.page-about{
  --ab-rail:196px;
  background:var(--wd-bg);
  color:var(--wd-text);
  font-family:var(--wd-font-sans);
}

.page-about .ab-mono{
  font-family:var(--wd-font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}

.page-about .ab-topbar{
  background:var(--wd-sand);
  border-bottom:1px solid var(--wd-line-soft);
}
.page-about .ab-topbar .wd-shell{
  padding-top:14px;
  padding-bottom:14px;
}
.page-about .ab-topbar .wd-breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--wd-rock);
}
.page-about .ab-topbar .wd-breadcrumb li + li::before{
  content:"/";
  margin-right:10px;
  color:var(--wd-moss);
}
.page-about .ab-topbar .wd-breadcrumb a{
  color:var(--wd-ink-800);
  text-decoration:none;
  border-bottom:1px solid var(--wd-line-dark);
  padding-bottom:1px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero{
  position:relative;
  overflow:hidden;
  background:var(--wd-ink-900);
  color:var(--wd-cream);
  padding:36px 0 0;
}
.page-about .ab-hero::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(90deg, rgba(176,138,74,.12) 0 1px, transparent 1px 96px),
    radial-gradient(90% 70% at 8% 0%, rgba(23,59,49,.95), rgba(14,42,35,0) 62%);
}
.page-about .ab-hero .wd-shell{
  position:relative;
  z-index:1;
}
.page-about .ab-hero__eyebrow{
  display:flex;
  align-items:baseline;
  gap:10px;
  margin:0;
  font-size:12px;
  letter-spacing:.18em;
  color:rgba(246,241,230,.58);
}
.page-about .ab-hero__eyebrow .ab-mono{
  color:var(--wd-brass-lit);
  font-size:12px;
}
.page-about .ab-hero h1{
  margin:18px 0 0;
  font-family:var(--wd-font-serif);
  font-weight:300;
  font-size:clamp(30px,7.2vw,64px);
  line-height:1.18;
  letter-spacing:.06em;
  color:var(--wd-cream);
}
.page-about .ab-hero__lead{
  margin:22px 0 0;
  max-width:38em;
  font-size:clamp(15px,2.4vw,17px);
  line-height:1.9;
  color:rgba(246,241,230,.78);
}
.page-about .ab-hero__meta{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px 20px;
  margin:30px 0 0;
  padding:22px 0 0;
  list-style:none;
  border-top:1px solid rgba(176,138,74,.34);
}
.page-about .ab-hero__meta li{
  display:flex;
  flex-direction:column;
  gap:6px;
  font-size:12px;
  letter-spacing:.09em;
  color:rgba(246,241,230,.6);
}
.page-about .ab-hero__meta .ab-mono{
  font-size:24px;
  line-height:1;
  color:var(--wd-brass-lit);
}
.page-about .ab-hero__figure{
  position:relative;
  z-index:1;
  margin:34px 0 0;
}
.page-about .ab-hero__figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:16/9;
  object-fit:cover;
  filter:saturate(.92) contrast(1.03);
}
.page-about .ab-hero__cap{
  display:block;
  padding-top:12px;
  padding-bottom:26px;
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(246,241,230,.55);
}

/* ---------- 主体骨架 ---------- */
.page-about .ab-body{
  display:grid;
  gap:8px;
  padding-top:34px;
  padding-bottom:64px;
}
.page-about .ab-content{
  min-width:0;
}

.page-about .ab-rail{
  border-bottom:1px solid var(--wd-line-soft);
  padding-bottom:14px;
}
.page-about .ab-rail__label{
  margin:0 0 10px;
  font-size:11px;
  letter-spacing:.22em;
  color:var(--wd-moss);
}
.page-about .ab-rail__list{
  display:flex;
  gap:8px;
  margin:0;
  padding:0 0 4px;
  list-style:none;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
.page-about .ab-rail__list a{
  display:flex;
  align-items:baseline;
  gap:6px;
  white-space:nowrap;
  padding:6px 10px;
  border:1px solid var(--wd-line);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--wd-rock);
  text-decoration:none;
  transition:color var(--wd-dur) var(--wd-ease), border-color var(--wd-dur) var(--wd-ease);
}
.page-about .ab-rail__list a .ab-mono{
  font-size:11px;
  color:var(--wd-brass);
}
.page-about .ab-rail__list a:hover,
.page-about .ab-rail__list a:focus-visible{
  color:var(--wd-ink-900);
  border-color:var(--wd-brass);
}

/* ---------- 章节 ---------- */
.page-about .ab-sec{
  border-top:1px solid var(--wd-line);
  padding:30px 0 38px;
}
.page-about .ab-content > .ab-sec:first-child{
  border-top:0;
  padding-top:0;
}
.page-about .ab-sec__head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:20px;
}
.page-about .ab-sec__num{
  font-family:var(--wd-font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--wd-brass);
}
.page-about .ab-sec__title{
  margin:0;
  font-family:var(--wd-font-serif);
  font-weight:400;
  font-size:clamp(21px,3.6vw,28px);
  line-height:1.4;
  letter-spacing:.06em;
  color:var(--wd-ink-900);
}
.page-about .ab-sec p{
  margin:0 0 14px;
  max-width:40em;
  font-size:16px;
  line-height:1.9;
  color:var(--wd-graphite);
}
.page-about .ab-sec p:last-child{
  margin-bottom:0;
}
.page-about .ab-sec a{
  color:var(--wd-ink-800);
  text-decoration:none;
  border-bottom:1px solid var(--wd-brass);
}
.page-about .ab-sec a:hover{
  color:var(--wd-brass);
}

/* 服务范围 */
.page-about .ab-svc{
  display:grid;
  gap:1px;
  margin:24px 0 0;
  padding:0;
  list-style:none;
  background:var(--wd-line-soft);
  border-top:1px solid var(--wd-line-soft);
  border-bottom:1px solid var(--wd-line-soft);
}
.page-about .ab-svc li{
  display:grid;
  grid-template-columns:28px minmax(0,1fr);
  gap:12px;
  padding:16px;
  background:var(--wd-cream);
}
.page-about .ab-svc .ab-mono{
  font-size:12px;
  color:var(--wd-brass);
  padding-top:4px;
}
.page-about .ab-svc h3{
  margin:0;
  font-family:var(--wd-font-serif);
  font-weight:500;
  font-size:16px;
  letter-spacing:.05em;
  color:var(--wd-ink-900);
}
.page-about .ab-svc p{
  margin:6px 0 0;
  font-size:14px;
  line-height:1.8;
  color:var(--wd-rock);
}

/* 八个入口 */
.page-about .ab-entries{
  margin:24px 0;
  border:1px solid var(--wd-line);
  background:var(--wd-cream);
}
.page-about .ab-entries__label{
  margin:0;
  padding:12px 16px;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--wd-ink-800);
  background:rgba(176,138,74,.1);
  border-bottom:1px solid var(--wd-line);
}
.page-about .ab-entries ol{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  margin:0;
  padding:6px 0;
  list-style:none;
}
.page-about .ab-entries li{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:9px 16px;
  font-size:15px;
  letter-spacing:.03em;
  color:var(--wd-graphite);
  border-bottom:1px solid var(--wd-line-soft);
}
.page-about .ab-entries li:last-child{
  border-bottom:0;
}
.page-about .ab-entries li .ab-mono{
  font-size:12px;
  color:var(--wd-brass);
}

.page-about .wd-note{
  margin-top:20px;
  background:rgba(246,241,230,.6);
}
.page-about .wd-note p{
  font-size:14px;
  line-height:1.85;
  color:var(--wd-text-dim);
}

/* 流程 */
.page-about .ab-flow{
  margin:22px 0 0;
  padding:0 0 0 22px;
  list-style:none;
  border-left:1px solid var(--wd-line);
}
.page-about .ab-flow li{
  position:relative;
  padding:0 0 22px 0;
}
.page-about .ab-flow li:last-child{
  padding-bottom:0;
}
.page-about .ab-flow li::before{
  content:"";
  position:absolute;
  left:-26px;
  top:10px;
  width:7px;
  height:7px;
  background:var(--wd-brass);
}
.page-about .ab-flow__num{
  font-family:var(--wd-font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--wd-brass);
}
.page-about .ab-flow h3{
  margin:6px 0 5px;
  font-family:var(--wd-font-serif);
  font-weight:500;
  font-size:16px;
  letter-spacing:.05em;
  color:var(--wd-ink-900);
}
.page-about .ab-flow p{
  margin:0;
  font-size:14px;
  line-height:1.85;
  color:var(--wd-rock);
}

/* 时间线 */
.page-about .ab-tl{
  margin-top:6px;
}
.page-about .ab-tl__node{
  border-bottom:1px solid var(--wd-line-soft);
}
.page-about .ab-tl__trigger{
  display:grid;
  grid-template-columns:60px minmax(0,1fr) 18px;
  align-items:center;
  gap:12px;
  width:100%;
  padding:16px 2px;
  background:none;
  border:0;
  text-align:left;
  cursor:pointer;
  color:var(--wd-graphite);
  font-family:var(--wd-font-sans);
  transition:color var(--wd-dur) var(--wd-ease);
}
.page-about .ab-tl__trigger:hover,
.page-about .ab-tl__trigger:focus-visible{
  color:var(--wd-ink-800);
}
.page-about .ab-tl__trigger:hover .ab-tl__name{
  color:var(--wd-brass);
}
.page-about .ab-tl__year{
  font-family:var(--wd-font-mono);
  font-size:15px;
  letter-spacing:.04em;
  color:var(--wd-brass);
}
.page-about .ab-tl__name{
  font-family:var(--wd-font-serif);
  font-size:16px;
  letter-spacing:.05em;
  transition:color var(--wd-dur-fast) var(--wd-ease);
}
.page-about .ab-tl__mark{
  position:relative;
  width:14px;
  height:14px;
  justify-self:end;
}
.page-about .ab-tl__mark::before,
.page-about .ab-tl__mark::after{
  content:"";
  position:absolute;
  background:var(--wd-brass);
  transition:transform var(--wd-dur) var(--wd-ease), opacity var(--wd-dur) var(--wd-ease);
}
.page-about .ab-tl__mark::before{
  left:0;
  top:6px;
  width:14px;
  height:1.5px;
}
.page-about .ab-tl__mark::after{
  left:6px;
  top:0;
  width:1.5px;
  height:14px;
}
.page-about .ab-tl__node[data-open] .ab-tl__mark::after{
  transform:scaleY(0);
  opacity:0;
}
.page-about .ab-tl__node .wd-expand__inner p{
  padding:0 2px 18px 0;
  font-size:14px;
  line-height:1.85;
  color:var(--wd-rock);
}

.page-about .ab-fig{
  margin:26px 0 0;
}
.page-about .ab-fig img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:7/5;
  object-fit:cover;
}
.page-about .ab-fig figcaption{
  margin-top:10px;
  font-size:12px;
  line-height:1.8;
  letter-spacing:.08em;
  color:var(--wd-rock);
}

/* 合作生态（深色段） */
.page-about .ab-sec--dark{
  background:var(--wd-ink-800);
  border-top:0;
  padding:30px 20px 32px;
  margin:14px 0;
}
.page-about .ab-sec--dark .ab-sec__num{
  color:var(--wd-brass-lit);
}
.page-about .ab-sec--dark .ab-sec__title{
  color:var(--wd-cream);
}
.page-about .ab-sec--dark p{
  color:rgba(246,241,230,.76);
}
.page-about .ab-sec--dark a{
  color:var(--wd-brass-lit);
  border-bottom-color:var(--wd-line-dark);
}
.page-about .ab-counts{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
  margin:20px 0 8px;
  padding:18px 0;
  border-top:1px solid rgba(176,138,74,.36);
  border-bottom:1px solid rgba(176,138,74,.36);
}
.page-about .ab-counts__cell{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.page-about .ab-counts__num{
  font-family:var(--wd-font-mono);
  font-size:clamp(32px,7vw,44px);
  line-height:1;
  color:var(--wd-brass-lit);
}
.page-about .ab-counts__label{
  font-size:12px;
  letter-spacing:.09em;
  color:rgba(246,241,230,.66);
}
.page-about .ab-plist{
  margin:16px 0 0;
  padding:0;
  list-style:none;
}
.page-about .ab-plist li{
  padding:11px 0 11px 16px;
  border-left:2px solid rgba(176,138,74,.5);
  margin-bottom:8px;
  font-size:14px;
  line-height:1.85;
  color:rgba(246,241,230,.82);
}
.page-about .ab-plist li:last-child{
  margin-bottom:0;
}

/* 服务原则 */
.page-about .ab-principles{
  display:grid;
  gap:22px;
  margin-top:20px;
}
.page-about .ab-principles__fig{
  margin:0;
}
.page-about .ab-principles__fig img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:1/1;
  object-fit:cover;
}
.page-about .ab-principles__list{
  margin:0;
  padding:0;
  list-style:none;
}
.page-about .ab-principles__list li{
  padding:16px 0;
  border-top:1px solid var(--wd-line-soft);
}
.page-about .ab-principles__list li:first-child{
  border-top:0;
  padding-top:0;
}
.page-about .ab-principles__list .ab-mono{
  font-size:12px;
  color:var(--wd-brass);
}
.page-about .ab-principles__list h3{
  margin:6px 0 6px;
  font-family:var(--wd-font-serif);
  font-weight:500;
  font-size:17px;
  letter-spacing:.05em;
  color:var(--wd-ink-900);
}
.page-about .ab-principles__list p{
  margin:0;
  font-size:15px;
  line-height:1.85;
  color:var(--wd-rock);
}

.page-about .ab-cta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:26px;
  padding:22px;
  background:var(--wd-cream);
  border:1px solid var(--wd-line);
}
.page-about .ab-cta p{
  flex:1 1 260px;
  margin:0;
  font-size:15px;
  line-height:1.8;
  color:var(--wd-ink-800);
}
.page-about .ab-cta .wd-btn{
  flex:0 0 auto;
}

/* ---------- 断点 ---------- */
@media (min-width:640px){
  .page-about .ab-entries ol{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .ab-entries li:nth-last-child(2){
    border-bottom:0;
  }
  .page-about .ab-hero__meta{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .ab-svc li{
    grid-template-columns:40px minmax(0,1fr);
    padding:18px 20px;
  }
}

@media (min-width:900px){
  .page-about .ab-body{
    grid-template-columns:var(--ab-rail) minmax(0,1fr);
    gap:64px;
    padding-top:52px;
    padding-bottom:88px;
  }
  .page-about .ab-rail{
    position:sticky;
    top:calc(var(--wd-head-h) + 28px);
    align-self:start;
    border-bottom:0;
    border-left:1px solid var(--wd-line);
    padding:0 0 0 16px;
    max-height:calc(100vh - var(--wd-head-h) - 56px);
    overflow:auto;
  }
  .page-about .ab-rail__list{
    flex-direction:column;
    gap:0;
    overflow:visible;
    padding-bottom:0;
  }
  .page-about .ab-rail__list li{
    border-bottom:1px solid var(--wd-line-soft);
  }
  .page-about .ab-rail__list a{
    border:0;
    padding:9px 0;
    white-space:normal;
  }
  .page-about .ab-rail__list a:hover,
  .page-about .ab-rail__list a:focus-visible{
    border-bottom:1px solid var(--wd-brass);
  }
  .page-about .ab-hero{
    padding-top:56px;
  }
  .page-about .ab-hero__figure{
    margin-top:44px;
  }
  .page-about .ab-hero__cap{
    padding-bottom:32px;
  }
  .page-about .ab-sec{
    padding:38px 0 46px;
  }
  .page-about .ab-sec--dark{
    padding:38px 34px 40px;
    margin:18px 0;
  }
  .page-about .ab-principles{
    grid-template-columns:minmax(0,300px) minmax(0,1fr);
    align-items:start;
    gap:34px;
  }
  .page-about .ab-tl__trigger{
    grid-template-columns:80px minmax(0,1fr) 18px;
    padding:18px 4px;
  }
  .page-about .ab-tl__node .wd-expand__inner p{
    padding-left:84px;
  }
}

@media (min-width:1180px){
  .page-about .ab-hero h1{
    max-width:15em;
  }
  .page-about .ab-sec p{
    font-size:17px;
  }
}
<<<END>>>