.page-about {
  --about-gutter: 20px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-about .wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--about-gutter);
}

.page-about .section {
  padding: 60px 0;
}

/* ============ 首屏框景 ============ */
.page-about .about-hero {
  padding: calc(var(--header-h) + 22px) var(--about-gutter) 0;
}

.page-about .about-hero__frame {
  position: relative;
  max-width: 1360px;
  margin: 0 auto;
  min-height: 500px;
  display: flex;
  align-items: flex-end;
  border-radius: var(--radius-xl);
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(158deg, rgba(31, 42, 58, 0.94) 0%, rgba(31, 42, 58, 0.76) 48%, rgba(47, 125, 115, 0.46) 100%);
}

.page-about .about-hero__inner {
  width: 100%;
  padding: 34px 22px 30px;
  color: var(--paper);
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-about .breadcrumbs__link,
.page-about .breadcrumbs__sep,
.page-about .breadcrumbs__current {
  color: rgba(247, 243, 234, 0.68);
  text-decoration: none;
}

.page-about .breadcrumbs__current {
  color: var(--paper);
}

.page-about .breadcrumbs__link:hover {
  color: var(--gold-tint);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 12px;
  color: var(--gold-tint);
  letter-spacing: 0.18em;
}

.page-about .about-hero__title {
  margin: 0 0 16px;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.6vw, 62px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 36em;
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.8;
  color: rgba(247, 243, 234, 0.86);
}

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

.page-about .about-hero__actions .btn--ghost {
  color: var(--paper);
  background: transparent;
  border: 1px solid rgba(247, 243, 234, 0.45);
}

.page-about .about-hero__actions .btn--ghost:hover {
  border-color: var(--gold-tint);
  color: var(--gold-tint);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid rgba(247, 243, 234, 0.24);
}

.page-about .about-hero__stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: rgba(247, 243, 234, 0.74);
}

.page-about .about-hero__stat b {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-hero__vertical {
  display: none;
}

/* ============ 服务演进时间线 ============ */
.page-about .about-path {
  padding: 64px 0 44px;
}

.page-about .about-path__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-path__head .display {
  margin: 10px 0 14px;
}

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

.page-about .timeline__item {
  position: relative;
  padding: 0 0 34px 30px;
  border-left: 1px solid var(--line);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--turquoise);
  box-shadow: 0 0 0 4px var(--paper);
}

.page-about .timeline__item--a::before {
  background: var(--crimson);
}

.page-about .timeline__item--b::before {
  background: var(--gold);
}

.page-about .timeline__item--c::before {
  background: var(--turquoise);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ============ 改版要点 ============ */
.page-about .about-revision {
  padding: 40px 0 60px;
}

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

.page-about .about-revision__main .display {
  margin: 10px 0 14px;
}

.page-about .change-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .change-list__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .change-list__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--crimson);
}

.page-about .change-list__title {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .change-list__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-revision__aside {
  padding: 24px 20px;
  background: var(--sand);
  border-radius: var(--radius-lg);
}

.page-about .fee-brief__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--crimson);
}

.page-about .fee-brief {
  display: block;
}

.page-about .fee-brief__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(31, 42, 58, 0.18);
}

.page-about .fee-brief__row:last-of-type {
  border-bottom: 0;
}

.page-about .fee-brief__key {
  font-size: 13.5px;
  color: var(--slate);
}

.page-about .fee-brief__val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .fee-brief__note {
  margin: 16px 0 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .fee-brief__link {
  color: var(--crimson);
}

/* ============ 团队 ============ */
.page-about .about-team {
  padding: 60px 0;
  background: linear-gradient(180deg, var(--paper) 0%, var(--turquoise-tint) 14%, var(--turquoise-tint) 86%, var(--paper) 100%);
}

.page-about .section-head .display {
  margin: 10px 0 14px;
}

.page-about .about-team__layout {
  display: grid;
  gap: 26px;
  margin-top: 32px;
}

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

.page-about .team-cards {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-card {
  padding: 20px 18px 18px;
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--turquoise);
  border-radius: var(--radius-lg);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.page-about .team-card--catalog {
  border-left-color: var(--turquoise);
}

.page-about .team-card--search {
  border-left-color: var(--crimson);
}

.page-about .team-card--member {
  border-left-color: var(--gold);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.page-about .team-card:focus-visible {
  outline: 2px solid var(--crimson);
  outline-offset: 3px;
}

.page-about .team-card__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .team-card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  opacity: 0.65;
}

.page-about .team-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
}

.page-about .team-card__role {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .team-card__more {
  max-height: none;
  overflow: hidden;
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--slate);
}

/* ============ 服务范围 ============ */
.page-about .about-reach {
  padding: 60px 0;
}

.page-about .about-reach__layout {
  display: grid;
  gap: 26px;
  margin-top: 32px;
}

.page-about .reach-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .reach-stat {
  padding: 18px 16px;
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
}

.page-about .reach-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--crimson);
}

.page-about .reach-stat--mint .reach-stat__num {
  color: var(--turquoise);
}

.page-about .reach-stat--gold .reach-stat__num {
  color: var(--gold);
}

.page-about .reach-stat--ink .reach-stat__num {
  color: var(--ink);
}

.page-about .reach-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .reach-map {
  display: grid;
  gap: 10px;
  margin-top: 32px;
}

.page-about .reach-node {
  padding: 14px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .reach-node > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .reach-node > summary::-webkit-details-marker {
  display: none;
}

.page-about .reach-node > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--turquoise);
}

.page-about .reach-node[open] > summary::after {
  content: "−";
}

.page-about .reach-node__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--turquoise);
}

.page-about .reach-node:nth-child(2) .reach-node__dot {
  background: var(--crimson);
}

.page-about .reach-node:nth-child(4) .reach-node__dot {
  background: var(--gold);
}

.page-about .reach-node__body {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate);
}

/* ============ 合作与报告 ============ */
.page-about .about-report {
  padding: 60px 0;
  background:
    radial-gradient(120% 100% at 0% 0%, rgba(241, 221, 224, 0.7) 0%, rgba(247, 243, 234, 0) 55%),
    var(--paper);
}

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

.page-about .about-report__main .display {
  margin: 10px 0 14px;
}

.page-about .about-report__text {
  margin: 16px 0 18px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--slate);
}

.page-about .about-report__link {
  color: var(--crimson);
  font-size: 14.5px;
}

.page-about .report-cover {
  position: relative;
  overflow: hidden;
  padding: 28px 24px 26px;
  border-radius: var(--radius-lg);
  color: var(--paper);
  background: linear-gradient(155deg, var(--ink) 0%, var(--slate) 58%, var(--turquoise) 100%);
  box-shadow: var(--shadow-soft);
}

.page-about .report-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(247, 243, 234, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 243, 234, 0.08) 1px, transparent 1px);
  background-size: 26px 26px;
}

.page-about .report-cover__kicker {
  position: relative;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold-tint);
}

.page-about .report-cover__title {
  position: relative;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.36;
}

.page-about .report-cover__sub {
  position: relative;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(247, 243, 234, 0.76);
}

.page-about .report-cover__year {
  position: relative;
  display: block;
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold-tint);
}

/* ============ 合作理由 ============ */
.page-about .about-why {
  padding: 60px 0 72px;
}

.page-about .why-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .why-item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .why-item__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
}

.page-about .why-item__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .why-item__text {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
}

.page-about .about-cta__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about {
    --about-gutter: 32px;
  }

  .page-about .about-hero__inner {
    padding: 48px 40px 42px;
  }

  .page-about .about-hero__frame {
    min-height: 540px;
  }

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

@media (min-width: 960px) {
  .page-about .section {
    padding: 76px 0;
  }

  .page-about .about-path {
    padding: 80px 0 56px;
  }

  .page-about .about-path__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-revision__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-reach__layout {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-report__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 48px;
    align-items: center;
  }

  .page-about .why-item {
    grid-template-columns: 54px 210px minmax(0, 1fr);
    align-items: baseline;
    padding: 22px 0;
  }

  .page-about .why-item__text {
    grid-column: 3;
    margin: 0;
  }
}

@media (hover: hover) and (min-width: 1024px) {
  .page-about .about-hero__vertical {
    display: block;
    position: absolute;
    top: 50%;
    right: 26px;
    transform: translateY(-50%);
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.34em;
    color: rgba(247, 243, 234, 0.55);
  }

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

  .page-about .team-card:nth-child(1) {
    margin-right: 26px;
  }

  .page-about .team-card:nth-child(2) {
    margin-left: 22px;
  }

  .page-about .team-card:nth-child(3) {
    margin-right: 34px;
  }

  .page-about .team-card__more {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease, margin-top 0.3s ease;
  }

  .page-about .team-card:hover .team-card__more,
  .page-about .team-card:focus-within .team-card__more {
    max-height: 16em;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (min-width: 1240px) {
  .page-about .about-hero__title {
    font-size: 62px;
  }

  .page-about .about-hero__frame {
    min-height: 600px;
  }
}

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

  .page-about .team-card:hover {
    transform: none;
  }

  .page-about .team-card__more {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
  }
}
<<<END>>>