.page-about {
  --about-edge: clamp(16px, 3.6vw, 44px);
  --about-gap: clamp(18px, 3vw, 40px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: clamp(20px, 3.2vw, 34px) 0 0;
}

.page-about .about-crumb .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-text-dim);
}

.page-about .about-crumb .breadcrumb a {
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .22s var(--ease-out), color .22s var(--ease-out);
}

.page-about .about-crumb .breadcrumb a:hover,
.page-about .about-crumb .breadcrumb a:focus-visible {
  color: var(--c-blue);
  border-bottom-color: var(--c-blue);
  outline: none;
}

/* ---------- 品牌自述 ---------- */
.page-about .about-vision {
  padding: clamp(36px, 6vw, 78px) 0 clamp(46px, 8vw, 104px);
}

.page-about .about-vision__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-vision__title {
  margin: 16px 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(36px, 7.4vw, 92px);
  line-height: 1.04;
  letter-spacing: -.035em;
  color: var(--c-paper);
}

.page-about .about-vision__lede {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.92;
  color: var(--c-text);
  max-width: 62ch;
}

.page-about .about-vision__note {
  display: none;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .34em;
  color: var(--c-line);
  margin: 0;
  justify-self: end;
}

.page-about .about-vision__banner {
  margin: clamp(30px, 4.6vw, 58px) 0 0;
}

.page-about .about-vision__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 2 / 1;
  border: var(--frame) solid var(--c-line);
  box-shadow: var(--shadow-hard);
  background: var(--c-deep-2);
}

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

.page-about .about-vision__banner .figure__cap {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-text-dim);
}

.page-about .about-vision__prose {
  margin: clamp(30px, 4.6vw, 60px) 0 0;
  display: grid;
  gap: clamp(18px, 2.2vw, 28px);
  max-width: 78ch;
}

.page-about .about-vision__prose p {
  margin: 0;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.98;
  color: var(--c-text);
}

/* ---------- 通用小节头 ---------- */
.page-about .about-head {
  max-width: 76ch;
}

.page-about .about-head__title {
  margin: 14px 0 0;
  font-size: clamp(28px, 4.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -.025em;
  color: var(--c-paper);
}

.page-about .about-head__text {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.9;
  color: var(--c-text-dim);
}

/* ---------- 服务版图 ---------- */
.page-about .about-coverage {
  padding: clamp(48px, 8vw, 108px) 0;
  background: var(--c-deep-2);
  border-top: var(--frame) solid var(--c-line);
  border-bottom: var(--frame) solid var(--c-line);
}

.page-about .about-coverage__map {
  position: relative;
  margin: clamp(28px, 4vw, 52px) 0 0;
  border: var(--frame) solid var(--c-line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--c-deep-3);
}

.page-about .about-coverage__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.65);
  pointer-events: none;
}

.page-about .about-coverage__zones {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: clamp(18px, 2.6vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 24px);
}

.page-about .about-zone {
  padding: clamp(18px, 2.2vw, 28px);
  border: 2px solid var(--c-line);
  background: rgba(14, 42, 36, .84);
  transition: border-color .3s var(--ease-out), background-color .3s var(--ease-out), transform .3s var(--ease-out);
}

.page-about .about-zone:hover,
.page-about .about-zone:focus-visible {
  border-color: var(--c-gold);
  background: rgba(20, 58, 50, .95);
  transform: translateY(-4px);
  outline: none;
}

.page-about .about-zone__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--c-gold);
}

.page-about .about-zone__name {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-paper);
}

.page-about .about-zone__desc {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-text);
}

.page-about .about-zone__meta {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  display: grid;
  gap: 8px;
}

.page-about .about-zone__meta > div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-zone__meta dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-text-dim);
}

.page-about .about-zone__meta dd {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--c-blue);
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: var(--frame) solid var(--c-line);
  border-left: var(--frame) solid var(--c-line);
}

.page-about .about-figure {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.2vw, 26px);
  border-right: var(--frame) solid var(--c-line);
  border-bottom: var(--frame) solid var(--c-line);
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--c-gold);
}

.page-about .about-figure__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-text-dim);
}

/* ---------- 发展历程 ---------- */
.page-about .about-journey {
  padding: clamp(52px, 8vw, 112px) 0;
  position: relative;
}

.page-about .about-head--split {
  max-width: 46ch;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(34px, 5vw, 66px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.6vw, 54px);
}

.page-about .about-timeline__axis {
  position: absolute;
  top: 0;
  left: 8px;
  width: 34px;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

.page-about .about-timeline__axis path {
  fill: none;
  stroke: var(--c-gold);
  stroke-width: 2;
  stroke-dasharray: 7 9;
  opacity: .6;
  vector-effect: non-scaling-stroke;
}

.page-about .about-tl-node {
  position: relative;
  padding-left: 56px;
}

.page-about .about-tl-dot {
  position: absolute;
  left: 17px;
  top: 22px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--c-gold);
  background: var(--c-deep);
}

.page-about .about-tl-card {
  padding: clamp(18px, 2.2vw, 28px);
  border: var(--frame) solid var(--c-line);
  background: var(--c-deep-2);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color .3s var(--ease-out), transform .3s var(--ease-out);
}

.page-about .about-tl-card:hover {
  border-color: var(--c-gold);
  transform: translateY(-3px);
}

.page-about .about-tl-stage {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--c-gold);
}

.page-about .about-tl-title {
  margin: 12px 0 0;
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-paper);
}

.page-about .about-tl-text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-text);
}

/* ---------- 运营团队 ---------- */
.page-about .about-team {
  padding: clamp(48px, 8vw, 108px) 0;
  background: var(--c-paper);
  color: var(--c-ink);
  border-top: var(--frame) solid var(--c-deep);
  border-bottom: var(--frame) solid var(--c-deep);
}

.page-about .about-team__eyebrow {
  color: #8A6A1E;
}

.page-about .about-team__title {
  margin: 14px 0 0;
  font-size: clamp(28px, 4.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -.025em;
  color: var(--c-ink);
}

.page-about .about-team__text {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.9;
  color: #3C4A44;
}

.page-about .about-team__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 46px);
  align-items: end;
}

.page-about .about-team__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 10 / 7;
  border: var(--frame) solid var(--c-deep);
  box-shadow: var(--shadow-hard-sm);
  background: #E6E1D6;
}

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

.page-about .about-team__fig .figure__cap {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: #55635C;
}

.page-about .about-roles {
  list-style: none;
  margin: clamp(30px, 4.4vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--frame) solid var(--c-deep);
  border-left: var(--frame) solid var(--c-deep);
}

.page-about .about-role {
  padding: clamp(18px, 2.2vw, 28px);
  border-right: var(--frame) solid var(--c-deep);
  border-bottom: var(--frame) solid var(--c-deep);
  background: var(--c-paper);
  transition: background-color .26s var(--ease-out);
}

.page-about .about-role:hover {
  background: var(--c-pale);
}

.page-about .about-role__tag {
  display: block;
  font-size: 11px;
  letter-spacing: .22em;
  color: #8A6A1E;
}

.page-about .about-role__name {
  margin: 12px 0 0;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-ink);
}

.page-about .about-role__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: #3C4A44;
}

/* ---------- 长期回访 ---------- */
.page-about .about-return {
  padding: clamp(50px, 8vw, 112px) 0;
  background: var(--c-deep);
}

.page-about .about-flow {
  list-style: none;
  margin: clamp(32px, 4.6vw, 58px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-flow > li {
  position: relative;
  padding: 22px 0 0;
  margin-bottom: 26px;
  border-top: 2px solid var(--c-line);
}

.page-about .about-flow > li::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-gold);
  border: 3px solid var(--c-deep);
}

.page-about .about-flow > li:last-child {
  margin-bottom: 0;
}

.page-about .about-flow__idx {
  display: block;
  font-size: 11.5px;
  letter-spacing: .22em;
  color: var(--c-blue);
}

.page-about .about-flow__name {
  margin: 10px 0 0;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-paper);
}

.page-about .about-flow__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--c-text-dim);
}

.page-about .about-links {
  margin: clamp(38px, 5vw, 66px) 0 0;
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 2px solid var(--c-line);
}

.page-about .about-links__text {
  margin: 0 0 20px;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .about-links__row {
  flex-wrap: wrap;
}

.page-about .about-links__note {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--c-text-dim);
  word-break: break-word;
}

/* ---------- 楼层导视 ---------- */
.page-about .about-floor {
  display: none;
  position: fixed;
  right: clamp(14px, 2vw, 30px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-floor a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 11px;
  border-left: 2px solid var(--c-line);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-text-dim);
  text-decoration: none;
  transition: color .24s var(--ease-out), border-color .24s var(--ease-out);
}

.page-about .about-floor a span {
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--c-line);
}

.page-about .about-floor a:hover,
.page-about .about-floor a:focus-visible {
  color: var(--c-blue);
  border-left-color: var(--c-blue);
  outline: none;
}

.page-about .about-floor a:hover span,
.page-about .about-floor a:focus-visible span {
  color: var(--c-blue);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-team__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, .86fr);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-vision__grid {
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: clamp(24px, 3vw, 44px);
  }

  .page-about .about-vision__note {
    display: block;
    padding-top: 14px;
  }

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

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

  .page-about .about-timeline__axis {
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
  }

  .page-about .about-tl-node {
    width: calc(50% - 52px);
    padding-left: 0;
  }

  .page-about .about-tl-node--l {
    justify-self: start;
  }

  .page-about .about-tl-node--r {
    justify-self: end;
  }

  .page-about .about-tl-node--l .about-tl-dot {
    left: auto;
    right: -60px;
  }

  .page-about .about-tl-node--r .about-tl-dot {
    left: -60px;
  }

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

  .page-about .about-flow > li {
    margin-bottom: 0;
    padding: 28px 22px 0 0;
    border-top: 3px solid var(--c-gold);
  }

  .page-about .about-flow > li::before {
    top: -9px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1400px) {
  .page-about .about-floor {
    display: flex;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-zone,
  .page-about .about-tl-card,
  .page-about .about-role,
  .page-about .about-floor a,
  .page-about .about-crumb .breadcrumb a {
    transition: none;
  }

  .page-about .about-zone:hover,
  .page-about .about-zone:focus-visible,
  .page-about .about-tl-card:hover {
    transform: none;
  }
}
<<<END>>>