.page-about {
  --about-cut: 14px;
  --about-gap: clamp(28px, 5vw, 64px);
  color: var(--ivory);
  background: var(--void);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about .crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .crumbs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.page-about .crumbs-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--meteor);
}

.page-about .crumbs-list a {
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .crumbs-list a:hover,
.page-about .crumbs-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-line);
}

.page-about .about-hero {
  display: grid;
  gap: var(--about-gap);
  padding-block: clamp(24px, 5vw, 56px) clamp(36px, 6vw, 72px);
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: 0.02em;
  font-weight: 600;
  color: var(--ivory);
  max-width: 20ch;
}

.page-about .lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 2.2vw, 17px);
  color: var(--rock);
}

.page-about .hero-deck {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .hero-facts > div {
  background: var(--night);
  padding: 14px 16px;
}

.page-about .hero-facts dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--meteor);
}

.page-about .hero-facts dd {
  margin: 6px 0 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--gold);
}

.page-about .hero-frame {
  margin: 0;
  position: relative;
  border: 1px solid var(--line-strong);
  clip-path: polygon(var(--about-cut) 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%, 0 var(--about-cut));
  overflow: hidden;
  background: var(--night);
}

.page-about .hero-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.88;
}

.page-about .media-frame figcaption {
  padding: 12px 16px;
  font-size: 12px;
  color: var(--rock);
  background: var(--night);
  border-top: 1px solid var(--line);
}

.page-about .about-shell {
  display: grid;
  gap: 0;
  padding-bottom: clamp(40px, 7vw, 90px);
}

.page-about .chapter-rail {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-bottom: var(--about-gap);
}

.page-about .rail-label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--meteor);
}

.page-about .rail-list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  scrollbar-width: thin;
}

.page-about .rail-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  padding: 8px 13px;
  font-size: 13px;
  color: var(--rock);
  text-decoration: none;
  border: 1px solid var(--line);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .rail-list a .mono {
  color: var(--gold);
  font-size: 11px;
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--ivory);
  border-color: var(--cyan-line);
  background: rgba(66, 232, 209, 0.08);
}

.page-about .chapter-body {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
  min-width: 0;
}

.page-about .chapter {
  position: relative;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-about .chapter p {
  margin: 0 0 14px;
  max-width: 36em;
  color: var(--rock);
  font-size: 16px;
}

.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .sec-index {
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.04em;
  flex: none;
}

.page-about .sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1.25;
  letter-spacing: 0.03em;
  font-weight: 600;
  color: var(--ivory);
}

.page-about .quote-line {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 2px solid var(--cyan);
  background: linear-gradient(90deg, rgba(42, 27, 74, 0.7), rgba(7, 13, 31, 0));
  color: var(--ivory);
  font-size: 16px;
  font-style: normal;
}

.page-about .media-frame--wide,
.page-about .media-frame--tall {
  margin: 22px 0;
  border: 1px solid var(--line);
  background: var(--night);
  clip-path: polygon(var(--about-cut) 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%, 0 var(--about-cut));
  overflow: hidden;
}

.page-about .media-frame--wide img,
.page-about .media-frame--tall img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .flow-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .flow-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 4px 12px;
  padding: 16px;
  background: var(--night);
  font-size: 15px;
  color: var(--rock);
}

.page-about .flow-list li .mono {
  grid-row: span 2;
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.page-about .flow-list li strong {
  color: var(--ivory);
  font-size: 15px;
  letter-spacing: 0.02em;
}

.page-about .chapter--band {
  margin-inline: calc(var(--gutter) * -1);
  padding: 30px var(--gutter) 36px;
  background:
    radial-gradient(120% 80% at 85% 0%, rgba(42, 27, 74, 0.9), rgba(7, 13, 31, 0) 62%),
    var(--night);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 20px 0;
}

.page-about .filter-btn {
  font: inherit;
  font-size: 13px;
  padding: 7px 14px;
  color: var(--rock);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  cursor: pointer;
  transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  color: var(--ivory);
  border-color: var(--cyan-line);
}

.page-about .filter-btn[aria-pressed="true"] {
  color: var(--void);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .filter-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--meteor);
  letter-spacing: 0.06em;
}

.page-about .compare-grid {
  display: grid;
  gap: 14px;
}

.page-about .compare-card {
  padding: 20px;
  border: 1px solid var(--line-strong);
  background: rgba(14, 24, 48, 0.85);
  clip-path: polygon(var(--about-cut) 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%, 0 var(--about-cut));
}

.page-about .compare-card--after {
  border-color: var(--cyan-line);
  box-shadow: var(--glow-cyan);
}

.page-about .compare-card h3 {
  margin: 6px 0 8px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ivory);
  font-weight: 600;
}

.page-about .compare-card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--rock);
}

.page-about .compare-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-about .compare-card--after .compare-label {
  color: var(--moss);
}

.page-about .tag-wall {
  margin-top: 24px;
}

.page-about .route {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  position: relative;
}

.page-about .route::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--cyan-line), transparent);
}

.page-about .route-node {
  position: relative;
  padding: 0 0 26px 30px;
}

.page-about .route-node:last-child {
  padding-bottom: 0;
}

.page-about .route-dot {
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--gold);
}

.page-about .route-node:hover .route-dot,
.page-about .route-node:focus-within .route-dot {
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.page-about .route-ver {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .route-node h3 {
  margin: 4px 0 6px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ivory);
  line-height: 1.45;
}

.page-about .route-note {
  margin: 0;
  font-size: 14.5px;
  color: var(--rock);
  max-width: 34em;
}

.page-about .role-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .role-item {
  padding: 18px;
  background: var(--night);
}

.page-about .role-num {
  margin: 0;
  font-size: 20px;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .role-item h3 {
  margin: 4px 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ivory);
}

.page-about .role-item p:last-child {
  margin: 0;
  font-size: 14.5px;
  color: var(--rock);
}

.page-about .co-links {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .link-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 14px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--ivory);
  border: 1px solid var(--line-strong);
  background: rgba(7, 13, 31, 0.6);
  transition: border-color var(--dur) ease, background-color var(--dur) ease, transform var(--dur) ease;
}

.page-about .link-card .mono {
  grid-column: 1;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .link-card strong {
  grid-column: 1;
  font-size: 15.5px;
  font-weight: 600;
}

.page-about .link-arrow {
  grid-column: 2;
  grid-row: 1 / span 2;
  color: var(--gold);
  font-size: 18px;
}

.page-about .link-card:hover,
.page-about .link-card:focus-visible {
  border-color: var(--cyan-line);
  background: rgba(42, 27, 74, 0.6);
  transform: translateX(3px);
}

.page-about .region-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .region-icp {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--meteor);
}

.page-about .region-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 760px) {
  .page-about .hero-facts > div {
    padding: 16px 20px;
  }

  .page-about .flow-list li {
    grid-template-columns: 44px 1fr;
    padding: 18px 22px;
  }

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

  .page-about .compare-card:last-child {
    grid-column: 1 / -1;
  }

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

  .page-about .co-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .link-card {
    grid-template-columns: 1fr auto;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

  .page-about .about-shell {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .chapter-rail {
    position: sticky;
    top: 96px;
    margin-bottom: 0;
    padding-top: 26px;
    border-top: 1px solid var(--line);
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding: 0;
  }

  .page-about .rail-list a {
    display: flex;
    justify-content: flex-start;
    padding: 7px 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    clip-path: none;
    background: transparent;
    font-size: 13.5px;
  }

  .page-about .rail-list a:hover,
  .page-about .rail-list a:focus-visible {
    background: transparent;
    color: var(--cyan);
    border-bottom-color: var(--cyan-line);
  }

  .page-about .chapter--band {
    margin-inline: 0;
    padding: 34px clamp(24px, 3vw, 40px) 40px;
    clip-path: polygon(var(--about-cut) 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%, 0 var(--about-cut));
  }

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

  .page-about .compare-card:last-child {
    grid-column: 1 / -1;
  }

  .page-about .role-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .route {
    margin-top: 30px;
  }

  .page-about .route-node {
    padding-left: 40px;
    padding-bottom: 30px;
  }

  .page-about .chapter p {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .link-card,
  .page-about .filter-btn,
  .page-about .rail-list a {
    transition: none;
  }

  .page-about .link-card:hover,
  .page-about .link-card:focus-visible {
    transform: none;
  }
}
</main>