.page-about {
  --about-gutter: clamp(1rem, 3vw, 2rem);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-sec {
  padding: clamp(2.75rem, 7vw, 5.5rem) 0;
}

.page-about .about-link {
  display: inline-block;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--glacier);
  text-decoration: none;
  border-bottom: 1px solid var(--mist);
  padding-bottom: .15rem;
  transition: color .18s var(--ease-out), border-color .18s var(--ease-out);
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--maple-deep);
  border-bottom-color: var(--maple);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2.25rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(107, 79, 168, .10), transparent 62%),
    radial-gradient(90% 80% at 6% 96%, rgba(46, 158, 126, .09), transparent 60%),
    var(--paper);
  border-bottom: 1px solid var(--mist);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-hero__eyebrow {
  margin-top: 1.5rem;
}

.page-about .about-hero__title {
  margin: .7rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.02;
  font-size: clamp(2.15rem, 7.4vw, 4.4rem);
  max-width: 13em;
}

.page-about .about-hero__lead {
  margin: 1.35rem 0 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.85rem;
}

.page-about .about-hero__fig {
  margin: 0;
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-tile);
}

.page-about .about-hero__fig img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: start;
}

.page-about .about-origin__note {
  margin: 0;
  color: var(--rock);
  font-size: .9375rem;
}

.page-about .about-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: clamp(1.75rem, 4vw, 3rem);
  border-top: 1px solid var(--mist);
}

.page-about .about-principle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--mist);
  transition: transform .4s var(--ease-out);
}

.page-about .about-principle__num {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--mist);
  letter-spacing: -0.02em;
  padding-top: .15rem;
  transition: color .3s var(--ease-out);
}

.page-about .about-principle--a:hover .about-principle__num { color: var(--maple); }
.page-about .about-principle--b:hover .about-principle__num { color: var(--glacier); }
.page-about .about-principle--c:hover .about-principle__num { color: var(--aurora-green); }

.page-about .about-principle__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.01em;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  line-height: 1.35;
}

.page-about .about-principle__text {
  margin: .55rem 0 0;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--rock);
  max-width: 34em;
}

/* ---------- 数据面板 ---------- */
.page-about .about-scale__inner {
  background: var(--graphite);
  color: var(--paper);
  border-radius: 6px;
  padding: clamp(1.5rem, 4.5vw, 3rem);
  position: relative;
  overflow: hidden;
}

.page-about .about-scale__inner::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--aurora-purple), var(--aurora-green) 55%, var(--glacier));
}

.page-about .about-scale__eyebrow {
  color: var(--mist);
}
.page-about .about-scale__eyebrow::before {
  background: var(--maple);
}

.page-about .about-scale__title {
  margin: .75rem 0 0;
  color: var(--paper);
}

.page-about .about-scale__sub {
  margin: .8rem 0 0;
  color: var(--mist);
  font-size: .9375rem;
  line-height: 1.8;
  max-width: 32em;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  background: rgba(199, 203, 210, .22);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--graphite);
  padding: 1.35rem 1.1rem 1.5rem;
}

.page-about .about-stat__label {
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-stat__value {
  margin: .55rem 0 0;
  display: flex;
  align-items: baseline;
  gap: .3rem;
  color: var(--paper);
}

.page-about .about-stat__num {
  font-size: clamp(2.1rem, 8vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-stat:first-child .about-stat__num { color: #fff; }
.page-about .about-stat:nth-child(2) .about-stat__num { color: var(--ice); }
.page-about .about-stat:nth-child(3) .about-stat__num { color: var(--ice); }
.page-about .about-stat:nth-child(4) .about-stat__num { color: var(--aurora-green); }

.page-about .about-stat__unit {
  font-size: .875rem;
  color: var(--mist);
  letter-spacing: .02em;
}

.page-about .about-stat__desc {
  margin: .7rem 0 0;
  font-size: .8125rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 引言 ---------- */
.page-about .about-voice {
  padding-top: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-quote {
  margin: 0;
  border-left: 4px solid var(--glacier);
  padding: .35rem 0 .35rem 1.35rem;
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.015em;
  font-size: clamp(1.35rem, 4vw, 2.05rem);
  line-height: 1.45;
}

.page-about .about-quote__by {
  margin-top: 1rem;
  font-size: .8125rem;
  letter-spacing: .03em;
  color: var(--rock);
}

/* ---------- 适配共建 ---------- */
.page-about .about-adapt__fig {
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-tile);
}

.page-about .about-adapt__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .about-adapt__body p {
  margin-top: 0;
}

.page-about .about-adapt__list {
  list-style: none;
  margin: 1.35rem 0 1.5rem;
  padding: 0;
  display: grid;
  gap: .85rem;
}

.page-about .about-adapt__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-adapt__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--glacier);
}

.page-about .about-adapt__list strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 版本长廊 ---------- */
.page-about .about-eras {
  background: linear-gradient(180deg, rgba(220, 233, 245, .5), rgba(246, 245, 242, 0) 72%);
}

.page-about .about-eras__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  align-items: start;
}

.page-about .about-eras__note {
  margin: 0;
  color: var(--rock);
  font-size: .9375rem;
}

.page-about .about-eras__track {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-left: 1.5rem;
}

.page-about .about-eras__track::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--mist);
}

.page-about .about-era {
  position: relative;
  padding: .2rem 0 1.85rem;
  transition: transform .35s var(--ease-out);
}

.page-about .about-era:last-child {
  padding-bottom: .2rem;
}

.page-about .about-era__dot {
  position: absolute;
  left: -1.5rem;
  top: .5rem;
  width: 7px;
  height: 7px;
  margin-left: -3px;
  border-radius: 50%;
  background: var(--mist);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .about-era--current .about-era__dot {
  background: var(--maple);
  width: 10px;
  height: 10px;
  margin-left: -4.5px;
  box-shadow: 0 0 0 4px rgba(215, 38, 61, .16);
}

.page-about .about-era__year {
  margin: 0;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--rock);
}

.page-about .about-era__name {
  margin: .3rem 0 .5rem;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}

.page-about .about-era--archived .about-era__name {
  color: var(--rock);
}

.page-about .about-era__badge {
  font-family: var(--font-body);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: #fff;
  background: var(--maple);
  border-radius: 999px;
  padding: .22rem .55rem;
  line-height: 1.4;
}

.page-about .about-era__desc {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 32em;
}

.page-about .about-era__note {
  margin: .5rem 0 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--rock);
  border-left: 2px solid var(--mist);
  padding-left: .65rem;
}

.page-about .about-eras__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--mist);
}

/* ---------- 服务团队 ---------- */
.page-about .about-service__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-service__intro p {
  margin-top: .9rem;
  margin-bottom: 0;
}

.page-about .about-service__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-service__card {
  padding: 1.3rem 1.2rem 1.45rem;
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: 4px;
  box-shadow: var(--shadow-tile);
}

.page-about .about-service__card .cpc-tile__title {
  font-size: 1.0625rem;
  line-height: 1.45;
}

.page-about .about-service__card .cpc-tile__text {
  font-size: .875rem;
  line-height: 1.8;
  color: var(--rock);
}

/* ---------- 行业参与 ---------- */
.page-about .about-honor {
  border-top: 1px solid var(--mist);
}

.page-about .about-honor__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-honor__lead {
  margin-top: .9rem;
  margin-bottom: 0;
  color: var(--rock);
  font-size: .9375rem;
}

.page-about .about-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-honor__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .9rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--mist);
}

.page-about .about-honor__item:first-child {
  border-top: 1px solid var(--mist);
}

.page-about .about-honor__mark {
  width: 8px;
  height: 8px;
  margin-top: .55rem;
  border-radius: 2px;
  background: var(--maple);
  flex: none;
}

.page-about .about-honor__name {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .about-honor__text {
  margin: .3rem 0 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: 0 0 clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-next__inner {
  border: 1px solid var(--mist);
  border-radius: 6px;
  background: #fff;
  padding: clamp(1.4rem, 4vw, 2.6rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  box-shadow: var(--shadow-pill);
}

.page-about .about-next__desc {
  margin: .85rem 0 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--rock);
  max-width: 30em;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .85rem 1.35rem;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-origin__head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 2rem;
  }

  .page-about .about-principle {
    grid-template-columns: 5rem 1fr;
    gap: 1.5rem;
    padding: 2rem 0;
  }

  .page-about .about-principle__num {
    font-size: 1.9rem;
  }

  .page-about .about-principle--b {
    transform: translateX(clamp(1rem, 3vw, 2.6rem));
    width: calc(100% - clamp(1rem, 3vw, 2.6rem));
  }

  .page-about .about-principle--c {
    transform: translateX(clamp(.4rem, 1.2vw, 1rem));
    width: calc(100% - clamp(.4rem, 1.2vw, 1rem));
  }

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

  .page-about .about-stat {
    padding: 1.6rem 1.4rem 1.75rem;
  }

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

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7.2fr) minmax(0, 4.8fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-hero__lead {
    font-size: 1.0625rem;
  }

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

  .page-about .about-adapt__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-adapt__lead {
    position: sticky;
    top: 6rem;
    align-self: start;
  }

  .page-about .about-eras__head {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 2.5rem;
  }

  .page-about .about-eras__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
    padding-left: 0;
    padding-top: 2.25rem;
  }

  .page-about .about-eras__track::before {
    left: 0;
    right: 0;
    top: 5px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--mist), var(--mist) 60%, var(--maple));
  }

  .page-about .about-era {
    padding: 0;
  }

  .page-about .about-era__dot {
    left: 0;
    top: -2.25rem;
    margin-left: 0;
  }

  .page-about .about-era--current .about-era__dot {
    margin-left: -1.5px;
  }

  .page-about .about-era:hover {
    transform: translateY(-4px);
  }

  .page-about .about-era--current .about-era__name {
    color: var(--maple-deep);
  }

  .page-about .about-service__grid {
    grid-template-columns: minmax(0, 4.5fr) minmax(0, 7.5fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

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

  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-principle,
  .page-about .about-era,
  .page-about .about-link {
    transition: none;
  }
  .page-about .about-era:hover {
    transform: none;
  }
}
<<<END>>>