.page-about {
  --about-rail-w: 150px;
  --about-hair: rgba(10, 26, 34, 0.14);
  --about-hair-strong: rgba(10, 26, 34, 0.34);
  --about-gap: clamp(20px, 3vw, 44px);
  background-color: var(--foam);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about a:focus-visible,
.page-about .about-note:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

.page-about .meta-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- top bar ---------- */

.page-about .about-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-block: 13px;
  border-bottom: 1px solid var(--about-hair);
}

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

/* ---------- hero ---------- */

.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding-block: clamp(26px, 4.5vw, 58px) clamp(30px, 5vw, 64px);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero__rail {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-left: 14px;
  border-left: 3px solid var(--coral);
}

.page-about .about-hero__no {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 0.9;
  color: var(--coral);
}

.page-about .about-hero__anno {
  margin: 2px 0 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--salt);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(1.85rem, 4.6vw, 3.4rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--navy-900);
  max-width: 24ch;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.2vw, 17.5px);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-fact {
  background: var(--foam);
  padding: 13px 15px;
}

.page-about .about-fact dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--salt);
  font-weight: 600;
}

.page-about .about-fact dd {
  margin: 5px 0 0;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--navy-900);
}

/* ---------- sticky chapter index ---------- */

.page-about .about-index {
  position: sticky;
  top: 0;
  z-index: 6;
  background: var(--navy-900);
  border-block: 1px solid var(--hair-light);
}

.page-about .about-index__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-block: 9px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__label {
  flex: none;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--sand);
}

.page-about .about-index__list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px solid transparent;
  color: var(--foam);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--coral);
  border-color: var(--coral);
  outline: none;
}

.page-about .about-index__list .meta-mono {
  font-size: 10px;
  color: var(--mist);
}

/* ---------- sections ---------- */

.page-about .about-section {
  padding-block: clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--about-hair);
  scroll-margin-top: 66px;
}

.page-about .about-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-rail__num {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--navy-900);
}

.page-about .about-rail__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--salt);
}

.page-about .about-rail__line {
  display: none;
}

.page-about .about-title {
  margin: 0 0 18px;
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--navy-900);
  max-width: 26ch;
}

.page-about .about-body p {
  margin: 0 0 16px;
  max-width: 66ch;
}

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

.page-about .about-body a {
  color: var(--navy-700);
  text-decoration: underline;
  text-decoration-color: var(--coral);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .about-body a:hover {
  color: var(--coral-deep);
}

/* ---------- figure ---------- */

.page-about .about-figure {
  margin: 24px 0 0;
  border: 1px solid var(--about-hair);
  background: var(--foam);
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--about-hair);
  background: var(--sand);
  color: var(--ink);
  font-size: 12px;
  line-height: 1.6;
}

/* ---------- tags ---------- */

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tags li {
  padding: 4px 10px;
  border: 1px solid var(--about-hair-strong);
  color: var(--navy-700);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- layers ---------- */

.page-about .about-layers {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
}

.page-about .about-layer {
  padding: 15px 17px;
  border-left: 3px solid var(--coral);
  background: rgba(217, 199, 160, 0.26);
  transition: background-color 240ms var(--ease);
}

.page-about .about-layer--tide {
  border-left-color: var(--tide);
}

.page-about .about-layer--sand {
  border-left-color: var(--sand);
}

.page-about .about-layer__k {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--salt);
}

.page-about .about-layer__title {
  margin: 5px 0 7px;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--navy-900);
}

.page-about .about-layer__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--salt);
}

/* ---------- phases / timeline ---------- */

.page-about .about-phases {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair-strong);
}

.page-about .about-phase {
  position: relative;
  padding-top: 24px;
}

.page-about .about-phase__dot {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--coral);
}

.page-about .about-phase__stage {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--coral-deep);
}

.page-about .about-phase__title {
  margin: 6px 0 8px;
  font-size: var(--fs-h3);
  font-weight: 700;
  line-height: 1.3;
  color: var(--navy-900);
}

.page-about .about-phase__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--salt);
}

/* ---------- gates ---------- */

.page-about .about-gates {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 22px 0 0;
}

.page-about .about-gate {
  padding: 15px 17px;
  border: 1px solid var(--about-hair);
  border-top: 2px solid var(--navy-700);
  background: var(--foam);
  transition: border-top-color 240ms var(--ease);
}

.page-about .about-gate:hover {
  border-top-color: var(--coral);
}

.page-about .about-gate__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--tide);
}

.page-about .about-gate h3 {
  margin: 6px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy-900);
}

.page-about .about-gate p {
  margin: 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.7;
  color: var(--salt);
}

/* ---------- note strip ---------- */

.page-about .about-note {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding: 15px 17px;
  background: var(--sand);
  border-left: 4px solid var(--navy-900);
  transition: border-left-color 240ms var(--ease);
}

.page-about .about-note:hover,
.page-about .about-note:focus-within {
  border-left-color: var(--coral);
}

.page-about .about-note__k {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.page-about .about-note__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.page-about .about-note__item {
  font-family: var(--font-mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

/* ---------- stations & partners ---------- */

.page-about .about-stations {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-stations li {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 13px 15px;
  background: var(--foam);
  font-weight: 600;
  color: var(--navy-900);
}

.page-about .about-stations .meta-mono {
  font-size: 11px;
  color: var(--coral-deep);
}

.page-about .about-partners {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 22px 0 0;
}

.page-about .about-partner {
  flex: 1 1 140px;
  padding-top: 10px;
  border-top: 2px solid var(--tide);
}

.page-about .about-partner__num {
  display: block;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--navy-900);
}

.page-about .about-partner__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--salt);
}

/* ---------- honors ---------- */

.page-about .about-honors {
  display: grid;
  gap: 1px;
  margin: 20px 0 20px;
  padding: 0;
  list-style: none;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-honors li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 13px 15px;
  background: var(--foam);
}

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

.page-about .about-honors__v {
  font-size: 15px;
  font-weight: 600;
  color: var(--navy-900);
}

/* ---------- cta ---------- */

.page-about .about-cta {
  background: var(--navy-900);
  color: var(--foam);
  padding-block: clamp(34px, 5vw, 62px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 16px;
}

.page-about .about-cta h2 {
  margin: 0;
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.2;
  color: var(--foam);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 58ch;
  color: var(--mist);
  font-size: var(--fs-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 6px;
}

.page-about .about-cta__links a {
  color: var(--sand);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--coral);
  padding-bottom: 2px;
}

.page-about .about-cta__links a:hover {
  color: var(--coral);
}

/* ---------- media queries ---------- */

@media (min-width: 640px) {
  .page-about .about-layers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--about-hair);
    border: 1px solid var(--about-hair);
  }

  .page-about .about-layer {
    border-left-width: 0;
    border-top: 3px solid var(--coral);
    background: var(--foam);
  }

  .page-about .about-layer--tide {
    border-top-color: var(--tide);
  }

  .page-about .about-layer--sand {
    border-top-color: var(--sand);
  }

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

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

  .page-about .about-phases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 22px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: minmax(120px, 18%) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    gap: 16px;
    padding-top: 8px;
  }

  .page-about .about-hero__anno {
    writing-mode: vertical-rl;
    letter-spacing: 0.24em;
    margin-top: 4px;
  }

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

  .page-about .about-row {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-top: 4px;
  }

  .page-about .about-rail__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }

  .page-about .about-rail__line {
    display: block;
    width: 1px;
    height: 62px;
    margin-top: 4px;
    background: var(--about-hair-strong);
  }

  .page-about .about-body {
    padding-right: 2%;
  }
}

@media (min-width: 1060px) {
  .page-about .about-phases {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    column-gap: 40px;
  }

  .page-about .about-cta__inner > h2,
  .page-about .about-cta__inner > p {
    grid-column: 1;
  }

  .page-about .about-cta__actions,
  .page-about .about-cta__links {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-layer,
  .page-about .about-gate,
  .page-about .about-note {
    transition: none;
  }
}
<<<END>>>