.page-about{
  --about-rail:128px;
  --about-line:var(--line);
  background:var(--paper);
  color:var(--ink-text);
  overflow-x:clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  isolation:isolate;
  background:var(--ink);
  color:var(--paper);
  padding:clamp(56px,9vw,104px) 0 clamp(48px,7vw,88px);
  overflow:hidden;
}
.page-about .about-hero::before{
  content:"";
  position:absolute;
  z-index:-1;
  right:-25%;
  top:-25%;
  width:85%;
  height:150%;
  background:linear-gradient(165deg,rgba(47,107,255,.55),rgba(47,107,255,0) 58%,rgba(255,122,61,.4));
  transform:rotate(9deg);
  pointer-events:none;
}
.page-about .about-hero .breadcrumb__list{
  color:#93A1BD;
}
.page-about .about-hero .breadcrumb__link{
  color:#C9D2E6;
  text-decoration:none;
  border-bottom:1px solid rgba(201,206,216,.4);
}
.page-about .about-hero .breadcrumb__link:hover,
.page-about .about-hero .breadcrumb__link:focus-visible{
  color:var(--paper);
  border-bottom-color:var(--orange);
}
.page-about .about-hero .breadcrumb__current{
  color:var(--paper);
}
.page-about .about-hero__grid{
  display:grid;
  gap:clamp(32px,6vw,56px);
  margin-top:clamp(28px,5vw,48px);
}
.page-about .about-hero .eyebrow{
  color:var(--orange);
  font-family:var(--font-mono);
  letter-spacing:.18em;
  margin:0;
}
.page-about .about-hero__title{
  margin:14px 0 0;
  font-weight:900;
  font-size:clamp(38px,8.4vw,86px);
  line-height:.98;
  letter-spacing:.01em;
}
.page-about .about-hero__mark{
  display:block;
  font-family:var(--font-mono);
  font-size:.34em;
  letter-spacing:.42em;
  font-weight:600;
  color:var(--orange);
  margin-bottom:.5em;
}
.page-about .about-hero__lede{
  margin:24px 0 0;
  max-width:56ch;
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.75;
  color:#C9D2E6;
}
.page-about .about-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:32px;
}
.page-about .about-facts{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
  border-top:1px solid rgba(245,243,238,.25);
  padding-top:18px;
}
.page-about .about-facts li{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding-bottom:10px;
  border-bottom:1px dashed rgba(245,243,238,.18);
}
.page-about .about-facts b{
  font-family:var(--font-mono);
  font-size:24px;
  font-weight:600;
  color:var(--paper);
  order:2;
}
.page-about .about-facts span{
  font-size:13px;
  color:#93A1BD;
  letter-spacing:.06em;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter{
  padding:clamp(48px,7vw,96px) 0;
  border-top:1px solid var(--line);
}
.page-about .about-chapter--dark{
  background:var(--ink);
  color:var(--paper);
  border-top-color:rgba(245,243,238,.14);
}
.page-about .about-chapter--soft{
  background:var(--paper-soft);
}
.page-about .about-chapter__inner{
  display:grid;
  gap:22px;
}
.page-about .about-chapter__rail{
  display:flex;
  align-items:center;
  gap:14px;
}
.page-about .about-num{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(34px,6vw,60px);
  line-height:1;
  letter-spacing:-.04em;
  color:var(--blue);
}
.page-about .about-chapter--dark .about-num{
  color:var(--orange);
}
.page-about .about-chapter__rail .annotation{
  color:var(--grey-blue);
  font-weight:600;
  letter-spacing:.16em;
}
.page-about .about-chapter--dark .about-chapter__rail .annotation{
  color:rgba(245,243,238,.6);
}
.page-about .about-chapter__body{
  max-width:68ch;
  min-width:0;
}
.page-about .about-chapter--wide .about-chapter__body{
  max-width:none;
}
.page-about .about-chapter__body .section-title{
  margin:0 0 20px;
  font-weight:800;
  letter-spacing:.01em;
}
.page-about .about-chapter__body .prose{
  margin:0 0 16px;
}
.page-about .about-chapter--dark .about-chapter__body .prose{
  color:#C9D2E6;
}
.page-about .about-h3{
  margin:0 0 10px;
  font-size:clamp(19px,2vw,24px);
  font-weight:800;
  letter-spacing:.01em;
}
.page-about .about-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}
.page-about .about-link{
  display:inline-block;
  margin-top:8px;
  font-size:15px;
  font-weight:700;
  color:var(--blue);
  text-decoration:none;
  border-bottom:2px solid rgba(47,107,255,.35);
  padding-bottom:2px;
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible{
  border-bottom-color:var(--blue);
}
.page-about .about-chapter--dark .about-link{
  color:var(--mint);
  border-bottom-color:rgba(53,214,164,.4);
}
.page-about .about-chapter--dark .about-link:hover,
.page-about .about-chapter--dark .about-link:focus-visible{
  border-bottom-color:var(--mint);
}
.page-about .about-link-row{
  margin:24px 0 0;
}

/* ---------- 引用块 ---------- */
.page-about .about-quote{
  margin:28px 0 0;
  padding:22px 22px 22px 26px;
  background:var(--ink);
  color:var(--paper);
  border-left:4px solid var(--orange);
  font-size:clamp(17px,1.9vw,21px);
  line-height:1.65;
  font-weight:700;
  max-width:34ch;
}

/* ---------- 时间线 ---------- */
.page-about .tl{
  list-style:none;
  margin:36px 0 0;
  padding:0;
  display:grid;
  gap:18px;
  position:relative;
}
.page-about .tl__node{
  position:relative;
  padding-top:18px;
  min-width:0;
}
.page-about .tl__node::before{
  content:"";
  position:absolute;
  top:-4px;
  left:0;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--orange);
}
.page-about .tl__card{
  border:1px solid rgba(245,243,238,.22);
  background:var(--ink-panel);
  color:var(--paper);
  padding:16px 18px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.page-about .tl__card:hover,
.page-about .tl__card:focus-within{
  border-color:var(--blue);
}
.page-about .tl__card[open]{
  border-color:var(--orange);
  background:#16203a;
}
.page-about .tl__card summary{
  cursor:pointer;
  list-style:none;
  display:grid;
  gap:6px;
}
.page-about .tl__card summary::-webkit-details-marker{
  display:none;
}
.page-about .tl__year{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(24px,4vw,32px);
  line-height:1;
  color:var(--orange);
}
.page-about .tl__ver{
  font-size:16px;
  font-weight:800;
  letter-spacing:.01em;
}
.page-about .tl__card p{
  margin:12px 0 0;
  font-size:15px;
  line-height:1.75;
  color:#C9D2E6;
}

/* ---------- 档案图条 ---------- */
.page-about .about-arch{
  display:grid;
  gap:20px;
  margin-top:40px;
  align-items:center;
  padding-top:28px;
  border-top:1px dashed rgba(245,243,238,.22);
}
.page-about .about-arch--reverse{
  border-top:1px dashed var(--line);
}
.page-about .about-arch .media{
  max-width:280px;
  width:100%;
}
.page-about .about-arch--reverse .media{
  max-width:100%;
}
.page-about .about-arch .prose{
  margin-bottom:0;
}
.page-about .media img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

/* ---------- 团队 ---------- */
.page-about .team-intro{
  display:grid;
  gap:20px;
  margin-bottom:30px;
}
.page-about .team-intro__media{
  max-width:100%;
}
.page-about .team-intro .prose{
  margin:0;
}
.page-about .team{
  position:relative;
}
.page-about .team__radio{
  position:absolute;
  top:0;
  left:0;
  width:1px;
  height:1px;
  opacity:0;
  pointer-events:none;
}
.page-about .team__tabs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.page-about .team__tab{
  cursor:pointer;
  padding:9px 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--paper);
  color:var(--ink-text);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.page-about .team__tab:hover{
  border-color:var(--blue);
  color:var(--blue);
}
.page-about #team-1:checked ~ .team__tabs .team__tab[for="team-1"],
.page-about #team-2:checked ~ .team__tabs .team__tab[for="team-2"],
.page-about #team-3:checked ~ .team__tabs .team__tab[for="team-3"],
.page-about #team-4:checked ~ .team__tabs .team__tab[for="team-4"],
.page-about #team-5:checked ~ .team__tabs .team__tab[for="team-5"]{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper);
}
.page-about .team__panels{
  margin-top:22px;
}
.page-about .team__panel{
  display:none;
  padding:22px;
  background:var(--paper-soft);
  border-left:4px solid var(--blue);
}
.page-about #team-1:checked ~ .team__panels #team-panel-1,
.page-about #team-2:checked ~ .team__panels #team-panel-2,
.page-about #team-3:checked ~ .team__panels #team-panel-3,
.page-about #team-4:checked ~ .team__panels #team-panel-4,
.page-about #team-5:checked ~ .team__panels #team-panel-5{
  display:block;
}
.page-about .team__panel p{
  margin:0 0 12px;
  font-size:16px;
  line-height:1.75;
  max-width:62ch;
}
.page-about .team__list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:8px;
}
.page-about .team__list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  line-height:1.65;
  color:#2b3446;
}
.page-about .team__list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.6em;
  width:8px;
  height:8px;
  background:var(--orange);
  transform:rotate(45deg);
}

/* ---------- 生态 ---------- */
.page-about .eco{
  list-style:none;
  margin:26px 0;
  padding:0;
  display:grid;
  gap:14px;
}
.page-about .eco__item{
  background:var(--paper);
  border:1px solid var(--line);
  padding:20px;
  box-shadow:7px 7px 0 rgba(11,18,32,.08);
  display:grid;
  gap:6px;
}
.page-about .eco__num{
  font-family:var(--font-mono);
  font-size:clamp(32px,5vw,44px);
  font-weight:600;
  line-height:1;
  color:var(--blue);
}
.page-about .eco__num sup{
  font-size:.5em;
  color:var(--orange);
  vertical-align:super;
}
.page-about .eco__label{
  font-size:14px;
  line-height:1.6;
  color:var(--grey-blue);
}
.page-about .about-arch--reverse{
  margin-top:32px;
}

/* ---------- 服务承诺 ---------- */
.page-about .stats{
  list-style:none;
  margin:28px 0;
  padding:1px;
  display:grid;
  gap:1px;
  background:rgba(245,243,238,.2);
  border:1px solid rgba(245,243,238,.2);
}
.page-about .stats__item{
  background:var(--ink);
  padding:22px 20px;
  display:grid;
  gap:8px;
  align-content:start;
}
.page-about .stats__v{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(28px,4.4vw,42px);
  line-height:1;
  color:var(--paper);
}
.page-about .stats__item:nth-child(2) .stats__v{
  color:var(--mint);
}
.page-about .stats__item:nth-child(3) .stats__v{
  color:var(--orange);
}
.page-about .stats__v--text{
  font-size:clamp(20px,2.6vw,26px);
  letter-spacing:.02em;
}
.page-about .stats__v small{
  font-size:.42em;
  margin-left:2px;
  color:inherit;
  opacity:.85;
}
.page-about .stats__l{
  font-size:13px;
  line-height:1.6;
  color:#93A1BD;
  letter-spacing:.04em;
}

/* ---------- 服务中心 ---------- */
.page-about .visit{
  display:grid;
  gap:24px;
  margin-top:8px;
}
.page-about .visit__card{
  background:var(--paper-soft);
  border:1px solid var(--line);
  padding:22px;
  box-shadow:10px 10px 0 var(--ink);
  display:grid;
  gap:14px;
  align-content:start;
}
.page-about .visit__tag{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--orange-deep);
}
.page-about .visit__text{
  margin:0;
  font-size:15px;
  line-height:1.75;
  color:#2b3446;
}
.page-about .visit__card .about-link{
  margin-top:0;
  font-size:14px;
}
.page-about .about-top-row{
  margin:36px 0 0;
  padding-top:18px;
  border-top:1px dashed var(--line);
}
.page-about .about-top{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--grey-blue);
  text-decoration:none;
  border-bottom:1px solid var(--line);
  padding-bottom:3px;
}
.page-about .about-top:hover,
.page-about .about-top:focus-visible{
  color:var(--blue);
  border-bottom-color:var(--blue);
}

/* ---------- 断点 ---------- */
@media (min-width:640px){
  .page-about .eco{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .page-about .stats{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media (min-width:820px){
  .page-about .tl{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:20px;
    align-items:start;
    padding-top:8px;
  }
  .page-about .tl::before{
    content:"";
    position:absolute;
    left:0;
    right:0;
    top:0;
    height:1px;
    background:rgba(245,243,238,.28);
  }
  .page-about .tl__node:nth-child(2){
    margin-top:52px;
  }
  .page-about .tl__node:nth-child(3){
    margin-top:104px;
  }
  .page-about .about-arch{
    grid-template-columns:260px minmax(0,1fr);
    gap:clamp(24px,4vw,48px);
  }
  .page-about .about-arch--reverse{
    grid-template-columns:minmax(0,1fr) minmax(0,360px);
  }
  .page-about .team-intro{
    grid-template-columns:minmax(0,300px) minmax(0,1fr);
    gap:clamp(20px,3vw,36px);
    align-items:center;
  }
}

@media (min-width:900px){
  .page-about .about-hero__grid{
    grid-template-columns:minmax(0,1fr) 268px;
    align-items:end;
  }
  .page-about .about-chapter__inner{
    grid-template-columns:var(--about-rail) minmax(0,1fr);
    gap:clamp(28px,4vw,56px);
  }
  .page-about .about-chapter__rail{
    flex-direction:column;
    align-items:flex-start;
    gap:18px;
  }
  .page-about .visit{
    grid-template-columns:minmax(0,1fr) 336px;
    gap:clamp(24px,4vw,48px);
    align-items:start;
  }
}

@media (min-width:1024px){
  .page-about .stats{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .about-arch{
    grid-template-columns:300px minmax(0,1fr);
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about *{
    transition:none !important;
    animation:none !important;
  }
}
@media (prefers-reduced-motion:reduce){
  .page-about .tl__card,
  .page-about .team__tab{
    transition:none;
  }
}
<<<END>>>