.page-about {
  --about-hair: rgba(42, 52, 68, .8);
  --about-glow: rgba(67, 230, 224, .10);
  color: var(--bone);
  background:
    radial-gradient(820px 460px at 92% -6%, var(--about-glow), transparent 62%),
    radial-gradient(640px 400px at -6% 38%, rgba(232, 74, 168, .07), transparent 66%),
    var(--ink-0);
  overflow-x: clip;
}

.page-about .about-breadcrumb {
  padding-top: 18px;
}

.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--haze);
}

.page-about .crumbs__link {
  color: var(--haze);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .crumbs__link:hover,
.page-about .crumbs__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .crumbs__sep {
  color: var(--rock);
}

.page-about .crumbs__item {
  color: var(--bone);
}

/* ---------- 开场 ---------- */
.page-about .about-hero {
  padding-top: clamp(22px, 4vw, 46px);
  padding-bottom: clamp(36px, 6vw, 68px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero__lead .eyebrow {
  color: var(--cyan);
  letter-spacing: .16em;
}

.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -.025em;
  margin: 14px 0 18px;
  color: var(--bone);
}

.page-about .about-hero__accent {
  color: var(--cyan);
  text-shadow: 0 0 26px rgba(67, 230, 224, .28);
}

.page-about .about-hero .lede {
  max-width: 54ch;
  color: var(--haze);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  margin: 0 0 24px;
}

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

.page-about .about-hero__art {
  margin: 0;
  position: relative;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--line);
  background: var(--ink-1);
  overflow: hidden;
  box-shadow: 0 28px 64px -34px rgba(0, 0, 0, .95), 0 0 0 1px rgba(67, 230, 224, .06) inset;
}

.page-about .about-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1000 / 700;
  object-fit: cover;
}

.page-about .about-hero__art::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(67, 230, 224, .12), transparent 46%, rgba(232, 180, 90, .08));
}

/* 刻度尺 */
.page-about .about-scale {
  list-style: none;
  margin: clamp(28px, 4.4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-scale__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 16px 16px 18px;
  background: var(--ink-1);
}

.page-about .about-scale__item::before {
  content: "";
  position: absolute;
  top: 20px;
  right: 16px;
  width: 14px;
  height: 2px;
  background: var(--gold);
  opacity: .8;
}

.page-about .about-scale__num {
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 600;
  line-height: 1;
  color: var(--bone);
  letter-spacing: -.02em;
}

.page-about .about-scale__unit {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .08em;
}

.page-about .about-scale__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--haze);
  letter-spacing: .04em;
}

/* ---------- 通用区块 ---------- */
.page-about .about-sec {
  padding-top: clamp(38px, 6vw, 74px);
  padding-bottom: clamp(38px, 6vw, 74px);
  position: relative;
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-sec__head {
  max-width: 760px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-sec__head .eyebrow {
  color: var(--gold);
  letter-spacing: .18em;
}

.page-about .about-sec__head h2 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(24px, 3.8vw, 38px);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 10px 0 14px;
  color: var(--bone);
}

.page-about .about-sec__head p {
  margin: 0;
  color: var(--haze);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 运营刻度 ---------- */
.page-about .about-milestones__art {
  margin: 0 0 clamp(20px, 3.4vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-1);
}

.page-about .about-milestones__art img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1200 / 600;
  object-fit: cover;
}

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

.page-about .about-track__item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: 14px;
  padding-bottom: 30px;
}

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

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 40px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--rock), rgba(42, 52, 68, .18));
}

.page-about .about-track__item:last-child::before {
  display: none;
}

.page-about .about-track__stamp {
  grid-column: 2;
  grid-row: 1;
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-track__dot {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  position: relative;
  width: 40px;
  height: 40px;
}

.page-about .about-track__dot::before {
  display: none;
}

.page-about .about-track__dot::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-0);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(67, 230, 224, .10), 0 0 16px rgba(67, 230, 224, .45);
}

.page-about .about-track__body {
  grid-column: 2;
  grid-row: 2;
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  transition: border-color .2s var(--ease), transform .2s var(--ease), background .2s var(--ease);
}

.page-about .about-track__body h3 {
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin: 0 0 8px;
  color: var(--bone);
}

.page-about .about-track__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-about .about-track__item:hover .about-track__body {
  border-color: rgba(67, 230, 224, .5);
  background: #0E1829;
}

/* ---------- 协作与覆盖 ---------- */
.page-about .about-collab__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

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

.page-about .about-collab__art img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 900 / 600;
  object-fit: cover;
}

.page-about .about-collab__text {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bone);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-metrics__item {
  border: 1px solid var(--line);
  border-left: 2px solid var(--moss);
  border-radius: 10px;
  padding: 14px 14px 12px;
  background: rgba(12, 20, 36, .82);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-metrics__item:nth-child(2) {
  border-left-color: var(--clay);
}

.page-about .about-metrics__item:nth-child(3) {
  border-left-color: var(--cyan);
}

.page-about .about-metrics__item:nth-child(4) {
  border-left-color: var(--gold);
}

.page-about .about-metrics__num {
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
  color: var(--bone);
  letter-spacing: -.02em;
}

.page-about .about-metrics__name {
  font-size: 12px;
  line-height: 1.5;
  color: var(--haze);
}

.page-about .about-collab__note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--haze);
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__stat {
  background: var(--ink-1);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .about-team__num {
  font-size: clamp(22px, 4.4vw, 28px);
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -.02em;
}

.page-about .about-team__unit {
  font-size: 11px;
  color: var(--haze);
  letter-spacing: .12em;
}

.page-about .about-team__label {
  font-size: 12px;
  line-height: 1.55;
  color: var(--bone);
  margin-top: 4px;
}

.page-about .about-team__folds {
  display: grid;
  gap: 10px;
}

/* 折叠面板 */
.page-about .about-fold {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(12, 20, 36, .72);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-fold:hover {
  border-color: rgba(67, 230, 224, .35);
}

.page-about .about-fold[open] {
  border-color: rgba(232, 180, 90, .55);
  background: rgba(12, 20, 36, .95);
}

.page-about .about-fold__sum {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--bone);
}

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

.page-about .about-fold__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 12px;
}

.page-about .about-fold__idx {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 6px;
  flex: none;
}

.page-about .about-fold__name {
  font-weight: 500;
  line-height: 1.5;
}

.page-about .about-fold__sign {
  margin-left: auto;
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
}

.page-about .about-fold__sign::before,
.page-about .about-fold__sign::after {
  content: "";
  position: absolute;
  background: var(--gold);
  border-radius: 1px;
}

.page-about .about-fold__sign::before {
  inset: 5px 0 auto 0;
  height: 1.5px;
}

.page-about .about-fold__sign::after {
  inset: 0 5px 0 auto;
  width: 1.5px;
  transition: transform .18s var(--ease), opacity .18s var(--ease);
}

.page-about .about-fold[open] .about-fold__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-about .about-fold__panel {
  padding: 0 16px 16px 16px;
  border-top: 1px solid var(--line-soft);
  margin-top: -1px;
  padding-top: 14px;
}

.page-about .about-fold__panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--haze);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-principles__item {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
  background:
    linear-gradient(150deg, rgba(111, 143, 122, .09), transparent 58%),
    var(--ink-1);
}

.page-about .about-principles__item:nth-child(even) {
  background:
    linear-gradient(150deg, rgba(196, 116, 90, .10), transparent 58%),
    var(--ink-1);
}

.page-about .about-principles__idx {
  display: inline-block;
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .14em;
  margin-bottom: 10px;
}

.page-about .about-principles__item h3 {
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin: 0 0 8px;
  color: var(--bone);
}

.page-about .about-principles__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

/* ---------- 荣誉与报告 ---------- */
.page-about .about-recog__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  align-items: start;
}

.page-about .about-recog__badge {
  position: relative;
  border: 1px solid rgba(232, 180, 90, .38);
  border-radius: var(--radius);
  padding: 22px 20px 24px;
  background:
    radial-gradient(360px 200px at 100% 0%, rgba(232, 180, 90, .14), transparent 68%),
    var(--ink-1);
  overflow: hidden;
}

.page-about .about-recog__badge-year {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-recog__badge-text {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-size: clamp(18px, 3vw, 22px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--bone);
}

.page-about .about-recog__badge-line {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin-bottom: 14px;
}

.page-about .about-recog__badge-sub {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--haze);
}

.page-about .about-recog__folds {
  display: grid;
  gap: 10px;
}

/* ---------- 下一步 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-1);
  text-decoration: none;
  transition: border-color .2s var(--ease), transform .2s var(--ease), background .2s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: rgba(67, 230, 224, .55);
  background: #0E1829;
  transform: translateY(-3px);
}

.page-about .about-next__card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-next__idx {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-next__name {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--bone);
}

.page-about .about-next__desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--haze);
}

.page-about .about-contactbar {
  margin-top: clamp(22px, 3.4vw, 32px);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-contactbar__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .about-contactbar__row {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.page-about .about-contactbar__item {
  font-size: 13px;
  line-height: 1.7;
  color: var(--haze);
  word-break: break-word;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

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

  .page-about .about-track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    column-gap: 24px;
    margin-top: 8px;
  }

  .page-about .about-track__item {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto 40px auto;
    column-gap: 0;
    padding-bottom: 0;
  }

  .page-about .about-track__stamp {
    grid-column: 1;
    grid-row: 1;
    margin: 0 0 6px;
  }

  .page-about .about-track__dot {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
    height: 40px;
    align-self: center;
  }

  .page-about .about-track__dot::before {
    display: block;
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    right: -24px;
    height: 1px;
    transform: translateY(-50%);
    background: linear-gradient(90deg, rgba(42, 52, 68, .95), rgba(42, 52, 68, .3));
  }

  .page-about .about-track__dot::after {
    inset: auto;
    left: 0;
    top: 50%;
    margin: 0;
    transform: translateY(-50%);
  }

  .page-about .about-track__item::before {
    display: none;
  }

  .page-about .about-track__body {
    grid-column: 1;
    grid-row: 3;
  }

  .page-about .about-collab__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  }

  .page-about .about-recog__grid {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
  }

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

@media (min-width: 1180px) {
  .page-about .about-hero h1 {
    font-size: clamp(44px, 4.2vw, 58px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__body,
  .page-about .about-next__card,
  .page-about .about-fold,
  .page-about .about-fold__sign::after {
    transition: none;
  }

  .page-about .about-next__card:hover {
    transform: none;
  }
}
<<<END>>>