.page-about {
  --ab-rail-pad: 40px;
  --ab-rail-x: 15px;
  --ab-dot: 14px;
  --ab-gap: clamp(22px, 3.2vw, 46px);
  --ab-sec: clamp(38px, 5vw, 76px);
  overflow-wrap: break-word;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: clamp(26px, 4.4vw, 56px) 0 clamp(18px, 2.4vw, 30px);
  max-width: 60rem;
}

.page-about .ab-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .ab-hero .eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--coral);
}

.page-about .ab-hero .h-display {
  margin: 14px 0 20px;
  font-size: clamp(32px, 6.6vw, 68px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-hero .h-display .mark {
  background: linear-gradient(180deg, transparent 62%, var(--marker) 62%, var(--marker) 92%, transparent 92%);
  padding: 0 .06em;
}

.page-about .ab-hero .lede {
  max-width: 38em;
  font-size: clamp(16px, 1.45vw, 19px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-hero__key {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 24px;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-hero__key li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 15px 16px;
  background: var(--pearl);
}

.page-about .ab-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.4vw, 27px);
  font-weight: 700;
  color: var(--deep);
  letter-spacing: .02em;
  line-height: 1.15;
}

.page-about .ab-hero__lab {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ink-soft);
}

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

/* ---------- 首屏主图 ---------- */
.page-about .ab-heromap {
  margin: 6px 0 var(--ab-gap);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--mist);
  box-shadow: var(--sh-1);
}

.page-about .ab-heromap img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .ab-heromap .media__cap {
  display: block;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--pearl);
  border-top: 1px solid var(--line);
}

/* ---------- 通用章节间距 ---------- */
.page-about .ab-origin,
.page-about .ab-timeline,
.page-about .ab-team,
.page-about .ab-partners,
.page-about .ab-scale,
.page-about .ab-family,
.page-about .ab-awards,
.page-about .ab-next {
  padding-top: var(--ab-sec);
}

.page-about .ab-next {
  padding-bottom: clamp(46px, 6vw, 96px);
}

.page-about .section__head {
  max-width: 60rem;
  margin-bottom: clamp(20px, 2.6vw, 34px);
}

.page-about .section__head .lede {
  margin-top: 12px;
  max-width: 44em;
  color: var(--ink-soft);
}

/* ---------- 起点 ---------- */
.page-about .ab-rail {
  display: grid;
  gap: 16px;
}

.page-about .ab-rail__side {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .ab-rail__no {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--ocean);
}

.page-about .ab-rail__tag {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--coral);
}

.page-about .ab-rail__main .h-section {
  margin: 6px 0 16px;
}

.page-about .ab-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-points li {
  position: relative;
  padding: 14px 0 14px 26px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .ab-points li strong {
  color: var(--ink);
}

.page-about .ab-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--pearl);
  border: 2px solid var(--ocean);
}

/* ---------- 版本时间线 ---------- */
.page-about .ab-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .ab-nodes {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px var(--ab-rail-pad);
}

.page-about .ab-nodes::before {
  content: "";
  position: absolute;
  left: var(--ab-rail-x);
  top: 16px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--ocean) 0%, var(--ocean) 42%, var(--coral) 100%);
  opacity: .32;
}

.page-about .ab-node {
  position: relative;
  margin-bottom: 18px;
  scroll-margin-top: calc(var(--bar-h) + 18px);
}

.page-about .ab-node:last-child {
  margin-bottom: 0;
}

.page-about .ab-node__body {
  position: relative;
  padding: 22px 22px 22px;
  background: var(--pearl);
  border: 1px solid var(--line);
  border-radius: 4px var(--r-md) var(--r-md) var(--r-md);
  box-shadow: var(--sh-1);
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease), transform .22s var(--ease);
}

.page-about .ab-node:hover .ab-node__body,
.page-about .ab-node:focus-within .ab-node__body {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .ab-node:target .ab-node__body {
  border-color: var(--coral);
  box-shadow: 0 0 0 1px var(--coral), var(--sh-1);
}

.page-about .ab-node__dot {
  position: absolute;
  left: calc(var(--ab-rail-x) + 1px - var(--ab-rail-pad) - var(--ab-dot) / 2);
  top: 28px;
  width: var(--ab-dot);
  height: var(--ab-dot);
  border-radius: 50%;
  background: var(--pearl);
  border: 2px solid var(--ocean);
  box-shadow: 0 0 0 4px rgba(11, 111, 184, .1);
  transition: background .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
  animation: ab-pulse 3s var(--ease) infinite;
}

.page-about .ab-node:hover .ab-node__dot,
.page-about .ab-node:focus-within .ab-node__dot {
  background: var(--coral);
  border-color: var(--coral);
  box-shadow: 0 0 0 5px rgba(255, 107, 74, .16);
  transform: scale(1.18);
}

@keyframes ab-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(11, 111, 184, .1); }
  50% { box-shadow: 0 0 0 7px rgba(11, 111, 184, .04); }
}

.page-about .ab-node__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 12px;
}

.page-about .ab-node__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--deep);
  color: var(--pearl);
  font-size: 13px;
  letter-spacing: .08em;
  text-decoration: none;
  transition: background .2s var(--ease), transform .2s var(--ease);
}

.page-about .ab-node__no:hover,
.page-about .ab-node__no:focus-visible {
  background: var(--coral);
  color: var(--ink);
  transform: translateY(-1px);
}

.page-about .ab-node__year {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ink-soft);
}

.page-about .ab-node__body .h-card {
  margin: 0 0 10px;
  font-size: clamp(19px, 1.9vw, 23px);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .ab-node__body > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-node__pull {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  margin-top: 0;
  transition: grid-template-rows .34s var(--ease), opacity .28s var(--ease), margin-top .34s var(--ease);
}

.page-about .ab-node__pull > div {
  overflow: hidden;
}

.page-about .ab-node:hover .ab-node__pull,
.page-about .ab-node:focus-within .ab-node__pull {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: 14px;
}

.page-about .ab-node__cap {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--coral);
}

.page-about .ab-node__pull p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-roster {
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .ab-roster__row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-roster__k {
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 700;
  color: var(--ocean);
  letter-spacing: .02em;
  line-height: 1.1;
}

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

.page-about .ab-roster__v strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  color: var(--ink);
}

.page-about .ab-roster__v span {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .ab-team__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--mist);
  box-shadow: var(--sh-1);
}

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-team__media .media__cap {
  display: block;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--pearl);
  border-top: 1px solid var(--line);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-partner {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 28px;
  background: var(--pearl);
  transition: background .22s var(--ease);
}

.page-about .ab-partner:hover {
  background: linear-gradient(160deg, #ffffff 0%, var(--mist) 100%);
}

.page-about .ab-partner__no {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--palm);
}

.page-about .ab-partner .h-card {
  margin: 0;
  font-size: 19px;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .ab-partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .ab-partner .tag {
  align-self: flex-start;
  margin-top: 2px;
}

/* ---------- 规模 ---------- */
.page-about .ab-scale__nums {
  list-style: none;
  margin: 0 0 clamp(24px, 3vw, 40px);
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-scale__nums li {
  padding: 18px 16px;
  background: var(--pearl);
}

.page-about .ab-scale__n {
  display: block;
  font-size: clamp(21px, 2.5vw, 29px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--deep);
  line-height: 1.15;
}

.page-about .ab-scale__l {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--ink-soft);
}

.page-about .ab-scale__grid {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-scale__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--deep);
  box-shadow: var(--sh-1);
}

.page-about .ab-scale__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .ab-scale__media .media__cap {
  display: block;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--pearl);
  background: var(--deep);
}

.page-about .ab-scale__text .prose + .prose {
  margin-top: 14px;
}

.page-about .ab-scale__text .btn {
  margin-top: 20px;
}

/* ---------- 家庭与回访 ---------- */
.page-about .ab-family__grid {
  display: grid;
  gap: 16px;
}

.page-about .ab-family__card {
  position: relative;
  overflow: hidden;
  padding: 28px 24px 30px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, #ffffff 0%, var(--pearl) 62%);
  box-shadow: var(--sh-1);
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

.page-about .ab-family__card:hover {
  border-color: var(--coral);
  transform: translateY(-2px);
}

.page-about .ab-family__card::before {
  content: "";
  position: absolute;
  right: -34px;
  top: -34px;
  width: 128px;
  height: 128px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 74, .16), transparent 68%);
  pointer-events: none;
}

.page-about .ab-family__no {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--coral);
}

.page-about .ab-family__card .h-card {
  margin: 0 0 10px;
  font-size: clamp(19px, 1.9vw, 22px);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .ab-family__card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-family__tail {
  margin: 24px 0 0;
  max-width: 46em;
  padding-left: 18px;
  border-left: 3px solid var(--marker);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-family__tail a {
  color: var(--ocean);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color .2s var(--ease);
}

.page-about .ab-family__tail a:hover,
.page-about .ab-family__tail a:focus-visible {
  color: var(--coral);
}

/* ---------- 荣誉 ---------- */
.page-about .ab-awards__band {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 3.4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(180deg, rgba(11, 111, 184, .07), rgba(11, 111, 184, 0) 72%),
    var(--mist);
}

.page-about .ab-awards__band::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: repeating-linear-gradient(90deg, var(--ocean) 0 14px, transparent 14px 30px);
  opacity: .3;
}

.page-about .ab-awards__band .section__head {
  margin-bottom: 20px;
}

.page-about .ab-awards__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .ab-awards__list li {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.page-about .ab-awards__y {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ocean);
}

.page-about .ab-awards__list strong {
  font-size: 16px;
  color: var(--ink);
}

.page-about .ab-awards__d {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .ab-awards__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 展望 ---------- */
.page-about .ab-next__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 3.8vw, 56px);
  border-radius: var(--r-lg);
  background: linear-gradient(148deg, var(--deep-900) 0%, var(--deep) 44%, var(--ocean) 100%);
  color: var(--pearl);
}

.page-about .ab-next__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, .18) 1px, transparent 0);
  background-size: 22px 22px;
  opacity: .55;
  pointer-events: none;
}

.page-about .ab-next__panel > * {
  position: relative;
  z-index: 1;
}

.page-about .ab-next__panel .eyebrow {
  color: var(--marker);
}

.page-about .ab-next__panel .h-section {
  margin: 8px 0 16px;
  color: var(--pearl);
  font-size: clamp(24px, 3.2vw, 36px);
}

.page-about .ab-next__panel .prose {
  max-width: 44em;
  color: rgba(251, 247, 242, .88);
}

.page-about .ab-next__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

  .page-about .ab-rail {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 0 28px;
    align-items: start;
  }

  .page-about .ab-rail__side {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-top: 8px;
    border-right: 1px solid var(--line);
  }

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

  .page-about .ab-awards__list li {
    grid-template-columns: 200px minmax(0, 1fr) minmax(0, 1.25fr);
    gap: 6px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-timeline .section__head {
    max-width: 52rem;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
  }

  .page-about .ab-scale__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }

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

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

@media (min-width: 1180px) {
  .page-about .ab-scale__nums {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about {
    --ab-rail-pad: 54px;
    --ab-rail-x: 20px;
    --ab-dot: 16px;
  }
}

@media (max-width: 560px) {
  .page-about {
    --ab-rail-pad: 30px;
    --ab-rail-x: 9px;
    --ab-dot: 12px;
  }

  .page-about .ab-node__body {
    padding: 18px 16px 18px;
  }

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

  .page-about .ab-roster__row {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .ab-legend {
    gap: 6px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-node__dot {
    animation: none;
  }

  .page-about .ab-node__pull {
    transition: none;
  }

  .page-about .ab-node__body,
  .page-about .ab-family__card,
  .page-about .ab-partner {
    transition: none;
  }
}