.page-about {
  --about-bar-h: 14px;
  --about-tree-line: rgba(20, 33, 61, 0.2);
  --about-navy-text: rgba(255, 255, 255, 0.88);
  --about-navy-sub: rgba(255, 255, 255, 0.68);
  --about-chip-bg: var(--yellow);
  --about-chip-border: var(--navy);
}

.page-about .breadcrumbs {
  margin-bottom: 0;
}

.page-about .about-head {
  padding: 32px 4vw 40px;
  max-width: 1440px;
  margin: 0 auto;
  border-bottom: 2px solid var(--border);
}

.page-about .about-head h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.7rem, 4.2vw, 2.9rem);
  line-height: 1.18;
  color: var(--navy);
  margin: 8px 0 14px;
  letter-spacing: -0.01em;
}

.page-about .about-lead {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-light);
  max-width: 980px;
  margin: 0;
}

.page-about .about-lead strong {
  color: var(--navy);
  font-weight: 700;
}

/* 色带 */
.page-about .band-seg {
  display: flex;
  width: 100%;
  height: 8px;
}

.page-about .band-seg span {
  flex: 1;
}

.page-about .about-overview {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 28px;
}

.page-about .about-overview-main p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-main);
  margin: 0 0 14px;
}

.page-about .about-overview-fig {
  margin: 0;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-cream);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-overview-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-overview-fig figcaption {
  display: block;
  padding: 10px 14px;
  font-size: 0.8rem;
  font-family: var(--font-body);
  color: var(--text-light);
  border-top: 1px solid var(--border);
}

/* 记录规模条 */
.page-about .about-bars {
  margin: 28px 0 6px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 9px;
}

.page-about .about-bar-row {
  display: grid;
  grid-template-columns: 4.2rem 1fr 3.4rem;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 0.82rem;
}

.page-about .about-bar-name {
  color: var(--text-main);
  font-weight: 700;
  white-space: nowrap;
}

.page-about .about-bar-track {
  display: block;
  height: var(--about-bar-h);
  border-radius: 999px;
  background: rgba(20, 33, 61, 0.08);
  border: 1px solid rgba(20, 33, 61, 0.12);
  overflow: hidden;
}

.page-about .about-bar-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--orange), var(--yellow));
}

.page-about .about-bar-num {
  text-align: right;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
}

/* 磁贴墙 */
.page-about .about-tile-grid {
  margin-top: 36px;
  grid-template-columns: repeat(2, 1fr);
}

.page-about .about-tile-grid .tile--wide {
  grid-column: span 2;
}

/* 区块 02 */
.page-about .about-tax {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 28px;
}

.page-about .about-tax-fig {
  margin: 0;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-warm);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-tax-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-tax-fig figcaption {
  display: block;
  padding: 10px 14px;
  font-size: 0.8rem;
  font-family: var(--font-body);
  color: var(--text-light);
  border-top: 1px solid var(--border);
}

/* 分类树 */
.page-about .about-tax-tree {
  border: 2px solid var(--navy);
  border-radius: var(--radius);
  background: var(--bg-cream);
  box-shadow: var(--shadow-hard);
  padding: 22px 18px 20px;
  position: relative;
}

.page-about .tax-row {
  position: relative;
  border-left: 3px solid var(--about-tree-line);
  padding-left: 18px;
  margin-left: 8px;
  padding-bottom: 14px;
}

.page-about .tax-row::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--orange);
  border: 2px solid var(--navy);
}

.page-about .tax-row:last-child {
  padding-bottom: 0;
}

.page-about .tax-root {
  border-left-color: var(--navy);
  background: var(--navy);
  border-radius: 8px;
  padding: 14px 16px;
  margin-left: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 12px;
}

.page-about .tax-root::before {
  display: none;
}

.page-about .tax-root .tax-node-name {
  color: var(--bg-cream);
  font-family: var(--font-head);
  font-weight: 900;
}

.page-about .tax-root .tax-node-meta {
  color: var(--yellow);
}

.page-about .tax-node-name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-main);
}

.page-about .tax-node-meta {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--text-light);
  white-space: nowrap;
}

.page-about .tax-level {
  margin-top: 18px;
}

.page-about .tax-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: 26px;
  margin-bottom: 4px;
}

.page-about .about-tax-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--navy);
  background: var(--about-chip-bg);
  border: 2px solid var(--about-chip-border);
  border-radius: 6px;
  padding: 4px 9px;
  transition: background 0.18s ease, transform 0.18s ease;
}

.page-about .about-tax-chip:hover {
  background: var(--teal);
  color: var(--navy);
  transform: translateY(-2px);
}

.page-about .about-tax-chip b {
  font-family: var(--font-data);
}

.page-about .tax-leaf-row {
  padding-left: 26px;
  background: rgba(46, 196, 182, 0.08);
  border-radius: 0 8px 8px 0;
}

/* 标签墙 */
.page-about .about-tagplate {
  margin-top: 36px;
  border-top: 2px solid var(--border);
  padding-top: 22px;
}

.page-about .about-subhead {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--navy);
  margin: 0 0 16px;
}

.page-about .about-tag-group {
  gap: 10px;
}

/* 区块 03 深蓝区 */
.page-about .section-block--navy {
  color: var(--about-navy-text);
}

.page-about .section-block--navy .section-number {
  color: rgba(255, 255, 255, 0.36);
}

.page-about .section-block--navy .section-sub {
  color: var(--about-navy-sub);
}

.page-about .about-update-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 28px;
}

.page-about .update-list {
  position: relative;
  border-left: 2px solid rgba(255, 255, 255, 0.2);
  padding-left: 22px;
  display: grid;
  gap: 16px;
}

.page-about .update-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 14px;
  align-items: start;
}

.page-about .update-dot {
  position: absolute;
  left: -31px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--yellow);
  border: 3px solid var(--navy);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.55);
}

.page-about .update-body h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--bg-cream);
  margin: 0 0 4px;
}

.page-about .update-body p {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--about-navy-sub);
  margin: 0;
}

.page-about .update-item .status-badge {
  justify-self: end;
}

.page-about .about-update-fig {
  margin: 0;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.14);
}

.page-about .about-update-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 区块 04 */
.page-about .about-path-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 28px;
}

.page-about .about-path-steps {
  display: grid;
  gap: 14px;
}

.page-about .about-path-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--bg-cream);
  box-shadow: 2px 2px 0 rgba(20, 33, 61, 0.1);
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}

.page-about .about-path-step:hover {
  box-shadow: var(--shadow-hard);
  transform: translateY(-2px);
}

.page-about .about-step-no {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--orange);
  color: var(--navy);
  font-weight: 900;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--navy);
}

.page-about .about-step-body h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--navy);
  margin: 0 0 6px;
}

.page-about .about-step-body p {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-light);
  margin: 0 0 8px;
}

/* 界面示意 */
.page-about .about-ui {
  border: 2px solid var(--navy);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-hard);
  background: var(--bg-cream);
  align-self: start;
}

.page-about .ui-window {
  overflow: hidden;
}

.page-about .ui-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--navy);
  color: var(--bg-cream);
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
}

.page-about .ui-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--magenta);
  border: 1px solid var(--bg-cream);
}

.page-about .ui-title {
  flex: 1;
}

.page-about .ui-badge {
  font-family: var(--font-data);
  font-size: 0.7rem;
  background: var(--yellow);
  color: var(--navy);
  border-radius: 4px;
  padding: 2px 7px;
  font-weight: 700;
}

.page-about .ui-body {
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .ui-sidebar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 14px;
  border-bottom: 2px solid var(--border);
  background: var(--bg-warm);
}

.page-about .ui-side-label {
  font-family: var(--font-body);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--navy);
  background: var(--bg-cream);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 9px;
}

.page-about .ui-main {
  padding: 14px;
}

.page-about .ui-filter {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 14px;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--border);
}

.page-about .ui-filter-label {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-main);
}

.page-about .ui-chip {
  font-family: var(--font-data);
  font-size: 0.76rem;
  color: var(--navy);
  background: var(--teal);
  border-radius: 999px;
  padding: 3px 10px;
  justify-self: start;
  border: 1px solid var(--navy);
}

.page-about .ui-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding-top: 14px;
}

.page-about .ui-stat {
  background: var(--bg-warm);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ui-stat-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--text-light);
}

.page-about .ui-stat strong {
  font-family: var(--font-data);
  font-size: 1.15rem;
  color: var(--navy);
  font-weight: 800;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-about .about-tile-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-tile-grid .tile--wide {
    grid-column: span 2;
  }

  .page-about .ui-body {
    grid-template-columns: 4.5rem 1fr;
  }

  .page-about .ui-sidebar {
    flex-direction: column;
    border-bottom: none;
    border-right: 2px solid var(--border);
  }

  .page-about .ui-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-head,
  .page-about .section-block--warm,
  .page-about .section-block--cream {
    padding-left: 4vw;
    padding-right: 4vw;
  }

  .page-about .about-overview {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .page-about .about-tile-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-tile-grid .tile--wide {
    grid-column: span 2;
  }

  .page-about .about-tax {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .about-update-layout {
    grid-template-columns: 1.5fr 0.5fr;
    align-items: start;
  }

  .page-about .about-path-layout {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

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

@media (min-width: 1280px) {
  .page-about .about-head,
  .page-about .section-block--warm,
  .page-about .section-block--cream {
    padding-left: calc((100vw - 1200px) / 2);
    padding-right: calc((100vw - 1200px) / 2);
  }

  .page-about .about-bars {
    grid-template-columns: 1fr 1fr;
    column-gap: 24px;
  }

  .page-about .about-tile-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}