.page-about{
  --about-pad:clamp(20px,4.2vw,52px);
  --about-r:26px;
  overflow-x:hidden;
}

.page-about .shell{
  padding-inline:var(--about-pad);
}

.page-about .breadcrumbs{
  margin-top:var(--s4);
}

/* ---------- 坐标宣言 ---------- */
.page-about .about-manifesto{
  padding-block:var(--s5) var(--s7);
}

.page-about .about-manifesto__grid{
  display:grid;
  gap:var(--s5);
  align-items:end;
}

.page-about .about-manifesto__title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(34px,6.2vw,76px);
  line-height:1.03;
  letter-spacing:-.025em;
  margin:var(--s2) 0 var(--s3);
  color:var(--mist);
}

.page-about .about-manifesto__title em{
  font-style:normal;
  color:var(--cyan);
  display:inline-block;
}

.page-about .about-manifesto__lead{
  margin:0;
  max-width:46ch;
  font-size:clamp(16px,1.9vw,18px);
  line-height:1.78;
  color:var(--text-muted);
}

.page-about .about-manifesto__figure{
  position:relative;
  margin:0;
  border-radius:var(--r-organic);
  overflow:hidden;
  background:var(--deep);
  box-shadow:var(--shadow-lift);
}

.page-about .about-manifesto__figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:14/9;
  object-fit:cover;
}

.page-about .about-manifesto__figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,19,31,0) 40%,rgba(5,19,31,.82) 100%);
  pointer-events:none;
}

.page-about .about-manifesto__cap{
  position:absolute;
  left:var(--s3);
  bottom:var(--s3);
  z-index:1;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ice);
}

.page-about .about-figures{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  margin-top:var(--s5);
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--about-r);
  overflow:hidden;
}

.page-about .about-figure{
  background:var(--deep);
  padding:var(--s3);
}

.page-about .about-figure__num{
  display:block;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(26px,3.6vw,40px);
  line-height:1;
  letter-spacing:.02em;
  color:var(--cyan);
  font-variant-numeric:tabular-nums;
}

.page-about .about-figure__label{
  display:block;
  margin-top:var(--s2);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.6;
  color:var(--text-muted);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline{
  padding-block:var(--s7);
}

.page-about .about-jump{
  display:flex;
  gap:var(--s2);
  list-style:none;
  margin:var(--s5) 0 0;
  padding:0 0 var(--s1);
  overflow-x:auto;
  scrollbar-width:thin;
}

.page-about .about-jump a{
  display:inline-block;
  white-space:nowrap;
  padding:8px 15px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--text-muted);
  text-decoration:none;
  border:1px solid var(--line);
  border-radius:999px;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible{
  color:var(--abyss);
  background:var(--cyan);
  border-color:var(--cyan);
}

.page-about .about-timeline__list{
  list-style:none;
  margin:var(--s5) 0 0;
  padding:0;
}

.page-about .about-timeline__item{
  position:relative;
  display:grid;
  gap:var(--s2);
  padding:0 0 var(--s6) var(--s5);
  scroll-margin-top:calc(var(--header-h) + 24px);
}

.page-about .about-timeline__item::after{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  bottom:0;
  width:1px;
  background:linear-gradient(180deg,rgba(124,154,170,.42),rgba(124,154,170,.06));
}

.page-about .about-timeline__item::before{
  content:"";
  position:absolute;
  left:-4.5px;
  top:10px;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 5px rgba(53,224,208,.14);
  z-index:1;
}

.page-about .about-timeline__item:last-child::before{
  background:var(--lime);
  box-shadow:0 0 0 5px rgba(182,255,60,.16);
}

.page-about .about-timeline__item:last-child::after{
  background:linear-gradient(180deg,rgba(124,154,170,.42),rgba(124,154,170,0) 70%);
}

.page-about .about-timeline__year{
  margin:0;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(30px,5vw,52px);
  line-height:1;
  letter-spacing:.02em;
  color:rgba(166,244,234,.34);
  font-variant-numeric:tabular-nums;
}

.page-about .about-timeline__body h3{
  margin:0 0 var(--s1);
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(20px,2.6vw,26px);
  line-height:1.28;
  color:var(--mist);
}

.page-about .about-timeline__body p{
  margin:0;
  max-width:56ch;
  line-height:1.78;
  color:var(--text-muted);
}

.page-about .about-timeline__item:target .about-timeline__body{
  outline:1px solid rgba(53,224,208,.45);
  outline-offset:12px;
  border-radius:14px;
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  padding-block:var(--s7);
}

.page-about .about-team__grid{
  display:grid;
  gap:var(--s5);
}

.page-about .about-team__title{
  margin:var(--s2) 0 var(--s3);
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(26px,3.8vw,42px);
  line-height:1.12;
  letter-spacing:-.015em;
  color:var(--mist);
}

.page-about .about-team__copy p{
  margin:0 0 var(--s3);
  max-width:52ch;
  line-height:1.78;
  color:var(--text-muted);
}

.page-about .about-team__chart{
  display:grid;
  gap:var(--s3);
  align-content:start;
}

.page-about .about-ring{
  position:relative;
  width:min(260px,100%);
  margin-inline:auto;
}

.page-about .about-ring__svg{
  display:block;
  width:100%;
  height:auto;
  transform:rotate(-90deg);
}

.page-about .about-ring__base{
  fill:none;
  stroke:rgba(124,154,170,.14);
  stroke-width:20;
}

.page-about .about-ring__seg{
  fill:none;
  stroke-width:20;
  transition:stroke-width .25s ease;
}

.page-about .about-ring__seg--a{stroke:var(--cyan);}
.page-about .about-ring__seg--b{stroke:var(--ice);}
.page-about .about-ring__seg--c{stroke:var(--coral);}
.page-about .about-ring__seg--d{stroke:var(--steel);}

.page-about .about-ring__center{
  position:absolute;
  inset:0;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  pointer-events:none;
}

.page-about .about-ring__total{
  font-family:var(--font-mono);
  font-size:34px;
  font-weight:600;
  line-height:1;
  color:var(--mist);
  font-variant-numeric:tabular-nums;
}

.page-about .about-ring__unit{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--text-muted);
}

.page-about .about-team__legend{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
}

.page-about .about-team__legend li{
  display:flex;
  align-items:center;
  gap:var(--s2);
  padding:10px 14px;
  border:1px solid transparent;
  border-radius:var(--r-sm);
  transition:background .2s ease,border-color .2s ease;
}

.page-about .about-team__legend li:hover{
  background:var(--surface-2);
  border-color:var(--line);
}

.page-about .about-team__dot{
  width:10px;
  height:10px;
  border-radius:3px;
  flex:none;
}

.page-about .about-team__dot--a{background:var(--cyan);}
.page-about .about-team__dot--b{background:var(--ice);}
.page-about .about-team__dot--c{background:var(--coral);}
.page-about .about-team__dot--d{background:var(--steel);}

.page-about .about-team__name{
  font-size:15px;
  color:var(--mist);
}

.page-about .about-team__count{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:600;
  color:var(--cyan);
  font-variant-numeric:tabular-nums;
}

.page-about .about-team__figure{
  margin:0;
  border-radius:var(--r-organic);
  overflow:hidden;
  background:var(--deep);
}

.page-about .about-team__figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:16/10;
  object-fit:cover;
}

.page-about .about-team__cap{
  display:block;
  padding:var(--s2) var(--s3);
  font-size:13px;
  line-height:1.7;
  color:var(--text-muted);
  border-top:1px solid var(--line);
}

/* ---------- 场馆合作带 ---------- */
.page-about .about-venues{
  padding-block:var(--s7);
}

.page-about .about-venues__figure{
  margin:var(--s5) 0 var(--s4);
  border-radius:var(--r-organic);
  overflow:hidden;
  background:var(--deep);
}

.page-about .about-venues__figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:3/2;
  object-fit:cover;
}

.page-about .about-rail{
  display:flex;
  gap:var(--s3);
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:var(--s1) 0 var(--s3);
  scrollbar-width:thin;
  scrollbar-color:var(--steel) transparent;
}

.page-about .about-rail__card{
  flex:0 0 76%;
  scroll-snap-align:start;
  padding:var(--s3);
  background:rgba(10,34,51,.72);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  display:flex;
  flex-direction:column;
  gap:var(--s1);
}

.page-about .about-rail__no{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--cyan);
}

.page-about .about-rail__card h3{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  font-size:18px;
  line-height:1.35;
  color:var(--mist);
}

.page-about .about-rail__card p{
  margin:0;
  font-size:14px;
  line-height:1.72;
  color:var(--text-muted);
}

.page-about .about-venues__note{
  margin:var(--s3) 0 0;
  max-width:62ch;
  line-height:1.78;
  color:var(--text-muted);
}

/* ---------- 工作方式 ---------- */
.page-about .about-practice{
  padding-block:var(--s7);
}

.page-about .about-practice__list{
  list-style:none;
  margin:var(--s5) 0 0;
  padding:0;
  display:grid;
  gap:var(--s4);
}

.page-about .about-practice__list li{
  padding-top:var(--s3);
  border-top:1px solid var(--line);
}

.page-about .about-practice__idx{
  display:inline-block;
  margin-bottom:var(--s2);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--coral);
}

.page-about .about-practice__list h3{
  margin:0 0 var(--s2);
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(19px,2.4vw,24px);
  line-height:1.3;
  color:var(--mist);
}

.page-about .about-practice__list p{
  margin:0;
  max-width:48ch;
  line-height:1.78;
  color:var(--text-muted);
}

.page-about .about-practice__cta{
  margin:var(--s5) 0 0;
  font-size:15px;
  color:var(--text-muted);
}

.page-about .about-practice__cta a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(53,224,208,.45);
}

.page-about .about-practice__cta a:hover{
  color:var(--ice);
  border-bottom-color:var(--ice);
}

/* ---------- 继续了解 ---------- */
.page-about .about-next{
  padding-block:var(--s6) var(--s8);
}

.page-about .about-next__grid{
  display:grid;
  gap:var(--s3);
  margin-top:var(--s5);
}

.page-about .about-next__card{
  display:flex;
  flex-direction:column;
  gap:var(--s2);
  padding:var(--s4) var(--s3);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  text-decoration:none;
  background:rgba(18,58,80,.28);
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible{
  border-color:rgba(53,224,208,.6);
  background:rgba(18,58,80,.58);
  transform:translateY(-2px);
}

.page-about .about-next__card--focus{
  background:linear-gradient(150deg,rgba(53,224,208,.16),rgba(10,34,51,.7) 62%);
  border-color:rgba(53,224,208,.42);
}

.page-about .about-next__card h3{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(17px,2.2vw,20px);
  line-height:1.42;
  color:var(--mist);
}

.page-about .about-next__go{
  margin-top:auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--coral);
}

/* ---------- 显现 ---------- */
.page-about [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s ease,transform .6s ease;
}

.page-about [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

@media (prefers-reduced-motion:reduce){
  .page-about [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }
  .page-about .about-next__card:hover,
  .page-about .about-next__card:focus-visible{
    transform:none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  .page-about .about-figures{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .about-rail__card{
    flex-basis:300px;
  }
  .page-about .about-next__grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media (min-width:900px){
  .page-about .about-manifesto__grid{
    grid-template-columns:1.05fr .95fr;
    gap:var(--s6);
  }
  .page-about .about-timeline__item{
    grid-template-columns:150px minmax(0,1fr);
    gap:var(--s4);
    padding-left:var(--s5);
  }
  .page-about .about-timeline__year{
    position:sticky;
    top:calc(var(--header-h) + 32px);
    align-self:start;
  }
  .page-about .about-team__grid{
    grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
    gap:var(--s5) var(--s6);
    align-items:start;
  }
  .page-about .about-team__copy{
    grid-column:1;
    grid-row:1;
  }
  .page-about .about-team__chart{
    grid-column:2;
    grid-row:1;
    padding-top:var(--s2);
  }
  .page-about .about-team__figure{
    grid-column:1/-1;
    grid-row:2;
  }
  .page-about .about-team__figure img{
    aspect-ratio:21/9;
  }
  .page-about .about-practice__list{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:var(--s5);
  }
  .page-about .about-next__grid{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
}

@media (min-width:1180px){
  .page-about .about-rail__card{
    flex-basis:340px;
  }
  .page-about .about-manifesto__grid{
    gap:var(--s7);
  }
}
<<<END>>>