.page-about {
  --about-border: rgba(164, 77, 255, 0.26);
  --about-glow: rgba(164, 77, 255, 0.12);
  --about-space: clamp(4rem, 9vw, 7.5rem);
  position: relative;
  overflow-x: hidden;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
}

.page-about .ab-head {
  position: relative;
  padding: 3rem clamp(1.25rem, 5vw, 3rem) 4rem;
  border-bottom: 1px solid var(--about-border);
}

.page-about .ab-head-inner {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
}

.page-about .ab-head-flare {
  position: absolute;
  top: 2.5rem;
  right: 58%;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(5rem, 16vw, 11rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(164, 77, 255, 0.2);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .crumb {
  margin-bottom: 1.75rem;
}

.page-about .ab-eyebrow {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-gold);
  margin: 0 0 0.75rem;
}

.page-about .ab-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  max-width: 19ch;
  margin: 0 0 1.25rem;
  color: var(--c-text);
}

.page-about .ab-lead {
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.85;
  color: var(--c-muted);
  margin: 0;
}

.page-about .ab-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2.25rem;
}

.page-about .ab-index a {
  font-family: var(--font-head);
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-text);
  text-decoration: none;
  padding: 0.6rem 1rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  background: rgba(31, 18, 51, 0.55);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .ab-index a:hover,
.page-about .ab-index a:focus-visible {
  border-color: rgba(245, 192, 74, 0.55);
  color: var(--c-gold);
}

.page-about .ab-chapter {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  padding: var(--about-space) clamp(1.25rem, 5vw, 3rem);
  border-bottom: 1px solid var(--about-border);
  scroll-margin-top: 2rem;
}

.page-about .ab-chapter::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at 78% 12%, var(--glow-color, var(--about-glow)), transparent 64%);
}

.page-about .ab-chapter::after {
  content: attr(data-index);
  position: absolute;
  top: 1.2rem;
  right: max(0.5rem, calc(50vw - 520px));
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(6rem, 18vw, 13rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(164, 77, 255, 0.09);
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

.page-about .ab-chapter > * {
  position: relative;
  z-index: 1;
}

.page-about .ab-chapter-origin::before {
  --glow-color: rgba(245, 192, 74, 0.1);
}

.page-about .ab-chapter-milestones::before {
  --glow-color: rgba(164, 77, 255, 0.14);
}

.page-about .ab-chapter-principles::before {
  --glow-color: rgba(63, 208, 216, 0.09);
}

.page-about .ab-chapter-collection::before {
  --glow-color: rgba(255, 122, 60, 0.1);
}

.page-about .ab-chapter-scale::before {
  --glow-color: rgba(76, 175, 80, 0.1);
}

.page-about .chapter-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  align-self: start;
}

.page-about .chapter-no {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(3rem, 6vw, 5.25rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  background: linear-gradient(135deg, #F5C04A 0%, #FF7A3C 48%, #3FD0D8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  filter: drop-shadow(0 6px 16px rgba(255, 122, 60, 0.22));
}

.page-about .chapter-kicker {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin: 0;
}

.page-about .chapter-content {
  max-width: 680px;
  min-width: 0;
}

.page-about .chapter-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.8vw, 2.7rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--c-text);
  margin: 0 0 1rem;
}

.page-about .chapter-desc {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-muted);
  max-width: 50ch;
  margin: 0 0 1.75rem;
}

.page-about .chapter-content p {
  color: var(--c-muted);
  line-height: 1.85;
  max-width: 62ch;
  margin: 0 0 1rem;
}

.page-about .chapter-content p.lead {
  color: var(--c-text);
  font-size: 1.06rem;
}

.page-about .ab-copy > p:last-child {
  margin-bottom: 0;
}

.page-about .ab-origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.page-about .ab-fig {
  margin: 0;
  padding: 0.75rem;
  border: 1px solid var(--about-border);
  border-radius: var(--radius-md);
  background: rgba(31, 18, 51, 0.6);
}

.page-about .ab-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--radius-md) - 4px);
}

.page-about .ab-fig figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--c-muted);
}

.page-about .ab-timeline {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  border-left: 1px solid var(--about-border);
}

.page-about .ab-timeline-item {
  position: relative;
  padding: 0 0 2rem 1.5rem;
}

.page-about .ab-timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .ab-timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 0.4rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 2px solid var(--c-purple);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .ab-timeline-item:hover::before,
.page-about .ab-timeline-item:focus-within::before {
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(63, 208, 216, 0.2);
}

.page-about .ab-tl-year {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 0.3rem;
}

.page-about .ab-tl-name {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.35rem;
  line-height: 1.3;
  color: var(--c-text);
  margin: 0 0 0.4rem;
}

.page-about .ab-tl-desc {
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--c-muted);
  max-width: 44ch;
  margin: 0;
}

.page-about .ab-tl-desc a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 208, 216, 0.4);
  transition: border-color 0.2s ease;
}

.page-about .ab-tl-desc a:hover {
  border-bottom-color: transparent;
}

.page-about .ab-principles {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 2rem;
  border-top: 1px solid var(--about-border);
}

.page-about .ab-principle {
  padding: 1.5rem 0.5rem;
  border-bottom: 1px solid var(--about-border);
}

.page-about .ab-principle-index {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-about .ab-principle h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: var(--c-text);
  margin: 0.5rem 0 0.6rem;
}

.page-about .ab-principle p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--c-muted);
  max-width: 40ch;
  margin: 0;
}

.page-about .ab-collection-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
  margin-top: 1.5rem;
}

.page-about .ab-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-stat {
  border: 1px solid var(--about-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  background: rgba(31, 18, 51, 0.5);
}

.page-about .ab-stat-num {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.1;
  color: var(--c-gold);
  margin: 0 0 0.3rem;
}

.page-about .ab-stat-label {
  display: block;
  margin: 0;
  color: var(--c-muted);
  font-size: 0.86rem;
}

.page-about .ab-scale-visual {
  margin-top: 2rem;
  background: rgba(31, 18, 51, 0.4);
  border: 1px solid var(--about-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.page-about .ab-scale-visual h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1rem;
  margin: 0 0 0.2rem;
  color: var(--c-text);
}

.page-about .ab-scale-visual p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--c-muted);
  margin: 0 0 1.25rem;
  max-width: 80ch;
}

.page-about .ab-chart {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-chart-gridline {
  stroke: rgba(245, 240, 245, 0.12);
  stroke-width: 1;
}

.page-about .ab-chart-bar {
  transition: filter 0.2s ease;
}

.page-about .ab-chart-bar:hover {
  filter: brightness(1.4);
}

.page-about .ab-chart-bar-gold {
  fill: url(#abGradGold);
}

.page-about .ab-chart-bar-cyan {
  fill: url(#abGradCyan);
}

.page-about .ab-chart-value {
  fill: var(--c-gold);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 13px;
}

.page-about .ab-chart-caption {
  fill: var(--c-muted);
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 600;
}

.page-about .ab-honors {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .ab-honors li {
  position: relative;
  padding-left: 1.5rem;
  line-height: 1.75;
  color: var(--c-muted);
  font-size: 0.96rem;
}

.page-about .ab-honors li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 10px;
  height: 2px;
  background: var(--c-gold);
}

.page-about .ab-milestone-bg {
  display: none;
}

.page-about .ab-next {
  max-width: 1080px;
  margin: 0 auto;
  padding: 4rem clamp(1.25rem, 5vw, 3rem);
  border-bottom: 1px solid rgba(164, 77, 255, 0.28);
}

.page-about .ab-next h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.2;
  max-width: 20ch;
  margin: 0.5rem 0 1rem;
}

.page-about .ab-next-desc {
  color: var(--c-muted);
  max-width: 55ch;
}

.page-about .ab-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .ab-chapter:target {
  animation: ab-target-glow 1.2s ease;
}

@keyframes ab-target-glow {
  0% {
    background-color: rgba(164, 77, 255, 0.14);
  }
  100% {
    background-color: transparent;
  }
}

@supports (animation-timeline: view()) {
  .page-about .ab-timeline-item {
    animation: ab-item-glow linear;
    animation-timeline: view(block);
    animation-range: entry 20% entry 80%;
  }

  @keyframes ab-item-glow {
    0% {
      background-color: transparent;
    }
    40% {
      background-color: rgba(63, 208, 216, 0.07);
    }
    100% {
      background-color: rgba(164, 77, 255, 0.05);
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-chapter:target {
    animation: none;
  }

  .page-about .ab-timeline-item {
    animation: none !important;
  }
}

@media (min-width: 768px) {
  .page-about .ab-chapter {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 3rem;
  }

  .page-about .chapter-meta {
    display: block;
    position: sticky;
    top: 2rem;
  }

  .page-about .chapter-kicker {
    margin-top: 0.75rem;
  }

  .page-about .ab-principles {
    grid-template-columns: repeat(3, 1fr);
    column-gap: 1rem;
  }

  .page-about .ab-principle {
    padding: 1.5rem 1.25rem 1.5rem 0;
    border-bottom: 0;
    border-right: 1px solid var(--about-border);
  }

  .page-about .ab-principle:last-child {
    border-right: 0;
    padding-right: 0;
  }

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

@media (min-width: 860px) {
  .page-about .ab-origin-grid {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 2rem;
    align-items: start;
  }

  .page-about .ab-collection-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2rem;
  }

  .page-about .ab-fig-collection {
    margin-top: 0.25rem;
  }
}

@media (min-width: 900px) {
  .page-about .ab-milestone-bg {
    display: block;
    position: absolute;
    top: 3rem;
    right: max(0.5rem, calc(50vw - 520px));
    width: 360px;
    height: 200px;
    z-index: 0;
    opacity: 0.35;
    pointer-events: none;
  }

  .page-about .ab-milestone-bg img {
    display: block;
    width: 360px;
    height: 200px;
    object-fit: contain;
    filter: blur(1px) saturate(0.8);
  }

  .page-about .ab-timeline {
    border-left: 0;
    border-top: 1px solid var(--about-border);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    column-gap: 1.25rem;
  }

  .page-about .ab-timeline-item {
    padding: 1.5rem 1rem 0 0;
  }

  .page-about .ab-timeline-item::before {
    left: 0;
    top: -5px;
  }
}