.page-about {
  --ab-muted: rgba(248, 250, 252, 0.74);
  --ab-faint: rgba(248, 250, 252, 0.5);
  --ab-line: rgba(248, 250, 252, 0.14);
  --ab-surface: rgba(255, 255, 255, 0.07);
  position: relative;
  background: linear-gradient(180deg, var(--deep-space) 0%, var(--midnight) 120%);
  color: var(--cloud);
  overflow-x: hidden;
}

.page-about .ab-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  font-size: 13px;
  color: var(--steel);
}

.page-about .ab-breadcrumb a {
  color: var(--steel);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

.page-about .ab-breadcrumb a:hover {
  color: var(--volt);
}

.page-about .ab-breadcrumb-sep {
  color: var(--steel);
  opacity: 0.6;
}

.page-about .ab-breadcrumb-current {
  color: var(--cloud);
}

.page-about .ab-hero {
  position: relative;
  display: grid;
  gap: 28px;
  padding-top: 32px;
  padding-bottom: 44px;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--volt) 0%, transparent 40%, var(--flame) 100%);
  border-radius: 2px;
  opacity: 0.7;
}

.page-about .ab-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--volt);
  margin-bottom: 16px;
}

.page-about .ab-kicker-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--flame);
  display: inline-block;
  box-shadow: 0 0 12px var(--flame);
}

.page-about .ab-hero-title {
  font-family: var(--headline-font);
  font-size: clamp(30px, 8vw, 58px);
  line-height: 1.05;
  letter-spacing: 0.01em;
  transform: skewX(-3deg);
  margin-bottom: 18px;
  color: var(--cloud);
  max-width: 13em;
}

.page-about .ab-hero-lead {
  color: var(--ab-muted);
  font-size: 16px;
  line-height: 1.75;
  max-width: 40em;
  margin-bottom: 28px;
}

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

.page-about .ab-meta-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 16px 14px;
}

.page-about .ab-meta-item:first-child {
  grid-column: 1 / -1;
}

.page-about .ab-meta-num {
  display: block;
  font-family: var(--headline-font);
  font-size: clamp(22px, 5vw, 32px);
  color: var(--volt);
  transform: skewX(-3deg);
}

.page-about .ab-meta-label {
  display: block;
  font-size: 12px;
  color: var(--ab-faint);
  margin-top: 4px;
}

.page-about .ab-hero-visual {
  position: relative;
}

.page-about .ab-hero-visual::before {
  content: "";
  position: absolute;
  inset: -10%;
  background: conic-gradient(from 160deg at 70% 30%, rgba(198, 255, 0, 0.3), transparent 32%, rgba(255, 107, 0, 0.26) 62%, transparent 70%);
  filter: blur(34px);
  border-radius: 50%;
  z-index: 0;
}

.page-about .ab-hero-img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 280px;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-lg);
  box-shadow: 0 28px 64px rgba(5, 13, 31, 0.5);
  display: block;
}

.page-about .ab-layout {
  display: grid;
  gap: 0;
  padding-top: 20px;
  padding-bottom: 40px;
}

.page-about .ab-index {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 18px;
  scrollbar-width: none;
}

.page-about .ab-index::-webkit-scrollbar {
  display: none;
}

.page-about .ab-index-label {
  display: none;
}

.page-about .ab-index-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--ab-line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--cloud);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
}

.page-about .ab-index-num {
  font-family: var(--headline-font);
  font-size: 12px;
  color: var(--volt);
}

.page-about .ab-index-link:hover {
  border-color: var(--volt);
  color: var(--volt);
}

.page-about .ab-index-cta {
  display: none;
}

.page-about .ab-sections {
  min-width: 0;
}

.page-about .ab-section {
  padding: 44px 0 52px;
  border-top: 1px solid var(--ab-line);
  position: relative;
}

.page-about .ab-section:first-child {
  border-top: 0;
}

.page-about .ab-section:target .ab-section-head {
  position: relative;
}

.page-about .ab-section:target .ab-section-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -12px;
  height: 3px;
  background: linear-gradient(90deg, var(--volt), transparent);
  border-radius: 3px;
}

.page-about .ab-section-head {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  margin-bottom: 26px;
  align-items: start;
}

.page-about .ab-section-num {
  font-family: var(--headline-font);
  font-size: 54px;
  line-height: 1;
  color: var(--volt);
  transform: skewX(-8deg);
  display: block;
}

.page-about .ab-section-kicker {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--flame);
  margin-bottom: 6px;
}

.page-about .ab-section-title {
  font-family: var(--headline-font);
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.2;
  color: var(--cloud);
  transform: skewX(-2deg);
}

.page-about .ab-section-body {
  display: grid;
  gap: 22px;
}

.page-about .ab-lead-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ab-muted);
  max-width: 46em;
}

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

.page-about .ab-card {
  border-radius: var(--radius-md);
  padding: 22px;
}

.page-about .glass-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
}

.page-about .ab-card-title {
  font-family: var(--headline-font);
  font-size: 19px;
  color: var(--cloud);
  margin-bottom: 10px;
}

.page-about .ab-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ab-muted);
}

.page-about .ab-source-note {
  font-size: 14px;
  color: var(--ab-faint);
  line-height: 1.7;
}

.page-about .ab-source-note a,
.page-about .ab-inline-link {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 0, 0.4);
  transition: border-color 0.3s var(--ease);
}

.page-about .ab-source-note a:hover,
.page-about .ab-inline-link:hover {
  border-bottom-color: var(--volt);
}

.page-about .ab-chart {
  background: var(--ab-surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
}

.page-about .ab-chart-meta {
  margin-bottom: 14px;
}

.page-about .ab-chart-meta p {
  font-size: 14px;
  color: var(--ab-faint);
  line-height: 1.6;
  margin-top: 6px;
}

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

.page-about .ab-chart svg text {
  font-family: var(--body-font);
}

.page-about .ab-chart-grid line,
.page-about .ab-chart-grid path {
  stroke: rgba(248, 250, 252, 0.14);
  stroke-dasharray: 3 6;
  stroke-width: 1;
}

.page-about .ab-chart-axis text,
.page-about .ab-chart-axis-num text {
  fill: rgba(248, 250, 252, 0.55);
  font-size: 11px;
}

.page-about .ab-chart-area {
  fill: rgba(198, 255, 0, 0.1);
}

.page-about .ab-chart-line {
  stroke: var(--volt);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.page-about .ab-chart-dot {
  fill: var(--flame);
  stroke: var(--deep-space);
  stroke-width: 3;
}

.page-about .ab-chart-value {
  fill: var(--volt);
  font-family: var(--headline-font);
  font-size: 17px;
}

.page-about .ab-timeline-wrap {
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(198, 255, 0, 0.5) transparent;
}

.page-about .ab-timeline {
  display: flex;
  gap: 14px;
  min-width: max-content;
  cursor: grab;
}

.page-about .ab-timeline-item {
  flex: 0 0 min(240px, 70vw);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .ab-timeline-item:hover {
  transform: translateY(-4px);
  border-color: rgba(198, 255, 0, 0.4);
}

.page-about .ab-timeline-year {
  font-family: var(--headline-font);
  font-size: 26px;
  color: var(--flame);
  transform: skewX(-4deg);
  display: block;
}

.page-about .ab-timeline-title {
  color: var(--cloud);
  font-weight: 700;
  font-size: 15px;
  margin: 12px 0 6px;
}

.page-about .ab-timeline-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-muted);
}

.page-about .ab-milestone-figure,
.page-about .ab-taxonomy-figure {
  margin: 0;
}

.page-about .ab-milestone-img,
.page-about .ab-taxonomy-img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  display: block;
}

.page-about .ab-milestone-figure figcaption,
.page-about .ab-taxonomy-figure figcaption {
  font-size: 13px;
  color: var(--ab-faint);
  text-align: center;
  margin-top: 10px;
  line-height: 1.6;
}

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

.page-about .ab-card-old {
  background: rgba(255, 107, 0, 0.1);
  border: 1px solid rgba(255, 107, 0, 0.3);
}

.page-about .ab-card-new {
  background: rgba(198, 255, 0, 0.08);
  border: 1px solid rgba(198, 255, 0, 0.3);
}

.page-about .ab-compare h3 {
  font-family: var(--headline-font);
  font-size: 20px;
  margin-bottom: 12px;
}

.page-about .ab-card-old h3 {
  color: var(--flame);
}

.page-about .ab-card-new h3 {
  color: var(--volt);
}

.page-about .ab-compare ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .ab-compare li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ab-muted);
}

.page-about .ab-compare li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.65em;
  width: 8px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

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

.page-about .ab-axis-card {
  background: var(--cloud);
  color: var(--charcoal);
  border-radius: var(--radius-md);
  padding: 22px;
  position: relative;
  overflow: hidden;
}

.page-about .ab-axis-card::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 64px;
  height: 64px;
  background: var(--volt);
  opacity: 0.15;
  transform: rotate(12deg) skewX(-8deg);
  border-radius: 8px;
}

.page-about .ab-axis-icon {
  font-family: var(--headline-font);
  font-size: 26px;
  color: var(--flame);
  transform: skewX(-6deg);
  display: block;
  margin-bottom: 10px;
}

.page-about .ab-axis-card h3 {
  font-family: var(--headline-font);
  font-size: 19px;
  margin-bottom: 8px;
}

.page-about .ab-axis-card p {
  font-size: 14px;
  line-height: 1.7;
}

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

.page-about .ab-vision-grid .ab-card {
  position: relative;
}

.page-about .ab-vision-grid h3 {
  font-family: var(--headline-font);
  font-size: 19px;
  color: var(--cloud);
  margin: 12px 0 8px;
}

.page-about .ab-vision-grid p {
  color: var(--ab-muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .ab-vision-footer {
  background: var(--midnight);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  display: grid;
  gap: 18px;
}

.page-about .ab-vision-footer p {
  color: var(--ab-muted);
  line-height: 1.8;
  font-size: 15px;
}

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

@media (min-width: 760px) {
  .page-about .ab-hero {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 48px;
    padding-top: 52px;
    padding-bottom: 56px;
  }

  .page-about .ab-hero-img {
    height: 440px;
  }

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

  .page-about .ab-meta-item:first-child {
    grid-column: auto;
  }

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

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

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

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

  .page-about .ab-vision-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    padding-top: 24px;
    padding-bottom: 80px;
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--header-h) + 36px);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    height: fit-content;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-index-label {
    display: block;
    font-size: 12px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--steel);
    margin-bottom: 14px;
  }

  .page-about .ab-index-link {
    border: 0;
    border-left: 3px solid var(--ab-line);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: transparent;
    padding: 12px 18px;
    gap: 10px;
  }

  .page-about .ab-index-link:hover {
    background: var(--glass);
    border-left-color: var(--volt);
    color: var(--cloud);
  }

  .page-about .ab-index-link:hover .ab-index-num {
    color: var(--volt);
  }

  .page-about .ab-index-cta {
    display: grid;
    gap: 10px;
    margin-top: 28px;
    padding: 20px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
  }

  .page-about .ab-index-cta-text {
    font-size: 14px;
    color: var(--ab-muted);
    line-height: 1.5;
  }

  .page-about .ab-section {
    padding: 52px 0 64px;
  }

  .page-about .ab-section-head {
    grid-template-columns: 88px 1fr;
    gap: 24px;
    margin-bottom: 34px;
  }

  .page-about .ab-section-num {
    font-size: 76px;
  }

  .page-about .ab-lead-text {
    font-size: 17px;
  }

  .page-about .ab-timeline-item {
    flex-basis: 270px;
    padding: 24px;
  }

  .page-about .ab-hero-img {
    height: 520px;
  }
}