.page-about{
  --about-ink-soft: rgba(22,30,46,.62);
  --about-blue-soft: rgba(10,92,255,.1);
  --about-orange-soft: rgba(255,90,31,.12);
  --about-line-width: 2px;
  display:block;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-base);
  scroll-behavior: smooth;
}
.page-about a{
  color: inherit;
  text-decoration: none;
}
.page-about a:focus-visible,
.page-about [tabindex]:focus-visible{
  outline: 2px solid var(--gold);
  outline-offset: 2px;
  border-radius: 6px;
}
.page-about img{
  display:block;
  max-width:100%;
  height:auto;
}

.about-hero{
  display:grid;
  gap:2.2rem;
  padding: 3rem var(--gutter) 0;
  max-width: var(--container);
  margin:0 auto;
}
.about-breadcrumb{
  display:flex;
  align-items:center;
  gap:.55rem;
  font-size:.85rem;
  color: var(--about-ink-soft);
  letter-spacing:.04em;
}
.about-breadcrumb a{
  color: var(--blue);
  border-bottom: 1px solid transparent;
  transition: border-color .15s ease;
}
.about-breadcrumb a:hover{
  border-color: currentColor;
}
.about-breadcrumb-sep{
  opacity:.5;
}
.about-kicker{
  margin:.5rem 0 0;
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color: var(--blue);
}
.about-hero h1{
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 5.6rem);
  font-weight:800;
  line-height:1.04;
  letter-spacing:-.01em;
  margin: .8rem 0 1rem;
}
.about-hero-lead{
  max-width: 44ch;
  font-size:1.05rem;
  line-height:1.75;
  color: var(--about-ink-soft);
}
.about-hero-visual{
  position:relative;
  min-height: 290px;
}
.about-hero-blue{
  position:absolute;
  inset: 8% 0 0 12%;
  background: linear-gradient(135deg, var(--blue) 0%, rgba(10,92,255,.55) 72%, rgba(10,92,255,.18) 100%);
  clip-path: polygon(0 8%, 78% 0, 100% 28%, 100% 100%, 4% 84%);
}
.about-hero-orange{
  position:absolute;
  right: 0;
  top: 16%;
  width: 42%;
  height: 44%;
  background: linear-gradient(160deg, rgba(255,90,31,.92), rgba(255,90,31,.2));
  clip-path: polygon(18% 0, 100% 0, 100% 76%, 0 100%);
}
.about-hero-card{
  position:absolute;
  left: 4%;
  bottom: 2%;
  z-index:2;
  max-width: 270px;
  padding: 1.2rem 1.4rem;
  background: var(--glass);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(22,30,46,.18);
  backdrop-filter: blur(8px);
}
.about-hero-card-kicker{
  display:block;
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color: var(--about-ink-soft);
}
.about-hero-card-value{
  display:block;
  font-family: var(--font-display);
  font-size: 3.4rem;
  line-height:1;
  font-weight:800;
  color: var(--ink);
}
.about-hero-card-note{
  display:block;
  margin-top:.5rem;
  font-size:.85rem;
  color: var(--about-ink-soft);
}

.about-layout{
  display:grid;
  gap: 2.5rem;
  max-width: var(--container);
  margin:0 auto;
  padding: 3.5rem var(--gutter) 0;
}
.about-toc{
  scroll-behavior: smooth;
}
.about-toc nav{
  display:flex;
  gap:.65rem;
  overflow-x:auto;
  padding-bottom:.4rem;
}
.about-toc a{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  flex:0 0 auto;
  padding:.4rem .85rem .4rem .4rem;
  border:1px solid var(--line);
  border-radius:999px;
  background: rgba(255,255,255,.55);
  font-size:.85rem;
  font-weight:600;
  color: var(--ink);
  transition: border-color .15s ease, background .15s ease, transform .15s ease;
}
.about-toc a span{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:1.7rem;
  height:1.7rem;
  border-radius:50%;
  background: var(--blue);
  color:#fff;
  font-family: var(--font-display);
  font-size:.8rem;
  font-weight:700;
}
.about-toc a:hover{
  border-color: var(--blue);
  background:#fff;
  transform: translateY(-1px);
}

.about-chapter{
  display:grid;
  gap:1.5rem;
  padding-top: 3rem;
  border-top: var(--about-line-width) solid var(--line);
  margin-top: 3rem;
}
.about-chapter:first-of-type{
  border-top:0;
  margin-top:0;
  padding-top:0;
}
.about-chapter-index{
  display:none;
}
.about-chapter-label{
  margin:0 0 .4rem;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color: var(--blue);
}
.about-chapter h2{
  margin:0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.3rem);
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.01em;
}
.about-chapter-intro{
  max-width: 56ch;
  margin:0 0 1.8rem;
  font-size:1.02rem;
  line-height:1.75;
  color: var(--about-ink-soft);
}

.about-brand-layout{
  display:grid;
  gap:1.6rem;
}
.about-brand-copy p{
  margin:0 0 1.1rem;
  max-width:62ch;
  line-height:1.8;
}
.about-brand-note{
  position:relative;
  overflow:hidden;
  padding: 1.5rem 1.4rem 1.4rem;
  border-radius: 2px 18px 2px 18px;
  background: linear-gradient(135deg, var(--blue) 0%, #13418f 100%);
  color:#fff;
}
.about-brand-note::after{
  content:"";
  position:absolute;
  right:-46px;
  top:-46px;
  width:130px;
  height:130px;
  border-radius:50%;
  background: rgba(255,255,255,.13);
}
.about-brand-note > span{
  display:block;
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color: rgba(255,255,255,.78);
}
.about-brand-note strong{
  display:block;
  margin-top:.5rem;
  font-family: var(--font-display);
  font-size: 2.4rem;
  line-height:1.15;
}
.about-brand-note p{
  margin:.7rem 0 0;
  font-size:.9rem;
  line-height:1.6;
  opacity:.85;
}

.about-timeline{
  margin-top: 2rem;
}
.about-timeline-scroll{
  display:flex;
  gap:.5rem;
  overflow-x:auto;
  padding: .6rem 0 1.2rem;
  scroll-behavior: smooth;
  scrollbar-width: thin;
}
.about-tl-node{
  position:relative;
  flex:0 0 3.4rem;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.45rem;
  padding-top: 2.4rem;
}
.about-tl-node::before{
  content:"";
  position:absolute;
  top:1.2rem;
  left:-.25rem;
  width:.25rem;
  height: var(--about-line-width);
  background: var(--line);
}
.about-tl-node:first-child::before{
  display:none;
}
.about-tl-dot{
  position:relative;
  width:.85rem;
  height:.85rem;
  border-radius:50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px var(--paper);
  transition: background .15s ease, transform .15s ease, box-shadow .15s ease;
}
.about-tl-node.is-initial .about-tl-dot,
.about-tl-node:hover .about-tl-dot,
.about-tl-node:focus-visible .about-tl-dot{
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(10,92,255,.16);
  transform: scale(1.2);
}
.about-tl-num{
  font-family: var(--font-display);
  font-size:.85rem;
  font-weight:700;
  color: var(--about-ink-soft);
}
.about-tl-pop{
  position:absolute;
  bottom:3.1rem;
  left:50%;
  z-index:3;
  width:9.2rem;
  transform: translate(-50%, 6px);
  padding:.5rem .55rem;
  border-radius:8px;
  background: var(--ink);
  color:#fff;
  text-align:center;
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transition: opacity .16s ease, transform .16s ease, visibility .16s ease;
}
.about-tl-pop::after{
  content:"";
  position:absolute;
  top:100%;
  left:50%;
  transform:translateX(-50%);
  border:6px solid transparent;
  border-top-color: var(--ink);
}
.about-tl-pop-num,
.about-tl-pop-stage{
  display:block;
}
.about-tl-pop-num{
  font-size:.78rem;
  font-weight:700;
}
.about-tl-pop-stage{
  margin-top:.12rem;
  font-size:.72rem;
  line-height:1.4;
  opacity:.82;
}
.about-tl-node.is-initial .about-tl-pop,
.about-tl-node:hover .about-tl-pop,
.about-tl-node:focus-visible .about-tl-pop{
  opacity:1;
  visibility:visible;
  transform: translate(-50%, 0);
}
.about-timeline-hint{
  display:flex;
  justify-content:space-between;
  gap:1rem;
  margin:.3rem 0 0;
  padding: .7rem 0 0;
  border-top: var(--about-line-width) solid var(--line);
  font-size:.78rem;
  letter-spacing:.06em;
  color: var(--about-ink-soft);
}

.about-history-media{
  display:grid;
  gap:1.2rem;
  margin-top:2.2rem;
  align-items:end;
}
.about-history-media img{
  width:100%;
  aspect-ratio: 4 / 3;
  object-fit:cover;
  border-radius: 12px;
}
.about-history-sidecard{
  padding: 1.1rem 1.3rem;
  border-left: 3px solid var(--blue);
  background: var(--about-blue-soft);
}
.about-history-sidecard-label{
  display:block;
  margin-bottom:.4rem;
  font-weight:700;
}
.about-history-sidecard p{
  margin:0;
  font-size:.9rem;
  line-height:1.65;
  color: var(--about-ink-soft);
}

.about-scale-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap:.9rem;
  margin: 2rem 0 0;
}
.about-scale-stat{
  position:relative;
  overflow:hidden;
  padding: 1.25rem 1rem 1.1rem;
  border-radius: 2px 14px 2px 14px;
  background: var(--ink);
  color:#fff;
}
.about-scale-stat::after{
  content:"";
  position:absolute;
  right:-28px;
  top:-28px;
  width:74px;
  height:74px;
  border-radius:50%;
  background: rgba(255,255,255,.08);
}
.about-scale-stat-num{
  display:block;
  font-family: var(--font-display);
  font-size: 2.6rem;
  line-height:1;
  font-weight:800;
}
.about-scale-stat-label{
  display:block;
  margin-top:.55rem;
  font-size:.84rem;
  line-height:1.4;
  opacity:.75;
}

.about-device{
  display:flex;
  flex-wrap:wrap;
  gap:.7rem;
  margin-top:2.2rem;
  padding: 1.2rem 1rem 1rem;
  border: var(--about-line-width) solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,.45);
}
.about-device-opt{
  display:inline-flex;
  align-items:center;
  padding:.42rem 1.1rem;
  border: var(--about-line-width) solid var(--line);
  border-radius:999px;
  background:#fff;
  font-size:.9rem;
  font-weight:600;
  cursor:pointer;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.about-device-opt:hover,
.about-device-opt:focus-visible{
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(10,92,255,.05);
}
.about-device-panels{
  flex-basis:100%;
  display:grid;
  gap:.8rem;
}
.about-device-panel{
  padding:.85rem 1rem .9rem;
  border-left: 3px solid var(--blue);
  background: rgba(245,241,232,.9);
  transition: opacity .2s ease, border-color .2s ease;
}
.about-device-panel h3{
  margin:.15rem 0 .35rem;
  font-size:1.05rem;
}
.about-device-panel p{
  margin:0;
  font-size:.9rem;
  line-height:1.65;
  color: var(--about-ink-soft);
}
.about-device-icon{
  font-family: var(--font-display);
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.1em;
  color: var(--blue);
}
.about-device-opt-pc:hover ~ .about-device-panels .about-device-panel-mb,
.about-device-opt-pc:focus-visible ~ .about-device-panels .about-device-panel-mb,
.about-device-opt-mb:hover ~ .about-device-panels .about-device-panel-pc,
.about-device-opt-mb:focus-visible ~ .about-device-panels .about-device-panel-pc{
  opacity:.42;
  border-left-color: var(--line);
}

.about-scale-cycle{
  display:grid;
  gap:1.4rem;
  margin-top:2.2rem;
  align-items:center;
}
.about-scale-cycle img{
  width:100%;
  aspect-ratio: 3 / 2;
  object-fit:cover;
  border-radius: 14px;
}
.about-scale-cycle-caption{
  padding: 1.25rem 1.3rem;
  border: var(--about-line-width) solid var(--line);
  border-radius: 14px;
  background: var(--glass);
}
.about-scale-cycle-caption h3{
  margin:0 0 .5rem;
  font-size:1.2rem;
}
.about-scale-cycle-caption p{
  margin:0;
  font-size:.92rem;
  line-height:1.7;
  color: var(--about-ink-soft);
}

.about-category-list{
  display:grid;
  gap:.85rem;
  margin-top:2rem;
}
.about-category-item{
  display:grid;
  grid-template-columns: 2.6rem 1fr;
  gap:.35rem .9rem;
  align-items:center;
  padding: 1rem 1.1rem;
  border: var(--about-line-width) solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,.55);
  transition: transform .13s ease, border-color .13s ease, box-shadow .13s ease, background .13s ease;
}
a.about-category-item:hover{
  transform: translateX(6px);
  border-color: var(--blue);
  box-shadow: 0 10px 24px rgba(22,30,46,.08);
  background:#fff;
}
a.about-category-item:focus-visible{
  border-color: var(--gold);
}
.about-category-num{
  grid-row: span 2;
  font-family: var(--font-display);
  font-size:1.5rem;
  font-weight:800;
  color: var(--blue);
}
.about-category-title{
  align-self:end;
  font-weight:700;
  font-size:1.05rem;
}
.about-category-desc{
  align-self:start;
  font-size:.86rem;
  line-height:1.55;
  color: var(--about-ink-soft);
}
.about-category-item-static{
  cursor:default;
}

.about-category-extra{
  margin-top:1.6rem;
}
.about-category-extra img{
  width:100%;
  aspect-ratio: 10 / 7;
  object-fit:cover;
  border-radius: 14px;
}

.about-path-note{
  display:grid;
  gap:1rem;
  margin-top:2rem;
  padding: 1.6rem 1.4rem 1.5rem;
  border-radius: 14px;
  background: var(--night);
  color:#fff;
}
.about-path-note-step span{
  display:block;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  opacity:.65;
}
.about-path-note-step strong{
  display:block;
  margin:.25rem 0 .35rem;
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height:1;
}
.about-path-note-step p{
  margin:0;
  font-size:.88rem;
  opacity:.82;
}
.about-path-arrow{
  align-self:center;
  justify-self:start;
  font-family: var(--font-display);
  font-size:2.4rem;
  font-weight:800;
  line-height:1;
  color: var(--orange);
}

.about-next{
  max-width: var(--container);
  margin:0 auto;
  padding: 4rem var(--gutter) 5rem;
}
.about-next-kicker{
  margin:0 0 1rem;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color: var(--blue);
}
.about-next-links{
  display:flex;
  flex-wrap:wrap;
  gap:.85rem;
}
.about-next-link{
  padding:.7rem 1.4rem;
  border: var(--about-line-width) solid var(--blue);
  border-radius:999px;
  font-size:.95rem;
  font-weight:600;
  color: var(--blue);
  transition: background .15s ease, color .15s ease, box-shadow .15s ease;
}
.about-next-link:hover{
  background: var(--blue);
  color:#fff;
  box-shadow: 0 8px 20px rgba(10,92,255,.25);
}
.about-next-link-solid{
  background: var(--blue);
  color:#fff;
}
.about-next-link-solid:hover{
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 8px 20px rgba(255,90,31,.25);
}

@media (min-width: 720px){
  .about-hero{
    grid-template-columns: 1.05fr .95fr;
    align-items:center;
    gap:2rem;
    padding-top: 4.5rem;
  }
  .about-scale-grid{
    grid-template-columns: repeat(4,1fr);
  }
  .about-scale-cycle{
    grid-template-columns: 1.25fr .75fr;
  }
  .about-device-panels{
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px){
  .about-layout{
    grid-template-columns: 190px minmax(0,1fr);
    gap: clamp(2.5rem, 6vw, 5rem);
    padding-top: 5rem;
  }
  .about-toc{
    position: sticky;
    top: 130px;
    align-self:start;
  }
  .about-toc nav{
    display:grid;
    gap:.55rem;
    overflow:visible;
  }
  .about-toc a{
    border-color: transparent;
    border-radius: 10px;
    background: transparent;
    padding:.6rem .8rem;
  }
  .about-toc a span{
    width: 1.9rem;
    height:1.9rem;
  }
  .about-toc a:hover{
    background: rgba(255,255,255,.6);
    border-color: var(--line);
  }
  .about-chapter{
    grid-template-columns: 120px minmax(0,1fr);
    gap:1.8rem;
    padding-top: 4.5rem;
    margin-top: 4.5rem;
  }
  .about-chapter-index{
    display:block;
    font-family: var(--font-display);
    font-size: clamp(4.5rem, 7vw, 7rem);
    font-weight:800;
    line-height:.9;
    color: transparent;
    -webkit-text-stroke: 1px var(--line);
  }
  .about-brand-layout{
    grid-template-columns: 1.4fr .75fr;
  }
  .about-history-media{
    grid-template-columns: 1.15fr .85fr;
  }
  .about-category-list{
    grid-template-columns: repeat(2, 1fr);
  }
  .about-path-note{
    grid-template-columns: 1fr auto 1fr;
    align-items:center;
    padding: 2rem 2.2rem;
  }
  .about-path-arrow{
    justify-self:center;
  }
  .about-next{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:2rem;
    padding-top: 5rem;
  }
  .about-next-kicker{
    margin:0;
  }
  .about-next-links{
    justify-content:flex-end;
  }
}