.page-about{
  --ab-rule: rgba(30,58,110,.9);
  --ab-rule-soft: rgba(30,58,110,.5);
  --ab-glass: linear-gradient(180deg, rgba(18,36,74,.62), rgba(10,23,48,.9));
  display:block;
  background: var(--ink-abyss);
  color: var(--text-body);
  font-family: var(--font-ui);
  overflow-x:hidden;
}

/* ---------- 容器 ---------- */
.page-about .about-wrap{
  width:100%;
  max-width: var(--shell);
  margin:0 auto;
  padding: clamp(96px,12vw,142px) var(--gutter) clamp(56px,8vw,108px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs{
  font-size:13px;
  line-height:1.6;
  color: var(--text-muted);
  margin-bottom: clamp(20px,3vw,32px);
}
.page-about .breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  list-style:none;
  margin:0;
  padding:0;
}
.page-about .breadcrumbs li{
  display:flex;
  align-items:center;
  gap:6px;
}
.page-about .breadcrumbs li + li::before{
  content:"/";
  color: var(--ink-lift);
}
.page-about .breadcrumbs a{
  color: var(--text-muted);
  text-decoration:none;
  transition: color var(--ease);
}
.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible{
  color: var(--signal-cyan);
}
.page-about .breadcrumbs [aria-current="page"]{
  color: var(--text-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  padding-bottom: clamp(30px,4.5vw,52px);
  border-bottom:1px solid var(--ab-rule-soft);
}
.page-about .about-hero::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  width: clamp(72px,14vw,132px);
  height:2px;
  background: linear-gradient(90deg, var(--signal-cyan), var(--signal-orange));
}
.page-about .about-hero .eyebrow{
  display:inline-block;
  font-size:13px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color: var(--signal-cyan);
  margin:0 0 clamp(12px,2vw,18px);
}
.page-about h1{
  font-family: var(--font-display);
  font-weight:600;
  font-size: clamp(28px,4vw,40px);
  line-height:1.32;
  letter-spacing:-.01em;
  color: var(--text-bright);
  margin:0;
  max-width: 22em;
  text-wrap: balance;
}
.page-about .about-lede{
  margin: clamp(16px,2.4vw,24px) 0 0;
  font-size:16px;
  line-height:1.8;
  color: var(--text-body);
  max-width: 62ch;
}

.page-about .hero-stats{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:1px;
  margin: clamp(26px,4vw,42px) 0 0;
  padding:0;
  background: var(--ab-rule-soft);
  border:1px solid var(--ab-rule-soft);
  border-radius: var(--radius-sm);
  overflow:hidden;
}
.page-about .hero-stats > div{
  background: var(--ab-glass);
  padding: 16px 18px;
  transition: background var(--ease);
}
.page-about .hero-stats > div:hover{
  background: linear-gradient(180deg, rgba(30,58,110,.8), rgba(10,23,48,.94));
}
.page-about .hero-stats dt{
  font-size:13px;
  letter-spacing:.04em;
  color: var(--text-muted);
  margin:0;
}
.page-about .hero-stats dd{
  margin:8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(22px,2.6vw,28px);
  line-height:1.05;
  color: var(--text-bright);
  display:flex;
  align-items:baseline;
  gap:2px;
}
.page-about .hero-stats .unit{
  font-family: var(--font-ui);
  font-size:13px;
  color: var(--signal-cyan);
  letter-spacing:.02em;
}

/* ---------- 区块通用 ---------- */
.page-about .section{
  padding: clamp(44px,7vw,84px) 0 0;
}
.page-about .section-title{
  font-family: var(--font-display);
  font-weight:600;
  font-size: clamp(20px,2.8vw,26px);
  line-height:1.45;
  color: var(--text-bright);
  margin:0;
  max-width: 26em;
}
.page-about .section-note{
  margin: clamp(10px,1.6vw,16px) 0 0;
  font-size:16px;
  line-height:1.75;
  color: var(--text-muted);
  max-width: 62ch;
}
.page-about .section .eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:.18em;
  color: var(--text-muted);
  margin:0 0 clamp(10px,1.6vw,14px);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline{
  position:relative;
  border-radius: var(--radius);
  border:1px solid var(--ab-rule-soft);
  background:
    radial-gradient(120% 68% at 8% 0%, rgba(52,245,214,.10), transparent 62%),
    linear-gradient(180deg, rgba(10,23,48,.94), rgba(5,11,24,.35) 92%);
  padding: clamp(26px,4vw,46px) clamp(18px,3vw,40px);
}
.page-about .about-timeline-media{
  margin: clamp(20px,3vw,32px) 0 clamp(28px,4vw,44px);
  border-radius: var(--radius-sm);
  overflow:hidden;
}
.page-about .about-timeline-list{
  position:relative;
  list-style:none;
  margin:0;
  padding:0 0 0 34px;
}
.page-about .about-timeline-list::before{
  content:"";
  position:absolute;
  left:9px;
  top:10px;
  bottom:24px;
  width:1px;
  background: linear-gradient(180deg, rgba(52,245,214,.75), rgba(123,92,255,.45) 58%, rgba(30,58,110,.12));
}
.page-about .tl-item{
  position:relative;
  padding: 0 0 clamp(26px,4vw,44px);
}
.page-about .tl-item:last-child{
  padding-bottom:0;
}
.page-about .tl-item::before{
  content:"";
  position:absolute;
  left:-30px;
  top:8px;
  width:11px;
  height:11px;
  box-sizing:border-box;
  border-radius:50%;
  background: var(--ink-cabin);
  border:1px solid rgba(52,245,214,.55);
  transition: background var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before{
  background: var(--signal-cyan);
  border-color: var(--signal-cyan);
  box-shadow: 0 0 0 4px rgba(5,11,24,.92), 0 0 16px 3px rgba(52,245,214,.45);
}
.page-about .tl-year{
  display:inline-block;
  font-family: var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color: var(--signal-cyan);
  padding:3px 10px;
  border:1px solid rgba(52,245,214,.3);
  border-radius:999px;
  margin-bottom:10px;
}
.page-about .tl-title{
  font-family: var(--font-display);
  font-weight:600;
  font-size: clamp(18px,2.2vw,22px);
  line-height:1.45;
  color: var(--text-bright);
  margin:0 0 8px;
}
.page-about .tl-item p{
  margin:0;
  font-size:16px;
  line-height:1.78;
  color: var(--text-body);
  max-width: 60ch;
}

/* ---------- 三件事 ---------- */
.page-about .about-lines-grid{
  display:grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(14px,2.4vw,22px);
  margin-top: clamp(24px,3.5vw,40px);
}
.page-about .line-card{
  position:relative;
  padding: clamp(20px,3vw,28px);
  border:1px solid var(--ab-rule-soft);
  border-radius: var(--radius);
  background: var(--ab-glass);
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .line-card:hover{
  transform: translateY(-2px);
  border-color: rgba(52,245,214,.45);
  box-shadow: var(--shadow-panel);
}
.page-about .line-index{
  display:block;
  font-family: var(--font-mono);
  font-size:13px;
  letter-spacing:.16em;
  color: var(--signal-orange);
  margin-bottom:12px;
}
.page-about .line-card h3{
  font-family: var(--font-display);
  font-weight:600;
  font-size: clamp(18px,2vw,20px);
  line-height:1.45;
  color: var(--text-bright);
  margin:0 0 10px;
}
.page-about .line-card p{
  margin:0;
  font-size:16px;
  line-height:1.78;
  color: var(--text-body);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid{
  display:grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(24px,4vw,42px);
  align-items:start;
}
.page-about .about-lead-text{
  margin: clamp(14px,2vw,20px) 0 0;
  font-size:16px;
  line-height:1.8;
  color: var(--text-body);
  max-width: 60ch;
}
.page-about .team-roles{
  list-style:none;
  margin: clamp(22px,3vw,32px) 0 0;
  padding:1px;
  display:grid;
  grid-template-columns: minmax(0,1fr);
  gap:1px;
  background: var(--ab-rule-soft);
  border:1px solid var(--ab-rule-soft);
  border-radius: var(--radius);
  overflow:hidden;
}
.page-about .role-card{
  background: var(--ab-glass);
  padding: clamp(18px,2.6vw,26px);
  transition: background var(--ease);
}
.page-about .role-card:hover{
  background: linear-gradient(180deg, rgba(30,58,110,.78), rgba(10,23,48,.96));
}
.page-about .role-num{
  font-family: var(--font-mono);
  font-size: clamp(30px,4.2vw,42px);
  line-height:1;
  color: var(--text-bright);
}
.page-about .role-unit{
  font-size:13px;
  color: var(--text-muted);
  margin-left:6px;
}
.page-about .role-name{
  font-family: var(--font-ui);
  font-weight:700;
  font-size:16px;
  letter-spacing:.02em;
  color: var(--signal-cyan);
  margin:14px 0 8px;
}
.page-about .role-card p{
  margin:0;
  font-size:16px;
  line-height:1.75;
  color: var(--text-body);
}
.page-about .about-team-media{
  border-radius: var(--radius);
  overflow:hidden;
  margin:0;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage{
  display:grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(24px,4vw,44px);
  align-items:start;
}
.page-about .about-coverage-media{
  border-radius: var(--radius);
  overflow:hidden;
  margin:0;
}
.page-about .about-coverage-body p{
  margin: clamp(12px,2vw,18px) 0 0;
  font-size:16px;
  line-height:1.8;
  color: var(--text-body);
  max-width: 60ch;
}
.page-about .about-dotmap{
  display:block;
  width:100%;
  max-width: 340px;
  height:auto;
  margin: clamp(18px,3vw,26px) 0 0;
}
.page-about .about-dotmap circle{
  fill: var(--ink-lift);
  transition: fill var(--ease);
}
.page-about .about-dotmap .dm-group:nth-child(3) circle{
  fill: rgba(52,245,214,.55);
}
.page-about .about-dotmap .dm-group:nth-child(7) circle{
  fill: rgba(123,92,255,.65);
}
.page-about .about-dotmap .dm-group:hover circle{
  fill: var(--signal-cyan);
}
.page-about .coverage-readouts{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(120px,1fr));
  gap:1px;
  margin: clamp(22px,3.4vw,34px) 0 0;
  padding:0;
  background: var(--ab-rule-soft);
  border:1px solid var(--ab-rule-soft);
  border-radius: var(--radius-sm);
  overflow:hidden;
}
.page-about .coverage-readouts > div{
  background: rgba(10,23,48,.88);
  padding:16px 14px;
}
.page-about .coverage-readouts dt{
  margin:0;
  font-size:13px;
  line-height:1.5;
  color: var(--text-muted);
}
.page-about .coverage-readouts dd{
  margin:8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(20px,2.6vw,26px);
  line-height:1.05;
  color: var(--text-bright);
  display:flex;
  align-items:baseline;
  gap:2px;
}
.page-about .coverage-readouts .unit{
  font-family: var(--font-ui);
  font-size:13px;
  color: var(--signal-cyan);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-eco{
  padding-top: clamp(48px,7.5vw,90px);
}
.page-about .eco-panel{
  position:relative;
  border-radius: var(--radius);
  border:1px solid rgba(52,245,214,.22);
  background:
    radial-gradient(90% 120% at 88% 6%, rgba(123,92,255,.20), transparent 58%),
    radial-gradient(70% 100% at 4% 96%, rgba(52,245,214,.12), transparent 60%),
    linear-gradient(180deg, rgba(18,36,74,.72), rgba(10,23,48,.92));
  padding: clamp(24px,4vw,48px);
  box-shadow: 0 26px 64px -44px rgba(0,0,0,.96);
}
.page-about .eco-panel .eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:.18em;
  color: var(--signal-cyan);
  margin:0 0 clamp(10px,1.6vw,14px);
}
.page-about .eco-panel p{
  margin: clamp(14px,2vw,20px) 0 0;
  font-size:16px;
  line-height:1.8;
  color: var(--text-body);
  max-width: 66ch;
}
.page-about .eco-panel p a{
  color: var(--signal-cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(52,245,214,.35);
  transition: border-color var(--ease), color var(--ease);
}
.page-about .eco-panel p a:hover,
.page-about .eco-panel p a:focus-visible{
  color: var(--text-bright);
  border-bottom-color: var(--signal-orange);
}
.page-about .eco-figures{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(120px,1fr));
  gap:1px;
  margin: clamp(22px,3vw,32px) 0 0;
  padding:0;
  background: rgba(30,58,110,.45);
  border:1px solid rgba(30,58,110,.45);
  border-radius: var(--radius-sm);
  overflow:hidden;
}
.page-about .eco-figures > div{
  background: rgba(5,11,24,.55);
  padding:16px 14px;
}
.page-about .eco-figures dt{
  margin:0;
  font-size:13px;
  line-height:1.5;
  color: var(--text-muted);
}
.page-about .eco-figures dd{
  margin:8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(20px,2.6vw,26px);
  line-height:1.05;
  color: var(--text-bright);
  display:flex;
  align-items:baseline;
  gap:2px;
}
.page-about .eco-figures .unit{
  font-family: var(--font-ui);
  font-size:13px;
  color: var(--signal-orange);
}
.page-about .eco-panel .btn-row{
  margin-top: clamp(22px,3vw,32px);
}

/* ---------- 回到顶部 ---------- */
.page-about .about-top{
  position:fixed;
  right: clamp(14px,3vw,28px);
  bottom: clamp(14px,3vw,28px);
  z-index:20;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 15px;
  font-family: var(--font-ui);
  font-size:13px;
  line-height:1;
  color: var(--text-body);
  text-decoration:none;
  border:1px solid var(--ab-rule);
  border-radius:999px;
  background: rgba(10,23,48,.86);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: color var(--ease), border-color var(--ease);
}
.page-about .about-top::before{
  content:"↑";
  font-family: var(--font-mono);
  color: var(--signal-cyan);
}
.page-about .about-top:hover,
.page-about .about-top:focus-visible{
  color: var(--text-bright);
  border-color: rgba(52,245,214,.65);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px){
  .page-about .about-timeline-list{
    padding-left:42px;
  }
  .page-about .tl-item::before{
    left:-38px;
  }
}

@media (min-width: 760px){
  .page-about .hero-stats{
    grid-template-columns: repeat(4, minmax(0,1fr));
  }
  .page-about .team-roles{
    grid-template-columns: 1.3fr 1fr .9fr;
  }
}

@media (min-width: 900px){
  .page-about .about-lines-grid{
    grid-template-columns: 1.12fr .94fr .84fr;
    align-items:start;
  }
  .page-about .line-card:nth-child(2){
    margin-top:26px;
  }
  .page-about .line-card:nth-child(3){
    margin-top:52px;
  }
  .page-about .about-team-grid{
    grid-template-columns: minmax(0,1.24fr) minmax(0,.76fr);
  }
  .page-about .about-coverage{
    grid-template-columns: minmax(0,.82fr) minmax(0,1.18fr);
    align-items:center;
  }
  .page-about .about-dotmap{
    max-width: 380px;
  }
}

@media (min-width: 1080px){
  .page-about .about-hero{
    padding-bottom: clamp(40px,4.5vw,64px);
  }
  .page-about .about-timeline-list{
    padding-left:52px;
  }
  .page-about .tl-item::before{
    left:-48px;
  }
  .page-about .about-timeline-list::before{
    left:9px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .line-card,
  .page-about .tl-item::before,
  .page-about .about-dotmap circle{
    transition:none;
  }
  .page-about .line-card:hover{
    transform:none;
  }
}