.page-about {
  --about-body: #2E3D49;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(16px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-about .breadcrumb a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--amber-deep);
  border-bottom-color: var(--amber-deep);
}

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

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(16px, 3vw, 28px);
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  padding: clamp(24px, 5vw, 56px);
  background: radial-gradient(130% 120% at 12% 0%, var(--navy-2) 0%, var(--navy) 64%);
  color: var(--paper);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 26px;
  right: 22px;
  bottom: 26px;
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--line-light) 0 1px, transparent 1px 14px);
  pointer-events: none;
}

.page-about .about-hero__main {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-about .kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(32px, 6.6vw, 64px);
  line-height: 1.08;
  max-width: 15em;
  color: var(--white);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 33em;
  font-size: clamp(15.5px, 1.9vw, 18px);
  line-height: 1.78;
  color: var(--aqua);
}

.page-about .about-hero__actions {
  margin-top: clamp(22px, 3vw, 30px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-facts {
  position: relative;
  z-index: 1;
  min-width: 0;
  align-self: start;
  padding: 18px 18px 14px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(8px);
}

.page-about .about-facts__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-facts dl {
  margin: 8px 0 0;
  display: grid;
  gap: 0;
}

.page-about .about-facts dl > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line-light);
}

.page-about .about-facts dl > div:last-child {
  border-bottom: 0;
}

.page-about .about-facts dt {
  font-size: 13px;
  color: var(--aqua);
  line-height: 1.5;
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 21px);
  color: var(--white);
  white-space: nowrap;
}

/* ---------- rail ---------- */
.page-about .about-rail {
  margin-top: clamp(18px, 3vw, 30px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-rail a {
  display: inline-block;
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about .about-rail a:hover,
.page-about .about-rail a:focus-visible {
  color: var(--amber-deep);
  border-color: var(--amber-deep);
}

/* ---------- section frame ---------- */
.page-about .about-section {
  margin-top: clamp(48px, 8vw, 100px);
}

.page-about .about-section__head {
  display: grid;
  gap: 10px;
  max-width: 46em;
}

.page-about .exhibit-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-about .exhibit-label__num {
  display: inline-block;
  padding: 3px 8px;
  background: var(--navy);
  color: var(--paper);
  border-radius: 2px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(25px, 4.4vw, 42px);
  line-height: 1.16;
  color: var(--ink);
}

.page-about .about-split {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  margin-top: clamp(20px, 3vw, 30px);
}

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

.page-about .about-text p {
  max-width: 34em;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-body);
}

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

.page-about .about-note {
  margin-top: 22px;
  padding: 12px 14px 12px 18px;
  max-width: 30em;
  border-left: 2px solid var(--amber);
  background: linear-gradient(90deg, rgba(230, 162, 60, 0.12), rgba(230, 162, 60, 0));
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--navy-2);
}

.page-about .about-note__cap {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--amber-deep);
}

.page-about .about-figure {
  margin: 0;
  min-width: 0;
}

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

.page-about .about-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- method band ---------- */
.page-about .about-band {
  margin-top: clamp(48px, 8vw, 100px);
  padding: clamp(34px, 6vw, 72px) 0;
  background: var(--aqua);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-steps {
  list-style: none;
  margin: 4px 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 15px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--amber-deep);
  padding-top: 2px;
}

.page-about .about-steps h3 {
  margin: 0 0 4px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15.5px;
  line-height: 1.4;
  color: var(--navy);
}

.page-about .about-steps p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--about-body);
}

/* ---------- timeline ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--stone) 0 6px, transparent 6px 13px);
  opacity: 0.5;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 32px;
  margin-bottom: 10px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--stone);
  box-sizing: border-box;
}

.page-about .about-timeline__item:last-child::before {
  border-color: var(--amber);
  background: var(--amber);
}

.page-about .about-event {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-event summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-event summary:hover {
  background: var(--mist);
}

.page-about .about-event__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--amber-deep);
}

.page-about .about-event__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15px;
  line-height: 1.45;
  color: var(--navy);
}

.page-about .about-event__plus {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--stone);
  transition: transform 0.22s ease, color 0.22s ease;
}

.page-about .about-event[open] .about-event__plus {
  transform: rotate(45deg);
  color: var(--amber-deep);
}

.page-about .about-event__body {
  padding: 0 15px 14px;
  border-top: 1px solid var(--line);
}

.page-about .about-event__body p {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- reach ---------- */
.page-about .about-reach {
  margin-top: clamp(48px, 8vw, 100px);
  padding: clamp(26px, 5vw, 56px);
  background: linear-gradient(160deg, var(--navy-2) 0%, var(--navy) 70%);
  color: var(--paper);
  border-radius: var(--radius);
}

.page-about .about-reach .exhibit-label {
  color: var(--aqua);
}

.page-about .about-reach .exhibit-label__num {
  background: var(--amber);
  color: var(--navy);
}

.page-about .about-reach h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(24px, 4.2vw, 40px);
  line-height: 1.18;
  color: var(--white);
}

.page-about .about-reach__lead {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--aqua);
}

.page-about .about-stats {
  margin-top: clamp(22px, 3vw, 30px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .about-stat {
  padding: 16px 14px;
  background: rgba(11, 34, 57, 0.92);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: clamp(25px, 4.6vw, 38px);
  color: var(--white);
  line-height: 1.1;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--aqua);
}

.page-about .about-reach__note {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 243, 232, 0.82);
}

/* ---------- partners ---------- */
.page-about .about-partners {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 12px;
}

.page-about .about-partner {
  min-width: 0;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--navy);
  border-radius: var(--radius);
}

.page-about .about-partner--award {
  border-top-color: var(--amber);
  background: linear-gradient(180deg, rgba(230, 162, 60, 0.1), var(--white) 60%);
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  color: var(--navy);
}

.page-about .about-partner--award .about-partner__num {
  color: var(--amber-deep);
}

.page-about .about-partner h3 {
  margin: 10px 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15.5px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--about-body);
}

/* ---------- next ---------- */
.page-about .about-next {
  margin-top: clamp(44px, 7vw, 88px);
  padding-top: clamp(22px, 4vw, 34px);
  border-top: 1px solid var(--line);
}

.page-about .about-next h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-next__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-next__list li {
  min-width: 0;
}

.page-about .about-next__list a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 15px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-next__list a > span:first-child {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15px;
  color: var(--navy);
}

.page-about .about-next__desc {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  border-color: var(--amber-deep);
  transform: translateY(-2px);
}

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-facts {
    margin-top: 34px;
    margin-right: 18px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .about-section .about-split {
    margin-top: clamp(24px, 3vw, 36px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-event__plus,
  .page-about .about-next__list a {
    transition: none;
  }
}
<<<END>>>