.page-about {
  --about-hair: rgba(185, 198, 204, 0.22);
  --about-soft: rgba(247, 244, 236, 0.86);
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(40px, 6vw, 80px);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 2.6vw, 26px);
}
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-note);
  color: var(--silver);
}
.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(185, 198, 204, 0.45);
}
.page-about .breadcrumbs__link {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .breadcrumbs__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(14px, 2vw, 22px);
  padding: clamp(28px, 4.6vw, 52px) 0 clamp(34px, 5vw, 64px);
  background:
    radial-gradient(120% 82% at 86% 4%, rgba(43, 242, 212, 0.14), transparent 58%),
    radial-gradient(90% 70% at 6% 96%, rgba(255, 106, 31, 0.09), transparent 62%),
    linear-gradient(180deg, var(--ink-deep), var(--ink));
}
.page-about .about-hero__inner {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  align-items: center;
}
.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-display);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-about .about-hero__title em {
  font-style: normal;
  color: var(--cyan);
  box-shadow: inset 0 -0.16em 0 rgba(43, 242, 212, 0.3);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 2vw, 20px);
  margin-top: clamp(22px, 3vw, 30px);
  padding-top: clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--about-hair);
}
.page-about .about-hero__stats .stat__num {
  display: block;
  font-family: var(--font-num);
  font-size: var(--num-md);
  line-height: 1;
  color: var(--orange);
}
.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-note);
  color: var(--silver);
}
.page-about .about-hero__visual {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  min-height: 220px;
  border-radius: var(--radius-lg);
  background: var(--ink-mid);
}
.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-hero__badge {
  position: absolute;
  left: clamp(14px, 2.6vw, 24px);
  bottom: clamp(14px, 2.6vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: rgba(10, 38, 33, 0.8);
  border: 1px solid rgba(43, 242, 212, 0.36);
}
.page-about .about-hero__badge-num {
  font-family: var(--font-num);
  font-size: var(--fs-h3);
  line-height: 1;
  color: var(--cyan);
}
.page-about .about-hero__badge-label {
  font-size: var(--fs-note);
  color: var(--paper);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  padding-top: clamp(20px, 3vw, 30px);
}
.page-about .about-index__label {
  margin: 0 0 10px;
  font-size: var(--fs-note);
  letter-spacing: 0.08em;
  color: var(--silver);
}
.page-about .index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .index-list__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: rgba(30, 74, 68, 0.55);
  border: 1px solid transparent;
  color: var(--paper);
  font-size: var(--fs-note);
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about .index-list__link:hover {
  border-color: rgba(43, 242, 212, 0.5);
  color: var(--cyan);
}
.page-about .index-list__link[aria-current="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-deep);
}

/* ---------- 章节基础 ---------- */
.page-about .section {
  padding: clamp(36px, 5.6vw, 72px) 0;
}
.page-about .section--tight {
  padding-top: clamp(20px, 3vw, 34px);
}
.page-about .chapter {
  display: flex;
  align-items: baseline;
  gap: clamp(10px, 1.6vw, 18px);
  margin-bottom: clamp(18px, 2.8vw, 30px);
  padding-bottom: clamp(12px, 1.8vw, 18px);
  border-bottom: 1px solid var(--about-hair);
}
.page-about .chapter__num {
  font-family: var(--font-num);
  font-size: var(--num-md);
  line-height: 1;
  color: var(--orange);
}
.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-h2);
  letter-spacing: -0.02em;
  line-height: 1.24;
  color: var(--paper);
}
.page-about .prose p {
  margin: 0 0 0.9em;
  max-width: 40em;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--about-soft);
}
.page-about .prose p:last-child {
  margin-bottom: 0;
}
.page-about .prose {
  margin: 0;
}

/* ---------- 01 起点 ---------- */
.page-about .why-layout {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}
.page-about .why-points {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .why-points__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(14px, 2vw, 18px) clamp(14px, 2vw, 20px);
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(20, 57, 47, 0.65), rgba(18, 21, 23, 0.5));
  border-left: 2px solid rgba(43, 242, 212, 0.35);
}
.page-about .why-points__num {
  flex: none;
  font-family: var(--font-num);
  font-size: var(--fs-h3);
  line-height: 1.2;
  color: var(--cyan);
}
.page-about .why-points__text {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--about-soft);
}

/* ---------- 02 版本时间轴 ---------- */
.page-about .timeline {
  position: relative;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .timeline__card {
  height: 100%;
  padding: clamp(20px, 2.6vw, 26px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-hair);
  background: linear-gradient(158deg, rgba(20, 57, 47, 0.92), rgba(18, 21, 23, 0.94));
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-about .timeline__card:hover,
.page-about .timeline__item:focus-within .timeline__card {
  transform: translateY(-4px);
  border-color: rgba(43, 242, 212, 0.55);
  box-shadow: 0 20px 44px -26px rgba(43, 242, 212, 0.5);
}
.page-about .timeline__year {
  margin: 0;
  font-family: var(--font-num);
  font-size: var(--num-md);
  line-height: 1;
  color: var(--orange);
}
.page-about .timeline__title {
  margin: 14px 0 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-h3);
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--paper);
}
.page-about .timeline__text {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--about-soft);
}
.page-about .timeline__result {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(43, 242, 212, 0.3);
  font-size: var(--fs-note);
  line-height: 1.6;
  color: var(--cyan-soft);
}
.page-about .about-chart {
  margin: clamp(24px, 3.6vw, 40px) 0 0;
}

/* ---------- 03 河南 ---------- */
.page-about .about-lead {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}
.page-about .local-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}
.page-about .local-list__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 28px);
  align-items: start;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--about-hair);
  transition: background 0.25s var(--ease);
}
.page-about .local-list__row:hover {
  background: rgba(30, 74, 68, 0.28);
}
.page-about .local-list__tick {
  font-family: var(--font-num);
  font-size: var(--num-md);
  line-height: 1;
  color: rgba(185, 198, 204, 0.5);
  transition: color 0.25s var(--ease);
}
.page-about .local-list__row:hover .local-list__tick {
  color: var(--cyan);
}
.page-about .local-list__title {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-h3);
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .local-list__text {
  margin: 0;
  max-width: 44em;
  font-size: var(--fs-body);
  line-height: 1.68;
  color: var(--about-soft);
}

/* ---------- 04 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: start;
}
.page-about .team-figure {
  margin: 0;
}
.page-about .team-groups {
  display: grid;
  gap: clamp(12px, 1.8vw, 16px);
  margin-top: clamp(18px, 2.6vw, 26px);
}
.page-about .group-card {
  padding: clamp(16px, 2.2vw, 22px);
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair);
  background: linear-gradient(140deg, rgba(30, 74, 68, 0.48), rgba(18, 21, 23, 0.72));
}
.page-about .group-card__tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 180, 137, 0.16);
  color: var(--orange-soft);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-note);
  letter-spacing: 0.02em;
}
.page-about .group-card__text {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--about-soft);
}

/* ---------- 05 往前 ---------- */
.page-about .ahead-list {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: ahead;
}
.page-about .ahead-list__item {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border-radius: var(--radius-lg);
  background: rgba(18, 21, 23, 0.7);
  border: 1px solid var(--about-hair);
  border-top: 3px solid rgba(255, 106, 31, 0.7);
}
.page-about .ahead-list__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: var(--num-md);
  line-height: 1;
  color: var(--orange);
}
.page-about .ahead-list__title {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-h3);
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--paper);
}
.page-about .ahead-list__text {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--about-soft);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  padding: clamp(22px, 3.4vw, 38px);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(110% 140% at 92% 0%, rgba(43, 242, 212, 0.16), transparent 60%),
    linear-gradient(120deg, rgba(20, 57, 47, 0.9), rgba(18, 21, 23, 0.94));
  border: 1px solid rgba(43, 242, 212, 0.26);
}
.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--fs-h2);
  letter-spacing: -0.02em;
  line-height: 1.24;
  color: var(--paper);
}
.page-about .about-cta p {
  margin: 0;
  max-width: 44em;
  font-size: var(--fs-body);
  line-height: 1.68;
  color: var(--about-soft);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .team-groups {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ahead-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  }
  .page-about .about-hero__visual {
    min-height: 340px;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    clip-path: polygon(7% 0, 100% 0, 100% 100%, 0 100%);
  }
  .page-about .why-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
  .page-about .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 2.6vw, 32px);
    padding-top: 6px;
  }
  .page-about .timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 108px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(43, 242, 212, 0.45) 22%, rgba(255, 106, 31, 0.35) 72%, transparent);
    pointer-events: none;
  }
  .page-about .timeline__item {
    position: relative;
    z-index: 1;
  }
  .page-about .timeline__item:nth-child(2) {
    margin-top: 48px;
  }
  .page-about .timeline__item:nth-child(3) {
    margin-top: 96px;
  }
  .page-about .team-layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__card,
  .page-about .index-list__link,
  .page-about .local-list__row,
  .page-about .local-list__tick,
  .page-about .breadcrumbs__link {
    transition: none;
  }
  .page-about .timeline__card:hover,
  .page-about .timeline__item:focus-within .timeline__card {
    transform: none;
  }
}