.page-about {
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
}

.page-about .ab-body {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 244, 236, .84);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(28px, 5vw, 60px) 0 clamp(48px, 7vw, 88px);
  background:
    radial-gradient(120% 88% at 84% 6%, rgba(212, 175, 55, .10), transparent 58%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 94%);
  border-bottom: 1px solid var(--line-gold);
  overflow: hidden;
}

.page-about .ab-hero__wedge {
  position: absolute;
  top: -14%;
  right: -8%;
  width: min(560px, 62vw);
  height: 126%;
  background: linear-gradient(158deg, rgba(212, 175, 55, .16) 0%, rgba(42, 65, 87, .30) 44%, rgba(6, 15, 24, 0) 74%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  display: grid;
  gap: 36px;
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 46px);
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 14px 0 18px;
  max-width: 16em;
}

.page-about .ab-hero__lede {
  max-width: 34em;
  color: rgba(247, 244, 236, .86);
}

.page-about .ab-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 40px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line-gold);
}

.page-about .ab-fact {
  display: flex;
  align-items: baseline;
  gap: 9px;
}

.page-about .ab-fact__num {
  font-family: var(--font-data);
  font-size: 23px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .ab-fact__unit {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--lead);
}

.page-about .ab-hero__fig {
  margin: 0;
}

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

/* ---------- 章节刻度条 ---------- */
.page-about .ab-timeline {
  position: sticky;
  top: var(--bar-h);
  z-index: 6;
  background: rgba(6, 15, 24, .9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-timeline__inner {
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 var(--gutter);
}

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

.page-about .ab-timeline__list {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 13px 4px;
}

.page-about .ab-timeline__item {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .07em;
  color: var(--steel);
  transition: color .24s var(--ease);
}

.page-about .ab-timeline__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--steel);
  opacity: .55;
  transition: background .24s var(--ease), opacity .24s var(--ease), transform .24s var(--ease);
}

.page-about .ab-timeline__year {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--steel);
}

.page-about .ab-timeline__item[data-active] {
  color: var(--gold-lite);
}

.page-about .ab-timeline__item[data-active] .ab-timeline__dot {
  background: var(--gold);
  opacity: 1;
  transform: scale(1.6);
}

.page-about .ab-timeline__item[data-active] .ab-timeline__year {
  color: var(--gold);
}

/* ---------- 通用章节头 ---------- */
.page-about .ab-section-head {
  max-width: 700px;
  margin-bottom: 38px;
}

.page-about .ab-section-head .cc-h2 {
  margin: 10px 0 0;
}

.page-about .ab-section-head__lede {
  margin-top: 16px;
  color: var(--lead);
}

/* ---------- 起点 ---------- */
.page-about .ab-origin__grid {
  display: grid;
  gap: 36px;
}

.page-about .ab-origin__copy .cc-h2 {
  margin: 10px 0 22px;
}

.page-about .ab-metric-card {
  padding: 26px 24px 22px;
}

.page-about .ab-metrics {
  margin: 14px 0 0;
  display: grid;
}

.page-about .ab-metrics > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .ab-metrics > div:last-child {
  border-bottom: 0;
}

.page-about .ab-metrics dt {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--lead);
}

.page-about .ab-metrics dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 15px;
  letter-spacing: .03em;
  color: var(--gold);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .ab-ring {
  position: relative;
  width: 216px;
  height: 216px;
  margin: 0 auto;
  border-radius: 50%;
  background: conic-gradient(
    var(--gold) 0 39.29%,
    var(--teal) 39.29% 64.29%,
    var(--steel) 64.29% 85.71%,
    var(--heat) 85.71% 100%
  );
  box-shadow: 0 0 0 1px var(--line-gold), 0 24px 52px -28px rgba(0, 0, 0, .92);
}

.page-about .ab-ring::before {
  content: "";
  position: absolute;
  inset: 26px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
}

.page-about .ab-ring__core {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  z-index: 1;
  font-family: var(--font-data);
}

.page-about .ab-ring__core b {
  display: block;
  font-size: 40px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .02em;
  line-height: 1;
}

.page-about .ab-ring__core small {
  display: block;
  margin-top: 6px;
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--lead);
  letter-spacing: .14em;
}

.page-about .ab-team__cap {
  margin: 20px 0 0;
  text-align: center;
  font-family: var(--font-ui);
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .ab-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-team__item {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  align-items: start;
  gap: 16px;
  padding: 20px 22px;
}

.page-about .ab-team__item .cc-h3 {
  margin: 0 0 8px;
}

.page-about .ab-team__item .ab-body {
  margin: 0;
  font-size: 15px;
}

.page-about .ab-team__swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-top: 8px;
}

.page-about .ab-team__swatch--data { background: var(--gold); }
.page-about .ab-team__swatch--viz { background: var(--teal); }
.page-about .ab-team__swatch--edit { background: var(--steel); }
.page-about .ab-team__swatch--care { background: var(--heat); }

.page-about .ab-team__n {
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .03em;
  line-height: 1;
  padding-top: 4px;
}

/* ---------- 校验 ---------- */
.page-about .ab-check__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ab-check__step {
  padding: 28px 24px 24px;
  background: linear-gradient(180deg, rgba(42, 65, 87, .5), rgba(11, 27, 43, .92));
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold);
}

.page-about .ab-check__step .cc-h3 {
  margin: 0 0 12px;
}

.page-about .ab-check__step .ab-body {
  margin: 0;
  font-size: 15px;
}

.page-about .ab-check__no {
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .ab-check__note {
  margin: 26px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--line-gold);
  font-size: 15px;
  color: var(--lead);
}

/* ---------- 城市坐标 ---------- */
.page-about .ab-map {
  background: linear-gradient(180deg, rgba(6, 15, 24, .6), rgba(11, 27, 43, 1));
}

.page-about .ab-map__grid {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-about .ab-map__copy .cc-h2 {
  margin: 10px 0 22px;
}

.page-about .ab-map__fig {
  margin: 0;
}

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

.page-about .ab-cities {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 8px;
  margin-top: 26px;
}

.page-about .ab-city {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: rgba(42, 65, 87, .34);
  font-family: var(--font-ui);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--white);
}

.page-about .ab-city::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  flex: none;
}

/* ---------- 演进 ---------- */
.page-about .ab-roadmap__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-roadmap__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 24px 0 24px 24px;
  border-left: 1px solid var(--line);
}

.page-about .ab-roadmap__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 34px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .ab-roadmap__item:first-child {
  padding-top: 6px;
}

.page-about .ab-roadmap__item:first-child::before {
  top: 16px;
}

.page-about .ab-roadmap__year {
  font-family: var(--font-data);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-about .ab-roadmap__body .cc-h3 {
  margin: 0 0 10px;
}

.page-about .ab-roadmap__body .ab-body {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
}

.page-about .ab-roadmap__fig {
  margin: 36px 0 0;
}

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

/* ---------- 引用（象牙白长文区） ---------- */
.page-about .ab-paper {
  background: var(--ivory);
  color: var(--paper-ink);
}

.page-about .ab-paper .cc-h2,
.page-about .ab-paper .cc-h3 {
  color: var(--paper-ink);
}

.page-about .ab-paper .cc-kicker {
  color: var(--gold-ink);
}

.page-about .ab-paper .ab-body {
  color: #33404E;
}

.page-about .ab-paper .ab-section-head__lede {
  color: #4A5A6B;
}

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

.page-about .ab-rule__card {
  padding: 24px 24px 20px;
  background: rgba(255, 255, 255, .58);
  border: 1px solid rgba(138, 109, 31, .24);
  border-left: 3px solid var(--gold-ink);
}

.page-about .ab-rule__card .cc-h3 {
  margin: 0 0 10px;
}

.page-about .ab-rule__card .ab-body {
  margin: 0;
  font-size: 15px;
}

/* ---------- 联系 ---------- */
.page-about .ab-contact {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
  border-top: 1px solid var(--line-gold);
}

.page-about .ab-contact__grid {
  display: grid;
  gap: 36px;
  align-items: start;
}

.page-about .ab-contact__copy .cc-h2 {
  margin: 10px 0 22px;
}

.page-about .ab-contact__cta {
  margin-top: 10px;
}

.page-about .ab-contact__card {
  padding: 30px 26px;
  background: rgba(42, 65, 87, .42);
  border: 1px solid var(--line-gold);
  backdrop-filter: blur(6px);
}

.page-about .ab-contact__card .cc-card__title {
  margin: 0 0 6px;
}

.page-about .ab-channels {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-channel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 16px;
  padding: 15px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .ab-channel--wide {
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-channel:last-child {
  border-bottom: 0;
}

.page-about .ab-channel__label {
  grid-column: 1 / -1;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lead);
}

.page-about .ab-channel__value {
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--gold-lite);
  word-break: break-word;
}

.page-about .ab-channel__copy {
  flex: none;
}

.page-about .ab-contact__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--lead);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 60px;
  }

  .page-about .ab-team__grid {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 70px;
  }

  .page-about .ab-check__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .ab-roadmap__item {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 34px;
    padding-left: 40px;
  }

  .page-about .ab-rule {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 980px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .ab-map__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
    gap: 64px;
    align-items: center;
  }

  .page-about .ab-contact__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    gap: 64px;
  }

  .page-about .ab-roadmap__fig {
    margin-top: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-timeline__dot,
  .page-about .ab-timeline__item {
    transition: none;
  }
}
</final_output>