.page-about{
  --x:50%;
  --y:50%;
  position:relative;
  overflow-x:clip;
  background:var(--ink);
  color:var(--text);
}

.page-about::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:6px;
  background:linear-gradient(180deg,var(--red) 0%,var(--red-ink) 55%,var(--red) 100%);
  z-index:2;
  pointer-events:none;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  padding:clamp(18px,3vw,30px) 0 clamp(24px,4vw,44px);
  background:
    radial-gradient(115% 80% at 84% 4%,rgba(214,25,43,.30),transparent 62%),
    linear-gradient(180deg,#0B0C0E 0%,#101318 100%);
}

.page-about .about-hero-grid{
  display:grid;
  gap:clamp(20px,3vw,34px);
}

.page-about .about-hero-copy h1{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(34px,6.6vw,66px);
  line-height:1.02;
  letter-spacing:-0.01em;
  margin:12px 0 16px;
  color:var(--text);
}

.page-about .h1-mark{
  color:var(--red-lit);
  display:inline-block;
  border-bottom:4px solid var(--red);
  padding-bottom:2px;
}

.page-about .about-lede{
  margin:0 0 22px;
  font-size:clamp(15px,1.6vw,17px);
  line-height:1.75;
  color:var(--text);
  max-width:34em;
}

.page-about .about-hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}

.page-about .about-hero-figure{
  margin:0;
  position:relative;
}

.page-about .about-hero-media{
  position:relative;
  border:1px solid var(--grid);
  background:var(--panel);
  overflow:hidden;
}

.page-about .about-hero-media img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:14/9;
  object-fit:cover;
}

.page-about .about-hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.10) 0 1px,transparent 1px 4px);
  opacity:.5;
  mix-blend-mode:overlay;
}

.page-about .about-hero-figure figcaption{
  margin-top:10px;
  font-size:12px;
  line-height:1.6;
  color:var(--muted);
  border-left:3px solid var(--red);
  padding-left:10px;
}

.page-about .about-hero-facts{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  margin-top:clamp(22px,3.4vw,38px);
  background:var(--grid);
  border:1px solid var(--grid);
}

.page-about .fact{
  background:var(--panel);
  padding:14px 16px;
}

.page-about .fact-num{
  display:block;
  font-family:var(--font-num);
  font-size:clamp(26px,3.6vw,38px);
  line-height:1.1;
  color:var(--cyan);
}

.page-about .fact-plus{
  color:var(--red-lit);
}

.page-about .fact-label{
  display:block;
  margin-top:4px;
  font-size:12px;
  letter-spacing:.02em;
  color:var(--muted);
}

/* ---------- 正文与索引 ---------- */
.page-about .about-body{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(18px,3vw,28px);
  padding-top:clamp(24px,4vw,44px);
  padding-bottom:clamp(32px,6vw,72px);
}

.page-about .about-index{
  order:-1;
}

.page-about .about-index-inner{
  background:var(--panel);
  border:1px solid var(--grid);
  padding:14px 16px;
}

.page-about .index-title{
  margin:0 0 10px;
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--red-lit);
}

.page-about .index-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  gap:8px;
  overflow-x:auto;
}

.page-about .index-list li{
  flex:0 0 auto;
}

.page-about .index-list a{
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:1px solid var(--grid);
  color:var(--text);
  font-size:13px;
  white-space:nowrap;
  text-decoration:none;
}

.page-about .index-num{
  font-family:var(--font-num);
  font-size:12px;
  color:var(--muted);
}

.page-about .index-list a:hover,
.page-about .index-list a:focus-visible{
  border-color:var(--red);
  color:#fff;
}

.page-about .index-list a:hover .index-num,
.page-about .index-list a:focus-visible .index-num{
  color:var(--red-lit);
}

.page-about .index-note{
  display:none;
  margin:14px 0 0;
  font-size:12px;
  line-height:1.7;
  color:var(--muted);
}

.page-about .index-note a{
  color:var(--red-lit);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec{
  position:relative;
  margin-bottom:clamp(18px,3vw,28px);
  padding:clamp(20px,3.2vw,40px);
  border:1px solid var(--grid);
}

.page-about .sec-paper{
  background:var(--cream);
  color:var(--brown);
  border-color:var(--sand);
}

.page-about .sec-dark{
  background:var(--panel);
  color:var(--text);
}

.page-about .sec-kicker{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0 0 12px;
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--red);
}

.page-about .sec-kicker::before{
  content:"";
  width:26px;
  height:3px;
  background:var(--red);
}

.page-about .sec-dark .sec-kicker{
  color:var(--red-lit);
}

.page-about .about-sec h2{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(24px,4.2vw,38px);
  line-height:1.06;
  letter-spacing:-0.01em;
  margin:0 0 14px;
}

.page-about .sec-paper h2,
.page-about .sec-paper h3{
  color:var(--brown);
}

.page-about .sec-dark h3{
  color:var(--text);
}

.page-about .prose p{
  margin:0 0 12px;
  font-size:clamp(15px,1.5vw,16px);
  line-height:1.8;
  max-width:36em;
}

.page-about .sec-paper .prose p{
  color:#3C2B22;
}

.page-about .about-sec a{
  color:var(--red-ink);
  text-decoration:underline;
  text-underline-offset:3px;
}

.page-about .sec-dark a{
  color:var(--red-lit);
}

/* ---------- 章节 01 四件事 ---------- */
.page-about .about-four{
  list-style:none;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:1px;
  margin:20px 0 0;
  padding:0;
  background:var(--sand);
  border:1px solid var(--sand);
}

.page-about .about-four li{
  background:#FAF3E4;
  padding:16px 18px;
}

.page-about .four-num{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--red);
}

.page-about .about-four h3{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:800;
  margin:6px 0 6px;
}

.page-about .about-four p{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:#4A362B;
}

/* ---------- 章节 02 流程 ---------- */
.page-about .about-flow{
  display:grid;
  gap:clamp(18px,3vw,30px);
}

.page-about .flow-row{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:12px;
  padding:14px 0;
  border-top:1px solid var(--grid);
}

.page-about .flow-row:last-child{
  border-bottom:1px solid var(--grid);
}

.page-about .flow-time{
  font-family:var(--font-num);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--cyan);
  padding-top:2px;
}

.page-about .flow-row p{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--text);
}

.page-about .about-overflow-figure{
  position:relative;
  margin:0 calc(-1 * clamp(0px,3.2vw,40px)) 0 0;
}

.page-about .about-overflow-figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:3/2;
  object-fit:cover;
  border:1px solid var(--grid);
}

.page-about .about-overflow-figure figcaption{
  position:absolute;
  left:0;
  bottom:0;
  max-width:84%;
  background:var(--cream);
  color:var(--brown);
  font-size:12px;
  line-height:1.6;
  padding:8px 12px;
  border-top:3px solid var(--red);
}

/* ---------- 章节 03 地区 ---------- */
.page-about .zone-wrap{
  display:grid;
  gap:20px;
}

.page-about .zone-map{
  position:relative;
  min-height:210px;
  border:1px solid var(--sand);
  background-color:#EFE4CE;
  background-image:radial-gradient(#C9B89A 1px,transparent 1px);
  background-size:14px 14px;
}

.page-about .zone-node{
  position:absolute;
  left:var(--x);
  top:var(--y);
  width:10px;
  height:10px;
  margin:-5px 0 0 -5px;
  background:var(--brown);
  cursor:default;
}

.page-about .zone-node--home{
  background:var(--gold);
  box-shadow:0 0 0 4px rgba(242,184,64,.32);
}

.page-about .zone-node::after{
  content:attr(data-zone);
  position:absolute;
  left:50%;
  bottom:calc(100% + 8px);
  transform:translateX(-50%) translateY(4px);
  background:var(--brown);
  color:var(--cream);
  font-size:12px;
  line-height:1;
  white-space:nowrap;
  padding:6px 8px;
  opacity:0;
  pointer-events:none;
  transition:opacity .18s ease,transform .18s ease;
}

.page-about .zone-node:hover::after,
.page-about .zone-node:focus-visible::after{
  opacity:1;
  transform:translateX(-50%) translateY(0);
}

.page-about .zone-node:focus-visible{
  outline:2px solid var(--red);
  outline-offset:3px;
}

.page-about .about-zone-figure{
  margin:20px 0 0;
}

.page-about .about-zone-figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:10/7;
  object-fit:cover;
  border:1px solid var(--sand);
}

/* ---------- 章节 04 班底 ---------- */
.page-about .staff-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:1px;
  margin-top:6px;
  background:var(--grid);
  border:1px solid var(--grid);
}

.page-about .staff-card{
  background:var(--panel-2);
  padding:18px;
}

.page-about .staff-num{
  display:block;
  font-family:var(--font-num);
  font-size:clamp(32px,4.6vw,48px);
  line-height:1;
  color:var(--cyan);
}

.page-about .staff-card h3{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  margin:8px 0 6px;
}

.page-about .staff-card p{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--muted);
}

.page-about .staff-note{
  margin:16px 0 0;
  font-size:13px;
  line-height:1.8;
  color:var(--muted);
  padding-left:14px;
  border-left:3px solid var(--red);
}

/* ---------- 章节 05 时间轴 ---------- */
.page-about .timeline{
  list-style:none;
  margin:20px 0 0;
  padding:0 0 0 20px;
  border-left:2px solid var(--sand);
}

.page-about .timeline li{
  position:relative;
  padding:0 0 16px;
}

.page-about .timeline li::before{
  content:"";
  position:absolute;
  left:-26px;
  top:7px;
  width:10px;
  height:10px;
  background:var(--red);
}

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

.page-about .timeline summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px;
  font-family:var(--font-display);
  font-size:clamp(18px,2.6vw,24px);
  font-weight:800;
  color:var(--brown);
}

.page-about .timeline summary::-webkit-details-marker{
  display:none;
}

.page-about .timeline summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--font-num);
  font-size:16px;
  color:var(--red);
}

.page-about .timeline details[open] summary::after{
  content:"–";
}

.page-about .tl-year{
  font-family:var(--font-num);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--red);
}

.page-about .timeline p{
  margin:10px 0 0;
  font-size:14px;
  line-height:1.8;
  color:#4A362B;
  max-width:34em;
}

/* ---------- 章节 06 合作 ---------- */
.page-about .partner-rows{
  margin-top:6px;
}

.page-about .partner-row{
  display:grid;
  gap:6px;
  padding:14px 0;
  border-top:1px solid var(--grid);
}

.page-about .partner-row h3{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  margin:0;
}

.page-about .partner-row p{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--muted);
}

.page-about .about-cta-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin:20px 0 0;
  font-size:14px;
}

.page-about .about-cta-line span{
  color:var(--grid);
}

/* ---------- 响应式 ---------- */
@media (min-width:560px){
  .page-about .about-four{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }

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

@media (min-width:760px){
  .page-about .staff-grid{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }

  .page-about .partner-row{
    grid-template-columns:150px minmax(0,1fr);
    gap:20px;
    align-items:baseline;
  }
}

@media (min-width:860px){
  .page-about .about-hero-grid{
    grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
    align-items:center;
  }

  .page-about .about-flow{
    grid-template-columns:minmax(0,1fr) minmax(0,.85fr);
    align-items:start;
  }

  .page-about .zone-wrap{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    align-items:start;
  }
}

@media (min-width:1024px){
  .page-about::before{
    width:14px;
  }

  .page-about .about-body{
    grid-template-columns:minmax(0,1fr) 288px;
    gap:0 44px;
    align-items:start;
  }

  .page-about .about-index{
    order:0;
  }

  .page-about .about-index-inner{
    position:sticky;
    top:96px;
    padding:18px;
  }

  .page-about .index-list{
    display:block;
    overflow:visible;
  }

  .page-about .index-list li{
    margin-bottom:6px;
  }

  .page-about .index-list a{
    border:0;
    border-left:2px solid var(--grid);
    padding:8px 10px;
    white-space:normal;
  }

  .page-about .index-list a:hover,
  .page-about .index-list a:focus-visible{
    border-left-color:var(--red);
    background:var(--panel-2);
  }

  .page-about .index-note{
    display:block;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about .zone-node,
  .page-about .zone-node::after,
  .page-about .index-list a{
    transition:none;
  }
}
<<<END>>>