.page-about {
  --about-rail-w: 236px;
  --about-gap: clamp(24px, 4vw, 64px);
  --about-sticky-top: calc(var(--header-h-collapsed) + 20px);
  --about-panel: rgba(18, 48, 38, .55);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(18px, 3vw, 32px) clamp(36px, 6vw, 76px);
  background:
    radial-gradient(120% 84% at 90% -12%, rgba(79, 224, 126, .14), transparent 62%),
    linear-gradient(180deg, var(--stand) 0%, var(--field) 72%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(79, 224, 126, .055) 0 2px, transparent 2px 24px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .about-hero__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--turf);
  box-shadow: 0 0 0 4px rgba(79, 224, 126, .18);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  max-width: 19ch;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(31px, 5.4vw, 62px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--chalk);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--body-text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.page-about .about-figure {
  padding: 14px 16px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--about-panel);
}

.page-about .about-figure__label {
  margin: 0 0 8px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-figure__num {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--turf);
}

.page-about .about-hero__media {
  margin: clamp(24px, 4vw, 46px) 0 0;
  border-radius: var(--radius-card);
  overflow: hidden;
}

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

/* ---------- 分屏骨架 ---------- */
.page-about .about-body {
  padding-block: clamp(36px, 6vw, 88px) clamp(48px, 8vw, 104px);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-rail .rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-about .about-rail .rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 2px 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail .rail__link {
  display: block;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-rail .rail__link:hover,
.page-about .about-rail .rail__link:focus-visible {
  color: var(--chalk);
  border-color: var(--line);
}

.page-about .about-rail .rail__link[aria-current] {
  color: var(--field);
  background: var(--turf);
  border-color: var(--turf);
  font-weight: 600;
}

/* ---------- 内容区块 ---------- */
.page-about .about-block {
  padding-top: clamp(28px, 4.5vw, 48px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h-collapsed) + 26px);
}

.page-about .about-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-block + .about-block {
  margin-top: clamp(44px, 7vw, 96px);
}

.page-about .about-block__index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--turf);
}

.page-about .about-block__title {
  margin: 0 0 16px;
  max-width: 26ch;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--chalk);
}

.page-about .about-block__lede {
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--body-text);
}

/* 服务四块 */
.page-about .about-services {
  gap: 16px;
}

.page-about .about-service {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 22px 22px;
  border-radius: var(--radius-card);
}

.page-about .about-service__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--turf);
}

.page-about .about-service__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.35;
  color: var(--chalk);
}

.page-about .about-service__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--body-text-dim);
}

/* 数据流程 */
.page-about .about-flow__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
}

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

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 0 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__step:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-flow__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: .04em;
  color: var(--turf);
}

.page-about .about-flow__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 19px;
  color: var(--chalk);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--body-text-dim);
}

.page-about .about-flow__media {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
}

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

.page-about .about-flow__media .media__caption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--mist);
}

/* 团队 */
.page-about .about-team {
  gap: 16px;
}

.page-about .about-member {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 22px 22px;
  border-radius: var(--radius-card);
}

.page-about .about-member .card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  justify-content: space-between;
}

.page-about .about-member .card__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 18px;
  color: var(--chalk);
}

.page-about .about-member .card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--body-text-dim);
}

/* 结伴观赛 */
.page-about .about-culture__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}

.page-about .about-culture__text {
  margin: 0 0 20px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .about-checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-checklist li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--body-text-dim);
}

.page-about .about-checklist li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--turf);
}

.page-about .about-culture__media {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--line);
}

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

.page-about .about-culture__media .media__caption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--mist);
}

/* 时间线 */
.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

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

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  position: relative;
  padding: 0 0 clamp(24px, 3.6vw, 38px) clamp(18px, 3vw, 28px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: var(--radius-pill);
  background: var(--turf);
  box-shadow: 0 0 0 4px rgba(79, 224, 126, .16);
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--turf);
}

.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 18px;
  color: var(--chalk);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--body-text-dim);
}

/* 合作与观察 */
.page-about .about-atlas {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: clamp(22px, 3.4vw, 34px);
}

.page-about .about-atlas__cell {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(18, 48, 38, .8), rgba(11, 32, 24, .6));
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

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

.page-about .about-atlas__region {
  font-size: 14px;
  color: var(--body-text);
}

.page-about .about-atlas__count {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  color: var(--chalk);
}

.page-about .about-observe {
  gap: 16px;
}

.page-about .about-observe__card {
  padding: 20px 22px 22px;
  border-radius: var(--radius-card);
}

.page-about .about-observe__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 18px;
  color: var(--chalk);
}

.page-about .about-observe__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--body-text-dim);
}

/* 结尾入口 */
.page-about .about-cta {
  margin-top: clamp(44px, 7vw, 88px);
  padding: clamp(26px, 4vw, 44px) clamp(22px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background:
    linear-gradient(135deg, rgba(79, 224, 126, .12), transparent 58%),
    var(--seat);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.25;
  color: var(--chalk);
}

.page-about .about-cta__text {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--body-text);
}

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

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

@media (min-width: 900px) {
  .page-about .about-flow__layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-about .about-culture__layout {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 0 24px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, .72fr);
    align-items: end;
  }

  .page-about .about-split {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
  }

  .page-about .about-rail {
    position: sticky;
    top: var(--about-sticky-top);
    align-self: start;
  }

  .page-about .about-rail .rail__list {
    flex-direction: column;
    gap: 4px;
    padding: 0;
    overflow: visible;
  }

  .page-about .about-rail .rail__link {
    border-radius: var(--radius-sm);
    padding: 9px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-atlas__cell,
  .page-about .about-rail .rail__link {
    transition: none;
  }

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