.page-about {
  --about-h1: clamp(2rem, 6.4vw, 3.4rem);
  --about-h2: clamp(1.55rem, 3.8vw, 2.4rem);
  --about-pad: 56px;
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 20px 0 0;
  font-size: 13px;
  color: rgba(244, 241, 234, 0.6);
}

.page-about .about-crumbs li + li::before {
  content: "·";
  margin-right: 6px;
  color: var(--coral);
}

.page-about .about-crumbs a {
  color: var(--gold-soft);
  text-decoration: none;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  text-decoration: underline;
}

/* ---------- 页首 ---------- */
.page-about .about-hero {
  background: var(--ink);
  color: var(--cream);
  padding-bottom: 40px;
}

.page-about .about-hero__inner {
  display: grid;
  gap: var(--gap-lg);
  padding-top: 22px;
}

.page-about .about-hero__stage {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-dark);
  background: var(--ink-2);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.94;
}

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

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
}

.page-about .about-hero h1 {
  margin: 0 0 14px;
  font-size: var(--about-h1);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--cream);
}

.page-about .about-hero__lead {
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.82);
  max-width: 46ch;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 0;
  border-top: 1px solid var(--line-gold);
  font-size: 13px;
  line-height: 1.5;
  color: rgba(244, 241, 234, 0.72);
}

.page-about .about-hero__facts strong {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  line-height: 1;
}

/* ---------- 通用区段 ---------- */
.page-about .about-origin,
.page-about .about-timeline,
.page-about .about-team,
.page-about .about-standard,
.page-about .about-partners {
  padding-block: var(--about-pad);
}

.page-about .section-title {
  margin: 0 0 14px;
  font-size: var(--about-h2);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 800;
}

.page-about .section-lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  max-width: 54ch;
}

.page-about .about-timeline .section-title,
.page-about .about-timeline .section-lead {
  color: var(--cream);
}

.page-about .about-timeline .section-lead {
  color: rgba(244, 241, 234, 0.66);
}

/* ---------- 为什么这样建 ---------- */
.page-about .about-origin {
  background: var(--cream);
  color: var(--graphite);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-origin__copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
}

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

.page-about .about-origin__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  border-radius: var(--radius);
  background: var(--ink);
  border: 1px solid var(--line-dark);
  box-shadow: var(--shadow-1);
}

.page-about .stat__value {
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--gold);
}

.page-about .stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 241, 234, 0.72);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  background: var(--ink);
  color: var(--cream);
}

.page-about .about-timeline__head {
  margin-bottom: 32px;
}

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

.page-about .tl__item {
  position: relative;
  padding-left: 34px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 26px;
  bottom: 0;
  width: 1px;
  background: rgba(244, 241, 234, 0.16);
}

.page-about .tl__item:last-child::before {
  bottom: 32px;
}

.page-about .tl__dot {
  position: absolute;
  left: 0;
  top: 14px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  border: 1px solid var(--line-gold);
  background: var(--ink);
  display: grid;
  place-items: center;
}

.page-about .tl__dot::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .tl__details {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 6px 8px 6px 0;
  margin-bottom: 4px;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .tl__details[open] {
  background: var(--ink-2);
  border-color: var(--line-gold);
  padding: 12px 16px 14px;
  margin-bottom: 12px;
}

.page-about .tl__details summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cream);
}

.page-about .tl__details summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__details summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-num);
  font-size: 18px;
  color: var(--gold);
}

.page-about .tl__details[open] summary::after {
  content: "–";
}

.page-about .tl__version {
  flex: none;
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .tl__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.76);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--cream);
  color: var(--graphite);
}

.page-about .about-team__head {
  margin-bottom: 28px;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .team-card {
  position: relative;
  padding: 22px 20px;
  border-radius: var(--radius);
  background: var(--ink);
  border: 1px solid var(--line-dark);
  box-shadow: var(--shadow-1);
  color: var(--cream);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--line-gold);
  outline: none;
}

.page-about .team-card:focus-visible {
  box-shadow: 0 0 0 2px var(--gold);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-num);
  font-size: 44px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-about .team-card .card__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .team-card .card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.74);
}

.page-about .team-card .card__hint {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(232, 182, 90, 0.32);
  font-size: 12px;
  line-height: 1.6;
  color: var(--celadon);
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 200ms var(--ease), max-height 200ms var(--ease);
}

.page-about .team-card:hover .card__hint,
.page-about .team-card:focus-visible .card__hint {
  opacity: 1;
  max-height: 80px;
}

.page-about .about-team__note {
  margin: 26px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 14px;
  line-height: 1.9;
  color: #3c4450;
}

.page-about .about-team__note a {
  color: #1b4a6e;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 整编流程 ---------- */
.page-about .about-standard {
  background: var(--ink-2);
  color: var(--cream);
}

.page-about .about-standard__head {
  margin-bottom: 26px;
}

.page-about .about-standard .section-title {
  color: var(--cream);
}

.page-about .about-standard__figure {
  margin: 0 0 28px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-gold);
  background: var(--ink);
}

.page-about .about-standard__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-about .about-standard__caption {
  padding: 10px 16px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(244, 241, 234, 0.6);
  border-top: 1px solid var(--line-dark);
}

.page-about .std-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .std-step {
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--line-dark);
  background: rgba(14, 27, 46, 0.6);
}

.page-about .std-step__dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--celadon);
  margin-bottom: 10px;
  box-shadow: 0 0 0 4px rgba(79, 169, 139, 0.18);
}

.page-about .std-step__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--cream);
}

.page-about .std-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.72);
}

/* ---------- 共创伙伴 ---------- */
.page-about .about-partners {
  background: var(--cream);
  color: var(--graphite);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-partners__copy p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-partners__copy a {
  color: #1b4a6e;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-partners__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .btn--gold {
  background: var(--gold);
  color: var(--ink);
}

.page-about .btn--gold:hover,
.page-about .btn--gold:focus-visible {
  background: var(--gold-soft);
  transform: translateY(-2px);
}

.page-about .btn--ghost {
  border-color: var(--ink);
  color: var(--ink);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  border-color: var(--coral);
  color: var(--coral);
  transform: translateY(-2px);
}

.page-about .about-partners__figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink);
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 服务地区与联系 ---------- */
.page-about .about-contact {
  background: var(--cream);
  padding-block: 0 48px;
}

.page-about .about-contact__inner {
  display: grid;
  gap: 22px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
  position: relative;
}

.page-about .about-contact__inner::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 52px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-contact__title {
  margin: 0;
  font-size: clamp(1.3rem, 2.8vw, 1.7rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--graphite);
}

.page-about .about-contact__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
}

.page-about .about-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact__row dt {
  flex: none;
  min-width: 76px;
  font-size: 13px;
  color: #5b6472;
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--graphite);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .std-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-contact__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-pad: 88px;
  }

  .page-about .about-hero {
    padding-bottom: 56px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1fr;
    align-items: end;
    padding-top: 28px;
  }

  .page-about .about-hero__stage {
    grid-area: 1 / 1;
  }

  .page-about .about-hero__stage::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(14, 27, 46, 0.18) 34%, rgba(14, 27, 46, 0.94) 100%);
  }

  .page-about .about-hero__img {
    aspect-ratio: 16 / 7;
  }

  .page-about .about-hero__panel {
    grid-area: 1 / 1;
    justify-self: end;
    align-self: end;
    width: min(560px, 56%);
    padding: 0 28px 34px 0;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 64px;
    align-items: start;
  }

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

  .page-about .about-timeline__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    gap: 40px;
    align-items: end;
    margin-bottom: 44px;
  }

  .page-about .about-timeline__head .eyebrow {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  .page-about .tl {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
    row-gap: 4px;
  }

  .page-about .tl__item:nth-child(odd)::before {
    bottom: -4px;
  }

  .page-about .tl__item:nth-child(even)::before {
    display: none;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .team-card--edit {
    grid-column: span 5;
  }

  .page-about .team-card--build {
    grid-column: span 4;
  }

  .page-about .team-card--care {
    grid-column: span 3;
  }

  .page-about .about-standard__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: end;
    gap: 40px;
  }

  .page-about .about-standard__head .eyebrow {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

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

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-contact__inner {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 48px;
    align-items: start;
    padding-top: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .btn,
  .page-about .tl__details,
  .page-about .team-card .card__hint {
    transition: none;
  }

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