.page-about {
  --about-aside-w: 322px;
  padding: var(--sp-5) 0 var(--sp-7);
  color: var(--paper);
}

.page-about .breadcrumb {
  margin-bottom: var(--sp-3);
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper-60);
}
.page-about .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}
.page-about .breadcrumb-link {
  color: var(--paper-60);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--green);
  border-bottom-color: var(--green);
}
.page-about .breadcrumb-current {
  color: var(--paper);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-4);
}
.page-about .about-stream {
  min-width: 0;
}
.page-about .about-aside {
  min-width: 0;
  order: -1;
}

.page-about .about-title {
  margin: var(--sp-2) 0 var(--sp-3);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-about .about-title::after {
  content: "";
  display: block;
  width: 64px;
  height: 6px;
  margin-top: var(--sp-3);
  background: var(--green);
  transform: skewX(-24deg);
}
.page-about .about-lead {
  max-width: 60ch;
  color: var(--paper-80);
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.78;
}
.page-about .about-hero-media {
  margin-top: var(--sp-4);
}

.page-about .about-section {
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line-soft);
}
.page-about .about-section:first-of-type {
  margin-top: var(--sp-5);
  padding-top: 0;
  border-top: 0;
}
.page-about .about-section .section-title {
  max-width: 22ch;
}
.page-about .about-section .section-desc {
  max-width: 58ch;
  color: var(--paper-60);
}

.page-about .pillars {
  display: grid;
  gap: var(--sp-3);
  margin: var(--sp-4) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .pillar {
  padding-left: var(--sp-3);
  border-left: 2px solid var(--green);
}
.page-about .pillar-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .pillar p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper-60);
}

.page-about .project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: var(--sp-3) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .region-matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: var(--sp-4) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .region-cell {
  display: block;
  min-height: 84px;
  padding: var(--sp-2) var(--sp-3);
  background: var(--ink-850);
  transition: background 200ms var(--ease);
  cursor: default;
}
.page-about .region-cell:hover,
.page-about .region-cell:focus {
  background: var(--ink-700);
}
.page-about .region-cell:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: -2px;
}
.page-about .region-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--green);
}
.page-about .region-detail {
  display: block;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--paper-60);
  transition: max-height 220ms var(--ease), opacity 220ms var(--ease), margin-top 220ms var(--ease);
}
.page-about .region-cell:hover .region-detail,
.page-about .region-cell:focus .region-detail {
  max-height: 64px;
  margin-top: 6px;
  opacity: 1;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.page-about .team-block {
  display: grid;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
}
.page-about .team-console {
  display: grid;
  gap: 1px;
  margin: var(--sp-3) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .team-slot {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp-2) var(--sp-3);
  align-items: start;
  padding: var(--sp-3);
  background: var(--ink-800);
}
.page-about .team-num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--green);
}
.page-about .team-role {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .team-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-60);
}
.page-about .team-media {
  margin: 0;
}

.page-about .era-line {
  display: flex;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
  padding: var(--sp-3) 0 var(--sp-2);
  overflow-x: auto;
  border-top: 1px solid var(--line);
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.page-about .era-node {
  flex: 0 0 auto;
  min-width: 128px;
  padding-left: var(--sp-2);
  border-left: 1px solid var(--line-strong);
  text-decoration: none;
  scroll-snap-align: start;
  transition: border-color 200ms var(--ease);
}
.page-about .era-node:hover,
.page-about .era-node:focus-visible {
  border-left-color: var(--green);
  outline: none;
}
.page-about .era-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--green);
}
.page-about .era-node:hover .era-year,
.page-about .era-node:focus-visible .era-year {
  color: var(--paper);
}
.page-about .era-name {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--paper-60);
}
.page-about .era-stages {
  margin-top: var(--sp-4);
}
.page-about .era-stage {
  scroll-margin-top: 104px;
  padding: var(--sp-2) 0 var(--sp-2) var(--sp-3);
  border-left: 2px solid var(--line);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}
.page-about .era-stage + .era-stage {
  margin-top: var(--sp-2);
}
.page-about .era-stage:target {
  border-left-color: var(--green);
  background: var(--green-dim);
}
.page-about .era-stage-title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .era-stage p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-60);
}
.page-about .era-media {
  margin-top: var(--sp-4);
}

.page-about .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 var(--sp-5);
  margin-top: var(--sp-4);
  border-top: 1px solid var(--line);
}
.page-about .coop-item {
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .coop-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--magenta);
}
.page-about .coop-title {
  margin: 8px 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .coop-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-60);
}
.page-about .coop-note {
  margin-top: var(--sp-3);
  font-size: 13px;
  line-height: 1.8;
  color: var(--paper-40);
  max-width: 62ch;
}
.page-about .about-inline-link {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--green-dim);
}
.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--green);
}

.page-about .about-aside-inner {
  padding: var(--sp-3);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
}
.page-about .aside-eyebrow {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mint);
}
.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .stat {
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}
.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  letter-spacing: -0.03em;
  color: var(--green);
}
.page-about .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--paper-60);
}
.page-about .aside-note {
  margin: var(--sp-3) 0 0;
  padding-top: var(--sp-2);
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.7;
  color: var(--paper-40);
}
.page-about .aside-links {
  margin: var(--sp-2) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .aside-link {
  display: block;
  padding: 9px 0;
  font-size: 13px;
  color: var(--paper-80);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  transition: color 180ms var(--ease), padding-left 180ms var(--ease);
}
.page-about .aside-link:hover,
.page-about .aside-link:focus-visible {
  color: var(--green);
  padding-left: 6px;
}

.page-about .team-media,
.page-about .era-media {
  overflow: hidden;
  border-radius: var(--radius-m);
}

@media (min-width: 560px) {
  .page-about .region-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--sp-4);
  }
}

@media (min-width: 900px) {
  .page-about .region-matrix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team-block {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding-top: var(--sp-6);
  }
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) var(--about-aside-w);
    gap: var(--sp-6);
    align-items: start;
  }
  .page-about .about-aside {
    order: 0;
    position: sticky;
    top: 96px;
  }
  .page-about .about-aside-inner {
    background: rgba(17, 21, 27, 0.72);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-glass);
  }
  .page-about .about-lead {
    max-width: 54ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .region-detail,
  .page-about .region-cell,
  .page-about .era-stage,
  .page-about .aside-link,
  .page-about .breadcrumb-link {
    transition: none;
  }
  .page-about .region-detail {
    max-height: none;
    opacity: 1;
    margin-top: 6px;
  }
}
<<<END>>>