.page-about {
  background: var(--salt);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .breadcrumbs {
  padding-top: var(--sp-3);
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-mute);
}

.page-about .breadcrumbs a {
  color: var(--lake);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--ochre-dark);
  text-decoration: underline;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--grid);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: var(--sp-4) 0 var(--sp-5);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 62%;
  height: 100%;
  background: linear-gradient(155deg, rgba(27, 107, 140, 0.12), rgba(181, 101, 29, 0.07) 70%, rgba(247, 245, 239, 0));
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
  align-items: end;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 8vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  color: var(--ink);
}

.page-about .about-hero-lead {
  margin: var(--sp-3) 0 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--sp-3);
}

.page-about .hero-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: var(--sp-4) 0 0;
  border-top: 1px solid var(--rule);
}

.page-about .hero-figure {
  padding: 16px 12px 0 0;
  border-right: 1px solid var(--rule);
}

.page-about .hero-figure:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-about .hero-figure dt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-mute);
}

.page-about .hero-figure dd {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.2;
  color: var(--lake-deep);
}

.page-about .hero-figure .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero-media {
  margin: 0;
  position: relative;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--r-md);
  border: 1px solid var(--rule);
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-hero-media figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}

/* 起点 */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .origin-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ochre-dark);
}

.page-about .origin-body p {
  margin: 0 0 var(--sp-2);
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .origin-list {
  list-style: none;
  margin: var(--sp-3) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule);
}

.page-about .origin-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .origin-k {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  padding-top: 2px;
}

/* 历程 */
.page-about .eras {
  background: linear-gradient(180deg, rgba(220, 230, 232, 0.34), rgba(247, 245, 239, 0));
}

.page-about .eras-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
}

.page-about .eras-media {
  margin: var(--sp-3) 0 0;
}

.page-about .eras-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--r-md);
  border: 1px solid var(--rule);
}

.page-about .era-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .era {
  position: relative;
  padding: 0 0 var(--sp-4) 44px;
  border-left: 1px solid var(--rule);
}

.page-about .era:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .era-marker {
  position: absolute;
  left: 0;
  top: 0;
  transform: translateX(-50%);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  background: var(--paper);
  border: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre-dark);
}

.page-about .era-body {
  padding-left: 8px;
}

.page-about .era-tag {
  display: inline-block;
  margin: 4px 0 0;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  background: rgba(181, 101, 29, 0.12);
  color: var(--ochre-dark);
  font-size: 13px;
  line-height: 1.4;
  font-weight: 600;
}

.page-about .era-body h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.3;
  color: var(--ink);
}

.page-about .era-body > p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

.page-about .era-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .era-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background: var(--lake);
}

/* 服务网络 */
.page-about .network {
  background: var(--lake-deep);
  color: var(--salt);
}

.page-about .network .section-title,
.page-about .network .section-lead,
.page-about .network .origin-index {
  color: var(--salt);
}

.page-about .network .section-lead {
  color: rgba(247, 245, 239, 0.82);
}

.page-about .network-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
}

.page-about .network-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(143, 169, 177, 0.32);
  border: 1px solid rgba(143, 169, 177, 0.32);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .network-figures li {
  background: var(--lake-deep);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .figure-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  line-height: 1.1;
  color: var(--flag-yellow);
  letter-spacing: -0.01em;
}

.page-about .figure-unit {
  font-size: 16px;
  margin-left: 2px;
}

.page-about .figure-label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(247, 245, 239, 0.74);
}

.page-about .network-body {
  margin-top: var(--sp-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
}

.page-about .region-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .region {
  position: relative;
  padding: 16px 14px 14px;
  background: rgba(247, 245, 239, 0.06);
  border: 1px solid rgba(143, 169, 177, 0.42);
  border-radius: var(--r-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .region:hover,
.page-about .region:focus-visible,
.page-about .region:focus {
  background: rgba(227, 178, 60, 0.14);
  border-color: var(--flag-yellow);
  transform: translateY(-2px);
  outline: none;
}

.page-about .region-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.3;
  color: var(--salt);
}

.page-about .region-tip {
  font-size: 13px;
  line-height: 1.55;
  color: rgba(247, 245, 239, 0.7);
}

.page-about .region:hover .region-tip,
.page-about .region:focus .region-tip,
.page-about .region:focus-visible .region-tip {
  color: var(--salt);
}

.page-about .network-media {
  margin: 0;
}

.page-about .network-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--r-md);
  border: 1px solid rgba(143, 169, 177, 0.38);
}

.page-about .network-media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: rgba(247, 245, 239, 0.66);
}

/* 团队 */
.page-about .crew-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
}

.page-about .crew-copy p {
  margin: var(--sp-2) 0 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 30em;
}

.page-about .crew-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-3);
}

.page-about .crew-row {
  position: relative;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}

.page-about .crew-row-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .crew-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 40px;
  line-height: 1;
  font-weight: 700;
  color: var(--lake);
}

.page-about .crew-role {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
}

.page-about .crew-row p {
  margin: 10px 0 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .crew-bar {
  display: block;
  height: 5px;
  border-radius: 999px;
  background: var(--rule);
  position: relative;
  overflow: hidden;
}

.page-about .crew-bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 999px;
  background: var(--lake);
}

.page-about .crew-bar--rd::after {
  width: 49%;
}

.page-about .crew-bar--cs::after {
  width: 21%;
  background: var(--ochre);
}

.page-about .crew-bar--ss::after {
  width: 14%;
  background: var(--flag-green);
}

/* 运营保障 */
.page-about .assurance-list {
  list-style: none;
  margin: var(--sp-3) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .assurance-item {
  background: var(--paper);
  padding: 22px 18px;
  border-left: 3px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .assurance-item:hover {
  border-left-color: var(--ochre);
  background: #FDFCF8;
}

.page-about .assurance-k {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ochre-dark);
  padding: 3px 8px;
  background: rgba(181, 101, 29, 0.1);
  border-radius: var(--r-sm);
}

.page-about .assurance-item h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .assurance-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 合作场景 */
.page-about .scenes {
  background: linear-gradient(180deg, rgba(220, 230, 232, 0.42), rgba(247, 245, 239, 0));
  padding-bottom: var(--sp-5);
}

.page-about .scenes-head {
  max-width: 44em;
}

.page-about .scenes-head .section-lead {
  margin-top: var(--sp-2);
}

.page-about .scene-strip {
  margin-top: var(--sp-4);
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 4px 16px 20px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .scene-card {
  flex: 0 0 82%;
  scroll-snap-align: start;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  padding: 20px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .scene-card:hover {
  border-color: var(--lake);
  transform: translateY(-3px);
}

.page-about .scene-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ochre);
}

.page-about .scene-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.3;
  color: var(--ink);
}

.page-about .scene-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .scene-card--cta {
  background: var(--lake);
  border-color: var(--lake);
}

.page-about .scene-card--cta .scene-no {
  color: var(--flag-yellow);
}

.page-about .scene-card--cta h3,
.page-about .scene-card--cta p {
  color: var(--salt);
}

.page-about .scene-card--cta p {
  color: rgba(247, 245, 239, 0.84);
}

.page-about .scene-go {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--flag-yellow);
}

/* 结尾行动 */
.page-about .about-cta {
  padding-bottom: var(--sp-5);
}

.page-about .about-cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-3);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--ochre);
  border-radius: var(--r-md);
  background: var(--paper);
}

.page-about .about-cta-copy p {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* 平板及以上 */
@media (min-width: 700px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
    gap: var(--sp-4);
  }

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

  .page-about .region-map {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .scene-card {
    flex: 0 0 300px;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1.4fr) auto;
    align-items: center;
    padding: var(--sp-4);
  }
}

/* 桌面 */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: var(--sp-5) 0 var(--sp-6);
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: var(--sp-5);
  }

  .page-about .about-hero-media img {
    height: 480px;
  }

  .page-about .eras-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-about .eras-head {
    position: sticky;
    top: 96px;
  }

  .page-about .network-top {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: var(--sp-4);
    align-items: end;
  }

  .page-about .network-body {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: var(--sp-3);
    align-items: start;
  }

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

  .page-about .crew-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-about .origin-grid {
    gap: var(--sp-5);
  }

  .page-about .origin-aside {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1200px) {
  .page-about .scene-strip {
    justify-content: flex-start;
    padding-left: max(16px, calc((100vw - var(--shell)) / 2 + var(--gutter)));
    padding-right: max(16px, calc((100vw - var(--shell)) / 2 + var(--gutter)));
  }

  .page-about .scene-card {
    flex: 0 0 320px;
  }
}

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

  .page-about .region:hover,
  .page-about .region:focus,
  .page-about .scene-card:hover {
    transform: none;
  }
}