.page-about {
  --about-ink: #1E1E1E;
  --about-card-border: rgba(30, 30, 30, 0.9);
  background: var(--color-bg);
}

.page-about .about-hero {
  padding: 28px 0 44px;
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 111, 0, 0.22), transparent 220px),
    radial-gradient(circle at 8% 78%, rgba(78, 205, 196, 0.16), transparent 240px),
    var(--color-bg-deep);
  border-bottom: 2px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-hero-kicker {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about .about-hero-kicker-text {
  color: var(--color-mint);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
}

.page-about .about-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(27px, 4.6vw, 44px);
  line-height: 1.18;
  color: #FFFFFF;
  letter-spacing: -0.02em;
}

.page-about .about-hero-lede {
  margin: 0 0 24px;
  max-width: 62ch;
  line-height: 1.8;
  color: var(--color-text);
  font-size: 15px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

.page-about .about-stat-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--about-card-border);
  box-shadow: var(--shadow-card);
}

.page-about .about-stat-card--yellow { background: var(--color-yellow); color: var(--color-text-dark); }
.page-about .about-stat-card--coral { background: var(--color-coral); color: var(--color-text-dark); }
.page-about .about-stat-card--mint { background: var(--color-mint); color: var(--color-text-dark); }
.page-about .about-stat-card--lake { background: var(--color-lake); color: var(--color-text-dark); }
.page-about .about-stat-card--green { background: var(--color-green); color: var(--color-text-dark); }
.page-about .about-stat-card--orange { background: var(--color-accent); color: #FFFFFF; }

.page-about .about-stat-card-num {
  font-family: var(--font-head);
  font-size: 30px;
  font-weight: 800;
  line-height: 1.05;
}

.page-about .about-stat-card-label {
  font-size: 13px;
  font-weight: 600;
  opacity: 0.85;
}

.page-about .about-section-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.page-about .section-band {
  padding: 48px 0 56px;
}

.page-about .about-scale-section {
  background: linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg) 100%);
}

.page-about .about-taxonomy-section {
  background: var(--color-bg-alt);
}

.page-about .about-update-section {
  background: var(--color-bg);
}

.page-about .about-feature-section {
  background: var(--color-bg-alt);
}

.page-about .about-scale-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

.page-about .about-scale-table-wrap {
  overflow-x: auto;
  width: 100%;
}

.page-about .about-table-caption {
  text-align: left;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.62);
  padding-bottom: 10px;
  letter-spacing: 0.04em;
}

.page-about .about-scale-table {
  width: 100%;
  min-width: 560px;
  border-collapse: separate;
  border-spacing: 0 6px;
}

.page-about .about-scale-table th,
.page-about .about-scale-table td {
  padding: 14px 16px;
  text-align: left;
  border-radius: var(--radius-xs);
  font-size: 14px;
}

.page-about .about-scale-table thead th {
  color: var(--color-mint);
  background: rgba(78, 205, 196, 0.1);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page-about .about-scale-table tbody th {
  color: #FFFFFF;
  font-weight: 700;
  white-space: nowrap;
}

.page-about .about-scale-table tbody td {
  color: rgba(255, 255, 255, 0.85);
}

.page-about .about-scale-table tbody tr:nth-child(1) > * { background-color: rgba(249, 200, 14, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(2) > * { background-color: rgba(255, 107, 107, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(3) > * { background-color: rgba(78, 205, 196, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(4) > * { background-color: rgba(69, 183, 209, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(5) > * { background-color: rgba(255, 111, 0, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(6) > * { background-color: rgba(0, 200, 83, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(7) > * { background-color: rgba(255, 107, 107, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(8) > * { background-color: rgba(69, 183, 209, 0.12); }
.page-about .about-scale-table tbody tr:nth-child(9) > * { background-color: rgba(78, 205, 196, 0.18); }
.page-about .about-scale-table tbody tr:nth-child(10) > * { background-color: rgba(249, 200, 14, 0.18); }

.page-about .about-scale-table tbody tr:nth-child(1) .metric-fill { width: 12.5%; }
.page-about .about-scale-table tbody tr:nth-child(2) .metric-fill { width: 15.6%; }
.page-about .about-scale-table tbody tr:nth-child(3) .metric-fill { width: 9.4%; }
.page-about .about-scale-table tbody tr:nth-child(4) .metric-fill { width: 18.8%; }
.page-about .about-scale-table tbody tr:nth-child(5) .metric-fill { width: 7.8%; }
.page-about .about-scale-table tbody tr:nth-child(6) .metric-fill { width: 14.1%; }
.page-about .about-scale-table tbody tr:nth-child(7) .metric-fill { width: 7.8%; }
.page-about .about-scale-table tbody tr:nth-child(8) .metric-fill { width: 14.1%; }
.page-about .about-scale-table tbody tr:nth-child(9) .metric-fill,
.page-about .about-scale-table tbody tr:nth-child(10) .metric-fill { width: 100%; }

.page-about .about-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: 1px;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.page-about .about-dot--yellow { background: var(--color-yellow); }
.page-about .about-dot--coral { background: var(--color-coral); }
.page-about .about-dot--mint { background: var(--color-mint); }
.page-about .about-dot--lake { background: var(--color-lake); }
.page-about .about-dot--orange { background: var(--color-accent); }
.page-about .about-dot--green { background: var(--color-green); }

.page-about .about-metric {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 160px;
}

.page-about .about-metric .metric-label {
  min-width: 72px;
  font-weight: 700;
  color: #FFFFFF;
  white-space: nowrap;
}

.page-about .about-metric .metric-track {
  flex: 1 1 90px;
  height: 8px;
  background: rgba(0, 0, 0, 0.28);
  border-radius: 999px;
  overflow: hidden;
}

.page-about .about-metric .metric-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-about .about-scale-chart {
  align-self: center;
  margin: 0;
  padding: 16px;
  background: var(--color-bg-deep);
  border: 2px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.page-about .about-scale-chart img,
.page-about .about-taxonomy-figure img,
.page-about .about-feature-sync-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xs);
}

.page-about .about-scale-chart figcaption,
.page-about .about-taxonomy-figure figcaption,
.page-about .about-feature-sync-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  text-align: center;
}

.page-about .about-scale-guide {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-guide-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.14);
  font-size: 14px;
}

.page-about .about-guide-item--coral { border-left: 6px solid var(--color-coral); }
.page-about .about-guide-item--mint { border-left: 6px solid var(--color-mint); }
.page-about .about-guide-item--lake { border-left: 6px solid var(--color-lake); }

.page-about .about-guide-item-title {
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
}

.page-about .about-taxonomy-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

.page-about .about-taxonomy-figure {
  margin: 0;
  align-self: center;
  padding: 14px;
  background: rgba(0, 0, 0, 0.18);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
}

.page-about .about-tree {
  min-width: 0;
}

.page-about .about-tree-tier {
  background: rgba(0, 0, 0, 0.16);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 20px;
}

.page-about .about-tree-tier-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about .about-tree-tier-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 30px;
  padding: 0 6px;
  border-radius: 8px;
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 800;
}

.page-about .about-tree-tier-head h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: #FFFFFF;
}

.page-about .about-tree-tier-count {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-mint);
  background: rgba(78, 205, 196, 0.14);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.page-about .about-tree-tier-tags,
.page-about .about-tree-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-tree-bridge {
  height: 56px;
  display: flex;
  justify-content: center;
}

.page-about .about-tree-bridge svg {
  height: 100%;
  width: auto;
  min-width: 100px;
}

.page-about .about-tree-line {
  fill: none;
  stroke: rgba(78, 205, 196, 0.75);
  stroke-width: 2;
  stroke-dasharray: 4 3;
  vector-effect: non-scaling-stroke;
}

.page-about .about-tree-hub {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-tree-hub-pill {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(69, 183, 209, 0.2);
  border: 2px solid rgba(69, 183, 209, 0.7);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 14px;
}

.page-about .about-update-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

.page-about .about-update-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-update-step {
  padding: 22px;
  background: var(--color-bg-deep);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.page-about .about-update-step-num {
  display: inline-block;
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.page-about .about-update-step h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  color: #FFFFFF;
}

.page-about .about-update-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-update-panel {
  padding: 22px;
  background: var(--color-bg-deep);
  border: 2px solid rgba(78, 205, 196, 0.6);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.page-about .about-update-panel-head {
  margin-bottom: 20px;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: rgba(255, 255, 255, 0.14);
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 20px 34px;
}

.page-about .about-timeline-marker {
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 3px solid var(--color-bg-deep);
}

.page-about .about-timeline-marker--done {
  background: var(--color-green);
}

.page-about .about-timeline-marker--live {
  background: var(--color-red);
  animation: about-live-pulse 1.8s ease-in-out infinite;
}

@keyframes about-live-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 82, 82, 0.45); }
  50% { box-shadow: 0 0 0 8px rgba(255, 82, 82, 0); }
}

.page-about .about-timeline-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-timeline-content strong {
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-timeline-content span {
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.page-about .about-update-rule {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
  padding: 14px 16px;
  background: rgba(78, 205, 196, 0.12);
  border-radius: var(--radius-sm);
}

.page-about .about-update-rule-key {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-mint);
}

.page-about .about-update-rule-value {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.page-about .about-feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-feature-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border-radius: var(--radius);
  border: 2px solid var(--about-card-border);
  box-shadow: var(--shadow-card);
}

.page-about .about-feature-card--yellow { background: var(--color-yellow); color: var(--color-text-dark); }
.page-about .about-feature-card--mint { background: var(--color-mint); color: var(--color-text-dark); }
.page-about .about-feature-card--lake { background: var(--color-lake); color: var(--color-text-dark); }
.page-about .about-feature-card--coral { background: var(--color-coral); color: var(--color-text-dark); }

.page-about .about-feature-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--about-ink);
  color: #FFFFFF;
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.page-about .about-feature-card h3 {
  margin: 4px 0 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
}

.page-about .about-feature-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  opacity: 0.85;
}

.page-about .about-feature-sync {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: center;
  padding: 24px;
  background: var(--color-bg);
  border: 2px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.page-about .about-feature-sync-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.page-about .about-feature-sync-copy h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.4;
}

.page-about .about-feature-sync-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
}

.page-about .about-feature-sync-figure {
  margin: 0;
  padding: 12px;
  background: rgba(0, 0, 0, 0.18);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
}

.page-about .about-outro {
  padding: 48px 0;
  background: var(--color-yellow);
  color: var(--color-text-dark);
  border-top: 5px solid var(--color-accent);
}

.page-about .about-outro-inner {
  display: flex;
  flex-direction: column;
  gap: 22px;
  align-items: flex-start;
}

.page-about .about-outro-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.page-about .about-outro-copy h2 {
  margin: 0;
  font-size: 30px;
  font-weight: 900;
  line-height: 1.2;
}

.page-about .about-outro-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  max-width: 52ch;
  opacity: 0.9;
}

.page-about .about-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-outro .btn--ghost {
  border-color: rgba(30, 30, 30, 0.6);
  color: var(--color-text-dark);
}

.page-about .about-outro .btn--ghost:hover,
.page-about .about-outro .btn--ghost:focus-visible {
  border-color: var(--color-text-dark);
  background: var(--color-text-dark);
  color: var(--color-yellow);
}

@media (min-width: 640px) {
  .page-about .about-hero-panel {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

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

  .page-about .about-feature-sync {
    grid-template-columns: 1fr 260px;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

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

  .page-about .about-scale-layout {
    grid-template-columns: 1fr 360px;
    gap: 32px;
  }

  .page-about .about-taxonomy-layout {
    grid-template-columns: 340px 1fr;
    gap: 40px;
  }

  .page-about .about-update-layout {
    grid-template-columns: 1fr 400px;
    gap: 32px;
  }

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

  .page-about .about-feature-sync {
    grid-template-columns: 1fr 300px;
    gap: 32px;
  }

  .page-about .about-outro-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}