.page-about{
  --about-index-light:#8C5514;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(var(--grid-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-light) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
  color: var(--text-on-dark);
  overflow-x: clip;
}

/* 首屏 */
.page-about .about-hero{
  padding: clamp(22px,4vw,44px) 0 clamp(30px,5vw,56px);
}
.page-about .breadcrumbs{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-400);
  margin-bottom: clamp(20px,3vw,32px);
}
.page-about .breadcrumbs a{
  color: var(--text-400);
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-about .breadcrumbs a:hover{
  color: var(--amber-200);
}
.page-about .about-hero__grid{
  display: grid;
  gap: 26px;
}
.page-about .about-hero__lead .lede{
  margin: 14px 0 0;
  max-width: 62ch;
}
.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 14px;
}
.page-about .about-hero__index{
  position: relative;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  padding: 18px 18px 14px;
  background: linear-gradient(160deg, rgba(23,51,79,.6), rgba(8,19,31,.35));
}
.page-about .about-hero__index::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 16px;
  height: 16px;
  border-left: 2px solid var(--amber-500);
  border-top: 2px solid var(--amber-500);
  border-top-left-radius: var(--radius);
}
.page-about .about-hero__index-title{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--amber-500);
}
.page-about .about-hero__index ol{
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-hero__index li + li{
  border-top: 1px dashed rgba(157,174,194,.18);
}
.page-about .about-hero__index a{
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 14px;
  color: var(--text-on-dark);
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-about .about-hero__index a:hover{
  color: var(--amber-200);
}
.page-about .about-hero__index .mono{
  font-size: 11.5px;
  color: var(--cyan-400);
  letter-spacing: .08em;
}

/* 关键数字带 */
.page-about .about-figures{
  list-style: none;
  margin: clamp(26px,4vw,44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-figures li{
  background: var(--ink-800);
  padding: 15px 16px;
  display: grid;
  gap: 5px;
}
.page-about .figure-num{
  font-family: var(--font-mono);
  font-size: clamp(19px,2.6vw,26px);
  line-height: 1.1;
  letter-spacing: .04em;
  color: var(--cyan-400);
}
.page-about .figure-label{
  font-size: 12.5px;
  color: var(--text-400);
}

/* 竖向索引 + 内容流 */
.page-about .about-track{
  display: grid;
  padding-bottom: clamp(32px,5vw,56px);
}
.page-about .about-rail{
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 0 0 14px;
  margin-bottom: 22px;
  scrollbar-width: none;
}
.page-about .about-rail::-webkit-scrollbar{
  display: none;
}
.page-about .about-rail__link{
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  color: var(--text-400);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .about-rail__link .mono{
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan-400);
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link[aria-current="true"]{
  color: var(--amber-200);
  border-color: var(--amber-500);
}

.page-about .about-flow{
  display: grid;
  gap: clamp(18px,3vw,28px);
}

/* 章节卡 */
.page-about .about-chapter{
  position: relative;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  padding: clamp(20px,3.2vw,34px);
  background: linear-gradient(180deg, rgba(14,31,51,.96), rgba(8,19,31,.98));
  box-shadow: var(--shadow-card);
}
.page-about .about-chapter__head{
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}
.page-about .index-tag{
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--amber-500);
}
.page-about .about-chapter h2{
  margin: 0;
  font-size: clamp(20px,2.6vw,28px);
  line-height: 1.28;
  letter-spacing: -.02em;
  color: #F2F6FA;
}
.page-about .about-chapter p{
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-on-dark);
}
.page-about .about-chapter p:last-child{
  margin-bottom: 0;
}
.page-about .about-list{
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-list li{
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-on-dark);
}
.page-about .about-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
}

/* 图像容器 */
.page-about .media-frame{
  margin: 18px 0;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}
.page-about .media-frame img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media-frame__caption{
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-400);
  border-top: 1px solid var(--ink-700);
}

/* 版本阶段 */
.page-about .stages{
  display: grid;
  margin-top: 20px;
  border-top: 1px solid var(--ink-700);
}
.page-about .stage{
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ink-700);
}
.page-about .stage__no{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan-400);
}
.page-about .stage__name{
  font-size: 16px;
  font-weight: 700;
  color: var(--amber-200);
}
.page-about .stage .stage__desc{
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-on-dark);
}

/* 团队章节（浅色） */
.page-about .about-chapter--paper{
  background: var(--paper-100);
  border-color: transparent;
  color: var(--text-800);
}
.page-about .about-chapter--paper h2{
  color: var(--text-800);
}
.page-about .about-chapter--paper .index-tag{
  color: var(--about-index-light);
}
.page-about .about-chapter--paper p{
  color: var(--on-light-muted);
}
.page-about .about-chapter--paper .note{
  color: var(--on-light-muted);
}
.page-about .team-layout{
  display: grid;
  gap: 22px;
  margin-top: 4px;
}
.page-about .team-aside .media-frame{
  margin: 0 0 10px;
  border-color: rgba(23,51,79,.18);
  background: rgba(23,51,79,.06);
}
.page-about .team-aside .note{
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
}

/* 团队四格错位卡 */
.page-about .team-grid{
  display: grid;
  gap: 14px;
  margin-top: 18px;
}
.page-about .team-card{
  position: relative;
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 17px 18px 16px;
  background: #FFFFFF;
  border: 1px solid rgba(23,51,79,.16);
  border-radius: var(--radius);
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}
.page-about .team-card:hover,
.page-about .team-card:focus-visible{
  transform: translateY(-4px);
  border-color: var(--cyan-400);
  box-shadow: 0 22px 34px -30px rgba(8,19,31,.9);
  outline: none;
}
.page-about .team-card:focus-visible{
  outline: 2px solid var(--cyan-deep);
  outline-offset: 3px;
}
.page-about .team-card__no{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan-deep);
}
.page-about .team-card h3{
  margin: 0;
  font-size: 16.5px;
  letter-spacing: -.01em;
  color: var(--text-800);
}
.page-about .about-chapter--paper .team-card p{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--on-light-muted);
}

/* 运行标准 */
.page-about .about-chapter--deep{
  background: linear-gradient(180deg, var(--ink-800), rgba(8,19,31,.98));
}
.page-about .standard-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 12px;
  margin-top: 20px;
}
.page-about .standard-card{
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 15px 14px 16px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  background: rgba(8,19,31,.62);
}
.page-about .standard-card__dot{
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(49,208,195,.16);
}
.page-about .standard-card__num{
  font-family: var(--font-mono);
  font-size: clamp(19px,2.4vw,25px);
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--amber-500);
}
.page-about .standard-card__num small{
  font-size: 12.5px;
  color: var(--amber-200);
  letter-spacing: .04em;
}
.page-about .standard-card__label{
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-on-dark);
}
.page-about .about-chapter .standard-card__note{
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-400);
}

/* 合作生态 */
.page-about .eco-grid{
  display: grid;
  gap: 14px;
  margin-top: 18px;
}
.page-about .eco-item{
  padding-left: 14px;
  border-left: 2px solid var(--cyan-400);
}
.page-about .eco-item h3{
  margin: 0 0 4px;
  font-size: 15px;
  color: var(--amber-200);
}
.page-about .about-chapter .eco-item p{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-on-dark);
}

/* 归属与备案 */
.page-about .record-layout{
  display: grid;
  gap: 22px;
  margin-top: 4px;
}
.page-about .record-layout .media-frame{
  margin: 0;
}
.page-about .about-facts{
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-facts > div{
  display: grid;
  gap: 3px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(157,174,194,.2);
}
.page-about .about-facts dt{
  font-size: 12.5px;
  color: var(--text-400);
}
.page-about .about-facts dd{
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-on-dark);
  overflow-wrap: anywhere;
}
.page-about .about-facts dd.mono{
  color: var(--amber-200);
  letter-spacing: .03em;
}

/* 底部引导 */
.page-about .about-cta{
  margin-top: clamp(24px,4vw,40px);
  padding: clamp(34px,5vw,60px) 0 clamp(40px,6vw,72px);
  border-top: 1px solid var(--ink-700);
  background: linear-gradient(180deg, rgba(14,31,51,.9), rgba(8,19,31,1));
}
.page-about .about-cta__grid{
  display: grid;
  gap: 22px;
}
.page-about .about-cta h2{
  margin: 0 0 10px;
  font-size: clamp(20px,2.6vw,27px);
  line-height: 1.3;
  letter-spacing: -.02em;
  color: #F2F6FA;
}
.page-about .about-cta p{
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text-400);
}
.page-about .about-cta__links{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-cta__links a{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  background: var(--ink-800);
  color: var(--text-on-dark);
  font-size: 14.5px;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.page-about .about-cta__links a:hover{
  background: var(--ink-700);
  color: var(--amber-200);
}
.page-about .about-cta__links .mono{
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--cyan-400);
}

/* 窄屏到桌面 */
@media (min-width: 680px){
  .page-about .about-figures{
    grid-template-columns: repeat(4, minmax(0,1fr));
  }
  .page-about .team-grid{
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
  .page-about .team-card:nth-child(even){
    margin-top: 26px;
  }
  .page-about .team-grid{
    margin-bottom: 26px;
  }
}

@media (min-width: 780px){
  .page-about .stage{
    grid-template-columns: 62px 92px minmax(0,1fr);
    gap: 18px;
    align-items: baseline;
    padding: 18px 0;
  }
  .page-about .eco-grid{
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 18px 26px;
  }
}

@media (min-width: 900px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0,1.45fr) minmax(0,.78fr);
    gap: 46px;
    align-items: start;
  }
  .page-about .team-layout{
    grid-template-columns: minmax(0,1fr) 250px;
    gap: 30px;
    align-items: start;
  }
  .page-about .record-layout{
    grid-template-columns: minmax(0,1fr) minmax(0,.85fr);
    gap: 30px;
    align-items: start;
  }
  .page-about .standard-grid{
    grid-template-columns: repeat(4, minmax(0,1fr));
  }
  .page-about .about-cta__grid{
    grid-template-columns: minmax(0,1fr) minmax(0,1fr);
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 1000px){
  .page-about .about-track{
    grid-template-columns: 186px minmax(0,1fr);
    gap: clamp(28px,4vw,52px);
  }
  .page-about .about-rail{
    display: grid;
    gap: 0;
    overflow: visible;
    padding: 0;
    margin-bottom: 0;
    border-left: 1px solid var(--ink-700);
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-about .about-rail__link{
    flex: none;
    justify-content: flex-start;
    border: 0;
    border-radius: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 0 9px 14px;
    font-size: 13.5px;
    white-space: normal;
  }
  .page-about .about-rail__link:hover,
  .page-about .about-rail__link[aria-current="true"]{
    border-left-color: var(--amber-500);
    color: var(--amber-200);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .team-card,
  .page-about .btn,
  .page-about .about-rail__link,
  .page-about .about-cta__links a{
    transition: none;
  }
  .page-about .team-card:hover{
    transform: none;
  }
}
<<<END>>>