.page-about{
  --about-rail:78px;
  --about-body-text:#C9E0D8;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-sans);
}

.page-about section[id]{
  scroll-margin-top:calc(var(--header-h) + 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:calc(var(--header-h) + 44px) 0 54px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(95,242,214,.13), transparent 62%),
    linear-gradient(180deg, #071712 0%, var(--ink) 78%);
}

.page-about .about-hero::before{
  content:"";
  position:absolute;
  z-index:0;
  top:-150px;
  right:-140px;
  width:min(720px,96vw);
  height:620px;
  background:linear-gradient(160deg, rgba(95,242,214,.16), rgba(11,31,25,0) 72%);
  clip-path:polygon(34% 0, 100% 0, 100% 74%, 0 100%);
  pointer-events:none;
}

.page-about .about-hero::after{
  content:"";
  position:absolute;
  z-index:0;
  inset:0;
  background-image:
    linear-gradient(to right, rgba(30,77,63,.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,77,63,.45) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(88% 72% at 72% 8%, #000 0%, transparent 78%);
  mask-image:radial-gradient(88% 72% at 72% 8%, #000 0%, transparent 78%);
  opacity:.75;
  pointer-events:none;
}

.page-about .about-hero-inner{
  position:relative;
  z-index:1;
}

.page-about .breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:26px;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  color:var(--muted);
}

.page-about .breadcrumb a{
  color:var(--cyan);
  text-decoration:none;
}

.page-about .breadcrumb a:hover{
  color:var(--cyan-soft);
  text-decoration:underline;
}

.page-about .eyebrow{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--orange-soft);
}

.page-about .about-hero h1{
  margin:0 0 22px;
  max-width:19ch;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2.05rem, 7.4vw, 4.1rem);
  line-height:1;
  letter-spacing:-.01em;
  color:var(--text);
  text-wrap:balance;
}

.page-about .about-lede{
  margin:0 0 34px;
  max-width:58ch;
  font-size:clamp(1rem, 1.9vw, 1.16rem);
  line-height:1.74;
  color:var(--about-body-text);
}

.page-about .hero-stats{
  display:grid;
  grid-template-columns:repeat(2, minmax(0,1fr));
  gap:1px;
  margin:0;
  padding:0;
  max-width:660px;
  list-style:none;
  background:var(--line);
  border:1px solid var(--line);
}

.page-about .hero-stats li{
  padding:18px 16px 16px;
  background:linear-gradient(180deg, rgba(18,51,42,.88), rgba(11,31,25,.95));
}

.page-about .stat-num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(1.55rem, 4vw, 2.05rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--cyan);
}

.page-about .stat-unit{
  margin-left:2px;
  font-size:.52em;
  color:var(--cyan-soft);
}

.page-about .stat-label{
  display:block;
  margin-top:9px;
  font-size:.76rem;
  letter-spacing:.05em;
  color:var(--muted);
}

/* ---------- 首屏锚点导航 ---------- */
.page-about .about-jump{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:32px;
}

.page-about .about-jump a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  font-size:.8rem;
  color:var(--text);
  text-decoration:none;
  border:1px solid var(--line);
  background:rgba(11,31,25,.72);
  transition:border-color .2s ease, color .2s ease, background .2s ease;
}

.page-about .about-jump a span{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.1em;
  color:var(--cyan);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible{
  border-color:var(--cyan);
  background:rgba(30,77,63,.78);
  color:var(--cyan-soft);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-section{
  position:relative;
  padding:clamp(42px, 6.5vw, 78px) 0;
  border-bottom:1px solid rgba(30,77,63,.5);
}

.page-about .about-section--alt{
  background:linear-gradient(180deg, rgba(11,31,25,.62), rgba(6,17,14,0) 72%);
}

.page-about .about-row{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:22px;
  align-items:start;
}

/* ---------- 竖排栏目条 ---------- */
.page-about .about-rail{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}

.page-about .rail-index{
  padding:3px 8px;
  font-weight:700;
  color:var(--cyan);
  border:1px solid var(--line);
  background:rgba(18,51,42,.75);
}

.page-about .rail-text{
  letter-spacing:.28em;
}

/* ---------- 正文 ---------- */
.page-about .about-body h2{
  margin:0 0 18px;
  max-width:24ch;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.45rem, 3.8vw, 2.3rem);
  line-height:1.1;
  color:var(--text);
  text-wrap:balance;
}

.page-about .about-body p{
  margin:0 0 16px;
  max-width:64ch;
  font-size:1rem;
  line-height:1.74;
  color:var(--about-body-text);
}

.page-about .about-body--narrow p{
  max-width:56ch;
}

.page-about .about-body strong{
  font-weight:600;
  color:var(--cyan-soft);
}

/* ---------- 图框 ---------- */
.page-about .about-figure{
  position:relative;
  margin:30px 0 0;
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--panel);
}

.page-about .about-figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
}

.page-about .about-figure figcaption{
  padding:12px 16px;
  border-top:1px solid var(--line);
  background:rgba(6,17,14,.72);
  font-size:.78rem;
  line-height:1.62;
  color:var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .plan-track{
  position:relative;
  display:grid;
  gap:18px;
  margin:28px 0 0;
  padding:0 0 0 26px;
  list-style:none;
}

.page-about .plan-track::before{
  content:"";
  position:absolute;
  left:7px;
  top:10px;
  bottom:10px;
  width:2px;
  background:linear-gradient(180deg, var(--cyan), rgba(30,77,63,.85) 58%, rgba(30,77,63,0));
}

.page-about .plan-node{
  position:relative;
  padding:15px 17px 15px 18px;
  border:1px solid rgba(30,77,63,.85);
  background:linear-gradient(135deg, rgba(18,51,42,.72), rgba(11,31,25,.62));
  transition:border-color .25s ease, background .25s ease, transform .25s ease;
}

.page-about .plan-node::before{
  content:"";
  position:absolute;
  left:-25px;
  top:23px;
  width:9px;
  height:9px;
  border-radius:50%;
  border:2px solid var(--line);
  background:var(--ink);
  transition:border-color .25s ease, box-shadow .25s ease;
}

.page-about .plan-node:hover,
.page-about .plan-node:focus-within{
  border-color:rgba(95,242,214,.6);
  background:linear-gradient(135deg, rgba(30,77,63,.85), rgba(11,31,25,.8));
  transform:translateX(3px);
}

.page-about .plan-node:hover::before{
  border-color:var(--cyan);
  box-shadow:0 0 0 4px rgba(95,242,214,.14);
}

.page-about .plan-node:last-child::before{
  border-color:var(--orange);
}

.page-about .plan-when{
  display:inline-block;
  margin-bottom:9px;
  padding:2px 8px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--cyan);
  border:1px solid rgba(95,242,214,.35);
  background:rgba(95,242,214,.08);
}

.page-about .plan-node:last-child .plan-when{
  color:var(--orange-soft);
  border-color:rgba(255,155,61,.4);
  background:rgba(255,155,61,.1);
}

.page-about .plan-node h3{
  margin:0 0 7px;
  font-size:1.02rem;
  font-weight:600;
  line-height:1.4;
  color:var(--text);
}

.page-about .plan-node p{
  margin:0;
  max-width:none;
  font-size:.9rem;
  line-height:1.66;
  color:var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:12px;
  margin:26px 0 0;
  padding:0;
  list-style:none;
}

.page-about .team-card{
  padding:20px 18px;
  border:1px solid rgba(30,77,63,.85);
  border-top:2px solid var(--cyan);
  background:linear-gradient(180deg, rgba(18,51,42,.6), rgba(11,31,25,.88));
  transition:transform .25s ease, border-color .25s ease;
}

.page-about .team-card:hover{
  transform:translateY(-3px);
  border-color:rgba(95,242,214,.55);
}

.page-about .team-code{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.18em;
  color:var(--cyan);
}

.page-about .team-card h3{
  margin:0 0 7px;
  font-size:1rem;
  font-weight:600;
  color:var(--text);
}

.page-about .team-card p{
  margin:0;
  max-width:none;
  font-size:.88rem;
  line-height:1.66;
  color:var(--muted);
}

/* ---------- 内容类型 ---------- */
.page-about .type-list{
  display:grid;
  gap:10px;
  margin:24px 0 4px;
  padding:0;
  list-style:none;
}

.page-about .type-item{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:14px 16px;
  border-left:2px solid var(--line);
  background:rgba(18,51,42,.42);
  transition:border-color .25s ease, background .25s ease;
}

.page-about .type-item:hover{
  border-left-color:var(--cyan);
  background:rgba(18,51,42,.72);
}

.page-about .type-key{
  padding-top:3px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--cyan);
}

.page-about .type-item h3{
  margin:0 0 5px;
  font-size:.96rem;
  font-weight:600;
  color:var(--text);
}

.page-about .type-item p{
  margin:0;
  max-width:none;
  font-size:.86rem;
  line-height:1.62;
  color:var(--muted);
}

/* ---------- 合作数字带 ---------- */
.page-about .partner-band{
  display:grid;
  grid-template-columns:repeat(2, minmax(0,1fr));
  gap:1px;
  margin-top:28px;
  border:1px solid var(--line);
  background:var(--line);
}

.page-about .partner-band > div{
  padding:18px 16px;
  background:linear-gradient(180deg, rgba(18,51,42,.82), rgba(11,31,25,.95));
}

.page-about .partner-num{
  display:block;
  font-family:var(--font-mono);
  font-size:1.5rem;
  font-weight:700;
  line-height:1;
  color:var(--cyan);
}

.page-about .partner-unit{
  font-size:.62em;
  color:var(--cyan-soft);
}

.page-about .partner-label{
  display:block;
  margin-top:8px;
  font-size:.78rem;
  line-height:1.55;
  color:var(--muted);
}

/* ---------- 入口卡片 ---------- */
.page-about .route-links{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:10px;
  margin:26px 0 0;
  padding:0;
  list-style:none;
}

.page-about .route-link{
  display:flex;
  flex-direction:column;
  gap:8px;
  height:100%;
  padding:20px 18px;
  text-decoration:none;
  border:1px solid var(--line);
  background:linear-gradient(150deg, rgba(18,51,42,.68), rgba(11,31,25,.92));
  transition:border-color .25s ease, background .25s ease, transform .25s ease;
}

.page-about .route-link:hover,
.page-about .route-link:focus-visible{
  border-color:var(--cyan);
  background:linear-gradient(150deg, rgba(30,77,63,.88), rgba(11,31,25,.96));
  transform:translateY(-3px);
}

.page-about .route-coord{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.18em;
  color:var(--cyan);
}

.page-about .route-name{
  font-family:var(--font-display);
  font-size:1.22rem;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--text);
}

.page-about .route-desc{
  font-size:.86rem;
  line-height:1.6;
  color:var(--muted);
}

/* ---------- 联系信息 ---------- */
.page-about .contact-strip{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:16px 20px;
  margin:30px 0 0;
  padding:24px 20px;
  border:1px solid var(--line);
  border-left:3px solid var(--cyan);
  background:rgba(11,31,25,.88);
}

.page-about .contact-strip dt{
  margin-bottom:6px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}

.page-about .contact-strip dd{
  margin:0;
  font-size:.95rem;
  line-height:1.56;
  color:var(--text);
  overflow-wrap:break-word;
  word-break:break-word;
}

.page-about .contact-note{
  margin-top:18px;
  max-width:62ch;
  font-size:.88rem;
  line-height:1.7;
  color:var(--muted);
}

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

  .page-about .type-list{
    grid-template-columns:repeat(2, minmax(0,1fr));
  }
}

@media (min-width:720px){
  .page-about .hero-stats{
    grid-template-columns:repeat(4, minmax(0,1fr));
  }

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

  .page-about .contact-strip{
    grid-template-columns:repeat(2, minmax(0,1fr));
  }
}

@media (min-width:880px){
  .page-about .route-links{
    grid-template-columns:repeat(3, minmax(0,1fr));
  }

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

@media (min-width:920px){
  .page-about .about-row{
    grid-template-columns:var(--about-rail) minmax(0,1fr);
    gap:clamp(28px, 4vw, 56px);
  }

  .page-about .about-rail{
    position:sticky;
    top:calc(var(--header-h) + 34px);
    flex-direction:column;
    align-items:flex-start;
    gap:14px;
    padding:6px 0 0 14px;
    border-left:1px solid var(--line);
  }

  .page-about .rail-text{
    writing-mode:vertical-rl;
    text-orientation:mixed;
    font-size:.68rem;
    letter-spacing:.4em;
  }

  .page-about .about-hero h1{
    max-width:17ch;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .plan-node,
  .page-about .team-card,
  .page-about .route-link,
  .page-about .about-jump a{
    transition:none;
  }

  .page-about .plan-node:hover,
  .page-about .plan-node:focus-within,
  .page-about .team-card:hover,
  .page-about .route-link:hover,
  .page-about .route-link:focus-visible{
    transform:none;
  }
}
<<<END>>>