.page-about {
  --page-bg: #141414;
  background-color: var(--page-bg);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
}

.page-about .about-shell {
  width: min(100%, var(--content-max));
  margin-inline: auto;
  padding: var(--gutter);
}

.page-about .about-hero {
  border-bottom: 1px solid #3a3a3a;
  padding-block: 0.75rem 2rem;
}

.page-about .about-crumbs {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--accent-silver);
  letter-spacing: 0.08em;
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.page-about .about-crumbs a {
  color: var(--accent-gold);
  text-decoration: none;
}

.page-about .about-crumbs a:hover {
  color: var(--accent-yellow);
  text-shadow: 0 0 8px var(--shadow-glow-yellow);
}

.page-about .crumb-sep {
  color: var(--text-sub);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.25rem;
}

.page-about .about-intro h1 {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 700;
  color: var(--accent-yellow);
  text-shadow: 0 0 16px rgba(242, 209, 11, 0.25);
  margin: 0 0 0.75rem;
  line-height: 1.1;
}

.page-about .about-lead {
  color: var(--text-sub);
  max-width: 48em;
  margin: 0;
}

.page-about .about-snapshot {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid #3a3a3a;
  background: #191919;
}

.page-about .snap-cell {
  padding: 1rem 0.75rem;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.page-about .snap-cell + .snap-cell {
  border-left: 1px solid #3a3a3a;
}

.page-about .snap-val {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-green);
}

.page-about .snap-cell-batch .snap-val {
  color: var(--accent-yellow);
}

.page-about .snap-cell-cycle .snap-val {
  color: var(--accent-pink);
}

.page-about .snap-unit {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--text-sub);
}

.page-about .snap-label {
  font-size: var(--fs-meta);
  color: var(--text-main);
}

.page-about .about-jump {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 1.5rem 0 2.5rem;
}

.page-about .jump-link {
  border: 1px solid #444;
  padding: 0.7rem 0.9rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 600;
  font-size: var(--fs-body);
  background: #191919;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about .jump-link:hover {
  border-color: var(--accent-yellow);
  color: var(--accent-yellow);
}

.page-about .about-section {
  margin-top: clamp(2rem, 5vw, 3.5rem);
  scroll-margin-top: 1rem;
}

.page-about h2 {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  font-weight: 600;
  margin: 0 0 0.4rem;
  line-height: 1.2;
  color: var(--text-main);
}

.page-about h3 {
  font-size: var(--fs-card);
  margin: 0 0 0.35rem;
  line-height: 1.3;
}

.page-about .about-section-lead {
  color: var(--text-sub);
  margin: 0 0 1.25rem;
  max-width: 60em;
}

.page-about .stats-grid {
  display: grid;
  gap: 1rem;
}

.page-about .stat-card {
  position: relative;
  overflow: hidden;
  padding: 1.25rem;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .stat-card > :not(.stat-texture) {
  position: relative;
  z-index: 1;
}

.page-about .stat-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--scanline);
  pointer-events: none;
  z-index: 1;
}

.page-about .stat-total {
  background-color: var(--bg-theater);
}

.page-about .stat-finished {
  background-color: var(--bg-version);
}

.page-about .stat-version {
  background-color: var(--bg-search);
}

.page-about .stat-texture {
  position: absolute;
  z-index: 0;
  right: 0;
  bottom: 0;
  width: 62%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: grayscale(0.2);
}

.page-about .stat-label {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 0.75rem;
}

.page-about .stat-number-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: auto;
}

.page-about .stat-num {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 3.8rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-yellow);
}

.page-about .stat-finished .stat-num {
  color: var(--accent-green);
}

.page-about .stat-version .stat-num {
  color: var(--accent-gold);
}

.page-about .stat-unit {
  font-family: var(--font-mono);
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--fs-meta);
}

.page-about .stat-def {
  margin: 1rem 0 0;
  font-size: var(--fs-body);
  color: rgba(255, 255, 255, 0.82);
  padding-right: 0.5rem;
}

.page-about .tax-head {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.page-about .tax-head-text {
  min-width: 0;
}

.page-about .tax-decor {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid #333;
  background: #1d1d1d;
}

.page-about .tax-three {
  display: grid;
  gap: 1.25rem;
}

.page-about .tax-column {
  border: 1px solid #3a3a3a;
  padding: 1rem;
  background: #191919;
  min-width: 0;
}

.page-about .tax-column h3 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.6rem;
  margin-bottom: 0.85rem;
  border-bottom: 1px solid #333;
}

.page-about .tax-caption {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--text-sub);
  border: 1px solid #444;
  padding: 0.12rem 0.48rem;
}

.page-about .tax-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.page-about .tax-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  padding: 0.45rem 0.55rem;
  font-size: var(--fs-meta);
  font-weight: 600;
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .tax-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.page-about .tax-count {
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-weight: 400;
}

.page-about .tax-type .tax-item:nth-child(odd) {
  background: var(--bg-card-warm);
  color: #24180e;
}

.page-about .tax-type .tax-item:nth-child(even) {
  background: var(--bg-card-cream);
  color: #332607;
}

.page-about .tax-region .tax-item:nth-child(odd) {
  background: var(--bg-card-cool);
  color: #0a1f3d;
}

.page-about .tax-region .tax-item:nth-child(even) {
  background: #a7b5cc;
  color: #0a1f3d;
}

.page-about .tax-region .tax-item:nth-child(4),
.page-about .tax-region .tax-item:nth-child(7) {
  outline: 2px solid var(--accent-electric);
}

.page-about .tax-era .tax-item:nth-child(odd) {
  background: var(--bg-card-brown);
  color: #f3e0c0;
}

.page-about .tax-era .tax-item:nth-child(even) {
  background: #6b4a3d;
  color: #f3e0c0;
}

.page-about .tax-era .tax-item:nth-child(10) {
  background: var(--accent-gold);
  color: #24180e;
}

.page-about .update-grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .update-main {
  min-width: 0;
}

.page-about .timeline-flow {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.page-about .tl-card {
  border: 1px solid #444;
  background: #1d1d1d;
  padding: 1rem;
  position: relative;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .tl-card:hover {
  border-color: var(--accent-silver);
  transform: translateY(-2px);
}

.page-about .tl-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.page-about .tl-dot {
  width: 9px;
  height: 9px;
  background: var(--accent-green);
  display: inline-block;
  flex: 0 0 auto;
}

.page-about .tl-batch {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.page-about .about-badge-dim {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--text-sub);
  border: 1px solid #444;
  padding: 0.12rem 0.45rem;
  white-space: nowrap;
}

.page-about .tl-card p {
  font-size: var(--fs-body);
  color: var(--text-sub);
  margin: 0 0 0.6rem;
}

.page-about .tl-titles {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.3rem;
}

.page-about .tl-titles li {
  font-size: var(--fs-body);
  color: var(--text-main);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem;
}

.page-about .tl-current {
  background: var(--bg-card-warm);
  border-color: var(--accent-yellow);
}

.page-about .tl-current .tl-batch {
  color: #24180e;
}

.page-about .tl-current p,
.page-about .tl-current .tl-titles li {
  color: #24180e;
}

.page-about .tl-current .badge {
  border-color: #24180e;
}

.page-about .tl-next {
  border-style: dashed;
  background: transparent;
}

.page-about .about-up {
  color: var(--accent-green);
  font-size: var(--fs-meta);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.page-about .about-up::before {
  content: "●";
  font-size: 0.6rem;
  line-height: 1;
}

.page-about .dist-wrap {
  margin-top: 1.75rem;
  border-top: 1px solid #2d2d2d;
  padding-top: 1.25rem;
}

.page-about .dist-hint {
  color: var(--text-sub);
  font-size: var(--fs-meta);
  margin: 0 0 0.9rem;
}

.page-about .dist-list {
  display: grid;
  gap: 0.4rem;
}

.page-about .dist-item {
  display: grid;
  grid-template-columns: 4.2em minmax(0, 1fr) 2em;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--text-main);
}

.page-about .dist-label {
  text-align: right;
  color: var(--text-sub);
}

.page-about .dist-track {
  height: 6px;
  background: #262626;
  position: relative;
}

.page-about .dist-fill {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--accent-green);
}

.page-about .dist-val {
  color: var(--accent-silver);
  text-align: right;
}

.page-about .dist-item:nth-child(1) .dist-fill { width: 18%; background: var(--accent-yellow); }
.page-about .dist-item:nth-child(2) .dist-fill { width: 12%; background: var(--accent-green); }
.page-about .dist-item:nth-child(3) .dist-fill { width: 15%; background: var(--accent-pink); }
.page-about .dist-item:nth-child(4) .dist-fill { width: 10%; background: var(--accent-electric); }
.page-about .dist-item:nth-child(5) .dist-fill { width: 8%; background: var(--status-new); }
.page-about .dist-item:nth-child(6) .dist-fill { width: 7%; background: var(--accent-silver); }
.page-about .dist-item:nth-child(7) .dist-fill { width: 6%; background: var(--bg-card-warm); }
.page-about .dist-item:nth-child(8) .dist-fill { width: 4%; background: var(--accent-yellow); }
.page-about .dist-item:nth-child(9) .dist-fill { width: 6%; background: var(--accent-green); }
.page-about .dist-item:nth-child(10) .dist-fill { width: 5%; background: var(--accent-gold); }
.page-about .dist-item:nth-child(11) .dist-fill { width: 4%; background: var(--accent-pink); }
.page-about .dist-item:nth-child(12) .dist-fill { width: 5%; background: var(--accent-electric); }

.page-about .update-side {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-about .update-illus {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid #333;
  background: #1d1d1d;
}

.page-about .update-side-card {
  border: 1px solid #3a3a3a;
  background: #191919;
  padding: 1rem;
}

.page-about .update-side-card p {
  color: var(--text-sub);
  font-size: var(--fs-body);
  margin: 0 0 0.75rem;
}

.page-about .about-link-inline {
  display: inline-block;
  margin-top: 0.6rem;
  color: var(--accent-yellow);
  font-size: var(--fs-meta);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--accent-yellow);
  padding: 0.25rem 0.55rem;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.page-about .about-link-inline:hover {
  background: var(--accent-yellow);
  color: #141414;
}

.page-about .path-steps {
  display: grid;
  gap: 0.9rem;
}

.page-about .path-step {
  border: 1px solid #3a3a3a;
  background: #1a1a1a;
  padding: 1.2rem;
  position: relative;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .path-step:hover {
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.page-about .step-num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  line-height: 1;
  color: var(--accent-pink);
  margin-bottom: 0.6rem;
  display: block;
}

.page-about .path-step:nth-child(2) .step-num {
  color: var(--accent-electric);
}

.page-about .path-step:nth-child(3) .step-num {
  color: var(--accent-gold);
}

.page-about .path-step:nth-child(4) .step-num {
  color: var(--accent-green);
}

.page-about .path-step h3 {
  margin-bottom: 0.5rem;
}

.page-about .path-step p {
  color: var(--text-sub);
  font-size: var(--fs-body);
  margin: 0;
}

.page-about .about-links {
  border-top: 1px solid #2d2d2d;
  padding-top: 0.5rem;
}

.page-about .link-grid {
  display: grid;
  gap: 0.9rem;
  margin-top: 1rem;
}

.page-about .link-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  border: 1px solid #3a3a3a;
  background: #181818;
  padding: 1.1rem;
  text-decoration: none;
  color: var(--text-main);
  transition: border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.page-about .link-card:hover {
  border-color: var(--accent-yellow);
  background: #202020;
  transform: translateY(-2px);
}

.page-about .link-card-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent-yellow);
}

.page-about .link-card-desc {
  color: var(--text-sub);
  font-size: var(--fs-body);
}

.page-about .link-card-go {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--accent-green);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

@media (min-width: 768px) {
  .page-about .about-jump {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .tax-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .tax-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: end;
  }

  .page-about .tax-type-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .tax-region-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .tax-era-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .timeline-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .path-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 1024px) {
  .page-about .tax-type-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .tax-region-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .tax-era-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .timeline-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .update-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
    align-items: start;
  }

  .page-about .path-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}