.page-about {
  --about-border-w: 3px;
  --about-shadow: 6px 6px 0 rgba(43, 43, 43, 0.16);
}

.page-about .about-hero {
  display: grid;
  gap: 20px;
  padding: 28px 0 32px;
  border-bottom: var(--border-w) solid var(--color-border);
}

.page-about .about-hero .page-title {
  margin-bottom: 12px;
}

.page-about .about-hero-aside {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .about-hero-aside .mono-label {
  border: var(--about-border-w) solid var(--color-border);
  background: var(--color-white);
  padding: 6px 10px;
  font-size: 12px;
  box-shadow: var(--shadow-soft);
}

.page-about .about-grid {
  display: grid;
  gap: 24px;
  padding-top: 32px;
  padding-bottom: 36px;
}

.page-about .about-aside .section-kicker {
  margin-bottom: 8px;
}

.page-about .about-aside .section-title {
  margin-bottom: 12px;
}

.page-about .about-aside .note {
  color: var(--color-text-aux);
  font-size: 13px;
  line-height: 1.7;
}

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

.page-about .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .tab-btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  padding: 6px 12px;
  border: var(--about-border-w) solid var(--color-border);
  border-radius: 0;
  background: var(--color-white);
  color: var(--color-text);
  box-shadow: none;
  cursor: pointer;
  transition: box-shadow 0.15s ease;
}

.page-about .tab-btn[data-active="true"] {
  background: var(--color-card-yellow);
  box-shadow: var(--shadow-soft);
}

.page-about .about-table-wrap {
  border: var(--about-border-w) solid var(--color-border);
  background: var(--color-white);
  box-shadow: var(--about-shadow);
}

.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 10px 12px;
  border: 2px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.page-about .about-table th {
  width: 128px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  background: var(--color-bg-warm);
  color: var(--color-text);
}

.page-about .about-table td {
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-table .stat-key {
  color: var(--color-accent-red);
  font-weight: 800;
  font-family: var(--font-mono);
  font-size: 16px;
}

.page-about .about-profile-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .profile-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-text);
  margin: 2px 0 6px;
}

.page-about .about-stats-fig {
  margin: 24px 0 0;
}

.page-about .about-cat-fig {
  margin: 24px 0 0;
}

.page-about .about-batch-fig {
  margin: 24px 0 0;
}

.page-about .img-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--about-border-w) solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.page-about .img-frame figcaption {
  margin-top: 8px;
  font-size: 12px;
}

.page-about .section-teal {
  color: var(--color-white);
}

.page-about .section-teal .section-title {
  color: var(--color-white);
}

.page-about .section-teal .section-kicker {
  color: var(--color-card-yellow);
}

.page-about .section-teal .about-aside .note {
  color: rgba(255, 255, 255, 0.82);
}

.page-about .category-tree {
  display: grid;
  gap: 16px;
}

.page-about .cat-block {
  border: var(--about-border-w) solid var(--color-border);
  box-shadow: var(--about-shadow);
  padding: 16px;
  background: var(--color-white);
}

.page-about .cat-film,
.page-about .cat-life {
  background: var(--color-card-yellow);
}

.page-about .cat-software,
.page-about .cat-audio {
  background: var(--color-card-coral);
}

.page-about .cat-academic,
.page-about .cat-edu {
  background: var(--color-card-mint);
}

.page-about .cat-design {
  background: var(--color-card-blue);
}

.page-about .cat-dev {
  background: var(--color-accent-purple);
  color: var(--color-white);
}

.page-about .cat-block-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}

.page-about .cat-index {
  border: 2px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 2px 6px;
  line-height: 1.4;
}

.page-about .cat-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 2px 6px;
  background: rgba(43, 43, 43, 0.08);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

.page-about .cat-dev .cat-count {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.28);
}

.page-about .cat-subs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .cat-subs li span {
  display: inline-block;
  border: 2px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 10px;
  line-height: 1.4;
}

.page-about .cat-block-single {
  max-width: 560px;
}

.page-about .about-batch-flow {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .batch-track {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .batch-node {
  border: var(--about-border-w) solid var(--color-border);
  background: var(--color-white);
  box-shadow: var(--shadow-soft);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .batch-node .index-number {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  color: var(--color-accent-purple);
}

.page-about .batch-desc {
  font-size: 13px;
  font-weight: 700;
}

.page-about .batch-remark {
  font-size: 12px;
  color: var(--color-text-aux);
  line-height: 1.5;
}

.page-about .batch-summary {
  border: var(--about-border-w) solid var(--color-border);
  background: var(--color-bg-teal);
  color: var(--color-white);
  box-shadow: var(--shadow-hard);
  padding: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.page-about .batch-summary p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 14px;
}

.page-about .batch-summary strong {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--color-card-yellow);
}

.page-about .batch-summary .btn {
  margin-left: auto;
}

.page-about .about-version-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .version-card {
  border: var(--about-border-w) solid var(--color-border);
  background: var(--color-bg-teal);
  color: var(--color-white);
  box-shadow: var(--shadow-hard);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .version-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .version-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  color: var(--color-card-yellow);
  line-height: 1.2;
}

.page-about .version-title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
}

.page-about .version-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.86);
}

.page-about .search-way-row {
  display: grid;
  gap: 16px;
}

.page-about .search-way-card {
  border: var(--about-border-w) solid var(--color-border);
  background: var(--color-white);
  box-shadow: var(--shadow-soft);
  padding: 16px;
}

.page-about .search-way-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: var(--about-border-w) solid var(--color-border);
  border-radius: 50%;
  background: var(--color-card-mint);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 12px;
  box-shadow: var(--shadow-soft);
}

.page-about .search-way-card:nth-child(2) .search-way-icon {
  background: var(--color-card-yellow);
}

.page-about .search-way-card:nth-child(3) .search-way-icon {
  background: var(--color-card-coral);
}

.page-about .search-way-card:nth-child(4) .search-way-icon {
  background: var(--color-card-blue);
}

.page-about .search-way-card:nth-child(5) .search-way-icon {
  background: var(--color-accent-purple);
  color: var(--color-white);
}

.page-about .search-way-card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
}

.page-about .search-way-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-aux);
}

.page-about .about-index-strip {
  margin-top: 24px;
  border: var(--about-border-w) solid var(--color-border);
  background: var(--color-bg-warm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-index-strip .index-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.page-about .about-index-strip .index-key {
  font-family: var(--font-mono);
  font-size: 12px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  padding: 2px 6px;
  line-height: 1.4;
}

.page-about .about-index-strip .index-key.is-current {
  background: var(--color-card-coral);
  color: var(--color-white);
}

.page-about .about-help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

@media (min-width: 768px) {
  .page-about .about-hero {
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 32px;
  }

  .page-about .about-grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 40px;
  }

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

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

  .page-about .about-batch-flow {
    grid-template-columns: minmax(0, 1fr) 240px;
    align-items: start;
  }

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

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

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

  .page-about .about-table th {
    width: 160px;
  }
}

@media (min-width: 1200px) {
  .page-about .batch-track {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .search-way-row {
    gap: 18px;
  }
}