.page-about {
  --about-soft: rgba(43, 143, 232, .14);
  --about-fade: rgba(201, 214, 208, .55);
  color: var(--ink);
  background: var(--mist);
}

.page-about .breadcrumb {
  padding: 22px 0 6px;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 18px 0 66px;
  background-image:
    linear-gradient(180deg, rgba(230, 242, 253, .8) 0%, rgba(247, 250, 248, 0) 76%),
    linear-gradient(rgba(201, 214, 208, .38) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 214, 208, .38) 1px, transparent 1px);
  background-size: 100% 100%, 72px 72px, 72px 72px;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 163, 107, .16), rgba(43, 143, 232, .08) 55%, transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__mark {
  color: var(--ink-50);
}

.page-about .about-hero__body h1 {
  margin: 0 0 18px;
  max-width: 18ch;
}

.page-about .about-hero__body .lede {
  max-width: 60ch;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  border-top: 1px solid var(--about-fade);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-hero__stats .stat-num {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--wing-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stats .stat-label {
  font-size: 13px;
  color: var(--ink-70);
}

/* ---------- 通用章节 ---------- */
.page-about section {
  scroll-margin-top: 96px;
}

.page-about .section-head {
  align-items: baseline;
}

.page-about .section-head--tight {
  margin-bottom: 14px;
}

.page-about .about-lede {
  max-width: 62ch;
  margin: 0 0 34px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-70);
}

.page-about .tl-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 143, 232, .35);
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .tl-link:hover,
.page-about .tl-link:focus-visible {
  color: var(--wing-deep);
  border-color: var(--wing);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  padding: 70px 0 24px;
  background: var(--mist);
}

.page-about .tl-wrap {
  position: relative;
  padding: 10px 0 6px;
}

.page-about .tl-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
  pointer-events: none;
  border-radius: var(--radius);
}

.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 56px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 12px;
  bottom: 44px;
  width: 1px;
  background: linear-gradient(180deg, var(--wing) 0%, var(--sky) 42%, rgba(201, 214, 208, .2) 100%);
}

.page-about .tl-node {
  position: relative;
  padding-bottom: 44px;
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -45px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--wing);
  box-shadow: 0 0 0 4px rgba(15, 163, 107, .12);
  transition: border-color .25s ease, box-shadow .25s ease;
}

.page-about .tl-node:hover::before {
  border-color: var(--flare);
  box-shadow: 0 0 0 5px rgba(255, 90, 43, .14);
}

.page-about .tl-stamp {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .tl-year {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--wing-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-ver {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-50);
}

.page-about .tl-card {
  padding: 24px 22px 22px;
  background: var(--paper);
  position: relative;
}

.page-about .tl-card > .tag {
  margin-bottom: 12px;
}

.page-about .tl-card h3 {
  margin: 0 0 12px;
  font-size: 21px;
  line-height: 1.35;
  letter-spacing: -.01em;
}

.page-about .tl-card p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-70);
  max-width: 54ch;
}

.page-about .tl-card p:last-child {
  margin-bottom: 0;
}

.page-about .tl-card__link {
  padding-top: 6px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 76px 0 66px;
  background:
    linear-gradient(180deg, rgba(230, 242, 253, .6), rgba(247, 250, 248, 0) 62%),
    var(--mist);
}

.page-about .about-team__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-bottom: 34px;
}

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

.page-about .about-team__intro p {
  margin: 0 0 14px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-70);
  max-width: 52ch;
}

.page-about .team-rail {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 6px 2px 20px;
  scrollbar-width: thin;
}

.page-about .team-rail::-webkit-scrollbar {
  height: 6px;
}

.page-about .team-rail::-webkit-scrollbar-thumb {
  background: var(--about-fade);
  border-radius: 3px;
}

.page-about .team-card {
  flex: 0 0 84%;
  scroll-snap-align: start;
  padding: 22px 20px 20px;
  border-left: 3px solid var(--wing);
  background: var(--paper);
  transition: transform .22s ease, border-color .22s ease;
}

.page-about .team-card:nth-child(1) { border-left-color: var(--wing); }
.page-about .team-card:nth-child(2) { border-left-color: var(--sky); }
.page-about .team-card:nth-child(3) { border-left-color: var(--gold); }
.page-about .team-card:nth-child(4) { border-left-color: var(--flare); }

.page-about .team-card:hover,
.page-about .team-card:focus-visible {
  transform: translateY(-3px);
}

.page-about .team-card__no {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-50);
}

.page-about .team-card h3 {
  margin: 0 0 10px;
  font-size: 19px;
  letter-spacing: -.01em;
}

.page-about .team-card p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-70);
}

.page-about .team-card__note {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--about-fade);
  font-size: 14px;
  color: var(--wing-deep);
  font-weight: 600;
}

/* ---------- 运营地区 ---------- */
.page-about .about-region {
  padding: 70px 0 60px;
  background: var(--paper);
  border-top: 1px solid var(--about-fade);
  border-bottom: 1px solid var(--about-fade);
}

.page-about .about-region__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-region__body p {
  margin: 0 0 16px;
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--ink-70);
  max-width: 56ch;
}

.page-about .region-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-fade);
}

.page-about .region-list li {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--about-fade);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ink-70);
}

.page-about .region-list__key {
  color: var(--wing-deep);
  font-weight: 700;
  letter-spacing: .08em;
}

.page-about .about-region__media {
  margin: 0;
  align-self: start;
}

/* ---------- 合作 ---------- */
.page-about .about-partner {
  padding: 76px 0 70px;
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .partner-block {
  padding: 26px 24px 22px;
  background: var(--paper);
}

.page-about .partner-block > .tag {
  margin-bottom: 14px;
}

.page-about .partner-block h3 {
  margin: 0 0 12px;
  font-size: 21px;
  line-height: 1.35;
  letter-spacing: -.01em;
}

.page-about .partner-block p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-70);
  max-width: 46ch;
}

.page-about .partner-block p:last-child {
  margin-bottom: 0;
}

/* ---------- 体量与原则 ---------- */
.page-about .about-scale {
  padding: 74px 0 78px;
  background: linear-gradient(160deg, rgba(15, 163, 107, .07), rgba(43, 143, 232, .09) 62%, rgba(247, 250, 248, 0) 100%);
}

.page-about .scale-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .scale-figures {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-about .scale-figure {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding-bottom: 4px;
}

.page-about .scale-figure__num {
  font-family: var(--mono);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.page-about .scale-figure__label {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-70);
  max-width: 34ch;
}

.page-about .scale-bar {
  position: relative;
  display: block;
  height: 4px;
  margin-top: 6px;
  border-radius: 2px;
  background: rgba(201, 214, 208, .5);
  overflow: hidden;
}

.page-about .scale-bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--fill, 60%);
  border-radius: 2px;
  background: var(--grad-action);
}

.page-about .scale-principles h3 {
  margin: 0 0 16px;
  font-size: 20px;
  letter-spacing: -.01em;
}

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

.page-about .principle-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--about-fade);
}

.page-about .principle-list li:first-child {
  border-top: 1px solid var(--about-fade);
}

.page-about .principle-list__no {
  color: var(--sky);
  padding-top: 3px;
}

.page-about .principle-list p {
  margin: 0;
  font-size: 16px;
  line-height: 1.76;
  color: var(--ink-70);
}

.page-about .principle-list strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  padding: 60px 0 84px;
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 34px 24px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-paper);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-70);
  max-width: 42ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 中屏 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding: 34px 0 84px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .about-hero__body h1 {
    max-width: 22ch;
  }

  .page-about .about-team__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .team-card {
    flex: 0 0 calc((100% - 20px) / 2);
  }

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

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, auto);
    align-items: center;
    padding: 40px 36px;
  }
}

/* ---------- 桌面：时间轴双列与吸边年份 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 200px minmax(0, 1fr);
  }

  .page-about .tl {
    padding-left: 0;
  }

  .page-about .tl::before {
    left: 99px;
    top: 16px;
    bottom: 52px;
  }

  .page-about .tl-node {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    column-gap: 28px;
    padding-bottom: 56px;
  }

  .page-about .tl-node::before {
    left: 93px;
    top: 8px;
  }

  .page-about .tl-stamp {
    position: sticky;
    top: 108px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 0;
    padding-top: 2px;
  }

  .page-about .tl-card {
    padding: 28px 30px 26px;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .scale-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 48px;
  }

  .page-about .team-card {
    flex: 0 0 calc((100% - 48px) / 3.4);
  }
}

@media (min-width: 1120px) {
  .page-about .about-tl {
    padding-top: 84px;
  }

  .page-about .about-team,
  .page-about .about-partner,
  .page-about .about-scale {
    padding-top: 92px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .tl-node::before,
  .page-about .tl-link {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-visible {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --fill: currentColor;
}