.page-about {
  --about-gap: 28px;
  color: var(--dawn);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-top: 26px;
  padding-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

/* ---------- 封面 ---------- */

.page-about .about-cover {
  position: relative;
  padding: 22px 0 52px;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: -60px 0 auto 0;
  height: 540px;
  background:
    radial-gradient(56% 62% at 80% 26%, rgba(200, 164, 74, .17), transparent 66%),
    radial-gradient(50% 58% at 10% 84%, rgba(90, 156, 135, .13), transparent 68%);
  pointer-events: none;
}

.page-about .about-cover__grid {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-about .about-cover__intro h1 {
  margin: 14px 0 0;
  color: var(--parchment);
  letter-spacing: -.01em;
}

.page-about .about-cover__intro .lede {
  margin-top: 18px;
  color: var(--dawn);
}

.page-about .cover-stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 22px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 18px 24px;
  border-top: 1px solid var(--line-soft);
}

.page-about .cover-stat {
  display: grid;
  gap: 7px;
  align-content: start;
}

.page-about .cover-stat .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--gold-hi);
}

.page-about .cover-stat .stat-label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-cover__figure {
  position: relative;
  margin: 40px 0 0;
}

.page-about .about-cover__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  background: var(--harbor);
}

.page-about .figure-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .07em;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .cover-stats {
    margin-top: 0;
  }

  .page-about .cover-stat {
    padding-bottom: 4px;
  }
}

/* ---------- 起点 ---------- */

.page-about .about-origin__grid {
  margin-top: 30px;
  display: grid;
  gap: 32px;
}

.page-about .about-origin__text p + p {
  margin-top: 18px;
}

.page-about .about-origin__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--harbor);
  box-shadow: var(--shadow-card);
}

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

.page-about .about-origin__figure .figure-caption {
  padding: 0 16px 14px;
}

@media (min-width: 860px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-origin__figure {
    margin-top: 6px;
  }
}

/* ---------- 时间轴 ---------- */

.page-about .tl {
  position: relative;
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 24px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-strong), var(--line-soft) 55%, transparent);
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 34px 34px;
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 4px var(--ink), 0 0 14px rgba(90, 156, 135, .7);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .tl-year {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: .05em;
  color: var(--gold);
}

.page-about .tl-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--parchment);
  transition: color .3s var(--ease);
}

.page-about .tl-text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--dawn);
}

.page-about .tl-more {
  margin: 12px 0 0;
  padding: 3px 0 3px 13px;
  max-width: 60ch;
  border-left: 2px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  transition: border-color .3s var(--ease), color .3s var(--ease), background .3s var(--ease);
}

@media (hover: hover) {
  .page-about .tl-node:hover .tl-title {
    color: var(--gold-hi);
  }

  .page-about .tl-node:hover .tl-more {
    border-left-color: var(--gold);
    color: var(--dawn);
    background: linear-gradient(90deg, rgba(200, 164, 74, .09), transparent 72%);
  }

  .page-about .tl-node:hover::before {
    background: var(--gold-hi);
    box-shadow: 0 0 0 4px var(--ink), 0 0 18px rgba(233, 206, 134, .8);
  }
}

@media (min-width: 760px) {
  .page-about .tl::before {
    left: 104px;
  }

  .page-about .tl-node {
    display: grid;
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 36px;
    padding: 0 0 44px 0;
  }

  .page-about .tl-node::before {
    left: 99px;
    top: 11px;
  }

  .page-about .tl-year {
    margin-bottom: 0;
    padding-top: 2px;
    font-size: 34px;
    text-align: right;
    color: var(--gold-hi);
  }
}

/* ---------- 内容目录 ---------- */

.page-about .about-taxonomy__map {
  margin-top: 34px;
  padding: 20px 16px 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(18, 41, 63, .78), rgba(10, 24, 38, .42));
  overflow-x: auto;
}

.page-about .about-taxonomy__map svg {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}

.page-about .map-axis {
  stroke: var(--line-soft);
  stroke-width: 1;
}

.page-about .map-leaf {
  stroke: var(--line-soft);
  stroke-width: 1;
}

.page-about .map-node {
  fill: rgba(18, 41, 63, .96);
  stroke: var(--gold);
  stroke-width: 1.4;
}

.page-about .map-dot {
  fill: var(--celadon);
}

.page-about .about-taxonomy__grid {
  margin-top: 34px;
  display: grid;
  gap: 32px;
}

.page-about .tax-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .tax-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 12px 18px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background .3s var(--ease);
}

.page-about .tax-index {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .tax-name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--parchment);
}

.page-about .tax-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

@media (hover: hover) {
  .page-about .tax-item:hover {
    background: linear-gradient(90deg, rgba(200, 164, 74, .08), transparent 74%);
  }
}

.page-about .about-taxonomy__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: radial-gradient(80% 70% at 30% 18%, rgba(90, 156, 135, .16), rgba(10, 24, 38, .92));
}

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

.page-about .about-taxonomy__figure .figure-caption {
  padding: 0 16px 14px;
}

@media (min-width: 900px) {
  .page-about .about-taxonomy__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }
}

/* ---------- 职能分工 ---------- */

.page-about .duty-grid {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .duty-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  border: 1px solid var(--line-soft);
}

.page-about .duty-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .duty-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--parchment);
}

.page-about .duty-desc {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .duty-tag {
  align-self: flex-start;
  margin-top: 4px;
}

.page-about .about-team__note {
  margin: 30px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  max-width: 76ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

@media (min-width: 640px) {
  .page-about .duty-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .duty-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- 服务与备案（羊皮纸） ---------- */

.page-about .about-assurance__paper {
  margin-top: 32px;
  padding: 30px 24px;
  border: 1px solid rgba(27, 21, 18, .16);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
}

.page-about .about-assurance__paper p + p {
  margin-top: 16px;
}

.page-about .assure-facts {
  margin: 26px 0 0;
  padding-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px 28px;
  border-top: 1px solid rgba(27, 21, 18, .16);
}

.page-about .assure-fact dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(27, 21, 18, .58);
}

.page-about .assure-fact dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--sepia);
}

@media (min-width: 620px) {
  .page-about .about-assurance__paper {
    padding: 36px 34px;
  }

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

/* ---------- 出口 ---------- */

.page-about .next-grid {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 24px;
  border: 1px solid var(--line-soft);
}

.page-about .next-card .card-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--celadon);
}

.page-about .next-card .card-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--parchment);
}

.page-about .next-card p {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .next-card .btn {
  align-self: flex-start;
  margin-top: 4px;
}

.page-about .about-next__more {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-next__more a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-next__more a:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

.page-about .about-next {
  padding-bottom: 76px;
}

@media (min-width: 780px) {
  .page-about .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}