.page-about{
  --abo-rule:1px solid rgba(16,21,19,.12);
  --abo-card:#FFFDF7;
  --abo-ink-soft:#20302b;
  display:block;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  padding:10px 0 34px;
}

.page-about .about-hero__title{
  margin:14px 0 16px;
  max-width:20ch;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:clamp(30px,6vw,58px);
  line-height:1.04;
  letter-spacing:.005em;
}

.page-about .about-hero__lead{
  max-width:62ch;
  color:var(--su-mist);
}

.page-about .about-hero__facts{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:26px 0 0;
  padding:0;
  list-style:none;
}

.page-about .about-fact{
  flex:1 1 148px;
  min-width:0;
  padding:10px 14px;
  border:1px solid rgba(143,168,156,.26);
  border-left:2px solid var(--su-lime);
  border-radius:var(--su-radius);
  background:rgba(15,59,50,.55);
}

.page-about .about-fact__k{
  display:block;
  font-family:var(--su-font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--su-mist);
}

.page-about .about-fact__v{
  display:block;
  margin-top:4px;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:22px;
  line-height:1.1;
  color:var(--su-white);
  overflow-wrap:anywhere;
}

/* ---------- 主体：目录 + 纸面 ---------- */
.page-about .about-body{
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
  padding-bottom:72px;
}

.page-about .about-index{
  border-top:1px solid rgba(143,168,156,.24);
  padding-top:16px;
}

.page-about .about-index__label{
  margin:0 0 10px;
  font-family:var(--su-font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--su-lime);
}

.page-about .about-index__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
}

.page-about .about-index__link{
  display:flex;
  gap:10px;
  align-items:baseline;
  padding:9px 10px;
  border-left:2px solid transparent;
  border-radius:0 var(--su-radius) var(--su-radius) 0;
  font-size:14px;
  line-height:1.45;
  color:var(--su-mist);
  text-decoration:none;
  transition:color .2s var(--su-ease),border-color .2s var(--su-ease),background-color .2s var(--su-ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible{
  color:var(--su-white);
  border-left-color:var(--su-lime);
  background:rgba(199,255,63,.07);
}

.page-about .about-index__link:focus-visible{
  outline:2px solid var(--su-ember);
  outline-offset:2px;
}

.page-about .about-index__num{
  font-family:var(--su-font-mono);
  font-size:11px;
  color:var(--su-lime);
  letter-spacing:.06em;
}

.page-about .about-index__note{
  margin:16px 0 0;
  padding-top:14px;
  border-top:1px solid rgba(143,168,156,.2);
  font-size:13px;
  line-height:1.65;
  color:var(--su-mist);
}

/* ---------- 暖纸内容层 ---------- */
.page-about .about-paper{
  min-width:0;
  padding:22px 18px 30px;
  border-radius:var(--su-radius);
  background:var(--su-paper);
  color:var(--su-coal);
  box-shadow:0 26px 64px rgba(5,8,7,.5);
}

.page-about .about-sec{
  padding-top:26px;
}

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

.page-about .about-sec + .about-sec{
  margin-top:26px;
  border-top:var(--abo-rule);
}

.page-about .about-sec__head{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:baseline;
  margin-bottom:14px;
}

.page-about .about-sec__num{
  font-family:var(--su-font-mono);
  font-size:12px;
  letter-spacing:.06em;
  padding:2px 7px;
  border:1px solid rgba(16,21,19,.16);
  border-radius:2px;
  background:var(--su-lime-soft);
  color:var(--su-teal);
}

.page-about .about-sec__title{
  margin:0;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:clamp(21px,3.4vw,29px);
  line-height:1.16;
  color:var(--su-coal);
}

.page-about .about-paper p{
  margin:0 0 14px;
  max-width:64ch;
  font-size:16px;
  line-height:1.74;
  color:var(--abo-ink-soft);
}

.page-about .about-paper p:last-child{
  margin-bottom:0;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin{
  display:grid;
  grid-template-columns:1fr;
  gap:18px;
}

.page-about .about-origin__figure{
  margin:0;
}

/* ---------- 02 团队 ---------- */
.page-about .about-team{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  margin:18px 0 18px;
}

.page-about .about-team__card{
  padding:15px 16px 17px;
  border:1px solid rgba(16,21,19,.14);
  border-top:3px solid var(--su-teal);
  border-radius:var(--su-radius);
  background:var(--abo-card);
  transition:transform .25s var(--su-ease),box-shadow .25s var(--su-ease),border-top-color .25s var(--su-ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-visible{
  transform:translateY(-3px);
  border-top-color:var(--su-lime);
  box-shadow:0 16px 30px rgba(10,31,26,.16);
}

.page-about .about-team__card:focus-visible{
  outline:2px solid var(--su-ember);
  outline-offset:3px;
}

.page-about .about-team__role{
  margin:0;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:19px;
  line-height:1.2;
  color:var(--su-coal);
}

.page-about .about-team__count{
  margin:4px 0 10px;
  font-family:var(--su-font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--su-teal);
}

.page-about .about-team__desc{
  margin:0;
  font-size:14.5px;
  line-height:1.7;
  color:var(--abo-ink-soft);
}

.page-about .about-team__figure{
  margin:6px 0 0;
}

/* ---------- 03 时间轴深色层 ---------- */
.page-about .about-timeline{
  margin-top:6px;
  padding:20px 16px 24px;
  border-radius:var(--su-radius);
  background:linear-gradient(158deg,#0A1F1A 0%,#0F3B32 100%);
  color:var(--su-white);
  box-shadow:0 18px 40px rgba(10,31,26,.3);
}

.page-about .about-timeline__figure{
  margin:0 0 22px;
}

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

.page-about .about-tl__item{
  position:relative;
  padding:0 0 20px 24px;
  border-left:1px solid rgba(143,168,156,.38);
}

.page-about .about-tl__item:last-child{
  padding-bottom:0;
  border-left-color:transparent;
}

.page-about .about-tl__item::before{
  content:"";
  position:absolute;
  left:-5px;
  top:8px;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--su-lime);
  box-shadow:0 0 0 3px rgba(199,255,63,.18);
  transition:box-shadow .25s var(--su-ease);
}

.page-about .about-tl__item:hover::before{
  box-shadow:0 0 0 6px rgba(199,255,63,.24);
}

.page-about .about-tl__year{
  display:block;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:26px;
  line-height:1;
  letter-spacing:.04em;
  color:var(--su-lime);
}

.page-about .about-tl__title{
  margin:6px 0 5px;
  font-family:var(--su-font-display);
  font-weight:700;
  font-size:17px;
  line-height:1.3;
  color:var(--su-white);
}

.page-about .about-tl__note{
  margin:0;
  max-width:56ch;
  font-size:14px;
  line-height:1.7;
  color:#CBD9CE;
}

/* ---------- 04 覆盖 ---------- */
.page-about .about-cov{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
  margin-bottom:18px;
}

.page-about .about-cov__cell{
  padding:13px 14px;
  border:1px solid rgba(16,21,19,.13);
  border-radius:var(--su-radius);
  background:var(--abo-card);
}

.page-about .about-cov__num{
  display:block;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:clamp(24px,4.4vw,34px);
  line-height:1.05;
  color:var(--su-teal);
}

.page-about .about-cov__label{
  display:block;
  margin-top:5px;
  font-family:var(--su-font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  line-height:1.5;
  color:#4A5F56;
}

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

.page-about .about-chip{
  padding:5px 11px;
  border:1px solid rgba(16,21,19,.16);
  border-radius:999px;
  background:var(--su-lime-soft);
  font-family:var(--su-font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--su-teal);
}

/* ---------- 05 荣誉与保障 ---------- */
.page-about .about-trust{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}

.page-about .about-honor{
  padding:16px 16px 18px;
  border:1px solid rgba(16,21,19,.14);
  border-left:3px solid var(--su-ember);
  border-radius:var(--su-radius);
  background:var(--abo-card);
  transition:box-shadow .25s var(--su-ease),transform .25s var(--su-ease);
}

.page-about .about-honor:hover,
.page-about .about-honor:focus-visible{
  transform:translateY(-2px);
  box-shadow:0 16px 32px rgba(10,31,26,.16);
}

.page-about .about-honor:focus-visible{
  outline:2px solid var(--su-ember);
  outline-offset:3px;
}

.page-about .about-honor__tag{
  margin:0 0 10px;
}

.page-about .about-honor__year{
  margin:0;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:30px;
  line-height:1;
  letter-spacing:.04em;
  color:var(--su-coal);
}

.page-about .about-honor__title{
  margin:8px 0 8px;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:19px;
  line-height:1.25;
  color:var(--su-coal);
}

.page-about .about-honor__desc{
  margin:0;
  font-size:14.5px;
  line-height:1.7;
  color:var(--abo-ink-soft);
}

.page-about .about-guard{
  padding:16px 16px 18px;
  border-radius:var(--su-radius);
  background:#101513;
  color:var(--su-white);
}

.page-about .about-guard__title{
  margin:0 0 12px;
  font-family:var(--su-font-display);
  font-weight:800;
  font-size:18px;
  line-height:1.25;
  color:var(--su-white);
}

.page-about .about-guard__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:9px;
}

.page-about .about-guard__list li{
  display:flex;
  flex-wrap:wrap;
  gap:4px 12px;
  align-items:baseline;
  padding-bottom:9px;
  border-bottom:1px solid rgba(143,168,156,.18);
}

.page-about .about-guard__list li:last-child{
  padding-bottom:0;
  border-bottom:0;
}

.page-about .about-guard__k{
  flex:0 0 auto;
  min-width:86px;
  font-family:var(--su-font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--su-lime);
}

.page-about .about-guard__v{
  flex:1 1 140px;
  min-width:0;
  font-size:14px;
  line-height:1.6;
  color:#D6E1D9;
}

/* ---------- 06 入口 ---------- */
.page-about .about-doors{
  display:grid;
  grid-template-columns:1fr;
  gap:8px;
  margin:18px 0;
}

.page-about .about-door{
  display:flex;
  flex-wrap:wrap;
  gap:4px 14px;
  align-items:baseline;
  padding:12px 14px;
  border:1px solid rgba(16,21,19,.14);
  border-left:3px solid var(--su-teal);
  border-radius:var(--su-radius);
  background:var(--abo-card);
  text-decoration:none;
  transition:border-color .2s var(--su-ease),transform .2s var(--su-ease),background-color .2s var(--su-ease);
}

.page-about .about-door:hover,
.page-about .about-door:focus-visible{
  transform:translateX(3px);
  border-left-color:var(--su-lime);
  background:#FFFFFF;
}

.page-about .about-door:focus-visible{
  outline:2px solid var(--su-ember);
  outline-offset:2px;
}

.page-about .about-door__k{
  flex:0 0 auto;
  font-family:var(--su-font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--su-teal);
}

.page-about .about-door__v{
  flex:1 1 180px;
  min-width:0;
  font-size:14.5px;
  line-height:1.6;
  color:var(--abo-ink-soft);
}

.page-about .about-tail{
  margin-top:4px;
  padding-top:14px;
  border-top:var(--abo-rule);
  font-size:14.5px;
  color:#3D5148;
}

/* ---------- 响应式 ---------- */
@media (min-width:620px){
  .page-about .about-paper{
    padding:30px 28px 38px;
  }

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

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

  .page-about .about-timeline{
    padding:26px 24px 30px;
  }
}

@media (min-width:760px){
  .page-about .about-origin{
    grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
    gap:24px;
    align-items:start;
  }

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

  .page-about .about-trust{
    grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
    align-items:start;
  }
}

@media (min-width:960px){
  .page-about .about-body{
    grid-template-columns:196px minmax(0,1fr);
    gap:42px;
    align-items:start;
  }

  .page-about .about-index{
    position:sticky;
    top:88px;
    align-self:start;
    max-height:calc(100vh - 120px);
    overflow-y:auto;
    padding-top:18px;
  }

  .page-about .about-paper{
    padding:40px 44px 52px;
  }

  .page-about .about-sec + .about-sec{
    margin-top:34px;
    padding-top:34px;
  }

  .page-about .about-hero__title{
    max-width:24ch;
  }

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

@media (prefers-reduced-motion:reduce){
  .page-about .about-team__card,
  .page-about .about-honor,
  .page-about .about-door,
  .page-about .about-index__link{
    transition:none;
  }

  .page-about .about-team__card:hover,
  .page-about .about-honor:hover,
  .page-about .about-door:hover,
  .page-about .about-team__card:focus-visible,
  .page-about .about-honor:focus-visible,
  .page-about .about-door:focus-visible{
    transform:none;
  }
}
<<<END>>>