.page-about {
  --ab-grid: rgba(46, 74, 98, 0.35);
  --ab-glow: rgba(255, 107, 44, 0.12);
  color: var(--c-text);
  background: var(--c-bg);
}

.page-about .ab-hero {
  position: relative;
  padding: 32px 0 40px;
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--ab-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.6;
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -100px;
  width: 300px;
  height: 460px;
  z-index: 0;
  background: linear-gradient(135deg, rgba(255, 107, 44, 0.22) 0%, rgba(255, 225, 53, 0.05) 100%);
  transform: skewY(-14deg) rotate(8deg);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .breadcrumb {
  margin-bottom: 32px;
}

.page-about .ab-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cta);
}

.page-about .ab-hero__tag::before {
  content: "";
  width: 9px;
  height: 9px;
  background: var(--c-warn);
  transform: rotate(45deg);
}

.page-about .ab-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 2.75rem;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-about .ab-hero__sep {
  display: inline-block;
  margin: 0 0.12em;
  color: var(--c-cta);
  font-style: normal;
}

.page-about .ab-hero__lead {
  max-width: 640px;
  margin: 0 0 28px;
  color: var(--c-muted);
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .ab-hero__stats {
  display: flex;
  flex-wrap: wrap;
  max-width: 680px;
  margin: 0;
  gap: 1px;
  border: 1px solid var(--c-line);
  background: var(--c-line);
}

.page-about .ab-hero__stat {
  flex: 1 1 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 20px;
  background: var(--c-bg-alt);
}

.page-about .ab-hero__stat .data-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-warn);
}

.page-about .ab-hero__stat .data-label {
  color: var(--c-muted);
  font-size: 0.8125rem;
}

.page-about .ab-section-tag {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 6px 12px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-cta);
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .ab-section-tag + h2 {
  margin: 14px 0 14px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(1.9rem, 5vw, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-about .ab-section-tag + h2 em {
  color: var(--c-cta);
  font-style: italic;
}

.page-about .ab-section-lead {
  margin: 0 0 28px;
  max-width: 720px;
  color: var(--c-muted);
  line-height: 1.8;
}

.page-about .ab-genesis {
  padding: 8px 0 56px;
}

.page-about .ab-genesis__grid {
  display: grid;
  gap: 28px;
}

.page-about .ab-genesis__content p {
  margin: 0 0 16px;
  color: var(--c-muted);
  line-height: 1.8;
}

.page-about .ab-genesis__lead {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--c-text);
}

.page-about .ab-genesis__motto {
  margin-top: 24px;
  padding: 16px 20px;
  border-left: 3px solid var(--c-cta);
  background: var(--ab-glow);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--c-text);
}

.page-about .ab-genesis__motto .data-label {
  display: block;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--c-cta);
  margin-bottom: 8px;
}

.page-about .ab-genesis__figure {
  margin: 0;
  border: 1px solid var(--c-line);
  padding: 6px;
  background: var(--glass-gradient);
}

.page-about .ab-milestones {
  padding: 56px 0;
  border-block: 1px solid var(--c-line);
  background: linear-gradient(180deg, rgba(18, 42, 64, 0.4) 0%, rgba(10, 27, 43, 0) 100%);
}

.page-about .ab-timeline {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 31px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cta) 0%, var(--c-line) 80%);
}

.page-about .ab-milestone {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.page-about .ab-milestone__marker {
  position: relative;
  z-index: 1;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6px;
  border: 1px solid var(--c-line);
  background: var(--c-bg);
  transition: border-color var(--dur) ease, background var(--dur) ease;
}

.page-about .ab-milestone__marker::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -5px;
  width: 10px;
  height: 10px;
  transform: translateX(-50%) rotate(45deg);
  background: var(--c-cta);
}

.page-about .ab-milestone:hover .ab-milestone__marker {
  border-color: var(--c-cta);
  background: var(--c-bg-alt);
}

.page-about .ab-milestone__year {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-warn);
}

.page-about .ab-milestone__stage {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--c-data);
}

.page-about .ab-milestone__body {
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .ab-milestone:hover .ab-milestone__body {
  border-color: rgba(255, 107, 44, 0.55);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.08);
}

.page-about .ab-milestone__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.125rem;
  line-height: 1.35;
  color: var(--c-text);
}

.page-about .ab-milestone__desc {
  margin: 0;
  color: var(--c-muted);
  line-height: 1.75;
  font-size: 0.9375rem;
}

.page-about .ab-scale {
  padding: 56px 0;
}

.page-about .ab-scale__grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-scale__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .ab-scale__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 18px;
  border: 1px solid var(--c-line);
  background: var(--glass-gradient);
  transition: border-color var(--dur) ease, transform var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .ab-scale__card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 18px;
  height: 18px;
  border-top: 3px solid var(--c-cta);
  border-left: 3px solid var(--c-cta);
}

.page-about .ab-scale__card:hover {
  border-color: var(--c-cta);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
  transform: translateY(-2px);
}

.page-about .ab-scale__card .data-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--c-warn);
}

.page-about .ab-scale__card .data-label {
  display: block;
  margin-bottom: 4px;
  color: var(--c-text);
  font-size: 0.9375rem;
  font-weight: 500;
}

.page-about .ab-scale__note {
  color: var(--c-muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.page-about .ab-scale__figure {
  margin: 0;
  border: 1px solid var(--c-line);
  padding: 6px;
  background: var(--glass-gradient);
}

.page-about .ab-promise {
  padding: 56px 0;
  border-top: 1px solid var(--c-line);
  background: linear-gradient(180deg, rgba(18, 42, 64, 0.18) 0%, rgba(10, 27, 43, 0) 100%);
}

.page-about .ab-promise__cards {
  display: grid;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .ab-promise__card {
  padding: 22px 20px;
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-cta);
  background: rgba(18, 42, 64, 0.4);
  transition: background var(--dur) ease, border-color var(--dur) ease;
}

.page-about .ab-promise__card:hover {
  background: rgba(18, 42, 64, 0.7);
  border-color: var(--c-muted);
}

.page-about .ab-promise__card--fast {
  border-left-color: var(--c-data);
}

.page-about .ab-promise__card--reliable {
  border-left-color: var(--c-warn);
}

.page-about .ab-promise__card--pro {
  border-left-color: var(--c-cta);
}

.page-about .ab-promise__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--c-text);
}

.page-about .ab-promise__card--fast .ab-promise__name {
  color: var(--c-data);
}

.page-about .ab-promise__card--reliable .ab-promise__name {
  color: var(--c-warn);
}

.page-about .ab-promise__card--pro .ab-promise__name {
  color: var(--c-cta);
}

.page-about .ab-promise__desc {
  margin: 0;
  color: var(--c-muted);
  line-height: 1.8;
  font-size: 0.9375rem;
}

.page-about .ab-promise__figure {
  margin: 0;
  max-width: 720px;
  border: 1px solid var(--c-line);
  padding: 6px;
  background: var(--glass-gradient);
}

.page-about .ab-guide {
  padding: 56px 0 80px;
}

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

.page-about .ab-guide__card {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 4px 16px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--c-line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--c-text);
  text-decoration: none;
  transition: border-color var(--dur) ease, background var(--dur) ease;
}

.page-about .ab-guide__card:hover {
  border-color: var(--c-cta);
  background: rgba(255, 107, 44, 0.07);
}

.page-about .ab-guide__card-index {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-cta);
}

.page-about .ab-guide__card-label {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--c-text);
}

.page-about .ab-guide__card-desc {
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-about .ab-genesis__figure img,
.page-about .ab-scale__figure img,
.page-about .ab-promise__figure img {
  display: block;
  max-width: 100%;
  height: auto;
}

@media (min-width: 720px) {
  .page-about .ab-hero__title {
    font-size: 4rem;
  }

  .page-about .ab-hero__stats {
    flex-wrap: nowrap;
  }

  .page-about .ab-hero__stat {
    flex: 1 1 0;
  }

  .page-about .ab-genesis__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-genesis__figure {
    margin-top: 8px;
  }

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

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

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

@media (min-width: 1024px) {
  .page-about .ab-hero {
    padding: 48px 0 64px;
  }

  .page-about .ab-hero__title {
    font-size: 5rem;
  }

  .page-about .ab-hero__lead {
    font-size: 1.125rem;
  }

  .page-about .ab-section-tag {
    padding: 8px 14px;
    font-size: 0.875rem;
  }

  .page-about .ab-section-tag + h2 {
    font-size: 3rem;
  }

  .page-about .ab-genesis {
    padding: 16px 0 72px;
  }

  .page-about .ab-genesis__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    gap: 48px;
  }

  .page-about .ab-scale__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .ab-scale__cards {
    gap: 16px;
  }

  .page-about .ab-scale__card {
    padding: 24px 20px;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-scale__card,
  .page-about .ab-milestone__body,
  .page-about .ab-milestone__marker,
  .page-about .ab-guide__card,
  .page-about .ab-promise__card {
    transition: none;
  }
}