.page-about {
  --about-rail-w: 120px;
  --about-gap: 40px;
  --about-line: rgba(200, 162, 76, .38);
  --about-line-soft: rgba(100, 117, 127, .18);
  color: var(--ink);
}

.page-about [id^="era-"] {
  scroll-margin-top: calc(var(--header-h) + 32px);
}

/* ---------- 首屏 ---------- */

.page-about .about-intro {
  padding-top: 8px;
  padding-bottom: 24px;
}

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-about .about-intro__kicker {
  margin: 0 0 16px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-intro__title {
  margin: 0 0 22px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(30px, 7.2vw, 62px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-intro__lede {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.8;
  color: #223243;
  max-width: 62ch;
}

.page-about .about-intro__note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 58ch;
}

.page-about .about-intro__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(230, 200, 126, .28);
  border: 1px solid var(--about-line);
  border-radius: 3px;
  overflow: hidden;
  box-shadow: var(--shadow-paper);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 18px;
  background: var(--royal);
}

.page-about .about-figure__num {
  font-family: var(--mono);
  font-size: clamp(28px, 7vw, 40px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold-light);
}

.page-about .about-figure__label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(250, 246, 236, .74);
}

/* ---------- 沿革 ---------- */

.page-about .about-history {
  padding-top: 56px;
}

.page-about .about-history__head {
  max-width: 62ch;
  margin-bottom: 44px;
}

.page-about .about-history__title,
.page-about .about-team__title,
.page-about .about-cred__title,
.page-about .about-network__title,
.page-about .about-principles__title,
.page-about .about-cta__title {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-history__sub,
.page-about .about-cred__sub,
.page-about .about-network__sub,
.page-about .about-principles__sub {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate);
}

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

.page-about .about-rail {
  border-top: 2px solid var(--gold);
  padding-top: 14px;
}

.page-about .about-rail__cap {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--slate);
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__link {
  display: block;
  padding: 6px 12px;
  border: 1px solid var(--about-line);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .04em;
  text-decoration: none;
  color: var(--royal);
  background: var(--sheet);
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--ink);
  background: var(--gold-light);
  border-color: var(--gold);
}

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

.page-about .era-card {
  position: relative;
  margin: 0 0 26px;
  padding: 26px 22px 24px;
  background: var(--paper);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--gold);
  border-radius: 2px;
  box-shadow: var(--shadow-paper);
}

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

.page-about .era-card__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 12px;
}

.page-about .era-card__year {
  font-family: var(--mono);
  font-size: clamp(34px, 9vw, 52px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--royal);
}

.page-about .era-card__tag {
  transform: rotate(-2.5deg);
}

.page-about .era-card__title {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(19px, 3.4vw, 24px);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .era-card__body {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #2a3a4a;
}

.page-about .era-card__link {
  color: var(--royal);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

.page-about .era-card__figure {
  margin: 22px 0 0;
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding-top: 64px;
}

.page-about .about-team__grid {
  align-items: start;
  gap: 36px;
}

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

.page-about .about-team__kicker {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .about-team__body {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: #2a3a4a;
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 24px 0 0;
  padding: 1px 0 0;
  background: var(--about-line-soft);
  border-top: 2px solid var(--gold);
  list-style: none;
}

.page-about .team-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--paper);
}

.page-about .team-stats__label {
  margin: 0;
  font-size: 13px;
  color: var(--slate);
}

.page-about .team-stats__value {
  margin: 0;
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--royal);
}

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

/* ---------- 资质 ---------- */

.page-about .about-cred {
  padding-top: 64px;
}

.page-about .about-cred__head {
  max-width: 62ch;
  margin-bottom: 34px;
}

.page-about .cred-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .cred-card {
  position: relative;
  padding: 30px 24px 24px;
  background: var(--royal);
  border: 1px solid rgba(230, 200, 126, .28);
  border-radius: 3px;
  outline: none;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.page-about .cred-card:hover,
.page-about .cred-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--gold);
  box-shadow: 0 22px 44px rgba(12, 27, 42, .22);
}

.page-about .cred-card__seal {
  position: absolute;
  top: 18px;
  right: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(230, 200, 126, .5);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gold-light);
}

.page-about .cred-card__seal--alt {
  border-color: rgba(250, 246, 236, .35);
  color: var(--paper);
}

.page-about .cred-card__title {
  margin: 0 68px 12px 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .cred-card__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(250, 246, 236, .78);
}

.page-about .cred-card__detail {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height .35s ease, opacity .3s ease, margin-top .35s ease;
}

.page-about .cred-card__detail p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid rgba(230, 200, 126, .3);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(230, 200, 126, .95);
}

.page-about .cred-card:hover .cred-card__detail,
.page-about .cred-card:focus-visible .cred-card__detail {
  max-height: 220px;
  opacity: 1;
  margin-top: 16px;
}

@media (hover: none) {
  .page-about .cred-card__detail {
    max-height: 220px;
    opacity: 1;
    margin-top: 16px;
  }
}

/* ---------- 服务网点 ---------- */

.page-about .about-network {
  padding-top: 64px;
}

.page-about .about-network__head {
  max-width: 62ch;
  margin-bottom: 34px;
}

.page-about .about-network__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-network__regions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
  align-content: start;
}

.page-about .region {
  padding-top: 12px;
  border-top: 1px solid var(--about-line);
}

.page-about .region__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .region__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .region__city {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--sheet);
  border: 1px solid var(--about-line-soft);
  border-radius: 2px;
  font-size: 15px;
  color: var(--ink);
}

.page-about .region__city--home {
  background: var(--royal);
  border-color: var(--gold);
  color: var(--paper);
}

.page-about .region__badge {
  padding: 1px 6px;
  border-radius: 2px;
  background: var(--gold);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-network__side {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}

.page-about .visit-note {
  padding: 24px 22px;
  background: var(--sheet);
  border: 1px solid var(--about-line-soft);
  border-left: 4px solid var(--teal);
  border-radius: 2px;
}

.page-about .visit-note__title {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .visit-note__body {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: #2a3a4a;
}

.page-about .visit-note__body--strong {
  margin-bottom: 18px;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  color: var(--royal);
  font-weight: 500;
}

.page-about .visit-note__btn {
  display: inline-block;
}

/* ---------- 原则 ---------- */

.page-about .about-principles {
  padding-top: 64px;
}

.page-about .about-principles__head {
  max-width: 62ch;
  margin-bottom: 34px;
}

.page-about .principle-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .principle {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 4px 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .principle__num {
  grid-row: span 2;
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--gold);
}

.page-about .principle__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(18px, 3.2vw, 22px);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .principle__body {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #2a3a4a;
}

.page-about .principle__link {
  color: var(--royal);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

/* ---------- 尾段 ---------- */

.page-about .about-cta {
  padding-top: 64px;
  padding-bottom: 72px;
}

.page-about .about-cta__panel {
  position: relative;
  padding: 34px 24px;
  background: var(--ink);
  border-radius: 3px;
  overflow: hidden;
}

.page-about .about-cta__panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(200, 162, 76, 0) 78%);
}

.page-about .about-cta__title {
  color: var(--paper);
}

.page-about .about-cta__body {
  margin: 0 0 24px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(250, 246, 236, .76);
}

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

/* ---------- 图片通用 ---------- */

.page-about .image-frame {
  margin: 0;
}

.page-about .image-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-line-soft);
  border-radius: 2px;
  background: var(--sheet);
}

.page-about .image-frame__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 720px) {
  .page-about .about-intro__figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .page-about .principle {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  .page-about .principle__num {
    font-size: 38px;
  }

  .page-about .about-cta__panel {
    padding: 44px 40px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 1000px) {
  .page-about .about-intro {
    padding-top: 24px;
  }

  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-history__layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    border-top: none;
    border-left: 2px solid var(--gold);
    padding-top: 0;
    padding-left: 18px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
    position: relative;
  }

  .page-about .about-rail__link {
    padding: 10px 0;
    border: none;
    background: none;
    font-size: 15px;
    color: var(--slate);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: none;
    color: var(--royal);
  }

  .page-about .about-rail__item {
    position: relative;
  }

  .page-about .about-rail__item::before {
    content: "";
    position: absolute;
    left: -23px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--paper);
    border: 2px solid var(--gold);
    transition: background-color .2s ease, transform .2s ease;
  }

  .page-about .about-rail__item:hover::before {
    background: var(--gold-light);
    transform: translateY(-50%) scale(1.25);
  }

  .page-about .about-team__grid {
    gap: 56px;
  }

  .page-about .about-network__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-network__regions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px 24px;
  }

  .page-about .era-card {
    padding: 34px 34px 30px;
  }

  .page-about .principle-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
  }

  .page-about .about-cta__panel {
    padding: 56px 56px 52px;
  }
}

/* ---------- 大屏 ---------- */

@media (min-width: 1280px) {
  .page-about .about-intro__grid {
    gap: 84px;
  }

  .page-about .about-intro__figures {
    transform: translateY(8px);
  }
}

/* ---------- 减少动态 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .cred-card,
  .page-about .cred-card__detail,
  .page-about .about-rail__link,
  .page-about .about-rail__item::before {
    transition: none;
  }

  .page-about .cred-card:hover,
  .page-about .cred-card:focus-visible {
    transform: none;
  }

  .page-about .about-intro__figures {
    transform: none;
  }
}