.page-about {
  --about-radius: 3px;
  --about-shell: 68ch;
}

.page-about .crumbs {
  padding-top: 18px;
}

/* ---------- 首屏：品牌叙事 + 档案概览 ---------- */
.page-about .about-hero {
  padding: 22px 0 0;
}

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

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 7.4vw, 56px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__desc {
  margin: 16px 0 0;
  max-width: var(--about-shell);
  color: var(--paper);
  opacity: 0.88;
}

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

.page-about .about-stats__item {
  background: var(--ink-2);
  padding: 14px 16px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stats__item:nth-child(3) .about-stats__num {
  color: var(--orange);
}

.page-about .about-stats__item:nth-child(4) .about-stats__num {
  color: var(--gold);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__panel {
  padding: 18px;
}

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

/* ---------- 主体：左侧索引 + 右侧章节流 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 34px;
  padding-bottom: 48px;
}

.page-about .about-toc__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc__list li {
  flex: 0 0 auto;
}

.page-about .about-toc__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 2px solid var(--line-strong);
  border-radius: var(--about-radius);
  background: var(--ink-2);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about .about-toc__list a .mono {
  color: var(--cyan);
  font-size: 12px;
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

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

.page-about .chapter + .chapter {
  margin-top: 46px;
  padding-top: 34px;
  border-top: 2px solid var(--line);
}

.page-about .chapter__title {
  margin: 0 0 14px;
  font-size: clamp(22px, 4.8vw, 32px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .chapter p {
  margin: 0 0 14px;
  max-width: var(--about-shell);
  color: var(--paper);
  opacity: 0.9;
}

.page-about .chapter__note {
  border-left: 4px solid var(--orange);
  background: var(--orange-deep);
  border-radius: var(--about-radius);
  padding: 12px 14px;
  font-size: 14px;
  color: var(--paper);
  opacity: 1;
}

/* ---------- 时间线 ---------- */
.page-about .tl-nav {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tl-nav a {
  display: inline-block;
  padding: 6px 10px;
  border: 2px solid var(--line-strong);
  border-radius: var(--about-radius);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about .tl-nav a:hover,
.page-about .tl-nav a:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 16px;
  border-left: 2px solid var(--line-strong);
  display: grid;
  gap: 16px;
}

.page-about .tl-item {
  border: 2px solid var(--line-strong);
  border-radius: var(--about-radius);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
  padding: 16px 18px;
}

.page-about .tl-item__year {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--orange);
  color: var(--ink-0);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-about .tl-item:last-child .tl-item__year {
  background: var(--cyan);
}

.page-about .tl-item__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl-item p {
  margin: 0;
  font-size: 15px;
  color: var(--paper);
  opacity: 0.86;
}

/* ---------- 团队名册 ---------- */
.page-about .roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .roster__item {
  border: 2px solid var(--line-strong);
  border-left-width: 6px;
  border-radius: var(--about-radius);
  background: var(--ink-2);
  padding: 14px 16px;
}

.page-about .roster__item--cyan { border-left-color: var(--cyan); }
.page-about .roster__item--orange { border-left-color: var(--orange); }
.page-about .roster__item--gold { border-left-color: var(--gold); }
.page-about .roster__item--violet { border-left-color: var(--violet); }

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

.page-about .roster__name {
  margin: 4px 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .roster__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.85;
}

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

/* ---------- 数据流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .flow__item {
  border: 2px solid var(--line-strong);
  border-radius: var(--about-radius);
  background: var(--ink-3);
  padding: 16px 18px;
}

.page-about .flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .flow__name {
  margin: 6px 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .flow__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.86;
}

/* ---------- 合作生态 ---------- */
.page-about .eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-bottom: 22px;
}

.page-about .eco__panel {
  border: 2px solid var(--line-strong);
  border-radius: var(--about-radius);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
  padding: 14px;
}

.page-about .eco__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .eco__cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .ec-link {
  stroke: var(--line-strong);
  stroke-width: 2;
}

.page-about .ec-node circle {
  stroke: var(--ink-0);
  stroke-width: 2;
  transition: stroke 0.18s ease, fill 0.18s ease;
}

.page-about .ec-node--hub circle { fill: var(--cyan); }
.page-about .ec-node--media circle { fill: var(--violet); }
.page-about .ec-node--youth circle { fill: var(--orange); }
.page-about .ec-node--venue circle { fill: var(--gold); }

.page-about .ec-node text {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--paper);
}

.page-about .ec-node:hover circle,
.page-about .ec-node:focus-within circle {
  stroke: var(--paper);
  stroke-width: 4;
}

.page-about .eco__cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .eco__card {
  border: 2px solid var(--line-strong);
  border-top-width: 6px;
  border-radius: var(--about-radius);
  background: var(--ink-2);
  padding: 16px 18px;
}

.page-about .eco__card--cyan { border-top-color: var(--cyan); }
.page-about .eco__card--orange { border-top-color: var(--orange); }
.page-about .eco__card--gold { border-top-color: var(--gold); }

.page-about .eco__card-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .eco__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.86;
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-tabs {
  margin-top: 6px;
}

.page-about .award-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .award-item {
  border: 2px solid var(--line-strong);
  border-left: 6px solid var(--cyan);
  border-radius: var(--about-radius);
  background: var(--ink-2);
  padding: 12px 14px;
}

.page-about .award-item--gold {
  border-left-color: var(--gold);
}

.page-about .award-item__name {
  display: block;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .award-item__meta {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-link-line {
  margin: 16px 0 0;
}

/* ---------- 河南本地 ---------- */
.page-about .about-henan {
  border: 2px solid var(--cyan);
  border-radius: var(--about-radius);
  background: var(--cyan-deep);
  padding: 18px;
}

.page-about .about-henan p {
  max-width: var(--about-shell);
}

.page-about .about-henan__list {
  margin-top: 14px;
}

/* ---------- 下一步入口 ---------- */
.page-about .about-next .chapter__title {
  margin-bottom: 18px;
}

.page-about .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .next-card {
  display: block;
  border: 2px solid var(--line-strong);
  border-radius: var(--about-radius);
  background: var(--ink-2);
  padding: 18px;
  color: var(--paper);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
}

.page-about .next-card__idx {
  display: block;
  font-size: 12px;
  color: var(--orange);
}

.page-about .next-card__title {
  display: block;
  margin: 8px 0 6px;
  font-size: 17px;
  font-weight: 800;
}

.page-about .next-card__desc {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.85;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .roster,
  .page-about .flow,
  .page-about .eco__cards,
  .page-about .award-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .tl {
    padding-left: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .eco__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 20px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-about .about-toc__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc__list a {
    width: 100%;
    box-sizing: border-box;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .next-card,
  .page-about .about-toc__list a,
  .page-about .tl-nav a,
  .page-about .ec-node circle {
    transition: none;
  }

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