.page-about {
  --ab-ink-soft: rgba(245, 241, 232, .78);
  --ab-ink-faint: rgba(245, 241, 232, .6);
  --ab-line: rgba(143, 199, 223, .2);
  --ab-rail: 132px;
  --ab-panel: rgba(18, 52, 77, .5);
  background: var(--sea-900);
  color: var(--paper);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .breadcrumbs {
  padding-top: clamp(16px, 3vw, 28px);
  font-size: 12px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding-top: clamp(20px, 3vw, 36px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 100%;
  background:
    radial-gradient(90% 70% at 88% 0%, rgba(18, 52, 77, .95), transparent 62%),
    linear-gradient(200deg, rgba(255, 107, 44, .08), transparent 45%);
  pointer-events: none;
  z-index: 0;
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  align-items: end;
}

.page-about .ab-hero__kicker {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ice-300);
  margin: 0 0 16px;
}

.page-about .ab-hero__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(36px, 7vw, 76px);
  line-height: 1.06;
  letter-spacing: -.02em;
  margin: 0 0 20px;
  max-width: 14em;
}

.page-about .ab-hero__lede {
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.8;
  color: var(--ab-ink-soft);
  max-width: 34em;
  margin: 0 0 14px;
}

.page-about .ab-hero__sub {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-ink-faint);
  max-width: 36em;
  margin: 0;
}

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

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

.page-about .ab-stat {
  background: rgba(11, 17, 25, .82);
  padding: 16px 14px 14px;
}

.page-about .ab-stat__num {
  display: block;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1;
  color: var(--orange-500);
  letter-spacing: -.02em;
}

.page-about .ab-stat__cap {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ab-ink-faint);
}

/* ---------- 图片 ---------- */
.page-about .ab-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border: 1px solid var(--rule);
  background: var(--night-900);
  overflow: hidden;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-figure--split {
  max-width: 640px;
  margin-top: 30px;
}

.page-about .ab-figure figcaption {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ab-ink-faint);
  border-top: 1px solid var(--rule-soft);
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-section {
  border-top: 1px solid var(--rule-soft);
  padding-block: clamp(40px, 6vw, 84px);
}

.page-about .ab-chapter {
  display: grid;
  gap: 20px;
}

.page-about .ab-rail {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.page-about .chapter__num {
  font-family: var(--font-mono);
  font-size: clamp(44px, 5vw, 72px);
  line-height: .9;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(143, 199, 223, .5);
}

.page-about .chapter__label {
  display: inline-block;
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange-200);
  border: 1px solid rgba(255, 107, 44, .42);
  background: rgba(255, 107, 44, .08);
  padding: 4px 9px;
  border-radius: 2px;
}

.page-about .chapter__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.28;
  letter-spacing: -.01em;
  margin: 0 0 14px;
  max-width: 20em;
}

.page-about .ab-prose p {
  margin: 0 0 1em;
  max-width: 38em;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

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

.page-about .ab-prose strong {
  color: var(--paper);
  font-weight: 600;
}

.page-about .ab-prose a,
.page-about .ab-partner-cta a,
.page-about .ab-eco-item__text a {
  color: var(--orange-200);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .ab-statement {
  margin: 26px 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--orange-500);
  background: linear-gradient(100deg, rgba(18, 52, 77, .88), rgba(11, 17, 25, .35));
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 23px);
  line-height: 1.7;
  color: var(--paper);
}

/* ---------- 城市网络 ---------- */
.page-about .ab-network {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.page-about .ab-map {
  border: 1px solid var(--rule);
  background: radial-gradient(120% 100% at 18% 8%, rgba(18, 52, 77, .92), rgba(7, 24, 39, .96));
  padding: 10px 10px 6px;
}

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

.page-about .ab-map__dot circle {
  fill: var(--ice-300);
  fill-opacity: .65;
}

.page-about .ab-map__west circle {
  fill: var(--flag-yellow);
  fill-opacity: .9;
}

.page-about .ab-map__label text {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--ice-300);
}

.page-about .ab-map__caption {
  margin: 4px 4px 6px;
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--ice-300);
}

.page-about .ab-city-groups {
  display: grid;
  gap: 20px;
}

.page-about .ab-city-group__head {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ice-300);
}

.page-about .ab-city-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-city-chip {
  font-size: 12px;
  padding: 6px 10px;
  border: 1px solid var(--rule);
  background: rgba(18, 52, 77, .45);
  color: var(--paper);
  border-radius: 2px;
}

.page-about .ab-city-chip--west {
  border-color: rgba(255, 194, 158, .5);
  color: var(--orange-200);
  background: rgba(255, 107, 44, .08);
}

.page-about .ab-city-note {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ab-ink-faint);
  border-left: 2px solid var(--flag-green);
  padding-left: 12px;
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .ab-team-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .ab-team-card {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--ab-panel);
  border: 1px solid var(--rule);
  box-shadow: 6px 6px 0 rgba(18, 52, 77, .32);
}

.page-about .ab-team-card__tag {
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--orange-200);
}

.page-about .ab-team-card h3 {
  margin: 8px 0 8px;
  font-size: 17.5px;
  font-weight: 700;
}

.page-about .ab-team-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

.page-about .ab-team-media {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-about .ab-team-media .ab-figure {
  margin: 0;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .ab-flow li {
  position: relative;
  padding: 10px 14px;
  border: 1px solid var(--rule);
  border-left: 2px solid var(--orange-500);
  background: rgba(11, 17, 25, .6);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--paper);
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline__hint {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ice-300);
}

.page-about .ab-timeline {
  list-style: none;
  display: flex;
  gap: 0;
  margin: 0;
  padding: 18px 0 14px;
  border-top: 1px solid var(--rule);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-node {
  position: relative;
  flex: 0 0 auto;
  width: min(78vw, 268px);
  padding: 18px 22px 4px 0;
  scroll-snap-align: start;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  top: -23px;
  left: 0;
  width: 9px;
  height: 9px;
  border: 1px solid var(--ice-300);
  border-radius: 50%;
  background: var(--sea-900);
}

.page-about .ab-node--current::before {
  background: var(--orange-500);
  border-color: var(--orange-500);
}

.page-about .ab-node__year {
  display: block;
  font-size: 20px;
  letter-spacing: .02em;
  color: var(--orange-200);
}

.page-about .ab-node__title {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .ab-node__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ab-ink-soft);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco {
  margin-top: 24px;
  border-top: 1px solid var(--rule-soft);
}

.page-about .ab-eco-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px dashed rgba(143, 199, 223, .24);
}

.page-about .ab-eco-item__idx {
  font-size: 13px;
  color: var(--flag-yellow);
  letter-spacing: .08em;
  padding-top: 2px;
}

.page-about .ab-eco-item__title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
}

.page-about .ab-eco-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ab-ink-soft);
  max-width: 42em;
}

.page-about .ab-partner-cta {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ab-ink-faint);
  max-width: 40em;
}

/* ---------- 服务机制 ---------- */
.page-about .ab-service {
  display: grid;
  gap: 18px;
  margin-top: 24px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--rule);
  background: linear-gradient(160deg, rgba(18, 52, 77, .62), rgba(11, 17, 25, .88));
}

.page-about .ab-service__item {
  display: grid;
  gap: 6px;
}

.page-about .ab-service__key {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ice-300);
}

.page-about .ab-service__val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ab-ink-soft);
}

/* ---------- 结尾色带 ---------- */
.page-about .ab-band {
  margin-top: clamp(36px, 6vw, 72px);
  background: linear-gradient(115deg, rgba(255, 107, 44, .16), rgba(110, 148, 167, .14) 48%, rgba(109, 146, 123, .13));
  border-top: 1px solid rgba(255, 107, 44, .35);
}

.page-about .ab-flagline {
  height: 3px;
  background: var(--flagline);
  opacity: .55;
}

.page-about .ab-band__inner {
  padding-block: clamp(32px, 5vw, 58px);
}

.page-about .ab-band__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.25;
  margin: 0 0 14px;
}

.page-about .ab-band__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .ab-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .ab-team-card:nth-child(even) {
    margin-top: 22px;
  }

  .page-about .ab-flow {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 22px;
  }

  .page-about .ab-flow li {
    border-left: 1px solid var(--rule);
    border-top: 2px solid var(--orange-500);
  }

  .page-about .ab-flow li + li::before {
    content: "→";
    position: absolute;
    left: -18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--orange-500);
    font-size: 13px;
  }

  .page-about .ab-service {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 32px;
  }
}

@media (min-width: 820px) {
  .page-about .ab-chapter {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .ab-rail {
    position: sticky;
    top: 104px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
  }

  .page-about .ab-hero__stats {
    margin-bottom: 6px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-network {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .ab-team-media {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: end;
    gap: 24px;
  }

  .page-about .ab-team-media .ab-flow {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding-bottom: 6px;
  }

  .page-about .ab-team-media .ab-flow li + li::before {
    content: "↓";
    position: absolute;
    left: 18px;
    top: -14px;
    transform: none;
    font-size: 12px;
  }

  .page-about .ab-node {
    width: 272px;
    padding-right: 30px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-eco-item {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .ab-hero__stats {
    align-self: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-node,
  .page-about .ab-team-card,
  .page-about .ab-figure {
    transform: none !important;
  }
}
<<<PAGE_CSS_END>>>