.page-about {
  --about-ink: #1A0A1E;
  --about-muted: #6B4E74;
  --about-card-bg: #ffffff;
  --about-soft: #F5F2EE;
  --about-cream: #FFF7E6;
  --about-line: #2A0A33;
  --about-line-2: #4A0E0E;
  font-family: var(--font-body);
}

.page-about .badge {
  display: inline-block;
  border-radius: var(--radius-pill);
  padding: 2px 10px;
  font-size: 0.75rem;
  line-height: 1.6;
  text-decoration: none;
}

.page-about .badge-updating {
  background: var(--c-amber);
  color: var(--c-ink);
  font-weight: 700;
}

.page-about .badge-new {
  background: var(--c-pink);
  color: var(--c-ink);
  font-weight: 700;
}

.page-about .badge-version {
  background: var(--c-pink);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-shadow: 0 0 12px rgba(255, 75, 140, 0.55);
}

.page-about .about-hero {
  background: linear-gradient(135deg, var(--c-dark-1), var(--c-dark-2));
  color: var(--c-light-text);
  padding: 30px 0 44px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  color: rgba(255, 242, 229, 0.7);
  font-size: var(--text-small);
  margin-bottom: 18px;
}

.page-about .breadcrumb a {
  color: var(--c-blue);
  text-decoration: none;
}

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

.page-about .about-hero-topline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 16px;
  align-items: center;
}

.page-about .hero-update-chip {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  background: rgba(255, 242, 229, 0.1);
  border: 1px solid rgba(0, 208, 255, 0.35);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  color: var(--c-light-text);
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: 1.85rem;
  line-height: 1.3;
  margin: 0 0 14px;
  text-shadow: 0 0 18px rgba(255, 106, 0, 0.5), 0 0 38px rgba(0, 208, 255, 0.25);
  max-width: 780px;
}

.page-about .about-hero .page-lead {
  max-width: 720px;
  color: rgba(255, 242, 229, 0.86);
  font-size: var(--text-body);
  line-height: 1.8;
  margin: 0;
}

.page-about .hero-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .quick-chip {
  background: rgba(0, 208, 255, 0.14);
  border: 1px solid rgba(0, 208, 255, 0.4);
  color: var(--c-light-text);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: var(--text-small);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .quick-chip:hover {
  background: rgba(0, 208, 255, 0.32);
  color: #ffffff;
}

.page-about .section-head {
  margin-bottom: 26px;
}

.page-about .section-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--c-orange);
  margin: 0 0 4px;
}

.page-about .section-head h2 {
  font-family: var(--font-head);
  font-size: 1.7rem;
  line-height: 1.25;
  color: var(--c-ink);
  margin: 0 0 6px;
}

.page-about .section-desc {
  color: var(--about-muted);
  font-size: var(--text-small);
  line-height: 1.5;
  margin: 0;
}

.page-about .about-scope {
  background: var(--c-light);
  padding: 44px 0;
}

.page-about .scope-grid {
  display: grid;
  gap: 26px;
}

.page-about .scope-stats {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .metric-card {
  background: var(--about-card-bg);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 2px solid transparent;
  box-shadow: 0 8px 24px rgba(42, 10, 51, 0.08);
  position: relative;
}

.page-about .metric-card::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: 10px;
  left: 12px;
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--c-light-text);
  background: var(--about-ink);
  border-radius: 8px;
  padding: 8px 10px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 2;
}

.page-about .metric-card:hover::after {
  opacity: 1;
  transform: translateY(0);
}

.page-about .metric-total {
  border-color: var(--c-orange);
}

.page-about .metric-total::after {
  content: "覆盖 12 个分区，合计 128,640 条";
}

.page-about .metric-cat {
  border-color: var(--c-teal);
}

.page-about .metric-cat::after {
  content: "华语、日韩、欧美、动画、漫画等";
}

.page-about .metric-sub {
  border-color: var(--c-yellow);
}

.page-about .metric-sub::after {
  content: "每个分区下设 5—9 个子类";
}

.page-about .metric-tag {
  border-color: var(--c-blue);
}

.page-about .metric-tag::after {
  content: "按高、中、低频三级标注热度";
}

.page-about .metric-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.page-about .metric-num {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--c-ink);
  display: block;
}

.page-about .metric-label {
  display: block;
  color: var(--about-muted);
  font-size: var(--text-small);
  margin-top: 4px;
}

.page-about .scope-visual {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .bar-chart {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 18px;
  display: grid;
  gap: 7px;
  box-shadow: 0 8px 24px rgba(42, 10, 51, 0.08);
}

.page-about .bar-row {
  display: grid;
  grid-template-columns: 76px 1fr 58px;
  align-items: center;
  gap: 8px;
}

.page-about .bar-label {
  font-size: 0.78rem;
  color: var(--about-muted);
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .bar-track {
  background: rgba(42, 10, 51, 0.08);
  border-radius: var(--radius-pill);
  height: 11px;
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  border-radius: var(--radius-pill);
}

.page-about .bar-w1 { width: 14.65%; background: var(--c-orange); }
.page-about .bar-w2 { width: 19.37%; background: var(--c-yellow); }
.page-about .bar-w3 { width: 16.60%; background: var(--c-teal); }
.page-about .bar-w4 { width: 12.19%; background: var(--c-tag-blue); }
.page-about .bar-w5 { width: 7.65%; background: var(--c-tag-purple); }
.page-about .bar-w6 { width: 5.60%; background: var(--c-pink); }
.page-about .bar-w7 { width: 4.98%; background: var(--c-green); }
.page-about .bar-w8 { width: 3.73%; background: var(--c-amber); }
.page-about .bar-w9 { width: 5.22%; background: var(--c-blue); }
.page-about .bar-w10 { width: 3.23%; background: var(--c-tag-red); }
.page-about .bar-w11 { width: 4.48%; background: var(--c-orange); }
.page-about .bar-w12 { width: 2.30%; background: var(--c-tag-green); }

.page-about .bar-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-ink);
  text-align: right;
}

.page-about .scope-pie {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
  box-shadow: 0 8px 24px rgba(42, 10, 51, 0.08);
}

.page-about .scope-more {
  margin: 0;
  text-align: right;
}

.page-about .scope-more a,
.page-about .taxo-link a,
.page-about .update-link a {
  color: var(--c-link-dark);
  font-size: var(--text-small);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .about-taxo {
  background: linear-gradient(135deg, var(--c-dark-1) 0%, var(--c-dark-2) 100%);
  padding: 44px 0;
  color: var(--c-light-text);
}

.page-about .about-taxo .section-head h2 {
  color: var(--c-light-text);
}

.page-about .about-taxo .section-desc {
  color: rgba(255, 242, 229, 0.72);
}

.page-about .about-taxo .section-kicker {
  color: var(--c-yellow);
}

.page-about .taxo-grid {
  display: grid;
  gap: 24px;
}

.page-about .taxo-tree {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(0, 208, 255, 0.28);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.page-about .tree-root {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--c-yellow);
  background: rgba(255, 195, 0, 0.08);
  border-left: 4px solid var(--c-yellow);
  border-radius: 4px;
  padding: 10px 14px;
  margin-bottom: 16px;
}

.page-about .tree-branch {
  margin: 0 0 16px 12px;
  padding-left: 18px;
  border-left: 1.5px dashed rgba(255, 242, 229, 0.3);
  position: relative;
}

.page-about .tree-branch:last-child {
  margin-bottom: 0;
}

.page-about .tree-l1 {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 106, 0, 0.16);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: var(--c-light-text);
  font-weight: 700;
  font-size: 0.95rem;
  flex-wrap: wrap;
}

.page-about .branch-count {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--c-blue);
  background: rgba(0, 208, 255, 0.13);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.page-about .branch-name {
  color: var(--c-light-text);
}

.page-about .tree-children {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 8px 14px;
}

.page-about .tree-l2 {
  font-size: 0.82rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 242, 229, 0.14);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  color: rgba(255, 242, 229, 0.86);
}

.page-about .tree-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-left: 14px;
}

.page-about .tree-tag {
  font-size: 0.78rem;
  background: rgba(0, 208, 255, 0.15);
  border: 1px solid rgba(0, 208, 255, 0.32);
  color: var(--c-blue);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  font-family: var(--font-mono);
}

.page-about .taxo-visual {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .taxo-visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
}

.page-about .taxo-note {
  background: rgba(255, 242, 229, 0.08);
  border-left: 3px solid var(--c-teal);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  color: rgba(255, 242, 229, 0.8);
  font-size: var(--text-small);
  line-height: 1.7;
  margin: 0;
}

.page-about .taxo-link {
  margin: 0;
  text-align: right;
}

.page-about .about-update {
  background: var(--about-cream);
  padding: 44px 0;
}

.page-about .update-grid {
  display: grid;
  gap: 24px;
}

.page-about .update-timeline {
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(42, 10, 51, 0.08);
  padding: 20px;
  display: grid;
  gap: 14px;
}

.page-about .timeline-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  background: var(--c-light);
  border-left: 4px solid var(--c-orange);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.page-about .timeline-item:nth-child(2) {
  border-left-color: var(--c-amber);
}

.page-about .timeline-item:nth-child(3) {
  border-left-color: var(--c-pink);
}

.page-about .tl-day {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--c-ink);
  min-width: 40px;
}

.page-about .tl-time {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--about-muted);
}

.page-about .tl-batch {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  background: rgba(42, 10, 51, 0.07);
  padding: 3px 8px;
  border-radius: 6px;
  color: var(--c-ink);
}

.page-about .tl-count {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--c-ink);
}

.page-about .timeline-item .badge {
  font-size: 0.7rem;
  padding: 2px 8px;
}

.page-about .timeline-rule {
  font-size: var(--text-small);
  color: var(--about-muted);
  line-height: 1.6;
  margin: 2px 0 0;
  padding: 10px 12px;
  background: rgba(255, 195, 0, 0.14);
  border-radius: var(--radius-md);
}

.page-about .update-figure {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .update-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
}

.page-about .update-link {
  margin: 0;
  text-align: right;
}

.page-about .about-version {
  background: linear-gradient(160deg, var(--c-dark-2) 0%, var(--c-dark-1) 100%);
  padding: 44px 0;
  color: var(--c-light-text);
}

.page-about .about-version .section-head h2 {
  color: var(--c-light-text);
}

.page-about .about-version .section-desc {
  color: rgba(255, 242, 229, 0.72);
}

.page-about .about-version .section-kicker {
  color: var(--c-pink);
}

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

.page-about .version-history,
.page-about .terminal-access {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(0, 208, 255, 0.28);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.page-about .version-history h3,
.page-about .terminal-access h3 {
  font-family: var(--font-head);
  font-size: var(--text-h3);
  color: var(--c-yellow);
  margin: 0 0 16px;
}

.page-about .version-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
}

.page-about .version-step {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 242, 229, 0.12);
}

.page-about .version-step:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .version-step:first-child {
  padding-top: 0;
}

.page-about .ver-num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--c-blue);
  font-size: var(--text-small);
}

.page-about .version-step p {
  color: rgba(255, 242, 229, 0.82);
  font-size: var(--text-small);
  line-height: 1.6;
  margin: 0;
}

.page-about .terminal-list {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  display: grid;
  gap: 10px;
}

.page-about .terminal-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 6px 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  align-items: center;
}

.page-about .term-icon {
  font-weight: 700;
  font-size: 0.82rem;
  text-align: center;
  background: var(--term-color, var(--c-pink));
  color: var(--c-ink);
  border-radius: var(--radius-pill);
  padding: 4px 8px;
}

.page-about .term-android {
  --term-color: var(--c-green);
}

.page-about .term-ios {
  --term-color: var(--c-blue);
}

.page-about .term-tv {
  --term-color: var(--c-orange);
}

.page-about .term-desktop {
  --term-color: var(--c-yellow);
}

.page-about .term-path {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--c-light-text);
  background: rgba(42, 10, 51, 0.4);
  padding: 3px 8px;
  border-radius: 6px;
  justify-self: start;
}

.page-about .term-path a {
  color: var(--c-blue);
  text-decoration: none;
}

.page-about .term-desc {
  grid-column: 1 / -1;
  font-size: var(--text-small);
  color: rgba(255, 242, 229, 0.76);
  line-height: 1.5;
}

.page-about .term-figure {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
  margin-top: 4px;
}

.page-about .version-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-about .version-tools .btn {
  display: inline-block;
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  font-size: var(--text-small);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .version-tools .btn-ghost {
  background: transparent;
  border: 1px solid var(--c-blue);
  color: var(--c-blue);
}

.page-about .version-tools .btn-ghost:hover {
  background: rgba(0, 208, 255, 0.2);
}

.page-about .version-tools .btn-primary {
  background: var(--c-orange);
  border: 1px solid var(--c-orange);
  color: var(--c-ink);
  font-weight: 700;
}

.page-about .version-tools .btn-primary:hover {
  background: #ff8126;
}

.page-about .about-legal {
  background: var(--c-light);
  padding: 44px 0;
}

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

.page-about .legal-card {
  display: block;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 2px solid transparent;
  box-shadow: 0 8px 24px rgba(42, 10, 51, 0.08);
  color: var(--c-ink);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .legal-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(42, 10, 51, 0.14);
}

.page-about .legal-card:first-child {
  border-color: var(--c-blue);
}

.page-about .legal-card:last-child {
  border-color: var(--c-teal);
}

.page-about .legal-card-tag {
  display: inline-block;
  background: var(--c-yellow);
  color: var(--c-ink);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 700;
}

.page-about .legal-card h3 {
  font-family: var(--font-head);
  font-size: var(--text-h3);
  margin: 12px 0 6px;
  color: var(--c-ink);
}

.page-about .legal-card p {
  color: var(--about-muted);
  font-size: var(--text-small);
  margin: 0;
  line-height: 1.6;
}

@media (min-width: 720px) {
  .page-about .about-hero h1 {
    font-size: 2.2rem;
  }

  .page-about .legal-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero {
    padding: 40px 0 56px;
  }

  .page-about .about-hero h1 {
    font-size: var(--text-h1);
  }

  .page-about .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 30px;
  }

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

  .page-about .section-head h2 {
    font-size: var(--text-h2);
  }

  .page-about .section-desc {
    text-align: right;
    max-width: 360px;
  }

  .page-about .scope-grid {
    grid-template-columns: 0.9fr 1.4fr;
    gap: 28px;
    align-items: start;
  }

  .page-about .taxo-grid {
    grid-template-columns: 1.3fr 1fr;
    gap: 28px;
    align-items: start;
  }

  .page-about .update-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: 28px;
    align-items: center;
  }

  .page-about .timeline-item {
    display: grid;
    grid-template-columns: 52px 1fr 92px 68px auto;
    align-items: center;
  }

  .page-about .version-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 28px;
    align-items: start;
  }

  .page-about .metric-num {
    font-size: 2.1rem;
  }

  .page-about .bar-chart {
    padding: 22px;
  }
}

@media (min-width: 1400px) {
  .page-about .scope-grid {
    grid-template-columns: 0.8fr 1.5fr;
  }

  .page-about .taxo-grid {
    grid-template-columns: 1.4fr 0.9fr;
  }
}