.page-about {
  --about-narrow: 620px;
  --about-aside: 200px;
  background: var(--water);
  color: var(--ink);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 48px) 0 clamp(56px, 9vw, 120px);
  color: var(--paper);
  background-color: var(--deep);
  background-image:
    linear-gradient(rgba(127, 163, 184, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 163, 184, .12) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(112deg, transparent 49.86%, rgba(127, 163, 184, .28) 49.94%, transparent 50.02%);
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(36px, 6vw, 64px);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-about .breadcrumb__item {
  color: var(--coord);
  text-decoration: none;
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--paper);
  font-weight: 600;
}

.page-about .breadcrumb__item:hover {
  color: var(--accent-soft);
}

.page-about .breadcrumb__sep {
  color: var(--deep-lift);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-hero__meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.page-about .about-hero .index-tag {
  color: var(--coord);
}

.page-about .about-hero__since {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--coord);
}

.page-about .about-hero__axis {
  width: 1px;
  height: 72px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.page-about .about-hero__body .display {
  margin: 0 0 28px;
  color: var(--paper);
  font-size: clamp(52px, 11vw, 136px);
  letter-spacing: -.03em;
}

.page-about .about-hero__body .lede {
  max-width: 600px;
  margin: 0;
  color: rgba(255, 255, 255, .82);
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 36px;
  margin-top: clamp(36px, 5vw, 56px);
  padding-top: 24px;
  border-top: 1px solid var(--deep-lift);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__num {
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1;
  color: var(--data);
  font-weight: 600;
}

.page-about .about-stat__label {
  font-size: 13px;
  color: var(--coord);
  letter-spacing: .05em;
}

.page-about .about-chapter {
  padding: clamp(56px, 9vw, 110px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-chapter--paper {
  background: var(--paper);
}

.page-about .about-chapter--water {
  background: var(--water);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-chapter__aside {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.page-about .about-chapter__tick {
  width: 1px;
  height: clamp(56px, 10vw, 120px);
  background: var(--line);
}

.page-about .about-chapter__main h2 {
  margin: 0 0 24px;
  color: var(--deep);
  font-size: var(--fs-h2);
  line-height: 1.18;
  letter-spacing: -.01em;
}

.page-about .about-chapter__main > p {
  max-width: var(--about-narrow);
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.8;
}

.page-about .about-chapter__main > p + p {
  margin-top: 18px;
}

.page-about .about-pull {
  margin-top: 36px !important;
  padding-left: 18px;
  border-left: 2px solid var(--accent);
  color: var(--deep);
  font-size: clamp(20px, 2.4vw, 26px) !important;
  font-weight: 600;
  line-height: 1.5 !important;
  max-width: 560px;
}

.page-about .about-timeline__axis {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 40px;
  color: var(--line);
  overflow: visible;
}

.page-about .about-timeline__axis line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-timeline__axis circle {
  fill: var(--accent);
}

.page-about .about-timeline__axis circle:last-child {
  fill: var(--data);
}

.page-about .about-timeline {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0 20px 22px;
  border-bottom: 1px solid var(--line);
  outline: none;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 30px;
  width: 8px;
  height: 8px;
  background: var(--coord);
  transition: background-color .18s var(--ease);
}

.page-about .about-timeline li:hover::before,
.page-about .about-timeline li:focus-within::before {
  background: var(--accent);
}

.page-about .about-timeline__year {
  padding-top: 2px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--coord);
}

.page-about .about-timeline__body h3 {
  margin: 0;
  color: var(--deep);
  font-size: var(--fs-h3);
  line-height: 1.4;
}

.page-about .about-timeline__note {
  margin: 8px 0 0;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.7;
  color: #4c6474;
}

.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-top: 36px;
}

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

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

.page-about .about-step__summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  color: var(--deep);
}

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

.page-about .about-step__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--accent);
}

.page-about .about-step[open] .about-step__summary::after {
  content: "−";
}

.page-about .about-step__idx {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--coord);
}

.page-about .about-step__body {
  padding: 0 0 20px 40px;
}

.page-about .about-step__body p {
  max-width: var(--about-narrow);
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: #334854;
}

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

.page-about .figure__media {
  overflow: hidden;
  background: var(--deep-lift);
}

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

.page-about .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--coord);
}

.page-about .about-scale {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 40px;
  border-top: 1px solid var(--line);
}

.page-about .about-scale__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 16px 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-scale__num {
  font-size: clamp(40px, 6vw, 68px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--deep);
  font-family: var(--font-sans);
}

.page-about .about-scale__num small {
  margin-left: 2px;
  font-size: .32em;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--coord);
}

.page-about .about-scale__label {
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--coord);
}

.page-about .about-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 40px;
}

.page-about .about-gallery figure {
  margin: 0;
}

.page-about .about-gallery .figure__media img {
  aspect-ratio: 900 / 600;
}

.page-about .about-team {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__idx {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--accent);
  border-top: 2px solid var(--accent);
  height: 18px;
}

.page-about .about-team__role {
  margin: 0 0 8px;
  font-size: var(--fs-h3);
  color: var(--deep);
}

.page-about .about-team__item p {
  margin: 0;
  max-width: 560px;
  font-size: 15.5px;
  line-height: 1.75;
  color: #334854;
}

.page-about .about-team__note {
  max-width: var(--about-narrow);
  margin: 32px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--data);
  font-size: 15.5px;
  line-height: 1.8;
  color: #334854;
}

.page-about .about-eco {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 9vw, 110px) 0;
  color: var(--paper);
  background-color: var(--deep);
  background-image:
    linear-gradient(rgba(23, 69, 107, .55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 69, 107, .55) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-eco .index-tag {
  color: var(--coord);
}

.page-about .about-eco h2 {
  margin: 18px 0 0;
  color: var(--paper);
  font-size: var(--fs-h2);
  line-height: 1.2;
  max-width: 560px;
}

.page-about .about-eco__body p {
  max-width: var(--about-narrow);
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: rgba(255, 255, 255, .8);
}

.page-about .about-eco__body p + p {
  margin-top: 18px;
}

.page-about .about-eco__links {
  display: flex;
  flex-direction: column;
  margin-top: 28px;
  border-top: 1px solid var(--deep-lift);
}

.page-about .about-eco__links a {
  padding: 14px 0;
  border-bottom: 1px solid var(--deep-lift);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-about .about-eco__links a:hover {
  padding-left: 6px;
  color: var(--accent-soft);
}

.page-about .about-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--deep-lift);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 540px;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-cta .btn--primary {
  color: var(--deep);
  background: var(--accent);
  border-color: var(--accent);
}

.page-about .about-cta .btn--primary:hover {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
}

@media (min-width: 720px) {
  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-scale__item {
    padding-right: 20px;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-scale__item:last-child {
    border-right: 0;
  }

  .page-about .about-gallery {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 28px;
  }

  .page-about .about-gallery figure:nth-child(2) {
    margin-top: 56px;
  }

  .page-about .about-eco__links {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0 28px;
  }

  .page-about .about-eco__links a {
    border-bottom: 0;
  }

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

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(170px, var(--about-aside)) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(170px, var(--about-aside)) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-chapter__aside {
    display: block;
  }

  .page-about .about-chapter__tick {
    margin-top: 18px;
    height: clamp(80px, 12vw, 150px);
  }

  .page-about .about-timeline__axis {
    margin-top: 48px;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 1fr) minmax(280px, .78fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(240px, 5fr) minmax(0, 7fr);
    gap: 48px;
  }
}

@media (min-width: 980px) and (hover: hover) {
  .page-about .about-timeline__note {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .22s var(--ease), opacity .22s var(--ease), margin-top .22s var(--ease);
  }

  .page-about .about-timeline li:hover .about-timeline__note,
  .page-about .about-timeline li:focus-within .about-timeline__note {
    max-height: 120px;
    margin-top: 8px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline li::before,
  .page-about .about-eco__links a {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>