.page-about {
  --about-epoch-w: 132px;
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

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

.page-about .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
}
.page-about .breadcrumb-link {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}
.page-about .breadcrumb-sep {
  color: var(--grid);
}
.page-about .breadcrumb-current {
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 44px;
  border-bottom: var(--hair);
  background:
    radial-gradient(90% 70% at 88% 2%, rgba(199, 255, 61, 0.13), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, #0b1a14 100%);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(58, 74, 66, 0.55) 1px, transparent 1px);
  background-size: 96px 100%;
  opacity: 0.45;
  pointer-events: none;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .about-hero-inner {
  display: grid;
  gap: 30px;
  align-items: end;
}
.page-about .about-hero-label {
  margin: 0 0 14px;
  color: var(--gold);
}
.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--mist);
}
.page-about .about-hero h1 em {
  position: relative;
  font-style: normal;
  color: var(--lime);
  white-space: nowrap;
}
.page-about .about-hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.04em;
  height: 2px;
  background: var(--lime);
  opacity: 0.5;
}
.page-about .about-lede {
  max-width: 46ch;
  margin: 0;
  font-size: 15px;
  color: #cfd8cc;
}
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--grid);
  border-top: var(--hair);
  border-bottom: var(--hair);
}
.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  background: var(--ink);
}
.page-about .about-metric-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--mist);
  line-height: 1.15;
}
.page-about .about-metric-unit {
  font-size: 13px;
  margin-left: 2px;
  color: var(--lime);
}
.page-about .about-metric-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-jump a {
  position: relative;
  display: inline-block;
  padding: 2px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
  transform: translateY(-2px);
}

.page-about .about-hero-media {
  margin: 0;
  border: var(--hair);
}
.page-about .about-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) brightness(0.86);
}

/* ---------- 通用章节 ---------- */
.page-about .section {
  padding: 54px 0;
  border-top: var(--hair);
}
.page-about .section--alt {
  background: var(--char);
}
.page-about .section-head {
  display: grid;
  gap: 10px;
  max-width: 860px;
  margin-bottom: 36px;
}
.page-about .section-kicker {
  margin: 0;
  color: var(--gold);
}
.page-about .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.4vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--mist);
}
.page-about .section-desc {
  margin: 0;
  font-size: 14px;
  color: var(--steel);
  max-width: 60ch;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--grid) 38%, var(--grid) 100%);
}
.page-about .about-epoch {
  position: relative;
  display: grid;
  gap: 6px;
  padding-bottom: 30px;
}
.page-about .about-epoch:last-child {
  padding-bottom: 0;
}
.page-about .about-epoch::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--ink);
  border: 1px solid var(--lime);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .about-epoch:hover::before,
.page-about .about-epoch:focus-within::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(199, 255, 61, 0.15);
}
.page-about .about-epoch-year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--lime);
  transition: color var(--dur) var(--ease);
}
.page-about .about-epoch:hover .about-epoch-year {
  color: var(--gold);
}
.page-about .about-epoch-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.35;
  color: var(--mist);
}
.page-about .about-epoch-body p {
  margin: 0 0 10px;
  font-size: 14px;
  color: #c6d0c5;
  max-width: 66ch;
}
.page-about .about-epoch-note {
  font-size: 13px;
  color: var(--steel);
  padding-left: 12px;
  border-left: 2px solid var(--pine);
}
.page-about .about-epoch-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-epoch--now .about-epoch-title {
  color: var(--lime);
}

/* ---------- 三层体系 ---------- */
.page-about .about-layer-grid {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: var(--hair);
}
.page-about .about-layer {
  padding: 22px 20px;
  background: var(--char);
  transition: background var(--dur) var(--ease);
}
.page-about .about-layer:hover {
  background: var(--pine);
}
.page-about .about-layer-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}
.page-about .about-layer h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--mist);
}
.page-about .about-layer p {
  margin: 0;
  font-size: 13px;
  color: var(--steel);
}

.page-about .about-flow {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--grid);
  border: var(--hair);
}
.page-about .about-flow-step {
  position: relative;
  padding: 20px;
  background: var(--ink);
}
.page-about .about-flow-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--pine);
  line-height: 1;
  margin-bottom: 10px;
}
.page-about .about-flow-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--lime);
}
.page-about .about-flow-step p {
  margin: 0;
  font-size: 13px;
  color: var(--steel);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network-grid {
  display: grid;
  gap: 26px;
}
.page-about .about-network-media {
  margin: 0;
  border: var(--hair);
  background: var(--char);
}
.page-about .about-network-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.9);
}
.page-about .about-network-media .media-caption {
  padding: 10px 12px;
  font-size: 12px;
  color: var(--steel);
  border-top: var(--hair);
}
.page-about .about-network-label {
  margin: 0 0 10px;
  color: var(--gold);
}
.page-about .about-network-label + .about-node-list {
  margin-top: 0;
}
.page-about .about-node-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}
.page-about .about-node-list--primary {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border: var(--hair);
}
.page-about .about-node {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--ink);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-node-list--primary .about-node:hover {
  background: var(--pine);
  transform: translateX(2px);
}
.page-about .about-node-city {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--mist);
  letter-spacing: 0.02em;
}
.page-about .about-node-desc {
  font-size: 13px;
  color: var(--steel);
}
.page-about .about-node--flat {
  flex-direction: row;
  padding: 6px 12px;
  border: 1px solid var(--grid);
  background: transparent;
}
.page-about .about-node--flat .about-node-city {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel);
}
.page-about .about-node--flat:hover {
  border-color: var(--lime);
}
.page-about .about-node--flat:hover .about-node-city {
  color: var(--lime);
}
.page-about .about-network-note {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-size: 13px;
  color: var(--steel);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 24px;
}
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: var(--hair);
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 12px;
  background: var(--ink);
}
.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.8rem, 6vw, 2.6rem);
  line-height: 1;
  color: var(--lime);
  letter-spacing: 0.02em;
}
.page-about .about-stat-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
}
.page-about .about-team-side .label {
  margin: 0 0 10px;
  color: var(--gold);
}
.page-about .about-response-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--hair);
}
.page-about .about-response-list li {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-bottom: var(--hair);
  font-size: 13px;
}
.page-about .about-response-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
}
.page-about .about-response-val {
  color: var(--mist);
}
.page-about .about-team-media {
  margin: 26px 0 0;
  border: var(--hair);
}
.page-about .about-team-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) brightness(0.85);
}
.page-about .about-team-media .media-caption {
  padding: 10px 12px;
  font-size: 12px;
  color: var(--steel);
  border-top: var(--hair);
}

.page-about .about-folds {
  margin-top: 26px;
  border-top: var(--hair);
}
.page-about .about-fold {
  border-bottom: var(--hair);
}
.page-about .about-fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 0;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--mist);
  list-style: none;
  transition: color var(--dur) var(--ease);
}
.page-about .about-fold summary::-webkit-details-marker {
  display: none;
}
.page-about .about-fold summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--lime);
  transition: transform var(--dur) var(--ease);
}
.page-about .about-fold[open] summary::after {
  content: "−";
}
.page-about .about-fold summary:hover {
  color: var(--lime);
}
.page-about .about-fold summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}
.page-about .about-fold p {
  margin: 0 0 16px;
  padding-left: 12px;
  border-left: 2px solid var(--pine);
  font-size: 13px;
  color: var(--steel);
  max-width: 64ch;
}

/* ---------- 合作 ---------- */
.page-about .about-partner-grid {
  display: grid;
  gap: 18px;
}
.page-about .about-partner-card {
  padding: 22px 20px;
  background: var(--char);
  border: var(--hair);
}
.page-about .about-partner-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.02em;
}
.page-about .about-partner-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--mist);
}
.page-about .about-partner-card p {
  margin: 0;
  font-size: 13px;
  color: var(--steel);
}
.page-about .about-partner-note {
  display: grid;
  gap: 16px;
  justify-items: start;
  margin-top: 24px;
  padding: 20px;
  background: var(--pine);
  border-left: 3px solid var(--lime);
}
.page-about .about-partner-note p {
  margin: 0;
  font-size: 14px;
  color: #d6e0d2;
  max-width: 66ch;
}

/* ---------- 行动 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(80% 90% at 12% 0%, rgba(230, 180, 80, 0.14), transparent 60%),
    var(--char);
}
.page-about .about-cta-grid {
  display: grid;
  gap: 28px;
}
.page-about .about-cta-desc {
  margin: 14px 0 22px;
  font-size: 14px;
  color: var(--steel);
  max-width: 58ch;
}
.page-about .about-contact-panel {
  padding: 22px 20px;
  border: 1px solid var(--grid);
  background: var(--ink);
}
.page-about .about-contact-panel .label {
  margin: 0 0 14px;
  color: var(--gold);
}
.page-about .about-contact-list {
  margin: 0;
  padding: 0;
}
.page-about .about-contact-row {
  display: grid;
  gap: 2px;
  padding: 10px 0;
  border-bottom: var(--hair);
}
.page-about .about-contact-row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
}
.page-about .about-contact-row dd {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
  word-break: break-word;
}
.page-about .about-contact-note {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--steel);
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about {
    --about-epoch-w: 150px;
  }
  .page-about .about-hero {
    padding: 34px 0 60px;
  }
  .page-about .about-hero-inner {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
  }
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-metric {
    padding: 16px 18px;
  }
  .page-about .section {
    padding: 78px 0;
  }
  .page-about .section-head {
    margin-bottom: 48px;
  }
  .page-about .about-epoch {
    grid-template-columns: var(--about-epoch-w) minmax(0, 1fr);
    gap: 40px;
    padding-bottom: 40px;
  }
  .page-about .about-epoch-year {
    font-size: 26px;
    padding-top: 2px;
  }
  .page-about .about-epoch::before {
    left: -30px;
    top: 14px;
  }
  .page-about .about-layer-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow-step + .about-flow-step {
    border-left: 1px solid var(--grid);
  }
  .page-about .about-network-grid {
    grid-template-columns: 4fr 8fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-node-list--primary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team-grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-stats {
    grid-template-columns: 1fr;
    align-self: start;
  }
  .page-about .about-stat {
    flex-direction: row;
    align-items: baseline;
    gap: 16px;
    padding: 16px 20px;
  }
  .page-about .about-stat-num {
    min-width: 90px;
  }
  .page-about .about-response-list li {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
  .page-about .about-partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
  .page-about .about-partner-card--offset {
    transform: translateY(24px);
  }
  .page-about .about-partner-note {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    margin-top: 52px;
    padding: 26px 28px;
  }
  .page-about .about-cta-grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-contact-panel {
    padding: 26px 24px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero h1 {
    letter-spacing: -0.03em;
  }
  .page-about .about-network-label {
    margin-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    transform: none !important;
  }
}
<<<END>>>