.page-about {
  --about-body: #DDE3DC;
  --about-rail: 128px;
  background: var(--mw-bg);
  color: var(--mw-paper);
  overflow-x: hidden;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 34px);
}

/* ---------- 引言 ---------- */
.page-about .about-intro {
  padding: clamp(26px, 5vw, 68px) 0 clamp(22px, 3vw, 38px);
}

.page-about .about-intro__title {
  margin: 14px 0 0;
  font-family: var(--mw-font-cond);
  font-weight: 800;
  font-size: clamp(34px, 7.4vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 15ch;
}

.page-about .about-intro__lead {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-left: clamp(14px, 2vw, 24px);
  border-left: 2px solid var(--mw-lime);
  font-family: var(--mw-font-cond);
  font-size: clamp(17px, 2.05vw, 26px);
  font-weight: 400;
  line-height: 1.5;
  color: var(--mw-paper);
  max-width: 32em;
}

/* ---------- 首图 ---------- */
.page-about .about-hero {
  margin: 0 auto clamp(46px, 7vw, 96px);
}

.page-about .about-hero__frame {
  border: 1px solid var(--mw-line);
  background: var(--mw-slate);
}

.page-about .media-caption {
  margin-top: 10px;
  font-family: var(--mw-font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mw-muted);
}

/* ---------- 规模 ---------- */
.page-about .about-scale__grid {
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .about-scale__text p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-body);
  max-width: 40em;
}

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

.page-about .about-scale__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 16px 18px;
  background: var(--mw-slate);
}

.page-about .about-scale__stat--wide {
  grid-column: 1 / -1;
  background: var(--mw-olive);
}

.page-about .about-scale__stat .stat__value {
  font-family: var(--mw-font-mono);
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--mw-lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-scale__stat--wide .stat__value {
  color: var(--mw-orange);
}

.page-about .about-scale__stat .stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mw-muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-track__head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .timeline {
  display: grid;
  gap: 22px;
}

.page-about .timeline__rail-label {
  margin: 0 0 10px;
  font-family: var(--mw-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mw-muted);
}

.page-about .timeline__years {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .timeline__year {
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--mw-line);
  font-family: var(--mw-font-mono);
  font-size: 14px;
  color: var(--mw-muted);
  text-decoration: none;
  font-variant-numeric: tabular-nums;
  transition: color 180ms var(--mw-ease), border-color 180ms var(--mw-ease);
}

.page-about .timeline__year:hover,
.page-about .timeline__year:focus-visible {
  color: var(--mw-lime);
  border-bottom-color: var(--mw-lime);
}

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

.page-about .timeline__node {
  position: relative;
  padding: 0 0 clamp(24px, 3vw, 38px) clamp(16px, 2vw, 30px);
  border-left: 1px solid var(--mw-line);
  scroll-margin-top: 96px;
}

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

.page-about .timeline__node::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--mw-line);
  transition: background 180ms var(--mw-ease);
}

.page-about .timeline__node:target::before,
.page-about .timeline__node:target .timeline__year-mark {
  background: var(--mw-lime);
  color: var(--mw-lime);
}

.page-about .timeline__node:target {
  border-left-color: var(--mw-lime);
}

.page-about .timeline__year-mark {
  margin: 0;
  display: inline-block;
  padding: 2px 8px;
  background: var(--mw-line);
  font-family: var(--mw-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mw-paper);
}

.page-about .timeline__title {
  margin: 12px 0 0;
  font-family: var(--mw-font-cond);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .timeline__body {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-body);
  max-width: 42em;
}

/* ---------- 数据流程 ---------- */
.page-about .about-flow__head {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-flow__grid {
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--mw-line);
  border: 1px solid var(--mw-line);
}

.page-about .flow__step {
  position: relative;
  padding: 22px 18px 20px;
  background: var(--mw-slate);
  outline: none;
  transition: background 200ms var(--mw-ease);
}

.page-about .flow__step::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--mw-line);
  transition: background 200ms var(--mw-ease);
}

.page-about .flow__step:hover,
.page-about .flow__step:focus {
  background: var(--mw-olive);
}

.page-about .flow__step:hover::after,
.page-about .flow__step:focus::after {
  background: var(--mw-lime);
}

.page-about .flow__step:focus-visible {
  box-shadow: inset 0 0 0 2px var(--mw-lime);
}

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

.page-about .flow__title {
  margin: 8px 0 0;
  font-family: var(--mw-font-cond);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--mw-paper);
}

.page-about .flow__body {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-body);
}

.page-about .flow__detail {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mw-muted);
  border-top: 1px dashed var(--mw-line);
  padding-top: 10px;
}

.page-about .about-flow__figure {
  margin: 0;
}

.page-about .about-flow__figure .media-frame {
  border: 1px solid var(--mw-line);
  background: var(--mw-slate);
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-team__matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--mw-line);
  border: 1px solid var(--mw-line);
}

.page-about .about-team__cell {
  padding: 24px 20px 26px;
  background: var(--mw-bg);
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--mw-font-mono);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
  line-height: 1;
  color: var(--mw-lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__role {
  margin: 12px 0 0;
  font-family: var(--mw-font-cond);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mw-paper);
}

.page-about .about-team__cell p:last-child {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mw-muted);
}

/* ---------- 合作 ---------- */
.page-about .about-partners__grid {
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .about-partners__text p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-body);
  max-width: 40em;
}

.page-about .about-partners__list {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--mw-line);
}

.page-about .about-partners__list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--mw-line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--about-body);
}

.page-about .about-partners__list span {
  font-family: var(--mw-font-mono);
  font-size: 12px;
  color: var(--mw-orange);
  letter-spacing: 0.1em;
}

.page-about .about-partners__figure {
  margin: 0;
}

.page-about .about-partners__frame {
  border: 1px solid var(--mw-line);
  background: var(--mw-slate);
}

.page-about .about-partners__frame img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

/* ---------- 承诺 ---------- */
.page-about .about-promise__list {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-promise__list li {
  position: relative;
  padding: 14px 0 14px 26px;
  border-top: 1px solid var(--mw-line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-body);
}

.page-about .about-promise__list li:last-child {
  border-bottom: 1px solid var(--mw-line);
}

.page-about .about-promise__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 23px;
  width: 14px;
  height: 2px;
  background: var(--mw-lime);
}

.page-about .about-promise__links {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  font-family: var(--mw-font-mono);
  font-size: 12px;
  line-height: 2;
  letter-spacing: 0.04em;
  color: var(--mw-muted);
}

.page-about .about-promise__links a {
  color: var(--mw-paper);
  text-decoration: none;
  border-bottom: 1px solid var(--mw-line);
  transition: color 180ms var(--mw-ease), border-color 180ms var(--mw-ease);
}

.page-about .about-promise__links a:hover,
.page-about .about-promise__links a:focus-visible {
  color: var(--mw-lime);
  border-bottom-color: var(--mw-lime);
}

.page-about .about-promise__links span {
  padding: 0 8px;
  color: var(--mw-line);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .timeline__rail {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .timeline__years {
    flex-direction: column;
    gap: 12px;
    overflow: visible;
  }

  .page-about .timeline__year {
    display: inline-block;
    border-bottom: none;
    border-left: 1px solid var(--mw-line);
    padding: 0 0 0 12px;
    font-size: 15px;
  }

  .page-about .timeline__year:hover,
  .page-about .timeline__year:focus-visible {
    border-left-color: var(--mw-lime);
    border-bottom-color: transparent;
  }
}

@media (min-width: 1024px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team__matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .flow__detail {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    opacity: 0;
    overflow: hidden;
    border-top-color: transparent;
    transition: max-height 280ms var(--mw-ease), opacity 280ms var(--mw-ease),
      margin-top 280ms var(--mw-ease), padding-top 280ms var(--mw-ease);
  }

  .page-about .flow__step:hover .flow__detail,
  .page-about .flow__step:focus .flow__detail {
    max-height: 9em;
    margin-top: 10px;
    padding-top: 10px;
    opacity: 1;
    border-top-color: var(--mw-line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow__step,
  .page-about .flow__detail,
  .page-about .timeline__year,
  .page-about .about-promise__links a {
    transition: none;
  }

  .page-about .flow__detail {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
    padding-top: 10px;
    border-top-color: var(--mw-line);
  }
}
<<<END>>>