.page-about{
  --about-line: rgba(247,241,227,.14);
  --about-gap: clamp(28px, 6vw, 72px);
  background: var(--ink);
  color: var(--fg);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: clamp(40px, 8vw, 96px);
}
.page-about .about-shell{
  width: min(1180px, 100% - 36px);
  margin-inline: auto;
}
.page-about .crumbs{
  padding: clamp(18px, 3vw, 28px) 0 0;
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--fg-dim);
}
.page-about .crumbs a{ color: var(--fg-dim); text-decoration: none; }
.page-about .crumbs a:hover{ color: var(--gold); }
.page-about .crumbs__sep{ margin: 0 .55em; color: var(--gold); }
.page-about .crumbs__current{ color: var(--bone); }

/* ---------- hero ---------- */
.page-about .about-hero{
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(32px, 6vw, 60px);
  border-bottom: 1px solid var(--gold);
}
.page-about .about-hero__grid{
  display: grid;
  gap: clamp(26px, 5vw, 48px);
}
.page-about .about-hero__kicker{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-about .about-hero h1{
  margin: .38em 0 .5em;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.3rem, 8.4vw, 4.5rem);
  line-height: 1.03;
  letter-spacing: -.01em;
  color: var(--bone);
}
.page-about .about-hero__lede{
  margin: 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.95;
  color: var(--fg-dim);
}
.page-about .about-stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 36px);
  background: var(--about-line);
}
.page-about .about-stats__item{
  background: var(--ink);
  padding: 14px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-stats__num{
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--gold);
  line-height: 1;
}
.page-about .about-stats__label{
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--fg-dim);
}

.page-about .about-hero__figure{
  position: relative;
  padding: 0;
}
.page-about .about-hero__figure::before{
  content: "";
  position: absolute;
  inset: 10px -6px -10px 10px;
  background: var(--gold);
  clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
  opacity: .85;
}
.page-about .about-hero__figure .figure{
  position: relative;
  margin: 0;
}
.page-about .about-hero__rot{
  display: none;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--celadon-light);
}

/* ---------- figure ---------- */
.page-about .figure{
  margin: 0;
  background: var(--ink-2);
  border: 1px solid var(--edge);
  box-shadow: var(--shadow-hard);
}
.page-about .figure__frame{
  position: relative;
  overflow: hidden;
  background: var(--ink-3);
}
.page-about .figure__img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .figure__caption{
  padding: 10px 14px 12px;
  border-top: 1px solid var(--gold);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--fg-dim);
}

/* ---------- .page-about layout ---------- */
.page-about .about-body{
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-top: clamp(28px, 5vw, 56px);
}
.page-about .about-index{
  align-self: start;
}
.page-about .about-index__title{
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-about .about-index__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-index__list::-webkit-scrollbar{ display: none; }
.page-about .about-index__list li{ flex: 0 0 auto; }
.page-about .about-index__list a{
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--about-line);
  background: var(--ink-2);
  color: var(--fg-dim);
  text-decoration: none;
  font-size: .8rem;
  letter-spacing: .06em;
  transition: border-color .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.page-about .about-index__list a:hover{
  border-color: var(--gold);
  color: var(--bone);
  transform: translateY(-2px);
}
.page-about .about-index__no{
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--gold);
}

/* ---------- sections ---------- */
.page-about .about-sec{
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px solid var(--about-line);
  scroll-margin-top: 96px;
}
.page-about .about-sec:first-child{ border-top: 0; padding-top: 0; }
.page-about .about-sec__no{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--gold);
}
.page-about .about-sec__title{
  margin: 0 0 .6em;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.65rem, 4.4vw, 2.75rem);
  line-height: 1.16;
  color: var(--bone);
}
.page-about .about-sec__lede{
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.95;
  color: var(--fg-dim);
}
.page-about .about-sec__head{ margin-bottom: clamp(18px, 3vw, 28px); }
.page-about .about-etch{
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
  margin-top: 18px;
}
.page-about .about-p{
  margin: 0 0 1.1em;
  max-width: 38em;
  line-height: 1.95;
  color: var(--fg-dim);
}
.page-about .about-sec__cols{
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .about-note{
  margin: 16px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--celadon);
  background: rgba(110,156,139,.1);
  font-size: .88rem;
  line-height: 1.85;
  color: var(--celadon-light);
  max-width: 34em;
}
.page-about .about-figure-mid{ margin-bottom: clamp(20px, 3vw, 30px); }

/* ---------- benefit matrix ---------- */
.page-about .benefit-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-about .benefit{
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--gold);
  transition: transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}
.page-about .benefit:nth-child(3n+2){ border-left-width: 9px; border-left-color: var(--celadon); }
.page-about .benefit:nth-child(3n+3){ border-left-width: 6px; border-left-color: var(--orange); }
.page-about .benefit:hover,
.page-about .benefit:focus-within{
  transform: translateY(-3px);
  border-color: var(--gold);
  background: var(--ink-3);
}
.page-about .benefit__idx{
  margin: 0;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .18em;
  color: var(--gold);
}
.page-about .benefit__title{
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.14rem;
  color: var(--bone);
}
.page-about .benefit__body{
  margin: 0;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--fg-dim);
}
.page-about .benefit__note{
  margin: auto 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--about-line);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--celadon-light);
  transition: color .22s var(--ease);
}
.page-about .benefit:hover .benefit__note{ color: var(--gold); }

/* ---------- devices ---------- */
.page-about .device-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-about .device{
  padding: 20px 18px 22px;
  background: linear-gradient(160deg, var(--ink-2), var(--ink));
  border: 1px solid var(--about-line);
  box-shadow: 6px 6px 0 rgba(5,13,22,.5);
}
.page-about .device__title{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 1.12rem;
  color: var(--bone);
}
.page-about .device .ledger__row{
  display: grid;
  gap: 4px;
  padding: 11px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .device .ledger__row:first-child{ border-top: 0; }
.page-about .device .ledger__key{
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--gold);
}
.page-about .device .ledger__val{
  font-size: .92rem;
  line-height: 1.8;
  color: var(--fg-dim);
}
.page-about .device__hint{
  margin: 14px 0 0;
  font-size: .84rem;
  line-height: 1.8;
  color: var(--slate);
  color: rgba(247,241,227,.55);
}

/* ---------- duties ---------- */
.page-about .duties{ border-bottom: 1px solid var(--about-line); }
.page-about .duty{ border-top: 1px solid var(--about-line); }
.page-about .duty__sum{
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 1.05rem;
  color: var(--bone);
  transition: color .2s var(--ease);
}
.page-about .duty__sum::-webkit-details-marker{ display: none; }
.page-about .duty__sum::marker{ content: ""; }
.page-about .duty__sum:hover{ color: var(--gold); }
.page-about .duty__idx{
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--gold);
}
.page-about .duty__hint{
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--fg-dim);
}
.page-about .duty[open] .duty__sum{ color: var(--gold); }
.page-about .duty__body{
  margin: 0 0 18px;
  padding-left: 30px;
  max-width: 38em;
  font-size: .92rem;
  line-height: 1.9;
  color: var(--fg-dim);
  border-left: 2px solid rgba(214,178,94,.4);
}

/* ---------- reach ---------- */
.page-about .reach-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-about .reach-card{
  padding: 18px;
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--gold);
  background: var(--ink-2);
}
.page-about .reach-card__label{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-about .reach-card__value{
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.06rem;
  line-height: 1.6;
  color: var(--bone);
  word-break: break-word;
}
.page-about .reach-card__value a{ color: inherit; text-decoration: none; border-bottom: 1px solid var(--gold); }
.page-about .reach-card__value a:hover{ color: var(--gold); }
.page-about .reach-card__note{
  margin: 0;
  font-size: .86rem;
  line-height: 1.8;
  color: var(--fg-dim);
}

.page-about .about-foot-link{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(20px, 3vw, 30px) 0 0;
}

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

/* ---------- breakpoints ---------- */
@media (min-width: 560px){
  .page-about .benefit-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .page-about .reach-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .page-about .reach-card--wide{ grid-column: 1 / -1; }
}

@media (min-width: 900px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: end;
  }
  .page-about .about-hero__rot{
    display: block;
    position: absolute;
    right: -28px;
    top: 8px;
    writing-mode: vertical-rl;
  }
  .page-about .about-stats{ grid-template-columns: repeat(4, minmax(0,1fr)); }
  .page-about .about-sec__cols{ grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr); }
  .page-about .device-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
  .page-about .duty__body{ padding-left: 42px; }
}

@media (min-width: 1024px){
  .page-about .about-body{
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }
  .page-about .about-index{
    position: sticky;
    top: 88px;
    padding-left: 2px;
    border-left: 1px solid var(--about-line);
  }
  .page-about .about-index__title{ padding-left: 12px; }
  .page-about .about-index__list{
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }
  .page-about .about-index__list a{
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    padding: 10px 10px 10px 12px;
    font-size: .86rem;
  }
  .page-about .about-index__list a:hover{
    border-left-color: var(--gold);
    background: var(--ink-2);
    transform: none;
  }
  .page-about .benefit-grid{ grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
  .page-about .about-sec__head{
    display: grid;
    grid-template-columns: minmax(0, 1fr) 200px;
    gap: 24px;
    align-items: start;
  }
  .page-about .about-etch{ margin-top: 6px; }

  .page-about .about-sec:nth-of-type(even) .about-sec__cols{
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.4fr);
  }
  .page-about .about-sec:nth-of-type(even) .about-sec__side{ order: -1; }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition: none !important;
    animation: none !important;
  }
  .page-about .benefit:hover,
  .page-about .about-index__list a:hover{ transform: none; }
}
<<<END>>>