.page-about {
  --about-rail: 208px;
  color: var(--body-text);
}

.page-about .about-shell {
  padding-block: 22px 72px;
}

.page-about .breadcrumb {
  margin-bottom: 26px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  gap: 26px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--edge);
}

.page-about .about-hero__copy h1 {
  margin: 12px 0 0;
  color: var(--paper);
}

.page-about .about-hero__copy .lede {
  margin: 18px 0 0;
  max-width: 40em;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 15px;
  border: 1px solid var(--edge);
  border-radius: var(--r-pill);
  background: rgba(27, 42, 94, .34);
  font-size: 13px;
  color: var(--body-text);
}

.page-about .about-hero__facts .mono {
  color: var(--neon);
  font-size: 15px;
  font-weight: 600;
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

/* ---------- 主体布局 ---------- */

.page-about .about-layout {
  display: grid;
  gap: 30px;
  padding-top: 44px;
}

.page-about .about-layout__rail {
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .about-layout__rail .index-rail__link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 11px 0;
  border-bottom: 1px solid var(--edge);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-layout__rail .index-rail__link:first-child {
  border-top: 1px solid var(--edge);
}

.page-about .about-layout__rail .index-rail__link:hover,
.page-about .about-layout__rail .index-rail__link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--neon);
}

.page-about .about-layout__rail .index-rail__link.is-active {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-about .index-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--neon);
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .about-block {
  padding-bottom: 54px;
  scroll-margin-top: 96px;
}

.page-about .about-block__head {
  margin-bottom: 20px;
}

.page-about .about-block__head h2 {
  margin: 10px 0 0;
  color: var(--paper);
}

.page-about .about-block__body p {
  margin: 0 0 15px;
  max-width: 40em;
  line-height: 1.78;
}

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

.page-about .about-inline-link a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .45);
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  border-bottom-color: var(--neon);
}

/* ---------- 时间线 ---------- */

.page-about .season-line {
  position: relative;
  margin: 28px 0 0;
  padding: 2px 0 0 27px;
  list-style: none;
}

.page-about .season-line::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--stand) 55%, rgba(42, 56, 102, 0) 100%);
}

.page-about .season-line__item {
  position: relative;
  padding-bottom: 26px;
}

.page-about .season-line__item:last-child {
  padding-bottom: 0;
}

.page-about .season-line__dot {
  position: absolute;
  left: -27px;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--neon);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, .12);
}

.page-about .season-line__tag {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--neon);
}

.page-about .season-line__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .season-line__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-text);
}

.page-about .season-line__more {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

@media (hover: hover) and (pointer: fine) {
  .page-about .season-line__more {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    transition: max-height .35s var(--ease), margin-top .35s var(--ease);
  }

  .page-about .season-line__item:hover .season-line__more,
  .page-about .season-line__item:focus-within .season-line__more {
    max-height: 160px;
    margin-top: 8px;
  }
}

/* ---------- 图文错位 ---------- */

.page-about .about-split {
  display: grid;
  gap: 22px;
  margin-top: 6px;
}

.page-about .about-split__text p {
  margin: 0 0 15px;
  line-height: 1.78;
}

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

.page-about .about-split__figure {
  margin: 0;
}

.page-about .about-media--2x1 {
  aspect-ratio: 2 / 1;
}

/* ---------- 分工卡 ---------- */

.page-about .role-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 26px;
  border: 1px solid var(--edge);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--edge);
}

.page-about .role-card {
  padding: 20px 20px 22px;
  background: rgba(14, 23, 56, .88);
  transition: background .25s var(--ease);
}

.page-about .role-card:hover {
  background: rgba(27, 42, 94, .78);
}

.page-about .role-card__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--neon);
}

.page-about .role-card__title {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .role-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 数据带 ---------- */

.page-about .about-band {
  margin: 6px 0 48px;
  padding: 26px 20px;
  border: 1px solid var(--edge);
  border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 86% 14%, rgba(198, 255, 61, .22), transparent 56%),
    linear-gradient(122deg, var(--deep) 0%, var(--stand) 62%, #22377A 100%);
}

.page-about .about-band__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 16px;
}

.page-about .about-band__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 7vw, 38px);
  font-weight: 600;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-band__unit {
  font-size: .58em;
  margin-left: 2px;
}

.page-about .about-band__label {
  margin: 9px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 246, 255, .78);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 8px;
}

.page-about .team-card {
  padding: 22px 20px;
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  background: rgba(14, 23, 56, .72);
}

.page-about .team-card--accent {
  border-color: rgba(198, 255, 61, .45);
  background: linear-gradient(160deg, rgba(27, 42, 94, .75) 0%, rgba(6, 10, 24, .9) 100%);
}

.page-about .team-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  color: var(--paper);
}

.page-about .team-card--accent .team-card__value {
  color: var(--neon);
}

.page-about .team-card__title {
  margin: 8px 0 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .team-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  margin-top: 30px;
  padding: 26px 22px 28px;
  border-radius: var(--r-lg);
  border: 1px solid var(--edge);
  background:
    radial-gradient(circle at 12% 0%, rgba(255, 106, 26, .16), transparent 60%),
    rgba(27, 42, 94, .42);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0 0 20px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-text);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

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

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

@media (min-width: 900px) {
  .page-about .about-shell {
    padding-block: 28px 96px;
  }

  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 48px;
    padding-bottom: 60px;
  }

  .page-about .about-hero__facts {
    margin-top: 28px;
  }

  .page-about .about-block {
    padding-bottom: 72px;
  }

  .page-about .about-split {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 40px;
  }

  .page-about .about-split--reverse {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .about-split--reverse .about-split__text {
    order: 2;
  }

  .page-about .about-split--reverse .about-split__figure {
    order: 1;
  }

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

  .page-about .role-card {
    padding: 24px 20px 26px;
  }

  .page-about .about-band {
    padding: 32px 30px;
    margin-bottom: 64px;
  }

  .page-about .about-band__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .season-line__title {
    font-size: 19px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 56px;
    padding-top: 60px;
  }

  .page-about .about-layout__rail {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-block__body p {
    max-width: 38em;
  }
}

@media (max-width: 999px) {
  .page-about .about-band {
    margin-inline: calc(var(--gutter) * -1);
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    padding-inline: var(--gutter);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season-line__more,
  .page-about .role-card,
  .page-about .index-rail__link {
    transition: none;
  }
}