.page-about{
  --about-rail:196px;
  --about-pad:clamp(22px,3.4vw,46px);
  --about-line-dark:var(--slate);
  background:var(--ink);
  color:var(--paper);
  padding-bottom:clamp(40px,6vw,80px);
}

.page-about a:focus-visible,
.page-about button:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  overflow:hidden;
  padding:clamp(18px,3vw,34px) 0 clamp(36px,6vw,80px);
  background:
    radial-gradient(120% 90% at 82% 6%, rgba(214,178,106,.13), transparent 62%),
    var(--ink);
  border-bottom:1px solid var(--slate);
}
.page-about .about-hero__inner{
  display:grid;
  gap:clamp(26px,4vw,44px);
  align-items:end;
  margin-top:clamp(20px,3.6vw,40px);
}
.page-about .about-hero__kicker{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--clay);
  text-transform:uppercase;
}
.page-about .about-hero__title{
  margin:clamp(12px,2vw,22px) 0 0;
  font-family:var(--font-serif);
  font-weight:700;
  font-size:clamp(38px,8.6vw,96px);
  line-height:1.02;
  letter-spacing:-.015em;
}
.page-about .about-hero__title em{
  font-style:normal;
  color:var(--gold);
}
.page-about .about-hero__lede{
  margin:clamp(16px,2.4vw,26px) 0 0;
  max-width:52ch;
  font-size:clamp(15px,1.5vw,18px);
  line-height:1.85;
  color:var(--fog);
}
.page-about .about-hero__facts{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px 18px;
  margin-top:clamp(24px,4vw,40px);
  padding-top:18px;
  border-top:1px solid var(--slate);
}
.page-about .fact{
  display:grid;
  gap:5px;
}
.page-about .fact__num{
  font-family:var(--font-serif);
  font-size:clamp(24px,2.8vw,34px);
  line-height:1;
  color:var(--gold);
}
.page-about .fact__unit{
  font-size:.5em;
  margin-left:2px;
  color:var(--sand);
}
.page-about .fact__label{
  font-size:12px;
  letter-spacing:.1em;
  color:var(--fog);
}
.page-about .about-hero__figure{
  margin:0;
  border:1px solid var(--slate);
  background:var(--night);
}
.page-about .about-hero__figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:3 / 4;
  object-fit:cover;
}
.page-about .about-hero__figure figcaption{
  padding:10px 14px;
  border-top:1px solid var(--slate);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--fog);
}
.page-about .about-hero__annot{
  display:none;
  margin:0;
}

/* ---------- 索引 + 叙事流 ---------- */
.page-about .about-index{
  padding-top:clamp(30px,5vw,64px);
}
.page-about .about-index__rail{
  margin-bottom:clamp(22px,3.4vw,36px);
}
.page-about .about-index__title{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--clay);
  text-transform:uppercase;
}
.page-about .about-index__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  column-gap:18px;
}
.page-about .about-index__link{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:10px;
  align-items:baseline;
  padding:9px 0;
  border-bottom:1px solid var(--slate);
  color:var(--fog);
  font-size:13.5px;
  line-height:1.4;
  text-decoration:none;
  transition:color .2s var(--ease);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible{
  color:var(--sand);
}
.page-about .about-index__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--clay);
}
.page-about .about-index__link:hover .about-index__num{
  color:var(--gold);
}
.page-about .about-index__stream{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
}

/* ---------- 通用面板 ---------- */
.page-about .about-block{
  --ab-text:var(--paper);
  --ab-muted:var(--fog);
  --ab-line:var(--slate);
  position:relative;
  padding:var(--about-pad);
  border:1px solid var(--slate);
  background:var(--night);
  color:var(--ab-text);
}
.page-about .about-block--paper{
  --ab-text:var(--ink);
  --ab-muted:#4a5f6d;
  --ab-line:#d5c9b4;
  background:var(--paper);
  border-color:#cabfa9;
}
.page-about .about-block--ink{
  --ab-text:var(--paper);
  --ab-muted:var(--fog);
  --ab-line:var(--slate);
  padding-left:0;
  padding-right:0;
  border:0;
  border-top:1px solid var(--slate);
  background:transparent;
}
.page-about .about-block__kicker{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--gold);
  text-transform:uppercase;
}
.page-about .about-block--paper .about-block__kicker{
  color:var(--clay);
}
.page-about .about-block h2{
  margin:0;
  font-family:var(--font-serif);
  font-weight:700;
  font-size:clamp(24px,3.6vw,42px);
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--ab-text);
}
.page-about .about-block__lead{
  margin:14px 0 0;
  max-width:60ch;
  font-size:15.5px;
  line-height:1.85;
  color:var(--ab-muted);
}
.page-about .about-block__link{
  display:inline-block;
  margin-top:clamp(18px,2.4vw,26px);
  padding-bottom:3px;
  border-bottom:1px solid rgba(214,178,106,.45);
  color:var(--gold);
  font-size:14px;
  letter-spacing:.04em;
  text-decoration:none;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.page-about .about-block--paper .about-block__link{
  color:var(--clay);
  border-bottom-color:rgba(138,90,68,.5);
}
.page-about .about-block__link:hover{
  color:var(--sand);
  border-bottom-color:var(--sand);
}
.page-about .about-note{
  margin-top:clamp(20px,3vw,30px);
  border-left:2px solid var(--clay);
  background:rgba(138,90,68,.08);
  padding:14px 18px;
}
.page-about .about-note p{
  margin:0;
  font-size:14.5px;
  line-height:1.8;
  color:var(--ab-muted);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure{
  margin:clamp(18px,2.6vw,26px) 0 0;
  border:1px solid var(--slate);
  background:var(--night);
}
.page-about .about-figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-figure--wide img{
  aspect-ratio:14 / 9;
}
.page-about .about-figure--square img{
  aspect-ratio:1 / 1;
}
.page-about .about-figure__cap{
  padding:9px 13px;
  border-top:1px solid var(--slate);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--fog);
}

/* ---------- 六大栏目 ---------- */
.page-about .about-columns{
  list-style:none;
  margin:clamp(18px,2.6vw,28px) 0 0;
  padding:0;
}
.page-about .about-columns__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:6px 14px;
  align-items:baseline;
  padding:16px 0;
  border-top:1px solid var(--ab-line);
}
.page-about .about-columns__num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gold);
}
.page-about .about-columns__item h3{
  margin:0 0 5px;
  font-family:var(--font-serif);
  font-size:19px;
  font-weight:600;
  color:var(--ab-text);
}
.page-about .about-columns__item p{
  margin:0;
  font-size:14.5px;
  line-height:1.75;
  color:var(--ab-muted);
}
.page-about .about-columns__tag{
  grid-column:2;
  justify-self:start;
}

/* ---------- 上线流程 ---------- */
.page-about .about-steps{
  list-style:none;
  display:grid;
  gap:clamp(16px,2.4vw,26px);
  margin:clamp(20px,3vw,34px) 0 0;
  padding:0;
}
.page-about .about-steps__item{
  border-top:2px solid var(--gold);
  padding-top:14px;
}
.page-about .about-steps__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gold);
}
.page-about .about-steps__item h3{
  margin:9px 0 6px;
  font-family:var(--font-serif);
  font-size:17px;
  font-weight:600;
  color:var(--paper);
}
.page-about .about-steps__item p{
  margin:0;
  font-size:14.5px;
  line-height:1.78;
  color:var(--fog);
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  display:grid;
  gap:clamp(20px,3vw,36px);
  margin-top:clamp(18px,2.6vw,28px);
}
.page-about .about-team__stats{
  display:flex;
  flex-wrap:wrap;
  gap:22px;
}
.page-about .about-stat{
  display:grid;
  gap:3px;
  padding-left:14px;
  border-left:2px solid var(--clay);
}
.page-about .about-stat__num{
  font-family:var(--font-serif);
  font-size:clamp(34px,4.4vw,52px);
  line-height:1;
  color:var(--clay);
}
.page-about .about-stat__label{
  font-size:12px;
  letter-spacing:.1em;
  color:var(--ab-muted);
}
.page-about .about-roles{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
}
.page-about .about-roles__item{
  padding:12px 0;
  border-bottom:1px solid var(--ab-line);
}
.page-about .about-roles__item:first-child{
  border-top:1px solid var(--ab-line);
}
.page-about .about-roles__name{
  display:block;
  margin-bottom:4px;
  font-family:var(--font-serif);
  font-size:16px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--ab-text);
}
.page-about .about-roles__item p{
  margin:0;
  font-size:14.5px;
  line-height:1.75;
  color:var(--ab-muted);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-track{
  list-style:none;
  margin:clamp(20px,3vw,32px) 0 0;
  padding:0;
}
.page-about .about-track__item{
  position:relative;
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:12px;
  padding:0 0 26px 18px;
  border-left:1px solid var(--slate);
}
.page-about .about-track__item:last-child{
  padding-bottom:0;
  border-left-color:transparent;
}
.page-about .about-track__item::before{
  content:"";
  position:absolute;
  left:-4.5px;
  top:7px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 0 4px rgba(214,178,106,.13);
}
.page-about .about-track__item--current::before{
  background:var(--cinnabar);
  box-shadow:0 0 0 4px rgba(194,75,56,.2);
}
.page-about .about-track__year{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--gold);
}
.page-about .about-track__item--current .about-track__year{
  color:var(--sand);
}
.page-about .about-track__body h3{
  margin:0 0 5px;
  font-family:var(--font-serif);
  font-size:17px;
  font-weight:600;
  color:var(--paper);
}
.page-about .about-track__body p{
  margin:0;
  max-width:56ch;
  font-size:14.5px;
  line-height:1.78;
  color:var(--fog);
}

/* ---------- 合作网络 ---------- */
.page-about .about-network{
  position:relative;
  overflow:hidden;
  border:1px solid var(--slate);
  background-image:
    linear-gradient(155deg, rgba(16,42,67,.92), rgba(8,23,37,.97)),
    repeating-linear-gradient(0deg, rgba(44,64,82,.5) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(90deg, rgba(44,64,82,.5) 0 1px, transparent 1px 46px);
  background-color:var(--ink);
  color:var(--paper);
}
.page-about .about-network__inner{
  display:grid;
  gap:clamp(20px,3vw,34px);
  padding:var(--about-pad);
}
.page-about .about-network h2{
  margin:0;
  font-family:var(--font-serif);
  font-weight:700;
  font-size:clamp(24px,3.6vw,42px);
  line-height:1.16;
  letter-spacing:-.01em;
}
.page-about .about-network .about-block__kicker{
  color:var(--gold);
}
.page-about .about-network .about-block__lead{
  color:var(--fog);
}
.page-about .about-network__stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px;
  margin-top:22px;
  padding-top:16px;
  border-top:1px solid var(--slate);
}
.page-about .about-network__stat{
  display:grid;
  gap:3px;
}
.page-about .about-network__num{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.8vw,30px);
  line-height:1;
  color:var(--sand);
}
.page-about .about-network__label{
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--fog);
}
.page-about .about-network .about-figure{
  margin:0;
  border-color:rgba(44,64,82,.9);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles{
  margin-top:clamp(16px,2.4vw,26px);
}
.page-about .about-principles .accordion__trigger{
  width:100%;
  padding:14px 0;
  border:0;
  border-top:1px solid var(--ab-line);
  background:none;
  color:var(--ab-text);
  font-family:var(--font-serif);
  font-size:16px;
  font-weight:600;
  text-align:left;
  cursor:pointer;
}
.page-about .about-principles .accordion__panel{
  padding:0 0 14px;
}
.page-about .about-principles .accordion__panel p{
  margin:0;
  max-width:62ch;
  font-size:14.5px;
  line-height:1.8;
  color:var(--ab-muted);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta{
  margin-top:clamp(24px,4vw,52px);
  padding:clamp(32px,5vw,64px) 0;
  border-top:1px solid var(--slate);
  background:linear-gradient(150deg, rgba(194,75,56,.16), transparent 62%), var(--night);
}
.page-about .about-cta__kicker{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--gold);
  text-transform:uppercase;
}
.page-about .about-cta h2{
  margin:0 0 12px;
  font-family:var(--font-serif);
  font-weight:700;
  font-size:clamp(24px,3.6vw,40px);
  line-height:1.2;
}
.page-about .about-cta p{
  margin:0 0 22px;
  max-width:56ch;
  font-size:15.5px;
  line-height:1.8;
  color:var(--fog);
}
.page-about .about-cta__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

/* ---------- 断点 ---------- */
@media (min-width:600px){
  .page-about .about-index__list{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
}

@media (min-width:680px){
  .page-about .about-hero__facts{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
}

@media (min-width:720px){
  .page-about .about-columns__item{
    grid-template-columns:54px minmax(0,1fr) auto;
    gap:10px 18px;
    align-items:start;
  }
  .page-about .about-columns__tag{
    grid-column:auto;
    justify-self:end;
    margin-top:2px;
  }
  .page-about .about-track__item{
    grid-template-columns:80px minmax(0,1fr);
  }
}

@media (min-width:780px){
  .page-about .about-steps{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
}

@media (min-width:820px){
  .page-about .about-team{
    grid-template-columns:minmax(0,220px) minmax(0,1fr);
    align-items:start;
  }
  .page-about .about-team__stats{
    flex-direction:column;
    gap:26px;
  }
}

@media (min-width:900px){
  .page-about .about-hero__inner{
    grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  }
  .page-about .about-network__inner{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    align-items:center;
  }
}

@media (min-width:1024px){
  .page-about .about-index{
    display:grid;
    grid-template-columns:var(--about-rail) minmax(0,1fr);
    gap:clamp(28px,3.6vw,60px);
    align-items:start;
  }
  .page-about .about-index__rail{
    position:sticky;
    top:112px;
    margin-bottom:0;
  }
  .page-about .about-index__list{
    grid-template-columns:minmax(0,1fr);
    column-gap:0;
  }
}

@media (min-width:1100px){
  .page-about .about-roles{
    grid-template-columns:repeat(2,minmax(0,1fr));
    column-gap:30px;
  }
  .page-about .about-roles__item:nth-child(2){
    border-top:1px solid var(--ab-line);
  }
}

@media (min-width:1200px){
  .page-about .about-hero__annot{
    display:block;
    position:absolute;
    right:22px;
    top:38%;
    writing-mode:vertical-rl;
    font-size:12px;
    letter-spacing:.34em;
    color:var(--clay);
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about .about-index__link,
  .page-about .about-block__link{
    transition:none;
  }
}
<<<END>>>