.page-about {
  --about-shadow: 6px 6px 0 rgba(6, 75, 74, 0.07);
  --about-shadow-hover: 8px 8px 0 rgba(6, 75, 74, 0.13);
  background: var(--c-mist);
  color: var(--c-text);
  font-family: var(--font-sans);
  line-height: 1.8;
  padding-bottom: 0;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-hero {
  padding: clamp(24px, 5vw, 52px) 0 clamp(34px, 6vw, 62px);
  background:
    radial-gradient(120% 90% at 84% 0%, rgba(95, 242, 214, 0.18), transparent 58%),
    linear-gradient(180deg, var(--c-mist) 0%, #E8F1EE 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-hero-copy .eyebrow {
  margin: 0 0 14px;
}

.page-about h1 {
  margin: 0 0 18px;
  max-width: 17em;
  font-size: clamp(1.85rem, 5.2vw, 3.2rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--c-water-deep);
}

.page-about .about-hero-copy p {
  margin: 0 0 14px;
  max-width: 38em;
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .about-lede {
  font-size: clamp(1.02rem, 1.7vw, 1.16rem);
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero-figure {
  margin: 0;
  padding: 10px 10px 0;
  background: var(--c-cream);
  border: 1px solid var(--line-strong);
  box-shadow: 10px 10px 0 rgba(6, 75, 74, 0.08);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.92);
}

.page-about .about-hero-figure .timestamp {
  display: block;
  margin: 10px 2px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-water);
}

.page-about .about-band {
  background: var(--c-ink);
  border-top: 3px solid var(--c-water);
  border-bottom: 1px solid var(--c-water-deep);
}

.page-about .about-band-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(95, 242, 214, 0.16);
}

.page-about .band-cell {
  background: var(--c-ink);
  padding: 22px 18px 24px;
}

.page-about .band-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-mint);
  font-variant-numeric: tabular-nums;
}

.page-about .band-unit {
  margin-left: 4px;
  font-size: 0.42em;
  letter-spacing: 0;
  color: var(--c-faint);
}

.page-about .band-label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-faint);
}

.page-about .about-story-section {
  padding: clamp(38px, 7vw, 76px) 0;
}

.page-about .about-story {
  display: grid;
  gap: 26px;
}

.page-about .about-rail {
  background: var(--c-cream);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-water);
  padding: 14px 12px 14px 16px;
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-water);
}

.page-about .about-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-rail-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail-list li {
  flex: 0 0 auto;
}

.page-about .about-rail-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 11px;
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--c-water-deep);
  background: var(--c-mist);
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-rail-list a:hover {
  transform: translateY(-2px);
  border-color: var(--c-water);
  background: #ffffff;
}

.page-about .about-rail-list a:focus-visible {
  outline: 2px solid var(--c-water);
  outline-offset: 2px;
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-water);
}

.page-about .about-flow {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-about .about-chapter {
  padding: 24px 20px 26px;
  background: var(--c-cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--about-shadow);
}

.page-about .about-chapter-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-strong);
}

.page-about .about-chapter-num {
  flex: 0 0 auto;
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-water-deep);
  background: var(--c-paper);
  border: 1px solid var(--line);
}

.page-about .about-chapter h2 {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-size: clamp(1.24rem, 2.6vw, 1.7rem);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--c-water-deep);
}

.page-about .about-chapter p {
  margin: 0 0 14px;
  font-size: 1rem;
  line-height: 1.85;
}

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

.page-about .about-facts {
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--line);
  display: grid;
  gap: 12px;
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-water);
}

.page-about .fact-label {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-text);
}

.page-about .about-stair {
  margin: 18px 0 0;
  padding: 16px 14px 10px;
  background: var(--c-ink);
  border-radius: var(--radius);
}

.page-about .about-stair-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-stair-caption {
  margin: 8px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-faint);
}

.page-about .about-entry-list {
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
}

.page-about .about-entry {
  padding: 12px 14px;
  background: var(--c-mist);
  border: 1px solid var(--line);
  border-top: 2px solid var(--c-water);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-entry:hover {
  transform: translateY(-2px);
  border-color: var(--c-water);
  box-shadow: 4px 4px 0 rgba(6, 75, 74, 0.09);
}

.page-about .about-entry dt {
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--c-water-deep);
}

.page-about .about-entry dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--c-text);
}

.page-about .about-steps {
  list-style: none;
  margin: 16px 0 0;
  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: 12px 14px;
  background: var(--c-mist);
  border-left: 3px solid var(--c-grass);
}

.page-about .step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--c-grass);
}

.page-about .about-steps strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
  color: var(--c-water-deep);
}

.page-about .step-desc {
  display: block;
  font-size: 13px;
  line-height: 1.72;
}

.page-about .about-version-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-version-list li {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .version-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-water);
}

.page-about .version-text {
  font-size: 13.5px;
  line-height: 1.75;
}

.page-about .about-figure {
  margin: 18px 0 0;
  padding: 8px 8px 0;
  background: #ffffff;
  border: 1px solid var(--line);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(0.94);
}

.page-about .about-figure figcaption {
  margin: 9px 4px 10px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--c-water);
}

.page-about .about-wall {
  padding: clamp(38px, 7vw, 72px) 0;
  background: var(--c-cream);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-wall-head .eyebrow {
  margin: 0 0 12px;
}

.page-about .about-wall-head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.42rem, 3.4vw, 2.1rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--c-water-deep);
}

.page-about .about-wall-head p {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-wall-grid {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-wall-item {
  padding: 18px 16px;
  background: var(--c-mist);
  border: 1px solid var(--line);
  box-shadow: 4px 4px 0 rgba(6, 75, 74, 0.06);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-wall-item:hover,
.page-about .about-wall-item:focus-within {
  transform: translateY(-2px);
  border-color: var(--c-water);
  box-shadow: var(--about-shadow-hover);
}

.page-about .wall-index {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-water);
}

.page-about .about-wall-item h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-water-deep);
}

.page-about .about-wall-item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-text);
}

.page-about .about-cta {
  padding: clamp(40px, 7vw, 68px) 0;
  background:
    linear-gradient(135deg, rgba(95, 242, 214, 0.12) 0%, transparent 55%),
    var(--c-water-deep);
  color: var(--c-mist);
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-faint);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-cta .btn-ghost {
  color: var(--c-mist);
  border-color: rgba(244, 248, 246, 0.55);
}

.page-about .about-cta .btn-ghost:hover,
.page-about .about-cta .btn-ghost:focus-visible {
  border-color: var(--c-mint);
  color: var(--c-mint);
}

.page-about .about-cta .btn-quiet {
  color: var(--c-mint);
}

@media (min-width: 640px) {
  .page-about .about-entry-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-version-list li {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

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

@media (min-width: 800px) {
  .page-about .about-band-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .band-cell {
    padding: 26px 22px 28px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
    gap: 48px;
  }

  .page-about .about-story {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    padding: 2px 0 2px 18px;
    background: transparent;
    border: 0;
    border-left: 1px solid var(--line-strong);
  }

  .page-about .about-rail-list {
    display: block;
    overflow: visible;
  }

  .page-about .about-rail-list li + li {
    margin-top: 14px;
  }

  .page-about .about-rail-list a {
    display: flex;
    padding: 2px 0;
    font-size: 14px;
    background: transparent;
    border: 0;
  }

  .page-about .about-rail-list a:hover {
    transform: translateX(3px);
    background: transparent;
  }

  .page-about .about-chapter {
    padding: 30px 30px 32px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-wall-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .about-chapter:nth-child(odd) {
    margin-right: 46px;
  }

  .page-about .about-chapter:nth-child(even) {
    margin-left: 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-list a,
  .page-about .about-entry,
  .page-about .about-wall-item {
    transition: none;
  }

  .page-about .about-rail-list a:hover,
  .page-about .about-entry:hover,
  .page-about .about-wall-item:hover,
  .page-about .about-wall-item:focus-within {
    transform: none;
  }
}