min-width: 1200px){
  .page-about .city-list li{
    grid-template-columns: 30px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition-duration: .01ms !important;
  }
  .page-about [data-reveal][data-reveal-ready]:not([data-revealed]){
    opacity: 1;
    transform: none;
  }
}
<<<END>>>