.page-about {
  --about-pad: clamp(52px, 7.5vw, 96px);
  --about-radius: 28px;
  --about-line: rgba(20, 22, 26, .1);
  --about-line-dark: rgba(143, 207, 196, .28);
  --about-mid-oasis: #12596a;
  background: var(--sand);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(20px, 3vw, 36px);
  margin-bottom: clamp(22px, 3.4vw, 40px);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .08em;
  color: var(--mist);
}
.page-about .about-crumb__link {
  color: var(--oasis);
  text-decoration: none;
}
.page-about .about-crumb__link:hover,
.page-about .about-crumb__link:focus-visible {
  text-decoration: underline;
}
.page-about .about-crumb__here {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(44px, 6.5vw, 84px);
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
}
.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .16em;
  color: var(--gold-deep);
}
.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-64);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--ink);
}
.page-about .about-hero__extra {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  font-family: var(--font-data);
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--oasis-deep);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  box-shadow: 0 24px 48px -34px rgba(11, 59, 69, .6);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 发展阶段 ---------- */
.page-about .about-growth__head {
  margin-bottom: clamp(26px, 3.6vw, 46px);
}
.page-about .about-growth__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 54px);
}
.page-about .about-stages {
  position: relative;
  padding-left: 30px;
}
.page-about .about-stages::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--mint) 52%, var(--oasis) 100%);
}
.page-about .about-stage {
  position: relative;
  z-index: 1;
  background: var(--warm-white);
  border: 1px solid var(--about-line);
  border-radius: 18px;
  overflow: hidden;
}
.page-about .about-stage + .about-stage {
  margin-top: 16px;
}
.page-about .about-stage__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-stage__head::-webkit-details-marker {
  display: none;
}
.page-about .about-stage__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: var(--step-16);
  color: var(--oasis);
}
.page-about .about-stage[open] .about-stage__head::after {
  content: "\2212";
}
.page-about .about-stage__head:focus-visible {
  outline: 2px solid var(--oasis);
  outline-offset: -2px;
}
.page-about .about-stage__num {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--oasis);
  color: var(--warm-white);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .04em;
}
.page-about .about-stage:nth-child(2) .about-stage__num {
  background: var(--about-mid-oasis);
}
.page-about .about-stage:nth-child(3) .about-stage__num {
  background: var(--oasis-deep);
}
.page-about .about-stage__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-18);
  color: var(--ink);
}
.page-about .about-stage__facts {
  margin: 0;
  padding: 2px 16px 16px;
  list-style: none;
  display: grid;
  gap: 8px;
}
.page-about .about-stage__facts li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--about-line);
  font-size: var(--step-14);
  color: var(--mist);
}
.page-about .about-stage__facts b {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: var(--step-16);
  color: var(--ink);
  letter-spacing: .02em;
}

.page-about .about-phase::before {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  border-radius: 2px;
  background: var(--gold);
  margin-bottom: 16px;
}
.page-about .about-phase + .about-phase {
  margin-top: clamp(30px, 4vw, 50px);
}
.page-about .about-phase__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-32);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-about .about-phase p {
  margin: 0 0 14px;
  font-size: var(--step-16);
  line-height: 1.78;
  color: var(--ink);
}
.page-about .about-phase p:last-child {
  margin-bottom: 0;
}
.page-about .about-backtop {
  margin: clamp(28px, 3.6vw, 44px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--about-line);
}
.page-about .about-backtop a {
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .1em;
  color: var(--oasis);
  text-decoration: none;
}
.page-about .about-backtop a:hover,
.page-about .about-backtop a:focus-visible {
  color: var(--gold-deep);
  text-decoration: underline;
}

/* ---------- 服务网络 ---------- */
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}
.page-about .about-network__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-44);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--ink);
}
.page-about .about-network__copy p {
  margin: 0 0 14px;
  font-size: var(--step-16);
  line-height: 1.78;
}
.page-about .about-network__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 24px 0 0;
}
.page-about .about-network__stat {
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--warm-white);
  border: 1px solid var(--about-line);
}
.page-about .about-network__stat dt {
  margin-bottom: 6px;
  font-size: var(--step-12);
  letter-spacing: .08em;
  color: var(--mist);
}
.page-about .about-network__stat dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: var(--step-22);
  letter-spacing: .02em;
  color: var(--oasis-deep);
}
.page-about .about-network__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
}
.page-about .about-network__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-network__cap {
  margin: 12px 0 0;
  font-size: var(--step-12);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 内容口径 ---------- */
.page-about .about-rules__head {
  margin-bottom: clamp(26px, 3.6vw, 44px);
}
.page-about .about-rules__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
.page-about .about-rule {
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: 22px;
  background: var(--warm-white);
  border: 1px solid var(--about-line);
  transition: transform .32s var(--ease), box-shadow .32s var(--ease), border-color .32s var(--ease);
}
.page-about .about-rule:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: 0 22px 44px -32px rgba(11, 59, 69, .55);
}
.page-about .about-rule--sand {
  background: var(--sand-soft);
}
.page-about .about-rule__idx {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .12em;
  color: var(--gold-deep);
}
.page-about .about-rule h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-22);
  line-height: 1.3;
  color: var(--ink);
}
.page-about .about-rule p:not(.about-rule__idx) {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 团队角色带 ---------- */
.page-about .about-team__head {
  margin-bottom: clamp(26px, 3.6vw, 44px);
}
.page-about .about-team__rail {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.page-about .about-team__figure {
  margin: 0;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--about-line-dark);
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-team__card {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 251, 244, .07);
  border: 1px solid var(--about-line-dark);
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.page-about .about-team__card:hover {
  background: rgba(255, 251, 244, .13);
  border-color: var(--mint);
}
.page-about .about-team__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-22);
  color: var(--warm-white);
}
.page-about .about-team__kw {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--mint);
}
.page-about .about-team__desc {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.72;
  color: rgba(255, 251, 244, .8);
}

@media (hover: hover) and (pointer: fine) {
  .page-about .about-team__desc {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .34s var(--ease), opacity .34s var(--ease);
  }
  .page-about .about-team__card:hover .about-team__desc,
  .page-about .about-team__card:focus-within .about-team__desc {
    max-height: 16em;
    opacity: 1;
  }
}

/* ---------- 视觉叙事 ---------- */
.page-about .about-look__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 44px);
}
.page-about .about-look__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-44);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--ink);
}
.page-about .about-look__copy p {
  margin: 0 0 14px;
  font-size: var(--step-16);
  line-height: 1.78;
}
.page-about .about-look__panel {
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: 24px;
  background: var(--sand-soft);
  border: 1px solid var(--about-line);
}
.page-about .about-swatches {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-swatch {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--about-line);
  font-size: var(--step-14);
  color: var(--ink);
}
.page-about .about-swatch:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .about-swatch span {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 9px;
}
.page-about .about-swatch--gold span {
  background: var(--gold);
}
.page-about .about-swatch--oasis span {
  background: var(--oasis);
}
.page-about .about-swatch--ochre span {
  background: var(--ochre);
}
.page-about .about-swatch--lapis span {
  background: var(--lapis);
}
.page-about .about-look__note {
  margin: 18px 0 0;
  font-size: var(--step-12);
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 尾部索引 ---------- */
.page-about .about-next {
  padding-bottom: clamp(56px, 7vw, 96px);
}
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-next__item {
  display: block;
  padding: 20px 22px;
  border-radius: 20px;
  background: var(--warm-white);
  border: 1px solid var(--about-line);
  text-decoration: none;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.page-about .about-next__item:hover,
.page-about .about-next__item:focus-visible {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: 0 22px 42px -34px rgba(11, 59, 69, .6);
}
.page-about .about-next__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .14em;
  color: var(--gold-deep);
}
.page-about .about-next__ttl {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-22);
  line-height: 1.3;
  color: var(--ink);
}
.page-about .about-next__note {
  display: block;
  font-size: var(--step-14);
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-network__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(34px, 4.5vw, 60px);
  }
  .page-about .about-growth__grid {
    grid-template-columns: minmax(240px, .62fr) minmax(0, 1.38fr);
    align-items: start;
  }
  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    align-items: center;
  }
  .page-about .about-look__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-rules__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-about .about-rule:nth-child(1) {
    grid-column: span 5;
  }
  .page-about .about-rule:nth-child(2) {
    grid-column: span 7;
  }
  .page-about .about-rule:nth-child(3) {
    grid-column: span 7;
  }
  .page-about .about-rule:nth-child(4) {
    grid-column: span 5;
  }
}

@media (min-width: 1000px) {
  .page-about .about-team__rail {
    flex-direction: row;
    align-items: stretch;
    gap: 22px;
  }
  .page-about .about-team__figure {
    flex: 0 0 208px;
  }
  .page-about .about-team__list {
    flex: 1 1 auto;
    display: flex;
    gap: 14px;
  }
  .page-about .about-team__card {
    flex: 1 1 0;
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rule,
  .page-about .about-next__item,
  .page-about .about-team__card,
  .page-about .about-team__desc {
    transition: none;
  }
  .page-about .about-rule:hover,
  .page-about .about-next__item:hover,
  .page-about .about-next__item:focus-visible {
    transform: none;
  }
}
<<<END>>>