.page-about {
  --about-cut: 10px;
  --about-pad: clamp(16px, 4vw, 24px);
}

.page-about .about-crumb-wrap {
  padding-top: 20px;
}

.page-about .section {
  padding-block: clamp(40px, 6.5vw, 84px);
}

.page-about .chapter-band {
  height: 8px;
  width: var(--band-w, 36%);
  max-width: 100%;
  margin-bottom: clamp(20px, 3vw, 32px);
  background: linear-gradient(
    90deg,
    var(--signal-500) 0%,
    var(--signal-500) 56%,
    var(--scan-400) 100%
  );
  transition: width 220ms var(--ease);
}

.page-about .display-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.4vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--highlight-050);
  max-width: 20ch;
  margin: 10px 0 0;
}

.page-about .lede {
  color: var(--text);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  max-width: 52ch;
  margin: 18px 0 0;
}

.page-about .section-head {
  max-width: 60ch;
}

.page-about .section-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.28;
  color: var(--highlight-050);
  margin: 10px 0 0;
}

.page-about .section-sub {
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.8;
  margin: 14px 0 0;
  max-width: 62ch;
}

/* ---------- 01 首屏 ---------- */
.page-about .lead-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .lead-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .fact-list {
  margin: 0;
  display: grid;
  gap: 14px;
  padding: var(--about-pad);
  background: var(--ink-800);
  border: 1px solid var(--line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    0 100%
  );
  box-shadow: var(--shadow-lift);
}

.page-about .fact-list .fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .fact-list .fact:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .fact-list dt {
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.5;
}

.page-about .fact-list dd {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 700;
  color: var(--highlight-050);
  white-space: nowrap;
}

.page-about .fact-list dd.mono {
  color: var(--signal-500);
}

/* ---------- 02 时间线 ---------- */
.page-about .timeline-figure {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
}

.page-about .timeline-holder {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .timeline-track {
  list-style: none;
  margin: 0;
  padding: 26px 0 8px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 78vw);
  gap: 16px;
  width: max-content;
  max-width: 100%;
  position: relative;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  padding-inline: 2px;
  scrollbar-width: thin;
  scrollbar-color: var(--steel-500) transparent;
}

.page-about .timeline-track::-webkit-scrollbar {
  height: 6px;
}

.page-about .timeline-track::-webkit-scrollbar-thumb {
  background: var(--steel-500);
  border-radius: 3px;
}

.page-about .timeline-track::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line);
  pointer-events: none;
}

.page-about .tl-item {
  position: relative;
  scroll-snap-align: start;
  background: var(--ink-800);
  border: 1px solid var(--line);
  padding: 20px 18px 22px;
  display: grid;
  gap: 10px;
  align-content: start;
  transition:
    transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: -26px;
  left: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--scan-400);
  box-shadow: 0 0 0 3px var(--ink-900);
  transition: background var(--dur) var(--ease);
}

.page-about .tl-item:hover,
.page-about .tl-item:focus-within,
.page-about .tl-item:focus {
  transform: translateY(-2px);
  border-color: var(--mist-300);
  outline: none;
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before,
.page-about .tl-item:focus::before {
  background: var(--signal-500);
}

.page-about .tl-ver {
  margin: 0;
  font-size: 12px;
  color: var(--mist-300);
  letter-spacing: 0.02em;
}

.page-about .tl-title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--highlight-050);
}

.page-about .tl-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .tl-outcome {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
  color: var(--scan-400);
}

.page-about .timeline-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 62ch;
  padding-left: 14px;
  border-left: 3px solid var(--signal-500);
}

/* ---------- 03 三块业务 ---------- */
.page-about .service-cols {
  margin-top: clamp(26px, 3.6vw, 40px);
  border-top: 1px solid var(--line);
}

.page-about .service-col {
  padding: 24px 0 26px;
  border-bottom: 1px solid var(--line-soft);
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .service-num {
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--steel-500);
  transition: color var(--dur) var(--ease);
}

.page-about .service-col:hover .service-num {
  color: var(--signal-500);
}

.page-about .service-col h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--highlight-050);
}

.page-about .service-col p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .service-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .service-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-soft);
}

.page-about .service-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--scan-400);
}

.page-about .service-visual {
  margin-top: clamp(26px, 3.6vw, 40px);
  display: grid;
  gap: 22px;
}

.page-about .service-visual-text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .service-visual-tag {
  color: var(--signal-500);
  font-size: 12px;
  margin-bottom: 10px;
}

.page-about .service-visual-text .btn {
  margin-top: 16px;
}

/* ---------- 04 团队 ---------- */
.page-about .team-grid {
  margin-top: clamp(26px, 3.6vw, 40px);
  display: grid;
  gap: 26px;
}

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

.page-about .table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .team-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .team-table caption {
  text-align: left;
  padding: 14px 16px;
  color: var(--text-soft);
  font-size: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-table th,
.page-about .team-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.65;
}

.page-about .team-table tbody tr:last-child th,
.page-about .team-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .team-table thead th {
  font-size: 12px;
  font-weight: 500;
  color: var(--mist-300);
  letter-spacing: 0.06em;
  border-bottom-color: var(--line);
}

.page-about .team-table tbody th {
  font-weight: 600;
  color: var(--highlight-050);
  white-space: nowrap;
}

.page-about .team-table td {
  color: var(--text);
}

.page-about .team-table td.mono {
  font-size: 18px;
  font-weight: 700;
  color: var(--signal-500);
  white-space: nowrap;
}

.page-about .team-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 56ch;
}

/* ---------- 05 合作与认可 ---------- */
.page-about .partner-grid {
  margin-top: clamp(26px, 3.6vw, 40px);
  display: grid;
  gap: 18px;
}

.page-about .partner-card {
  position: relative;
  padding: var(--about-pad);
  background: var(--ink-800);
  border: 1px solid var(--line);
  display: grid;
  gap: 10px;
  align-content: start;
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    0 100%
  );
  transition:
    transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .partner-card:hover {
  transform: translateY(-2px);
  border-color: var(--mist-300);
}

.page-about .partner-num {
  margin: 0;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--signal-500);
}

.page-about .partner-card h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--highlight-050);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .partner-card .btn {
  justify-self: start;
  margin-top: 6px;
}

/* ---------- 06 访问分布 ---------- */
.page-about .dist-grid {
  margin-top: clamp(26px, 3.6vw, 40px);
  display: grid;
  gap: 26px;
}

.page-about .dist-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .dist-stat {
  background: var(--ink-800);
  padding: 16px 14px 18px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .dist-stat-num {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  color: var(--highlight-050);
  line-height: 1.1;
}

.page-about .dist-stat:last-child .dist-stat-num {
  color: var(--scan-400);
}

.page-about .dist-stat p {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-soft);
}

.page-about .dist-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: clamp(14px, 3vw, 22px);
}

.page-about .dist-chart {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-about .dist-grid-lines line {
  stroke: var(--line-soft);
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.page-about .dist-bar rect {
  fill: var(--steel-500);
  transition: fill var(--dur) var(--ease);
}

.page-about .dist-bar:hover rect {
  fill: var(--signal-500);
}

.page-about .dist-bar text {
  fill: var(--text-soft);
  font-family: var(--font-body);
  font-size: 13px;
}

.page-about .dist-bar:hover text {
  fill: var(--highlight-050);
}

.page-about .dist-caption {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .dist-cta {
  margin-top: clamp(24px, 3.4vw, 36px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-about .dist-cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  flex: 1 1 260px;
}

/* ---------- 媒体容器 ---------- */
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.page-about .timeline-figure img {
  aspect-ratio: 1400 / 520;
  height: auto;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .timeline-track {
    grid-auto-columns: minmax(260px, 300px);
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .dist-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .lead-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .lead-aside {
    margin-top: 34px;
  }

  .page-about .service-cols {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(24px, 3.4vw, 44px);
    border-top: 0;
  }

  .page-about .service-col {
    border-bottom: 0;
    border-top: 3px solid var(--steel-500);
    padding: clamp(22px, 2.6vw, 30px) 0 8px;
  }

  .page-about .service-col:first-child {
    border-top-color: var(--signal-500);
  }

  .page-about .service-visual {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    align-items: center;
    gap: clamp(24px, 4vw, 48px);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(16px, 2.4vw, 24px);
    align-items: stretch;
  }

  .page-about .dist-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(24px, 3.4vw, 40px);
  }

  .page-about .dist-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .chapter-band,
  .page-about .tl-item,
  .page-about .tl-item::before,
  .page-about .service-num,
  .page-about .partner-card,
  .page-about .dist-bar rect {
    transition: none;
  }

  .page-about .tl-item:hover,
  .page-about .tl-item:focus-within,
  .page-about .tl-item:focus,
  .page-about .partner-card:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>

.page-about {
  --band-w: 1rem;
}