.page-about {
  background: var(--paper);
  color: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper);
  padding: clamp(34px, 6vw, 66px) 0 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(760px 420px at 88% 2%, rgba(201, 162, 39, 0.20), transparent 62%),
    radial-gradient(560px 360px at 2% 98%, rgba(111, 158, 142, 0.16), transparent 66%),
    linear-gradient(180deg, rgba(22, 40, 61, 0.9) 0%, rgba(14, 27, 42, 0) 58%);
  pointer-events: none;
}

.page-about .about-hero__shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3.4vw, 34px);
}

.page-about .about-hero__eyebrow {
  color: var(--gold-soft);
  letter-spacing: 0.14em;
}

.page-about .about-hero__title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(30px, 6.2vw, 64px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  margin: 0.36em 0 0.5em;
  max-width: 20ch;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold-soft);
  background-image: linear-gradient(180deg, transparent 68%, rgba(201, 162, 39, 0.34) 68%);
  background-repeat: no-repeat;
}

.page-about .about-hero__lead {
  max-width: 62ch;
  color: rgba(245, 241, 232, 0.78);
}

.page-about .about-hero__foot {
  position: relative;
  z-index: 1;
  margin-top: clamp(34px, 5.4vw, 62px);
}

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

.page-about .about-chapters li {
  background: rgba(22, 40, 61, 0.86);
}

.page-about .about-chapters a {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 15px 16px 17px;
  color: var(--paper);
  text-decoration: none;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-chapters a:hover,
.page-about .about-chapters a:focus-visible {
  background: rgba(201, 162, 39, 0.14);
}

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

.page-about .about-chapters__label {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
}

/* ---------- 通用小件 ---------- */
.page-about .about-eyebrow {
  color: var(--gold-soft);
  letter-spacing: 0.14em;
}

.page-about .about-eyebrow--ink {
  color: var(--gold-deep);
}

.page-about .about-intro {
  max-width: 68ch;
  margin-top: 0.9em;
  color: var(--rock);
}

.page-about .about-row .prose,
.page-about .about-certification .prose {
  color: var(--rock);
}

.page-about .about-prose--dark {
  color: rgba(245, 241, 232, 0.76);
}

.page-about .about-rule {
  margin: clamp(30px, 4vw, 48px) 0 clamp(18px, 2.4vw, 26px);
}

/* ---------- 历程 ---------- */
.page-about .about-tl-layout {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .about-side {
  border-bottom: 1px solid var(--hair-dark);
  padding-bottom: 14px;
}

.page-about .about-side .side-index__title {
  color: var(--gold-soft);
  margin-bottom: 10px;
}

.page-about .about-years {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-years__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid var(--hair-dark);
  border-radius: 999px;
  color: rgba(245, 241, 232, 0.8);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  border-color: var(--gold);
  color: var(--gold-soft);
}

.page-about .about-years__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .about-years__txt {
  font-size: 12px;
  color: var(--rock);
}

.page-about .about-figure {
  margin: clamp(24px, 3.6vw, 38px) 0 clamp(30px, 4.4vw, 46px);
}

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

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.6vw, 38px) clamp(22px, 3vw, 30px);
  border-left: 1px solid var(--hair-dark);
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.15);
}

.page-about .tl__card {
  background: rgba(22, 40, 61, 0.72);
  border: 1px solid var(--hair-dark);
  border-radius: var(--radius);
  padding: clamp(16px, 2.4vw, 24px);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .tl__card:hover {
  border-color: rgba(201, 162, 39, 0.5);
  transform: translateY(-2px);
}

.page-about .tl__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 8px;
}

.page-about .tl__year-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--gold-soft);
  letter-spacing: 0.06em;
}

.page-about .tl__year-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

.page-about .tl__card .h3 {
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .tl__card p {
  margin: 0;
  color: rgba(245, 241, 232, 0.74);
  line-height: 1.85;
}

/* ---------- 覆盖与规模 ---------- */
.page-about .about-coverage {
  background: var(--paper);
}

.page-about .about-row {
  display: grid;
  gap: clamp(22px, 3.4vw, 38px);
  align-items: center;
}

.page-about .about-row + .about-row,
.page-about .about-row + .about-stats,
.page-about .about-row + .about-crews {
  margin-top: clamp(30px, 4.6vw, 52px);
}

.page-about .about-row__btn {
  margin-top: 1.4em;
}

.page-about .about-row .h2 {
  margin-bottom: 0.5em;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(30px, 4.6vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(12px, 1.8vw, 18px);
}

.page-about .about-stat {
  position: relative;
  background: var(--paper-warm);
  border: 1px solid var(--hair-light);
  border-radius: var(--radius);
  padding: clamp(16px, 2.2vw, 22px);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-stat::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--gold);
}

.page-about .about-stat--slate::after { background: var(--slate); }
.page-about .about-stat--celadon::after { background: var(--celadon); }
.page-about .about-stat--terracotta::after { background: var(--terracotta); }
.page-about .about-stat--plum::after { background: var(--plum); }

.page-about .about-stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px -18px rgba(14, 27, 42, 0.4);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 42px);
  font-weight: 600;
  line-height: 1;
  color: var(--ink-900);
  margin: 0;
}

.page-about .about-stat__unit {
  font-size: 0.52em;
  margin-left: 3px;
  color: var(--gold-deep);
}

.page-about .about-stat__label {
  margin: 10px 0 4px;
  font-weight: 700;
  color: var(--ink-800);
}

.page-about .about-stat__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--rock);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink-900);
}

.page-about .about-crews,
.page-about .about-certs,
.page-about .about-network__grid,
.page-about .about-network__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-crews {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  margin-top: clamp(26px, 3.6vw, 40px);
}

.page-about .about-crew {
  position: relative;
  background: rgba(22, 40, 61, 0.66);
  border: 1px solid var(--hair-dark);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 26px);
  border-top: 3px solid var(--gold);
}

.page-about .about-crew--celadon { border-top-color: var(--celadon); }
.page-about .about-crew--terracotta { border-top-color: var(--terracotta); }
.page-about .about-crew--slate { border-top-color: var(--slate); }

.page-about .about-crew__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-soft);
  margin: 0 0 10px;
}

.page-about .about-crew .h3 {
  color: var(--paper);
  margin: 0 0 10px;
}

.page-about .about-crew p:last-child {
  margin: 0;
  color: rgba(245, 241, 232, 0.74);
  line-height: 1.85;
}

/* ---------- 资质 ---------- */
.page-about .about-certification {
  background: var(--paper);
}

.page-about .about-certs {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  margin-top: clamp(26px, 3.6vw, 40px);
}

.page-about .about-cert {
  background: #fff;
  border: 1px solid var(--hair-light);
  border-radius: var(--radius);
  padding: clamp(20px, 2.6vw, 30px);
  box-shadow: 0 18px 36px -30px rgba(14, 27, 42, 0.5);
}

.page-about .about-cert__mark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-900);
  background: linear-gradient(120deg, var(--gold-soft), rgba(231, 200, 115, 0.35));
  border-radius: 999px;
  padding: 5px 14px;
  margin: 0 0 14px;
}

.page-about .about-cert .h3 {
  margin: 0 0 10px;
}

.page-about .about-cert p:last-child {
  margin: 0;
  color: var(--rock);
  line-height: 1.85;
}

.page-about .about-certified-note {
  margin: 0;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--rock);
}

.page-about .about-certified-note a {
  color: var(--gold-deep);
  text-underline-offset: 3px;
}

/* ---------- 合作网络 ---------- */
.page-about .about-network {
  background: var(--paper-deep);
}

.page-about .about-network__head {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
}

.page-about .about-network__head .h2 {
  margin: 0.3em 0 0;
}

.page-about .about-network__grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .about-network__item {
  background: rgba(245, 241, 232, 0.72);
  border: 1px solid rgba(14, 27, 42, 0.1);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .about-network__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 600;
  line-height: 1;
  color: var(--moss);
  margin: 0 0 12px;
}

.page-about .about-network__item .h3 {
  margin: 0 0 8px;
}

.page-about .about-network__item p:last-child {
  margin: 0;
  color: var(--rock);
  line-height: 1.85;
}

.page-about .about-network__links {
  display: grid;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-linkcard {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 18px;
  border: 1px solid rgba(14, 27, 42, 0.16);
  border-radius: var(--radius-sm);
  background: rgba(245, 241, 232, 0.55);
  color: var(--ink-900);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-linkcard:hover,
.page-about .about-linkcard:focus-visible {
  border-color: var(--gold);
  background: var(--paper);
  transform: translateX(3px);
}

.page-about .about-linkcard__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-deep);
}

.page-about .about-linkcard__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  background: var(--ink-800);
}

.page-about .about-cta__shell {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: center;
}

.page-about .about-cta__text .h2 {
  color: var(--paper);
  margin: 0 0 0.5em;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-chapters {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 860px) {
  .page-about .about-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(30px, 4.4vw, 60px);
  }

  .page-about .about-row--flip .about-row__figure {
    order: -1;
  }

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

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

  .page-about .about-network__head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }

  .page-about .about-cta__shell {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 980px) {
  .page-about .about-tl-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-side {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    border-bottom: none;
    border-right: 1px solid var(--hair-dark);
    padding: 0 18px 0 0;
  }

  .page-about .about-years {
    flex-direction: column;
    overflow: visible;
    padding: 0;
    gap: 6px;
  }

  .page-about .about-years__link {
    width: 100%;
    justify-content: flex-start;
    border-color: transparent;
    border-radius: var(--radius-sm);
    padding: 8px 10px;
  }

  .page-about .about-years__link:hover,
  .page-about .about-years__link:focus-visible {
    border-color: rgba(201, 162, 39, 0.4);
    background: rgba(201, 162, 39, 0.08);
  }

  .page-about .tl__item {
    padding-left: 40px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__card,
  .page-about .about-stat,
  .page-about .about-linkcard,
  .page-about .about-chapters a {
    transition: none;
  }

  .page-about .tl__card:hover,
  .page-about .about-stat:hover,
  .page-about .about-linkcard:hover {
    transform: none;
  }
}
<<<END>>>