.page-about {
  background: var(--cream-000);
  color: var(--ink-900);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .about-shell {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-block: 20px 0;
  font-size: 13px;
  color: var(--slate-500);
}

.page-about .about-crumb a {
  color: var(--lake-600);
  text-decoration: none;
}

.page-about .about-crumb a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 48px) clamp(32px, 5vw, 56px);
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  display: block;
  margin-top: clamp(28px, 4vw, 44px);
  height: 2px;
  background: linear-gradient(90deg, var(--sunset-500) 0%, var(--gold-400) 34%, transparent 100%);
}

.page-about .about-hero__eyebrow {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lake-600);
  text-transform: uppercase;
  margin: 0 0 16px;
}

.page-about .about-hero__title {
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  max-width: 20ch;
}

.page-about .about-hero__title::before {
  content: "";
  display: block;
  width: 56px;
  height: 6px;
  background: var(--sunset-500);
  margin-bottom: 20px;
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--ink-900);
  max-width: 62ch;
  margin: 0 0 36px;
}

.page-about .about-hero__nums {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--ink-900);
  border: var(--bd);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__nums li {
  background: var(--mist-100);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__num {
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--lake-900);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__label {
  font-size: 13px;
  color: var(--slate-500);
}

/* ---------- 页内跳转 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-block: 24px clamp(32px, 5vw, 56px);
}

.page-about .about-jump a {
  display: inline-block;
  padding: 7px 14px;
  font-size: 13px;
  border: 2px solid var(--ink-900);
  background: var(--cream-000);
  color: var(--ink-900);
  text-decoration: none;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  background: var(--sunset-500);
  color: var(--cream-000);
  outline: none;
}

/* ---------- 通用小节头 ---------- */
.page-about .about-sec {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-sec--light .sec-head__title {
  color: var(--cream-000);
}

.page-about .about-sec--light .sec-head__desc {
  color: var(--mist-100);
}

.page-about .about-sec--light .sec-head__num {
  color: var(--sunset-500);
}

.page-about .about-sec--tight {
  margin-bottom: 18px;
}

/* ---------- 阶段轨道 ---------- */
.page-about .about-phases {
  padding-block: clamp(40px, 6vw, 80px);
  background:
    linear-gradient(180deg, var(--mist-100) 0%, var(--cream-000) 100%);
  border-top: var(--bd);
  border-bottom: var(--bd);
}

.page-about .about-phases__grid {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 4px;
  position: relative;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--sunset-500) 0%, var(--gold-400) 62%, rgba(201, 145, 47, .18) 100%);
}

.page-about .about-track__item {
  position: relative;
  padding: 0 0 30px 50px;
}

.page-about .about-track__item:last-child {
  padding-bottom: 0;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--sunset-500);
  border: 2px solid var(--cream-000);
  box-shadow: 0 0 0 2px var(--sunset-500);
}

.page-about .about-track__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--lake-600);
  margin-bottom: 4px;
}

.page-about .about-track__title {
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--ink-900);
}

.page-about .about-track__text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-900);
  max-width: 52ch;
}

.page-about .about-phases__fig {
  margin: 0;
  border: var(--bd);
  background: var(--cream-000);
  box-shadow: var(--shadow-hard);
  padding: 12px;
  transform: rotate(-1deg);
}

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

.page-about .about-phases__cap {
  margin-top: 10px;
  font-size: 12px;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ---------- 运营体量 ---------- */
.page-about .about-scale {
  padding-block: clamp(44px, 6vw, 88px);
  background:
    linear-gradient(155deg, var(--lake-900) 0%, var(--lake-600) 100%);
  color: var(--cream-000);
}

.page-about .about-scale__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: rgba(246, 242, 233, .28);
  border: 2px solid var(--cream-000);
}

.page-about .about-scale__cell {
  background: rgba(12, 59, 78, .72);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-scale__cell:nth-child(odd) {
  background: rgba(12, 59, 78, .88);
}

.page-about .about-scale__num {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--sunset-500);
  font-variant-numeric: tabular-nums;
}

.page-about .about-scale__unit {
  font-size: 13px;
  color: var(--gold-400);
  letter-spacing: .04em;
}

.page-about .about-scale__cell p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-100);
}

/* ---------- 维护流程 ---------- */
.page-about .about-process {
  padding-block: clamp(44px, 6vw, 88px);
  background: var(--cream-000);
  position: relative;
}

.page-about .about-process::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--gold-400) 0 14px, transparent 14px 28px);
  opacity: .55;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  counter-reset: flow;
}

.page-about .about-flow__step {
  background: var(--orange-tint-100);
  border: var(--bd);
  box-shadow: var(--shadow-soft);
  padding: 22px 20px;
  position: relative;
}

.page-about .about-flow__step:nth-child(2n) {
  background: var(--mist-100);
  transform: rotate(.6deg);
}

.page-about .about-flow__step:nth-child(2n + 1) {
  transform: rotate(-.6deg);
}

.page-about .about-flow__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--sunset-500);
  color: var(--cream-000);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-900);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(44px, 6vw, 88px);
  background: var(--mist-100);
  border-top: var(--bd);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-team__card {
  border: var(--bd);
  background: var(--cream-000);
  box-shadow: var(--shadow-hard);
  padding: 24px 22px;
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .about-team__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(31, 27, 23, .2);
}

.page-about .about-team__card--a {
  border-left: 6px solid var(--sunset-500);
}

.page-about .about-team__card--b {
  border-left: 6px solid var(--lake-600);
}

.page-about .about-team__card--c {
  border-left: 6px solid var(--gold-400);
}

.page-about .about-team__count {
  display: inline-block;
  font-size: 26px;
  font-weight: 700;
  color: var(--lake-900);
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-900);
}

.page-about .about-team__partner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
  background: var(--lake-900);
  color: var(--cream-000);
  border: var(--bd);
  padding: clamp(22px, 3vw, 36px);
}

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

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

.page-about .about-team__partner-title {
  margin: 0 0 12px;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--sunset-500);
}

.page-about .about-team__partner-text p {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--mist-100);
}

.page-about .about-team__partner-text p:last-child {
  margin-bottom: 0;
}

/* ---------- 地区归属 ---------- */
.page-about .about-home-base {
  padding-block: clamp(44px, 6vw, 88px);
  background: var(--cream-000);
  border-top: var(--bd);
}

.page-about .about-home-base__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-home-base__text p {
  margin: 0 0 16px;
  font-size: 15.5px;
  max-width: 58ch;
}

.page-about .about-home-base__meta {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-home-base__meta > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(110, 123, 132, .5);
}

.page-about .about-home-base__meta dt {
  font-size: 12.5px;
  color: var(--slate-500);
  min-width: 76px;
  letter-spacing: .04em;
}

.page-about .about-home-base__meta dd {
  margin: 0;
  font-size: 15px;
  color: var(--ink-900);
}

.page-about .about-home-base__meta dd a {
  color: var(--lake-600);
  text-decoration: none;
  border-bottom: 2px solid var(--orange-tint-100);
}

.page-about .about-home-base__meta dd a:hover {
  border-bottom-color: var(--sunset-500);
}

.page-about .about-home-base__fig {
  margin: 0;
  border: var(--bd);
  overflow: hidden;
  background: linear-gradient(140deg, var(--lake-600), var(--lake-900));
}

.page-about .about-home-base__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 收尾回链 ---------- */
.page-about .about-next {
  padding-block: clamp(40px, 5vw, 76px);
  background: var(--lake-900);
  color: var(--cream-000);
}

.page-about .about-next__title {
  margin: 0 0 clamp(22px, 3vw, 34px);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 900;
  letter-spacing: -0.01em;
}

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

.page-about .about-next__link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 2px 16px;
  padding: 20px 22px;
  border: 2px solid var(--mist-100);
  background: transparent;
  color: var(--cream-000);
  text-decoration: none;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--sunset-500);
  border-color: var(--sunset-500);
  outline: none;
}

.page-about .about-next__no {
  grid-row: 1 / span 2;
  align-self: center;
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 700;
  color: var(--sunset-500);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.page-about .about-next__link:hover .about-next__no,
.page-about .about-next__link:focus-visible .about-next__no {
  color: var(--cream-000);
}

.page-about .about-next__name {
  font-size: 17px;
  font-weight: 900;
}

.page-about .about-next__hint {
  font-size: 13px;
  color: var(--mist-100);
}

.page-about .about-next__link:hover .about-next__hint,
.page-about .about-next__link:focus-visible .about-next__hint {
  color: var(--cream-000);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__nums {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-phases__grid {
    grid-template-columns: 7fr 4fr;
    gap: 56px;
  }

  .page-about .about-phases__fig {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .about-team__card--b {
    margin-top: 40px;
  }

  .page-about .about-team__card--c {
    margin-top: 80px;
  }

  .page-about .about-team__partner {
    grid-template-columns: 5fr 6fr;
    gap: 40px;
  }

  .page-about .about-home-base__grid {
    grid-template-columns: 6fr 5fr;
    gap: 48px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-scale__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-flow__step:nth-child(2n),
  .page-about .about-flow__step:nth-child(2n + 1) {
    transform: rotate(-.7deg);
  }

  .page-about .about-flow__step:nth-child(2),
  .page-about .about-flow__step:nth-child(4) {
    transform: rotate(.8deg) translateY(14px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-flow__step,
  .page-about .about-next__link,
  .page-about .about-jump a {
    transition: none;
  }
}
</main>