.page-about {
  --about-shadow: 12px 12px 0 var(--lime-soft);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 20px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 5vw, 56px) 0 clamp(40px, 7vw, 88px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 52px);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-size: clamp(2.4rem, 10vw, 5.25rem);
  font-weight: 300;
  line-height: 1.03;
  letter-spacing: -0.02em;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-size: var(--step-2);
  color: var(--grey);
}

.page-about .about-hero__facts .mono {
  font-size: var(--step-4);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--ink);
  box-shadow: var(--about-shadow);
}

.page-about .about-hero__figure .media__caption {
  margin-top: 14px;
  font-size: var(--step-1);
  color: var(--grey);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__head {
  max-width: 52ch;
}

.page-about .about-timeline__head .section-title {
  margin: 10px 0 14px;
}

.page-about .about-timeline__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: clamp(30px, 5vw, 56px);
}

.page-about .about-yearnav ol {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-yearnav ol::-webkit-scrollbar {
  display: none;
}

.page-about .about-yearnav a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--grey);
  font-size: var(--step-1);
  padding-bottom: 5px;
  border-bottom: 2px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-yearnav a .mono {
  color: var(--ink);
  font-weight: 500;
}

.page-about .about-yearnav a:hover,
.page-about .about-yearnav a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--lime);
}

.page-about .about-rail {
  list-style: none;
  margin: 0;
  padding: 0 0 22px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(262px, 84%);
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-about .about-stage {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--ink);
}

.page-about .about-stage__num {
  align-self: flex-start;
  padding: 2px 9px;
  font-size: var(--step-1);
  background: var(--lime);
  border: 1px solid var(--ink);
}

.page-about .about-stage__year {
  margin: 4px 0 0;
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-about .about-stage__name {
  margin: 0;
  font-size: clamp(1.6rem, 5vw, 2.15rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.14;
}

.page-about .about-stage__text {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.75;
}

.page-about .about-stage__figure {
  margin: 6px 0 0;
}

.page-about .about-stage__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--rule);
}

.page-about .about-stage .disclosure {
  margin-top: auto;
}

/* ---------- 服务网络 ---------- */
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 64px);
}

.page-about .about-network__main .section-title {
  margin: 10px 0 16px;
}

.page-about .about-network__points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px dashed var(--rule);
}

.page-about .about-network__points li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px dashed var(--rule);
}

.page-about .about-network__points .mono {
  padding-top: 3px;
  color: var(--grey);
  letter-spacing: 0.08em;
}

.page-about .about-network__points p {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .about-network__legend {
  background: var(--forest);
  border: 1px solid var(--ink);
  padding: 22px;
  align-self: start;
}

.page-about .about-network__legend svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-network__legend .mono {
  display: block;
  margin-top: 14px;
  font-size: var(--step-1);
  line-height: 1.7;
  color: rgba(252, 251, 247, 0.72);
  letter-spacing: 0.04em;
}

/* ---------- 日常运营三件事 ---------- */
.page-about .about-ops__head {
  max-width: 54ch;
}

.page-about .about-ops__head .section-title {
  margin: 10px 0 14px;
}

.page-about .about-ops__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-ops__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  background: var(--paper);
  border: 1px solid var(--ink);
}

.page-about .about-ops__card:nth-child(2) {
  background: var(--lime-soft);
}

.page-about .about-ops__card:nth-child(3) {
  background: var(--clay-soft);
}

.page-about .about-ops__card .card__label {
  margin: 0;
  color: var(--grey);
  letter-spacing: 0.08em;
}

.page-about .about-ops__card .card__title {
  margin: 0;
  font-size: var(--step-4);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-ops__card .card__text {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.75;
}

.page-about .about-ops__card .card__meta {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(21, 23, 27, 0.16);
  color: var(--grey);
  letter-spacing: 0.06em;
}

/* ---------- 运营理念 ---------- */
.page-about .about-standard__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-standard__main .section-title {
  margin: 10px 0 16px;
}

.page-about .about-standard__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about .about-standard__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding-left: 14px;
  border-left: 2px solid var(--lime);
}

.page-about .about-standard__item .mono {
  color: var(--forest);
  font-weight: 700;
  padding-top: 4px;
  letter-spacing: 0.06em;
}

.page-about .about-standard__item h3 {
  margin: 0 0 6px;
  font-size: var(--step-4);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-standard__item p {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.75;
  max-width: 56ch;
}

.page-about .about-standard__figure {
  margin: 0;
  align-self: start;
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 12px;
  box-shadow: var(--about-shadow);
}

.page-about .about-standard__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-standard__figure .media__caption {
  margin: 12px 0 2px;
  font-size: var(--step-1);
  color: var(--grey);
  line-height: 1.7;
}

/* ---------- 未来一年 ---------- */
.page-about .about-next__head {
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-about .about-next__head .section-title {
  margin: 10px 0 0;
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--ink);
}

.page-about .about-next__item {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}

.page-about .about-next__num {
  margin: 0 0 10px;
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-about .about-next__item h3 {
  margin: 0 0 8px;
  font-size: var(--step-4);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-next__item p {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.75;
  color: var(--grey);
  max-width: 40ch;
}

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  background: var(--lime);
  border: 1px solid var(--ink);
  padding: clamp(26px, 5vw, 52px);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 5.5vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.page-about .about-cta__text {
  margin: 0 0 24px;
  font-size: var(--step-3);
  line-height: 1.75;
  max-width: 54ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-rail {
    grid-auto-columns: minmax(320px, 46%);
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-standard__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }

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

  .page-about .about-next__item {
    padding: 26px 26px 26px 0;
    border-bottom: none;
    border-right: 1px solid var(--rule);
  }

  .page-about .about-next__item:last-child {
    border-right: none;
    padding-right: 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-timeline__body {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .about-yearnav {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-yearnav ol {
    flex-direction: column;
    gap: 20px;
    overflow: visible;
  }

  .page-about .about-yearnav a {
    border-bottom: none;
    border-left: 2px solid var(--rule);
    padding: 3px 0 3px 12px;
  }

  .page-about .about-yearnav a:hover,
  .page-about .about-yearnav a:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--lime);
  }

  .page-about .about-rail {
    grid-auto-columns: minmax(348px, 42%);
    padding-bottom: 30px;
  }

  .page-about .about-stage:nth-child(even) {
    margin-top: 26px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail {
    scroll-behavior: auto;
  }

  .page-about .about-stage:nth-child(even) {
    margin-top: 0;
  }
}
</PAGE_CSS>>>