.page-about {
  --about-hero-pad: clamp(36px, 7vw, 88px);
  --about-card-bg: rgba(255, 255, 255, 0.08);
  --about-card-bg-strong: rgba(26, 42, 74, 0.86);
  --about-line-soft: rgba(46, 74, 107, 0.65);
  --about-glow: 0 0 18px rgba(57, 255, 20, 0.35);
  background: var(--color-bg);
  color: var(--color-white);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about .page-about-topbar {
  padding-top: 24px;
}

.page-about .breadcrumbs {
  margin-bottom: 0;
}

.page-about .about-hero {
  position: relative;
  padding: var(--about-hero-pad) 0;
  overflow: hidden;
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.3;
  filter: saturate(0.75) brightness(0.72);
}

.page-about .about-hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: linear-gradient(120deg, transparent, #000 30%, #000 72%, transparent);
  mask-image: linear-gradient(120deg, transparent, #000 30%, #000 72%, transparent);
}

.page-about .about-hero::after {
  content: 'DATA TRACK · 2016 — 2023';
  position: absolute;
  right: 24px;
  bottom: 18px;
  z-index: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(57, 255, 20, 0.32);
  white-space: nowrap;
}

.page-about .about-hero-container {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-about .about-statement {
  background: linear-gradient(150deg, rgba(15, 30, 60, 0.92), rgba(26, 42, 74, 0.76));
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  padding: 30px 28px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.page-about .about-statement .lead {
  margin-top: 16px;
}

.page-about .about-statement-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero-stats {
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-panel);
}

.page-about .about-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.page-about .about-stat-item {
  position: relative;
  background: rgba(15, 30, 60, 0.7);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius);
  padding: 16px 14px 14px;
  cursor: default;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-stat-item:hover,
.page-about .about-stat-item:focus-within {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.page-about .about-stat-num {
  display: block;
  font-size: 42px;
  line-height: 1.08;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.page-about .about-stat-item .metric-label {
  display: block;
  color: var(--color-blue-gray);
  font-size: 13px;
  line-height: 1.5;
}

.page-about .about-stat-pop {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 8px;
  z-index: 6;
  min-width: 168px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: rgba(15, 30, 60, 0.96);
  border: 1px solid var(--color-accent);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-white);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-stat-item:hover .about-stat-pop,
.page-about .about-stat-item:focus-within .about-stat-pop {
  opacity: 1;
  transform: translateY(0);
}

.page-about .about-hero-foot {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-muted);
  text-align: right;
  letter-spacing: 0.02em;
}

.page-about .about-gene {
  position: relative;
  padding: 72px 0 60px;
}

.page-about .about-gene-head {
  max-width: 760px;
}

.page-about .about-gene-grid {
  display: grid;
  gap: 28px;
  margin-top: 32px;
}

.page-about .about-gene-main {
  background: linear-gradient(135deg, rgba(26, 42, 74, 0.7), rgba(26, 42, 74, 0.3));
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
}

.page-about .about-gene-main p {
  color: var(--color-blue-gray);
}

.page-about .about-gene-main p + p {
  margin-top: 14px;
}

.page-about .about-gene-main .tag-list {
  margin-top: 22px;
}

.page-about .about-gene-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
}

.page-about .about-gene-note {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--color-blue-gray);
}

.page-about .about-note-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-orange);
}

.page-about .about-gene-aside {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  overflow: hidden;
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.page-about .about-bg-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(140deg, transparent 22%, rgba(57, 255, 20, 0.08) 22.5%, transparent 23.2%),
    linear-gradient(140deg, transparent 44%, rgba(57, 255, 20, 0.06) 44.5%, transparent 45.2%),
    linear-gradient(140deg, transparent 66%, rgba(57, 255, 20, 0.05) 66.5%, transparent 67.2%);
}

.page-about .about-gene-card {
  position: relative;
  z-index: 1;
  max-width: 340px;
  margin: 20px;
  padding: 28px 24px;
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-about .about-gene-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .about-gene-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  color: var(--color-bg);
  background: var(--color-accent);
  font-size: 13px;
  box-shadow: var(--about-glow);
}

.page-about .about-gene-card-copy {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--color-white);
}

.page-about .about-evolution {
  padding: 60px 0 72px;
  background:
    radial-gradient(ellipse at 90% 12%, rgba(57, 255, 20, 0.08), transparent 44%),
    var(--color-bg-deep);
}

.page-about .about-evo-grid {
  display: grid;
  gap: 18px;
  margin-top: 36px;
}

.page-about .about-evo-card {
  position: relative;
  background: linear-gradient(150deg, rgba(26, 42, 74, 0.9), rgba(26, 42, 74, 0.55));
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 26px 22px 22px;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-evo-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 72px;
  height: 72px;
  background: radial-gradient(circle, rgba(57, 255, 20, 0.14), transparent 70%);
}

.page-about .about-evo-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
}

.page-about .about-evo-layer {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  margin-bottom: 16px;
}

.page-about .about-evo-title {
  font-family: var(--font-title);
  font-size: 20px;
  line-height: 1.3;
  font-weight: 800;
  margin-bottom: 10px;
}

.page-about .about-evo-card p {
  font-size: 15px;
  color: var(--color-blue-gray);
}

.page-about .about-evo-card .data-badge {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 4px 12px;
  background: rgba(15, 30, 60, 0.6);
}

.page-about .about-evo-card .data-badge.alert {
  color: var(--color-orange);
  border-color: rgba(255, 107, 53, 0.45);
}

.page-about .about-evo-link {
  margin-top: 32px;
  text-align: center;
}

.page-about .about-milestones {
  position: relative;
  padding: 72px 0;
  overflow: hidden;
}

.page-about .about-milestones-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-milestones-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  filter: saturate(0.7) brightness(0.7);
}

.page-about .about-milestones .content-shell {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-shell {
  margin-top: 40px;
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-timeline-track {
  position: relative;
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 44px 8px 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline-track::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline-track::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border-radius: 999px;
}

.page-about .about-timeline-track::-webkit-scrollbar-track {
  background: rgba(57, 255, 20, 0.05);
  border-radius: 999px;
}

.page-about .about-timeline-track::before {
  content: '';
  position: absolute;
  top: 22px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-line) 30%, var(--color-line) 70%, var(--color-accent));
  opacity: 0.7;
}

.page-about .about-milestone-item {
  position: relative;
  flex: 0 0 268px;
  scroll-snap-align: start;
  padding-top: 30px;
}

.page-about .about-milestone-node {
  background: var(--about-card-bg-strong);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-milestone-node:hover {
  border-color: rgba(57, 255, 20, 0.6);
}

.page-about .about-milestone-node[open] {
  border-color: var(--color-accent);
  box-shadow: 0 0 22px rgba(57, 255, 20, 0.14);
}

.page-about .about-milestone-summary {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 44px 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-milestone-summary::-webkit-details-marker {
  display: none;
}

.page-about .about-milestone-summary::after {
  content: '+';
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--color-accent);
  transition: transform 0.2s var(--ease);
}

.page-about .about-milestone-node[open] .about-milestone-summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-about .about-dot {
  position: absolute;
  top: -24px;
  left: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow:
    0 0 0 4px var(--color-accent-dim),
    0 0 12px var(--color-accent-glow);
}

.page-about .about-milestone-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-year {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.2;
}

.page-about .about-milestone-title {
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-white);
}

.page-about .about-milestone-content {
  border-top: 1px solid var(--color-line);
  padding: 14px 16px 16px;
  background: rgba(15, 30, 60, 0.55);
}

.page-about .about-milestone-content p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-blue-gray);
  margin: 0;
}

.page-about .about-team {
  padding: 72px 0 64px;
  background:
    radial-gradient(ellipse at 10% 90%, rgba(255, 107, 53, 0.06), transparent 44%),
    var(--color-bg);
}

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

.page-about .about-team-visual .img-frame {
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-panel);
}

.page-about .about-team-visual .img-caption {
  margin-top: 10px;
  color: var(--color-muted);
  font-size: 13px;
  text-align: center;
}

.page-about .about-team-body .section-head {
  margin-bottom: 18px;
}

.page-about .about-team-body > p {
  color: var(--color-blue-gray);
}

.page-about .about-team-list {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-blue-gray);
  font-size: 14px;
}

.page-about .about-team-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-accent);
  white-space: nowrap;
}

.page-about .about-cert-grid {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-cert-grid .evidence-card {
  background: linear-gradient(145deg, rgba(26, 42, 74, 0.9), rgba(26, 42, 74, 0.5));
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0;
}

.page-about .about-cert-grid .evidence-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-orange);
}

.page-about .about-cert-grid .evidence-card p {
  margin: 0;
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
}

.page-about .about-team-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--color-muted);
  border-left: 2px solid var(--color-line);
  padding-left: 14px;
}

.page-about .about-team-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-reading {
  padding: 60px 0 76px;
  background: var(--color-bg-deep);
}

.page-about .about-reading-grid {
  display: grid;
  gap: 12px;
}

.page-about .about-reading-title {
  margin-bottom: 8px;
}

.page-about .about-reading-grid .reading-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 18px 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-white);
  text-decoration: none;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-reading-grid .reading-item:hover {
  border-color: var(--color-accent);
  transform: translateX(6px);
  background: rgba(57, 255, 20, 0.07);
}

.page-about .about-reading-grid .reading-item .section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-about .about-reading-grid .reading-item > span:last-child {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-blue-gray);
}

@media (min-width: 768px) {
  .page-about .about-hero-container {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: stretch;
  }

  .page-about .about-stat-grid {
    gap: 16px;
  }

  .page-about .about-stat-num {
    font-size: 48px;
  }

  .page-about .about-gene-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: stretch;
  }

  .page-about .about-gene-aside {
    min-height: auto;
  }

  .page-about .about-evo-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .page-about .about-team-list {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-about .about-cert-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-reading-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero-container {
    gap: 36px;
  }

  .page-about .about-statement {
    padding: 38px 36px;
  }

  .page-about .about-hero-stats {
    padding: 30px 26px;
  }

  .page-about .about-evo-grid {
    gap: 22px;
  }

  .page-about .about-evo-card {
    padding: 32px 28px 24px;
  }

  .page-about .about-milestone-item {
    flex-basis: 292px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat-pop,
  .page-about .about-evo-card,
  .page-about .about-milestone-node,
  .page-about .about-reading-grid .reading-item {
    transition: none;
  }
}