.page-about {
  --about-gap: 22px;
  --about-line: rgba(169, 180, 196, .18);
  background: var(--ink-950);
  color: var(--soft);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: 14px;
  padding-bottom: 4px;
}

.page-about .crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .82rem;
}

.page-about .crumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--slate-300);
  opacity: .6;
}

.page-about .crumb-list .crumb {
  color: var(--slate-300);
  text-decoration: none;
}

.page-about .crumb-list a.crumb:hover {
  color: var(--electric-500);
}

.page-about .crumb-list [aria-current="page"] {
  color: var(--soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-head {
  padding-block: 22px 4px;
}

.page-about .about-head-grid {
  display: grid;
  gap: 26px;
}

.page-about .about-head-main .display {
  margin: 12px 0 14px;
  max-width: 22ch;
}

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

.page-about .about-head-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--about-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-facts .fact {
  background: var(--ink-800);
  padding: 14px 16px;
}

.page-about .about-facts dt {
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--slate-300);
}

.page-about .about-facts dd {
  margin: 6px 0 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper-50);
}

.page-about .about-facts .num {
  color: var(--lime-400);
  font-size: 1.18rem;
}

.page-about .about-head-aside .col-note {
  margin-top: 14px;
}

/* ---------- 通用文字 ---------- */
.page-about .about-p {
  max-width: 64ch;
  margin: 12px 0 0;
  color: var(--soft);
  font-size: 1rem;
  line-height: 1.78;
}

.page-about .sub-title {
  margin: 26px 0 0;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--lime-400);
}

.page-about .aside-title {
  margin: 0 0 10px;
  font-size: .98rem;
  font-weight: 700;
  color: var(--paper-50);
}

.page-about .col-note {
  display: block;
  margin: 10px 0 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--slate-300);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl-panel {
  padding: 26px 18px 32px;
  border-radius: var(--r-lg);
}

.page-about .about-tl-head .section-title {
  margin: 10px 0 0;
  max-width: 24ch;
}

.page-about .about-tl-fig {
  margin: 24px 0 6px;
}

.page-about .about-tl-fig img,
.page-about .about-flow-fig img,
.page-about .about-local-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-tl-grid {
  margin-top: 24px;
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 6px 0 0 26px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--lime-400), var(--electric-500) 55%, var(--orange-500));
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .tl-node {
  position: absolute;
  left: -26px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 2px solid var(--lime-400);
  box-shadow: 0 0 0 4px rgba(182, 240, 74, .12);
}

.page-about .tl-item:nth-child(2n) .tl-node {
  border-color: var(--electric-500);
  box-shadow: 0 0 0 4px rgba(43, 210, 255, .12);
}

.page-about .tl-item:nth-child(3n) .tl-node {
  border-color: var(--orange-500);
  box-shadow: 0 0 0 4px rgba(255, 122, 41, .12);
}

.page-about .tl-item.is-current .tl-node {
  background: var(--lime-400);
  border-color: var(--lime-400);
  box-shadow: 0 0 0 6px rgba(182, 240, 74, .2);
}

.page-about .tl-card {
  background: rgba(11, 18, 32, .42);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  padding: 16px 18px;
}

.page-about .tl-era {
  margin: 0 0 8px;
}

.page-about .tl-title {
  margin: 0;
  font-size: 1.04rem;
  line-height: 1.5;
  font-weight: 800;
  color: var(--paper-50);
}

.page-about .tl-text {
  margin: 8px 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--soft);
}

.page-about .about-tl-aside {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--about-line);
}

.page-about .metric-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(11, 18, 32, .5);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
}

.page-about .metric-num {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--lime-400);
}

.page-about .metric:nth-child(2) .metric-num {
  color: var(--electric-500);
}

.page-about .metric:nth-child(3) .metric-num {
  color: var(--orange-500);
}

.page-about .metric-label {
  font-size: .84rem;
  line-height: 1.6;
  color: var(--slate-300);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  align-items: start;
}

.page-about .role-grid {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .role-card {
  background: var(--ink-800);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .role-card > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .role-card > summary::-webkit-details-marker {
  display: none;
}

.page-about .role-card > summary::after {
  content: "";
  width: 9px;
  height: 9px;
  margin-left: auto;
  border-right: 2px solid var(--lime-400);
  border-bottom: 2px solid var(--lime-400);
  transform: rotate(45deg);
  transition: transform var(--dur) ease;
}

.page-about .role-card[open] > summary::after {
  transform: rotate(-135deg);
}

.page-about .role-card[open] > summary {
  background: rgba(182, 240, 74, .07);
}

.page-about .role-idx {
  font-size: .82rem;
  color: var(--slate-300);
}

.page-about .role-name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--paper-50);
}

.page-about .role-body {
  padding: 0 18px 18px;
}

.page-about .role-count {
  margin: 0 0 10px;
  font-size: .84rem;
  color: var(--lime-400);
  font-weight: 700;
}

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

.page-about .role-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--soft);
}

.page-about .role-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric-500);
}

.page-about .about-team-aside {
  margin-top: 28px;
  padding: 20px;
  background: var(--ink-800);
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
}

.page-about .about-team-aside .btn {
  margin-top: 16px;
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow-panel {
  padding: 26px 18px 32px;
  border-radius: var(--r-lg);
}

.page-about .about-flow-grid {
  display: grid;
  gap: 26px;
}

.page-about .arc-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .arc-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px 12px 16px;
  background: rgba(11, 18, 32, .38);
  border-radius: var(--r-sm);
  border-left: 3px solid var(--lime-400);
}

.page-about .arc-item--electric {
  border-left-color: var(--electric-500);
}

.page-about .arc-item--orange {
  border-left-color: var(--orange-500);
}

.page-about .arc-key {
  font-size: .94rem;
  font-weight: 800;
  color: var(--paper-50);
}

.page-about .arc-desc {
  font-size: .86rem;
  line-height: 1.7;
  color: var(--slate-300);
}

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

/* ---------- 版本迭代 ---------- */
.page-about .about-ver-panel {
  padding: 26px 18px 32px;
  border-radius: var(--r-lg);
}

.page-about .about-ver-grid {
  align-items: start;
}

.page-about .about-ver-panel .btn {
  margin-top: 18px;
}

.page-about .about-ver-aside {
  margin-top: 26px;
}

.page-about .ver-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: rgba(245, 247, 242, .18);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ver-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(107, 30, 58, .55);
}

.page-about .ver-num {
  font-size: 1.16rem;
  font-weight: 800;
  color: var(--lime-400);
}

.page-about .ver-text {
  font-size: .84rem;
  line-height: 1.65;
  color: var(--soft);
}

/* ---------- 服务标准 ---------- */
.page-about .about-svc-panel {
  padding: 26px 18px 32px;
  border-radius: var(--r-lg);
}

.page-about .about-svc-panel .eyebrow {
  color: var(--teal-700);
}

.page-about .about-svc-panel .section-title {
  color: var(--ink-900);
}

.page-about .about-svc-panel .about-p {
  color: rgba(16, 24, 40, .78);
}

.page-about .about-svc-grid {
  display: grid;
  gap: 26px;
}

.page-about .svc-list {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .svc-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(16, 24, 40, .1);
  border-radius: var(--r-md);
}

.page-about .svc-rank {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--orange-500);
  line-height: 1.4;
}

.page-about .svc-name {
  margin: 0;
  font-size: .98rem;
  font-weight: 800;
  color: var(--ink-900);
}

.page-about .svc-desc {
  margin: 5px 0 0;
  font-size: .87rem;
  line-height: 1.7;
  color: rgba(16, 24, 40, .7);
}

.page-about .svc-aside {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-svc-panel .status-capsule {
  align-self: start;
}

.page-about .svc-card {
  padding: 16px 18px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(16, 24, 40, .1);
  border-radius: var(--r-md);
}

.page-about .svc-card-title {
  margin: 0 0 8px;
  font-size: .94rem;
  font-weight: 800;
  color: var(--ink-900);
}

.page-about .svc-card-line {
  margin: 0 0 6px;
  font-size: .87rem;
  line-height: 1.72;
  color: rgba(16, 24, 40, .74);
}

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

.page-about .svc-card-line a {
  color: var(--teal-700);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.page-about .rule-diag {
  margin: 34px 0 0;
}

/* ---------- 成都本地 ---------- */
.page-about .about-local-grid {
  display: grid;
  gap: 24px;
}

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

.page-about .about-local-copy .section-title {
  margin: 10px 0 0;
  max-width: 20ch;
}

.page-about .local-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .local-item {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: .92rem;
  line-height: 1.74;
  color: var(--soft);
}

.page-about .local-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime-400);
}

.page-about .about-local-copy .btn {
  margin-top: 18px;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-bottom: 48px;
}

.page-about .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .role-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-head-grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-tl-panel,
  .page-about .about-flow-panel,
  .page-about .about-ver-panel,
  .page-about .about-svc-panel {
    padding: 40px 36px 46px;
  }

  .page-about .about-tl-grid {
    margin-top: 30px;
  }

  .page-about .about-tl-aside {
    margin-top: 0;
    padding-top: 0;
    padding-left: 26px;
    border-top: 0;
    border-left: 1px solid var(--about-line);
  }

  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-ver-aside {
    margin-top: 0;
  }

  .page-about .about-svc-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-local-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-tl-head .section-title,
  .page-about .about-local-copy .section-title,
  .page-about .about-head-main .display {
    max-width: 26ch;
  }
}

@media (min-width: 1180px) {
  .page-about .metric-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card > summary::after {
    transition: none;
  }
}