.page-about {
  background: var(--bg-ink);
  color: var(--text-light);
  font-family: var(--font-sans);
  line-height: 1.75;
}
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}
.page-about .about-wrap {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 30px clamp(16px, 4vw, 48px) 80px;
}
.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}
.page-about .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  color: var(--accent-lime);
}
.page-about .breadcrumb [aria-current] {
  color: var(--accent-lime);
  font-weight: 700;
}
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-bottom: 12px;
}
.page-about .about-hero__intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.page-about .about-hero__kicker {
  display: inline-block;
  margin-top: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(154, 255, 0, 0.5);
  color: var(--accent-lime);
  background: rgba(154, 255, 0, 0.08);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
}
.page-about .about-hero h1 {
  margin: 16px 0 6px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
  color: var(--text-light);
}
.page-about .about-hero__sub {
  margin: 0 0 14px;
  color: var(--text-dim);
  font-size: 1.05rem;
  font-weight: 700;
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 46em;
  color: var(--text-dim);
  font-size: 1rem;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  background: rgba(240, 233, 216, 0.12);
  color: var(--text-light);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.page-about .btn:hover {
  background: rgba(240, 233, 216, 0.2);
  border-color: var(--accent-lime);
}
.page-about .btn-accent {
  background: var(--accent-lime);
  color: var(--bg-ink);
  border-color: var(--accent-lime);
}
.page-about .btn-accent:hover {
  background: var(--accent-lime);
  color: var(--bg-ink);
  border-color: var(--tag-yellow);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.page-about .about-stat {
  background: rgba(240, 233, 216, 0.08);
  border: 1px solid rgba(154, 255, 0, 0.28);
  border-radius: var(--radius-md);
  padding: 18px 16px;
}
.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--accent-lime);
}
.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.page-about .about-section {
  margin-bottom: clamp(22px, 4vw, 40px);
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--radius-lg);
}
.page-about .about-section--tree {
  background: var(--bg-red);
}
.page-about .about-section--updates {
  background: var(--bg-purple);
}
.page-about .about-section--retrieval {
  background: var(--bg-blue);
}
.page-about .section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-left: 16px;
  border-left: 4px solid var(--accent-lime);
  margin-bottom: 20px;
}
.page-about .section-number {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-lime);
}
.page-about .section-head h2 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 800;
  color: var(--text-light);
}
.page-about .about-section__lead {
  margin: 0 0 26px;
  color: var(--text-dim);
  max-width: 64em;
}
.page-about .score-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 22px;
}
.page-about .score-card {
  background: var(--bg-card);
  color: var(--bg-ink);
  padding: 20px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .score-card--red {
  border-left: 6px solid var(--bg-red);
}
.page-about .score-card--purple {
  border-left: 6px solid var(--bg-purple);
}
.page-about .score-card--blue {
  border-left: 6px solid var(--bg-blue);
}
.page-about .score-card--ink {
  border-left: 6px solid var(--bg-ink);
}
.page-about .score-card__head {
  display: flex;
  align-items: center;
  gap: 14px;
}
.page-about .score-card__icon {
  display: inline-grid;
  place-items: center;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-ink);
  color: var(--accent-lime);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
}
.page-about .score-card h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
}
.page-about .score-card__count {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--bg-ink);
}
.page-about .score-card__desc {
  margin: 0;
  color: #3d3a33;
  font-size: 0.95rem;
}
.page-about .score-card .status-badge {
  align-self: flex-start;
}
.page-about .about-taxonomy {
  background: rgba(10, 31, 26, 0.35);
  border: 1px solid rgba(154, 255, 0, 0.28);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-top: 20px;
}
.page-about .about-taxonomy__intro h3 {
  margin: 0;
  color: var(--accent-lime);
  font-size: 1.2rem;
}
.page-about .about-taxonomy__intro p {
  margin: 8px 0 18px;
  color: var(--text-dim);
}
.page-about .tax-levels {
  display: grid;
  gap: 14px;
}
.page-about .tax-level {
  background: rgba(240, 233, 216, 0.9);
  border-radius: var(--radius-md);
  padding: 16px;
  display: grid;
  gap: 8px;
}
.page-about .tax-level__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.page-about .tax-level__name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--bg-ink);
}
.page-about .tax-level__count {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--tag-orange);
}
.page-about .tax-level__note {
  margin: 0;
  font-size: 0.88rem;
  color: #3d3a33;
}
.page-about .tax-level__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}
.page-about .tax-level__tag {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(10, 31, 26, 0.12);
  color: var(--bg-ink);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}
.page-about .about-tree-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-about .about-tree {
  display: grid;
  gap: 16px;
}
.page-about .about-tree__root {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 18px;
  background: var(--accent-lime);
  color: var(--bg-ink);
  border-radius: var(--radius-md);
  font-weight: 800;
  margin-left: 22px;
}
.page-about .about-tree__root-meta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: nowrap;
}
.page-about .about-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-tree__li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 0;
  align-items: stretch;
}
.page-about .about-tree__li-line {
  position: relative;
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent-lime);
  top: 34px;
}
.page-about .about-tree__li-line::before {
  content: "";
  position: absolute;
  left: 0;
  top: -4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-lime);
  box-shadow: 0 0 0 3px rgba(154, 255, 0, 0.25);
}
.page-about .about-tree__branch {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  color: var(--bg-ink);
  display: grid;
  gap: 10px;
}
.page-about .about-tree__branch-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 1.05rem;
}
.page-about .about-tree__branch-head strong {
  font-weight: 800;
}
.page-about .about-tree__branch-head span {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.1rem;
}
.page-about .about-tree__topics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.page-about .about-tree__topic {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-ink);
  color: var(--text-light);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.page-about .about-tree-figure {
  margin: 0;
  text-align: center;
}
.page-about .about-tree-figure img {
  width: 100%;
  border-radius: var(--radius-md);
}
.page-about .about-tree-figure figcaption {
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 0.88rem;
}
.page-about .map-table {
  margin-top: 28px;
  display: grid;
  border: 2px solid rgba(240, 233, 216, 0.3);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .map-table__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px 8px;
  padding: 12px 16px;
  align-items: center;
  background: rgba(240, 233, 216, 0.92);
  color: var(--bg-ink);
  border-bottom: 1px solid rgba(10, 31, 26, 0.15);
}
.page-about .map-table__row:last-child {
  border-bottom: 0;
}
.page-about .map-table__row--head {
  background: var(--accent-lime);
  color: var(--bg-ink);
  font-weight: 800;
}
.page-about .map-table__row a {
  color: var(--bg-red);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 700;
}
.page-about .update-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 22px;
}
.page-about .update-stat {
  background: rgba(240, 233, 216, 0.1);
  border: 1px solid rgba(154, 255, 0, 0.4);
  border-radius: var(--radius-md);
  padding: 16px;
}
.page-about .update-stat__label {
  display: block;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.page-about .update-stat strong {
  display: block;
  margin-top: 6px;
  color: var(--accent-lime);
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 800;
}
.page-about .version-line {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 22px;
}
.page-about .version-line__item {
  padding: 14px 12px;
  border: 2px solid rgba(240, 233, 216, 0.3);
  border-radius: var(--radius-md);
  text-align: center;
  background: rgba(240, 233, 216, 0.06);
}
.page-about .version-line__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-light);
}
.page-about .version-line__note {
  display: block;
  margin-top: 4px;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.page-about .version-line__item.is-current {
  border-color: var(--accent-lime);
  background: rgba(154, 255, 0, 0.12);
}
.page-about .version-line__item.is-current .version-line__code {
  color: var(--accent-lime);
}
.page-about .batch-card {
  background: var(--bg-card);
  color: var(--bg-ink);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 22px;
}
.page-about .batch-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 14px;
}
.page-about .batch-card__head strong {
  font-family: var(--font-mono);
  color: var(--bg-red);
  font-size: 1.4rem;
}
.page-about .batch-split {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.page-about .batch-split li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: rgba(10, 31, 26, 0.08);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
}
.page-about .batch-split span {
  font-size: 0.9rem;
}
.page-about .batch-split strong {
  font-family: var(--font-mono);
  font-size: 1.15rem;
}
.page-about .about-timeline-figure {
  margin: 0;
}
.page-about .about-timeline-figure img {
  width: 100%;
  border-radius: var(--radius-md);
}
.page-about .about-timeline-figure figcaption {
  margin-top: 8px;
  color: var(--text-dim);
  font-size: 0.88rem;
}
.page-about .search-paths {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 22px;
}
.page-about .search-path-card {
  background: var(--bg-card);
  color: var(--bg-ink);
  border-radius: var(--radius-md);
  padding: 20px;
  display: grid;
  gap: 10px;
}
.page-about .search-path-card__icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-blue);
  color: var(--accent-lime);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
}
.page-about .search-path-card h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 800;
}
.page-about .search-path-card p {
  margin: 0;
  color: #3d3a33;
  font-size: 0.93rem;
}
.page-about .access-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 22px;
}
.page-about .access-card {
  background: rgba(240, 233, 216, 0.12);
  border: 1px solid rgba(154, 255, 0, 0.3);
  border-radius: var(--radius-md);
  padding: 20px;
}
.page-about .access-card__tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--accent-lime);
  color: var(--bg-ink);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.page-about .access-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--text-light);
}
.page-about .access-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.page-about .about-visual-card {
  margin: 0;
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
  background: rgba(10, 31, 26, 0.25);
  border-radius: var(--radius-md);
  padding: 20px;
}
.page-about .about-visual-card img {
  width: 100%;
  max-width: 300px;
  border-radius: var(--radius-md);
}
.page-about .about-visual-card figcaption {
  color: var(--text-dim);
  font-size: 0.9rem;
}
.page-about .about-close {
  margin-top: 8px;
  padding: clamp(28px, 5vw, 56px);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(10, 31, 26, 0.92), rgba(26, 43, 74, 0.6)), repeating-linear-gradient(-45deg, rgba(154, 255, 0, 0.06) 0 12px, transparent 12px 24px);
  border: 1px solid rgba(154, 255, 0, 0.3);
  text-align: center;
}
.page-about .about-close h2 {
  margin: 0 0 10px;
  color: var(--text-light);
  font-size: clamp(1.5rem, 3vw, 1.9rem);
}
.page-about .about-close p {
  margin: 0 auto 22px;
  color: var(--text-dim);
  max-width: 40em;
}
.page-about .about-close__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
@media (min-width: 760px) {
  .page-about .score-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .tax-levels {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .map-table__row {
    grid-template-columns: 1fr 1fr 1.6fr;
  }
  .page-about .batch-split {
    grid-template-columns: repeat(4, 1fr);
  }
}
@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    padding-bottom: 0;
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .update-stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .access-row {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-visual-card {
    grid-template-columns: 300px 1fr;
    align-items: center;
    justify-items: start;
    text-align: left;
    gap: 24px;
  }
}
@media (min-width: 960px) {
  .page-about .about-tree-layout {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}
@media (min-width: 980px) {
  .page-about .search-paths {
    grid-template-columns: repeat(4, 1fr);
  }
}
@media (min-width: 1080px) {
  .page-about .score-cards {
    grid-template-columns: repeat(4, 1fr);
  }
}
@media (prefers-reduced-motion: reduce) {
  .page-about .btn,
  .page-about .btn-accent {
    transition: none;
  }
}