.page-about {
  --about-soft: rgba(244, 247, 251, 0.78);
  --about-hair: rgba(30, 58, 95, 0.9);
  background: var(--c-ink);
  color: var(--c-white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--sp-5) var(--sp-6);
  background:
    radial-gradient(100% 80% at 82% -12%, rgba(255, 107, 74, 0.18), transparent 62%),
    radial-gradient(70% 60% at 0% 100%, rgba(47, 191, 113, 0.1), transparent 72%),
    var(--c-ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(30, 58, 95, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 95, 0.55) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .crumbs {
  margin-bottom: var(--sp-4);
}

.page-about .about-hero h1 {
  margin: 0 0 var(--sp-3);
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.2vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: var(--sp-5) 0 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--sp-2) var(--sp-3);
  background: var(--c-ink);
}

.page-about .about-facts__num {
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1;
  color: var(--c-coral);
}

.page-about .about-facts__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--c-muted);
}

.page-about .about-hero__figure {
  position: relative;
  margin: var(--sp-5) 0 0;
  border: 1px solid var(--c-line);
  box-shadow: var(--glow-line);
}

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

/* ---------- 横向年份轴 ---------- */
.page-about .about-timeline {
  background: var(--c-ink-soft);
  border-block: 1px solid var(--c-line);
}

.page-about .timeline {
  display: flex;
  gap: 0;
  margin: 0;
  padding: var(--sp-3) var(--shell-pad) var(--sp-5);
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--c-coral) rgba(30, 58, 95, 0.6);
}

.page-about .timeline::-webkit-scrollbar {
  height: 4px;
}

.page-about .timeline::-webkit-scrollbar-thumb {
  background: var(--c-coral);
}

.page-about .timeline::-webkit-scrollbar-track {
  background: rgba(30, 58, 95, 0.6);
}

.page-about .timeline__item {
  position: relative;
  flex: 0 0 clamp(232px, 74vw, 296px);
  padding: var(--sp-3) var(--sp-3) 0 0;
  border-top: 1px solid var(--c-line);
  scroll-snap-align: start;
}

.page-about .timeline__dot {
  position: absolute;
  top: -6px;
  left: 0;
  width: 11px;
  height: 11px;
  background: var(--c-coral);
  box-shadow: 0 0 12px rgba(255, 107, 74, 0.55);
}

.page-about .timeline__num {
  display: block;
  margin-bottom: var(--sp-2);
  font-size: clamp(24px, 5vw, 30px);
  line-height: 1;
  color: var(--c-coral);
}

.page-about .timeline__title {
  margin: 0 0 var(--sp-1);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}

/* ---------- 覆盖网络 ---------- */
.page-about .network-grid {
  display: grid;
  gap: var(--sp-5);
}

.page-about .network-map {
  padding: var(--sp-3);
  border: 1px solid var(--c-line);
  background:
    radial-gradient(90% 70% at 30% 10%, rgba(30, 58, 95, 0.85), transparent 70%),
    var(--c-ink);
}

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

.page-about .net-lines line {
  stroke: var(--c-line);
  stroke-width: 1;
}

.page-about .net-city {
  fill: none;
  stroke: var(--c-green);
  stroke-width: 1.6;
}

.page-about .net-point {
  fill: var(--c-coral);
}

.page-about .net-label {
  fill: #c8d6e8;
  font-family: var(--font-body);
  font-size: 18px;
}

.page-about .network-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
  margin: var(--sp-3) 0 0;
  padding: var(--sp-2) 0 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-about .network-legend li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--c-muted);
}

.page-about .legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
}

.page-about .legend-dot--city {
  border: 1.5px solid var(--c-green);
  border-radius: 50%;
}

.page-about .legend-dot--point {
  background: var(--c-coral);
}

.page-about .network-side {
  padding: var(--sp-3);
  border: 1px solid var(--c-line);
  background: var(--c-ink-soft);
}

.page-about .network-side .media-frame {
  margin-bottom: var(--sp-3);
}

.page-about .network-side__title {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.35;
}

.page-about .network-side p {
  margin: 0 0 var(--sp-2);
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .network-side .btn {
  margin-top: var(--sp-1);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  border-top: 1px solid var(--c-line);
}

.page-about .team-layout {
  display: grid;
  gap: var(--sp-4);
}

.page-about .team-photo {
  margin: 0;
  border: 1px solid var(--c-line);
}

.page-about .team-roles {
  display: grid;
  gap: var(--sp-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-role {
  position: relative;
  padding: var(--sp-3);
  border: 1px solid var(--c-line);
  background: var(--c-ink-soft);
}

.page-about .team-role__no {
  display: block;
  margin-bottom: var(--sp-1);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--c-coral);
}

.page-about .team-role__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
}

.page-about .team-role p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .team-note {
  margin: var(--sp-4) 0 0;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--c-line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 合作生态横带 ---------- */
.page-about .about-partners {
  background:
    linear-gradient(100deg, rgba(255, 107, 74, 0.16), transparent 58%),
    var(--c-ink-soft);
  border-block: 1px solid var(--c-line);
}

.page-about .partners-inner {
  display: grid;
  gap: var(--sp-4);
}

.page-about .partners-copy h2 {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.015em;
}

.page-about .partners-copy p {
  max-width: 34em;
  margin: 0 0 var(--sp-3);
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .partners-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .partners-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--sp-2) var(--sp-3);
  background: var(--c-ink);
}

.page-about .partners-stats__num {
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1;
  color: var(--c-yellow);
}

.page-about .partners-stats__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-muted);
}

/* ---------- 四条做法 ---------- */
.page-about .about-principles {
  background: var(--c-mist);
  color: var(--c-graphite);
}

.page-about .about-principles .section-title {
  color: var(--c-graphite);
}

.page-about .about-principles .eyebrow {
  color: var(--c-coral-ink);
}

.page-about .principles {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(16, 20, 24, 0.16);
}

.page-about .principles li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--sp-2);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid rgba(16, 20, 24, 0.16);
}

.page-about .principles__num {
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-coral-ink);
}

.page-about .principles h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--c-graphite);
}

.page-about .principles p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(16, 20, 24, 0.78);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  background:
    radial-gradient(80% 90% at 88% 0%, rgba(255, 107, 74, 0.18), transparent 62%),
    var(--c-ink);
}

.page-about .about-next__inner {
  padding: var(--sp-4) var(--sp-3);
  border: 1px solid var(--c-coral);
  box-shadow: var(--glow-coral);
}

.page-about .about-next h2 {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.page-about .about-next p {
  max-width: 34em;
  margin: 0 0 var(--sp-3);
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-block: var(--sp-6) var(--sp-7);
  }

  .page-about .about-facts {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: var(--sp-6);
  }

  .page-about .about-hero__figure {
    margin-top: var(--sp-6);
  }

  .page-about .network-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: var(--sp-6);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: var(--sp-5);
  }

  .page-about .team-roles {
    gap: var(--sp-3);
  }

  .page-about .team-role:nth-child(2),
  .page-about .team-role:nth-child(4) {
    margin-top: var(--sp-4);
  }

  .page-about .partners-inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: var(--sp-6);
  }

  .page-about .principles li {
    grid-template-columns: 64px minmax(0, 1fr);
    padding: var(--sp-4) 0;
  }

  .page-about .about-next__inner {
    padding: var(--sp-6);
  }
}

@media (min-width: 1200px) {
  .page-about .timeline {
    padding-inline: max(var(--shell-pad), calc((100vw - var(--shell-max)) / 2 + var(--shell-pad)));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline {
    scroll-behavior: auto;
  }
}
<<<END>>>