.page-about {
  --about-index-w: 236px;
  --about-gap: clamp(20px, 3vw, 40px);
  --about-pad: clamp(18px, 2.6vw, 32px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .shell {
  padding-inline: var(--gutter);
}

.page-about .breadcrumbs {
  margin-top: clamp(12px, 2vw, 22px);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(14px, 2.4vw, 28px);
  padding: var(--about-pad);
  background:
    radial-gradient(120% 150% at 88% -10%, rgba(75, 58, 120, .42), rgba(10, 12, 16, 0) 62%),
    linear-gradient(180deg, rgba(233, 162, 59, .10), rgba(20, 24, 33, 0) 220px),
    var(--rock);
  border: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: min(46%, 320px);
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-hi) 55%, var(--jade));
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 26px;
  height: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  pointer-events: none;
}

.page-about .about-hero__text {
  max-width: 62ch;
}

.page-about .page-title {
  margin: 10px 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ink-strong);
}

.page-about .page-lede {
  max-width: 58ch;
  color: var(--muted);
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 速览数字 ---------- */
.page-about .glance {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  align-self: start;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .glance__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--obsidian);
}

.page-about .glance__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  color: var(--gold);
}

.page-about .glance__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 索引 + 资料卡两栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(28px, 4.4vw, 56px);
}

.page-about .about-index {
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--duration) var(--ease), border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ink-strong);
  border-color: var(--gold);
  background: rgba(233, 162, 59, .08);
}

.page-about .about-index__no {
  font-size: 12px;
  color: var(--gold);
}

.page-about .about-index__meta {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 资料卡 ---------- */
.page-about .about-card {
  position: relative;
  margin-bottom: clamp(18px, 2.8vw, 32px);
  padding: var(--about-pad);
  background:
    linear-gradient(180deg, rgba(233, 162, 59, .09), rgba(20, 24, 33, 0) 130px),
    var(--rock);
  clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, var(--chamfer) 100%, 0 calc(100% - var(--chamfer)));
  scroll-margin-top: 96px;
}

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

.page-about .about-card--indigo {
  background:
    linear-gradient(180deg, rgba(75, 58, 120, .38), rgba(20, 24, 33, 0) 190px),
    var(--rock);
}

.page-about .about-card--gold {
  background:
    linear-gradient(180deg, rgba(233, 162, 59, .16), rgba(20, 24, 33, 0) 180px),
    var(--rock);
}

.page-about .about-block__tab {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-block__title {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.5vw, 28px);
  line-height: 1.35;
  letter-spacing: .01em;
  color: var(--ink-strong);
}

.page-about .about-block__note {
  max-width: 64ch;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- 图像 ---------- */
.page-about .about-media {
  margin-top: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line-soft);
}

.page-about .about-media--narrow {
  max-width: 720px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--jade) 58%, rgba(53, 201, 164, 0));
}

.page-about .about-node {
  position: relative;
  margin-bottom: 10px;
  padding-left: 32px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 0;
  width: 13px;
  height: 13px;
  background: var(--obsidian);
  border: 2px solid var(--jade);
  transform: rotate(45deg);
}

.page-about .about-node__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  cursor: pointer;
  list-style: none;
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.page-about .about-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__summary:hover,
.page-about .about-node__summary:focus-visible {
  border-color: var(--gold);
  background: rgba(233, 162, 59, .06);
}

.page-about .about-node__year {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .about-node__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink-strong);
}

.page-about .about-node__body {
  padding: 10px 12px 14px;
  border: 1px solid var(--line-soft);
  border-top: 0;
  background: var(--iron);
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .team-card {
  padding: 16px 18px 18px;
  background: var(--iron);
  border-top: 2px solid var(--iron-2);
  transition: background var(--duration) var(--ease), border-color var(--duration) var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within,
.page-about .team-card:focus-visible {
  background: var(--iron-2);
  border-top-color: var(--gold);
  outline: none;
}

.page-about .team-card__num {
  display: block;
  font-size: clamp(26px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-hi);
}

.page-about .team-card__role {
  margin: 8px 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16.5px;
  color: var(--ink-strong);
}

.page-about .team-card__brief {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .team-card__detail {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}

.page-about .team-card:hover .team-card__detail,
.page-about .team-card:focus-within .team-card__detail {
  opacity: 1;
}

/* ---------- 运营与服务 ---------- */
.page-about .ops-table {
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-about .ops-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 15px 0;
  border-top: 1px dashed var(--line);
}

.page-about .ops-row:last-child {
  border-bottom: 1px dashed var(--line);
}

.page-about .ops-row__k {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .ops-row__v {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: center;
  margin-top: clamp(16px, 2.4vw, 26px);
}

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

.page-about .eco-list li {
  display: grid;
  gap: 6px 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .eco-list li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .eco-list__num {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold);
}

.page-about .eco-list__label {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 贵州落地 ---------- */
.page-about .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(16px, 2.4vw, 26px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .contact-cell {
  padding: 16px 18px;
  background: var(--obsidian);
}

.page-about .contact-cell__k {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .contact-cell__v {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .eco-list li {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

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

  .page-about .ops-row {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 0 20px;
  }

  .page-about .eco-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .86fr);
  }
}

@media (min-width: 1000px) {
  .page-about .about-split {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-index__link {
    justify-content: flex-start;
    width: 100%;
    border-color: transparent;
    border-left: 2px solid transparent;
  }
}

@media (min-width: 1240px) {
  .page-about .glance {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 619px) {
  .page-about .team-card__detail {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card__detail,
  .page-about .about-index__link,
  .page-about .about-node__summary,
  .page-about .team-card {
    transition: none;
  }
}