.page-about{
  --about-gap: clamp(14px, 2.4vw, 24px);
  --about-pad: clamp(16px, 3vw, 28px);
  --about-radius: 16px;
  color: var(--paper);
}

.page-about .about-crumb{
  padding-top: clamp(14px, 2.4vw, 22px);
}
.page-about .about-crumb__item{
  display: inline;
}

/* ---------- hero ---------- */
.page-about .about-hero{
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(20px, 3vw, 34px);
}
.page-about .about-hero__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 40px);
  align-items: start;
}
.page-about .about-hero h1{
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 7.2vw, 54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--paper);
}
.page-about .about-hero h1 em{
  font-style: normal;
  color: var(--lime);
}
.page-about .about-hero__lead{
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 50ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-hero__stats{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 2vw, 20px);
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
}
.page-about .about-stat{
  border-left: 2px solid var(--lime);
  padding-left: 12px;
}
.page-about .about-stat--ice{
  border-left-color: var(--ice);
}
.page-about .about-stat--amber{
  border-left-color: var(--amber);
}
.page-about .about-stat__label{
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist);
  margin: 0;
}
.page-about .about-stat__num{
  margin: 6px 0 0;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}
.page-about .about-stat--ice .about-stat__num{
  color: var(--ice);
}
.page-about .about-stat--amber .about-stat__num{
  color: var(--amber);
}
.page-about .about-stat__unit{
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--mist);
}
.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}
.page-about .about-hero__figure{
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: var(--shadow-2);
}
.page-about .about-hero__figure::after{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 80% 0%, rgba(139,240,90,.16), transparent 60%),
    linear-gradient(180deg, rgba(7,31,24,0) 40%, rgba(7,31,24,.75) 100%);
}
.page-about .about-hero__figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media-frame__caption{
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--mist);
  border-top: 1px solid var(--line);
  background: rgba(7,31,24,.72);
}

/* ---------- section head ---------- */
.page-about .about-head{
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 30px);
}
.page-about .about-head__note{
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- origin / rail ---------- */
.page-about .about-rail-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}
.page-about .about-rail{
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin: 0;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-rail__item{
  flex: 0 0 auto;
  margin: 0;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  white-space: nowrap;
}
.page-about .about-rail__item b{
  color: var(--lime);
  font-weight: 600;
  margin-right: 4px;
}
.page-about .about-rail__panels{
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-panel{
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: var(--about-pad);
  background: linear-gradient(158deg, rgba(18,58,44,.78), rgba(12,42,32,.94));
  box-shadow: var(--shadow-2);
  transition: border-color .2s ease, transform .2s ease;
}
.page-about .about-panel--raised{
  border-color: var(--line-strong);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(139,240,90,.14), transparent 58%),
    linear-gradient(158deg, rgba(18,58,44,.9), rgba(12,42,32,.96));
}
.page-about .about-panel:hover{
  border-color: rgba(139,240,90,.45);
  transform: translateY(-2px);
}
.page-about .panel__head{
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.page-about .panel__num{
  font-size: 12px;
  color: var(--lime);
  letter-spacing: .1em;
}
.page-about .panel__title{
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.4;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-panel p{
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-flow{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  border-top: 1px dashed var(--line-strong);
  padding-top: clamp(14px, 2.4vw, 20px);
}
.page-about .about-flow__step{
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(12,42,32,.6);
}
.page-about .about-flow__step--end{
  border-color: rgba(139,240,90,.5);
  background: rgba(139,240,90,.08);
}
.page-about .about-flow__num{
  font-size: 11px;
  color: var(--lime);
  letter-spacing: .1em;
}
.page-about .about-flow__label{
  font-size: 13px;
  color: var(--paper);
}

/* ---------- method ---------- */
.page-about .about-method__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}
.page-about .about-fields{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-field{
  border: 1px solid var(--line);
  border-top: 2px solid var(--lime);
  border-radius: 12px;
  padding: 12px 13px;
  background: rgba(12,42,32,.55);
}
.page-about .about-field--ice{
  border-top-color: var(--ice);
}
.page-about .about-field--amber{
  border-top-color: var(--amber);
}
.page-about .about-field__num{
  display: block;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
}
.page-about .about-field__name{
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-field p{
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-method__figure{
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: var(--shadow-2);
}
.page-about .about-method__figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-versions{
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-versions__step{
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(14px, 2.4vw, 20px);
  background: linear-gradient(180deg, rgba(18,58,44,.6), rgba(12,42,32,.85));
}
.page-about .about-versions__tag{
  display: inline-block;
}
.page-about .about-versions__step h3{
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--paper);
  font-weight: 600;
}
.page-about .about-versions__step p{
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- readers ---------- */
.page-about .about-readers__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}
.page-about .about-reader{
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: var(--about-pad);
  background: rgba(12,42,32,.7);
  transition: border-color .2s ease, background-color .2s ease;
}
.page-about .about-reader:hover{
  border-color: rgba(139,240,90,.4);
}
.page-about .about-reader__num{
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ice);
}
.page-about .about-reader__role{
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-reader__take{
  margin: 10px 0 0;
  padding: 8px 10px;
  border-left: 2px solid var(--lime);
  background: rgba(139,240,90,.07);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--lime-soft);
}
.page-about .about-reader p:last-child{
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- team ---------- */
.page-about .about-team__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.page-about .about-team__card{
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(12,42,32,.7);
  overflow: hidden;
}
.page-about .about-team__summary{
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-team__summary::-webkit-details-marker{
  display: none;
}
.page-about .about-team__summary::marker{
  content: "";
}
.page-about .about-team__num{
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
}
.page-about .about-team__count{
  font-size: clamp(20px, 3.4vw, 26px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}
.page-about .about-team__role{
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-team__card p{
  margin: 0;
  padding: 0 16px 14px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
.page-about .about-team__card[open]{
  border-color: var(--line-strong);
}
.page-about .about-team__figure{
  margin: clamp(16px, 3vw, 26px) 0 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: var(--shadow-2);
}
.page-about .about-team__figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- network ---------- */
.page-about .about-network__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}
.page-about .about-network__item{
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: clamp(16px, 2.6vw, 24px);
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(139,240,90,.12), transparent 62%),
    rgba(12,42,32,.72);
}
.page-about .about-network__item--ice{
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(143,182,201,.16), transparent 62%),
    rgba(12,42,32,.72);
}
.page-about .about-network__item--amber{
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(242,178,76,.18), transparent 62%),
    rgba(12,42,32,.72);
}
.page-about .about-network__num{
  display: block;
  font-size: clamp(32px, 7vw, 48px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}
.page-about .about-network__item--ice .about-network__num{
  color: var(--ice);
}
.page-about .about-network__item--amber .about-network__num{
  color: var(--amber);
}
.page-about .about-network__label{
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-network__note{
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-network__band{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: center;
  margin-top: clamp(16px, 3vw, 26px);
  padding: clamp(16px, 2.8vw, 26px);
  border: 1px dashed var(--line-strong);
  border-radius: var(--about-radius);
  background: rgba(18,58,44,.5);
}
.page-about .about-network__band p{
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper);
}

/* ---------- cadence ---------- */
.page-about .about-cadence__list{
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line-strong);
  display: grid;
  gap: 12px;
}
.page-about .about-cadence__node{
  position: relative;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  background: rgba(12,42,32,.66);
  transition: border-color .2s ease, background-color .2s ease;
}
.page-about .about-cadence__node:hover,
.page-about .about-cadence__node:focus-within{
  border-color: rgba(139,240,90,.45);
  background: rgba(18,58,44,.78);
}
.page-about .about-cadence__dot{
  position: absolute;
  left: -28px;
  top: 20px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--mist);
}
.page-about .about-cadence__dot--lime{
  background: var(--lime);
  border-color: var(--lime);
}
.page-about .about-cadence__dot--amber{
  background: var(--amber);
  border-color: var(--amber);
}
.page-about .about-cadence__time{
  display: block;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--lime-soft);
}
.page-about .about-cadence__title{
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(16px, 2.1vw, 19px);
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-cadence__extra{
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- cta ---------- */
.page-about .about-cta__panel{
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: clamp(16px, 2.4vw, 22px);
  padding: clamp(20px, 4vw, 38px);
  background:
    radial-gradient(110% 130% at 92% 0%, rgba(242,178,76,.22), transparent 58%),
    radial-gradient(120% 120% at 0% 100%, rgba(139,240,90,.16), transparent 62%),
    linear-gradient(150deg, rgba(18,58,44,.95), rgba(7,31,24,.98));
  box-shadow: var(--shadow-2);
}
.page-about .about-cta__copy h2{
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-about .about-cta__copy p:last-child{
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-cta__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- responsive ---------- */
@media (min-width: 640px){
  .page-about .about-versions{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-readers__grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team__grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-network__grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-head{
    grid-template-columns: auto 1fr;
    align-items: baseline;
    column-gap: 14px;
  }
  .page-about .about-head__note{
    grid-column: 1 / -1;
    padding-left: 0;
  }
}

@media (min-width: 900px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 5.6fr);
    gap: clamp(26px, 3.6vw, 46px);
  }
  .page-about .about-rail-grid{
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(22px, 3.4vw, 40px);
    align-items: start;
  }
  .page-about .about-rail{
    position: sticky;
    top: calc(var(--header-h) + 22px);
    flex-direction: column;
    align-items: flex-start;
    overflow: visible;
    gap: 12px;
    padding: 0 0 0 16px;
    border-left: 1px solid var(--line-strong);
  }
  .page-about .about-rail__item{
    border: 0;
    border-radius: 0;
    padding: 0;
    font-size: 13px;
  }
  .page-about .about-method__grid{
    grid-template-columns: minmax(0, 6.6fr) minmax(0, 5.4fr);
    gap: clamp(22px, 3vw, 36px);
  }
  .page-about .about-fields{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__grid{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-network__band{
    grid-template-columns: 1fr auto;
    gap: 26px;
  }
  .page-about .about-cta__panel{
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 32px;
  }
  .page-about .about-cadence__list{
    padding-left: 28px;
    gap: 14px;
  }
  .page-about .about-cadence__dot{
    left: -34px;
  }
}

@media (hover: hover) and (pointer: fine){
  .page-about .about-cadence__extra{
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height .22s ease, opacity .22s ease, margin-top .22s ease;
  }
  .page-about .about-cadence__node:hover .about-cadence__extra,
  .page-about .about-cadence__node:focus-within .about-cadence__extra{
    max-height: 140px;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-panel,
  .page-about .about-reader,
  .page-about .about-cadence__node,
  .page-about .about-cadence__extra{
    transition: none;
  }
  .page-about .about-panel:hover{
    transform: none;
  }
}
<<<END>>>