.page-about{
  --ab-rail:96px;
  --ab-line:rgba(31,27,24,.13);
  --ab-gold-line:rgba(217,164,65,.55);
  position:relative;
  background:var(--rice);
  color:var(--ink);
  overflow-x:clip;
}

.page-about .breadcrumb{
  padding-top:clamp(14px,2vw,22px);
  font-size:13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  padding:clamp(18px,3vw,30px) 0 clamp(28px,4.5vw,54px);
}
.page-about .about-hero::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(120% 82% at 88% 0%, rgba(217,164,65,.18), transparent 62%),
    repeating-linear-gradient(90deg, rgba(110,106,99,.09) 0 1px, transparent 1px 72px);
}
.page-about .about-hero__grid{
  display:grid;
  gap:clamp(16px,3vw,30px);
}
.page-about .about-hero__lead h1{
  font-family:var(--font-display);
  font-size:clamp(2.1rem,6vw,4.4rem);
  line-height:1.06;
  letter-spacing:-.02em;
  margin:10px 0 16px;
  color:var(--ink);
  max-width:16ch;
}
.page-about .about-hero__dek{
  margin:0;
  max-width:56ch;
  font-size:clamp(15px,.7vw + 13px,17.5px);
  line-height:1.8;
  color:var(--rock);
}
.page-about .about-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.page-about .about-hero__panel{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:clamp(16px,2.6vw,24px);
  background:linear-gradient(152deg,var(--red) 0%,var(--red-deep) 100%);
  color:var(--rice);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
  box-shadow:0 20px 44px -30px rgba(142,31,27,.9);
}
.page-about .about-hero__vert{
  align-self:flex-end;
  writing-mode:vertical-rl;
  text-orientation:mixed;
  height:86px;
  font-size:11px;
  letter-spacing:.3em;
  color:var(--gold-light);
}
.page-about .about-figures{
  list-style:none;
  margin:auto 0 0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:rgba(247,240,227,.26);
  border:1px solid rgba(247,240,227,.26);
}
.page-about .fig{
  display:flex;
  flex-direction:column;
  gap:3px;
  padding:12px 12px 14px;
}
.page-about .fig__num{
  font-size:clamp(21px,3vw,29px);
  line-height:1;
  color:var(--gold-light);
  font-weight:700;
}
.page-about .fig__label{
  font-size:12px;
  letter-spacing:.05em;
  color:rgba(247,240,227,.84);
}
@media (min-width:920px){
  .page-about .about-hero__grid{
    grid-template-columns:minmax(0,1.42fr) minmax(0,.58fr);
    align-items:stretch;
  }
}
@media (max-width:919px){
  .page-about .about-hero__vert{
    writing-mode:horizontal-tb;
    height:auto;
    align-self:flex-start;
    letter-spacing:.18em;
  }
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc{
  border-top:1px solid var(--ab-line);
  border-bottom:1px solid var(--ab-line);
  background:var(--paper);
  padding-top:10px;
  padding-bottom:12px;
}
.page-about .about-toc .toc-title{
  margin:0;
  font-size:12px;
  letter-spacing:.22em;
  color:var(--rock);
}
.page-about .about-toc .toc-list{
  display:flex;
  gap:8px;
  margin:8px 0 0;
  padding:0 0 4px;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:thin;
}
.page-about .about-toc .toc-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 12px;
  border:1px solid var(--ab-line);
  border-radius:999px;
  font-size:13px;
  color:var(--rock);
  text-decoration:none;
  white-space:nowrap;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease);
}
.page-about .about-toc .toc-link .mono{
  font-size:11px;
  color:var(--gold-deep);
}
.page-about .about-toc .toc-link:hover{
  border-color:var(--gold);
  color:var(--ink);
}
.page-about .about-toc .toc-link[data-active="true"]{
  background:var(--red);
  border-color:var(--red);
  color:var(--rice);
}
.page-about .about-toc .toc-link[data-active="true"] .mono{
  color:var(--gold-light);
}

/* ---------- 时间轴骨架 ---------- */
.page-about .about-flow{
  padding-bottom:clamp(36px,6vw,72px);
}
.page-about .tl-item{
  position:relative;
  display:grid;
  gap:clamp(6px,1.6vw,14px);
  padding:clamp(26px,4vw,48px) 0;
  border-top:1px solid var(--ab-line);
  scroll-margin-top:24px;
}
.page-about .tl-rail{
  display:flex;
  align-items:center;
  gap:10px;
}
.page-about .tl-num{
  display:inline-block;
  padding:3px 7px;
  border:1px solid var(--ab-gold-line);
  border-radius:3px;
  font-size:clamp(13px,1.5vw,16px);
  font-weight:700;
  line-height:1;
  color:var(--gold-deep);
}
.page-about .tl-note{display:none;}
.page-about .tl-body h2{
  font-family:var(--font-display);
  font-size:clamp(1.5rem,3.4vw,2.35rem);
  line-height:1.16;
  letter-spacing:-.01em;
  margin:0 0 14px;
  max-width:22ch;
}
.page-about .tl-body p{
  margin:0 0 14px;
  max-width:66ch;
  font-size:clamp(15px,.55vw + 13.6px,17px);
  line-height:1.82;
  color:var(--ink);
}
.page-about .tl-body .tl-lead{
  font-size:clamp(15.5,1vw + 13px,18px);
  color:var(--ink);
  max-width:62ch;
}
.page-about .tl-body .about-link + .about-link{margin-left:18px;}
@media (min-width:860px){
  .page-about .tl-item{
    grid-template-columns:var(--ab-rail) minmax(0,1fr);
    gap:clamp(22px,3vw,44px);
  }
  .page-about .tl-rail{
    flex-direction:column;
    align-items:center;
    position:relative;
  }
  .page-about .tl-rail::after{
    content:"";
    position:absolute;
    top:36px;
    bottom:-48px;
    left:50%;
    width:1px;
    background:linear-gradient(180deg,var(--ab-gold-line),rgba(217,164,65,0));
  }
  .page-about .tl-note{
    display:block;
    margin-top:12px;
    writing-mode:vertical-rl;
    text-orientation:mixed;
    font-size:11px;
    letter-spacing:.28em;
    color:var(--rock);
  }
}

/* ---------- 列表 ---------- */
.page-about .about-list{
  list-style:none;
  margin:18px 0 20px;
  padding:0;
  display:grid;
  gap:10px;
  max-width:66ch;
}
.page-about .about-list li{
  position:relative;
  padding-left:22px;
  font-size:clamp(14.5px,.5vw + 13.4px,16.5px);
  line-height:1.78;
  color:var(--rock);
}
.page-about .about-list li::before{
  content:"";
  position:absolute;
  left:2px;
  top:.75em;
  width:8px;
  height:8px;
  background:var(--gold);
  transform:rotate(45deg);
}
.page-about .about-list strong{
  color:var(--ink);
  font-weight:700;
}

/* ---------- 斜线轨迹 ---------- */
.page-about .about-slash{
  height:1px;
  margin:clamp(18px,3.4vw,34px) 0 clamp(14px,2.6vw,26px);
  background:linear-gradient(90deg,transparent,var(--ab-gold-line) 18%,var(--ab-gold-line) 82%,transparent);
  transform:rotate(-8deg);
  transform-origin:left center;
}

/* ---------- 三条原则 ---------- */
.page-about .principles{
  display:grid;
  gap:14px;
}
.page-about .principle{
  display:flex;
  flex-direction:column;
  background:var(--paper);
  border:1px solid var(--ab-line);
  border-top:3px solid var(--gold);
  border-radius:var(--radius-panel);
  padding:16px 16px 12px;
  box-shadow:0 16px 32px -28px rgba(31,27,24,.8);
}
.page-about .principle--moss{border-top-color:var(--moss);}
.page-about .principle--clay{border-top-color:var(--clay);}
.page-about .principle--gold{border-top-color:var(--gold);}
.page-about .principle__idx{
  display:block;
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--rock);
}
.page-about .principle h3{
  font-family:var(--font-display);
  font-size:clamp(1.12rem,1.8vw,1.32rem);
  margin:6px 0 10px;
  color:var(--ink);
}
.page-about .principle p{
  margin:0 0 12px;
  font-size:14.5px;
  line-height:1.76;
  color:var(--rock);
}
.page-about .principle details{
  margin-top:auto;
  padding-top:10px;
  border-top:1px dashed var(--ab-line);
}
.page-about .principle summary{
  display:flex;
  align-items:center;
  gap:6px;
  padding:4px 0;
  list-style:none;
  cursor:pointer;
  font-size:13px;
  font-weight:600;
  color:var(--red);
}
.page-about .principle summary::-webkit-details-marker{display:none;}
.page-about .principle summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--font-mono);
  color:var(--gold-deep);
}
.page-about .principle details[open] summary::after{content:"−";}
.page-about .principle details p{
  margin:8px 0 10px;
  font-size:14px;
  line-height:1.78;
  color:var(--ink);
}
@media (min-width:880px){
  .page-about .principles{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:18px;
    align-items:start;
  }
  .page-about .principle:nth-child(2){margin-top:30px;}
  .page-about .principle:nth-child(3){margin-top:60px;}
}

/* ---------- 图片 ---------- */
.page-about .ab-figure{
  margin:clamp(20px,3.4vw,36px) 0 0;
  border:1px solid var(--ab-line);
  border-radius:var(--radius-panel-lg);
  overflow:hidden;
  background:var(--paper);
}
.page-about .ab-figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .ab-figure figcaption{
  padding:11px 15px 13px;
  border-top:1px solid var(--ab-line);
  background:linear-gradient(180deg,var(--paper),rgba(217,164,65,.08));
  font-size:13px;
  line-height:1.7;
  color:var(--rock);
}

/* ---------- 团队分工 ---------- */
.page-about .about-split{
  display:grid;
  gap:clamp(16px,3vw,30px);
  margin-top:6px;
}
.page-about .team{
  display:grid;
  gap:0;
}
.page-about .team-row{
  display:grid;
  gap:4px 14px;
  padding:15px 0;
  border-bottom:1px dashed var(--ab-line);
}
.page-about .team-row:first-child{padding-top:0;}
.page-about .team-row__idx{
  font-size:13px;
  font-weight:700;
  color:var(--gold-deep);
  padding-top:3px;
}
.page-about .tl-body .team-row h3{
  font-family:var(--font-display);
  font-size:1.14rem;
  margin:0 0 6px;
  color:var(--ink);
}
.page-about .tl-body .team-row p{
  margin:0;
  font-size:14.5px;
  line-height:1.78;
  color:var(--rock);
}
.page-about .about-split .ab-figure{margin:0;}
@media (min-width:600px){
  .page-about .team-row{grid-template-columns:52px minmax(0,1fr);}
}
@media (min-width:820px){
  .page-about .about-split{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    align-items:start;
  }
}

/* ---------- 巡检刻度 ---------- */
.page-about .ruler{
  list-style:none;
  margin:22px 0 6px;
  padding:0;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px 0;
  border-top:2px solid var(--rock);
  max-width:66ch;
}
.page-about .ruler li{
  position:relative;
  padding:15px 6px 0 8px;
  border-left:1px solid var(--ab-line);
  font-size:12px;
  line-height:1.5;
  color:var(--rock);
}
.page-about .ruler li::before{
  content:"";
  position:absolute;
  top:-8px;
  left:0;
  width:1px;
  height:9px;
  background:var(--rock);
}
.page-about .ruler li .mono{
  display:block;
  margin-bottom:3px;
  font-size:14.5px;
  font-weight:700;
  color:var(--ink);
}
.page-about .ruler li.is-now .mono{color:var(--red);}
.page-about .ruler li.is-now::before{width:2px;background:var(--red);}
@media (min-width:640px){
  .page-about .ruler{grid-template-columns:repeat(6,minmax(0,1fr));}
}

.page-about .facts{
  display:grid;
  gap:12px;
  margin-top:22px;
  max-width:66ch;
}
.page-about .fact{
  padding:12px 14px;
  border-left:3px solid var(--moss);
  border-radius:0 var(--radius-panel) var(--radius-panel) 0;
  background:rgba(94,122,90,.1);
}
.page-about .fact b{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(17px,1.6vw,20px);
  font-weight:700;
  color:var(--ink-green);
  line-height:1.3;
}
.page-about .fact span{
  display:block;
  margin-top:4px;
  font-size:13px;
  line-height:1.65;
  color:var(--rock);
}
@media (min-width:720px){
  .page-about .facts{grid-template-columns:repeat(3,minmax(0,1fr));}
}

/* ---------- 使用人群 ---------- */
.page-about .audience{
  display:grid;
  gap:14px;
  margin-top:20px;
}
.page-about .aud-card{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:16px;
  background:var(--paper);
  border:1px solid var(--ab-line);
  border-radius:var(--radius-panel);
  box-shadow:0 14px 28px -28px rgba(31,27,24,.75);
}
.page-about .aud-card h3{
  font-family:var(--font-display);
  font-size:1.05rem;
  margin:0;
  color:var(--ink);
}
.page-about .tl-body .aud-card p{
  margin:0;
  font-size:14px;
  line-height:1.76;
  color:var(--rock);
}
.page-about .aud-card .about-link{margin-top:auto;}
@media (min-width:680px){
  .page-about .audience{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1060px){
  .page-about .audience{grid-template-columns:repeat(4,minmax(0,1fr));}
}

/* ---------- 正文内链接 ---------- */
.page-about .about-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  width:max-content;
  padding-bottom:2px;
  font-size:13.5px;
  font-weight:600;
  color:var(--red);
  text-decoration:none;
  border-bottom:1px solid rgba(200,50,43,.35);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.page-about .about-link::after{content:"→";}
.page-about .about-link:hover,
.page-about .about-link:focus-visible{
  color:var(--red-deep);
  border-bottom-color:var(--red-deep);
}

/* ---------- 备案与联络 ---------- */
.page-about .region-panel{
  display:grid;
  gap:18px;
  margin-top:16px;
  padding:clamp(18px,3vw,30px);
  background:linear-gradient(158deg,var(--ink-green) 0%,#102a23 100%);
  color:var(--rice);
  border-radius:var(--radius-panel-lg);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.page-about .region-info{
  display:grid;
  gap:10px;
  margin:0 0 16px;
}
.page-about .region-info dt{
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--gold-light);
}
.page-about .region-info dd{
  margin:3px 0 0;
  font-size:14px;
  line-height:1.65;
  color:var(--rice);
  word-break:break-word;
}
.page-about .region-info a{
  color:var(--rice);
  text-decoration:underline;
  text-underline-offset:3px;
}
.page-about .region-info a:hover{color:var(--gold-light);}
.page-about .region-line{
  margin:0;
  font-size:12.5px;
  letter-spacing:.04em;
  color:rgba(247,240,227,.72);
}
.page-about .region-line .mono{color:var(--gold-light);}
.page-about .region-panel .ab-figure{
  margin:0;
  background:rgba(247,240,227,.06);
  border-color:rgba(247,240,227,.18);
}
.page-about .region-panel .ab-figure figcaption{
  background:none;
  border-top-color:rgba(247,240,227,.18);
  color:rgba(247,240,227,.72);
}
@media (min-width:520px){
  .page-about .region-info{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 20px;}
}
@media (min-width:760px){
  .page-about .region-panel{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    align-items:center;
    gap:24px;
  }
}

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible{
  outline:2px solid var(--gold-deep);
  outline-offset:3px;
}

@media (prefers-reduced-motion:reduce){
  .page-about *{
    transition-duration:.01ms !important;
    animation-duration:.01ms !important;
  }
  .page-about .about-slash{transform:none;}
}