.page-about{
  --about-line:rgba(28,36,48,.14);
  --about-warm:#FFF3D6;
  position:relative;
  overflow-x:clip;
  color:var(--ink-900);
  font-family:var(--font-body);
  background:linear-gradient(180deg,var(--snow) 0%,#FFFAF1 55%,var(--about-warm) 100%);
}
.page-about *,
.page-about *::before,
.page-about *::after{box-sizing:border-box;}

.page-about .about-fret{
  position:absolute;
  top:0;left:0;right:0;
  height:240px;
  z-index:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(11,62,111,.12) 0 1px,transparent 1px 32px),
    repeating-linear-gradient(0deg,rgba(11,62,111,.10) 0 1px,transparent 1px 32px);
  -webkit-mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.25) 55%,transparent 100%);
  mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.25) 55%,transparent 100%);
}

/* 首屏 */
.page-about .about-top{
  position:relative;
  z-index:1;
  padding-top:clamp(18px,4vw,34px);
  padding-bottom:clamp(20px,3vw,30px);
}
.page-about .breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  margin:0;
  padding:0;
  list-style:none;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--ink-500);
}
.page-about .breadcrumb__link{
  color:var(--sky-900);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color 180ms var(--ease);
}
.page-about .breadcrumb__link:hover{border-bottom-color:var(--sky-500);}
.page-about .breadcrumb__sep{color:var(--ink-500);}

.page-about .about-kicker{
  margin:clamp(20px,3vw,34px) 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--red-500);
}
.page-about .about-title{
  margin:12px 0 0;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(32px,7vw,62px);
  line-height:1.14;
  letter-spacing:-.02em;
  max-width:16em;
}
.page-about .about-title__mark{
  display:inline-block;
  padding:0 .12em;
  background:linear-gradient(180deg,transparent 62%,rgba(232,181,74,.6) 62%);
}
.page-about .about-lede{
  margin:20px 0 0;
  max-width:62ch;
  font-size:17px;
  line-height:1.8;
  color:var(--ink-900);
}

.page-about .about-index{
  margin-top:clamp(28px,4vw,40px);
  padding-top:18px;
  border-top:1px solid var(--about-line);
}
.page-about .about-index__cap{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--ink-500);
}
.page-about .about-index__list{
  display:grid;
  grid-template-columns:1fr;
  gap:6px;
  margin:0;
  padding:0;
  list-style:none;
}
.page-about .about-index__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:11px 14px;
  font-size:14px;
  color:var(--ink-900);
  text-decoration:none;
  background:rgba(230,242,255,.55);
  clip-path:var(--chamfer);
  transition:background 150ms var(--ease),color 150ms var(--ease);
}
.page-about .about-index__link:hover{background:var(--sky-100);color:var(--sky-900);}
.page-about .about-index__num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--red-500);
}

@media (min-width:720px){
  .page-about .about-index__list{grid-template-columns:repeat(3,1fr);}
}
@media (min-width:1080px){
  .page-about .about-index__list{grid-template-columns:repeat(6,1fr);gap:8px;}
  .page-about .about-index__link{padding:11px 10px;font-size:13px;}
}

/* 章节通用 */
.page-about .about-chapter{
  position:relative;
  z-index:1;
  padding-block:clamp(38px,6vw,72px);
}
.page-about .chapter-head{max-width:840px;}
.page-about .chapter-index{
  display:inline-block;
  padding:2px 9px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--red-500);
  text-decoration:none;
  border:1px solid rgba(178,34,34,.35);
  clip-path:var(--chamfer);
  transition:background 150ms var(--ease),border-color 150ms var(--ease);
}
.page-about .chapter-index:hover{background:rgba(232,181,74,.28);border-color:var(--red-500);}
.page-about .chapter-title{
  margin:12px 0 12px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(23px,3.6vw,38px);
  line-height:1.24;
  letter-spacing:-.01em;
}
.page-about .chapter-deck{
  margin:0;
  max-width:60ch;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-500);
}

/* 图文错位 */
.page-about .about-split{
  display:grid;
  gap:26px;
  margin-top:clamp(26px,4vw,38px);
}
.page-about .prose p{
  margin:0 0 1.15em;
  font-size:16px;
  line-height:1.8;
}
.page-about .prose p:last-child{margin-bottom:0;}
.page-about .about-points{
  display:grid;
  gap:10px;
  margin:22px 0 0;
  padding:0;
  list-style:none;
}
.page-about .about-points li{
  position:relative;
  padding:11px 14px 11px 34px;
  font-size:15px;
  line-height:1.7;
  background:rgba(255,255,255,.72);
  clip-path:var(--chamfer);
}
.page-about .about-points li::before{
  content:"";
  position:absolute;
  left:15px;
  top:19px;
  width:8px;
  height:8px;
  background:var(--sky-500);
  transform:rotate(45deg);
}

.page-about .about-figure{margin:0;}
.page-about .about-figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
  clip-path:var(--chamfer);
  background:var(--sky-100);
}
.page-about .about-figure__cap{
  display:block;
  margin-top:10px;
  padding-left:10px;
  border-left:2px solid var(--barley-400);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--ink-500);
}

@media (min-width:900px){
  .page-about .about-split{
    grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);
    gap:clamp(32px,5vw,58px);
    align-items:start;
  }
  .page-about .about-split .about-split__text{margin-top:34px;}
}

/* 时间轴 */
.page-about .about-timeline{
  margin:clamp(28px,4vw,40px) 0 0;
  padding:0 0 0 26px;
  list-style:none;
  border-left:1px solid var(--about-line);
  display:grid;
  gap:26px;
}
.page-about .about-node{position:relative;}
.page-about .about-node::before{
  content:"";
  position:absolute;
  left:-32px;
  top:9px;
  width:11px;
  height:11px;
  background:var(--red-500);
  transform:rotate(45deg);
  box-shadow:0 0 0 4px rgba(253,253,251,.95);
}
.page-about .about-node__year{
  margin:0 0 7px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--ink-500);
}
.page-about .about-node__card{
  padding:16px 18px;
  background:#fff;
  border:1px solid rgba(11,62,111,.14);
  clip-path:var(--chamfer);
  transition:border-color 120ms var(--ease),background 150ms var(--ease);
}
.page-about .about-node__card:hover,
.page-about .about-node__card:focus-within{
  border-color:var(--sky-500);
  background:#FBFDFF;
}
.page-about .about-node__card h3{
  margin:0 0 7px;
  font-size:17px;
  font-weight:600;
  line-height:1.45;
}
.page-about .about-node__card p{
  margin:0;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-500);
}
.page-about .about-node__more{
  margin-top:0;
  max-height:0;
  overflow:hidden;
  opacity:0;
  font-size:14px;
  line-height:1.7;
  color:var(--sky-900);
  transition:max-height 200ms var(--ease),opacity 200ms var(--ease),margin-top 200ms var(--ease);
}
.page-about .about-node__card:hover .about-node__more,
.page-about .about-node__card:focus-within .about-node__more{
  max-height:8em;
  opacity:1;
  margin-top:11px;
}
@media (hover:none){
  .page-about .about-node__more{max-height:8em;opacity:1;margin-top:11px;}
}

@media (min-width:900px){
  .page-about .about-timeline{padding-left:46px;gap:34px;}
  .page-about .about-node{width:58%;}
  .page-about .about-node--wide{width:78%;}
  .page-about .about-node--right{margin-left:auto;}
  .page-about .about-node::before{left:-50px;top:10px;}
}

/* 团队 */
.page-about .about-team{
  display:grid;
  gap:30px;
  margin-top:clamp(26px,4vw,38px);
}
.page-about .about-bar{
  display:flex;
  gap:3px;
  height:58px;
  margin:0;
}
.page-about .about-bar__seg{
  display:flex;
  align-items:center;
  justify-content:center;
  clip-path:var(--chamfer);
  font-family:var(--font-mono);
  font-size:15px;
  letter-spacing:.04em;
  transition:filter 150ms var(--ease);
}
.page-about .about-bar__seg:hover{filter:brightness(1.1);}
.page-about .about-bar__seg--edit{flex:22;background:var(--sky-500);color:#fff;}
.page-about .about-bar__seg--data{flex:18;background:var(--glacier-500);color:#fff;}
.page-about .about-bar__seg--media{flex:6;background:var(--barley-400);color:var(--ink-900);}

.page-about .about-legend{
  display:grid;
  gap:13px;
  margin:18px 0 0;
  padding:0;
  list-style:none;
}
.page-about .about-legend li{
  display:grid;
  grid-template-columns:12px 1fr;
  gap:10px;
  font-size:14.5px;
  line-height:1.75;
  color:var(--ink-500);
}
.page-about .about-legend b{color:var(--ink-900);font-weight:600;}
.page-about .about-legend__dot{
  width:12px;
  height:12px;
  margin-top:7px;
  clip-path:var(--chamfer);
}
.page-about .about-legend__dot--edit{background:var(--sky-500);}
.page-about .about-legend__dot--data{background:var(--glacier-500);}
.page-about .about-legend__dot--media{background:var(--barley-400);}
.page-about .about-legend__dot--writer{background:var(--red-500);}

@media (min-width:900px){
  .page-about .about-team{
    grid-template-columns:minmax(0,1fr) minmax(0,1fr);
    gap:clamp(32px,5vw,54px);
    align-items:start;
  }
  .page-about .about-figure--wide{margin-top:46px;}
}

/* 数据流程 */
.page-about .about-flow{
  display:grid;
  gap:14px;
  margin:clamp(26px,4vw,36px) 0 0;
  padding:0;
  list-style:none;
}
.page-about .about-flow__step{
  padding:16px 18px;
  background:rgba(230,242,255,.6);
  clip-path:var(--chamfer);
  transition:background 150ms var(--ease);
}
.page-about .about-flow__step:hover{background:rgba(232,181,74,.18);}
.page-about .about-flow__num{
  display:block;
  margin-bottom:7px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--red-500);
}
.page-about .about-flow__step h3{
  margin:0 0 6px;
  font-size:17px;
  font-weight:600;
}
.page-about .about-flow__step p{
  margin:0;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-500);
}

.page-about .about-stats{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
  margin-top:22px;
}
.page-about .about-stat{
  padding:15px 14px;
  background:#fff;
  border:1px solid rgba(11,62,111,.14);
  clip-path:var(--chamfer);
}
.page-about .about-stat__num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(22px,3vw,27px);
  line-height:1.15;
  letter-spacing:-.01em;
  color:var(--sky-900);
}
.page-about .about-stat__label{
  display:block;
  margin-top:7px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--ink-500);
}
.page-about .about-note{
  margin:18px 0 0;
  padding-left:12px;
  border-left:2px solid var(--glacier-500);
  font-size:14px;
  line-height:1.75;
  color:var(--ink-500);
}

@media (min-width:820px){
  .page-about .about-flow{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
  .page-about .about-stats{grid-template-columns:repeat(4,minmax(0,1fr));}
}

/* 合作 */
.page-about .about-coop{
  display:grid;
  gap:28px;
  margin-top:clamp(26px,4vw,38px);
}
.page-about .about-counts{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
}
.page-about .about-count{
  padding:16px;
  background:var(--sky-900);
  color:#fff;
  clip-path:var(--chamfer);
}
.page-about .about-count--red{background:var(--red-500);}
.page-about .about-count__num{
  display:block;
  font-family:var(--font-mono);
  font-size:32px;
  line-height:1;
}
.page-about .about-count__label{
  display:block;
  margin-top:9px;
  font-size:12.5px;
  letter-spacing:.06em;
  color:#CFE4FA;
}
.page-about .about-count--red .about-count__label{color:#FBE3E3;}

.page-about .about-forms{
  display:grid;
  gap:0;
  margin:24px 0 0;
  padding:0;
  list-style:none;
  border-top:1px solid var(--about-line);
}
.page-about .about-forms li{
  padding:16px 0;
  border-bottom:1px solid var(--about-line);
}
.page-about .about-forms h3{
  margin:0 0 6px;
  font-size:16px;
  font-weight:600;
}
.page-about .about-forms p{
  margin:0;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-500);
}

@media (min-width:900px){
  .page-about .about-coop{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    gap:clamp(32px,5vw,56px);
    align-items:start;
  }
  .page-about .about-coop .about-figure{margin-top:26px;}
}

/* 三条原则 */
.page-about .about-chapter--last{padding-bottom:clamp(28px,4vw,48px);}
.page-about .about-credos{
  margin:clamp(26px,4vw,38px) 0 0;
  padding:0;
  list-style:none;
  border-top:1px solid var(--about-line);
  max-width:900px;
}
.page-about .about-credos li{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:14px;
  padding:20px 0;
  border-bottom:1px solid var(--about-line);
}
.page-about .about-credos__num{
  padding-top:4px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--red-500);
}
.page-about .about-credos h3{
  margin:0 0 7px;
  font-size:18px;
  font-weight:600;
  line-height:1.45;
}
.page-about .about-credos p{
  margin:0;
  font-size:15px;
  line-height:1.78;
  color:var(--ink-500);
}

/* 收束带 */
.page-about .about-close{
  position:relative;
  z-index:1;
  margin-top:clamp(20px,3vw,34px);
  padding-block:clamp(34px,5vw,58px);
  background:linear-gradient(135deg,rgba(230,242,255,.9) 0%,rgba(253,253,251,.55) 55%,rgba(255,243,214,.92) 100%);
}
.page-about .about-close__inner{max-width:900px;}
.page-about .about-close__title{
  margin:0;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(22px,3.4vw,34px);
  line-height:1.3;
  letter-spacing:-.01em;
}
.page-about .about-close__text{
  margin:14px 0 0;
  max-width:56ch;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-500);
}
.page-about .about-close__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.page-about .btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  clip-path:var(--chamfer);
  transition:background 150ms var(--ease),color 150ms var(--ease),border-color 150ms var(--ease);
}
.page-about .btn--sky{
  background:var(--sky-500);
  border:1px solid var(--sky-500);
  color:#fff;
}
.page-about .btn--sky:hover{background:var(--sky-900);border-color:var(--sky-900);}
.page-about .btn--ghost{
  background:transparent;
  border:1px solid rgba(11,62,111,.32);
  color:var(--sky-900);
}
.page-about .btn--ghost:hover{border-color:var(--sky-500);background:rgba(230,242,255,.7);}
.page-about .about-close__back{margin:20px 0 0;font-size:14px;}
.page-about .link-underline{
  color:var(--sky-900);
  text-decoration:none;
  border-bottom:1px solid rgba(11,62,111,.28);
  transition:border-color 180ms var(--ease);
}
.page-about .link-underline:hover{border-bottom-color:var(--sky-500);}

@media (prefers-reduced-motion:reduce){
  .page-about *,
  .page-about *::before,
  .page-about *::after{transition-duration:0ms !important;}
}
<<<END>>>