.page-about {
  --about-gutter: clamp(20px, 4vw, 48px);
  --about-max: 1320px;
  --about-line: #D6CEC6;
  --about-node-offset: 84px;
  overflow-x: clip;
}

.page-about .about-hero {
  position: relative;
  border-bottom: 1px solid var(--color-line);
  padding-block: clamp(40px, 6vw, 88px) clamp(32px, 5vw, 72px);
  background-image:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: center top;
}

.page-about .about-hero__topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--about-max);
  margin-inline: auto;
  padding-inline: var(--about-gutter);
  margin-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-hero__layout {
  display: flex;
  flex-direction: column;
  gap: 36px;
  max-width: var(--about-max);
  margin-inline: auto;
  padding-inline: var(--about-gutter);
}

.page-about .about-hero__toc {
  border-left: 2px solid var(--color-accent);
  padding-left: 20px;
  flex: 0 0 220px;
}

.page-about .about-hero__toc-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-muted);
  margin: 0 0 16px;
}

.page-about .about-hero__toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero__toc li + li {
  margin-top: 12px;
}

.page-about .about-hero__toc a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-ink);
  text-decoration: none;
}

.page-about .about-hero__toc a span {
  color: var(--color-accent);
}

.page-about .about-hero__toc a:hover {
  color: var(--color-brand);
}

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

.page-about .about-hero__main h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 8vw, 76px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--color-brand);
  margin: 0 0 8px;
}

.page-about .about-hero__subtitle {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 24px;
}

.page-about .about-hero__lead {
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--color-ink);
  max-width: 42em;
  margin: 0;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 48px);
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
}

.page-about .about-hero__stats span {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
}

.page-about .about-hero__stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-brand);
}

.page-about .about-position,
.page-about .about-history,
.page-about .about-zones {
  max-width: var(--about-max);
  margin-inline: auto;
  padding-inline: var(--about-gutter);
}

.page-about .about-position__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-position__intro,
.page-about .about-position__copy p {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ink);
}

.page-about .about-position__copy {
  margin-top: 24px;
}

.page-about .about-position__link,
.page-about .zones-side__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-brand);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 4px;
  margin-top: 24px;
}

.page-about .about-position__facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  margin: 0;
}

.page-about .fact-item {
  background: var(--color-bg-alt);
  padding: 24px 22px;
  margin: 0;
  min-width: 0;
}

.page-about .fact-item dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-steel);
  margin-bottom: 12px;
}

.page-about .fact-item dd {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.35;
  margin: 0;
}

.page-about .about-history__lead {
  margin: clamp(32px, 5vw, 56px) 0;
  max-width: 960px;
}

.page-about .about-history__grid {
  display: grid;
  gap: 40px;
}

.page-about .history-index {
  display: none;
  position: sticky;
  top: 112px;
  align-self: start;
  border-top: 2px solid var(--color-accent);
  padding-top: 16px;
}

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

.page-about .history-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .history-index a {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px dotted var(--color-line);
}

.page-about .history-index a:hover {
  color: var(--color-brand);
}

.page-about .history-rows {
  position: relative;
  min-width: 0;
}

.page-about .history-rows::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: var(--about-node-offset);
  width: 1px;
  background: var(--color-line);
}

.page-about .history-row {
  display: grid;
  grid-template-columns: 56px 28px minmax(0, 1fr);
  column-gap: 14px;
  align-items: start;
  padding-block: clamp(24px, 3.5vw, 40px);
  border-bottom: 1px solid var(--color-line);
}

.page-about .history-row:first-child {
  padding-top: 4px;
  border-bottom-color: var(--color-line);
}

.page-about .history-row__year {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-brand);
}

.page-about .history-row__node {
  display: flex;
  justify-content: center;
  padding-top: 4px;
  color: var(--color-accent);
}

.page-about .history-row__node svg {
  width: 20px;
  height: 20px;
}

.page-about .history-row__node rect {
  fill: currentColor;
}

.page-about .history-row__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-steel);
  margin-bottom: 10px;
}

.page-about .history-row__content h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0 0 10px;
}

.page-about .history-row__content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-ink);
  max-width: 56em;
  margin: 0;
}

.page-about .about-zones__grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .zones-quad {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.page-about .zone-cell {
  display: flex;
  flex-direction: column;
  min-height: 220px;
  padding: clamp(20px, 3vw, 36px);
  background: var(--color-bg);
  color: var(--color-ink);
  text-decoration: none;
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .zone-cell:hover {
  background: var(--color-bg-alt);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  z-index: 1;
}

.page-about .zone-cell__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: auto;
}

.page-about .zone-cell__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  color: var(--color-brand);
  margin: 0 0 10px;
  line-height: 1.1;
}

.page-about .zone-cell__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 24em;
}

.page-about .zone-cell__coord {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-steel);
  opacity: 1;
  transition: opacity 0.25s ease;
}

@media (hover: hover) {
  .page-about .zone-cell__coord {
    opacity: 0;
  }
  .page-about .zone-cell:hover .zone-cell__coord {
    opacity: 1;
  }
}

.page-about .zones-side__note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 16px 0 0;
  max-width: 38em;
}

.page-about .about-jiangxi {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-jiangxi__grid {
  display: grid;
  gap: 40px;
  max-width: var(--about-max);
  margin-inline: auto;
  padding: var(--section-space) var(--about-gutter);
}

.page-about .about-jiangxi__art {
  position: relative;
}

.page-about .jiangxi-svg {
  position: absolute;
  top: -24px;
  left: -24px;
  width: calc(100% + 48px);
  height: calc(100% + 24px);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-jiangxi__art .visual-frame {
  position: relative;
  z-index: 1;
}

.page-about .about-jiangxi__lead {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-brand);
  margin: 0 0 24px;
}

.page-about .about-jiangxi__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.page-about .about-jiangxi__list li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-ink);
}

.page-about .about-jiangxi__list span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
}

.page-about .about-jiangxi__note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 0;
  max-width: 38em;
}

.page-about .about-values {
  background: var(--color-brand);
  color: var(--color-on-dark);
}

.page-about .about-values .section-head {
  max-width: var(--about-max);
  margin-inline: auto;
  padding-inline: var(--about-gutter);
}

.page-about .about-values .section-label {
  color: var(--color-accent-light);
}

.page-about .about-values .section-title {
  color: var(--color-on-dark);
}

.page-about .about-values .section-lead {
  color: var(--color-on-dark);
  opacity: 0.88;
}

.page-about .about-values__grid {
  display: grid;
  gap: 20px;
  max-width: var(--about-max);
  margin: clamp(36px, 5vw, 56px) auto 0;
  padding-inline: var(--about-gutter);
}

.page-about .value-card {
  background: var(--color-brand-deep);
  border: 1px solid rgba(248, 244, 240, 0.18);
  padding: clamp(24px, 3vw, 32px);
  display: flex;
  flex-direction: column;
  min-height: 260px;
}

.page-about .value-card__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.page-about .value-card h3 {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  color: var(--color-on-dark);
  margin: 0 0 12px;
}

.page-about .value-card p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-on-dark);
  opacity: 0.9;
  margin: 0 0 24px;
}

.page-about .value-card__link {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--color-accent-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(218, 165, 32, 0.55);
  padding-bottom: 4px;
  align-self: flex-start;
}

.page-about .value-card__link:hover {
  color: var(--color-on-dark);
  border-bottom-color: var(--color-on-dark);
}

.page-about .about-crosslink {
  max-width: var(--about-max);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 72px) var(--about-gutter) clamp(64px, 8vw, 112px);
  border-top: 1px solid var(--color-line);
  display: grid;
  gap: 24px;
}

.page-about .about-crosslink__title {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-brand);
  margin: 0;
}

.page-about .about-crosslink__links {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}

.page-about .about-crosslink__links a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 4px;
}

.page-about .about-crosslink__links a:hover {
  color: var(--color-brand);
  border-bottom-color: var(--color-accent);
}

.page-about .about-crosslink__note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 0;
  max-width: 52em;
}

@media (min-width: 700px) {
  .page-about .about-hero__layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-about .about-hero__toc {
    position: sticky;
    top: 96px;
    margin-top: 12px;
  }

  .page-about .about-hero__main {
    flex: 1;
  }

  .page-about .about-position__grid {
    grid-template-columns: 1fr 1.1fr;
    align-items: start;
  }

  .page-about .about-position__facts {
    grid-column: 1 / -1;
  }

  .page-about .about-zones__grid {
    gap: 48px;
  }

  .page-about .about-jiangxi__grid {
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
  }

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

@media (min-width: 1024px) {
  .page-about .about-history__grid {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .history-index {
    display: block;
  }

  .page-about .about-zones__grid {
    grid-template-columns: 1.4fr 1fr;
  }

  .page-about .zones-side__note {
    margin-top: 24px;
  }

  .page-about .about-position__facts {
    grid-column: auto;
    grid-row: span 2;
  }
}