.page-about{
  --about-line-gap: clamp(1.5rem, 2.5vw, 2.5rem);
  background: var(--night);
  background-image:
    linear-gradient(135deg, rgba(30,90,153,0.25) 0%, rgba(11,31,58,0) 58%),
    radial-gradient(circle at 85% 12%, rgba(57,255,20,0.08) 0%, transparent 26%),
    radial-gradient(circle at 10% 74%, rgba(255,106,0,0.1) 0%, transparent 22%);
}
.page-about .container{
  max-width: var(--w-max);
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.page-about .section-label{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--orange);
  border-left: 3px solid var(--orange);
  padding-left: 0.8rem;
  margin-bottom: 1.2rem;
  text-transform: uppercase;
}
.page-about h1,
.page-about h2,
.page-about h3{
  font-family: var(--font-head);
  font-weight: 400;
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--cream);
}
.page-about h1{
  font-size: clamp(2.25rem, 5.5vw, 4.4rem);
  max-width: 15em;
  margin-bottom: 1.4rem;
}
.page-about h2{
  font-size: clamp(1.8rem, 3.4vw, 2.9rem);
  margin-bottom: 1.4rem;
}
.page-about h3{
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  margin-bottom: 0.7rem;
}
.page-about p{
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--rock);
}
.page-about .mono-highlight{
  font-family: var(--font-mono);
  color: var(--neon);
  letter-spacing: 0.06em;
}

/* 面包屑 */
.page-about .breadcrumbs{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.8rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--rock);
}
.page-about .breadcrumbs a{
  color: var(--rock);
  text-decoration: none;
  transition: color 0.24s ease;
}
.page-about .breadcrumbs a:hover{
  color: var(--neon);
}
.page-about .crumb-sep{
  color: var(--signal);
}
.page-about .crumb-current{
  color: var(--cream);
}

/* 首屏 */
.page-about .about-hero{
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(112deg, rgba(11,31,58,0.96) 0%, rgba(11,31,58,0.88) 45%, rgba(20,52,92,0.82) 100%),
    linear-gradient(45deg, transparent 47%, rgba(255,106,0,0.12) 47%, rgba(255,106,0,0.12) 48%, transparent 48%),
    linear-gradient(45deg, transparent 47%, rgba(255,106,0,0.05) 47%, rgba(255,106,0,0.05) 49%, transparent 49%);
  background-size: auto, 26px 26px, 34px 34px;
  padding: clamp(3rem, 8vw, 8rem) 0 clamp(3.4rem, 7vw, 6.5rem);
}
.page-about .about-hero::before{
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(57,255,20,0.55) 0 2px, transparent 2px 100%),
    linear-gradient(0deg, rgba(30,90,153,0.18) 0 1px, transparent 1px 100%);
  background-size: 90px 90px;
  mask-image: linear-gradient(90deg, transparent 26%, #000 74%);
  pointer-events: none;
}
.page-about .about-hero-inner{
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.6rem;
}
.page-about .about-hero-copy{
  max-width: 720px;
}
.page-about .about-hero-lead{
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.85;
  color: var(--cream);
  opacity: 0.9;
  max-width: 30em;
  margin-bottom: 2.2rem;
}
.page-about .about-hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.page-about .about-hero-aside{
  position: absolute;
  right: var(--gutter);
  bottom: 0;
  width: 150px;
  text-align: right;
  pointer-events: none;
  opacity: 0.92;
}
.page-about .hero-caption-mono{
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--neon);
  border-bottom: 1px solid rgba(57,255,20,0.45);
  padding-bottom: 0.4rem;
  display: inline-block;
}
.page-about .hero-caption-line{
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--rock);
  margin-top: 0.7rem;
}
.page-about .hero-caption-num{
  font-family: var(--font-head);
  font-size: clamp(4rem, 8vw, 6rem);
  line-height: 1;
  color: var(--orange);
  text-shadow: 0 0 24px rgba(255,106,0,0.4);
  margin-top: 0.9rem;
}
.page-about .hero-caption-sub{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.38em;
  color: var(--rock);
  text-transform: uppercase;
}

/* 通用按钮（作用域内覆写共享类样式） */
.page-about .btn{
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0;
  transition: all 0.22s ease;
}
.page-about .btn-orange{
  background: var(--orange);
  color: var(--night);
  border: 2px solid var(--orange);
}
.page-about .btn-orange:hover{
  background: #d85e00;
  border-color: #d85e00;
  box-shadow: 0 0 18px rgba(255,106,0,0.5);
  transform: translateY(-2px);
}
.page-about .btn-ghost{
  background: transparent;
  color: var(--neon);
  border: 2px solid var(--neon);
}
.page-about .btn-ghost:hover{
  background: rgba(57,255,20,0.12);
  box-shadow: 0 0 14px rgba(57,255,20,0.3);
  transform: translateY(-2px);
}
.page-about .btn-arrow-sym{
  display: inline-block;
  transition: transform 0.22s ease;
}
.page-about .btn:hover .btn-arrow-sym{
  transform: translateX(4px);
}

/* 区块通用 */
.page-about .section-deep{
  background: var(--deep);
  padding: clamp(3.2rem, 7vw, 6rem) 0;
}
.page-about .section-dark{
  background: var(--night);
}

/* 定位区 */
.page-about .about-position-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  position: relative;
}
.page-about .about-position-grid::before{
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--orange) 0%, transparent 100%);
  opacity: 0.8;
}
.page-about .about-position-main{
  max-width: 820px;
}
.page-about .about-position-main p{
  color: var(--rock);
  margin-bottom: 1.1rem;
}
.page-about .about-position-main strong{
  color: var(--cream);
  font-weight: 600;
}
.page-about .about-position-metrics{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2.2rem;
  border-top: 1px solid rgba(138,155,168,0.28);
  padding-top: 1.8rem;
}
.page-about .about-metric-num{
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--neon);
  line-height: 1.1;
  margin-bottom: 0.4rem;
}
.page-about .about-metric-label{
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--rock);
  text-transform: uppercase;
}

/* 发展历程区 */
.page-about .about-journey{
  background: var(--night);
  padding: clamp(3.2rem, 7vw, 6rem) 0;
}
.page-about .about-journey .section-head{
  margin-bottom: 2rem;
}
.page-about .about-journey-img{
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid rgba(30,90,153,0.45);
  border-radius: 2px;
  margin-bottom: 2.6rem;
}
.page-about .about-timeline{
  position: relative;
  display: grid;
  gap: 0;
  margin-top: 0.4rem;
}
.page-about .about-timeline::before{
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0.8rem;
  width: 2px;
  background: var(--moss);
  opacity: 0.65;
}
.page-about .timeline-entry{
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 1.4rem;
  align-items: start;
  padding: 0.4rem 0 2rem 2.1rem;
}
.page-about .timeline-entry::before{
  content: '';
  position: absolute;
  left: 0.4rem;
  top: 1.05rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--clay);
  border: 2px solid var(--night);
  box-shadow: 0 0 0 2px rgba(226,114,91,0.4);
}
.page-about .timeline-year{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
  min-width: 6.2rem;
  padding-top: 0.4rem;
}
.page-about .timeline-body{
  background: rgba(20,52,92,0.34);
  border-left: 2px solid rgba(30,90,153,0.55);
  padding: 1rem 1.2rem;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.page-about .timeline-body:hover{
  border-left-color: var(--neon);
  background: rgba(20,52,92,0.58);
  transform: translateX(3px);
}
.page-about .timeline-body h3{
  margin-bottom: 0.5rem;
  color: var(--cream);
}
.page-about .timeline-body p{
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--rock);
  margin: 0;
}

/* 服务能力区 */
.page-about .about-capability{
  background:
    linear-gradient(158deg, rgba(11,31,58,0.96) 0%, rgba(20,52,92,0.94) 56%, rgba(30,90,153,0.92) 100%);
  position: relative;
  overflow: hidden;
}
.page-about .about-capability::after{
  content: 'DATA GRID';
  position: absolute;
  right: -2.6rem;
  bottom: -1.4rem;
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6vw, 5rem);
  letter-spacing: 0.1em;
  color: rgba(57,255,20,0.05);
  white-space: nowrap;
  pointer-events: none;
  line-height: 1;
}
.page-about .about-capability-head{
  margin-bottom: 2.4rem;
}
.page-about .about-capability-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.6rem;
  align-items: center;
  position: relative;
  z-index: 2;
}
.page-about .about-capability-svg{
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .about-capability-svg svg{
  width: min(420px, 100%);
  height: auto;
}
.page-about .about-capability-list{
  display: grid;
  gap: 1rem;
}
.page-about .capability-node{
  background: rgba(11,31,58,0.5);
  border: 1px solid rgba(30,90,153,0.6);
  border-left: 4px solid var(--signal);
  padding: 1.3rem 1.3rem 1.2rem;
  cursor: default;
  transition: border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, transform 0.22s ease;
}
.page-about .capability-node:hover,
.page-about .capability-node:focus-visible{
  border-left-color: var(--neon);
  border-color: rgba(57,255,20,0.65);
  background: rgba(20,52,92,0.72);
  box-shadow: 0 0 16px rgba(57,255,20,0.16);
  transform: translateY(-2px);
  outline: none;
}
.page-about .capability-node-title{
  font-family: var(--font-head);
  font-size: 1.28rem;
  color: var(--cream);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}
.page-about .node-dot{
  width: 0.88rem;
  height: 0.88rem;
  background: var(--orange);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  display: inline-block;
}
.page-about .capability-node-text{
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--rock);
  margin: 0;
}
.page-about .about-capability-img{
  display: block;
  width: min(900px, 100%);
  height: auto;
  margin: 2.6rem auto 0;
  border: 1px solid rgba(30,90,153,0.55);
}

/* 组织与协作区 */
.page-about .about-org{
  background: var(--cream);
  padding: clamp(3.2rem, 7vw, 6rem) 0;
}
.page-about .about-org .section-label{
  color: var(--clay);
  border-left-color: var(--clay);
}
.page-about .about-org h2,
.page-about .about-org h3{
  color: var(--night);
}
.page-about .about-org p{
  color: #3d4754;
}
.page-about .about-org-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2.4rem;
}
.page-about .about-org-copy{
  max-width: 640px;
}
.page-about .about-org-copy p{
  margin-bottom: 1.1rem;
}
.page-about .about-org-illus{
  border: 2px solid var(--night);
  padding: 0.7rem;
  background: var(--cream);
  box-shadow: 8px 8px 0 var(--deep);
}
.page-about .about-org-illus img{
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-org-cols{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.4rem;
  border-top: 1px solid rgba(122,132,80,0.45);
  padding-top: 2.2rem;
}
.page-about .org-col{
  background: var(--cream);
  border: 1px solid rgba(20,52,92,0.28);
  border-top: 4px solid var(--moss);
  padding: 1.4rem 1.3rem 1.2rem;
  transition: box-shadow 0.22s ease, transform 0.22s ease;
}
.page-about .org-col:hover{
  box-shadow: 0 8px 22px rgba(11,31,58,0.12);
  transform: translateY(-3px);
}
.page-about .org-col-id{
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--orange) !important;
  margin-bottom: 0.3rem;
}
.page-about .org-col h3{
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
}
.page-about .org-col p{
  font-size: 0.94rem;
  line-height: 1.7;
  margin: 0;
}

/* 结尾 */
.page-about .about-outro{
  background: var(--night);
  background-image:
    radial-gradient(circle at 18% 78%, rgba(255,106,0,0.16) 0%, transparent 28%),
    radial-gradient(circle at 84% 22%, rgba(57,255,20,0.14) 0%, transparent 24%),
    linear-gradient(135deg, rgba(11,31,58,1) 0%, rgba(20,52,92,0.96) 100%);
  padding: clamp(3.4rem, 8vw, 6.5rem) 0;
  position: relative;
  overflow: hidden;
}
.page-about .about-outro::before{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--orange), var(--neon), transparent);
  opacity: 0.8;
}
.page-about .about-outro-inner{
  max-width: 760px;
  text-align: left;
}
.page-about .about-outro .mono-highlight{
  display: block;
  margin-bottom: 0.9rem;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
}
.page-about .about-outro h2{
  margin-bottom: 1.1rem;
}
.page-about .about-outro p{
  color: var(--rock);
  font-size: 1.05rem;
  margin-bottom: 1.8rem;
}

/* 移动端优先 + 响应式 */
@media (min-width: 700px){
  .page-about .about-hero-inner{
    gap: 0;
  }
  .page-about .about-position-grid{
    grid-template-columns: 220px 1fr;
    gap: 3rem;
  }
  .page-about .about-timeline::before{
    left: 9rem;
  }
  .page-about .timeline-entry{
    grid-template-columns: 8.6rem 1fr;
    gap: 0 2.2rem;
    padding: 0.4rem 0 2rem 11.8rem;
  }
  .page-about .timeline-entry::before{
    left: 8.95rem;
  }
  .page-about .about-capability-grid{
    grid-template-columns: 1fr 1fr;
    gap: 2.4rem;
  }
  .page-about .about-org-grid{
    grid-template-columns: 1fr 0.9fr;
    gap: 2.6rem;
  }
  .page-about .about-org-cols{
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-journey-img{
    max-height: 600px;
    object-fit: cover;
  }
}
@media (min-width: 1080px){
  .page-about .about-position-grid{
    grid-template-columns: 260px 1fr;
    gap: 4.5rem;
  }
  .page-about .about-position-main{
    max-width: 900px;
  }
  .page-about .about-hero-copy{
    padding-right: 2rem;
  }
  .page-about .about-outro-inner{
    max-width: 840px;
  }
}
@media (prefers-reduced-motion: reduce){
  .page-about *,
  .page-about *::before,
  .page-about *::after{
    transition: none !important;
    scroll-behavior: auto !important;
  }
}