.page-about {
  display: block;
  background: var(--bg-page);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.7;
}

.page-about .section {
  position: relative;
  padding: 3rem 1rem;
  overflow: hidden;
}

.page-about .section::before {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 1;
  color: rgba(255, 255, 255, 0.05);
  pointer-events: none;
  z-index: 0;
}

.page-about .section::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-orange), var(--c-magenta), var(--electric-blue));
  opacity: 0.85;
  z-index: 1;
}

.page-about .about-hero::before {
  content: "01";
}

.page-about .about-stats::before {
  content: "02";
}

.page-about .about-taxonomy::before {
  content: "03";
}

.page-about .about-updates::before {
  content: "04";
}

.page-about .about-searchways::before {
  content: "05";
}

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

.page-about .about-hero {
  background:
    repeating-linear-gradient(135deg, rgba(57, 255, 20, 0.03) 0 2px, transparent 2px 12px),
    var(--bg-deep-green);
}

.page-about .about-stats {
  background:
    repeating-linear-gradient(135deg, rgba(0, 229, 255, 0.025) 0 2px, transparent 2px 12px),
    var(--bg-deep-blue);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-stats::after {
  background: linear-gradient(90deg, var(--electric-blue), var(--c-magenta));
}

.page-about .about-taxonomy {
  background: var(--bg-deep-green);
}

.page-about .about-taxonomy::after {
  background: linear-gradient(90deg, var(--c-green), var(--brand-orange));
}

.page-about .about-updates {
  background:
    repeating-linear-gradient(135deg, rgba(57, 255, 20, 0.025) 0 2px, transparent 2px 12px),
    var(--bg-deep-blue);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-updates::after {
  background: linear-gradient(90deg, var(--c-magenta), var(--brand-orange));
}

.page-about .about-searchways {
  background: var(--bg-deep-green);
}

.page-about .about-searchways::after {
  background: linear-gradient(90deg, var(--electric-blue), var(--c-green));
}

.page-about .breadcrumbs {
  padding: 1rem 1rem 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.page-about .breadcrumbs .breadcrumb-link {
  color: var(--electric-blue);
  text-decoration: none;
}

.page-about .breadcrumbs .breadcrumb-link::after {
  content: "/";
  margin: 0 0.5em;
  color: var(--text-muted);
}

.page-about .breadcrumbs .breadcrumb-current {
  color: var(--text-main);
}

.page-about h1,
.page-about h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-style: italic;
  transform: skewX(-4deg);
  line-height: 1.15;
  margin: 0 0 1rem;
}

.page-about h1 {
  font-size: 2.2em;
  color: var(--text-main);
}

.page-about h2 {
  font-size: 1.8em;
  color: var(--text-main);
}

.page-about h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.page-about .section-label {
  display: inline-block;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 0.3em 0.7em;
  margin-bottom: 1rem;
}

.page-about .seq-a {
  color: var(--neon-green);
  border-color: rgba(57, 255, 20, 0.4);
}

.page-about .seq-b {
  color: var(--electric-blue);
  border-color: rgba(0, 229, 255, 0.4);
}

.page-about .seq-c {
  color: var(--c-magenta);
  border-color: rgba(233, 78, 119, 0.4);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-hero-copy p {
  margin: 0 0 0.9rem;
  color: var(--text-muted);
  max-width: 60ch;
}

.page-about .about-hero-copy .about-lead {
  color: var(--neon-green);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}

.page-about .about-hero-figure {
  margin: 0;
  text-align: center;
}

.page-about .about-hero-figure img {
  width: 100%;
  max-width: 400px;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 0.5rem;
  border: 1px solid var(--line);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.page-about .about-hero-figure figcaption {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.page-about .about-section-intro {
  color: var(--text-muted);
  max-width: 65ch;
  margin: 0 0 1rem;
}

.page-about .stat-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.page-about .stat-card {
  background: var(--bg-card);
  border-radius: 0.5rem;
  padding: 1.25rem 1rem;
  border-top: 4px solid var(--c-blue);
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .stat-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.page-about .stat-card--orange {
  border-top-color: var(--brand-orange);
}

.page-about .stat-card--blue {
  border-top-color: var(--c-blue);
}

.page-about .stat-card--magenta {
  border-top-color: var(--c-magenta);
}

.page-about .stat-card--green {
  border-top-color: var(--c-green);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1;
}

.page-about .stat-card--orange .stat-num {
  color: var(--brand-orange);
}

.page-about .stat-card--blue .stat-num {
  color: var(--electric-blue);
}

.page-about .stat-card--magenta .stat-num {
  color: var(--c-magenta);
}

.page-about .stat-card--green .stat-num {
  color: var(--c-green);
}

.page-about .stat-unit {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 0.2em;
}

.page-about .stat-title {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  color: var(--text-main);
  font-family: var(--font-head);
  font-weight: 700;
}

.page-about .stats-chart-wrap {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .stats-chart-figure {
  margin: 0;
}

.page-about .stats-chart-figure img {
  width: 100%;
  max-width: 600px;
  height: auto;
  aspect-ratio: 3 / 1;
  object-fit: cover;
  border-radius: 0.5rem;
  border: 1px solid var(--line);
}

.page-about .stats-chart-figure figcaption {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.page-about .section-breakdown {
  background: var(--bg-card);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
}

.page-about .breakdown-row {
  display: grid;
  grid-template-columns: 7rem 1fr 3rem;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0;
}

.page-about .breakdown-name {
  font-size: 0.85rem;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .breakdown-bar {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2rem;
  height: 0.5rem;
  overflow: hidden;
}

.page-about .breakdown-fill {
  display: block;
  height: 100%;
  border-radius: 2rem;
  background: linear-gradient(90deg, var(--electric-blue), var(--c-blue));
}

.page-about .breakdown-row:nth-child(even) .breakdown-fill {
  background: linear-gradient(90deg, var(--c-magenta), var(--brand-orange));
}

.page-about .breakdown-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--electric-blue);
  text-align: right;
}

.page-about .taxonomy-layout {
  display: grid;
  gap: 2rem;
  margin-top: 1.5rem;
}

.page-about .taxonomy-tree {
  padding: 1rem 0.5rem 1rem 0;
}

.page-about .taxonomy-root {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .taxonomy-branch {
  position: relative;
  margin: 0;
  padding: 0 0 0.9rem 1.5rem;
}

.page-about .taxonomy-branch::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: rgba(74, 144, 226, 0.3);
}

.page-about .taxonomy-branch:last-child::before {
  height: 1.2rem;
  bottom: auto;
}

.page-about .taxonomy-branch::after {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0.8rem;
  width: 0.9rem;
  height: 2px;
  background: rgba(74, 144, 226, 0.3);
}

.page-about .branch-name {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--text-main);
}

.page-about .branch-count {
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--brand-orange);
  margin-left: 0.4em;
  background: rgba(245, 166, 35, 0.12);
  padding: 0.1em 0.5em;
  border-radius: 2rem;
}

.page-about .branch-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.45rem 0 0;
  padding: 0 0 0 1rem;
  position: relative;
}

.page-about .branch-tags::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.3rem;
  bottom: 0.3rem;
  width: 2px;
  background: rgba(233, 78, 119, 0.4);
}

.page-about .branch-tags li {
  font-size: 0.82rem;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 2rem;
  padding: 0.2rem 0.7rem;
  color: var(--text-muted);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-about .taxonomy-branch:hover .branch-tags li {
  border-color: rgba(233, 78, 119, 0.6);
  color: var(--text-main);
  background: rgba(233, 78, 119, 0.08);
}

.page-about .taxonomy-note {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 4px solid var(--brand-orange);
  border-radius: 0.5rem;
  padding: 1.25rem;
}

.page-about .taxonomy-note h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--electric-blue);
  margin: 0 0 0.4rem;
}

.page-about .taxonomy-note h3 + p {
  margin-top: 0;
}

.page-about .taxonomy-note p {
  margin: 0 0 0.8rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.page-about .taxonomy-note a {
  color: var(--c-blue);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-about .update-layout {
  display: grid;
  gap: 2rem;
  margin-top: 1.5rem;
}

.page-about .update-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .update-step {
  position: relative;
  padding: 0 0 1.4rem 3rem;
}

.page-about .update-step::before {
  content: "";
  position: absolute;
  left: 0.95rem;
  top: 2.2rem;
  bottom: 0;
  width: 2px;
  background: rgba(57, 255, 20, 0.3);
}

.page-about .update-step:last-child::before {
  display: none;
}

.page-about .step-index {
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--neon-green);
  border: 1px solid rgba(57, 255, 20, 0.5);
  border-radius: 50%;
  background: var(--bg-card);
}

.page-about .step-body h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 0.3rem;
  color: var(--text-main);
}

.page-about .step-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.page-about .update-figure {
  margin: 0;
  text-align: center;
}

.page-about .update-figure img {
  width: 100%;
  max-width: 300px;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 0.5rem;
  border: 1px solid var(--line);
}

.page-about .update-figure figcaption {
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.page-about .update-progress {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  background: var(--bg-card);
  border-left: 4px solid var(--neon-green);
  padding: 0.9rem 1rem;
}

.page-about .update-progress p {
  margin: 0;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.page-about .searchway-grid {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .searchway-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 1.25rem;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-about .searchway-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.3);
  border-color: rgba(0, 229, 255, 0.5);
}

.page-about .searchway-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 0.4rem;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.2rem;
  color: #0f1115;
  margin-bottom: 0.8rem;
}

.page-about .searchway-card:nth-child(1) .searchway-icon {
  background: var(--brand-orange);
}

.page-about .searchway-card:nth-child(2) .searchway-icon {
  background: var(--c-magenta);
}

.page-about .searchway-card:nth-child(3) .searchway-icon {
  background: var(--c-green);
}

.page-about .searchway-card h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 0.4rem;
}

.page-about .searchway-card p {
  margin: 0 0 0.9rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.page-about .searchway-footer {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border-left: 4px solid var(--neon-green);
  padding: 0.9rem 1rem;
}

.page-about .searchway-footer a {
  color: var(--neon-green);
  text-decoration: underline;
}

@media (min-width: 768px) {
  .page-about .section {
    padding: 4rem 1rem;
  }

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

  .page-about h1 {
    font-size: 2.4em;
  }

  .page-about .stat-card-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }

  .page-about .stats-chart-wrap {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }

  .page-about .taxonomy-layout {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
  }

  .page-about .update-layout {
    grid-template-columns: 1fr 0.8fr;
    align-items: start;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}