.page-about{
  --about-index:168px;
  --about-card:var(--ink-800);
}

/* 首屏 */
.page-about .about-hero{
  position:relative;
  padding-block:26px 10px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(90% 80% at 8% 0%, rgba(184,255,61,.09), transparent 62%),
    linear-gradient(180deg, rgba(16,40,63,.62) 0%, rgba(5,13,24,0) 82%);
}
.page-about .about-hero__inner{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:28px;
  align-items:start;
  padding-bottom:34px;
}
.page-about .breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--fg-dim);
}
.page-about .breadcrumb a.breadcrumb__item{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),color var(--ease);
}
.page-about .breadcrumb a.breadcrumb__item:hover{
  color:var(--lime);
  border-bottom-color:var(--lime);
}
.page-about .about-hero h1{
  margin:10px 0 0;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(32px,7.4vw,60px);
  line-height:1.06;
  letter-spacing:.01em;
  max-width:18ch;
}
.page-about .about-hero__lead{
  margin:16px 0 0;
  max-width:54ch;
  font-size:15px;
  line-height:1.8;
  color:var(--fg-dim);
}
.page-about .about-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.page-about .about-stats{
  list-style:none;
  margin:26px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
}
.page-about .about-stat{
  border:1px solid var(--line);
  border-radius:16px;
  background:rgba(16,40,63,.66);
  padding:12px 14px;
  transition:border-color var(--ease),background var(--ease);
}
.page-about .about-stat:hover{
  border-color:var(--lime);
  background:rgba(16,40,63,.92);
}
.page-about .about-stat__num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(19px,3.8vw,26px);
  line-height:1.2;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}
.page-about .about-stat__label{
  display:block;
  margin-top:4px;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--fg-dim);
}
.page-about .about-hero__figure{
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  margin:0;
}
.page-about figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-hero__figure img{
  aspect-ratio:3/2;
}
.page-about .figure__caption{
  padding:10px 14px 12px;
  font-size:12px;
  line-height:1.6;
  color:var(--fg-dim);
  border-top:1px solid var(--line);
  background:rgba(10,26,43,.9);
}

/* 正文骨架：窄索引 + 档案列 */
.page-about .about-body{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:30px;
  padding-block:38px 68px;
}
.page-about .about-index{
  min-width:0;
}
.page-about .about-index__title{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--fg-dim);
}
.page-about .about-index__list{
  list-style:none;
  margin:0;
  padding:0 0 6px;
  display:flex;
  gap:8px;
  overflow-x:auto;
  scrollbar-width:thin;
}
.page-about .about-index__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  color:var(--fg-dim);
  font-size:13px;
  text-decoration:none;
  white-space:nowrap;
  background:rgba(10,26,43,.7);
  transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible{
  border-color:var(--lime);
  color:var(--fg);
  background:rgba(184,255,61,.08);
}
.page-about .about-index__num{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}

.page-about .doc-section{
  scroll-margin-top:96px;
}
.page-about .doc-section + .doc-section{
  margin-top:44px;
  padding-top:40px;
  border-top:1px solid var(--line);
}
.page-about .sec-head{
  display:flex;
  align-items:flex-start;
  gap:14px;
  margin-bottom:18px;
}
.page-about .sec-head__num{
  flex:none;
  font-family:var(--font-mono);
  font-size:clamp(26px,5.4vw,38px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
  padding-top:2px;
}
.page-about .sec-head h2{
  margin:0;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(23px,4.6vw,34px);
  line-height:1.14;
}
.page-about .sec-head__sub{
  margin:8px 0 0;
  font-size:13px;
  line-height:1.65;
  color:var(--fg-dim);
}
.page-about .doc-section p{
  margin:0 0 14px;
  font-size:15px;
  line-height:1.8;
  color:var(--fg-dim);
}
.page-about .doc-section p:last-child{
  margin-bottom:0;
}
.page-about .doc-section h3{
  margin:0 0 8px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:19px;
  line-height:1.25;
  color:var(--fg);
}

/* 01 定位牌 */
.page-about .origin-plaque{
  margin-top:22px;
  border:1px solid var(--line);
  border-left:3px solid var(--lime);
  border-radius:8px var(--r-module) var(--r-module) 8px;
  background:rgba(16,40,63,.62);
  padding:18px 20px;
}
.page-about .origin-plaque__text{
  margin:10px 0 0;
  font-family:var(--font-display);
  font-size:clamp(18px,3.4vw,23px);
  line-height:1.45;
  color:var(--fg);
}

/* 02 双路径 */
.page-about .paths{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:14px;
}
.page-about .path-card{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-module);
  background:var(--ink-700);
  padding:20px;
  transition:border-color var(--ease),transform var(--ease);
}
.page-about .path-card::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:3px;
  background:var(--lime);
}
.page-about .path-card--pc::before{
  background:var(--orange);
}
.page-about .path-card:hover{
  border-color:var(--lime);
  transform:translateY(-2px);
}
.page-about .path-card--pc:hover{
  border-color:var(--orange);
}
.page-about .path-card h3{
  margin:12px 0 0;
  font-family:var(--font-display);
  font-size:21px;
}
.page-about .path-card__list{
  list-style:none;
  margin:14px 0 0;
  padding:0;
  display:grid;
  gap:9px;
}
.page-about .path-card__list li{
  position:relative;
  padding-left:16px;
  font-size:14px;
  line-height:1.68;
  color:var(--fg-dim);
}
.page-about .path-card__list li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:8px;
  height:1px;
  background:var(--lime);
}
.page-about .path-card--pc .path-card__list li::before{
  background:var(--orange);
}

.page-about .paths-figure{
  margin:22px 0 0;
  border:1px solid var(--line);
  border-radius:var(--r-img);
  overflow:hidden;
}
.page-about .paths-figure img{
  aspect-ratio:3/2;
}
.page-about .paths-svg{
  display:block;
  width:100%;
  height:auto;
  margin:16px 0 24px;
  padding:6px 0;
}

/* 02 时间线 */
.page-about .tl{
  list-style:none;
  margin:0;
  padding:0;
}
.page-about .tl__item{
  display:grid;
  grid-template-columns:62px minmax(0,1fr);
  gap:12px;
  padding-bottom:14px;
}
.page-about .tl__year{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--orange-soft);
  text-align:right;
  padding-top:18px;
  font-variant-numeric:tabular-nums;
}
.page-about .tl__card{
  position:relative;
  border:1px solid var(--line);
  border-left:2px solid var(--line);
  border-radius:16px;
  background:var(--about-card);
  padding:16px 18px 18px;
  transition:border-color var(--ease),transform var(--ease),background var(--ease);
}
.page-about .tl__card::before{
  content:"";
  position:absolute;
  left:-7px;
  top:22px;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 4px rgba(184,255,61,.14);
}
.page-about .tl__item:hover .tl__card,
.page-about .tl__card:focus-within{
  border-color:var(--lime);
  border-left-color:var(--lime);
  background:rgba(16,40,63,.95);
  transform:translateX(2px);
}
.page-about .tl__card h3{
  margin:10px 0 6px;
  font-family:var(--font-display);
  font-size:19px;
}
.page-about .tl__card p{
  margin:0;
  font-size:14px;
  line-height:1.72;
  color:var(--fg-dim);
}

/* 03 团队 */
.page-about .team-figure{
  margin:20px 0 22px;
  border:1px solid var(--line);
  border-radius:var(--r-img);
  overflow:hidden;
}
.page-about .team-figure img{
  aspect-ratio:10/7;
}
.page-about .team-grid{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:12px;
}
.page-about .team-card{
  border:1px solid var(--line);
  border-radius:18px;
  background:rgba(16,40,63,.72);
  padding:18px;
  transition:border-color var(--ease),transform var(--ease),background var(--ease);
}
.page-about .team-card:hover{
  border-color:var(--lime);
  background:rgba(16,40,63,.95);
  transform:translateY(-2px);
}
.page-about .team-card__tag{
  display:inline-block;
  padding:3px 10px;
  border:1px solid var(--lime);
  border-radius:var(--r-pill);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--lime);
}
.page-about .doc-section .team-card h3{
  margin:12px 0 8px;
}
.page-about .doc-section .team-card p{
  margin:0;
  font-size:14px;
  line-height:1.72;
}

/* 04 流程与节奏 */
.page-about .flow{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:10px;
}
.page-about .flow__step{
  display:grid;
  grid-template-columns:36px minmax(0,1fr);
  gap:14px;
  align-items:start;
  border:1px solid var(--line);
  border-radius:16px;
  background:var(--ink-800);
  padding:16px;
  transition:border-color var(--ease);
}
.page-about .flow__step:hover{
  border-color:var(--cyan);
}
.page-about .flow__num{
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  border:1px solid var(--lime);
  border-radius:50%;
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--lime);
}
.page-about .doc-section .flow__step h3{
  margin:4px 0 6px;
  font-size:18px;
}
.page-about .doc-section .flow__step p{
  margin:0;
  font-size:14px;
  line-height:1.7;
}
.page-about .cadence{
  list-style:none;
  margin:20px 0 0;
  padding:0;
  display:grid;
  gap:12px;
}
.page-about .cadence__item{
  border-left:2px solid var(--orange);
  padding:2px 0 2px 14px;
}
.page-about .doc-section .cadence__item h3{
  margin:0 0 5px;
  font-size:17px;
  color:var(--orange-soft);
}
.page-about .doc-section .cadence__item p{
  margin:0;
  font-size:14px;
  line-height:1.7;
}

/* 05 场景 */
.page-about .scene-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:12px;
}
.page-about .scene{
  position:relative;
  border:1px solid var(--line);
  border-radius:18px;
  background:linear-gradient(160deg, rgba(16,40,63,.95), rgba(10,26,43,.7));
  padding:18px 18px 18px 22px;
  transition:border-color var(--ease),transform var(--ease);
}
.page-about .scene::before{
  content:"";
  position:absolute;
  left:0;
  top:18px;
  bottom:18px;
  width:2px;
  border-radius:2px;
  background:var(--lime);
}
.page-about .scene:hover{
  border-color:var(--lime);
  transform:translateY(-2px);
}
.page-about .doc-section .scene h3{
  margin:0 0 6px;
  font-size:18px;
}
.page-about .doc-section .scene p{
  margin:0;
  font-size:14px;
  line-height:1.72;
}

/* 06 合作 */
.page-about .coop{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:22px;
}
.page-about .coop__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:20px;
}
.page-about .coop__stats{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
}
.page-about .coop__stat{
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  background:rgba(10,26,43,.85);
  padding:16px 14px;
  text-align:center;
}
.page-about .coop__stat--alt{
  border-color:rgba(255,157,77,.55);
  background:rgba(255,157,77,.08);
}
.page-about .coop__num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(24px,5vw,32px);
  line-height:1.1;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}
.page-about .coop__stat--alt .coop__num{
  color:var(--orange);
}
.page-about .coop__label{
  display:block;
  margin-top:6px;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--fg-dim);
}
.page-about .coop__stats li:last-child{
  grid-column:1 / -1;
}

@media (min-width:640px){
  .page-about .about-stats{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .paths{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
  }
  .page-about .team-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .scene-list{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .coop__stats{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .page-about .coop__stats li:last-child{
    grid-column:auto;
  }
  .page-about .tl__item{
    grid-template-columns:76px minmax(0,1fr);
    gap:16px;
  }
  .page-about .tl__year{
    font-size:14px;
  }
}

@media (min-width:1024px){
  .page-about .about-hero{
    padding-block:34px 12px;
  }
  .page-about .about-hero__inner{
    grid-template-columns:minmax(0,1.32fr) minmax(0,1fr);
    gap:48px;
    padding-bottom:44px;
  }
  .page-about .about-body{
    grid-template-columns:var(--about-index) minmax(0,1fr);
    gap:56px;
    padding-block:52px 92px;
  }
  .page-about .about-index{
    position:sticky;
    top:92px;
    align-self:start;
  }
  .page-about .about-index__list{
    flex-direction:column;
    overflow:visible;
    padding-bottom:0;
  }
  .page-about .about-index__link{
    width:100%;
    justify-content:flex-start;
    border-radius:12px;
  }
  .page-about .coop{
    grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);
    align-items:start;
    gap:32px;
  }
  .page-about .doc-section + .doc-section{
    margin-top:56px;
    padding-top:52px;
  }
  .page-about .paths-svg{
    max-width:520px;
    margin-left:0;
    margin-right:auto;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about .about-stat,
  .page-about .about-index__link,
  .page-about .path-card,
  .page-about .tl__card,
  .page-about .team-card,
  .page-about .flow__step,
  .page-about .scene{
    transition:none;
  }
  .page-about .path-card:hover,
  .page-about .team-card:hover,
  .page-about .scene:hover,
  .page-about .tl__item:hover .tl__card{
    transform:none;
  }
}