.page-about {
  --about-accent-deep: #B23A1B;
  --about-grid-size: 72px;
  display: block;
}

.page-about .breadcrumb {
  margin-top: 22px;
  margin-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 60px) 0 clamp(44px, 7vw, 92px);
  background:
    radial-gradient(circle at 84% 10%, rgba(53, 224, 200, .16), transparent 54%),
    radial-gradient(circle at 4% 88%, rgba(255, 107, 74, .13), transparent 48%),
    var(--deep);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(34, 58, 92, .52) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 58, 92, .52) 1px, transparent 1px);
  background-size: var(--about-grid-size) var(--about-grid-size);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 86%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 86%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 52px);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.6vw, 64px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: #FFFFFF;
  max-width: 16em;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 46em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--text);
  opacity: .92;
}

.page-about .about-hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__panel {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 41, 74, .95), rgba(10, 24, 48, .7));
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 14px;
  height: 14px;
  background: var(--cyan);
}

.page-about .about-hero__panel-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--slate);
  text-transform: uppercase;
}

.page-about .about-snapshot {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-snapshot__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-soft);
}

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

.page-about .about-snapshot__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .about-snapshot__txt {
  font-size: 14px;
  color: var(--slate);
}

/* ---------- 为什么这样做 ---------- */
.page-about .about-why {
  background: var(--deep);
  border-bottom: 1px solid var(--line);
}

.page-about .about-why__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-why__body p {
  margin-top: 0;
  margin-bottom: 18px;
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  background:
    linear-gradient(to bottom, rgba(18, 41, 74, .55), rgba(10, 24, 48, 0) 62%),
    var(--deep);
  border-bottom: 1px solid var(--line);
}

.page-about .timeline {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 0 16px;
  padding-bottom: 34px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 1.9em;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--line), transparent);
}

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

.page-about .timeline__item:last-child::before {
  display: none;
}

.page-about .timeline__marker {
  position: relative;
  padding-left: 20px;
  font-size: 13px;
  letter-spacing: .1em;
  line-height: 1.9;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .timeline__marker::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 8px;
  background: var(--cyan);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.4;
  letter-spacing: -.01em;
  color: #FFFFFF;
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text);
  opacity: .84;
}

.page-about .about-timeline__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--deep);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 46px);
}

.page-about .about-team__copy p {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text);
  opacity: .86;
}

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

.page-about .roster__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .roster__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--coral);
}

.page-about .roster__txt {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text);
  opacity: .86;
}

.page-about .about-team__note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-dim);
  font-size: 14px;
  line-height: 1.76;
  color: var(--slate);
}

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

/* ---------- 覆盖数据 ---------- */
.page-about .about-reach {
  background: var(--deep);
  border-bottom: 1px solid var(--line);
}

.page-about .reach-band {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-about .reach-band__item {
  padding: 22px 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 41, 74, .68), rgba(10, 24, 48, .16));
}

.page-about .reach-band__num {
  display: block;
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .reach-band__label {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-reach__figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

/* ---------- 合作与资质（浅色区） ---------- */
.page-about .about-ecosystem {
  background: var(--cream);
  color: var(--ink);
}

.page-about .about-ecosystem .section-title {
  color: var(--ink);
}

.page-about .about-ecosystem .eyebrow {
  color: var(--about-accent-deep);
}

.page-about .about-ecosystem .section-note {
  color: rgba(28, 21, 17, .72);
}

.page-about .eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(28, 21, 17, .18);
  border: 1px solid rgba(28, 21, 17, .18);
}

.page-about .eco-card {
  padding: 26px 22px 28px;
  background: var(--cream);
}

.page-about .eco-card__num {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--about-accent-deep);
}

.page-about .eco-card__title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .eco-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(28, 21, 17, .8);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  background:
    linear-gradient(120deg, rgba(18, 41, 74, .98), rgba(10, 24, 48, .98)),
    var(--deep-2);
  border-bottom: 1px solid var(--line);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: clamp(36px, 6vw, 68px) 0;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: #FFFFFF;
}

.page-about .about-cta__copy p {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text);
  opacity: .86;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .reach-band__item {
    padding: 24px 20px;
  }

  .page-about .eco-card {
    padding: 30px 26px 32px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(268px, .78fr);
    align-items: end;
  }

  .page-about .about-why__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 56px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }

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

  .page-about .eco-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 44px;
  }

  .page-about .about-cta__actions {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1000px) {
  .page-about .timeline__item {
    grid-template-columns: minmax(140px, 200px) minmax(0, 1fr);
    gap: 0 40px;
    padding-bottom: 42px;
  }

  .page-about .timeline__marker {
    font-size: 14px;
    letter-spacing: .14em;
  }
}

@media (max-width: 420px) {
  .page-about .timeline__item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .page-about .timeline__item::before {
    display: none;
  }

  .page-about .roster__item {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}
<<<END>>>