.page-about {
  --cov-note: #6d5c4b;
  --cov-glow: rgba(233, 196, 106, 0.22);
  --cov-on-brown: #f5ead7;
}

.page-about .cov-hero {
  background: var(--card-bg);
  border-bottom: 2px solid var(--border);
  padding: 24px 0 28px;
}

.page-about .cov-hero .page-title {
  font-family: var(--heading-font);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.2;
  margin: 12px 0 8px;
  color: var(--text-primary);
}

.page-about .cov-hero .page-lede {
  color: var(--text-secondary);
  max-width: 74ch;
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}

.page-about .coverage-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 28px 16px 64px;
  background-image:
    linear-gradient(rgba(62, 42, 30, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(62, 42, 30, 0.028) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-about .coverage-aside-inner {
  background: var(--section-brown);
  color: var(--cov-on-brown);
  padding: 18px 16px;
  border-radius: 4px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

.page-about .coverage-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .coverage-nav a {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--cov-on-brown);
  text-decoration: none;
  font-size: 13px;
  border-radius: 2px;
  transition: background 0.2s ease;
}

.page-about .coverage-nav a:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.6);
}

.page-about .coverage-aside-meta {
  display: none;
}

.page-about .coverage-section {
  margin-bottom: 52px;
  scroll-margin-top: 90px;
}

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

.page-about .coverage-section .section-meta {
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-about .cov-tier-block {
  margin-bottom: 20px;
}

.page-about .spec-table-wrap {
  overflow-x: auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.page-about .spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 560px;
}

.page-about .spec-table th,
.page-about .spec-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.page-about .spec-table thead th {
  background: #ede0cc;
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  white-space: nowrap;
}

.page-about .spec-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .spec-table tbody tr:hover {
  background: rgba(233, 196, 106, 0.2);
}

.page-about .cov-tier-table td {
  font-family: var(--mono-font);
  font-size: 13px;
}

.page-about .cov-tier-lower {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
}

.page-about .cov-tier-lower .cov-type-table {
  min-width: 480px;
}

.page-about .cov-tree-figure {
  margin: 0;
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 4px;
}

.page-about .cov-tree-figure img,
.page-about .cov-year-poster img,
.page-about .cov-device-figure img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .cov-tree-figure figcaption,
.page-about .cov-year-poster figcaption,
.page-about .cov-device-figure figcaption {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 10px;
  line-height: 1.6;
  padding: 0 2px;
}

.page-about .cov-panels {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-about .cov-panels .panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.page-about .cov-panels .panel-head {
  background: transparent;
  border: 0;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: var(--body-font);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.page-about .cov-panels .panel-marker {
  color: var(--accent-orange);
  font-family: var(--mono-font);
  font-size: 18px;
  line-height: 1;
  transition: transform 0.2s ease;
}

.page-about .cov-panels .panel[data-open] .panel-marker {
  transform: rotate(45deg);
}

.page-about .cov-panels .panel-body {
  padding: 0 16px 16px;
  color: var(--text-secondary);
  border-top: 1px dashed var(--border);
  padding-top: 12px;
  font-size: 14px;
  line-height: 1.75;
}

.page-about .coverage-section--year-quarter {
  background: var(--section-brown);
  color: var(--cov-on-brown);
  padding: 28px 20px;
  border-radius: 4px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.page-about .section-head--invert h2 {
  color: #fff;
  margin-bottom: 6px;
}

.page-about .section-head--invert .section-meta {
  color: rgba(255, 255, 255, 0.65);
}

.page-about .cov-year-poster {
  margin: 0 0 24px;
}

.page-about .cov-year-poster figcaption {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .cov-year-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .cov-bar-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 52px;
  align-items: center;
  gap: 12px;
}

.page-about .cov-bar-year {
  font-family: var(--mono-font);
  font-weight: 700;
  font-size: 14px;
  color: #f4c77a;
}

.page-about .cov-bar-track {
  height: 22px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .cov-bar-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #f4a261, #e76f51);
}

.page-about .cov-bar-count {
  font-family: var(--mono-font);
  font-weight: 700;
  font-size: 13px;
  text-align: right;
  color: #fff;
  white-space: nowrap;
}

.page-about .cov-quarter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 32px;
}

.page-about .cov-q-row {
  display: grid;
  grid-template-columns: 48px repeat(4, 1fr);
  gap: 6px;
  align-items: stretch;
}

.page-about .cov-q-year {
  font-family: var(--mono-font);
  font-weight: 700;
  font-size: 14px;
  color: #f4c77a;
  align-self: center;
}

.page-about .cov-q-cell {
  min-height: 48px;
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: var(--mono-font);
  font-weight: 700;
  color: #fff;
  gap: 2px;
}

.page-about .cov-q-num {
  font-size: 15px;
  line-height: 1.1;
}

.page-about .cov-q-label {
  font-size: 11px;
  opacity: 0.72;
  font-weight: 400;
  line-height: 1;
}

.page-about .cov-q-1 {
  background: rgba(244, 162, 97, 0.28);
}

.page-about .cov-q-2 {
  background: rgba(244, 162, 97, 0.5);
}

.page-about .cov-q-3 {
  background: rgba(231, 111, 81, 0.72);
}

.page-about .cov-q-4 {
  background: rgba(230, 57, 70, 0.92);
}

.page-about .cov-section-statement {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  border-left: 3px solid var(--accent-orange);
  padding-left: 14px;
  background: rgba(255, 255, 255, 0.05);
  padding-top: 10px;
  padding-bottom: 10px;
}

.page-about .coverage-section--batches {
  background: var(--card-bg);
  padding: 28px 20px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.page-about .coverage-section--batches .section-head h2 {
  color: var(--text-primary);
}

.page-about .cov-timeline {
  position: relative;
  margin: 8px 0 28px;
  padding-left: 20px;
  border-left: 2px solid var(--border);
}

.page-about .cov-timeline-item {
  position: relative;
  padding: 0 0 22px 20px;
}

.page-about .cov-timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .cov-timeline-node {
  position: absolute;
  left: calc(-20px - 13px);
  top: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--index-bar-bg);
  color: #fff;
  font-family: var(--mono-font);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 4px var(--card-bg);
}

.page-about .cov-timeline-item--current .cov-timeline-node {
  background: var(--accent-orange);
  box-shadow: 0 0 0 4px var(--card-bg), 0 0 0 7px rgba(231, 111, 81, 0.25);
}

.page-about .cov-timeline-body {
  background: #fffaf0;
  padding: 14px 16px;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(62, 42, 30, 0.08);
  border-top: 3px solid var(--border);
}

.page-about .cov-timeline-item--current .cov-timeline-body {
  border-top-color: var(--accent-orange);
}

.page-about .cov-timeline-body h3 {
  font-family: var(--heading-font);
  font-size: 16px;
  margin: 0 0 6px;
  color: var(--text-primary);
}

.page-about .cov-timeline-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 0 0 10px;
}

.page-about .cov-timeline-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.page-about .cov-timeline-count {
  font-family: var(--mono-font);
  color: var(--text-secondary);
}

.page-about .cov-progress-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .cov-progress-item {
  background: #fffaf0;
  padding: 14px;
  border-top: 3px solid var(--accent-orange);
  border-radius: 2px;
  box-shadow: 0 2px 6px rgba(62, 42, 30, 0.06);
}

.page-about .cov-progress-label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.page-about .cov-progress-value {
  display: block;
  font-family: var(--mono-font);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  line-height: 1.3;
}

.page-about .cov-progress-item .metric {
  margin-top: 10px;
  height: 6px;
}

.page-about .coverage-section--quality {
  background: var(--section-red);
  color: #f7efe4;
  padding: 28px 20px;
  border-radius: 4px;
}

.page-about .coverage-section--quality .section-head h2 {
  color: #fff;
}

.page-about .coverage-section--quality .spec-table-wrap {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .coverage-section--quality .spec-table {
  min-width: 420px;
}

.page-about .cov-quality-table th,
.page-about .cov-quality-table td,
.page-about .cov-device-table th,
.page-about .cov-device-table td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: #f7efe4;
  font-size: 14px;
}

.page-about .cov-quality-table thead th,
.page-about .cov-device-table thead th {
  background: rgba(255, 255, 255, 0.09);
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #fff;
}

.page-about .cov-quality-table tbody tr:hover,
.page-about .cov-device-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.1);
}

.page-about .cov-quality-table tbody tr:last-child td,
.page-about .cov-device-table tbody tr:last-child td {
  border-bottom: 0;
}

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

.page-about .cov-qty-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

.page-about .cov-qty-dot--full {
  background: var(--status-complete);
  box-shadow: 0 0 6px rgba(42, 157, 143, 0.6);
}

.page-about .cov-qty-dot--main {
  background: var(--tag-yellow);
}

.page-about .cov-qty-dot--part {
  background: var(--status-new);
}

.page-about .cov-qty-dot--rare {
  background: var(--accent-orange);
}

.page-about .cov-device-figure {
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  padding: 12px;
  border-radius: 4px;
}

.page-about .cov-device-figure figcaption {
  color: rgba(255, 255, 255, 0.68);
}

.page-about .cov-client-note {
  margin-top: 24px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.08);
  border-left: 3px solid var(--accent-orange);
  font-size: 14px;
  line-height: 1.8;
  color: #f7efe4;
}

.page-about .cov-neighbor {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.page-about .cov-neighbor .btn-outline--light {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
  background: transparent;
}

.page-about .cov-neighbor .btn-outline--light:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.8);
}

@media (min-width: 640px) {
  .page-about .coverage-layout {
    padding: 32px 24px 72px;
  }

  .page-about .cov-tier-lower {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  }

  .page-about .cov-quality-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .cov-device-figure {
    grid-column: 1 / -1;
    max-width: 380px;
  }

  .page-about .cov-progress-strip {
    grid-template-columns: 1fr 1fr 1fr 1fr;
  }
}

@media (min-width: 980px) {
  .page-about .coverage-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 36px;
    padding: 36px 24px 80px;
    max-width: calc(var(--container-w) + 48px);
    margin: 0 auto;
  }

  .page-about .coverage-aside-inner {
    position: sticky;
    top: 96px;
    padding: 22px;
  }

  .page-about .coverage-nav ul {
    flex-direction: column;
    gap: 6px;
  }

  .page-about .coverage-nav a {
    display: block;
    padding: 8px 10px;
    font-size: 14px;
  }

  .page-about .coverage-aside-meta {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
    margin: 20px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 14px;
  }

  .page-about .coverage-aside-meta dt {
    font-size: 11px;
    opacity: 0.6;
  }

  .page-about .coverage-aside-meta dd {
    margin: 2px 0 10px;
    font-family: var(--mono-font);
    font-size: 14px;
  }

  .page-about .coverage-section {
    margin-bottom: 64px;
  }

  .page-about .coverage-section--year-quarter,
  .page-about .coverage-section--batches,
  .page-about .coverage-section--quality {
    padding: 36px 32px;
  }

  .page-about .cov-year-poster {
    margin: 0 0 30px;
  }

  .page-about .cov-bar-row {
    grid-template-columns: 56px minmax(0, 1fr) 64px;
    gap: 16px;
  }

  .page-about .cov-q-cell {
    min-height: 52px;
  }

  .page-about .cov-q-num {
    font-size: 16px;
  }
}