.page-about{
  position:relative;
  background:
    repeating-linear-gradient(118deg, rgba(47,168,184,.035) 0 1px, transparent 1px 18px),
    var(--bg);
  color:var(--snow);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  overflow:hidden;
  padding:104px 0 0;
  border-bottom:2px solid var(--line-strong);
}
.page-about .about-hero__media{
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
}
.page-about .about-hero__media img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 28%;
  opacity:.3;
}
.page-about .about-hero__media::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(115deg, rgba(10,22,51,.95) 0%, rgba(10,22,51,.8) 46%, rgba(10,22,51,.46) 100%),
    repeating-linear-gradient(115deg, rgba(47,168,184,.07) 0 2px, transparent 2px 16px);
}
.page-about .about-hero__inner{
  position:relative;
  z-index:1;
  padding-bottom:52px;
}
.page-about .bc-sep{
  margin:0 8px;
  color:var(--gold);
  font-family:var(--font-mono);
}
.page-about .about-hero h1{
  margin:16px 0 0;
  max-width:22ch;
  font-family:var(--font-heading);
  font-size:clamp(30px,6.4vw,54px);
  line-height:1.16;
  letter-spacing:.05em;
  color:var(--snow);
}
.page-about .about-hero__lead{
  margin:24px 0 0;
  max-width:62ch;
  font-size:17px;
  line-height:1.78;
  color:rgba(244,247,255,.86);
}
.page-about .about-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:32px;
}
.page-about .about-hero__bar{
  position:relative;
  z-index:1;
  border-top:2px solid var(--line-strong);
  background:rgba(5,11,26,.74);
  backdrop-filter:blur(6px);
}
.page-about .about-hero__bar-inner{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
}
.page-about .hero-stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:20px 10px;
  border-right:1px solid var(--line);
}
.page-about .hero-stat:last-child{border-right:0}
.page-about .hero-stat .num{
  font-family:var(--font-mono);
  font-size:clamp(22px,5vw,32px);
  line-height:1;
  letter-spacing:.02em;
  color:var(--gold);
}
.page-about .hero-stat__label{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--mute);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body{
  display:grid;
  gap:40px;
  padding-top:64px;
  padding-bottom:72px;
}
.page-about .about-body > *{min-width:0}
.page-about .about-flow{min-width:0}

.page-about .about-toc{display:none}
.page-about .about-toc__title{
  margin:0 0 14px;
  font-family:var(--font-heading);
  font-size:13px;
  letter-spacing:.18em;
  color:var(--mute);
}
.page-about .about-toc__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.page-about .about-toc__list a{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:7px 0;
  font-size:14px;
  letter-spacing:.04em;
  color:rgba(244,247,255,.72);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.page-about .about-toc__list .num{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--cyan);
}
.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible{
  color:var(--gold);
  border-bottom-color:var(--gold);
}

.page-about .about-flow > * + *{margin-top:64px}
.page-about .about-sec{
  padding-top:36px;
  border-top:2px solid var(--line);
}
.page-about .about-sec:first-child{
  padding-top:0;
  border-top:0;
}
.page-about .section-title{
  margin:14px 0 0;
  max-width:26ch;
  font-family:var(--font-heading);
  font-size:clamp(22px,3.7vw,32px);
  line-height:1.3;
  letter-spacing:.06em;
  color:var(--snow);
}
.page-about .about-lede{
  margin:16px 0 0;
  max-width:60ch;
  font-size:16px;
  line-height:1.78;
  color:var(--mute);
}

/* ---------- 两栏错位 ---------- */
.page-about .about-two{
  display:grid;
  gap:28px;
  margin-top:28px;
}
.page-about .about-two--tight{margin-top:32px}

/* ---------- 侧栏 ---------- */
.page-about .about-aside{
  padding:24px;
  background:var(--bg-card);
  border:2px solid var(--line-strong);
  box-shadow:var(--shadow-hard-sm);
}
.page-about .about-aside__text{
  margin:12px 0 0;
  font-size:15px;
  line-height:1.75;
  color:rgba(244,247,255,.82);
}
.page-about .about-list{
  list-style:none;
  margin:14px 0 0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:11px;
}
.page-about .about-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  line-height:1.65;
  color:rgba(244,247,255,.82);
}
.page-about .about-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  width:8px;
  height:8px;
  background:var(--gold);
  transform:rotate(45deg);
}

/* ---------- 时间线 ---------- */
.page-about .tl-hint{
  margin:18px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--cyan);
}
.page-about .tl-track{
  display:flex;
  gap:18px;
  margin-top:18px;
  padding:4px 2px 20px;
  overflow-x:auto;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
  scrollbar-color:var(--gold-dark) transparent;
}
.page-about .tl-track::-webkit-scrollbar{height:6px}
.page-about .tl-track::-webkit-scrollbar-thumb{background:var(--gold-dark)}
.page-about .tl-node{
  flex:0 0 258px;
  scroll-snap-align:start;
  padding:22px 20px 24px;
  background:var(--bg-card);
  border:2px solid var(--line-strong);
  border-top:6px solid var(--gold);
  box-shadow:var(--shadow-hard-sm);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.page-about .tl-node:hover{
  transform:translate(-3px,-3px);
  border-color:var(--gold);
}
.page-about .tl-year{
  display:block;
  font-family:var(--font-mono);
  font-size:40px;
  line-height:1;
  letter-spacing:.02em;
  color:var(--gold);
}
.page-about .tl-title{
  margin:14px 0 8px;
  font-family:var(--font-heading);
  font-size:18px;
  letter-spacing:.06em;
  color:var(--snow);
}
.page-about .tl-node p{
  margin:0;
  font-size:14.5px;
  line-height:1.72;
  color:var(--mute);
}

/* ---------- 图注容器 ---------- */
.page-about .about-figure{
  margin:32px 0 0;
  border:2px solid var(--line-strong);
  box-shadow:var(--shadow-hard-sm);
  background:var(--bg-card);
  overflow:hidden;
}
.page-about .about-figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-figure figcaption{
  padding:12px 16px;
  font-size:13px;
  line-height:1.65;
  color:var(--mute);
  border-top:2px solid var(--line);
  background:rgba(5,11,26,.5);
}
.page-about .about-two--media-first .about-figure{margin-top:0}

/* ---------- 栏目结构图 ---------- */
.page-about .about-mapwrap{
  margin-top:28px;
  padding:20px 14px;
  background:linear-gradient(160deg, rgba(16,34,74,.92), rgba(10,22,51,.62));
  border:2px solid var(--line-strong);
  box-shadow:var(--shadow-hard-sm);
  overflow-x:auto;
}
.page-about .about-map{
  display:block;
  width:100%;
  min-width:600px;
  height:auto;
}
.page-about .map-node rect{
  fill:var(--bg-card);
  stroke:var(--line-strong);
  stroke-width:2;
  transition:stroke .2s var(--ease),fill .2s var(--ease);
}
.page-about .map-node text{
  fill:var(--snow);
  font-family:var(--font-heading);
  font-size:19px;
  letter-spacing:.08em;
  text-anchor:middle;
}
.page-about .map-node:hover rect{
  stroke:var(--gold);
  fill:#16305f;
}
.page-about .map-hub rect{
  fill:rgba(232,179,60,.09);
  stroke:var(--gold);
  stroke-width:2.5;
}
.page-about .map-hub__title{
  fill:var(--gold);
  font-family:var(--font-heading);
  font-size:22px;
  letter-spacing:.14em;
  text-anchor:middle;
}
.page-about .map-sub rect{
  fill:#0d1c3e;
  stroke:var(--line);
  stroke-width:2;
  transition:stroke .2s var(--ease);
}
.page-about .map-sub text{
  fill:rgba(244,247,255,.86);
  font-family:var(--font-body);
  font-size:15px;
  letter-spacing:.04em;
  text-anchor:middle;
}
.page-about .map-sub rect:hover{stroke:var(--cyan)}
.page-about .map-links polyline{
  fill:none;
  stroke:var(--cyan);
  stroke-width:2;
  stroke-dasharray:7 6;
  opacity:.7;
}

.page-about .about-paths{
  list-style:none;
  margin:32px 0 0;
  padding:0;
  border-top:2px solid var(--line);
}
.page-about .about-paths li{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:16px;
  align-items:baseline;
  padding:20px 0;
  border-bottom:2px solid var(--line);
}
.page-about .about-paths .num{
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.06em;
  color:var(--gold);
}
.page-about .about-paths strong{
  display:block;
  font-size:16px;
  letter-spacing:.03em;
  color:var(--snow);
}
.page-about .about-paths p{
  margin:6px 0 0;
  font-size:15px;
  line-height:1.72;
  color:var(--mute);
}

/* ---------- 入口识别 ---------- */
.page-about .about-rules{
  list-style:none;
  margin:28px 0 0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.page-about .about-rules li{
  padding:22px 22px 24px 24px;
  background:rgba(16,34,74,.62);
  border-width:2px 2px 2px 6px;
  border-style:solid;
  border-color:var(--line-strong) var(--line-strong) var(--line-strong) var(--gold);
  box-shadow:var(--shadow-hard-sm);
}
.page-about .about-rules h3{
  margin:0 0 10px;
  font-family:var(--font-heading);
  font-size:18px;
  letter-spacing:.06em;
  color:var(--snow);
}
.page-about .about-rules p{
  margin:0;
  font-size:15px;
  line-height:1.76;
  color:rgba(244,247,255,.8);
}

/* ---------- 团队 ---------- */
.page-about .team-rows{display:flex;flex-direction:column}
.page-about .team-row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:18px;
  padding:20px 0;
  border-bottom:2px solid var(--line);
}
.page-about .team-row:first-child{
  border-top:2px solid var(--line);
  padding-top:4px;
}
.page-about .team-row__num{
  font-family:var(--font-mono);
  font-size:34px;
  line-height:1;
  color:var(--gold);
}
.page-about .team-row h3{
  margin:0 0 8px;
  font-family:var(--font-heading);
  font-size:17px;
  letter-spacing:.06em;
  color:var(--snow);
}
.page-about .team-row p{
  margin:0;
  font-size:15px;
  line-height:1.74;
  color:var(--mute);
}

/* ---------- 覆盖 ---------- */
.page-about .coverage{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  margin-top:28px;
  border:2px solid var(--line-strong);
  background:var(--line);
}
.page-about .coverage__item{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px 18px;
  background:var(--bg-card);
}
.page-about .coverage__item .num{
  font-family:var(--font-mono);
  font-size:30px;
  line-height:1;
  letter-spacing:.02em;
  color:var(--gold);
}
.page-about .coverage__item p{
  margin:0;
  font-size:13.5px;
  line-height:1.6;
  color:var(--mute);
}

/* ---------- 结尾入口带 ---------- */
.page-about .about-cta{
  border-top:2px solid var(--line-strong);
  border-bottom:2px solid var(--line-strong);
  background:
    repeating-linear-gradient(118deg, rgba(232,179,60,.05) 0 1px, transparent 1px 20px),
    rgba(5,11,26,.78);
}
.page-about .about-cta__inner{
  display:grid;
  gap:26px;
  padding-top:52px;
  padding-bottom:56px;
}
.page-about .about-cta h2{
  margin:14px 0 0;
  max-width:24ch;
  font-family:var(--font-heading);
  font-size:clamp(21px,3.4vw,30px);
  line-height:1.32;
  letter-spacing:.06em;
  color:var(--snow);
}
.page-about .about-cta__text p:last-child{
  margin:16px 0 0;
  max-width:56ch;
  font-size:15.5px;
  line-height:1.78;
  color:var(--mute);
}
.page-about .about-cta__actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  align-items:flex-start;
}

/* ---------- 响应式 ---------- */
@media (max-width:767px){
  .page-about .about-br{display:none}
  .page-about .about-hero{padding-top:92px}
}

@media (min-width:860px){
  .page-about .about-two{
    grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
    gap:40px;
    align-items:start;
  }
  .page-about .about-two--media-first{
    grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);
  }
  .page-about .coverage{grid-template-columns:repeat(4,minmax(0,1fr))}
}

@media (min-width:1024px){
  .page-about .about-hero{padding-top:132px}
  .page-about .about-body{
    grid-template-columns:236px minmax(0,1fr);
    gap:72px;
    padding-top:88px;
    padding-bottom:88px;
  }
  .page-about .about-toc{
    display:block;
    position:sticky;
    top:112px;
    align-self:start;
    padding-left:20px;
    border-left:2px solid var(--line-strong);
  }
  .page-about .about-flow > * + *{margin-top:80px}
  .page-about .about-cta__inner{
    grid-template-columns:minmax(0,1fr) auto;
    align-items:end;
    gap:48px;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about .tl-node,
  .page-about .map-node rect,
  .page-about .about-toc__list a{
    transition:none;
  }
  .page-about .tl-node:hover{transform:none}
}