.page-about {
  --about-rail: 232px;
  --about-glow: rgba(49, 232, 216, .10);
  color: var(--paper);
  font-family: var(--font-body);
  background:
    radial-gradient(130% 70% at 6% -12%, rgba(49, 232, 216, .12), transparent 56%),
    radial-gradient(110% 80% at 104% 4%, rgba(255, 94, 142, .08), transparent 58%),
    var(--ink-800);
}

.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 36px) 0 clamp(32px, 6vw, 64px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__eyebrow {
  margin: clamp(18px, 3vw, 30px) 0 14px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(2rem, 8.4vw, 4.6rem);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -.02em;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-hero__mark {
  color: var(--cyan);
  font-weight: 500;
}

.page-about .about-hero__lede {
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-hero__lede p {
  max-width: 36em;
  margin: 0;
  color: var(--mist);
  font-size: clamp(.98rem, 2.4vw, 1.08rem);
  line-height: 1.85;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 42px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-stat {
  padding: 18px 16px 16px;
  background: linear-gradient(160deg, rgba(20, 28, 69, .96), rgba(10, 15, 44, .96));
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5.4vw, 2rem);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: .01em;
}

.page-about .about-stat__label {
  margin: 8px 0 0;
  font-size: .8rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-body {
  padding: clamp(34px, 6vw, 76px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-layout {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-about .about-rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .about-rail__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 12px;
  border-left: 2px solid var(--line);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--mist);
  font-size: .88rem;
  line-height: 1.55;
  text-decoration: none;
  transition: color .3s var(--ease), background-color .3s var(--ease), border-color .3s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
  background: rgba(29, 42, 99, .62);
  border-left-color: var(--cyan);
  outline: none;
}

.page-about .about-rail__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .about-stream {
  display: grid;
  gap: clamp(38px, 6vw, 72px);
  min-width: 0;
}

.page-about .about-sec {
  scroll-margin-top: 96px;
  min-width: 0;
}

.page-about .about-sec__head {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-sec__num {
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.6vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.3;
}

.page-about .about-prose p {
  max-width: 38em;
  margin: 0 0 16px;
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 1px;
}

.page-about .about-prose a:hover,
.page-about .about-prose a:focus-visible {
  border-bottom-color: var(--gold);
  color: var(--gold);
  outline: none;
}

.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  min-width: 0;
}

.page-about .about-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  min-width: 0;
}

.page-about .about-split .about-figure {
  margin-top: 0;
}

.page-about .about-figure img,
.page-about .about-diagram {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(155deg, rgba(20, 28, 69, .92), rgba(5, 8, 26, .92));
  object-fit: cover;
}

.page-about .about-figure__caption {
  margin: 10px 0 0;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-diagram {
  padding: 10px;
  box-sizing: border-box;
}

.page-about .about-diagram text {
  font-family: var(--font-body);
}

.page-about .about-diagram__title {
  fill: var(--paper);
  font-weight: 700;
}

.page-about .about-diagram__note {
  fill: var(--mist);
}

.page-about .about-sec .divider,
.page-about .about-sec + .divider {
  margin: 0;
}

.page-about .role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .role-card {
  position: relative;
  padding: 20px 20px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  background: linear-gradient(152deg, rgba(29, 42, 99, .72), rgba(20, 28, 69, .88));
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
  transition: transform .38s var(--ease), border-color .38s var(--ease);
}

.page-about .role-card:hover,
.page-about .role-card:focus,
.page-about .role-card:focus-within {
  border-color: var(--line-cyan);
  transform: translateY(-4px);
  outline: none;
}

.page-about .role-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .role-card__title {
  margin: 10px 0 8px;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .role-card__short {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .role-card__note {
  margin: 0;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-step {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(20, 28, 69, .72);
  margin-top: 10px;
  overflow: hidden;
}

.page-about .about-step__sum {
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.page-about .about-step__code {
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-step__body {
  max-width: 40em;
  padding: 0 18px 18px;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-next {
  padding: clamp(22px, 3vw, 30px) clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(29, 42, 99, .58), rgba(10, 15, 44, .78));
}

.page-about .about-next__title {
  margin: 0 0 16px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .about-next__list {
  margin: 0;
  padding: 0;
}

.page-about .about-next__link {
  color: var(--paper);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--gold);
  outline: none;
}

.page-about .about-next__desc {
  display: block;
  margin-top: 4px;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-figure--split {
    margin-top: 6px;
  }

  .page-about .role-card:nth-child(even) {
    margin-top: 28px;
  }

  .page-about .role-card__note {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .42s var(--ease), opacity .3s var(--ease), margin-top .42s var(--ease);
  }

  .page-about .role-card:hover .role-card__note,
  .page-about .role-card:focus .role-card__note,
  .page-about .role-card:focus-within .role-card__note {
    max-height: 200px;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .about-figure--wide img {
    max-height: 460px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .role-card__note,
  .page-about .about-rail__link,
  .page-about .about-next__link {
    transition: none;
  }
}
</main>