.page-about{
  --about-rail: 236px;
  --about-pad: clamp(1.25rem, 3.4vw, 2.6rem);
  color: var(--mist);
  padding-block: clamp(1.2rem, 3vw, 2rem) clamp(3rem, 8vw, 5.5rem);
}
.page-about .about-shell{
  width: var(--shell);
  margin-inline: auto;
}
.page-about .breadcrumb{
  margin-bottom: clamp(1.1rem, 3vw, 1.8rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  overflow: hidden;
  padding: clamp(1.6rem, 4vw, 2.8rem) clamp(1.25rem, 3.4vw, 2.8rem) clamp(1.8rem, 5vw, 3rem);
  background: linear-gradient(158deg, rgba(23,58,84,0.92) 0%, rgba(11,36,56,0.96) 48%, rgba(6,24,38,0.98) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.page-about .about-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.5;
  pointer-events: none;
}
.page-about .about-hero::after{
  content: "";
  position: absolute;
  inset: -40% -20% auto 35%;
  height: 150%;
  background:
    radial-gradient(circle at 30% 45%, rgba(18,184,134,0.20), transparent 58%),
    radial-gradient(circle at 72% 35%, rgba(217,179,108,0.16), transparent 62%);
  pointer-events: none;
}
.page-about .about-hero__grid{
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  min-width: 0;
}
.page-about .about-hero__kicker{
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-about .about-hero__title{
  margin: 0 0 1.1rem;
  font-size: clamp(2.15rem, 6.6vw, 4.4rem);
  line-height: 1.14;
  letter-spacing: 0.04em;
  font-weight: 300;
  color: var(--mist);
}
.page-about .about-hero__lede{
  margin: 0;
  max-width: 34em;
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.9;
  color: var(--slate);
}
.page-about .about-hero__facts{
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-fact{
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 7.5rem;
  padding: 0.65rem 0.9rem;
  background: var(--glass);
  border-left: 2px solid var(--jade);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
}
.page-about .about-fact__k{
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--slate);
}
.page-about .about-fact__v{
  font-family: var(--font-mono);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--jade-soft);
}

/* ---------- 配图 ---------- */
.page-about .about-figure{
  margin: 0;
  min-width: 0;
}
.page-about .about-figure img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--ink-700);
}
.page-about .about-figure figcaption{
  margin-top: 0.6rem;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--slate);
}
.page-about .about-figure--hero{
  align-self: end;
}
.page-about .about-figure--wide,
.page-about .about-figure--tall{
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body{
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
  padding-top: clamp(1.8rem, 5vw, 3.2rem);
  min-width: 0;
}
.page-about .about-stream{
  min-width: 0;
}
.page-about .about-rail__title{
  margin: 0 0 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}
.page-about .about-index{
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-index__link{
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.42rem 0.7rem 0.42rem 0.55rem;
  font-size: 0.85rem;
  color: var(--slate);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}
.page-about .about-index__num{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible{
  color: var(--mist);
  background: var(--glass);
  border-left-color: var(--jade);
  outline: none;
}

/* ---------- 画板 ---------- */
.page-about .about-block{
  position: relative;
  margin-bottom: clamp(1.2rem, 3vw, 2rem);
  padding: var(--about-pad);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  scroll-margin-top: 6.5rem;
  min-width: 0;
}
.page-about .about-block--glass{
  background: var(--glass);
  border-color: var(--line-strong);
  backdrop-filter: blur(16px);
}
.page-about .about-block--light{
  background: var(--mist);
  border-color: transparent;
  color: var(--ink-900);
}
.page-about .about-block__head{
  margin-bottom: clamp(1rem, 2.4vw, 1.5rem);
}
.page-about .about-block__no{
  display: block;
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.page-about .about-block__no::after{
  content: "";
  display: inline-block;
  width: clamp(2rem, 8vw, 4rem);
  height: 1px;
  margin-left: 0.7rem;
  vertical-align: middle;
  background: linear-gradient(to right, var(--gold), transparent);
}
.page-about .about-block__title{
  margin: 0 0 0.65rem;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.35;
  letter-spacing: 0.03em;
  font-weight: 600;
  color: var(--mist);
}
.page-about .about-block__lede{
  margin: 0;
  max-width: 44em;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--slate);
}
.page-about .about-block--light .about-block__title{
  color: var(--ink-900);
}
.page-about .about-block--light .about-block__lede{
  color: var(--ink-700);
}
.page-about .about-block--light .about-block__no{
  color: #A9822F;
}
.page-about .about-prose p{
  margin: 0 0 0.9rem;
  max-width: 42em;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--slate);
}
.page-about .about-prose p:last-child{
  margin-bottom: 0;
}

/* ---------- 变更提示 ---------- */
.page-about .callout{
  margin: 1.2rem 0 0;
  padding: 0.75rem 0.9rem 0.75rem 1rem;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
  background: rgba(255,122,89,0.10);
  border-left: 2px solid var(--coral);
  border-radius: var(--radius);
}

/* ---------- 时间刻度 ---------- */
.page-about .about-timeline{
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 clamp(1.1rem, 2.6vw, 1.6rem);
}

/* ---------- 标签页 ---------- */
.page-about .about-tabs{
  margin-top: 0.4rem;
}
.page-about .tabs__list{
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}
.page-about .tabs__tab{
  padding: 0.55rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--slate);
  background: rgba(6,24,38,0.5);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .tabs__tab:hover,
.page-about .tabs__tab:focus-visible{
  color: var(--mist);
  border-color: var(--jade);
  outline: none;
}
.page-about .tabs__tab[aria-selected="true"]{
  color: var(--ink-900);
  background: var(--jade-soft);
  border-color: var(--jade-soft);
}
.page-about .tabs__panel{
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  margin-bottom: 1.2rem;
}
.page-about .tabs__panel:last-child{
  margin-bottom: 0;
}
.page-about .tabs__panel:focus-visible{
  outline: 2px solid var(--jade);
  outline-offset: 4px;
}
.page-about .about-stage__meta{
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.page-about .about-stage__text{
  margin: 0;
  max-width: 44em;
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--slate);
}
.page-about .about-copy{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1rem;
}
.page-about .about-copy__code{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--jade-soft);
}
.page-about .copy-btn{
  padding: 0.4rem 0.8rem;
  font-size: 0.78rem;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.page-about .copy-btn:hover,
.page-about .copy-btn:focus-visible{
  color: var(--jade-soft);
  border-color: var(--jade);
  outline: none;
}
.page-about .copy-status{
  font-size: 0.78rem;
  color: var(--coral);
  min-height: 1em;
}

/* ---------- 三原则 ---------- */
.page-about .about-principles{
  display: grid;
  gap: 1rem;
  min-width: 0;
}
.page-about .about-principle{
  padding: 1.1rem 1.1rem 1.2rem;
  background: rgba(6,24,38,0.05);
  border-left: 2px solid var(--ink-700);
  border-radius: var(--radius);
}
.page-about .about-principle__no{
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: #A9822F;
}
.page-about .about-principle__quote{
  margin: 0 0 0.6rem;
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.55;
  letter-spacing: 0.02em;
  font-weight: 600;
  color: var(--ink-900);
}
.page-about .about-principle__body{
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--ink-700);
}

/* ---------- 团队数据 ---------- */
.page-about .about-stats{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.8rem;
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-stat{
  padding: 0.9rem 1rem;
  background: rgba(18,184,134,0.06);
  border-top: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.page-about .about-stat__num{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2rem);
  letter-spacing: 0.04em;
  color: var(--jade-soft);
}
.page-about .about-stat__label{
  display: block;
  margin-top: 0.25rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* ---------- 表格 ---------- */
.page-about .table-scroll{
  overflow-x: auto;
  margin-top: clamp(1rem, 2.6vw, 1.4rem);
}
.page-about .data-table{
  width: 100%;
  min-width: 34rem;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.page-about .about-table__caption{
  caption-side: top;
  text-align: left;
  padding-bottom: 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.page-about .data-table th{
  padding: 0.65rem 0.75rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--slate);
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}
.page-about .data-table td{
  padding: 0.85rem 0.75rem;
  vertical-align: top;
  line-height: 1.75;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
}
.page-about .data-table td:first-child{
  color: var(--jade-soft);
  white-space: nowrap;
}
.page-about .data-table td.num{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--gold);
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next{
  margin-top: clamp(1.4rem, 3.4vw, 2.2rem);
  padding-top: clamp(1.2rem, 3vw, 1.8rem);
  border-top: 1px solid var(--line-strong);
}
.page-about .about-next__title{
  margin: 0 0 1rem;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--mist);
}
.page-about .about-links{
  display: grid;
  gap: 0.7rem;
  min-width: 0;
}
.page-about .about-link{
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.9rem 1rem;
  text-decoration: none;
  background: rgba(6,24,38,0.55);
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible{
  background: var(--glass);
  border-left-color: var(--jade);
  transform: translateY(-2px);
  outline: none;
}
.page-about .about-link__label{
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-about .about-link__desc{
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px){
  .page-about .about-links{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 760px){
  .page-about .about-principles{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (min-width: 900px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }
}
@media (min-width: 1000px){
  .page-about .about-body{
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-rail{
    position: sticky;
    top: clamp(5.5rem, 10vh, 7rem);
  }
  .page-about .about-index{
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.15rem;
  }
  .page-about .about-index__link{
    border-left-color: var(--line);
  }
  .page-about .about-links{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
@media (prefers-reduced-motion: reduce){
  .page-about .about-link,
  .page-about .about-index__link,
  .page-about .tabs__tab{
    transition: none;
  }
  .page-about .about-link:hover,
  .page-about .about-link:focus-visible{
    transform: none;
  }
}
<<<END>>>