.page-about {
  --about-index-w: 236px;
  position: relative;
  color: var(--paper);
  font-family: var(--font-body);
  background-color: var(--night);
  background-image:
    linear-gradient(rgba(159, 216, 210, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 216, 210, .055) 1px, transparent 1px);
  background-size: 72px 72px;
  overflow-x: hidden;
}

.page-about [id] {
  scroll-margin-top: 104px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 44px) clamp(44px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(212, 175, 55, .14), transparent 58%),
    linear-gradient(180deg, rgba(18, 11, 31, .94), rgba(43, 27, 74, .82) 56%, rgba(26, 16, 46, .96));
  border-bottom: 1px solid var(--line-gold);
}

.page-about .breadcrumb__link,
.page-about .breadcrumb__current {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__title {
  margin: .5em 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 60px);
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--mist);
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--gold);
  text-shadow: 0 0 22px rgba(212, 175, 55, .26);
}

.page-about .about-hero__intro {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(245, 240, 230, .8);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  background: var(--line-mist);
  border: 1px solid var(--line-mist);
}

.page-about .about-stat {
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2vw, 22px);
  background: rgba(18, 11, 31, .62);
}

.page-about .about-stat__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(232, 217, 168, .72);
}

.page-about .about-stat__value {
  margin: 6px 0 0;
  font-family: var(--font-data);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-stat__value span {
  margin-left: 4px;
  font-size: 12px;
  font-weight: 400;
  color: var(--glacier);
  letter-spacing: .04em;
}

/* ---------- 主布局：索引 + 正文 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-block: clamp(36px, 6vw, 80px) clamp(56px, 8vw, 96px);
}

.page-about .about-index {
  border-top: 1px solid var(--line-gold);
  padding-top: 14px;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--gold);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-mist);
  font-size: 13px;
  color: rgba(245, 240, 230, .84);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}

.page-about .about-index__num {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--glacier);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .about-index__years {
  margin-top: 18px;
}

.page-about .about-index__years-title {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .28em;
  color: rgba(232, 217, 168, .7);
}

.page-about .about-index__year-list {
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__year {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--glacier);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}

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

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(8px, 1.5vw, 16px) clamp(40px, 6vw, 72px);
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--line-mist);
  padding-top: clamp(32px, 5vw, 56px);
}

.page-about .about-chapter__title {
  margin: .35em 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.32;
  color: var(--mist);
}

.page-about .about-chapter__lead {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.9;
  color: rgba(245, 240, 230, .9);
}

.page-about .about-chapter__note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(232, 217, 168, .74);
}

.page-about .about-chapter p {
  font-size: 15px;
  line-height: 1.9;
  color: rgba(245, 240, 230, .78);
}

.page-about .about-chapter__foot {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-mist);
  font-size: 14px;
}

.page-about .about-inline-link {
  color: var(--glacier);
  text-decoration: none;
  border-bottom: 1px solid var(--line-ice);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .about-taglist {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-era {
  display: grid;
  gap: 12px;
  padding-block: clamp(24px, 3.6vw, 40px);
  border-top: 1px solid var(--line-mist);
}

.page-about .about-era:last-child {
  border-bottom: 1px solid var(--line-mist);
}

.page-about .about-era__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-era__num {
  font-family: var(--font-data);
  font-size: 11px;
  color: rgba(232, 217, 168, .66);
  letter-spacing: .18em;
}

.page-about .about-era__year-num {
  font-family: var(--font-data);
  font-size: clamp(24px, 3.6vw, 32px);
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.page-about .about-era__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.45;
  color: var(--mist);
}

.page-about .about-era__body p {
  margin: 12px 0 0;
}

.page-about .about-era__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-era__list li {
  position: relative;
  padding-left: 20px;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(159, 216, 210, .88);
}

.page-about .about-era__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--ochre);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  margin-top: clamp(22px, 3vw, 32px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__text p {
  margin: 0 0 14px;
}

.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: clamp(26px, 3.6vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-mist);
  border: 1px solid var(--line-mist);
}

.page-about .about-step {
  padding: clamp(16px, 2.4vw, 24px);
  background: rgba(18, 11, 31, .6);
}

.page-about .about-step__num {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ochre);
}

.page-about .about-step__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--gold);
}

.page-about .about-step p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 认证 ---------- */
.page-about .about-cred {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  margin-top: clamp(22px, 3vw, 32px);
  align-items: start;
}

.page-about .about-cred__figure {
  margin: 0;
}

.page-about .about-cred__grid {
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
}

.page-about .about-cred__card {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line-gold);
  background: linear-gradient(158deg, rgba(43, 27, 74, .92), rgba(18, 11, 31, .88));
  clip-path: var(--slant);
  transition: transform .26s var(--ease), border-color .26s var(--ease);
}

.page-about .about-cred__card:hover,
.page-about .about-cred__card:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.page-about .about-cred__code {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--glacier);
}

.page-about .about-cred__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-cred__card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 合作与覆盖 ---------- */
.page-about .about-cover {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3vw, 32px);
  background: var(--line-mist);
  border: 1px solid var(--line-mist);
}

.page-about .about-cover__item {
  padding: clamp(16px, 2.4vw, 22px);
  background: rgba(26, 16, 46, .82);
}

.page-about .about-cover__num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  color: var(--glacier);
  line-height: 1;
}

.page-about .about-cover__unit {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(232, 217, 168, .78);
}

.page-about .about-cover__item p {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(245, 240, 230, .72);
}

.page-about .about-map {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(24px, 3.4vw, 36px);
  padding: clamp(20px, 3vw, 30px);
  border-left: 3px solid var(--ochre);
  background: linear-gradient(90deg, rgba(166, 90, 46, .14), rgba(26, 16, 46, .5));
}

.page-about .about-map__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--mist);
}

.page-about .about-map__text p {
  margin: 12px 0 0;
}

.page-about .about-map__dots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14px, 1fr));
  gap: 8px;
  align-content: start;
  max-width: 420px;
}

.page-about .about-map__dots span {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: var(--glacier);
  opacity: .3;
}

.page-about .about-map__dots span:nth-child(3n) {
  background: var(--gold);
  opacity: .55;
}

.page-about .about-map__dots span:nth-child(7n) {
  background: var(--ochre);
  opacity: .6;
}

/* ---------- 服务 ---------- */
.page-about .about-service {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .about-service__row {
  display: grid;
  gap: 6px;
  padding-block: 16px;
  border-bottom: 1px solid var(--line-mist);
}

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

.page-about .about-service dt {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-service dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 240, 230, .78);
}

.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(24px, 3.6vw, 40px);
  border: 1px solid var(--line-gold);
  background:
    radial-gradient(110% 120% at 100% 0%, rgba(212, 175, 55, .16), transparent 60%),
    linear-gradient(160deg, rgba(43, 27, 74, .95), rgba(18, 11, 31, .92));
  clip-path: var(--slant);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.42;
  color: var(--mist);
}

.page-about .about-cta__text p {
  margin: 12px 0 0;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-era {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
  }

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

  .page-about .about-service__row {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: center;
  }

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

  .page-about .about-cred__figure {
    position: sticky;
    top: 104px;
  }

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

  .page-about .about-map {
    grid-template-columns: minmax(0, 1fr) minmax(0, .8fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding-top: 16px;
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__item + .about-index__item {
    margin-top: 4px;
  }

  .page-about .about-index__link {
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: 9px 0 9px 12px;
    white-space: normal;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--gold);
    background: rgba(212, 175, 55, .07);
  }
}

@media (max-width: 559px) {
  .page-about .about-cover {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-map {
    border-left-width: 2px;
  }

  .page-about .about-hero__actions .btn,
  .page-about .about-cta__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cred__card,
  .page-about .about-index__link,
  .page-about .about-index__year {
    transition: none;
  }

  .page-about .about-cred__card:hover,
  .page-about .about-cred__card:focus-within {
    transform: none;
  }
}
<<<END>>>