.page-about {
  --abt-panel: linear-gradient(158deg, rgba(11, 38, 56, .9), rgba(7, 27, 42, .95));
  --abt-rule: rgba(126, 150, 166, .2);
}

.page-about :focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .abt-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 62px) 0 clamp(52px, 7vw, 92px);
  background:
    radial-gradient(120% 95% at 88% 4%, rgba(232, 176, 74, .14), transparent 58%),
    radial-gradient(85% 70% at 4% 0%, rgba(46, 196, 166, .09), transparent 62%),
    var(--abyss-950);
}

.page-about .abt-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-gold-strong), transparent);
}

.page-about .abt-hero .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .abt-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .abt-hero h1 {
  margin: .28em 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--mist-100);
  text-shadow: 0 0 1px rgba(246, 213, 138, .55), 0 8px 26px rgba(232, 176, 74, .14);
}

.page-about .abt-hero .lede {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 46ch;
  color: var(--ink-soft);
}

.page-about .abt-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--abt-rule);
  border: 1px solid var(--abt-rule);
}

.page-about .abt-stat {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 16px 14px;
  background: var(--abyss-900);
}

.page-about .abt-stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold-500);
}

.page-about .abt-stat__label {
  font-size: .8125rem;
  line-height: 1.4;
  letter-spacing: .03em;
  color: var(--slate-400);
}

.page-about .abt-hero__media {
  margin: 0;
}

.page-about .abt-hero__media .frame {
  box-shadow: 0 26px 60px -34px rgba(0, 0, 0, .95);
}

/* ---------- 主壳：索引 + 内容列 ---------- */
.page-about .abt-body {
  padding-top: clamp(48px, 7vw, 88px);
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-about .abt-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .abt-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--slate-400);
}

.page-about .abt-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  border-top: 1px solid var(--line-gold);
}

.page-about .abt-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 0;
  font-size: .875rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .abt-index__link:hover,
.page-about .abt-index__link:focus-visible {
  color: var(--gold-300);
  border-bottom-color: var(--gold-500);
}

.page-about .abt-index__num {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--gold-500);
}

/* ---------- 章节通用 ---------- */
.page-about .abt-block + .abt-block {
  margin-top: clamp(52px, 8vw, 96px);
}

.page-about .abt-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: clamp(12px, 2vw, 22px);
}

.page-about .abt-block__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 6vw, 3.9rem);
  line-height: .82;
  letter-spacing: -.03em;
  color: rgba(232, 176, 74, .14);
  -webkit-text-stroke: 1px rgba(232, 176, 74, .5);
}

.page-about .abt-block__head .section-title {
  margin: 0;
}

.page-about .abt-prose {
  margin-top: clamp(18px, 3vw, 28px);
  max-width: 60ch;
}

.page-about .abt-prose p {
  margin: 0 0 1.05em;
  color: var(--ink-soft);
  line-height: 1.78;
}

.page-about .abt-prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 时间轴 ---------- */
.page-about .abt-bandimg {
  margin-top: clamp(22px, 3vw, 32px);
  height: clamp(96px, 14vw, 150px);
}

.page-about .abt-bandimg img {
  height: 100%;
  object-fit: cover;
}

.page-about .abt-tl {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .abt-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(232, 176, 74, .55), rgba(232, 176, 74, .08));
}

.page-about .abt-tl__item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 38px) clamp(26px, 4vw, 38px);
}

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

.page-about .abt-tl__dot {
  position: absolute;
  left: 0;
  top: 8px;
  width: 15px;
  height: 15px;
  background: var(--abyss-950);
  border: 1px solid var(--gold-500);
  transform: rotate(45deg);
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .abt-tl__item:hover .abt-tl__dot,
.page-about .abt-tl__item:focus-within .abt-tl__dot {
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(232, 176, 74, .16);
}

.page-about .abt-tl__card {
  border: 1px solid var(--abt-rule);
  border-radius: 2px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--abt-panel);
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.page-about .abt-tl__item:hover .abt-tl__card,
.page-about .abt-tl__item:focus-within .abt-tl__card {
  transform: translateY(-2px);
  border-color: var(--line-gold-strong);
  box-shadow: 0 16px 36px -24px rgba(0, 0, 0, .95), 0 0 0 1px rgba(232, 176, 74, .1);
}

.page-about .abt-tl__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px;
}

.page-about .abt-tl__ver {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--gold-500);
  border: 1px solid var(--line-gold);
}

.page-about .abt-tl__name {
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--slate-400);
}

.page-about .abt-tl__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.35;
  color: var(--mist-100);
}

.page-about .abt-tl__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .abt-tl__tip {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding-top: 0;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--gold-300);
  border-top: 1px dashed transparent;
  transition: max-height var(--ease), opacity var(--ease), margin-top var(--ease),
    padding-top var(--ease), border-color var(--ease);
}

.page-about .abt-tl__item:hover .abt-tl__tip,
.page-about .abt-tl__item:focus-within .abt-tl__tip {
  max-height: 9em;
  opacity: 1;
  margin-top: 14px;
  padding-top: 12px;
  border-top-color: var(--line-gold);
}

/* ---------- 全宽对照带 ---------- */
.page-about .abt-band {
  margin-top: clamp(52px, 8vw, 96px);
  padding: clamp(42px, 6vw, 78px) 0;
  border-top: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-gold);
  background:
    repeating-linear-gradient(90deg, rgba(232, 176, 74, .05) 0 1px, transparent 1px 76px),
    linear-gradient(180deg, var(--abyss-900), var(--abyss-950));
}

.page-about .abt-band .section-title {
  max-width: 26ch;
}

.page-about .abt-tablewrap {
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .abt-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-family: var(--font-body);
}

.page-about .abt-table thead th {
  padding: 0 18px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--gold-300);
  border-bottom: 1px solid var(--line-gold-strong);
  white-space: nowrap;
}

.page-about .abt-table tbody th {
  padding: 16px 18px;
  text-align: left;
  vertical-align: top;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .9375rem;
  color: var(--mist-100);
  border-bottom: 1px solid var(--abt-rule);
  white-space: nowrap;
}

.page-about .abt-table tbody td {
  padding: 16px 18px;
  vertical-align: top;
  font-size: .9375rem;
  line-height: 1.72;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--abt-rule);
}

.page-about .abt-table tbody tr:last-child th,
.page-about .abt-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .abt-table tbody tr {
  transition: background var(--ease);
}

.page-about .abt-table tbody tr:hover {
  background: rgba(232, 176, 74, .06);
}

/* ---------- 团队 ---------- */
.page-about .abt-teamsec__lede {
  margin-top: clamp(16px, 2.6vw, 24px);
  max-width: 56ch;
}

.page-about .abt-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .abt-team__card {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid var(--abt-rule);
  background: var(--abt-panel);
  transition: transform var(--ease), border-color var(--ease);
}

.page-about .abt-team__card::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -60px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(232, 176, 74, .18), transparent 70%);
  opacity: 0;
  transition: opacity var(--ease);
  pointer-events: none;
}

.page-about .abt-team__card:hover,
.page-about .abt-team__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--line-gold-strong);
}

.page-about .abt-team__card:hover::after,
.page-about .abt-team__card:focus-visible::after {
  opacity: 1;
}

.page-about .abt-team__count {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--slate-400);
}

.page-about .abt-team__num {
  font-size: clamp(1.9rem, 4vw, 2.5rem);
  line-height: 1;
  color: var(--gold-500);
  margin-right: 6px;
  vertical-align: -2px;
}

.page-about .abt-team__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--mist-100);
}

.page-about .abt-team__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .abt-team__kw {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--ease), opacity var(--ease), margin-top var(--ease);
}

.page-about .abt-team__kw span {
  padding: 3px 9px;
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--gold-300);
  border: 1px solid var(--line-gold);
}

.page-about .abt-team__card:hover .abt-team__kw,
.page-about .abt-team__card:focus-visible .abt-team__kw,
.page-about .abt-team__card:focus-within .abt-team__kw {
  max-height: 6em;
  opacity: 1;
  margin-top: 16px;
}

.page-about .abt-team__figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
}

/* ---------- 覆盖范围 ---------- */
.page-about .abt-reachsec {
  padding-top: clamp(52px, 8vw, 96px);
}

.page-about .abt-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .abt-reach__text {
  margin-top: 0;
}

.page-about .abt-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .abt-metric {
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line-gold);
  background: linear-gradient(180deg, rgba(232, 176, 74, .08), transparent 72%);
}

.page-about .abt-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--gold-300);
}

.page-about .abt-metric__num small {
  margin-left: 2px;
  font-size: .48em;
  letter-spacing: .04em;
  color: var(--gold-500);
}

.page-about .abt-metric__label {
  display: block;
  margin-top: 10px;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--slate-400);
}

/* ---------- 自查与认可 ---------- */
.page-about .abt-proofsec {
  padding-top: clamp(52px, 8vw, 96px);
  padding-bottom: clamp(56px, 8vw, 100px);
}

.page-about .abt-proofsec .lede {
  margin-top: clamp(16px, 2.6vw, 24px);
}

.page-about .abt-proof__list {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
}

.page-about .abt-proof__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid var(--abt-rule);
}

.page-about .abt-proof__item:last-child {
  border-bottom: 1px solid var(--abt-rule);
}

.page-about .abt-proof__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--gold-500);
}

.page-about .abt-proof__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .abt-next {
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-gold);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 107, 74, .12), transparent 62%),
    var(--abyss-900);
}

.page-about .abt-next__text {
  margin: 0 0 18px;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .abt-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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

  .page-about .abt-index__list {
    flex-wrap: nowrap;
    gap: 0 clamp(14px, 2vw, 26px);
    border-top: 0;
    border-left: 1px solid var(--line-gold);
    padding-left: 14px;
  }

  .page-about .abt-index__link {
    border-bottom: 0;
    border-left: 2px solid transparent;
    padding: 6px 0 6px 0;
    margin-left: -16px;
    padding-left: 14px;
  }

  .page-about .abt-index__link:hover,
  .page-about .abt-index__link:focus-visible {
    border-left-color: var(--gold-500);
    border-bottom-color: transparent;
  }

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

  .page-about .abt-proof__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .abt-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

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

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

@media (min-width: 1000px) {
  .page-about .abt-shell {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-about .abt-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .abt-index__list {
    flex-wrap: wrap;
    border-top: 1px solid var(--line-gold);
    border-left: 0;
    padding-left: 0;
  }

  .page-about .abt-index__link {
    width: 100%;
    margin-left: 0;
    padding-left: 14px;
    border-left: 2px solid transparent;
    border-bottom: 0;
  }

  .page-about .abt-index__link:hover,
  .page-about .abt-index__link:focus-visible {
    border-left-color: var(--gold-500);
    background: linear-gradient(90deg, rgba(232, 176, 74, .1), transparent);
  }

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

@media (max-width: 719px) {
  .page-about .abt-table tbody th {
    position: sticky;
    left: 0;
    z-index: 1;
    background: var(--abyss-900);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .abt-tl__card,
  .page-about .abt-tl__dot,
  .page-about .abt-team__card,
  .page-about .abt-tl__tip,
  .page-about .abt-team__kw,
  .page-about .abt-index__link {
    transition: none;
  }

  .page-about .abt-tl__item:hover .abt-tl__card,
  .page-about .abt-tl__item:focus-within .abt-tl__card,
  .page-about .abt-team__card:hover,
  .page-about .abt-team__card:focus-visible {
    transform: none;
  }
}
<<<END>>>