.page-about {
  --about-line: #D1CCC4;
  --about-soft: #666;
  --about-card-bg: #FFF8EF;
  background: var(--bg-page);
}

/* 面包屑与首屏 */
.page-about .breadcrumb {
  padding-block: 0.75rem;
}
.page-about .about-hero {
  padding-block: 0.5rem 2.25rem;
}
.page-about .about-hero-inner {
  display: grid;
  gap: 1.75rem;
}
.page-about .about-hero-desc {
  margin: 0.8rem 0 1.2rem;
  color: var(--text-sub);
  line-height: 1.8;
}
.page-about .about-hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
}
.page-about .about-hero-note-text {
  font-weight: 600;
  color: var(--text-main);
}

/* 指标卡 */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin: 0;
}
.page-about .about-metric {
  margin: 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-top-width: 4px;
  background: var(--bg-card);
}
.page-about .about-metric--red {
  border-top-color: var(--accent-red);
}
.page-about .about-metric--green {
  border-top-color: var(--status-green);
}
.page-about .about-metric--yellow {
  border-top-color: var(--status-yellow);
}
.page-about .about-metric--purple {
  border-top-color: var(--accent-purple);
}
.page-about .about-metric dt {
  font-size: 0.8rem;
  color: var(--text-sub);
}
.page-about .about-metric-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  line-height: 1.15;
  color: var(--text-main);
}
.page-about .about-metric-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--text-sub);
}

/* 快速入口磁贴 */
.page-about .about-locator {
  padding-block: 2rem;
}
.page-about .about-locator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}
.page-about .about-locator-item {
  display: block;
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  text-decoration: none;
  color: var(--text-main);
}
.page-about .about-locator-item:nth-child(1) {
  background: var(--tag-1);
  border-color: #c7aa82;
}
.page-about .about-locator-item:nth-child(2) {
  background: var(--accent-orange);
  border-color: #b35b12;
  color: #1d1612;
}
.page-about .about-locator-item:nth-child(3) {
  background: var(--tag-3);
  border-color: #9dbcd4;
}
.page-about .about-locator-item:nth-child(4) {
  background: var(--accent-purple);
  border-color: #7d3b96;
  color: #fff;
}
.page-about .about-locator-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  opacity: 0.75;
}
.page-about .about-locator-title {
  display: block;
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 0.3rem;
}
.page-about .about-locator-meta {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.82rem;
  opacity: 0.85;
}

/* 本站定位 */
.page-about .about-positioning {
  padding-block: 2.5rem;
}
.page-about .about-positioning-layout {
  display: grid;
  gap: 1.5rem;
}
.page-about .about-jump {
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  padding-bottom: 0.6rem;
}
.page-about .about-jump-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--status-yellow);
  margin: 0 0 0.4rem;
}
.page-about .about-spy-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-spy-list a {
  display: inline-block;
  padding: 0.28rem 0.4rem;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  font-size: 0.9rem;
}
.page-about .about-spy-list a.is-active {
  color: #fff;
  border-bottom-color: var(--status-yellow);
}
.page-about .about-positioning .section-kicker {
  color: var(--status-yellow);
}
.page-about .about-positioning .section-title {
  color: var(--on-dark);
}
.page-about .about-positioning-cards {
  display: grid;
  gap: 0.9rem;
}
.page-about .about-positioning-card {
  background: var(--bg-card);
  border-left: 4px solid var(--accent-orange);
  padding: 1.1rem 1.2rem;
}
.page-about .about-positioning-card:nth-child(2) {
  border-left-color: var(--status-green);
}
.page-about .about-positioning-card:nth-child(3) {
  border-left-color: var(--accent-purple);
}
.page-about .about-positioning-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-red);
}
.page-about .about-positioning-card p {
  margin: 0.45rem 0 0;
  color: var(--text-sub);
}

/* 收录与组织 */
.page-about .about-collection {
  padding-block: 2.5rem;
}
.page-about .about-section-lead {
  margin: 0.5rem 0 1.6rem;
  color: var(--text-sub);
  max-width: 58rem;
}
.page-about .about-collection .about-section-lead {
  color: var(--on-green);
}
.page-about .about-collection .section-kicker {
  color: var(--status-yellow);
}
.page-about .about-collection .section-title {
  color: var(--on-green);
}
.page-about .about-collection-grid {
  display: grid;
  gap: 1.4rem;
}
.page-about .about-collection .data-table {
  background: rgba(255, 255, 255, 0.07);
  color: var(--on-green);
}
.page-about .about-collection .data-table th,
.page-about .about-collection .data-table td {
  border-color: rgba(255, 255, 255, 0.18);
}
.page-about .about-collection .data-table a {
  color: var(--status-yellow);
  text-underline-offset: 2px;
}

/* 图片 */
.page-about .about-figure {
  margin: 0;
}
.page-about .about-figure img {
  max-width: 100%;
  height: auto;
  display: block;
  margin-inline: auto;
}
.page-about .about-figure figcaption {
  text-align: center;
  font-size: 0.82rem;
  margin-top: 0.55rem;
  color: var(--text-sub);
}
.page-about .about-collection .about-figure figcaption {
  color: rgba(255, 255, 255, 0.75);
}

/* 组织面板 */
.page-about .about-org-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}
.page-about .about-panel {
  background: rgba(255, 255, 255, 0.07);
  border-left: 3px solid var(--accent-orange);
  padding: 1.2rem 1.3rem;
}
.page-about .about-panel:nth-child(2) {
  border-left-color: var(--status-yellow);
}
.page-about .about-panel:nth-child(3) {
  border-left-color: var(--accent-purple);
}
.page-about .about-panel h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-head);
  color: var(--on-green);
}
.page-about .about-panel p {
  color: var(--on-green);
}
.page-about .about-batch-rule {
  margin: 0.5rem 0 0.8rem;
  padding-left: 1.2rem;
  color: var(--on-green);
}
.page-about .about-tag-density {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-tag-density li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.55rem;
  align-items: center;
  margin: 0.5rem 0;
}
.page-about .about-tag-bar {
  height: 0.4rem;
  background: rgba(255, 255, 255, 0.24);
}
.page-about .about-tag-bar i {
  display: block;
  height: 100%;
  background: var(--status-yellow);
}
.page-about .about-tag-density b {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--status-yellow);
}
.page-about .about-version-list {
  list-style: none;
  margin: 0 0 0.8rem;
  padding: 0;
}
.page-about .about-version-list li {
  border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
  padding: 0.6rem 0;
}
.page-about .about-version-list li:last-child {
  border-bottom: none;
}
.page-about .about-version-list p {
  margin: 0.3rem 0 0;
  font-size: 0.85rem;
}

/* 更新机制 */
.page-about .about-update {
  padding-block: 2.5rem;
}
.page-about .about-update-grid {
  display: grid;
  gap: 1.5rem;
}
.page-about .about-update-timeline h3 {
  font-family: var(--font-head);
  margin: 0 0 0.8rem;
}
.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--border);
}
.page-about .about-timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 5rem 1fr auto;
  gap: 0.8rem;
  padding: 0.6rem 0.4rem 0.6rem 1rem;
  border-bottom: 1px dashed var(--border);
}
.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -0.35rem;
  top: 0.95rem;
  width: 0.55rem;
  height: 0.55rem;
  background: var(--accent-orange);
  transform: rotate(45deg);
}
.page-about .about-timeline-item--latest {
  background: var(--bg-card);
}
.page-about .about-timeline-item--latest::before {
  background: var(--accent-red);
}
.page-about .about-timeline-mark {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-sub);
  padding-top: 0.15rem;
}
.page-about .about-timeline-item strong {
  font-size: 0.95rem;
}
.page-about .about-timeline-item > span:last-child {
  color: var(--text-sub);
  font-size: 0.85rem;
}
.page-about .about-timeline-more {
  margin: 1rem 0 0;
  color: var(--text-sub);
  font-size: 0.9rem;
}

/* 常见使用方式 */
.page-about .about-usage {
  padding-block: 2.5rem;
}
.page-about .about-usage-grid {
  display: grid;
  gap: 1rem;
}
.page-about .about-usage-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1.2rem;
}
.page-about .about-usage-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent-red);
}
.page-about .about-usage-card h3 {
  margin: 0.3rem 0 0.45rem;
  font-family: var(--font-head);
}
.page-about .about-usage-card p {
  margin: 0.35rem 0;
  color: var(--text-sub);
}
.page-about .about-usage-link {
  display: inline-block;
  margin-top: 0.45rem;
  color: var(--accent-red);
  font-weight: 600;
  text-underline-offset: 2px;
}
.page-about .about-usage-details {
  margin-top: 0.7rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--border);
}
.page-about .about-usage-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-main);
}
.page-about .about-usage-details p {
  margin: 0.4rem 0 0;
  font-size: 0.85rem;
  line-height: 1.7;
}

/* 响应式布局 */
@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-locator-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-usage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-org-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
  }
  .page-about .about-positioning-layout {
    grid-template-columns: 230px 1fr;
    gap: 2rem;
  }
  .page-about .about-jump {
    position: sticky;
    top: 1.5rem;
    border-bottom: none;
    padding-bottom: 0;
  }
  .page-about .about-spy-list {
    display: block;
  }
  .page-about .about-spy-list li {
    margin: 0.35rem 0;
  }
  .page-about .about-spy-list a {
    display: block;
    border-bottom: none;
    border-left: 2px solid rgba(255, 255, 255, 0.25);
  }
  .page-about .about-positioning-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
  .page-about .about-collection-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-org-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-update-grid {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: start;
  }
  .page-about .about-usage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-about .about-usage-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}