/* ===== 品牌历程页面 · 档案馆式纵向时间线 ===== */
.page-about {
  --about-rail: 148px;
  --tl-pad: clamp(20px, 3vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 8%;
  right: -12%;
  width: min(52vw, 520px);
  aspect-ratio: 1;
  background: var(--green);
  opacity: 0.16;
  transform: rotate(14deg);
  pointer-events: none;
}

.page-about .about-hero .breadcrumbs {
  position: relative;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero__text .lede {
  margin-top: 18px;
}

.page-about .about-hero__meta {
  margin: 0;
  padding-left: 18px;
  border-left: var(--edge) solid var(--champagne);
  display: grid;
  gap: 14px;
}

.page-about .about-hero__meta-row {
  display: grid;
  gap: 3px;
}

.page-about .about-hero__meta dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--champagne);
}

.page-about .about-hero__meta dd {
  margin: 0;
  font-size: var(--fs-16);
  color: var(--marble);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__figure {
  position: relative;
  margin: clamp(32px, 5vw, 56px) 0 0;
}

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

/* ---------- 起点 ---------- */
.page-about .origin__grid {
  margin-top: clamp(22px, 3.4vw, 40px);
  align-items: start;
}

.page-about .origin__copy p {
  margin: 0 0 18px;
}

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

.page-about .origin__note {
  align-self: start;
}

.page-about .origin__note-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-about .origin__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .origin__list li {
  position: relative;
  padding: 2px 0 2px 16px;
  border-left: var(--edge) solid var(--green);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .timeline__rail {
  min-width: 0;
}

.page-about .timeline__rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .timeline__rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  border: var(--edge) solid var(--black);
  background: var(--ivory);
  color: var(--black);
  text-decoration: none;
  white-space: nowrap;
  font-size: var(--fs-14);
  transition: transform 180ms ease-out, background-color 180ms ease-out, box-shadow 180ms ease-out;
}

.page-about .timeline__rail-year {
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  font-weight: 700;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__rail-label {
  color: var(--muted);
}

.page-about .timeline__rail-link:hover,
.page-about .timeline__rail-link:focus-visible {
  background: var(--champagne);
  transform: translate(-2px, -2px);
  box-shadow: var(--hard-shadow-sm);
}

.page-about .timeline__rail-link:focus-visible {
  outline: 2px solid var(--gold-deep);
  outline-offset: 2px;
}

.page-about .timeline__stream {
  position: relative;
  display: grid;
  gap: clamp(26px, 3.6vw, 52px);
  padding-left: var(--tl-pad);
  min-width: 0;
}

.page-about .timeline__stream::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--green) 0%, var(--green) 33%, var(--marble) 33%, var(--marble) 36%, var(--champagne) 36%, var(--champagne) 66%, var(--marble) 66%, var(--marble) 69%, var(--red) 69%, var(--red) 100%);
}

.page-about .phase {
  position: relative;
  background: var(--ivory);
  border: var(--edge) solid var(--black);
  box-shadow: var(--hard-shadow);
  padding: clamp(22px, 3vw, 34px);
  scroll-margin-top: 96px;
}

.page-about .phase::before {
  content: "";
  position: absolute;
  top: 30px;
  left: calc(-1 * var(--tl-pad) - 8px);
  width: 14px;
  height: 14px;
  background: var(--marble);
  border: var(--edge) solid var(--black);
  border-radius: 50%;
}

.page-about .phase__year {
  position: absolute;
  top: 4px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--black);
  opacity: 0.09;
  pointer-events: none;
  user-select: none;
  font-variant-numeric: tabular-nums;
}

.page-about .phase__plate {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  padding: 6px 12px;
  border: var(--edge) solid var(--black);
  background: var(--black);
  color: var(--champagne);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.page-about .phase--green .phase__plate {
  background: var(--green);
  color: var(--ivory);
  border-color: var(--black);
}

.page-about .phase--red .phase__plate {
  background: var(--red);
  color: var(--ivory);
}

.page-about .phase--wine .phase__plate {
  background: var(--wine);
  color: var(--marble);
}

.page-about .phase--forest .phase__plate {
  background: var(--forest);
  color: var(--champagne);
}

.page-about .phase--indigo .phase__plate {
  background: var(--indigo);
  color: var(--champagne);
}

.page-about .phase__stage {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
}

.page-about .phase__title {
  position: relative;
  z-index: 1;
  margin: 0 0 14px;
  padding-right: 78px;
}

.page-about .phase p {
  margin: 0 0 14px;
}

.page-about .phase__points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .phase__points li {
  position: relative;
  padding-left: 18px;
  color: var(--muted);
}

.page-about .phase__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--green);
}

.page-about .phase__body {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
  align-items: start;
}

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

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

/* ---------- 客户经理团队 ---------- */
.page-about .team__grid {
  margin-top: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .team-map {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .team-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 112px;
  padding: 16px 18px;
  border: var(--edge) solid var(--champagne);
  background: rgba(255, 255, 255, 0.05);
  transition: transform 180ms ease-out, background-color 180ms ease-out, border-color 180ms ease-out;
}

.page-about .team-cell:hover {
  transform: translateY(-4px);
  background: rgba(200, 176, 122, 0.16);
  border-color: var(--marble);
}

.page-about .team-cell__name {
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--champagne);
  letter-spacing: 0.02em;
}

.page-about .team-cell__desc {
  font-size: var(--fs-14);
  color: var(--marble);
  opacity: 0.82;
  line-height: 1.7;
}

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

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

/* ---------- 会员规模与续期 ---------- */
.page-about .proof__grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .proof-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 32px);
  border: var(--edge) solid var(--black);
  background: var(--ivory);
  box-shadow: var(--hard-shadow-sm);
}

.page-about .proof-item--key {
  background: var(--marble);
}

.page-about .proof-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(38px, 6.4vw, 66px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--black);
  font-variant-numeric: tabular-nums;
}

.page-about .proof-item--key .proof-value {
  color: var(--green);
}

.page-about .proof-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-about .proof-note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 服务地区与备案 ---------- */
.page-about .coverage__grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .coverage-card {
  padding: clamp(22px, 3vw, 32px);
  border: var(--edge) solid var(--champagne);
  background: rgba(11, 11, 12, 0.34);
}

.page-about .coverage-card__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--champagne);
}

.page-about .coverage-card__value {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--marble);
}

.page-about .coverage-card__value--code {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.6vw, 26px);
  letter-spacing: 0.06em;
}

.page-about .coverage-card__text {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--marble);
  opacity: 0.86;
}

.page-about .coverage-facts {
  display: grid;
  gap: 0;
  margin: clamp(24px, 4vw, 40px) 0 0;
  border-top: var(--edge) solid var(--champagne);
}

.page-about .coverage-fact {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(200, 176, 122, 0.36);
}

.page-about .coverage-fact dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--champagne);
}

.page-about .coverage-fact dd {
  margin: 0;
  font-size: var(--fs-16);
  color: var(--marble);
  font-variant-numeric: tabular-nums;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
}

.page-about .about-cta .lede {
  margin-top: 18px;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-content: start;
}

.page-about .about-cta__links .link-more {
  flex-basis: 100%;
}

.page-about .about-cta__note {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(200, 176, 122, 0.4);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  line-height: 1.9;
  color: var(--champagne);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .proof__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .proof-item--key {
    grid-row: span 2;
  }
}

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

  .page-about .timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .timeline__rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .timeline__rail-list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .timeline__rail-link {
    width: 100%;
    justify-content: space-between;
  }

  .page-about .phase__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
  }

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

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

  .page-about .coverage-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 1100px) {
  .page-about .proof__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .proof-item--key {
    grid-row: auto;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__rail-link,
  .page-about .team-cell {
    transition-duration: 150ms;
  }

  .page-about .timeline__rail-link:hover,
  .page-about .team-cell:hover {
    transform: none;
  }
}