.page-about {
  --ab-paper-ink: #0B0E14;
  --ab-paper-dim: rgba(11, 14, 20, 0.72);
  --ab-paper-line: rgba(11, 14, 20, 0.16);
  --ab-teal-deep: #0F7A72;
}

.page-about section[id] {
  scroll-margin-top: 110px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(36px, 7vw, 88px) 0 clamp(24px, 3vw, 40px);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(30, 58, 99, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 99, 0.5) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: radial-gradient(120% 88% at 16% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 88% at 16% 0%, #000 0%, transparent 74%);
  pointer-events: none;
  z-index: 0;
}

.page-about .ab-hero > .wrap {
  position: relative;
  z-index: 1;
}

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

.page-about .ab-hero__grid {
  display: grid;
  gap: 34px;
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-size: clamp(48px, 13vw, 112px);
  line-height: 0.94;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text);
}

.page-about .ab-hero__text {
  margin: 24px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 0.5vw + 14px, 18px);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .ab-status {
  border-left: 2px solid var(--cyan);
  padding-left: 20px;
  display: grid;
  gap: 2px;
  align-content: start;
}

.page-about .ab-status__label {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-status__label:first-child {
  margin-top: 0;
}

.page-about .ab-status__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(18px, 1vw + 14px, 22px);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--gold);
}

.page-about .ab-toc {
  display: flex;
  gap: 8px;
  margin-top: clamp(30px, 5vw, 54px);
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .ab-toc::-webkit-scrollbar {
  display: none;
}

.page-about .ab-toc a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.22s var(--ease), background-color 0.22s var(--ease),
    border-color 0.22s var(--ease);
}

.page-about .ab-toc a:hover,
.page-about .ab-toc a:focus-visible {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 通用图形 ---------- */
.page-about .ab-figure {
  margin: 0;
}

.page-about .ab-figure__frame {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-800), var(--ink-700));
}

.page-about .ab-figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(92% 72% at 80% 0%, rgba(44, 229, 214, 0.13), transparent 72%);
  pointer-events: none;
}

.page-about .ab-figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-about .ab-figure__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 站点主张 ---------- */
.page-about .ab-claim__grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-claim__statement {
  margin: 0;
  font-size: clamp(21px, 3vw, 32px);
  line-height: 1.48;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .ab-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-rules li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-rules__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .ab-rules__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .ab-rules__text strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 编年 ---------- */
.page-about .ab-chronicle__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .ab-chronicle__note p {
  margin: 0 0 14px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .ab-chronicle__note p:last-child {
  margin-bottom: 0;
  color: var(--mist);
  font-size: 14px;
}

.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: clamp(34px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ab-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 20px;
  background: var(--paper);
  color: var(--ab-paper-ink);
  border: 2px solid var(--ab-paper-ink);
  border-radius: 4px;
  box-shadow: 0 16px 34px rgba(4, 10, 22, 0.48);
  transition: transform 0.34s var(--ease), box-shadow 0.34s var(--ease);
}

.page-about .ab-stage:nth-child(1) { transform: rotate(-0.7deg); }
.page-about .ab-stage:nth-child(2) { transform: rotate(0.5deg); }
.page-about .ab-stage:nth-child(3) { transform: rotate(-0.4deg); }
.page-about .ab-stage:nth-child(4) { transform: rotate(0.9deg); }

.page-about .ab-stage:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 22px 46px rgba(4, 10, 22, 0.6);
}

.page-about .ab-stage__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(11, 14, 20, 0.5);
}

.page-about .ab-stage__name {
  margin: 0;
  font-size: 24px;
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ab-paper-ink);
}

.page-about .ab-stage__copy {
  margin: 0;
  flex: 1 1 auto;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-paper-dim);
}

.page-about .ab-stage__assets {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--ab-paper-line);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .ab-stage__assets li {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border: 1px solid var(--ab-paper-line);
  border-radius: 3px;
  color: var(--ab-paper-dim);
  background: rgba(11, 14, 20, 0.04);
  opacity: 0.72;
  transition: opacity 0.25s var(--ease), border-color 0.25s var(--ease),
    color 0.25s var(--ease);
}

.page-about .ab-stage:hover .ab-stage__assets li {
  opacity: 1;
  border-color: rgba(15, 122, 114, 0.5);
  color: var(--ab-teal-deep);
}

/* ---------- 入口族 ---------- */
.page-about .ab-family__grid {
  display: grid;
  gap: 34px;
}

.page-about .ab-map {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .ab-map caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-map th {
  text-align: left;
  padding: 10px 16px 10px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .ab-map td {
  padding: 15px 16px 15px 0;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .ab-map tbody tr {
  transition: background-color 0.2s var(--ease);
}

.page-about .ab-map tbody tr:hover {
  background: rgba(44, 229, 214, 0.07);
}

.page-about .ab-map__name {
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}

.page-about .ab-family__side {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .ab-family__note {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-about .ab-team__copy p {
  margin: 0 0 16px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .ab-team__facts {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold) !important;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  margin-top: clamp(30px, 4vw, 48px);
}

.page-about .ab-stat {
  border-top: 2px solid var(--line);
  padding-top: 14px;
}

.page-about .ab-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 58px);
  line-height: 1;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.page-about .ab-stat__desc {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 服务范围 ---------- */
.page-about .ab-scope__grid {
  display: grid;
  gap: 18px;
}

.page-about .ab-tile {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--ink-800);
}

.page-about .ab-tile--gold {
  border-left-color: var(--gold);
}

.page-about .ab-tile__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .ab-tile--gold .ab-tile__label {
  color: var(--gold);
}

.page-about .ab-tile__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 收束 ---------- */
.page-about .ab-closing {
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-about .ab-closing__bar {
  display: grid;
  gap: 22px;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(16, 37, 68, 0.9), rgba(10, 23, 48, 0.9));
}

.page-about .ab-closing__text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.page-about .ab-closing__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-about .ab-closing__links a {
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-closing__links a:hover,
.page-about .ab-closing__links a:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .ab-scope__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .ab-chronicle__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 40px;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .ab-closing__bar {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 30px 32px;
  }
}

@media (max-width: 699px) {
  .page-about .ab-map thead {
    display: none;
  }

  .page-about .ab-map,
  .page-about .ab-map tbody,
  .page-about .ab-map tr,
  .page-about .ab-map td {
    display: block;
    width: 100%;
  }

  .page-about .ab-map tr {
    padding: 16px 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .page-about .ab-map td {
    padding: 0;
    border-bottom: 0;
  }

  .page-about .ab-map td + td {
    margin-top: 6px;
    font-size: 14px;
  }

  .page-about .ab-map__name {
    font-size: 17px;
    margin-bottom: 4px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .ab-claim__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-family__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    padding-top: 36px;
  }

  .page-about .ab-timeline::before {
    content: "";
    position: absolute;
    top: 8px;
    left: 6px;
    right: 6px;
    height: 1px;
    background: linear-gradient(to right, var(--line) 0%, var(--line) 82%, var(--cyan) 100%);
  }

  .page-about .ab-stage::after {
    content: "";
    position: absolute;
    top: -33px;
    left: 22px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--ink-900);
    border: 1px solid var(--cyan);
  }

  .page-about .ab-stage:nth-child(4)::after {
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(44, 229, 214, 0.16);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-stage,
  .page-about .ab-stage:hover {
    transform: none;
  }
}
<<<END>>>