.page-about{
  --ab-index-w:186px;
  --ab-shadow:9px 9px 0 rgba(10,14,34,.62);
  --ab-shadow-soft:9px 9px 0 rgba(139,92,255,.2);
  --ab-ink-soft:#3A2E24;
  --ab-ink-mute:rgba(27,20,16,.62);
}

.page-about .lr-container{
  padding-top:clamp(14px,2.4vw,26px);
}

/* ---------- 首屏框景 ---------- */
.page-about .ab-hero{
  padding:clamp(16px,2.6vw,30px) var(--lr-pad) 0;
}

.page-about .ab-hero__frame{
  position:relative;
  max-width:var(--lr-wrap);
  margin:0 auto;
  min-height:clamp(380px,54vw,540px);
  border:1px solid var(--lr-line);
  background:var(--lr-night);
  overflow:hidden;
  display:flex;
  align-items:flex-end;
}

.page-about .ab-hero__frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  box-shadow:
    inset 0 0 90px -22px rgba(53,230,255,.5),
    inset 0 0 0 1px rgba(139,92,255,.24);
}

.page-about .ab-hero__frame::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:12px;
  z-index:3;
  pointer-events:none;
  background:repeating-linear-gradient(90deg,var(--lr-cyan) 0 1px,transparent 1px 24px);
  opacity:.45;
}

.page-about .ab-hero__img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.42;
}

.page-about .ab-hero__scrim{
  position:absolute;
  inset:0;
  background:
    radial-gradient(120% 92% at 12% 100%, rgba(10,14,34,.98) 0%, rgba(10,14,34,.74) 44%, rgba(19,26,56,.28) 100%),
    linear-gradient(180deg, rgba(10,14,34,.86) 0%, rgba(10,14,34,.32) 56%, rgba(10,14,34,.92) 100%);
}

.page-about .ab-hero__content{
  position:relative;
  z-index:4;
  width:100%;
  max-width:880px;
  padding:clamp(26px,5vw,66px) clamp(20px,4.4vw,62px) clamp(34px,5vw,68px);
}

.page-about .ab-hero__content .lr-display{
  margin:14px 0 0;
  max-width:15em;
  font-size:clamp(30px,5.4vw,64px);
  line-height:1.14;
  letter-spacing:.04em;
}

.page-about .ab-hero__content .lr-lede{
  margin:18px 0 0;
  max-width:44em;
  font-size:clamp(14px,1.5vw,16.5px);
  line-height:1.75;
  color:var(--lr-mist);
}

.page-about .ab-hero__facts{
  list-style:none;
  margin:clamp(22px,3.4vw,34px) 0 0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px 18px;
  max-width:660px;
}

.page-about .ab-hero__facts li{
  border-top:2px solid var(--lr-line);
  padding-top:10px;
}

.page-about .ab-hero__facts-num{
  display:block;
  font-family:var(--lr-font-mono);
  font-size:clamp(22px,3vw,32px);
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--lr-cyan);
  text-shadow:var(--lr-glow);
}

.page-about .ab-hero__facts-label{
  display:block;
  margin-top:4px;
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.5;
  color:var(--lr-mist);
}

/* ---------- 主体骨架 ---------- */
.page-about .ab-layout{
  max-width:var(--lr-wrap);
  margin:0 auto;
  padding:clamp(30px,5.4vw,72px) var(--lr-pad) clamp(44px,7vw,104px);
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(26px,4.4vw,52px);
}

.page-about .ab-index{
  border-left:2px solid var(--lr-cyan);
  padding:2px 0 2px 14px;
}

.page-about .ab-index__title{
  margin:0 0 12px;
  font-family:var(--lr-font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--lr-mist);
  text-transform:uppercase;
}

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

.page-about .ab-index__link{
  display:flex;
  align-items:baseline;
  gap:8px;
  font-size:13px;
  line-height:1.45;
  color:var(--lr-mist);
  text-decoration:none;
  transition:color .2s ease;
}

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

.page-about .ab-index__link:hover .ab-index__num,
.page-about .ab-index__link:focus-visible .ab-index__num{
  color:var(--lr-pulse);
}

.page-about .ab-index__num{
  font-family:var(--lr-font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:rgba(154,166,200,.65);
  transition:color .2s ease;
}

.page-about .ab-body{
  display:grid;
  gap:clamp(24px,3.6vw,44px);
  min-width:0;
}

/* ---------- 章节容器 ---------- */
.page-about .ab-sec{
  position:relative;
  scroll-margin-top:128px;
}

.page-about .ab-sec--paper{
  background:var(--lr-paper);
  color:var(--lr-ink);
  border:2px solid var(--lr-ink);
  box-shadow:var(--ab-shadow);
  padding:clamp(22px,3.4vw,46px);
}

.page-about .ab-sec--paper::after{
  content:"";
  position:absolute;
  right:-2px;
  top:-2px;
  width:38px;
  height:38px;
  background:var(--lr-pulse);
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}

.page-about .ab-sec--dark{
  background:linear-gradient(155deg,var(--lr-night) 0%,var(--lr-abyss) 74%);
  border:1px solid var(--lr-line);
  box-shadow:var(--ab-shadow-soft);
  padding:clamp(22px,3.4vw,46px);
  color:var(--lr-white);
}

.page-about .ab-sec__head{
  display:flex;
  align-items:baseline;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:18px;
}

.page-about .ab-sec__num{
  font-family:var(--lr-font-mono);
  font-size:12px;
  line-height:1.2;
  letter-spacing:.18em;
  padding:2px 6px;
  border:1px solid currentColor;
}

.page-about .ab-sec--paper .ab-sec__num{ color:var(--lr-pulse); }
.page-about .ab-sec--dark .ab-sec__num{ color:var(--lr-cyan); }

.page-about .ab-sec--paper .lr-h2{
  margin:0;
  font-size:clamp(21px,3vw,30px);
  color:var(--lr-ink);
}

.page-about .ab-sec--dark .lr-h2{
  margin:0;
  font-size:clamp(21px,3vw,30px);
  color:var(--lr-white);
}

.page-about .ab-prose p{
  margin:0 0 14px;
  max-width:68ch;
  font-size:15px;
  line-height:1.78;
}

.page-about .ab-sec--paper .ab-prose p{ color:var(--ab-ink-soft); }
.page-about .ab-sec--dark .ab-prose p{ color:var(--lr-mist); }

.page-about .ab-prose p:last-child{ margin-bottom:0; }
.page-about .ab-prose--tight{ margin-top:18px; }
.page-about .ab-prose--tail{
  margin-top:20px;
  padding-top:16px;
  border-top:1px dashed var(--lr-line);
}

/* ---------- 01 使用场景 ---------- */
.page-about .ab-scenes{
  list-style:none;
  margin:22px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:18px;
}

.page-about .ab-scene{
  border-top:3px solid var(--lr-ink);
  padding-top:14px;
}

.page-about .ab-scene .lr-h3{
  margin:0 0 8px;
  font-size:16px;
  line-height:1.45;
  color:var(--lr-ink);
}

.page-about .ab-scene p{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--ab-ink-soft);
}

/* ---------- 02 数据分区 ---------- */
.page-about .ab-zones{
  list-style:none;
  margin:20px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:14px;
}

.page-about .ab-zone{
  position:relative;
  background:rgba(14,42,52,.42);
  border:1px solid var(--lr-line);
  border-left:3px solid var(--lr-cyan);
  padding:18px 18px 20px;
  transition:background .26s ease,transform .26s ease,border-color .26s ease;
}

.page-about .ab-zone:hover,
.page-about .ab-zone:focus-within{
  background:rgba(14,42,52,.74);
  border-left-color:var(--lr-violet);
  transform:translateX(4px);
}

.page-about .ab-zone__label{
  display:inline-block;
  margin-bottom:8px;
  font-family:var(--lr-font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--lr-cyan-soft);
}

.page-about .ab-zone h3{
  margin:0 0 10px;
  font-size:17px;
  letter-spacing:.02em;
  color:var(--lr-white);
}

.page-about .ab-zone p{
  margin:0 0 12px;
  font-size:14px;
  line-height:1.72;
  color:var(--lr-mist);
}

.page-about .ab-zone__use{
  display:block;
  padding-top:9px;
  border-top:1px dashed var(--lr-line);
  font-size:12.5px;
  line-height:1.65;
  color:var(--lr-cyan-soft);
}

/* ---------- 03 版本时间轴 ---------- */
.page-about .ab-timeline{
  list-style:none;
  margin:24px 0 0;
  padding:0;
  position:relative;
}

.page-about .ab-timeline::before{
  content:"";
  position:absolute;
  left:9px;
  top:8px;
  bottom:12px;
  width:3px;
  background:linear-gradient(180deg,var(--lr-pulse),var(--lr-violet));
}

.page-about .ab-timeline__item{
  position:relative;
  padding:0 0 26px 42px;
}

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

.page-about .ab-timeline__item::before{
  content:"";
  position:absolute;
  left:2px;
  top:4px;
  width:17px;
  height:17px;
  background:var(--lr-paper);
  border:3px solid var(--lr-pulse);
  transform:rotate(45deg);
}

.page-about .ab-timeline__gen{
  display:inline-block;
  margin-bottom:4px;
  font-family:var(--lr-font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--lr-pulse);
}

.page-about .ab-timeline__title{
  margin:0 0 6px;
  font-size:17px;
  color:var(--lr-ink);
}

.page-about .ab-timeline__desc{
  margin:0;
  max-width:62ch;
  font-size:14px;
  line-height:1.75;
  color:var(--ab-ink-soft);
}

.page-about .ab-timeline__tag{
  display:inline-block;
  margin-top:10px;
  padding:3px 9px;
  font-family:var(--lr-font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--lr-ink);
  background:rgba(139,92,255,.14);
  border:1px solid rgba(27,20,16,.35);
  transition:background .24s ease,border-color .24s ease;
}

.page-about .ab-timeline__item:hover .ab-timeline__tag{
  background:rgba(139,92,255,.28);
  border-color:var(--lr-violet);
}

/* ---------- 图片组件 ---------- */
.page-about .ab-figure{
  margin:26px 0 0;
}

.page-about .ab-figure img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  border:2px solid var(--lr-ink);
  background:var(--lr-night);
}

.page-about .ab-figure figcaption{
  margin-top:9px;
  font-size:12px;
  line-height:1.65;
  color:var(--ab-ink-mute);
}

/* ---------- 04 团队 ---------- */
.page-about .ab-roster{
  list-style:none;
  margin:22px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:20px;
}

.page-about .ab-roster__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:16px;
  align-items:start;
  border-top:3px solid var(--lr-ink);
  padding-top:14px;
}

.page-about .ab-roster__stat{
  font-family:var(--lr-font-mono);
  font-size:34px;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--lr-ink);
}

.page-about .ab-roster__stat small{
  display:block;
  margin-top:6px;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--ab-ink-mute);
}

.page-about .ab-roster__item h3{
  margin:0 0 6px;
  font-size:16px;
  color:var(--lr-ink);
}

.page-about .ab-roster__item p{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--ab-ink-soft);
}

/* ---------- 05 覆盖范围 ---------- */
.page-about .ab-reach__grid{
  list-style:none;
  margin:22px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:rgba(27,20,16,.22);
  border:1px solid rgba(27,20,16,.22);
}

.page-about .ab-reach__cell{
  background:var(--lr-paper);
  padding:15px 12px 17px;
}

.page-about .ab-reach__num{
  display:block;
  font-family:var(--lr-font-mono);
  font-size:clamp(20px,2.6vw,28px);
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--lr-ink);
}

.page-about .ab-reach__num small{
  font-size:.5em;
  letter-spacing:.02em;
  margin-left:2px;
}

.page-about .ab-reach__label{
  display:block;
  margin-top:7px;
  font-size:12px;
  line-height:1.55;
  color:var(--ab-ink-mute);
}

/* ---------- 06 安全与稳定 ---------- */
.page-about .ab-trust-list{
  list-style:none;
  margin:20px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:16px;
}

.page-about .ab-trust-list li{
  border-left:3px solid var(--lr-violet);
  padding:2px 0 2px 16px;
}

.page-about .ab-trust-list h3{
  margin:0 0 6px;
  font-size:15.5px;
  color:var(--lr-white);
}

.page-about .ab-trust-list p{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--lr-mist);
}

/* ---------- 07 下一步 ---------- */
.page-about .ab-next__grid{
  margin-top:22px;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:14px;
}

.page-about .ab-next__card{
  display:block;
  padding:20px 18px 22px;
  background:rgba(19,26,56,.72);
  border:1px solid var(--lr-line);
  color:var(--lr-white);
  text-decoration:none;
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}

.page-about .ab-next__card:hover,
.page-about .ab-next__card:focus-visible{
  transform:translateY(-4px);
  border-color:var(--lr-cyan);
  box-shadow:var(--lr-glow);
}

.page-about .ab-next__card strong{
  display:block;
  margin:10px 0 14px;
  font-size:17px;
  line-height:1.45;
  letter-spacing:.01em;
}

.page-about .ab-next__card-go{
  font-family:var(--lr-font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--lr-cyan);
}

.page-about .ab-next__foot{
  margin:20px 0 0;
  font-size:13.5px;
  line-height:1.75;
  color:var(--lr-mist);
}

.page-about .ab-next__foot a{
  color:var(--lr-cyan-soft);
  text-decoration:underline;
  text-underline-offset:3px;
}

.page-about .ab-next__foot a:hover,
.page-about .ab-next__foot a:focus-visible{
  color:var(--lr-white);
}

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

@media (min-width:760px){
  .page-about .ab-scenes{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .page-about .ab-zones{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .ab-roster{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .ab-reach__grid{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .ab-trust-list{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .ab-next__grid{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
}

/* ---------- 桌面：常驻索引栏 ---------- */
@media (min-width:1000px){
  .page-about .ab-layout{
    grid-template-columns:var(--ab-index-w) minmax(0,1fr);
    gap:clamp(30px,3.6vw,58px);
    align-items:start;
  }
  .page-about .ab-index{
    position:sticky;
    top:122px;
    align-self:start;
  }
  .page-about .ab-index__list{
    display:block;
  }
  .page-about .ab-index__list li + li{
    margin-top:11px;
  }
  .page-about .ab-hero__frame{
    min-height:540px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .ab-zone,
  .page-about .ab-next__card,
  .page-about .ab-index__link,
  .page-about .ab-index__num,
  .page-about .ab-timeline__tag{
    transition:none;
  }
  .page-about .ab-zone:hover,
  .page-about .ab-next__card:hover,
  .page-about .ab-next__card:focus-visible{
    transform:none;
  }
}
<<<END>>>