.page-about {
  --about-rail-h: 52px;
  background: var(--cream);
}

.page-about .breadcrumb {
  padding-top: 18px;
  padding-bottom: 18px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  background: var(--indigo);
  color: var(--cream);
  overflow: hidden;
  border-top: 1px solid var(--indigo-mid);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-cream) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-cream) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber) 0%, var(--amber) 34%, var(--celadon) 34%, var(--celadon) 62%, var(--indigo-mid) 62%, var(--indigo-mid) 100%);
}

.page-about .about-hero__in {
  position: relative;
  display: grid;
  gap: 36px;
  padding-top: 48px;
  padding-bottom: 52px;
}

.page-about .about-hero__kicker {
  margin: 0 0 18px;
  color: var(--amber-soft);
  letter-spacing: 0.14em;
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  font-size: clamp(32px, 5.2vw, 62px);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .about-hero__text {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(245, 240, 230, 0.84);
}

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

.page-about .about-hero__stats .stat {
  display: block;
  padding: 18px 16px;
  background: var(--indigo);
}

.page-about .about-hero__stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--amber-soft);
  letter-spacing: -0.01em;
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(245, 240, 230, 0.7);
}

/* ---------- 章节导航条 ---------- */

.page-about .about-rail {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-rail__list {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 14px 14px 12px;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-rail__link:hover {
  color: var(--indigo);
  background: var(--cream);
  border-bottom-color: var(--amber);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: -2px;
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 主体两栏 ---------- */

.page-about .about-body {
  display: grid;
  gap: 0;
  padding-top: 40px;
  padding-bottom: 72px;
}

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

.page-about .about-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

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

.page-about .about-index__item a {
  display: block;
  padding: 10px 0 10px 12px;
  border-bottom: 1px solid var(--grid-faint);
  border-left: 2px solid transparent;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-index__item a:hover {
  color: var(--indigo);
  border-left-color: var(--amber);
  background: var(--paper);
}

.page-about .about-index__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-index__note a {
  color: var(--celadon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节 ---------- */

.page-about .about-sec {
  scroll-margin-top: 76px;
  padding-bottom: 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-sec--last {
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 0;
}

.page-about .about-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-top: 16px;
  border-top: 2px solid var(--indigo);
  margin-bottom: 26px;
}

.page-about .about-sec__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-sec__title {
  flex: 1 1 260px;
  margin: 0;
  font-size: clamp(23px, 3.1vw, 38px);
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--indigo);
}

.page-about .about-sec__year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .about-sec__back {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid var(--grid-line);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-sec__back:hover {
  color: var(--indigo);
  border-bottom-color: var(--amber);
}

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

.page-about .about-sec__text.prose {
  max-width: 68ch;
}

.page-about .about-sec__lead {
  margin: 0 0 22px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-sec__foot {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--grid-faint);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-sec__foot a {
  color: var(--celadon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-sec__intro {
  margin: 0 0 24px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .about-sec__banner {
  margin-bottom: 28px;
}

.page-about .about-sec__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 图片容器 ---------- */

.page-about .about-fig {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--indigo-mid);
  aspect-ratio: 3 / 2;
  border: 1px solid var(--grid-line);
}

.page-about .about-fig--wide {
  aspect-ratio: 2 / 1;
}

.page-about .about-fig--square {
  aspect-ratio: 1 / 1;
}

.page-about .about-fig img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.02);
}

.page-about .about-fig__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 7px 12px;
  background: var(--indigo-deep);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

/* ---------- 时间轴 ---------- */

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

.page-about .about-tl .tl__row {
  display: grid;
  gap: 6px;
  padding: 18px 0 18px 18px;
  border-bottom: 1px solid var(--grid-faint);
  border-left: 2px solid var(--grid-line);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-tl .tl__row:hover {
  border-left-color: var(--amber);
  background: var(--paper);
}

.page-about .about-tl .tl__date {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-tl .tl__ver {
  font-size: 15px;
  font-weight: 600;
  color: var(--indigo);
}

.page-about .about-tl .tl__text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 团队卡片 ---------- */

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

.page-about .about-team .card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-team .card__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .about-team .card__title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--indigo);
}

.page-about .about-team .card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 地市矩阵 ---------- */

.page-about .city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .city {
  padding: 14px 14px 16px;
  background: var(--paper);
  border: 1px solid var(--grid-line);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .city:hover,
.page-about .city:focus-within {
  border-color: var(--celadon);
  background: #ffffff;
  transform: translateY(-2px);
}

.page-about .city--featured {
  border-left: 3px solid var(--celadon);
}

.page-about .city__name {
  display: block;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--indigo);
}

.page-about .city__meta {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* ---------- 维护准则列表 ---------- */

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

.page-about .rule-list li {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--grid-faint);
}

.page-about .rule-list__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--celadon);
}

.page-about .rule-list p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .rule-list li {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero__in {
    padding-top: 64px;
    padding-bottom: 68px;
  }

  .page-about .about-sec__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-sec__grid--flip {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
  }

  .page-about .about-fig--square {
    aspect-ratio: 1 / 1;
  }

  .page-about .about-tl .tl__row {
    grid-template-columns: 96px 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
    padding: 20px 0 20px 22px;
  }

  .page-about .about-tl .tl__text {
    margin: 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__in {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
    padding-top: 56px;
    padding-bottom: 96px;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: 88px;
    align-self: start;
  }

  .page-about .about-sec {
    padding-bottom: 72px;
    margin-bottom: 72px;
  }

  .page-about .about-sec__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-sec__grid--flip {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</｜｜DSML｜｜ parameter>