.page-about {
  --about-line: rgba(201, 214, 232, 0.14);
  --about-line-strong: rgba(0, 229, 255, 0.28);
  --about-glow: 0 24px 60px -40px rgba(0, 229, 255, 0.55);
  display: block;
  padding-bottom: 72px;
}

.page-about .breadcrumb {
  margin-top: 24px;
}

.page-about .about-block {
  padding: 56px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero {
  position: relative;
  margin-top: 8px;
  padding: 32px 0 52px;
  background-image:
    linear-gradient(to right, rgba(0, 229, 255, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 229, 255, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: -1px -1px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--c-snow);
  margin: 8px 0 0;
  max-width: 22ch;
}

.page-about .about-lead {
  margin: 20px 0 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-steel);
}

.page-about .about-quick {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-quick li {
  background: var(--c-panel);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .q-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 6vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.01em;
}

.page-about .q-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-steel);
}

.page-about .section-head {
  margin-bottom: 28px;
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 5.2vw, 38px);
  line-height: 1.15;
  color: var(--c-snow);
  margin: 6px 0 0;
}

.page-about .section-sub {
  margin: 14px 0 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-steel);
}

.page-about .sub-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--c-snow);
  margin: 0 0 14px;
}

.page-about .about-inline-link {
  margin: 28px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-steel);
}

.page-about .about-inline-link a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line-strong);
}

/* ---------- 演进时间线 ---------- */

.page-about .about-evo-figure {
  margin: 0 0 36px;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 18px;
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--about-line-strong) transparent;
}

.page-about .timeline::-webkit-scrollbar {
  height: 4px;
}

.page-about .timeline::-webkit-scrollbar-thumb {
  background: var(--about-line-strong);
  border-radius: 999px;
}

.page-about .tl-item {
  position: relative;
  flex: 0 0 232px;
  scroll-snap-align: start;
  padding: 30px 16px 20px;
  background: var(--c-panel);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 16px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--c-cyan);
  background: var(--c-void);
}

.page-about .tl-item::after {
  content: "";
  position: absolute;
  top: 17px;
  left: 30px;
  right: 16px;
  height: 1px;
  background: linear-gradient(to right, var(--about-line-strong), transparent);
}

.page-about .tl-item:hover,
.page-about .tl-item:focus-within {
  border-color: var(--about-line-strong);
  box-shadow: var(--about-glow);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-about .tl-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.25;
  color: var(--c-snow);
  margin: 8px 0 8px;
}

.page-about .tl-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-steel);
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-coverage-grid {
  align-items: start;
  gap: 32px;
}

.page-about .cover-matrix {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 8px;
  padding: 20px;
  background: var(--c-panel);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
}

.page-about .cover-matrix span {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: var(--c-steel);
  opacity: 0.22;
}

.page-about .cover-matrix span:nth-child(3n) {
  background: var(--c-cyan);
  opacity: 0.45;
}

.page-about .cover-matrix span:nth-child(5n) {
  background: var(--c-cyan);
  opacity: 0.72;
}

.page-about .cover-matrix span:nth-child(7n) {
  background: var(--c-lime);
  opacity: 0.95;
}

.page-about .cover-caption {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--c-steel);
}

.page-about .metric-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .metric-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .m-key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-snow);
  flex: 0 0 auto;
  min-width: 96px;
}

.page-about .m-val {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-steel);
}

.page-about .coverage-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-steel);
}

.page-about .about-cta {
  margin-top: 22px;
}

/* ---------- 数据节点 ---------- */

.page-about .about-node-grid {
  align-items: start;
  gap: 32px;
}

.page-about .node-figure {
  margin: 0;
}

.page-about .node-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .node-facts li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.page-about .f-line {
  flex: 0 0 2px;
  align-self: stretch;
  min-height: 34px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--c-cyan), var(--c-lime));
}

.page-about .f-body {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-steel);
}

.page-about .f-body strong {
  display: block;
  color: var(--c-snow);
  font-weight: 700;
  margin-bottom: 2px;
}

/* ---------- 团队 ---------- */

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

.page-about .team-card {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--c-panel);
  border: 1px solid var(--about-line);
  border-left-width: 3px;
  border-radius: var(--radius);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
}

.page-about .team-card--cyan {
  border-left-color: var(--c-cyan);
}

.page-about .team-card--lime {
  border-left-color: var(--c-lime);
}

.page-about .team-card--orange {
  border-left-color: var(--c-orange);
}

.page-about .team-card .index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-steel);
}

.page-about .team-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--c-snow);
  margin: 6px 0 10px;
}

.page-about .team-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-steel);
}

/* ---------- 合作与资质 ---------- */

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

.page-about .trust-panel {
  padding: 24px 20px;
  background: var(--glass);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
}

.page-about .trust-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-steel);
}

.page-about .trust-text a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line-strong);
}

/* ---------- 结尾 ---------- */

.page-about .about-closing {
  margin-top: 12px;
  padding: 40px 20px;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 12% 20%, rgba(0, 229, 255, 0.14), transparent 58%),
    radial-gradient(circle at 92% 84%, rgba(182, 255, 59, 0.1), transparent 52%),
    var(--c-panel);
}

.page-about .closing-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.2;
  color: var(--c-snow);
  margin: 0;
}

.page-about .closing-text {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-steel);
}

.page-about .closing-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .closing-actions .btn {
  flex: 1 1 auto;
  text-align: center;
  min-width: 150px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-quick {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .cover-matrix {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 10px;
    padding: 24px;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .trust-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-closing {
    padding: 52px 40px;
  }

  .page-about .closing-actions .btn {
    flex: 0 0 auto;
    min-width: 168px;
  }
}

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-block {
    padding: 76px 0;
  }

  .page-about .about-hero {
    padding: 44px 0 72px;
    background-size: 96px 96px;
  }

  .page-about .about-hero h1 {
    max-width: 24ch;
  }

  .page-about .about-lead {
    font-size: 17px;
    max-width: 42ch;
  }

  .page-about .section-head {
    margin-bottom: 40px;
  }

  .page-about .about-coverage-grid,
  .page-about .about-node-grid {
    gap: 56px;
  }

  .page-about .timeline {
    gap: 22px;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-about .tl-item {
    flex: 1 1 0;
    min-width: 0;
  }

  .page-about .about-closing {
    padding: 64px 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item,
  .page-about .team-card {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-within {
    transform: none;
  }
}
<<<END>>>