.page-about {
  --about-rule: 1px solid var(--c-grid);
  --about-breath: clamp(56px, 9vw, 128px);
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--f-body);
  overflow-x: hidden;
}

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

.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(28px, 5vw, 56px) var(--about-breath);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

.page-about .about-hero__kicker {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-graphite);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 15ch;
}

.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--c-ink);
  max-width: 46ch;
}

.page-about .about-hero__lede--sub {
  margin-top: 16px;
  color: var(--c-graphite);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
  background: var(--c-grid);
  border: var(--about-rule);
}

.page-about .about-hero__stat {
  margin: 0;
  padding: 16px 14px 18px;
  background: var(--c-paper);
}

.page-about .about-hero__stat-label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-graphite);
}

.page-about .about-hero__stat-value {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--f-mono);
  font-weight: 700;
  color: var(--c-red);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__unit {
  font-family: var(--f-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-graphite);
}

.page-about .about-hero__figure {
  margin: 0;
  border: var(--about-rule);
  background: var(--c-frost);
  position: relative;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: auto -8px -8px auto;
  width: 42%;
  height: 42%;
  background: var(--c-ice);
  opacity: 0.16;
  z-index: -1;
}

.page-about .about-hero__figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .about-hero__figcap {
  padding: 10px 14px;
  border-top: var(--about-rule);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-graphite);
  background: var(--c-paper);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  padding-block: var(--about-breath);
  border-top: var(--about-rule);
}

.page-about .about-section--frost {
  background: var(--c-frost);
}

.page-about .about-section--ink {
  background: var(--c-ice);
  border-top-color: var(--c-ice-deep);
}

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-title--light {
  color: var(--c-paper);
}

.page-about .about-kicker--light {
  color: var(--c-ice-soft);
}

.page-about .about-note--light {
  color: rgba(251, 249, 245, 0.74);
}

.page-about .about-inline-link {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* ---------- 数字档位 ---------- */

.page-about .about-num-sm {
  font-family: var(--f-mono);
  font-size: 26px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-about .about-num-md {
  font-family: var(--f-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-about .about-num-lg {
  font-family: var(--f-mono);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

/* ---------- 服务网格 ---------- */

.page-about .about-services {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c-grid);
  border: var(--about-rule);
}

.page-about .about-service {
  background: var(--c-frost);
  padding: clamp(22px, 3.4vw, 36px);
  margin: 0;
}

.page-about .about-service__index {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-red);
}

.page-about .about-service__title {
  margin: 0 0 12px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(19px, 2.2vw, 23px);
  letter-spacing: -0.01em;
}

.page-about .about-service__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-graphite);
}

/* ---------- 时间跨度图 ---------- */

.page-about .about-spanfigure {
  margin: 0 0 clamp(36px, 5vw, 60px);
  border: var(--about-rule);
  background: var(--c-paper);
}

.page-about .about-spanfigure img {
  width: 100%;
  aspect-ratio: 12 / 5;
  object-fit: cover;
}

.page-about .about-spanfigure__cap {
  padding: 12px 16px;
  border-top: var(--about-rule);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-graphite);
}

/* ---------- 时间线 ---------- */

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

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-block: clamp(24px, 3.6vw, 38px);
  border-top: var(--about-rule);
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--c-red);
}

.page-about .about-timeline__year {
  margin: 0;
  font-family: var(--f-mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-red);
  font-variant-numeric: tabular-nums;
}

.page-about .about-timeline__dash {
  padding-inline: 4px;
  color: var(--c-gold);
}

.page-about .about-timeline__title {
  margin: 0 0 10px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(18px, 2vw, 21px);
  letter-spacing: -0.01em;
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-graphite);
  max-width: 62ch;
}

/* ---------- 流程 ---------- */

.page-about .about-flowfigure {
  margin: 0 0 clamp(30px, 4.5vw, 48px);
  border: 1px solid rgba(127, 176, 201, 0.34);
  background: var(--c-ice-deep);
}

.page-about .about-flowfigure img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: 0.9;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(127, 176, 201, 0.28);
  border: 1px solid rgba(127, 176, 201, 0.28);
}

.page-about .about-flow__node {
  background: var(--c-ice);
  padding: clamp(20px, 3vw, 30px);
  position: relative;
}

.page-about .about-flow__index {
  margin: 0 0 12px;
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-about .about-flow__title {
  margin: 0 0 10px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(18px, 2vw, 21px);
  color: var(--c-paper);
  letter-spacing: -0.01em;
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 246, 248, 0.76);
}

/* ---------- 团队 ---------- */

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 60px);
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c-grid);
  border: var(--about-rule);
}

.page-about .about-team__unit {
  background: var(--c-paper);
  padding: clamp(20px, 3vw, 30px);
  border-left: 3px solid var(--c-red);
}

.page-about .about-team__count {
  margin: 0 0 10px;
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-graphite);
}

.page-about .about-team__count .num {
  color: var(--c-ice);
}

.page-about .about-team__name {
  margin: 0 0 10px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(17px, 1.9vw, 20px);
  letter-spacing: -0.01em;
}

.page-about .about-team__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-graphite);
}

/* ---------- 运营 ---------- */

.page-about .about-ops {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.page-about .about-ops__main {
  border-left: 3px solid var(--c-red);
  padding-left: clamp(18px, 3vw, 30px);
}

.page-about .about-ops__title {
  margin: 0 0 16px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: -0.01em;
}

.page-about .about-ops__text {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-graphite);
  max-width: 62ch;
}

.page-about .about-ops__text:last-child {
  margin-bottom: 0;
}

.page-about .about-ops__facts {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-grid);
  border: var(--about-rule);
}

.page-about .about-ops__fact {
  margin: 0;
  background: var(--c-frost);
  padding: 18px 16px 20px;
}

.page-about .about-ops__fact dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-graphite);
  margin-bottom: 8px;
}

.page-about .about-ops__fact dd {
  margin: 0;
  color: var(--c-ice);
  font-size: 14px;
  font-weight: 500;
}

/* ---------- 结尾行动 ---------- */

.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(24px, 4vw, 40px);
  background: var(--c-ice);
  color: var(--c-paper);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  align-items: center;
}

.page-about .about-cta__text {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.7;
  max-width: 48ch;
}

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

.page-about .about-cta .btn--ghost {
  color: var(--c-paper);
  border-color: rgba(251, 249, 245, 0.44);
}

.page-about .about-cta .btn--ghost:hover,
.page-about .about-cta .btn--ghost:focus-visible {
  border-color: var(--c-gold);
  color: var(--c-gold);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: clamp(40px, 6vw, 80px);
  }

  .page-about .about-hero__figure {
    margin-top: clamp(8px, 3vw, 40px);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-timeline__item::before {
    left: -4px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-head--sticky {
    position: sticky;
    top: clamp(96px, 12vh, 140px);
    margin-bottom: 0;
  }

  .page-about .about-ops {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1120px) {
  .page-about .about-services {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-service {
    grid-column: span 3;
  }

  .page-about .about-service--wide {
    grid-column: span 6;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 24px clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-service--wide .about-service__index {
    grid-row: 1 / span 2;
    margin: 4px 0 0;
    font-size: 28px;
  }

  .page-about .about-service--wide .about-service__title {
    grid-column: 2;
  }

  .page-about .about-service--wide .about-service__text {
    grid-column: 2;
    max-width: 78ch;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}