.page-about{
  --about-rail: 92px;
  --about-gap: clamp(18px, 3vw, 40px);
  --about-space: clamp(42px, 7vw, 92px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs{
  margin-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  overflow: clip;
  padding: clamp(26px, 5vw, 56px) 0 clamp(30px, 5vw, 60px);
}
.page-about .about-hero::after{
  content:"";
  position:absolute;
  top:-18%;
  right:-6%;
  width: min(560px, 78vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(33,243,214,.18), rgba(61,139,255,.08) 46%, transparent 72%);
  pointer-events:none;
  z-index:0;
}
.page-about .about-hero > *{
  position: relative;
  z-index: 1;
}
.page-about .eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 18px;
}
.page-about h1{
  font-family: var(--font-display);
  font-size: clamp(42px, 9.6vw, 112px);
  line-height: .94;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--paper);
  margin: 0 0 clamp(22px, 4vw, 38px);
}
.page-about .hero-em{
  color: var(--cyan);
  text-shadow: 0 0 34px rgba(33,243,214,.28);
}
.page-about .hero-grid{
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}
.page-about .hero-grid .lede{
  max-width: 46ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  margin: 0;
}
.page-about .hero-metrics{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
}
.page-about .hero-metrics li{
  border-top: 1px solid var(--line);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.page-about .metric-num{
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  color: var(--paper);
  letter-spacing: -.02em;
}
.page-about .metric-label{
  font-size: 13px;
  color: var(--mist);
  line-height: 1.5;
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter{
  position: relative;
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: var(--about-gap);
  padding: var(--about-space) 0;
}
.page-about .chapter::before{
  content:"";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(33,243,214,.85), rgba(33,243,214,.12) 58%, transparent);
}
.page-about .chapter-rail{
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.page-about .chapter-num{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(48px, 9vw, 96px);
  line-height: .8;
  letter-spacing: -.03em;
  color: rgba(33,243,214,.26);
}
@supports (-webkit-text-stroke: 1px #000){
  .page-about .chapter-num{
    color: transparent;
    -webkit-text-stroke: 1px rgba(33,243,214,.5);
  }
}
.page-about .chapter-year{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--mist);
  white-space: nowrap;
}
.page-about .chapter-body{
  min-width: 0;
}
.page-about .section-head{
  margin-bottom: clamp(20px, 3vw, 32px);
}
.page-about .section-title{
  font-family: var(--font-display);
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
  margin: 0 0 10px;
}
.page-about .section-sub{
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
  max-width: 40ch;
}

/* ---------- 图文两栏 ---------- */
.page-about .chapter-cols{
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}
.page-about .media-frame{
  margin: 0;
}
.page-about .media-frame img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-m);
}
.page-about .media-caption{
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}
.page-about .media-frame--scan{
  position: relative;
}
.page-about .media-frame--scan::after{
  content:"";
  position: absolute;
  inset: 0;
  border-radius: var(--r-m);
  border: 1px solid rgba(33,243,214,.18);
  background: linear-gradient(180deg, rgba(6,26,46,0) 55%, rgba(6,26,46,.42));
  pointer-events: none;
}
.page-about .about-text p{
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: #C6D8E6;
}
.page-about .about-text p:last-child{
  margin-bottom: 0;
}
.page-about .about-text--wide{
  max-width: 68ch;
}

/* ---------- 时间线 ---------- */
.page-about .timeline{
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line);
}
.page-about .tl-item{
  position: relative;
  padding: 0 0 22px 22px;
}
.page-about .tl-item:last-child{
  padding-bottom: 0;
}
.page-about .tl-item::before{
  content:"";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(33,243,214,.12);
}
.page-about .tl-year{
  display: block;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
  margin-bottom: 4px;
}
.page-about .tl-item p{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队展开项 ---------- */
.page-about .tree{
  display: grid;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 32px);
}
.page-about .tree-item{
  background: var(--hull);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  padding: 0 16px;
}
.page-about .tree-item summary{
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .tree-item summary::-webkit-details-marker{
  display: none;
}
.page-about .tree-item summary::after{
  content:"+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}
.page-about .tree-item[open] summary::after{
  content:"-";
}
.page-about .tree-item[open] summary{
  color: var(--cyan);
}
.page-about .tree-idx{
  font-size: 12px;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
}
.page-about .tree-item p{
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  border-left: 2px solid rgba(33,243,214,.35);
  padding-left: 12px;
}

/* ---------- 导航示意 ---------- */
.page-about .nav-demo{
  background: var(--hull);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-l);
  padding: clamp(16px, 3vw, 26px);
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-about .nav-row{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-radius: var(--r-m);
  background: rgba(6,26,46,.55);
  border: 1px solid var(--line-soft);
}
.page-about .nav-row--hot{
  border-color: rgba(33,243,214,.38);
  background: rgba(33,243,214,.06);
}
.page-about .nav-row-label{
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
  width: 100%;
}
.page-about .nav-chip{
  font-size: 13px;
  line-height: 1;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(143,166,184,.12);
  color: #C6D8E6;
  white-space: nowrap;
}
.page-about .nav-chip--hot{
  background: rgba(33,243,214,.16);
  color: var(--ice);
}
.page-about .nav-chip--coral{
  background: rgba(255,107,74,.18);
  color: #FFB6A4;
}
.page-about .nav-demo-note{
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 数据条 ---------- */
.page-about .stat-strip{
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}
.page-about .stat-cell{
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--hull);
  border-radius: var(--r-m);
  border-left: 2px solid var(--cyan);
}
.page-about .stat-num{
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--cyan);
}
.page-about .stat-text{
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 广西地图 ---------- */
.page-about .geo-layout{
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-bottom: clamp(24px, 4vw, 40px);
}
.page-about .geo-panel{
  background: var(--hull);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-l);
  padding: clamp(14px, 3vw, 26px);
}
.page-about .geo-map{
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
  margin: 0 auto clamp(14px, 2vw, 20px);
  overflow: visible;
}
.page-about .geo-shape{
  fill: rgba(33,243,214,.05);
  stroke: rgba(33,243,214,.3);
  stroke-width: 1.2;
  stroke-linejoin: round;
}
.page-about .geo-dot circle{
  fill: var(--cyan);
  opacity: .8;
  transition: fill .2s var(--ease), r .2s var(--ease), opacity .2s var(--ease);
}
.page-about .geo-dot:hover circle{
  fill: var(--coral);
  opacity: 1;
  r: 7;
}
.page-about .geo-cities{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 8px 10px;
}
.page-about .geo-cities li{
  position: relative;
  padding-left: 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  min-width: 0;
}
.page-about .geo-cities li::before{
  content:"";
  position: absolute;
  left: 0;
  top: .55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(33,243,214,.6);
}
.page-about .geo-notes p{
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: #C6D8E6;
}
.page-about .geo-notes p:last-child{
  margin-bottom: 0;
}
.page-about .media-frame--wide{
  margin-top: clamp(6px, 2vw, 16px);
}

/* ---------- 版本节点 ---------- */
.page-about .versions{
  display: grid;
  gap: 14px;
}
.page-about .version-card{
  padding: 20px 0 0;
  border-top: 2px solid rgba(33,243,214,.55);
}
.page-about .version-year{
  display: block;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
  margin-bottom: 6px;
}
.page-about .version-card h3{
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.2;
  font-weight: 800;
  color: var(--paper);
}
.page-about .version-card p{
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta{
  margin-top: clamp(34px, 5vw, 64px);
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--r-l);
  background:
    radial-gradient(circle at 88% 10%, rgba(33,243,214,.18), transparent 58%),
    linear-gradient(140deg, var(--hull), var(--deep));
  border: 1px solid var(--line-soft);
}
.page-about .about-cta h2{
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.15;
  font-weight: 800;
  color: var(--paper);
}
.page-about .cta-links{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .cta-links a{
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  grid-template-areas:
    "label arrow"
    "desc arrow";
  align-items: center;
  gap: 4px 14px;
  padding: 16px 18px;
  border-radius: var(--r-m);
  background: rgba(6,26,46,.62);
  border: 1px solid var(--line-soft);
  text-decoration: none;
  transition: transform .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}
.page-about .cta-links a:hover,
.page-about .cta-links a:focus-visible{
  transform: translateY(-3px);
  border-color: rgba(33,243,214,.5);
  background: rgba(33,243,214,.08);
}
.page-about .cta-label{
  grid-area: label;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .cta-desc{
  grid-area: desc;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}
.page-about .cta-arrow{
  grid-area: arrow;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 700px){
  .page-about .hero-metrics{
    grid-template-columns: repeat(4, minmax(0,1fr));
  }
  .page-about .tree{
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
  .page-about .stat-strip{
    grid-template-columns: repeat(3, minmax(0,1fr));
  }
  .page-about .versions{
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: 18px;
  }
  .page-about .geo-cities{
    grid-template-columns: repeat(4, minmax(0,1fr));
  }
  .page-about .cta-links{
    grid-template-columns: repeat(3, minmax(0,1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px){
  .page-about .hero-grid{
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }
  .page-about .chapter{
    grid-template-columns: var(--about-rail) minmax(0,1fr);
    gap: clamp(22px, 3.4vw, 48px);
  }
  .page-about .chapter-rail{
    position: sticky;
    top: 108px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }
  .page-about .chapter-year{
    writing-mode: vertical-rl;
    letter-spacing: .3em;
    padding-top: 4px;
  }
  .page-about .chapter-cols{
    grid-template-columns: 1.05fr 1fr;
  }
  .page-about .geo-layout{
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
  }
  .page-about .geo-map{
    max-width: none;
  }
}

@media (min-width: 1100px){
  .page-about .chapter-cols{
    grid-template-columns: 1.1fr 1fr;
    gap: clamp(28px, 3.6vw, 52px);
  }
}
<<<END>>>