.page-about {
  --about-line: #1E2A44;
  --about-glow: rgba(34, 224, 214, .22);
  --about-purple-glow: rgba(124, 92, 255, .28);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .story-hero {
  position: relative;
  padding: clamp(36px, 5.5vw, 88px) 0 clamp(32px, 4.5vw, 68px);
  border-bottom: 1px solid var(--grid);
}

.page-about .story-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(30, 42, 68, .55) 1px, transparent 1px),
    linear-gradient(rgba(30, 42, 68, .35) 1px, transparent 1px);
  background-size: 96px 96px;
  pointer-events: none;
  mask-image: radial-gradient(circle at 74% 18%, rgba(0, 0, 0, .9), transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 74% 18%, rgba(0, 0, 0, .9), transparent 72%);
}

.page-about .story-hero > .page-shell {
  position: relative;
  z-index: 1;
}

.page-about .story-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 34px);
}

.page-about .story-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 6.2vw, 72px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--white);
  max-width: 17ch;
  text-shadow: 0 0 42px var(--about-glow);
}

.page-about .story-hero .lede {
  margin: 20px 0 0;
  max-width: 40ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--text);
}

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

.page-about .story-hero__plate .plate {
  border: 2px solid var(--void);
  box-shadow: var(--shadow-hard);
  padding: 22px 22px 20px;
  max-width: 380px;
}

.page-about .story-hero__plate .plate__title {
  font-size: 18px;
  font-weight: 800;
}

.page-about .story-hero__plate .plate__meta + .plate__meta {
  margin-top: 8px;
  line-height: 1.7;
}

.page-about .story-hero__figure {
  margin: clamp(30px, 4vw, 56px) 0 0;
  border: 1px solid var(--grid);
}

/* ---------- 时间线 ---------- */
.page-about .story-timeline {
  position: relative;
  padding: clamp(46px, 6.5vw, 100px) 0;
  border-bottom: 1px solid var(--grid);
  background:
    linear-gradient(180deg, rgba(14, 22, 38, .62), rgba(5, 7, 13, .92)),
    linear-gradient(90deg, rgba(30, 42, 68, .4) 1px, transparent 1px) 0 0 / 120px 100%;
}

.page-about .tl {
  list-style: none;
  margin: clamp(30px, 4.5vw, 60px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 10px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--purple) 52%, rgba(30, 42, 68, .3));
}

.page-about .tl__stage {
  position: relative;
  padding: 0 0 clamp(34px, 5vw, 62px) 58px;
}

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

.page-about .tl__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
  background: var(--void);
  border: 2px solid var(--cyan);
  box-shadow: 3px 3px 0 rgba(34, 224, 214, .22);
}

.page-about .tl__era {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--green);
  margin: 0 0 6px;
}

.page-about .tl__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 28px);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -.01em;
}

.page-about .tl__text {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 团队 ---------- */
.page-about .story-team {
  padding: clamp(46px, 6.5vw, 100px) 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .story-team__grid {
  align-items: start;
  row-gap: clamp(24px, 3.5vw, 40px);
}

.page-about .story-team__text .section-title {
  margin-top: 10px;
}

.page-about .story-team__text .prose {
  margin-top: 16px;
}

.page-about .story-team__media {
  margin: 0;
}

.page-about .story-team__media .media-frame {
  border: 1px solid var(--grid);
}

.page-about .roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(30px, 4.5vw, 52px);
  background: var(--grid);
  border: 1px solid var(--grid);
  border-top: 2px solid var(--cyan);
}

.page-about .role {
  background: var(--panel);
  padding: 24px 22px;
  outline: none;
  transition: background .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .role:hover,
.page-about .role:focus-visible {
  background: var(--panel-2);
  transform: translateY(-4px);
  box-shadow: inset 0 -3px 0 var(--green);
}

.page-about .role__name {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: .01em;
}

.page-about .role__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 数据流程 ---------- */
.page-about .story-data {
  padding: clamp(46px, 6.5vw, 100px) 0;
  border-bottom: 1px solid var(--grid);
  background: rgba(14, 22, 38, .38);
}

.page-about .flow {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: clamp(30px, 4.5vw, 54px) 0 0;
  padding: 0;
}

.page-about .flow__step {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--void);
  border: 2px solid var(--grid);
  box-shadow: 5px 5px 0 rgba(5, 7, 13, .8);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-about .flow__step:hover {
  border-color: var(--purple);
  transform: translateY(-3px);
}

.page-about .flow__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--purple);
}

.page-about .flow__title {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
}

.page-about .flow__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .story-data__note {
  margin-top: clamp(28px, 4vw, 46px);
  padding: 24px 22px;
  border-left: 3px solid var(--green);
  background: rgba(182, 255, 59, .05);
}

.page-about .story-data__note .prose + .prose {
  margin-top: 14px;
}

/* ---------- 合作生态 ---------- */
.page-about .story-partners {
  padding: clamp(46px, 6.5vw, 100px) 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .story-partners__grid {
  align-items: start;
  row-gap: clamp(24px, 3.5vw, 42px);
}

.page-about .story-partners__text .section-title {
  margin-top: 10px;
}

.page-about .story-partners__text .prose {
  margin-top: 16px;
}

.page-about .story-partners__media {
  margin: 0;
}

.page-about .story-partners__media .media-frame {
  border: 1px solid var(--purple);
  box-shadow: 6px 6px 0 var(--about-purple-glow);
}

.page-about .ptags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 22px;
  border-top: 1px dashed var(--grid);
}

.page-about .ptags .tag {
  font-size: 13px;
  padding: 7px 14px;
  transition: transform .2s var(--ease);
}

.page-about .ptags .tag:hover {
  transform: translateY(-2px);
}

/* ---------- 下一步 ---------- */
.page-about .story-next {
  padding: clamp(46px, 6.5vw, 104px) 0 clamp(56px, 7vw, 112px);
}

.page-about .story-next__panel {
  position: relative;
  padding: clamp(26px, 4vw, 46px);
  background: linear-gradient(140deg, rgba(124, 92, 255, .14), rgba(34, 224, 214, .07) 62%, transparent);
  border: 2px solid var(--grid);
  border-top: 3px solid var(--cyan);
  box-shadow: 8px 8px 0 rgba(5, 7, 13, .85);
}

.page-about .story-next__panel .section-title {
  margin-top: 10px;
}

.page-about .story-next__panel .prose {
  margin-top: 16px;
  max-width: 62ch;
}

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

.page-about .story-next__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 3.5vw, 44px);
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .story-next__stats .stat {
  background: var(--void);
  padding: 22px 18px;
  text-align: left;
}

.page-about .story-next__stats .stat__value {
  display: block;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -.01em;
}

.page-about .story-next__stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .story-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .68fr);
    align-items: end;
  }

  .page-about .story-hero__plate {
    justify-self: end;
    width: 100%;
  }

  .page-about .tl__stage {
    padding-left: 74px;
  }

  .page-about .tl::before {
    left: 24px;
  }

  .page-about .tl__marker {
    width: 50px;
    height: 50px;
    font-size: 15px;
  }

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    background: var(--grid);
    border: 1px solid var(--grid);
  }

  .page-about .flow__step {
    border: none;
    box-shadow: none;
  }

  .page-about .flow__step:hover {
    transform: none;
    background: var(--panel-2);
    box-shadow: inset 0 -3px 0 var(--purple);
  }
}

@media (max-width: 420px) {
  .page-about .story-hero h1 {
    font-size: 30px;
  }

  .page-about .story-next__stats .stat {
    padding: 18px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role,
  .page-about .flow__step,
  .page-about .ptags .tag {
    transition: none;
    transform: none;
  }
}