.page-about {
  --band-space: clamp(56px, 7vw, 96px);
  --section-space: clamp(40px, 5vw, 80px);
  --rail-offset: 28px;
  background: var(--color-bg-deep);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about a {
  color: var(--color-accent-bright);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about a:hover {
  color: var(--color-white);
  border-bottom-color: var(--color-accent);
}

.page-about .btn {
  margin: 0;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.page-about .story-breadcrumb-wrap {
  padding-top: 16px;
  padding-bottom: 4px;
}

.page-about .story-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.page-about .story-breadcrumb a {
  color: var(--color-text-secondary);
  border-bottom: 1px solid transparent;
}

.page-about .crumb-sep {
  color: var(--color-accent);
  opacity: 0.7;
}

.page-about .story-hero {
  position: relative;
  padding-block: 24px var(--band-space);
}

.page-about .hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 82% 18%, rgba(123, 47, 247, 0.28) 0, transparent 38%),
    radial-gradient(circle at 12% 82%, rgba(198, 255, 0, 0.12) 0, transparent 30%);
}

.page-about .hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.45;
  mask-image: linear-gradient(135deg, black, transparent 72%);
}

.page-about .story-hero-panel {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .story-hero-main {
  padding-top: 16px;
}

.page-about .hero-kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--color-accent-bright);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.page-about .story-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4.5vw, 2.5rem);
  line-height: 1.25;
  color: var(--color-white);
  margin: 0;
}

.page-about .story-hero-lead {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-accent-bright);
  letter-spacing: 0.04em;
  margin: 14px 0 0;
}

.page-about .story-hero-text {
  max-width: 680px;
  color: var(--color-text-secondary);
  margin: 14px 0 0;
}

.page-about .story-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding-block: 18px;
  align-content: start;
}

.page-about .hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-meta-num {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-accent-bright);
  line-height: 1.2;
}

.page-about .hero-meta-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.page-about .hero-meta-note {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
}

.page-about .hero-sync-line {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.page-about .page-about-section {
  padding-block: var(--section-space);
}

.page-about .section-band {
  position: relative;
  padding-block: var(--band-space);
}

.page-about .section-band::before {
  content: "";
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-bright) 46%, transparent 78%);
}

.page-about .concept-band {
  background: var(--color-bg-indigo);
}

.page-about .scale-band {
  background: var(--color-wine);
}

.page-about .ops-band {
  background: var(--color-teal);
}

.page-about .section-head {
  margin-bottom: 30px;
}

.page-about .section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--color-accent-bright);
  letter-spacing: 0.14em;
  margin-bottom: 6px;
}

.page-about .section-title {
  font-family: var(--font-heading);
  font-size: var(--fs-section);
  line-height: 1.3;
  color: var(--color-white);
  margin: 0;
}

.page-about .section-sub {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--color-text-secondary);
  margin: 8px 0 0;
  max-width: 640px;
}

.page-about .story-figure {
  margin: 0;
  border: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.02);
}

.page-about .story-figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .story-figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-line);
}

.page-about .concept-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .concept-copy p + p,
.page-about .scale-copy p + p,
.page-about .tech-copy p + p,
.page-about .creds-copy p + p {
  margin-top: 16px;
}

.page-about .concept-copy .btn {
  margin-top: 22px;
}

.page-about .timeline-track {
  position: relative;
  border-left: 1px solid rgba(123, 47, 247, 0.45);
  margin-left: 14px;
  padding-left: var(--rail-offset);
}

.page-about .timeline-node {
  position: relative;
  padding-block: 10px;
}

.page-about .timeline-marker {
  position: absolute;
  left: calc(-1 * var(--rail-offset) - 9px);
  top: 24px;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-accent-bright);
  background: var(--color-bg-deep);
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .timeline-marker svg {
  color: var(--color-accent-bright);
}

.page-about .timeline-content {
  border-bottom: 1px solid var(--color-line);
  padding-block: 12px;
  transition: background 0.2s var(--ease);
}

.page-about .timeline-node:hover .timeline-content {
  background: rgba(198, 255, 0, 0.035);
}

.page-about .timeline-toggle {
  width: 100%;
  background: none;
  border: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  cursor: pointer;
  color: var(--color-text);
  text-align: left;
  font: inherit;
}

.page-about .timeline-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .timeline-version {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--color-accent-bright);
  letter-spacing: 0.08em;
}

.page-about .timeline-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.page-about .timeline-detail {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  padding-top: 10px;
  padding-bottom: 6px;
}

.page-about .timeline-detail p {
  margin: 0;
  max-width: 720px;
}

.page-about [data-accordion-toggle][aria-expanded="false"] + .timeline-detail {
  display: none;
}

.page-about [data-accordion-toggle][aria-expanded="true"] + .timeline-detail {
  display: block;
}

.page-about .scale-layout,
.page-about .tech-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 30px;
}

.page-about .metric-cell {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 18px 14px;
}

.page-about .metric-num {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-accent-bright);
  line-height: 1.2;
}

.page-about .metric-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.page-about .tech-flow {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}

.page-about .tech-flow li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.9rem;
  color: var(--color-text);
}

.page-about .flow-step {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--color-accent-bright);
  letter-spacing: 0.06em;
}

.page-about .tech-section {
  background: linear-gradient(180deg, var(--color-bg-deep), var(--color-bg) 40%, var(--color-bg-deep));
}

.page-about .ops-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ops-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px;
}

.page-about .ops-card-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-white);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .ops-card-title::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent-bright);
  display: inline-block;
  flex: 0 0 auto;
}

.page-about .ops-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.page-about .creds-section {
  background: linear-gradient(180deg, var(--color-bg-deep), var(--color-bg) 30%, var(--color-bg-deep));
}

.page-about .creds-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .creds-copy .btn {
  margin-top: 22px;
}

.page-about .creds-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .creds-item {
  display: flex;
  gap: 14px;
  border: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.02);
  padding: 18px;
}

.page-about .creds-index {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-accent);
  line-height: 1;
}

.page-about .creds-title {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--color-white);
  letter-spacing: 0.03em;
}

.page-about .creds-desc {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.page-about .page-about-databoard {
  background:
    linear-gradient(180deg, transparent, rgba(123, 47, 247, 0.1)),
    var(--color-bg);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding-block: 44px;
}

.page-about .databoard-head {
  margin-bottom: 26px;
}

.page-about .databoard-title {
  font-family: var(--font-heading);
  font-size: var(--fs-section);
  color: var(--color-white);
  margin: 4px 0 0;
}

.page-about .databoard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .board-item {
  border: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.02);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .board-item-primary {
  grid-column: span 2;
  border-color: var(--color-accent);
}

.page-about .board-num {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-accent-bright);
  line-height: 1.2;
}

.page-about .board-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--color-white);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-about .board-desc {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.page-about .databoard-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

@media (min-width: 900px) {
  .page-about .story-hero-panel {
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .story-hero-meta {
    grid-template-columns: 1fr 1fr;
    border: 1px solid var(--color-line);
    padding: 20px;
    margin-top: 24px;
  }

  .page-about .hero-meta-note {
    grid-column: auto;
  }

  .page-about .concept-layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .scale-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .tech-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .metric-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-about .creds-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .creds-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .databoard-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .board-item-primary {
    grid-column: auto;
  }
}