.page-about{
  --about-axis-x: clamp(74px, 15vw, 108px);
  --about-stack: 6px 6px 0 -1px rgba(23,42,69,.92);
}

.page-about .section + .section{
  border-top:1px solid var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  padding-block:clamp(14px,3vw,26px) clamp(40px,6vw,76px);
}
.page-about .about-hero__grid{
  display:grid;
  gap:clamp(24px,4vw,48px);
  align-items:start;
}
.page-about .about-hero__title{
  margin:14px 0 0;
  font-size:clamp(2rem,5.6vw,3.45rem);
  line-height:1.1;
  letter-spacing:-.025em;
  font-weight:700;
}
.page-about .about-hero__title em{
  font-style:normal;
  color:var(--gold);
}
.page-about .about-hero__copy .lede{
  margin:18px 0 0;
  max-width:52ch;
}
.page-about .about-facts{
  list-style:none;
  margin:clamp(22px,3vw,30px) 0 0;
  padding:1px;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(88px,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.page-about .about-facts li{
  background:var(--ink-2);
  padding:14px 14px 16px;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.page-about .about-facts b{
  font-family:var(--mono);
  font-size:clamp(1.35rem,3.6vw,1.75rem);
  line-height:1;
  font-weight:500;
  color:var(--gold-soft);
  font-variant-numeric:tabular-nums;
}
.page-about .about-facts span{
  font-size:.76rem;
  line-height:1.5;
  color:var(--muted);
}
.page-about .about-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:clamp(20px,3vw,28px);
}
.page-about .about-hero__media{
  position:relative;
  margin:0;
}
.page-about .about-hero__media img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-hero__media::after{
  content:"";
  position:absolute;
  right:-8px;
  bottom:-8px;
  width:60%;
  height:48%;
  border-right:2px solid rgba(230,180,92,.5);
  border-bottom:2px solid rgba(230,180,92,.5);
  border-radius:0 0 var(--radius) 0;
  pointer-events:none;
}

/* ---------- 章节头 ---------- */
.page-about .about-head{
  display:grid;
  gap:10px;
  align-content:start;
  margin-bottom:clamp(20px,3vw,32px);
}
.page-about .about-head .idx{
  font-size:clamp(1.6rem,4vw,2.2rem);
  line-height:1;
  color:var(--line-strong);
  font-variant-numeric:tabular-nums;
}
.page-about .about-head h2{
  margin:0;
  font-size:clamp(1.45rem,3.4vw,2.1rem);
  line-height:1.25;
  letter-spacing:-.012em;
}

/* ---------- 01 起步 ---------- */
.page-about .about-origin__grid{
  display:grid;
  gap:clamp(20px,4vw,44px);
  align-items:start;
}
.page-about .about-origin__body p{
  margin:0;
  color:var(--text);
  line-height:1.85;
}
.page-about .about-quote{
  margin:6px 0 0;
  border-left:3px solid var(--gold);
  padding:20px 22px;
  border-radius:0 var(--radius) var(--radius) 0;
}
.page-about .about-quote__kicker{
  margin:0 0 8px;
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--clay);
}
.page-about .about-quote__text{
  margin:0;
  font-size:1.02rem;
  line-height:1.78;
  color:var(--ink);
}

/* ---------- 02 三组导航 ---------- */
.page-about .about-trio-lead p{
  margin:0;
  line-height:1.85;
  color:var(--muted);
}
.page-about .about-trio{
  display:grid;
  gap:14px;
  margin-top:clamp(22px,3vw,30px);
}
.page-about .about-trio__item{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:18px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(23,42,69,.72),rgba(13,26,46,.9));
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.page-about .about-trio__item:nth-child(1){border-top:2px solid var(--gold);}
.page-about .about-trio__item:nth-child(2){border-top:2px solid var(--celadon);}
.page-about .about-trio__item:nth-child(3){border-top:2px solid var(--clay);}
.page-about .about-trio__item:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
}
.page-about .about-trio__item b{
  font-family:var(--mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.1em;
  color:var(--gold);
}
.page-about .about-trio__item h3{
  margin:0;
  font-size:1.05rem;
  line-height:1.4;
}
.page-about .about-trio__item p{
  margin:0;
  font-size:.92rem;
  line-height:1.78;
  color:var(--muted);
}
.page-about .about-pathmap-wrap{
  margin-top:clamp(26px,4vw,40px);
  padding:clamp(16px,3vw,26px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(13,26,46,.6);
}
.page-about .about-pathmap{
  display:block;
  width:100%;
  max-width:520px;
  height:auto;
  margin:0 auto;
}
.page-about .about-pathmap .pm-spine{
  fill:none;
  stroke:var(--line);
  stroke-width:1.5;
  stroke-dasharray:3 5;
}
.page-about .about-pathmap .pm-old circle{
  fill:var(--ink-3);
  stroke:var(--line-strong);
  stroke-width:1.5;
}
.page-about .about-pathmap .pm-flow path{
  fill:none;
  stroke:var(--gold);
  stroke-width:1.6;
  opacity:.85;
}
.page-about .about-pathmap .pm-new circle{
  fill:rgba(99,199,155,.2);
  stroke:var(--celadon);
  stroke-width:2;
}
.page-about .about-pathmap__legend{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:8px 20px;
  margin:14px 0 0;
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--muted);
}
.page-about .about-pathmap__legend span::before{
  content:"";
  display:inline-block;
  width:8px;
  height:8px;
  border-radius:50%;
  margin-right:7px;
  vertical-align:middle;
}
.page-about .about-pathmap__legend span:first-child::before{background:var(--line-strong);}
.page-about .about-pathmap__legend span:last-child::before{background:var(--celadon);}
.page-about .about-trio-note{
  margin:clamp(18px,3vw,26px) 0 0;
  padding-left:14px;
  border-left:2px solid var(--celadon);
  font-size:.95rem;
  line-height:1.85;
  color:var(--muted);
}

/* ---------- 03 时间线 ---------- */
.page-about .about-era__figure{
  margin:0 0 clamp(26px,4vw,40px);
}
.page-about .about-era__figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-timeline{
  list-style:none;
  margin:0;
  padding:0;
}
.page-about .tl-item{
  position:relative;
  padding-left:var(--about-axis-x);
  padding-bottom:clamp(14px,2.4vw,22px);
}
.page-about .tl-item:not(:last-child)::after{
  content:"";
  position:absolute;
  top:20px;
  bottom:0;
  left:calc(var(--about-axis-x) - 16px);
  width:1px;
  background:linear-gradient(180deg,var(--line-strong),rgba(42,59,85,.15));
}
.page-about .tl-item::before{
  content:"";
  position:absolute;
  top:16px;
  left:calc(var(--about-axis-x) - 20px);
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--ink);
  border:2px solid var(--line-strong);
}
.page-about .tl-item[data-state="now"]::before{
  background:var(--celadon);
  border-color:var(--celadon);
  box-shadow:0 0 0 4px rgba(99,199,155,.16);
}
.page-about .tl-year{
  position:absolute;
  left:0;
  top:11px;
  width:calc(var(--about-axis-x) - 30px);
  text-align:right;
  font-family:var(--mono);
  font-size:.82rem;
  letter-spacing:.04em;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
}
.page-about .tl-card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--ink-2);
  box-shadow:var(--about-stack);
  transition:border-color .2s var(--ease);
}
.page-about .tl-card[open]{
  border-color:rgba(230,180,92,.45);
}
.page-about .tl-card > summary{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding:14px 16px;
  margin:0;
  cursor:pointer;
  list-style:none;
  font-size:1rem;
  font-weight:600;
  line-height:1.5;
}
.page-about .tl-card > summary::-webkit-details-marker{display:none;}
.page-about .tl-card > summary::after{
  content:"+";
  flex:none;
  font-family:var(--mono);
  font-size:1.1rem;
  line-height:1;
  color:var(--gold);
}
.page-about .tl-card[open] > summary::after{content:"–";}
.page-about .tl-card > summary:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
  border-radius:var(--radius);
}
.page-about .tl-card__body{
  padding:0 16px 16px;
  color:var(--muted);
  font-size:.94rem;
  line-height:1.82;
}
.page-about .tl-card__body p{margin:0;}

/* ---------- 04 团队 ---------- */
.page-about .team-grid{
  display:grid;
  gap:clamp(22px,4vw,40px);
  align-items:start;
}
.page-about .team-grid__figure{
  margin:0;
}
.page-about .team-grid__figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .team-tabs .tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:18px;
}
.page-about .team-tabs .tabs__btn{
  font-family:var(--mono);
  font-size:.78rem;
  letter-spacing:.04em;
  padding:9px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--ink-2);
  color:var(--muted);
  cursor:pointer;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.page-about .team-tabs .tabs__btn:hover{
  color:var(--text);
  border-color:var(--line-strong);
}
.page-about .team-tabs .tabs__btn[aria-selected="true"]{
  color:var(--ink);
  background:var(--gold);
  border-color:var(--gold);
  font-weight:600;
}
.page-about .team-tabs .tabs__btn:focus-visible{
  outline:2px solid var(--gold-soft);
  outline-offset:2px;
}
.page-about .team-panel h3{
  margin:0 0 10px;
  font-size:1.1rem;
  line-height:1.4;
}
.page-about .team-panel p{
  margin:0;
  font-size:.95rem;
  line-height:1.82;
  color:var(--muted);
}
.page-about .team-panel ul{
  margin:12px 0 0;
  padding-left:1.1em;
  font-size:.94rem;
  line-height:1.85;
  color:var(--muted);
}
.page-about .team-panel li::marker{color:var(--gold);}
.page-about .team-tabs .tabs__panel + .tabs__panel{
  margin-top:20px;
  padding-top:18px;
  border-top:1px dashed var(--line);
}

/* ---------- 05 做事方式 ---------- */
.page-about .about-way{
  display:grid;
  gap:14px;
}
.page-about .about-way__item{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:20px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--ink-2);
}
.page-about .about-way__item .mono{
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--celadon);
}
.page-about .about-way__item h3{
  margin:0;
  font-size:1.05rem;
  line-height:1.4;
}
.page-about .about-way__item p{
  margin:0;
  font-size:.93rem;
  line-height:1.8;
  color:var(--muted);
}

/* ---------- CTA ---------- */
.page-about .about-cta__inner{
  display:grid;
  gap:14px;
  padding:clamp(24px,4vw,44px);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 150% at 88% 0%,rgba(230,180,92,.16),transparent 58%),
    var(--ink-2);
}
.page-about .about-cta__inner h2{
  margin:0;
  font-size:clamp(1.4rem,3.2vw,1.9rem);
  line-height:1.3;
}
.page-about .about-cta__inner p{
  margin:0;
  max-width:58ch;
  line-height:1.85;
  color:var(--muted);
}
.page-about .about-cta__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:6px;
}

/* ---------- 断点 ---------- */
@media (max-width:559px){
  .page-about{--about-axis-x:62px;}
  .page-about .tl-year{font-size:.74rem;}
  .page-about .tl-card > summary{font-size:.95rem;padding:13px 14px;}
  .page-about .tl-card__body{padding:0 14px 14px;}
}

@media (min-width:700px){
  .page-about .about-trio{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-about .about-way{grid-template-columns:repeat(3,minmax(0,1fr));}
}

@media (min-width:920px){
  .page-about .about-hero__grid{
    grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
    gap:clamp(32px,5vw,68px);
  }
  .page-about .about-origin__grid{
    grid-template-columns:minmax(0,.6fr) minmax(0,1fr);
    gap:clamp(32px,5vw,64px);
  }
  .page-about .team-grid{
    grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
    gap:clamp(28px,4vw,52px);
  }
}
<<<END>>>