.page-about {
  --about-grid-line: rgba(27, 58, 147, 0.045);
  background: var(--hb-paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--hb-header-h) + 36px) 0 64px;
  background: var(--hb-paper);
  isolation: isolate;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -24%;
  bottom: -24%;
  left: 58%;
  width: 80%;
  background: linear-gradient(155deg, var(--hb-navy) 0%, var(--hb-navy-deep) 82%);
  border-radius: 46% 0 0 14% / 24% 0 0 10%;
  transform: rotate(-2.2deg);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumbs {
  margin-bottom: 26px;
}

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

.page-about .about-hero__copy .hb-display {
  max-width: 15em;
  margin: 10px 0 20px;
}

.page-about .about-hero__copy .hb-lede {
  max-width: 34em;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 22px 40px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--hb-hair);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 104px;
}

.page-about .about-fact__value {
  font-size: 25px;
  line-height: 1.1;
  color: var(--hb-navy);
}

.page-about .about-fact__label {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--hb-muted);
}

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

.page-about .about-hero__figure .hb-figure__frame {
  aspect-ratio: 3 / 2;
  box-shadow: var(--hb-shadow-2);
}

.page-about .hb-figure__frame {
  overflow: hidden;
  border-radius: var(--hb-r-md);
}

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

.page-about .hb-figure__cap {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--hb-muted);
}

/* ---------- 章节标题 ---------- */
.page-about .about-section {
  position: relative;
}

.page-about .about-head {
  max-width: 620px;
  margin-bottom: 40px;
}

.page-about .about-head--end {
  margin-left: auto;
}

.page-about .about-head--flush {
  margin-bottom: 32px;
}

.page-about .about-head__text {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--hb-muted);
}

/* ---------- 岗位卡 ---------- */
.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-role {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 22px;
  background: var(--hb-card);
  border-radius: var(--hb-r-md);
  box-shadow: var(--hb-shadow-1);
  transition: transform var(--hb-dur) var(--hb-ease), box-shadow var(--hb-dur) var(--hb-ease);
}

.page-about .about-role__no {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--hb-muted);
}

.page-about .about-role__no::after {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  margin-top: 9px;
  background: var(--hb-gold);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--hb-ink);
}

.page-about .about-role__duties {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .about-role__duties li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--hb-muted);
}

.page-about .about-role__duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 1px;
  background: var(--hb-gold);
}

.page-about .about-role__tag {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 6px;
}

/* ---------- 转场引语 ---------- */
.page-about .about-quote {
  padding: 62px 0;
  background: var(--hb-paper);
}

.page-about .about-quote__text {
  max-width: 720px;
  margin: 0;
  padding-left: 26px;
  border-left: 3px solid var(--hb-gold);
  font-family: var(--hb-font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 3.4vw, 1.7rem);
  line-height: 1.62;
  letter-spacing: -0.005em;
  color: var(--hb-navy-deep);
}

/* ---------- 时间带 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 8px 0 8px 30px;
  list-style: none;
  display: grid;
  gap: 34px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--hb-gold), rgba(200, 154, 60, 0.12));
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--hb-gold);
  box-shadow: 0 0 0 5px var(--hb-gold-soft);
}

.page-about .about-node__stage {
  display: block;
  margin-bottom: 6px;
  font-family: var(--hb-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hb-blue-mid);
}

.page-about .about-node__name {
  display: block;
  font-family: var(--hb-font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  color: var(--hb-navy-deep);
}

.page-about .about-history__note {
  max-width: 780px;
  margin-top: 44px;
}

.page-about .about-history__note p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--hb-ink);
}

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

/* ---------- 编目流程 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

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

.page-about .about-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--hb-hair);
}

.page-about .about-step:first-child {
  border-top: 1px solid var(--hb-hair);
}

.page-about .about-step__no {
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--hb-gold);
  padding-top: 4px;
}

.page-about .about-step__body .hb-h3 {
  margin: 0 0 8px;
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hb-muted);
}

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

.page-about .about-fig--square .hb-figure__frame {
  aspect-ratio: 1 / 1;
  box-shadow: var(--hb-shadow-1);
}

.page-about .about-fig--map .hb-figure__frame {
  aspect-ratio: 10 / 7;
  box-shadow: var(--hb-shadow-1);
}

/* ---------- 服务范围 ---------- */
.page-about .about-scenes {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 22px;
}

.page-about .about-scene {
  position: relative;
  padding-left: 20px;
  border-left: 2px solid var(--hb-blue-mist);
  transition: border-color var(--hb-dur) var(--hb-ease);
}

.page-about .about-scene:hover,
.page-about .about-scene:focus-within {
  border-left-color: var(--hb-red);
}

.page-about .about-scene .hb-h3 {
  margin: 0 0 8px;
}

.page-about .about-scene p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hb-muted);
}

/* ---------- 属地与备案 ---------- */
.page-about .about-records {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--hb-hair);
}

.page-about .about-record {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: 8px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--hb-hair);
}

.page-about .about-record dt {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--hb-muted);
}

.page-about .about-record dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--hb-ink);
}

.page-about .about-record__mono {
  font-family: var(--hb-font-mono);
  letter-spacing: 0.05em;
  color: var(--hb-navy-deep);
}

/* ---------- 延伸入口 ---------- */
.page-about .about-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  padding: 30px 26px;
  background: linear-gradient(120deg, var(--hb-blue-mist) 0%, var(--hb-card) 78%);
  border-radius: var(--hb-r-lg);
  border-left: 4px solid var(--hb-gold);
}

.page-about .about-band__text {
  margin: 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--hb-ink);
}

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

/* ---------- 平板及以上 ---------- */
@media (min-width: 680px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 24px;
  }

  .page-about .about-role:nth-child(even) {
    margin-top: 36px;
  }

  .page-about .about-records {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-about .about-band {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    padding: 34px 34px;
  }

  .page-about .about-band__links {
    justify-content: flex-end;
  }
}

@media (min-width: 760px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    padding: 48px 0 0;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 21px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--hb-gold) 10%, var(--hb-gold) 90%, transparent);
  }

  .page-about .about-node::before {
    left: 0;
    top: -35px;
    width: 16px;
    height: 16px;
    box-shadow: 0 0 0 6px var(--hb-gold-soft);
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--hb-header-h) + 66px) 0 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-split {
    gap: 64px;
  }

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

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

  .page-about .about-split--a .about-catalog {
    padding-right: 8px;
  }
}

/* ---------- 窄屏收束 ---------- */
@media (max-width: 899px) {
  .page-about .about-hero {
    background: linear-gradient(180deg, var(--hb-blue-mist) 0%, var(--hb-paper) 52%);
  }

  .page-about .about-hero::after {
    display: none;
  }
}

@media (max-width: 560px) {
  .page-about .about-quote__text {
    padding-left: 18px;
    border-left-width: 2px;
  }

  .page-about .about-record {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-about .about-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-about .about-band {
    padding: 26px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-scene {
    transition: none;
  }
}