.page-about{
  --about-pad: clamp(20px, 5vw, 48px);
  --about-soft: rgba(22, 33, 46, .08);
  --about-soft-line: rgba(22, 33, 46, .12);
  background: var(--mist);
  color: var(--ink-text);
}

.page-about .container{
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding-left: var(--about-pad);
  padding-right: var(--about-pad);
}

/* ---------- 首屏 ---------- */
.page-about .hero{
  position: relative;
  overflow: hidden;
  padding: calc(var(--bar-h) + clamp(22px, 4vw, 44px)) 0 clamp(56px, 9vw, 104px);
  background: linear-gradient(165deg, #061826 0%, #0B2A3D 56%, #061826 100%);
  color: var(--mist);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - clamp(20px, 4vw, 46px)), 0 100%);
}

.page-about .hero__lines{
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(30, 224, 206, .13) 0 1px, transparent 1px 92px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 78%);
}

.page-about .hero__inner{
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .breadcrumb__item{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}

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

.page-about .breadcrumb__item a:hover{
  text-decoration: underline;
}

.page-about .breadcrumb__list{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb__item + .breadcrumb__item::before{
  content: "/";
  margin-right: 8px;
  color: rgba(196, 211, 220, .5);
}

.page-about .hero__kicker{
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .hero__title{
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 5.4vw, 54px);
  line-height: 1.22;
  letter-spacing: -.01em;
  max-width: 17em;
}

.page-about .hero__lead{
  margin: 0 0 clamp(24px, 4vw, 40px);
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 248, 250, .82);
}

.page-about .hero__stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(30, 224, 206, .2);
  border: 1px solid rgba(30, 224, 206, .2);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .hero__stat{
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(6, 24, 38, .86);
}

.page-about .hero__stat-num{
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-about .hero__stat-key{
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .hero__viz{
  display: none;
}

.page-about .hero__viz svg{
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 章节刻度导航 ---------- */
.page-about .chapters{
  position: sticky;
  top: var(--bar-h);
  z-index: 20;
  background: rgba(6, 24, 38, .94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.page-about .chapters__inner{
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .chapters__inner::-webkit-scrollbar{
  display: none;
}

.page-about .chapters__link{
  display: flex;
  align-items: baseline;
  gap: 7px;
  flex: 0 0 auto;
  padding: 13px 12px;
  border-bottom: 2px solid transparent;
  text-decoration: none;
  color: var(--slate);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .chapters__link:hover,
.page-about .chapters__link:focus-visible{
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .chapters__num{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--cyan-deep);
}

.page-about .chapters__label{
  font-size: 13px;
  white-space: nowrap;
}

/* ---------- 通用章节 ---------- */
.page-about .chapter{
  position: relative;
  padding: clamp(42px, 7vw, 84px) 0;
  border-top: 1px solid var(--about-soft);
}

.page-about .chapter--ink{
  background: linear-gradient(150deg, #0B2A3D 0%, #061826 100%);
  color: var(--mist);
  border-top-color: var(--line);
}

.page-about .chapter__head{
  position: relative;
  margin: 0 0 clamp(16px, 3vw, 26px);
}

.page-about .chapter__num{
  position: absolute;
  top: -.32em;
  left: -2px;
  z-index: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(56px, 12vw, 96px);
  line-height: 1;
  letter-spacing: .02em;
  color: rgba(18, 58, 82, .16);
  pointer-events: none;
  user-select: none;
}

.page-about .chapter--ink .chapter__num{
  color: rgba(30, 224, 206, .17);
}

.page-about .chapter__title{
  position: relative;
  z-index: 1;
  margin: 0;
  padding-top: clamp(30px, 6vw, 54px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 38px);
  line-height: 1.32;
  letter-spacing: -.01em;
  max-width: 20em;
}

.page-about .chapter__lead{
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .chapter--ink .chapter__lead{
  color: rgba(245, 248, 250, .86);
}

.page-about .chapter__grid{
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

.page-about .prose p{
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .prose p:last-child{
  margin-bottom: 0;
}

.page-about .chapter--ink .prose p{
  color: rgba(245, 248, 250, .86);
}

.page-about .prose__link{
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 166, 156, .5);
}

.page-about .prose__link:hover{
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .chapter--ink .prose__link{
  color: var(--cyan);
  border-bottom-color: rgba(30, 224, 206, .5);
}

.page-about .chapter__figure{
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--about-soft-line);
}

.page-about .chapter--ink .chapter__figure{
  border-color: var(--line);
}

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

.page-about .chapter__figure figcaption{
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-700);
  background: rgba(255, 255, 255, .7);
}

.page-about .chapter--ink .chapter__figure figcaption{
  color: var(--slate);
  background: rgba(6, 24, 38, .9);
}

.page-about .chapter__foot{
  margin: clamp(22px, 4vw, 34px) 0 0;
}

.page-about .chapter__foot-inline{
  margin-top: 8px;
}

/* ---------- 12 类产品线 ---------- */
.page-about .lines{
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .lines__group{
  padding: 18px 18px 8px;
  background: #ffffff;
  border: 1px solid var(--about-soft-line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(22, 33, 46, .04);
}

.page-about .lines__head{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--about-soft-line);
}

.page-about .lines__code{
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber);
}

.page-about .lines__name{
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.3;
}

.page-about .lines__desc{
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-700);
}

.page-about .lines__list{
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .lines__item{
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(22, 33, 46, .06);
}

.page-about .lines__item:last-child{
  border-bottom: 0;
}

.page-about .lines__item-name{
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .lines__item-name::before{
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 7px;
  vertical-align: middle;
  border-radius: 50%;
  background: var(--cyan-deep);
}

.page-about .lines__item-desc{
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-700);
}

/* ---------- 团队 ---------- */
.page-about .team-block{
  margin: clamp(20px, 3vw, 32px) 0 clamp(26px, 4vw, 42px);
}

.page-about .team{
  display: flex;
  width: 100%;
  height: 62px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .team__seg{
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: #061826;
  letter-spacing: .02em;
  transition: filter .2s var(--ease);
}

.page-about .team__seg span{
  padding: 0 4px;
  text-align: center;
  line-height: 1.2;
}

.page-about .seg--edit{
  flex: 4 1 0;
  background: var(--cyan);
}

.page-about .seg--front{
  flex: 3 1 0;
  background: var(--cyan-deep);
  color: #04141f;
}

.page-about .seg--review{
  flex: 3 1 0;
  background: var(--amber);
}

.page-about .seg--ops{
  flex: 4 1 0;
  background: rgba(196, 211, 220, .82);
}

.page-about .team__seg:hover{
  filter: brightness(1.15);
}

.page-about .team__notes{
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team__note{
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 3px solid rgba(30, 224, 206, .4);
  border-radius: 8px;
  background: rgba(6, 24, 38, .55);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .team__note-title{
  margin: 0 0 5px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .team__note-desc{
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: rgba(245, 248, 250, .78);
}

.page-about .team-block:has(.seg--edit:hover) .note--edit,
.page-about .team-block:has(.seg--front:hover) .note--front,
.page-about .team-block:has(.seg--review:hover) .note--review,
.page-about .team-block:has(.seg--ops:hover) .note--ops{
  border-color: var(--amber);
  border-left-color: var(--amber);
  background: rgba(245, 179, 60, .12);
}

.page-about .subhead{
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--mist);
}

.page-about .flow{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .flow__step{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}

.page-about .flow__num{
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .flow__title{
  margin: 2px 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .flow__desc{
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: rgba(245, 248, 250, .76);
}

.page-about .chapter__figure--tight{
  margin-top: 4px;
}

/* ---------- 时间线 ---------- */
.page-about .tl__banner{
  margin: clamp(20px, 3vw, 30px) 0 clamp(26px, 4vw, 40px);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-soft-line);
}

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

.page-about .tl{
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before{
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 62%, var(--coral) 100%);
}

.page-about .tl__item{
  position: relative;
  padding: 0 0 24px 40px;
  border-radius: 8px;
  transition: background .2s var(--ease);
}

.page-about .tl__item:last-child{
  padding-bottom: 0;
}

.page-about .tl__item:hover{
  background: rgba(30, 224, 206, .06);
}

.page-about .tl__dot{
  position: absolute;
  left: 0;
  top: 5px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--cyan-deep);
  background: var(--mist);
}

.page-about .tl__item--current .tl__dot{
  left: -4px;
  top: 2px;
  width: 32px;
  height: 32px;
  border-color: var(--coral);
  background: var(--coral);
  box-shadow: 0 0 0 6px rgba(255, 107, 90, .16);
}

.page-about .tl__meta{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 6px;
}

.page-about .tl__ver{
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan-deep);
}

.page-about .tl__time{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .03em;
  color: var(--ink-700);
  padding: 2px 8px;
  border: 1px solid var(--about-soft-line);
  border-radius: 999px;
}

.page-about .tl__item--current .tl__ver{
  color: var(--coral);
}

.page-about .tl__item--current .tl__time{
  color: var(--coral);
  border-color: rgba(255, 107, 90, .45);
  background: rgba(255, 107, 90, .09);
}

.page-about .tl__title{
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.35;
}

.page-about .tl__desc{
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(22, 33, 46, .78);
  transition: color .2s var(--ease);
}

.page-about .tl__item:hover .tl__desc,
.page-about .tl__item--current .tl__desc{
  color: var(--ink-text);
}

/* ---------- 合作生态 ---------- */
.page-about .orbit-block{
  position: relative;
  width: min(100%, 420px);
  min-height: 400px;
  margin: 0 auto;
}

.page-about .orbit{
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(100%, 280px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
}

.page-about .orbit__ring{
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from -40deg,
      var(--cyan) 0 25%,
      var(--amber) 25% 50%,
      var(--cyan-deep) 50% 75%,
      rgba(255, 107, 90, .85) 75% 100%);
  -webkit-mask: radial-gradient(circle at 50% 50%, transparent 0 47%, #000 47.5%);
  mask: radial-gradient(circle at 50% 50%, transparent 0 47%, #000 47.5%);
}

.page-about .orbit__core{
  position: absolute;
  inset: 26%;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink-900);
  color: var(--mist);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
  box-shadow: 0 0 0 1px rgba(30, 224, 206, .45);
}

.page-about .orbit__nodes{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.page-about .orbit__node{
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  background: #ffffff;
  border: 1px solid var(--about-soft-line);
  border-left: 3px solid var(--cyan-deep);
  border-radius: 8px;
}

.page-about .orbit__node-k{
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .orbit__node-v{
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-700);
}

/* ---------- 三条标准 ---------- */
.page-about .std{
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(30, 224, 206, .18);
  border: 1px solid rgba(30, 224, 206, .18);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .std__item{
  padding: 20px 20px 22px;
  background: rgba(6, 24, 38, .9);
}

.page-about .std__num{
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-about .std__title{
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--mist);
}

.page-about .std__desc{
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(245, 248, 250, .78);
}

/* ---------- 继续导航 ---------- */
.page-about .next{
  padding: clamp(40px, 6vw, 72px) 0;
  background: var(--mist);
  border-top: 1px solid var(--about-soft-line);
}

.page-about .next__inner{
  display: grid;
  gap: 22px;
}

.page-about .next__title{
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
}

.page-about .next__desc{
  margin: 0;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-about .next__list{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .next__link{
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 14px 16px;
  background: #ffffff;
  border: 1px solid var(--about-soft-line);
  border-radius: 10px;
  text-decoration: none;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .next__link:hover,
.page-about .next__link:focus-visible{
  border-color: var(--cyan-deep);
  transform: translateY(-2px);
}

.page-about .next__link-k{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan-deep);
}

.page-about .next__link-v{
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-text);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px){
  .page-about .hero__stats{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team__notes{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .next__list{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px){
  .page-about .hero__inner{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }
  .page-about .hero__viz{
    display: block;
  }
  .page-about .hero__stats{
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-about .lines{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .chapter__grid{
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
  .page-about .chapter__grid--team{
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
  .page-about .chapter__grid--orbit{
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: center;
  }
  .page-about .team__notes{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .std{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .next__inner{
    grid-template-columns: minmax(0, .62fr) minmax(0, 1.38fr);
    align-items: start;
  }
  .page-about .next__list{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .orbit-block{
    min-height: 430px;
  }
  .page-about .orbit{
    width: 290px;
  }
  .page-about .orbit__nodes{
    display: block;
    margin-top: 0;
  }
  .page-about .orbit__node{
    position: absolute;
    width: 136px;
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 6px 18px rgba(6, 24, 38, .08);
  }
  .page-about .orbit__node--a{
    left: 50%;
    top: 0;
    transform: translate(-50%, -18%);
  }
  .page-about .orbit__node--b{
    left: 100%;
    top: 50%;
    transform: translate(-94%, -50%);
  }
  .page-about .orbit__node--c{
    left: 50%;
    top: 100%;
    transform: translate(-50%, -82%);
  }
  .page-about .orbit__node--d{
    left: 0;
    top: 50%;
    transform: translate(6%, -50%);
  }
}

@media (min-width: 1080px){
  .page-about .chapters__link{
    padding: 15px 18px;
  }
  .page-about .tl__item{
    padding-left: 46px;
    padding-bottom: 28px;
  }
  .page-about .tl__desc{
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .next__link,
  .page-about .team__seg,
  .page-about .tl__item,
  .page-about .tl__desc{
    transition: none;
  }
  .page-about .next__link:hover{
    transform: none;
  }
}