.page-about {
  --ab-coral: #FF7F50;
  --ab-seaweed: #2E8B57;
  --ab-sand: #F4A460;
  --ab-coral-red: #FF6B6B;
  --ab-deep: #1E3A5F;
  --ab-cream: #FFF8F0;
  --ab-gold: #FFD700;
  --ab-ink: #2E2E2E;
  --ab-line: #D3D3D3;
  background: var(--ab-cream);
  color: var(--ab-ink);
  line-height: 1.7;
}

/* 首屏横幅 */
.ab-hero {
  position: relative;
  padding: 40px 0 0;
  background: linear-gradient(180deg, #FFF0EB 0%, #FFF8F0 70%);
  border-radius: 0 0 42px 42px;
}
.ab-hero .breadcrumb {
  margin-bottom: 32px;
}
.ab-hero-eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--blush);
  color: var(--coral-red);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.ab-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.15;
  color: var(--deep);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}
.ab-hero-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 44em;
  margin: 0 0 28px;
}
.ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}
.ab-hero-banner {
  display: block;
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 40px 40px 0 0;
}

/* 本站简介 */
.ab-intro {
  padding: 56px 0;
}
.ab-intro-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  background: var(--surface);
  border-radius: 32px;
  padding: 36px 28px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(30, 58, 95, 0.06);
}
.ab-intro-text h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  color: var(--deep);
  margin: 8px 0 16px;
  line-height: 1.25;
}
.ab-intro-text p {
  color: var(--text-soft);
  margin: 0 0 16px;
  line-height: 1.85;
}
.ab-intro-text .btn {
  margin-top: 8px;
}
.ab-intro-art {
  background: linear-gradient(135deg, #FFF0EB 0%, #EAF0E4 100%);
  border-radius: 24px;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.ab-scallop {
  width: 120px;
  height: auto;
  filter: drop-shadow(0 8px 16px rgba(30, 58, 95, 0.15));
}

/* 收录概况 */
.ab-stats {
  padding: 48px 0 64px;
}
.ab-stat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 32px;
}
.ab-stat-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 26px 28px;
  border-top: 6px solid var(--coral);
  box-shadow: 0 4px 20px rgba(30, 58, 95, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ab-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}
.ab-stat-seaweed {
  border-top-color: var(--seaweed);
}
.ab-stat-sand {
  border-top-color: var(--sand);
}
.ab-stat-coral-red {
  border-top-color: var(--coral-red);
}
.ab-stat-deep {
  border-top-color: var(--deep);
}
.ab-stat-gold {
  border-top-color: var(--gold);
}
.ab-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--deep);
  letter-spacing: -0.02em;
}
.ab-stat-unit {
  font-size: 18px;
  margin-left: 2px;
  color: var(--text-soft);
  font-weight: 700;
}
.ab-stat-label {
  display: block;
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
  margin-top: 10px;
}
.ab-stat-note {
  font-size: 13px;
  color: var(--text-soft);
  margin: 6px 0 0;
  transition: color 0.2s ease;
}
.ab-stat-card:hover .ab-stat-note {
  color: var(--deep);
}

/* 分类与标签体系 */
.ab-taxonomy {
  padding: 0;
}
.ab-taxonomy-inner {
  background: var(--tint-seaweed);
  border-radius: 48px;
  padding: 56px 0;
  position: relative;
  overflow: hidden;
}
.ab-taxo-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 36px;
}
.ab-taxo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.ab-taxo-grid .mega-tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 138px;
  border-radius: 24px;
  padding: 22px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(30, 58, 95, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ab-taxo-grid .mega-tile:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lift);
}
.ab-tile-subs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.ab-sub-tag {
  display: inline-block;
  background: rgba(255, 248, 240, 0.62);
  color: var(--deep);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}
.ab-taxo-aside {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.ab-taxo-layer-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 4px 14px rgba(30, 58, 95, 0.06);
}
.ab-taxo-layer-card h3 {
  font-size: 16px;
  color: var(--deep);
  margin: 0 0 14px;
  font-family: var(--font-display);
}
.ab-layer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.ab-layer-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 14px;
  background: var(--tint-seaweed);
  border-radius: 16px;
  font-size: 14px;
  color: var(--text-soft);
}
.ab-layer-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  color: var(--seaweed);
}
.ab-taxo-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 24px;
  box-shadow: 0 4px 14px rgba(30, 58, 95, 0.08);
}
.ab-tag-cloud-wrap {
  margin-top: 40px;
}
.ab-tag-cloud-wrap h3 {
  font-size: 16px;
  color: var(--deep);
  margin: 0 0 16px;
  font-family: var(--font-display);
}
.ab-tag-cloud {
  gap: 10px;
}
.ab-tag-cloud .tag {
  text-decoration: none;
  border-radius: 999px;
  padding: 8px 18px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease;
}
.ab-tag-cloud .tag:hover {
  transform: translateY(-3px);
  background: var(--gold);
}
.ab-tag-cloud .tag-hot {
  font-size: 17px;
  background: var(--gold);
  color: var(--deep);
}
.ab-tag-cloud .tag-mid {
  font-size: 15px;
  background: var(--sand);
  color: #FFFFFF;
}
.ab-tag-cloud .tag-low {
  font-size: 13px;
  background: var(--mint);
  color: var(--deep);
}

/* 更新机制与批次 */
.ab-timeline {
  padding: 64px 0;
}
.ab-timeline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 36px;
}
.ab-timeline-list {
  position: relative;
  padding-left: 32px;
}
.ab-timeline-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 3px;
  background: repeating-linear-gradient(180deg, var(--coral) 0 10px, var(--cream) 10px 18px);
}
.ab-timeline-item {
  position: relative;
  padding-bottom: 24px;
}
.ab-tl-dot {
  position: absolute;
  left: -32px;
  top: 10px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--seaweed);
  border: 4px solid var(--cream);
  box-shadow: 0 0 0 3px var(--seaweed);
}
.ab-timeline-item:nth-child(even) .ab-tl-dot {
  background: var(--coral);
  box-shadow: 0 0 0 3px var(--coral);
}
.ab-tl-card {
  background: var(--surface);
  border-radius: 22px;
  padding: 22px 24px;
  border: 1px solid rgba(30, 58, 95, 0.06);
  box-shadow: 0 4px 14px rgba(30, 58, 95, 0.06);
}
.ab-tl-card .batch-id {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  color: var(--deep);
  background: var(--blush);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.ab-tl-card h3 {
  font-size: 18px;
  color: var(--deep);
  margin: 0 0 6px;
  font-family: var(--font-display);
}
.ab-tl-card p {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0;
  line-height: 1.7;
}
.ab-timeline-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

/* 版本与终端适配 */
.ab-version {
  padding: 0;
}
.ab-version-inner {
  background: var(--tint-sand);
  border-radius: 48px;
  padding: 56px 0;
}
.ab-version-table {
  margin-top: 32px;
}
.ab-version-table th,
.ab-version-table td {
  padding: 14px 18px;
  white-space: nowrap;
}
.ab-version-table thead th {
  background: var(--deep);
  color: #FFF8F0;
  font-size: 15px;
  font-family: var(--font-display);
}
.ab-version-table tbody tr:nth-child(even) {
  background: var(--tint-blush);
}
.ab-version-table tbody tr:hover {
  background: var(--gold);
}
.ab-device-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 28px;
}
.ab-device-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 4px 14px rgba(30, 58, 95, 0.06);
  border-top: 6px solid var(--seaweed);
}
.ab-device-screen {
  border-top-color: var(--coral);
}
.ab-device-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--deep);
  background: var(--blush);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.ab-device-screen .ab-device-tag {
  background: #FFF0EB;
  color: var(--coral-red);
}
.ab-device-card h3 {
  font-size: 20px;
  color: var(--deep);
  margin: 0 0 8px;
  font-family: var(--font-display);
}
.ab-device-card p {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0 0 16px;
  line-height: 1.7;
}

/* 内链区 */
.ab-related {
  padding: 64px 0;
}
.ab-related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.ab-related-card {
  display: block;
  text-decoration: none;
  background: var(--surface);
  border-radius: 24px;
  padding: 28px;
  border: 1px solid rgba(30, 58, 95, 0.06);
  box-shadow: 0 4px 14px rgba(30, 58, 95, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ab-related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}
.ab-related-archive {
  background: var(--tint-seaweed);
}
.ab-related-timeline {
  background: var(--tint-blush);
}
.ab-related-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--coral-red);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.ab-related-card h3 {
  font-size: 22px;
  color: var(--deep);
  margin: 0 0 8px;
  font-family: var(--font-display);
}
.ab-related-card p {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0;
  line-height: 1.7;
}

/* 平板与桌面适配 */
@media (min-width: 768px) {
  .ab-hero {
    padding-top: 56px;
  }
  .ab-hero-actions {
    margin-bottom: 48px;
  }
  .ab-hero-banner {
    height: 240px;
  }
  .ab-intro-card {
    grid-template-columns: 1fr 220px;
    padding: 44px;
    gap: 40px;
  }
  .ab-intro-art {
    min-height: 220px;
  }
  .ab-stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .ab-taxo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .ab-taxo-aside {
    grid-template-columns: 1fr 1fr;
  }
  .ab-taxo-img {
    height: 260px;
  }
  .ab-timeline-layout {
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
  }
  .ab-device-grid {
    grid-template-columns: 1fr 1fr;
  }
  .ab-related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .ab-stat-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .ab-taxo-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1280px) {
  .ab-taxo-layout {
    grid-template-columns: 1fr 300px;
  }
  .ab-taxo-aside {
    grid-template-columns: 1fr;
  }
  .ab-timeline-figure img {
    height: 260px;
  }
}