.page-about {
  --ab-index-w: 180px;
  --ab-gap: 28px;
}

.page-about .ab-hero {
  padding: 22px 0 0;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 90% at 92% -20%, rgba(47, 227, 208, 0.16), transparent 62%),
    repeating-linear-gradient(90deg, rgba(30, 90, 107, 0.16) 0 1px, transparent 1px 88px),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-about .ab-hero__grid {
  margin-top: 14px;
  align-items: start;
}

.page-about .ab-hero__copy h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 10px 0 16px;
  color: var(--mist);
  max-width: 18ch;
}

.page-about .ab-hero__copy .lede {
  color: rgba(234, 246, 247, 0.78);
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .ab-hero__media {
  margin-top: 24px;
}

.page-about .ab-hero__fig {
  margin: 0;
}

.page-about .ab-hero__fig .frame__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--steel);
  padding: 6px 10px;
  background: rgba(4, 18, 31, 0.82);
  border-top: 1px solid var(--line);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 26px 0 -1px;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-stat {
  padding: 14px 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
}

.page-about .ab-stat:nth-child(2n) {
  border-right: 0;
}

.page-about .ab-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

/* 目录 + 档案流 */
.page-about .ab-dossier {
  padding-top: 26px;
  padding-bottom: 56px;
}

.page-about .ab-index {
  margin-bottom: 22px;
}

.page-about .ab-index__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel);
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--cyan);
  display: inline-block;
}

.page-about .ab-index__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-index__link {
  display: block;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  color: rgba(234, 246, 247, 0.86);
  text-decoration: none;
  font-size: 13px;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .ab-index__link .num {
  font-family: var(--font-mono);
  color: var(--cyan);
  margin-right: 6px;
}

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

.page-about .ab-flow {
  min-width: 0;
}

.page-about .ab-sec {
  padding: 30px 0 10px;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--bar) + 24px);
}

.page-about .ab-sec:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .ab-sec--last {
  padding-bottom: 0;
}

.page-about .ab-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .ab-plate {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: var(--radius);
  background: rgba(10, 34, 54, 0.7);
}

.page-about .ab-sec h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--mist);
  margin: 0;
}

.page-about .ab-sec h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--mist);
  margin: 0 0 6px;
}

.page-about .ab-sec p {
  color: rgba(234, 246, 247, 0.78);
  line-height: 1.75;
  max-width: 68ch;
  margin: 0 0 14px;
}

.page-about .ab-sec__lede {
  font-size: 17px;
  color: rgba(234, 246, 247, 0.9) !important;
  border-left: 2px solid var(--coral);
  padding-left: 14px;
}

.page-about .ab-note {
  font-size: 14px;
  color: var(--steel) !important;
}

.page-about .ab-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 208, 0.45);
  padding-bottom: 1px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--cyan-glow);
  border-color: var(--cyan-glow);
}

/* 场馆字段 */
.page-about .ab-fields {
  list-style: none;
  margin: 18px 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-field {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: baseline;
}

.page-about .ab-field__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  min-width: 8.5em;
}

.page-about .ab-field__v {
  font-size: 14px;
  color: rgba(234, 246, 247, 0.76);
}

/* 版本时间线 */
.page-about .ab-track {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .ab-track__item {
  position: relative;
  padding: 0 0 24px 24px;
  border-left: 1px solid var(--line-soft);
}

.page-about .ab-track__item:last-child {
  border-left-color: transparent;
  padding-bottom: 4px;
}

.page-about .ab-track__dot {
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(47, 227, 208, 0.14);
}

.page-about .ab-track__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--coral);
  margin: 0 0 4px !important;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-track__title {
  font-size: 17px;
}

.page-about .ab-track__item p {
  margin: 0;
  font-size: 15px;
}

/* 团队分段切换 */
.page-about .ab-seg {
  margin-top: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--panel) 0%, var(--ink) 100%);
  overflow: hidden;
}

.page-about .ab-seg__bar {
  display: flex;
  flex-wrap: nowrap;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(18, 58, 82, 0.5);
}

.page-about .ab-seg__bar .seg__btn {
  flex: 0 0 auto;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--steel);
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line-soft);
  padding: 12px 16px;
  cursor: pointer;
  position: relative;
  transition: color 160ms var(--ease), background 160ms var(--ease);
}

.page-about .ab-seg__bar .seg__btn[aria-selected="true"] {
  color: var(--mist);
  background: rgba(47, 227, 208, 0.1);
}

.page-about .ab-seg__bar .seg__btn[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
}

.page-about .ab-seg__bar .seg__btn:hover,
.page-about .ab-seg__bar .seg__btn:focus-visible {
  color: var(--cyan-glow);
}

.page-about .ab-seg__panel {
  padding: 20px 18px 22px;
}

.page-about .ab-seg__panel[hidden] {
  display: none;
}

.page-about .ab-seg__num {
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  margin: 0 0 8px;
}

.page-about .ab-seg__panel p {
  font-size: 15px;
  margin-bottom: 0;
}

/* 流程手风琴 + 配图 */
.page-about .ab-process {
  display: grid;
  gap: 22px;
  margin-top: 18px;
}

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

.page-about .ab-acc .acc__item {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-acc .acc__btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  background: transparent;
  border: 0;
  padding: 14px 2px;
  color: var(--mist);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: color 160ms var(--ease);
}

.page-about .ab-acc .acc__btn:hover,
.page-about .ab-acc .acc__btn:focus-visible {
  color: var(--cyan-glow);
}

.page-about .ab-acc__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  border: 1px solid var(--line);
  padding: 1px 5px;
  flex: none;
}

.page-about .ab-acc__chev {
  margin-left: auto;
  flex: none;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
  transform: rotate(45deg);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .ab-acc .acc__btn[aria-expanded="true"] .ab-acc__chev {
  transform: rotate(-135deg);
  border-color: var(--coral);
}

.page-about .ab-acc .acc__panel {
  padding: 0 2px 16px 0;
}

.page-about .ab-acc .acc__panel p {
  font-size: 15px;
  margin: 0;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

/* 图片与展签 */
.page-about .ab-fig {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
}

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

.page-about .ab-fig .frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--mist);
  background: linear-gradient(90deg, rgba(4, 18, 31, 0.94), rgba(4, 18, 31, 0.6));
  border-top: 1px solid var(--line);
  padding: 8px 10px;
  opacity: 0.72;
  transform: translateY(6px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .ab-fig:hover .frame__tag,
.page-about .ab-fig:focus-within .frame__tag {
  opacity: 1;
  transform: translateY(0);
}

/* 合作与覆盖 */
.page-about .ab-partners {
  display: grid;
  gap: 22px;
  margin-top: 14px;
}

.page-about .ab-regions {
  list-style: none;
  margin: 16px 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-region {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
  border: 1px solid var(--line);
  background: rgba(18, 58, 82, 0.55);
  padding: 6px 12px;
  border-radius: var(--radius);
}

/* 荣誉 */
.page-about .ab-honors {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.page-about .ab-honor {
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--cyan);
  background: rgba(10, 34, 54, 0.66);
  padding: 16px;
  border-radius: var(--radius);
}

.page-about .ab-honor__year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--coral);
  margin: 0 0 6px;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-honor p {
  font-size: 15px;
  margin: 0;
}

/* 服务约定 */
.page-about .ab-promise {
  display: grid;
  gap: 18px;
  margin-top: 16px;
}

.page-about .ab-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-promise__item {
  position: relative;
  padding: 12px 0 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(234, 246, 247, 0.8);
}

.page-about .ab-promise__item .num {
  font-family: var(--font-mono);
  color: var(--cyan);
  margin-right: 8px;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-contact {
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, var(--panel-2) 0%, var(--ink) 100%);
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .ab-contact__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.5;
  color: var(--mist) !important;
  margin: 0 0 14px !important;
  max-width: none !important;
}

.page-about .ab-contact__rows {
  margin: 0 0 16px;
  padding: 0;
}

.page-about .ab-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  padding: 7px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-contact__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  min-width: 5.6em;
}

.page-about .ab-contact__row dd {
  margin: 0;
  font-size: 14px;
  color: rgba(234, 246, 247, 0.88);
}

.page-about .ab-contact__btn {
  display: inline-block;
}

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

  .page-about .ab-stat {
    border-bottom: 0;
  }

  .page-about .ab-stat:nth-child(2n) {
    border-right: 1px solid var(--line-soft);
  }

  .page-about .ab-stat:last-child {
    border-right: 0;
  }

  .page-about .ab-stat__num {
    font-size: 30px;
  }

  .page-about .ab-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 24px;
  }

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

  .page-about .ab-honor--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding-top: 26px;
  }

  .page-about .ab-hero__media {
    margin-top: 8px;
  }

  .page-about .ab-dossier {
    display: grid;
    grid-template-columns: var(--ab-index-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding-top: 44px;
    padding-bottom: 72px;
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--bar) + 20px);
    margin-bottom: 0;
  }

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

  .page-about .ab-index__item + .ab-index__item {
    margin-top: 2px;
  }

  .page-about .ab-index__link {
    padding: 8px 10px;
    border-color: transparent;
    border-left: 2px solid transparent;
    border-radius: 0;
    font-size: 13px;
  }

  .page-about .ab-index__link:hover,
  .page-about .ab-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(18, 58, 82, 0.5);
  }

  .page-about .ab-sec {
    padding: 38px 0 14px;
  }

  .page-about .ab-sec:first-child {
    padding-top: 0;
  }

  .page-about .ab-sec__lede {
    font-size: 18px;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .ab-partners {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-promise {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-seg__bar .seg__btn {
    font-size: 14px;
    padding: 13px 20px;
  }

  .page-about .ab-seg__panel {
    padding: 24px 22px 26px;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-fig--offset {
    margin-left: -40px;
    margin-right: 0;
  }

  .page-about .ab-hero__copy h1 {
    max-width: 20ch;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 36px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__link,
  .page-about .ab-fig .frame__tag,
  .page-about .ab-acc__chev,
  .page-about .ab-acc .acc__btn {
    transition: none;
  }
}
<<<END>>>