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

/* ---------- 首屏 ---------- */
.page-about .mission-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--cool);
  overflow: hidden;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px;
}

.page-about .mission-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 20px;
}

.page-about .mission-hero h1 {
  margin: 12px 0 18px;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.01em;
  max-width: 16em;
}

.page-about .mission-hero .lede {
  max-width: 40em;
  color: var(--ink-soft);
}

.page-about .mission-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .mission-hero__panel {
  position: relative;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px 22px 26px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-about .mission-hero__panel::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 4px;
  background: var(--orange);
}

.page-about .mission-hero__panel-tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange-soft);
}

.page-about .hero-facts {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 16px;
}

.page-about .hero-facts__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cool);
}

.page-about .hero-facts__value {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 27px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--white);
}

/* ---------- 通用区块头 ---------- */
.page-about .block-head {
  display: grid;
  gap: 10px;
  margin-bottom: 30px;
}

.page-about .block-head__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .block-head h2 {
  margin: 0;
  font-size: clamp(25px, 4vw, 38px);
  line-height: 1.2;
  font-weight: 800;
}

.page-about .block-head p {
  margin: 0;
  max-width: 54em;
  color: var(--ink-soft);
  line-height: 1.8;
}

/* ---------- 发展历程 ---------- */
.page-about .journey {
  display: grid;
  gap: 26px;
}

.page-about .ruler {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .ruler__link {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 2px;
  padding: 7px 13px;
  border: 1px solid var(--cool);
  border-radius: var(--radius-pill);
  background: var(--white);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .ruler__link:hover,
.page-about .ruler__link:focus-visible {
  border-color: var(--navy);
  background: var(--orange-soft);
}

.page-about .ruler__year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
}

.page-about .ruler__label {
  font-size: 11px;
  color: var(--ink-soft);
}

.page-about .flow {
  position: relative;
  display: grid;
  gap: 34px;
  padding-left: 24px;
  border-left: 1px solid var(--cool);
}

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

.page-about .flow__node::before {
  content: "";
  position: absolute;
  top: 14px;
  left: -32px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--navy);
  box-sizing: content-box;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .flow__node--current::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .flow__node:target::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .flow__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--navy);
  transition: color 0.18s var(--ease);
}

.page-about .flow__node:target .flow__year {
  color: var(--orange);
}

.page-about .flow__title {
  margin: 8px 0 8px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .flow__text {
  margin: 0;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .flow__media {
  margin: 4px 0;
}

/* ---------- 服务版图 ---------- */
.page-about .map-grid {
  display: grid;
  gap: 30px;
}

.page-about .dotmap {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--cool);
  border-radius: var(--radius);
}

.page-about .dotmap__cell {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--cool);
  border-radius: 2px;
  background: transparent;
}

.page-about .dotmap__cell--a {
  background: var(--navy);
  border-color: var(--navy);
}

.page-about .dotmap__cell--b {
  background: var(--teal);
  border-color: var(--teal);
}

.page-about .dotmap__cell--c {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
}

.page-about .legend {
  list-style: none;
  margin: 14px 0 24px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .legend li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.page-about .legend__swatch {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  border: 1px solid var(--cool);
}

.page-about .legend__swatch--a {
  background: var(--navy);
  border-color: var(--navy);
}

.page-about .legend__swatch--b {
  background: var(--teal);
  border-color: var(--teal);
}

.page-about .legend__swatch--c {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
}

.page-about .stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--cool);
  border: 1px solid var(--cool);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .stat-list__item {
  background: var(--white);
  padding: 15px 16px;
}

.page-about .stat-list__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--navy);
}

.page-about .stat-list__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .map-grid__right p {
  margin: 0 0 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .map-grid__right .media {
  margin-top: 22px;
}

/* ---------- 场馆准入 ---------- */
.page-about .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .step {
  position: relative;
  background: var(--white);
  border: 1px solid var(--cool);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .step:hover {
  transform: translateY(-2px);
  border-color: var(--navy);
}

.page-about .step__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .step__title {
  margin: 8px 0 8px;
  font-size: 19px;
  font-weight: 700;
}

.page-about .step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .admission-note {
  margin: 22px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--orange);
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 62em;
}

.page-about #admission .media {
  margin-top: 26px;
}

/* ---------- 改版记录带 ---------- */
.page-about .revision-band {
  padding: clamp(40px, 6vw, 76px) 0;
  background-color: var(--navy);
  color: var(--white);
  background-image:
    linear-gradient(var(--grid-line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-light) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px;
}

.page-about .revision-band .block-head__no {
  color: var(--orange-soft);
}

.page-about .revision-band .block-head h2 {
  color: var(--white);
}

.page-about .revision-band .block-head p {
  color: var(--cool);
}

.page-about .revision {
  display: grid;
  gap: 16px;
}

.page-about .rev-card {
  background: var(--cream);
  color: var(--ink);
  padding: 24px 22px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .rev-card--accent {
  background: var(--orange);
}

.page-about .rev-card__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--navy);
  opacity: 0.75;
}

.page-about .rev-card__title {
  margin: 8px 0 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .rev-card__details {
  margin-top: 14px;
}

.page-about .rev-card__summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--navy);
  border-bottom: 1px solid currentColor;
  display: inline-block;
  padding-bottom: 2px;
}

.page-about .rev-card__summary::-webkit-details-marker {
  display: none;
}

.page-about .rev-card__summary::after {
  content: " +";
}

.page-about .rev-card__details[open] .rev-card__summary::after {
  content: " −";
}

.page-about .rev-card__body {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 20px;
}

.page-about .team-card {
  border-top: 2px solid var(--navy);
  padding-top: 16px;
}

.page-about .team-card__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .team-card__title {
  margin: 8px 0 10px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
}

.page-about .team-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  margin-top: clamp(36px, 5vw, 56px);
  padding: 26px 22px;
  background: var(--white);
  border: 1px solid var(--cool);
  border-radius: var(--radius-lg);
  display: grid;
  gap: 20px;
}

.page-about .about-cta__text {
  margin: 0;
  line-height: 1.8;
  color: var(--ink);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .revision {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 34px 36px;
  }
}

@media (min-width: 900px) {
  .page-about .mission-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: 48px;
  }

  .page-about .mission-hero__panel {
    padding: 28px 26px 30px;
  }

  .page-about .journey {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .ruler {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .ruler__link {
    flex-direction: row;
    align-items: baseline;
    gap: 10px;
    padding: 10px 0 10px 18px;
    border: 0;
    border-left: 1px solid var(--cool);
    border-radius: 0;
    background: transparent;
    position: relative;
  }

  .page-about .ruler__link::before {
    content: "";
    position: absolute;
    left: -3px;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--cool);
    transition: background-color 0.18s var(--ease);
  }

  .page-about .ruler__link:hover,
  .page-about .ruler__link:focus-visible {
    background: transparent;
    border-left-color: var(--orange);
    color: var(--navy);
  }

  .page-about .ruler__link:hover::before,
  .page-about .ruler__link:focus-visible::before {
    background: var(--orange);
  }

  .page-about .flow {
    padding-left: 34px;
    gap: 44px;
  }

  .page-about .flow__node::before {
    left: -42px;
    top: 16px;
  }

  .page-about .map-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .step:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -19px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--orange);
    font-size: 16px;
    line-height: 1;
  }
}

@media (min-width: 1080px) {
  .page-about .journey {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .flow__title {
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ruler__link,
  .page-about .step,
  .page-about .flow__node::before,
  .page-about .flow__year {
    transition: none;
  }

  .page-about .step:hover {
    transform: none;
  }
}
<<<END>>>