.page-about{
  --ab-rail-w: 120px;
  --ab-block: clamp(56px, 9vw, 128px);
  --ab-gap: clamp(24px, 4vw, 56px);
  background: var(--ink);
  color: var(--chalk);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
}
.page-about *,
.page-about *::before,
.page-about *::after{ box-sizing: border-box; }
.page-about p{ margin: 0 0 1em; }
.page-about p:last-child{ margin-bottom: 0; }

.page-about .ab-link{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63,224,206,.36);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.page-about .ab-link:hover{
  color: var(--gold);
  border-bottom-color: rgba(240,190,106,.6);
}

.page-about .ab-h2{
  margin: 0 0 .55em;
  font-size: clamp(1.55rem, 3.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.24;
  color: var(--chalk);
}

.page-about .sk-eyebrow{
  display: block;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-lede{
  max-width: 46em;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
}

/* ---------- hero ---------- */
.page-about .ab-hero{
  position: relative;
  padding: calc(var(--header-h) + 52px) 0 clamp(48px, 8vw, 96px);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(63,224,206,.12), transparent 62%),
    linear-gradient(180deg, #0A1524 0%, #0C1B2D 62%, #0A1524 100%);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .ab-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(93,120,145,.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(93,120,145,.10) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.85), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,.85), transparent 88%);
  pointer-events: none;
}
.page-about .ab-hero > .sk-wrap{
  position: relative;
  z-index: 1;
}
.page-about .ab-hero .sk-breadcrumb{
  margin-bottom: clamp(26px, 4vw, 44px);
  font-size: 13px;
  color: var(--mist);
}
.page-about .ab-hero__grid{
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}
.page-about .ab-hero__title{
  margin: 0 0 .42em;
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.03em;
  color: var(--chalk);
}
.page-about .ab-hero__text{
  max-width: 34em;
  color: var(--chalk);
  font-size: clamp(15px, 1.7vw, 17px);
  opacity: .92;
}
.page-about .ab-hero__text--sub{
  color: var(--mist);
  font-size: clamp(14px, 1.5vw, 16px);
  opacity: 1;
}
.page-about .ab-hero__card{
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--lift);
}
.page-about .ab-hero__card::before{
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 72px;
  height: 2px;
  background: var(--gold);
  box-shadow: 0 0 12px rgba(240,190,106,.5);
}
.page-about .ab-hero__card-label{
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
}
.page-about .ab-facts{
  margin: 0;
  display: grid;
  gap: 0;
}
.page-about .ab-facts__row{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .ab-facts__row:first-child{ border-top: 0; }
.page-about .ab-facts dt{
  color: var(--mist);
  font-size: 13px;
  flex: 0 0 auto;
}
.page-about .ab-facts dd{
  margin: 0;
  font-size: 15px;
  color: var(--chalk);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.page-about .ab-facts dd.sk-mono{
  font-family: var(--font-mono);
  color: var(--cyan);
}

/* ---------- 通用分栏 ---------- */
.page-about .ab-section{
  position: relative;
  padding: var(--ab-block) 0;
}
.page-about .ab-section::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 20%, transparent 80%);
}
.page-about .ab-split{
  display: grid;
  gap: var(--ab-gap);
}
.page-about .ab-figure{
  margin: 0;
}
.page-about .ab-figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--panel);
}
.page-about .ab-figure__cap{
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  letter-spacing: .02em;
}

/* ---------- 主张 ---------- */
.page-about .ab-claim__text p{
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 16.5px);
}
.page-about .ab-claim__text p:first-of-type{ color: var(--chalk); }
.page-about .ab-pillars{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}
.page-about .ab-pillars__item{
  position: relative;
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--ink);
  transition: background .22s var(--ease);
}
.page-about .ab-pillars__item:hover{ background: var(--panel); }
.page-about .ab-pillars__mark{
  display: inline-block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gold);
}
.page-about .ab-pillars__title{
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--chalk);
}
.page-about .ab-pillars__item p{
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline__lede{ margin-bottom: clamp(28px, 4vw, 44px); }
.page-about .ab-timeline .ab-figure{ margin-bottom: clamp(32px, 5vw, 56px); }
.page-about .ab-timeline__body{ display: block; }

.page-about .ab-rail-m{
  margin-bottom: 28px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.page-about .ab-rail-m summary{
  padding: 12px 16px;
  cursor: pointer;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
  list-style: none;
}
.page-about .ab-rail-m summary::-webkit-details-marker{ display: none; }
.page-about .ab-rail-m summary::after{
  content: "+";
  float: right;
  font-family: var(--font-mono);
  color: var(--cyan);
}
.page-about .ab-rail-m[open] summary::after{ content: "−"; }
.page-about .ab-rail-m ol{
  margin: 0;
  padding: 4px 16px 16px;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .ab-rail-m a{
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .ab-rail-m a:hover{
  color: var(--gold);
  border-color: rgba(240,190,106,.5);
}

.page-about .ab-rail{ display: none; }

.page-about .ab-mark{
  position: relative;
  margin: 0 0 clamp(36px, 6vw, 68px);
  padding-left: 22px;
  border-left: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 32px);
  transition: border-color .22s var(--ease);
}
.page-about .ab-mark:last-child{ margin-bottom: 0; }
.page-about .ab-mark::before{
  content: "";
  position: absolute;
  left: -3px;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--cyan);
  transform: rotate(45deg);
  transition: background .22s var(--ease), box-shadow .22s var(--ease);
}
.page-about .ab-mark--key::before{
  background: var(--gold);
  box-shadow: 0 0 12px rgba(240,190,106,.7);
}
.page-about .ab-mark:hover{ border-left-color: rgba(63,224,206,.5); }
.page-about .ab-mark__head{
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.page-about .ab-mark__ver{
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--grid);
}
.page-about .ab-mark__title{
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 2.1vw, 1.32rem);
  font-weight: 800;
  letter-spacing: -.012em;
  line-height: 1.4;
  color: var(--chalk);
}
.page-about .ab-mark__text{
  margin: 0;
  max-width: 44em;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .ab-crew__intro{
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 16.5px);
  margin-bottom: clamp(22px, 3vw, 32px);
}
.page-about .ab-crew__stack{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
}
.page-about .ab-crew__item{
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(255,255,255,.06), 0 10px 26px rgba(0,0,0,.32);
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.page-about .ab-crew__item + .ab-crew__item{ margin-top: -1px; }
.page-about .ab-crew__item:hover{
  transform: translateY(-4px);
  border-color: rgba(63,224,206,.45);
  box-shadow: 0 1px 0 rgba(255,255,255,.08), 0 18px 40px rgba(0,0,0,.46);
  z-index: 2;
}
.page-about .ab-crew__num{
  display: block;
  font-size: clamp(24px, 3.6vw, 32px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: -.02em;
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}
.page-about .ab-crew__name{
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--chalk);
}
.page-about .ab-crew__item p{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .ab-figure--tall img{
  max-height: 620px;
}

/* ---------- 运营节奏 ---------- */
.page-about .ab-rhythm__lede{ margin-bottom: clamp(24px, 4vw, 40px); }
.page-about .ab-rhythm__list{ display: grid; }
.page-about .ab-rhythm__row{
  display: grid;
  gap: 10px 26px;
  padding: clamp(20px, 3vw, 30px) 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .ab-rhythm__row:last-child{ border-bottom: 1px solid var(--line-soft); }
.page-about .ab-rhythm__when{
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.page-about .ab-rhythm__when .sk-mono{
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}
.page-about .ab-rhythm__label{
  font-size: 14px;
  color: var(--mist);
}
.page-about .ab-rhythm__name{
  margin: 0 0 6px;
  font-size: clamp(1rem, 1.9vw, 1.18rem);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--chalk);
}
.page-about .ab-rhythm__what p{
  margin: 0;
  max-width: 46em;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}
.page-about .ab-rhythm__foot{
  margin-top: clamp(20px, 3vw, 30px);
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 覆盖 ---------- */
.page-about .ab-reach .ab-h2{ margin-bottom: clamp(22px, 3vw, 34px); }
.page-about .ab-reach__text{
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 16.5px);
  margin-bottom: clamp(20px, 3vw, 28px);
}
.page-about .ab-stats{
  margin: 0 0 clamp(22px, 3vw, 30px);
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}
.page-about .ab-stats__cell{
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  background: var(--ink);
}
.page-about .ab-stats__num{
  font-size: clamp(20px, 2.8vw, 26px);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.page-about .ab-stats__key{
  font-size: 12.5px;
  color: var(--mist);
  line-height: 1.5;
}
.page-about .ab-reach__sub{
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--chalk);
}
.page-about .ab-tags{
  margin: 0 0 clamp(18px, 3vw, 26px);
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .ab-reach__note{
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 合规 ---------- */
.page-about .ab-legal__links{
  margin-top: 20px;
  font-size: 14px;
  color: var(--mist);
}
.page-about .ab-legal__dot{
  margin: 0 10px;
  color: var(--grid);
}
.page-about .ab-legal__card{
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--lift);
}
.page-about .ab-legal__card::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), transparent 80%);
}
.page-about .ab-legal__card-label{
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .ab-next__panel{
  position: relative;
  padding: clamp(26px, 4.4vw, 52px);
  border: 1px solid rgba(240,190,106,.34);
  background:
    linear-gradient(135deg, rgba(240,190,106,.07), transparent 58%),
    var(--panel);
  box-shadow: var(--lift);
}
.page-about .ab-next__panel::after{
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 34px 34px 0;
  border-color: transparent var(--ink) transparent transparent;
}
.page-about .ab-next__title{ max-width: 20em; }
.page-about .ab-next__text{
  max-width: 46em;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 16.5px);
  margin-bottom: clamp(20px, 3vw, 30px);
}
.page-about .ab-next__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px){
  .page-about .ab-crew__item:nth-child(1){ margin-right: 30px; }
  .page-about .ab-crew__item:nth-child(2){ margin-left: 15px; margin-right: 15px; }
  .page-about .ab-crew__item:nth-child(3){ margin-left: 30px; }
  .page-about .ab-stats{ grid-template-columns: repeat(4, minmax(0,1fr)); }
}

@media (min-width: 900px){
  .page-about .ab-hero__grid{
    grid-template-columns: minmax(0,1.55fr) minmax(0,.85fr);
    align-items: end;
  }
  .page-about .ab-split--7-5{ grid-template-columns: minmax(0,1.4fr) minmax(0,.72fr); }
  .page-about .ab-split--text-figure{ grid-template-columns: minmax(0,1.15fr) minmax(0,.62fr); align-items: start; }
  .page-about .ab-split--figure-text{ grid-template-columns: minmax(0,.92fr) minmax(0,1fr); align-items: start; }
  .page-about .ab-rhythm__row{ grid-template-columns: 190px minmax(0,1fr); align-items: start; }
  .page-about .ab-rhythm__when{ flex-direction: column; gap: 4px; }
  .page-about .ab-stats{ grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (min-width: 980px){
  .page-about .ab-rail-m{ display: none; }
  .page-about .ab-rail{
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }
  .page-about .ab-timeline__body{
    display: grid;
    grid-template-columns: var(--ab-rail-w) minmax(0,1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }
  .page-about .ab-rail ol{
    margin: 0;
    padding: 0 0 0 18px;
    list-style: none;
    border-left: 1px solid var(--line);
    display: grid;
    gap: 14px;
  }
  .page-about .ab-rail a{
    position: relative;
    display: block;
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: .06em;
    color: var(--mist);
    text-decoration: none;
    transition: color .2s var(--ease);
  }
  .page-about .ab-rail a::before{
    content: "";
    position: absolute;
    left: -23px;
    top: .62em;
    width: 9px;
    height: 1px;
    background: var(--grid);
    transition: width .2s var(--ease), background .2s var(--ease);
  }
  .page-about .ab-rail a:hover{ color: var(--gold); }
  .page-about .ab-rail a:hover::before{
    width: 15px;
    background: var(--gold);
    box-shadow: 0 0 10px rgba(240,190,106,.6);
  }
  .page-about .ab-mark{ padding-left: 28px; }
}

@media (min-width: 1200px){
  .page-about .ab-hero__title{ max-width: 14em; }
}

@media (prefers-reduced-motion: reduce){
  .page-about .ab-crew__item:hover{ transform: none; }
  .page-about .ab-crew__item,
  .page-about .ab-pillars__item,
  .page-about .ab-mark,
  .page-about .ab-link{
    transition-property: opacity, background-color, border-color, color;
  }
}
<<<END>>>