.page-about{
  --ab-radius:22px;
  --ab-radius-sm:14px;
  --ab-line:#D3E2F5;
  --ab-muted:#64748B;
}
.page-about img{
  max-width:100%;
  height:auto;
}
.page-about .ab-hero{
  position:relative;
  background:
    linear-gradient(120deg, rgba(0,194,168,.14) 0%, transparent 30%),
    linear-gradient(45deg, transparent 72%, rgba(246,185,59,.10) 72%),
    var(--qsu-primary);
  color:#fff;
  padding:3.5rem 1rem 2.75rem;
  overflow:hidden;
}
.page-about .ab-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(115deg, rgba(255,255,255,.035) 0 2px, transparent 2px 26px);
  pointer-events:none;
}
.page-about .ab-hero__inner{
  position:relative;
  z-index:1;
}
.page-about .ab-crumb{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
  font-family:var(--qsu-font-data);
  font-size:.76rem;
  color:rgba(244,247,252,.65);
  margin-bottom:2.6rem;
  padding:0;
  list-style:none;
}
.page-about .ab-crumb a{
  color:rgba(244,247,252,.65);
  text-decoration:none;
  transition:color .2s ease;
}
.page-about .ab-crumb a:hover{
  color:#fff;
}
.page-about .ab-crumb [aria-current="page"]{
  color:var(--qsu-accent);
}
.page-about .ab-hero__split{
  display:grid;
  grid-template-columns:1fr;
  gap:2rem;
}
.page-about .ab-hero__copy{
  position:relative;
  z-index:2;
  max-width:54rem;
}
.page-about .ab-hero h1{
  font-family:var(--qsu-font-head);
  font-size:clamp(2.55rem,5.2vw,4.5rem);
  line-height:1.05;
  letter-spacing:.01em;
  margin:.4rem 0 1.4rem;
}
.page-about .ab-hero__lead{
  max-width:60ch;
  color:rgba(244,247,252,.82);
  font-size:1.02rem;
  line-height:1.85;
  margin:0 0 1.8rem;
}
.page-about .ab-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:.8rem;
  align-items:center;
}
.page-about .ab-hero .qsu-btn--ghost{
  border-color:rgba(244,247,252,.55);
  color:#fff;
}
.page-about .ab-hero .qsu-btn--ghost:hover{
  border-color:#fff;
  background:rgba(255,255,255,.12);
}
.page-about .ab-hero__rotate{
  display:none;
}
@media (min-width: 1020px){
  .page-about .ab-hero{
    padding:4.5rem 0 3rem;
  }
  .page-about .ab-hero__split{
    grid-template-columns:1fr auto;
    align-items:start;
  }
  .page-about .ab-hero__rotate{
    display:block;
    writing-mode:vertical-rl;
    font-family:var(--qsu-font-data);
    font-size:.68rem;
    letter-spacing:.30em;
    color:rgba(244,247,252,.55);
    text-transform:uppercase;
    padding-top:1.4rem;
    position:relative;
  }
}
.page-about .ab-hero__stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1px;
  background:rgba(244,247,252,.14);
  border:1px solid rgba(244,247,252,.14);
  border-radius:var(--ab-radius);
  margin:3rem 0 0;
  padding:0;
  overflow:hidden;
}
@media (min-width: 700px){
  .page-about .ab-hero__stats{
    grid-template-columns:repeat(4,1fr);
  }
}
.page-about .ab-stat{
  background:var(--qsu-primary);
  padding:1.15rem 1rem 1.35rem;
  min-width:0;
}
.page-about .ab-stat dt{
  font-size:.76rem;
  color:rgba(244,247,252,.6);
  margin-bottom:.45rem;
}
.page-about .ab-stat dd{
  margin:0;
  font-family:var(--qsu-font-data);
  font-size:clamp(1.45rem,2.5vw,1.9rem);
  line-height:1;
  color:var(--qsu-accent);
}
.page-about .ab-split{
  display:grid;
  grid-template-columns:1fr;
}
@media (min-width: 1000px){
  .page-about .ab-split{
    grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  }
}
.page-about .ab-split__left{
  background:
    linear-gradient(160deg, rgba(0,194,168,.10) 0%, transparent 32%),
    var(--qsu-ink);
  color:rgba(244,247,252,.82);
  padding:3rem 1.25rem;
}
@media (min-width: 1000px){
  .page-about .ab-split__left{
    padding:4.75rem 2.5rem 4rem;
  }
}
.page-about .ab-split__right{
  background:var(--qsu-paper);
  padding:3rem 1.25rem;
  min-width:0;
}
@media (min-width: 1000px){
  .page-about .ab-split__right{
    padding:4.75rem 3rem 4rem;
  }
}
.page-about .ab-split__num{
  display:block;
  font-family:var(--qsu-font-data);
  font-size:.82rem;
  letter-spacing:.22em;
  color:var(--qsu-gold);
  margin:0 0 .8rem;
}
.page-about .ab-split__num--right{
  text-align:right;
}
.page-about .ab-split__left h2,
.page-about .ab-manual h2,
.page-about .ab-boundary h2{
  font-family:var(--qsu-font-head);
  font-size:clamp(1.7rem,2.6vw,2.5rem);
  line-height:1.15;
  margin:0 0 1.3rem;
}
.page-about .ab-split__left h2{
  color:#fff;
}
.page-about .ab-manual h2,
.page-about .ab-boundary h2{
  color:var(--qsu-ink);
}
.page-about .ab-source p{
  line-height:1.85;
  margin:0 0 1rem;
  color:rgba(244,247,252,.82);
}
.page-about .ab-source__figure{
  margin:2.1rem 0 2.6rem;
}
.page-about .ab-source__img{
  display:block;
  width:100%;
  border-radius:var(--ab-radius);
}
.page-about .ab-source__figure figcaption{
  margin-top:.6rem;
  font-family:var(--qsu-font-data);
  font-size:.75rem;
  color:rgba(244,247,252,.55);
}
.page-about .ab-timeline{
  padding-left:1.1rem;
  border-left:2px solid rgba(0,194,168,.35);
}
.page-about .ab-timeline h2{
  font-family:var(--qsu-font-head);
  font-size:clamp(1.7rem,2.6vw,2.5rem);
  color:#fff;
  margin:0 0 1.5rem;
}
.page-about .ab-timeline__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:1.7rem;
}
.page-about .ab-timeline__item{
  position:relative;
  padding-left:1.25rem;
}
.page-about .ab-timeline__item::before{
  content:"";
  position:absolute;
  left:-1.48rem;
  top:.42rem;
  width:.6rem;
  height:.6rem;
  border-radius:50%;
  background:var(--qsu-accent);
  border:2px solid var(--qsu-ink);
  box-shadow:0 0 0 2px var(--qsu-accent);
}
.page-about .ab-timeline__year{
  display:block;
  font-family:var(--qsu-font-data);
  color:var(--qsu-gold);
  font-size:.86rem;
  margin-bottom:.3rem;
}
.page-about .ab-timeline__title{
  margin:0 0 .3rem;
  font-weight:700;
  color:#fff;
}
.page-about .ab-timeline__text{
  margin:0;
  font-size:.92rem;
  line-height:1.7;
  color:rgba(244,247,252,.66);
}
.page-about .ab-manual{
  position:relative;
  border-bottom:1px solid var(--qsu-line);
  padding-bottom:2.6rem;
}
.page-about .ab-manual__stamp{
  display:none;
}
@media (min-width: 1280px){
  .page-about .ab-manual__stamp{
    display:block;
    position:absolute;
    right:-.5rem;
    top:2.4rem;
    writing-mode:vertical-rl;
    font-family:var(--qsu-font-data);
    font-size:.68rem;
    letter-spacing:.24em;
    color:var(--qsu-accent);
    border:1px solid rgba(0,194,168,.6);
    border-radius:8px;
    padding:.6rem .35rem;
  }
}
.page-about .ab-principle{
  background:#fff;
  border:1px solid var(--qsu-line);
  border-radius:var(--ab-radius-sm);
  padding:1.3rem 1.4rem;
  margin-bottom:1rem;
  position:relative;
  transition:border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.page-about .ab-principle:hover{
  border-color:var(--qsu-accent);
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(10,31,68,.06);
}
.page-about .ab-principle__code{
  display:block;
  font-family:var(--qsu-font-data);
  font-size:.72rem;
  letter-spacing:.12em;
  color:var(--qsu-gold);
  margin-bottom:.4rem;
}
.page-about .ab-principle h3{
  font-size:1.12rem;
  margin:0 0 .5rem;
  color:var(--qsu-ink);
}
.page-about .ab-principle p{
  margin:0;
  font-size:.93rem;
  line-height:1.8;
  color:var(--qsu-muted);
}
.page-about .ab-boundary{
  margin-top:2.6rem;
}
.page-about .ab-boundary__intro{
  color:var(--qsu-muted);
  line-height:1.8;
  margin:0 0 1.2rem;
}
.page-about .ab-boundary__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:.9rem;
}
.page-about .ab-boundary__list li{
  background:#fff;
  border:1px solid var(--qsu-line);
  border-radius:var(--ab-radius-sm);
  padding:1rem 1.2rem;
  display:grid;
  grid-template-columns:1fr;
  gap:.35rem;
  align-items:baseline;
  transition:border-color .2s ease;
}
.page-about .ab-boundary__list li:hover{
  border-color:var(--qsu-cobalt);
}
.page-about .ab-boundary__list b{
  font-family:var(--qsu-font-data);
  font-size:.8rem;
  color:var(--qsu-cobalt);
}
.page-about .ab-boundary__list span{
  font-size:.92rem;
  color:var(--qsu-muted);
  line-height:1.75;
}
@media (min-width: 560px){
  .page-about .ab-boundary__list li{
    grid-template-columns:6.5rem 1fr;
    gap:.8rem;
  }
}
.page-about .ab-boundary__note{
  display:flex;
  gap:.8rem;
  background:rgba(246,185,59,.12);
  border-left:4px solid var(--qsu-gold);
  border-radius:var(--ab-radius-sm);
  padding:1rem 1.2rem;
  margin-top:1.2rem;
}
.page-about .ab-boundary__note-lines{
  font-family:var(--qsu-font-data);
  color:var(--qsu-gold);
  font-weight:700;
}
.page-about .ab-boundary__note p{
  margin:0;
  font-size:.88rem;
  line-height:1.7;
  color:var(--qsu-ink);
}
.page-about .ab-scenarios{
  background:var(--qsu-paper);
  padding:4.25rem 0;
}
.page-about .ab-section-head{
  margin-bottom:2.25rem;
  max-width:72ch;
}
.page-about .ab-section-head h2{
  font-family:var(--qsu-font-head);
  font-size:clamp(1.9rem,3vw,2.9rem);
  line-height:1.1;
  margin:.4rem 0 .6rem;
  color:var(--qsu-ink);
}
.page-about .ab-section-head p:last-child{
  color:var(--qsu-muted);
  line-height:1.8;
  margin:0;
}
.page-about .ab-scenario-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:1rem;
  margin-bottom:2.6rem;
}
@media (min-width: 640px){
  .page-about .ab-scenario-grid{
    grid-template-columns:repeat(2,1fr);
  }
}
@media (min-width: 1100px){
  .page-about .ab-scenario-grid{
    grid-template-columns:repeat(4,1fr);
  }
}
.page-about .ab-scenario{
  background:#fff;
  border:1px solid var(--qsu-line);
  border-radius:var(--ab-radius);
  padding:1.4rem 1.5rem 1.6rem;
  position:relative;
  overflow:hidden;
  transition:box-shadow .2s ease;
}
.page-about .ab-scenario:hover{
  box-shadow:0 12px 28px rgba(10,31,68,.08);
}
.page-about .ab-scenario::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:linear-gradient(90deg, var(--qsu-accent), var(--qsu-gold));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s ease;
}
.page-about .ab-scenario:hover::before{
  transform:scaleX(1);
}
.page-about .ab-scenario__no{
  display:inline-block;
  font-family:var(--qsu-font-data);
  color:var(--qsu-gold);
  font-size:.85rem;
  margin-bottom:.9rem;
}
.page-about .ab-scenario h3{
  margin:0 0 .55rem;
  color:var(--qsu-ink);
  font-size:1.02rem;
}
.page-about .ab-scenario p{
  margin:0;
  color:var(--qsu-muted);
  font-size:.9rem;
  line-height:1.75;
}
.page-about .ab-scenarios__map{
  background:var(--qsu-ink);
  border-radius:var(--ab-radius);
  display:grid;
  grid-template-columns:1fr;
  overflow:hidden;
}
@media (min-width: 900px){
  .page-about .ab-scenarios__map{
    grid-template-columns:1.25fr 1fr;
  }
}
.page-about .ab-scenarios__fig{
  margin:0;
  min-height:0;
}
.page-about .ab-scenarios__fig img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:16/10;
}
.page-about .ab-scenarios__mapcopy{
  padding:1.8rem 1.6rem;
  background:
    linear-gradient(130deg, rgba(0,194,168,.14) 0%, transparent 46%),
    var(--qsu-ink);
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:flex-start;
}
.page-about .ab-scenarios__mapcopy h3{
  color:#fff;
  font-family:var(--qsu-font-head);
  font-size:clamp(1.3rem,2vw,1.85rem);
  line-height:1.25;
  margin:0 0 .9rem;
}
.page-about .ab-scenarios__mapcopy p{
  color:rgba(244,247,252,.7);
  line-height:1.8;
  font-size:.95rem;
  margin:0 0 1.4rem;
}
.page-about .ab-scenarios__tags{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  margin-bottom:1.5rem;
}
.page-about .ab-scenarios__tags span{
  font-family:var(--qsu-font-data);
  font-size:.72rem;
  color:var(--qsu-accent);
  border:1px solid rgba(0,194,168,.45);
  border-radius:999px;
  padding:.32rem .7rem;
  background:rgba(0,194,168,.08);
}
.page-about .ab-qa{
  background:var(--qsu-primary);
  color:rgba(244,247,252,.85);
  padding:4.25rem 0;
  position:relative;
  overflow:hidden;
}
.page-about .ab-qa::before{
  content:"";
  position:absolute;
  bottom:-40px;
  right:8%;
  width:200px;
  height:200px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(0,194,168,.16) 0%, transparent 70%);
  pointer-events:none;
}
.page-about .ab-qa__inner{
  position:relative;
  z-index:1;
}
.page-about .ab-section-head--light{
  margin-bottom:2rem;
}
.page-about .ab-section-head--light h2{
  color:#fff;
}
.page-about .ab-section-head--light p:last-child{
  color:rgba(244,247,252,.62);
}
.page-about .ab-qa__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:2rem;
  margin-top:2rem;
}
@media (min-width: 900px){
  .page-about .ab-qa__grid{
    grid-template-columns:1.5fr 1fr;
    gap:3rem;
  }
}
.page-about .ab-qa__list{
  display:grid;
  gap:.85rem;
  align-content:start;
}
.page-about .ab-qa__item{
  background:rgba(244,247,252,.05);
  border:1px solid rgba(244,247,252,.12);
  border-radius:var(--ab-radius-sm);
  padding:.9rem 1.1rem;
  transition:border-color .2s ease, background .2s ease;
}
.page-about .ab-qa__item:hover{
  border-color:rgba(0,194,168,.6);
}
.page-about .ab-qa__item[open]{
  border-color:rgba(0,194,168,.75);
}
.page-about .ab-qa__item summary{
  cursor:pointer;
  font-weight:700;
  color:#fff;
  list-style:none;
  position:relative;
  padding-right:1.7rem;
}
.page-about .ab-qa__item summary::-webkit-details-marker{
  display:none;
}
.page-about .ab-qa__item summary::after{
  content:"+";
  position:absolute;
  right:0;
  top:.1rem;
  font-family:var(--qsu-font-data);
  color:var(--qsu-gold);
  font-size:1.25rem;
  line-height:1;
  transition:transform .2s ease;
}
.page-about .ab-qa__item[open] summary::after{
  transform:rotate(45deg);
}
.page-about .ab-qa__item p{
  margin:.8rem 0 0;
  color:rgba(244,247,252,.7);
  line-height:1.8;
  font-size:.93rem;
  padding-top:.55rem;
  border-top:1px solid rgba(244,247,252,.08);
}
.page-about .ab-qa__aside{
  display:grid;
  gap:1rem;
  align-content:start;
}
.page-about .ab-qa__aside figure{
  margin:0;
}
.page-about .ab-qa__aside img{
  display:block;
  width:100%;
  border-radius:var(--ab-radius);
  object-fit:cover;
  max-height:430px;
}
.page-about .ab-qa__aside p{
  margin:.5rem 0 0;
  color:rgba(244,247,252,.6);
  font-size:.88rem;
  line-height:1.7;
}
.page-about .ab-closing{
  background:
    linear-gradient(120deg, rgba(0,194,168,.14) 0%, transparent 36%),
    var(--qsu-ink);
  color:#fff;
  padding:4.25rem 0;
  text-align:center;
}
.page-about .ab-closing__inner{
  max-width:760px;
  margin-left:auto;
  margin-right:auto;
}
.page-about .ab-closing h2{
  font-family:var(--qsu-font-head);
  font-size:clamp(1.9rem,3.4vw,3rem);
  line-height:1.2;
  margin:0 0 1rem;
}
.page-about .ab-closing p{
  color:rgba(244,247,252,.72);
  line-height:1.8;
  margin:0 0 2rem;
}
.page-about .ab-closing__actions{
  display:flex;
  flex-wrap:wrap;
  gap:.8rem;
  justify-content:center;
}
.page-about .ab-closing .qsu-btn--ghost{
  border-color:rgba(244,247,252,.5);
  color:#fff;
}
.page-about .ab-closing .qsu-btn--ghost:hover{
  border-color:#fff;
  background:rgba(255,255,255,.12);
}
@media (prefers-reduced-motion: reduce){
  .page-about .ab-scenario,
  .page-about .ab-principle,
  .page-about .ab-source__figure,
  .page-about .ab-qa__item{
    transition:none;
  }
  .page-about .ab-hero::before,
  .page-about .ab-scenario::before{
    animation:none;
  }
}