.page-about {
  --about-pad: clamp(20px, 3.4vw, 34px);
  --about-track-pad: clamp(26px, 4vw, 42px);
  --about-gap-lg: clamp(30px, 6vw, 84px);
  --about-crew-num: clamp(28px, 3.6vw, 40px);
  background:
    radial-gradient(120% 55% at 86% -6%, rgba(75, 58, 140, .45), transparent 62%),
    radial-gradient(80% 45% at 2% 44%, rgba(53, 224, 200, .06), transparent 64%),
    var(--sky-base);
  color: var(--sky-text);
  overflow-x: clip;
}

/* ---------- 通用局部调整 ---------- */
.page-about .sky-body {
  max-width: 36em;
  margin: 0;
}

.page-about .sky-body + .sky-body {
  margin-top: 1em;
}

.page-about .sky-note {
  max-width: 30em;
}

.page-about .sky-media {
  margin: 0;
}

.page-about .sky-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--sky-hair);
  background: var(--sky-panel);
}

.page-about .sky-media-caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--sky-muted);
}

.page-about a:not(.sky-btn) {
  color: var(--sky-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about a:not(.sky-btn):hover {
  color: var(--sky-pulse);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(30px, 6vw, 72px);
  padding-bottom: clamp(14px, 2.5vw, 26px);
}

.page-about .about-hero__context {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--sky-muted);
}

.page-about .about-hero__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--sky-pulse);
  animation: about-breathe 2.4s ease-out infinite;
}

@keyframes about-breathe {
  0%   { box-shadow: 0 0 0 0 rgba(255, 122, 47, .5); }
  70%  { box-shadow: 0 0 0 11px rgba(255, 122, 47, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 122, 47, 0); }
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 42px);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__aside {
  padding: var(--about-pad);
  border: 1px solid var(--sky-hair);
  background:
    linear-gradient(158deg, rgba(75, 58, 140, .34), rgba(16, 27, 54, .95) 58%);
}

.page-about .about-facts {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--sky-hair);
  font-size: 14px;
}

.page-about .about-facts li:last-child {
  border-bottom: 0;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: .04em;
  color: var(--sky-title);
}

.page-about .about-facts li:first-child .about-facts__num {
  color: var(--sky-pulse);
}

/* ---------- 首屏下方实景 ---------- */
.page-about .about-still {
  padding-top: clamp(10px, 2vw, 18px);
  padding-bottom: clamp(30px, 5vw, 58px);
}

/* ---------- 赛季分区与团队分工 ---------- */
.page-about .about-split__grid,
.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 36px);
}

.page-about .about-split__head .sky-h2 {
  margin: 12px 0 14px;
}

.page-about .about-crew {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--sky-hair);
  border: 1px solid var(--sky-hair);
}

.page-about .about-crew__item {
  position: relative;
  padding: var(--about-pad);
  background: var(--sky-panel);
  transition: box-shadow .2s ease-out;
}

.page-about .about-crew__item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--sky-pulse);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .2s ease-out;
}

.page-about .about-crew__item:hover,
.page-about .about-crew__item:focus-within {
  box-shadow: inset 0 0 0 100px rgba(75, 58, 140, .24);
}

.page-about .about-crew__item:hover::before,
.page-about .about-crew__item:focus-within::before {
  transform: scaleY(1);
}

.page-about .about-crew__range {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--sky-nebula-lift);
}

.page-about .about-crew__stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
}

.page-about .about-crew__num {
  font-family: var(--font-mono);
  font-size: var(--about-crew-num);
  line-height: 1.05;
  letter-spacing: .04em;
  color: var(--sky-title);
}

.page-about .about-crew__unit {
  font-size: 13px;
  color: var(--sky-muted);
}

.page-about .about-crew__desc {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sky-text);
}

.page-about .about-sectors__figure {
  margin-top: clamp(28px, 4vw, 46px);
}

/* ---------- 履历的四个层级 ---------- */
.page-about .about-levels__head .sky-h2 {
  margin: 12px 0 16px;
}

.page-about .about-levels__head .sky-lede {
  max-width: 34em;
}

.page-about .about-levels {
  list-style: none;
  margin: clamp(30px, 4.5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--sky-hair);
  border-top: 1px solid var(--sky-hair);
  border-bottom: 1px solid var(--sky-hair);
}

.page-about .about-levels__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--about-pad);
  background: var(--sky-base);
}

.page-about .about-levels__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--sky-cyan);
}

.page-about .about-levels__item .sky-h3 {
  margin: 0;
}

.page-about .about-levels__item .sky-body {
  font-size: 14px;
  max-width: 100%;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline__head .sky-h2 {
  margin: 12px 0 12px;
}

.page-about .about-track__index {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-track__index a {
  display: inline-block;
  padding: 5px 13px;
  border: 1px solid var(--sky-hair-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--sky-muted);
  text-decoration: none;
  transition: color .18s ease-out, border-color .18s ease-out;
}

.page-about .about-track__index a:hover,
.page-about .about-track__index a:focus-visible {
  color: var(--sky-pulse);
  border-color: rgba(255, 122, 47, .55);
}

.page-about .about-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-track-pad);
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg,
      var(--sky-pulse) 0%,
      rgba(138, 120, 214, .55) 26%,
      rgba(138, 120, 214, .14) 100%);
}

.page-about .about-track__item {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 44px);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

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

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-track-pad) + 1px);
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--sky-base);
  border: 2px solid var(--sky-pulse);
}

.page-about .about-track__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .14em;
  color: var(--sky-pulse);
}

.page-about .about-track__item .sky-h3 {
  margin: 0 0 8px;
}

/* ---------- 共建机构 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-partners__lead .sky-h2 {
  margin: 12px 0 16px;
}

.page-about .about-partners__shot {
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-partners__panel {
  padding: var(--about-pad);
  border: 1px solid var(--sky-hair);
  background:
    linear-gradient(180deg, rgba(75, 58, 140, .2), rgba(16, 27, 54, .9) 46%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-fold {
  border-top: 1px solid var(--sky-hair);
}

.page-about .about-fold summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 32px 16px 0;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: .04em;
  color: var(--sky-title);
}

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

.page-about .about-fold summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--sky-pulse);
  transition: transform .2s ease-out;
}

.page-about .about-fold[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}

.page-about .about-fold summary:focus-visible {
  outline: 1px solid var(--sky-nebula-lift);
  outline-offset: 3px;
}

.page-about .about-fold .sky-body {
  padding: 0 0 20px;
  font-size: 14.5px;
  color: var(--sky-text);
}

.page-about .about-partners__panel .sky-panel-note {
  margin-top: 20px;
}

/* ---------- 复核与不一致处理 ---------- */
.page-about .about-review__head .sky-h2 {
  margin: 12px 0 16px;
}

.page-about .about-review__steps {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--sky-hair);
  border: 1px solid var(--sky-hair);
}

.page-about .about-review__steps li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 6px;
  padding: var(--about-pad);
  background: var(--sky-panel);
}

.page-about .about-review__idx {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: .06em;
  color: var(--sky-nebula-lift);
}

.page-about .about-review__steps li .sky-h3 {
  margin: 0;
}

.page-about .about-review__steps li .sky-body {
  grid-column: 2;
  font-size: 14.5px;
}

.page-about .about-review__foot {
  margin-top: clamp(20px, 3vw, 30px);
  padding-left: 16px;
  border-left: 2px solid var(--sky-line-violet);
}

/* ---------- 认可 ---------- */
.page-about .about-awards__head .sky-h2 {
  margin: 12px 0 0;
}

.page-about .about-awards__list {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
}

.page-about .about-awards__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 18px;
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: 1px solid var(--sky-hair);
}

.page-about .about-awards__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--sky-pulse);
  white-space: nowrap;
}

.page-about .about-awards__item .sky-body {
  font-size: 14.5px;
  max-width: 34em;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__panel {
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--sky-line-violet);
  background:
    linear-gradient(142deg, rgba(75, 58, 140, .4), rgba(16, 27, 54, .96) 62%);
}

.page-about .about-cta__panel .sky-h2 {
  margin: 0 0 16px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 平板起 ---------- */
@media (min-width: 720px) {
  .page-about .about-crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-crew__item:first-child {
    grid-column: 1 / -1;
  }

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

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .78fr);
    gap: var(--about-gap-lg);
    align-items: start;
  }

  .page-about .about-hero__aside {
    margin-top: clamp(26px, 4vw, 58px);
  }

  .page-about .about-split__grid,
  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 288px) minmax(0, 1fr);
    gap: var(--about-gap-lg);
    align-items: start;
  }

  .page-about .about-split__body,
  .page-about .about-track {
    padding-top: 28px;
  }

  .page-about .about-timeline__head,
  .page-about .about-split__head {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

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

  .page-about .about-crew__item:first-child {
    grid-column: auto;
  }

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

  .page-about .about-levels__item:nth-child(2) {
    padding-top: calc(var(--about-pad) + 22px);
  }

  .page-about .about-levels__item:nth-child(3) {
    padding-top: calc(var(--about-pad) + 44px);
  }

  .page-about .about-levels__item:nth-child(4) {
    padding-top: calc(var(--about-pad) + 66px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: var(--about-gap-lg);
    align-items: start;
  }

  .page-about .about-partners__panel {
    margin-top: clamp(30px, 4vw, 64px);
  }

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

  .page-about .about-review__steps li {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 10px;
  }

  .page-about .about-review__idx {
    grid-row: auto;
  }

  .page-about .about-review__steps li .sky-body {
    grid-column: 1;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__dot {
    animation: none;
  }

  .page-about .about-crew__item,
  .page-about .about-crew__item::before,
  .page-about .about-fold summary::after,
  .page-about .about-track__index a {
    transition: none;
  }
}