.page-about {
  --about-hero-bg: linear-gradient(135deg, var(--accent-deep) 0%, var(--accent) 72%, #7A3C8C 100%);
  --about-scope-bg: #FDF3F6;
  --about-updates-bg: #EDF6EF;
  --about-guide-bg: #EFE7F7;
  --about-dark-gold: #9A8200;
  --about-sun-ink: #6B5A00;
  padding: 0 0 48px;
}

.page-about .container {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 16px;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 16px 0 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.page-about .breadcrumb__link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  text-decoration: underline;
}

.page-about .breadcrumb__sep {
  color: #A080C0;
}

.page-about .about-hero {
  position: relative;
  background: var(--about-hero-bg);
  border-radius: var(--radius-notch);
  padding: 30px 20px 34px;
  margin-bottom: 36px;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: 20px;
  top: 18px;
  width: 64px;
  height: 64px;
  background: radial-gradient(circle, rgba(255,255,255,.22) 2px, transparent 3px);
  background-size: 14px 14px;
  border-radius: 12px;
  opacity: .7;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -50px;
  width: 180px;
  height: 180px;
  border: 2px dashed rgba(255,255,255,.22);
  border-radius: 50%;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero h1 {
  margin: 0 0 14px;
  font-size: 25px;
  line-height: 1.32;
  font-weight: 900;
  letter-spacing: .5px;
  max-width: 920px;
}

.page-about .about-hero__lead {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.8;
  opacity: .92;
  max-width: 760px;
}

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

.page-about .about-hero__tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.3);
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
}

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

.page-about .about-sec-head .section-title {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.4;
}

.page-about .about-sec-head .section-title__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px 2px 8px 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  flex: none;
}

.page-about .about-sec-head__desc {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

.page-about .cat-tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .cat-tile {
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  padding: 18px 14px 16px;
  color: #fff;
  text-decoration: none;
  min-height: 104px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .cat-tile:hover,
.page-about .cat-tile:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.page-about .cat-tile--berry { background: var(--berry); }
.page-about .cat-tile--melon { background: var(--melon); }
.page-about .cat-tile--sun { background: var(--sun); color: #2F2F2F; }
.page-about .cat-tile--cherry { background: var(--cherry); }
.page-about .cat-tile--durian { background: var(--durian); }

.page-about .cat-tile__name {
  display: block;
  font-weight: 900;
  font-size: 15px;
  margin-bottom: 8px;
}

.page-about .cat-tile__count {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
}

.page-about .cat-tile__note {
  display: block;
  font-size: 11px;
  opacity: .9;
  margin-top: 8px;
  font-weight: 400;
  letter-spacing: .5px;
}

.page-about .latest-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-bottom: 20px;
  padding: 12px 14px;
  background: #fff;
  border-radius: 10px;
  border: 1px dashed rgba(75,0,130,.25);
  font-size: 13px;
}

.page-about .latest-strip__label {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
  margin-right: 2px;
}

.page-about .latest-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-about .latest-strip__item--berry { background: var(--tag-berry); color: #8E1E49; }
.page-about .latest-strip__item--melon { background: var(--tag-melon); color: #1D6B3C; }
.page-about .latest-strip__item--sun { background: var(--tag-sun); color: var(--about-sun-ink); }
.page-about .latest-strip__item--cherry { background: var(--tag-cherry); color: #8E1E49; }
.page-about .latest-strip__item--durian { background: var(--tag-durian); color: #7A4A00; }

.page-about .cat-tree {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.page-about .cat-tree__img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .13;
}

.page-about .cat-tree__inner {
  position: relative;
  background: rgba(255,255,255,.78);
  border-radius: 14px;
  padding: 8px 4px;
  overflow-x: auto;
}

.page-about .data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
  font-size: 14px;
  line-height: 1.5;
}

.page-about .data-table th,
.page-about .data-table td {
  padding: 10px 14px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--border-color);
}

.page-about .data-table thead th {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .5px;
  white-space: nowrap;
}

.page-about .data-table tbody tr:nth-child(even) td {
  background: rgba(255,255,255,.6);
}

.page-about .data-table tbody tr:hover td {
  background: var(--accent-soft);
}

.page-about .data-table tfoot td {
  background: var(--accent-soft);
  font-weight: 800;
  color: var(--accent);
}

.page-about .data-table tbody tr:nth-child(1) td:first-child,
.page-about .data-table tfoot td:first-child {
  color: var(--berry);
  font-weight: 700;
}

.page-about .data-table tbody tr:nth-child(2) td:first-child {
  color: var(--melon);
  font-weight: 700;
}

.page-about .data-table tbody tr:nth-child(3) td:first-child {
  color: var(--about-dark-gold);
  font-weight: 700;
}

.page-about .data-table tbody tr:nth-child(4) td:first-child {
  color: var(--cherry);
  font-weight: 700;
}

.page-about .data-table tbody tr:nth-child(5) td:first-child {
  color: #B25E00;
  font-weight: 700;
}

.page-about .cat-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.page-about .cat-dot--berry { background: var(--berry); box-shadow: 0 0 0 3px var(--tag-berry); }
.page-about .cat-dot--melon { background: var(--melon); box-shadow: 0 0 0 3px var(--tag-melon); }
.page-about .cat-dot--sun { background: var(--sun); box-shadow: 0 0 0 3px var(--tag-sun); }
.page-about .cat-dot--cherry { background: var(--cherry); box-shadow: 0 0 0 3px var(--tag-cherry); }
.page-about .cat-dot--durian { background: var(--durian); box-shadow: 0 0 0 3px var(--tag-durian); }

.page-about .about-scope {
  background: var(--about-scope-bg);
  border-radius: 14px;
  padding: 26px 16px;
  margin: 8px 0 28px;
}

.page-about .scope-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .scope-list__item {
  display: flex;
  gap: 14px;
  background: var(--card-bg);
  border-radius: 10px;
  padding: 16px 14px;
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow-sm);
}

.page-about .scope-list__icon {
  flex: none;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 10px 2px 10px 2px;
  font-size: 14px;
  font-weight: 700;
}

.page-about .scope-list__item h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 800;
}

.page-about .scope-list__item p {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

.page-about .about-updates {
  background: var(--about-updates-bg);
  border-radius: 14px;
  padding: 26px 16px;
  margin: 0 0 28px;
}

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

.page-about .about-updates__img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  max-height: 240px;
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

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

.page-about .update-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 4px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--status-new) 0%, var(--status-updating) 60%, var(--accent) 100%);
  opacity: .45;
}

.page-about .update-timeline__item {
  position: relative;
  padding: 0 0 22px 36px;
}

.page-about .update-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .update-timeline__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--status-new);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--status-new);
}

.page-about .update-timeline__item:nth-child(2)::before {
  background: var(--status-updating);
  box-shadow: 0 0 0 2px var(--status-updating);
}

.page-about .update-timeline__item:nth-child(3)::before {
  background: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.page-about .update-timeline__badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: var(--status-new);
  color: #fff;
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
  margin-bottom: 8px;
}

.page-about .update-timeline__item:nth-child(2) .update-timeline__badge {
  background: var(--status-updating);
}

.page-about .update-timeline__item:nth-child(3) .update-timeline__badge {
  background: var(--accent);
}

.page-about .update-timeline__item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
}

.page-about .update-timeline__item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-main);
}

.page-about .about-versions {
  margin: 0 0 28px;
}

.page-about .version-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .version-table-wrap {
  overflow-x: auto;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  padding: 8px;
  box-shadow: var(--shadow-sm);
}

.page-about .version-table-wrap tr:last-child td {
  background: var(--accent-soft);
  font-weight: 700;
}

.page-about .version-table-wrap tr:last-child td:first-child {
  border-radius: 8px 0 0 8px;
}

.page-about .version-table-wrap tr:last-child td:last-child {
  border-radius: 0 8px 8px 0;
}

.page-about .version-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .version-side__img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  max-height: 220px;
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

.page-about .device-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .device-list__item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.6;
  box-shadow: var(--shadow-sm);
}

.page-about .device-list__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.page-about .about-guide {
  background: var(--about-guide-bg);
  border-radius: 14px;
  padding: 26px 16px;
}

.page-about .step-list {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  counter-reset: step;
}

.page-about .step-list__item {
  display: flex;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px dashed rgba(75,0,130,.2);
}

.page-about .step-list__item:last-child {
  border-bottom: none;
}

.page-about .step-list__num {
  flex: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
}

.page-about .step-list__item h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 800;
}

.page-about .step-list__item p {
  margin: 0;
  font-size: 13px;
  color: var(--text-main);
  line-height: 1.7;
}

.page-about .guide-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .guide-links__item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card-bg);
  border-radius: 10px;
  padding: 13px 16px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid rgba(75,0,130,.15);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .guide-links__item:hover,
.page-about .guide-links__item:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.page-about .guide-links__arrow {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--berry);
}

@media (min-width: 700px) {
  .page-about .container {
    padding: 0 24px;
  }

  .page-about .about-hero {
    padding: 42px 40px 44px;
  }

  .page-about .about-hero h1 {
    font-size: 32px;
  }

  .page-about .about-hero__lead {
    font-size: 15px;
  }

  .page-about .cat-tiles {
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
  }

  .page-about .cat-tile {
    padding: 22px 16px 18px;
    min-height: 130px;
  }

  .page-about .cat-tile__name {
    font-size: 16px;
  }

  .page-about .cat-tile__count {
    font-size: 28px;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-sec-head .section-title {
    font-size: 24px;
  }

  .page-about .about-updates__layout {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: stretch;
  }

  .page-about .about-updates__img {
    max-height: none;
    align-self: stretch;
  }

  .page-about .version-wrap {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-about .about-scope,
  .page-about .about-updates,
  .page-about .about-guide {
    padding: 32px 28px;
  }
}