.page-about {
  --about-cut: 64px;
  --about-rail: 96px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 12% 0%, #12294c 0%, transparent 58%),
    var(--spx-deep);
  color: var(--spx-mist);
  padding-top: calc(var(--spx-header-h) + clamp(24px, 5vw, 56px));
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-hero__shard {
  position: absolute;
  top: -10%;
  right: 0;
  width: min(52%, 700px);
  height: 128%;
  background: linear-gradient(148deg, rgba(42, 47, 107, .95) 0%, rgba(14, 59, 68, .88) 100%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumbs {
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: end;
}

.page-about .about-hero__copy h1 {
  font-family: var(--spx-font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.12;
  margin: 12px 0 20px;
  color: #fff;
}

.page-about .about-hero .spx-lead {
  max-width: 60ch;
  color: rgba(244, 247, 251, .84);
  font-size: 16.5px;
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__figure {
  margin: 0;
  transform: translateY(8px);
}

.page-about .about-hero__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(40px, 6vw, 72px) 0 0;
  background: rgba(199, 206, 216, .18);
  border-top: 1px solid rgba(199, 206, 216, .18);
  border-bottom: 1px solid rgba(199, 206, 216, .18);
}

.page-about .about-stats__cell {
  background: var(--spx-deep);
  padding: 18px 16px 20px;
}

.page-about .about-stats__cell dt {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--spx-silver);
  margin-bottom: 8px;
}

.page-about .about-stats__cell dd {
  margin: 0;
  font-family: var(--spx-font-data);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 30px);
  color: var(--spx-lime);
  letter-spacing: -.01em;
}

/* ---------- 通用章节头 ---------- */
.page-about .about-head {
  max-width: 760px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-head h2 {
  font-family: var(--spx-font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.18;
  color: var(--spx-deep);
  margin: 12px 0 16px;
}

.page-about .about-head__lead {
  font-size: 16px;
  line-height: 1.8;
  color: #3b4759;
  margin: 0;
}

.page-about .about-head--onDark h2 {
  color: #fff;
}

.page-about .about-head--onDark .about-head__lead {
  color: rgba(244, 247, 251, .82);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 47px;
  top: 14px;
  bottom: 48px;
  width: 2px;
  background: linear-gradient(180deg, var(--spx-silver) 0%, var(--spx-orange) 58%, var(--spx-lime) 100%);
  opacity: .45;
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  gap: 0 32px;
  padding-bottom: clamp(32px, 4.4vw, 56px);
}

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

.page-about .about-tl__dot {
  position: absolute;
  left: 41px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--spx-mist);
  border: 3px solid var(--spx-silver);
  box-sizing: content-box;
  transition: border-color .32s var(--spx-ease), box-shadow .32s var(--spx-ease), background-color .32s var(--spx-ease);
}

.page-about .about-tl__item:hover .about-tl__dot,
.page-about .about-tl__item.is-active .about-tl__dot {
  border-color: var(--spx-orange);
  background: var(--spx-orange);
  box-shadow: 0 0 0 5px rgba(255, 90, 31, .16);
}

.page-about .about-tl__item.is-active .about-tl__year {
  color: var(--spx-orange);
}

.page-about .about-tl__rail {
  padding-top: 2px;
  text-align: center;
}

.page-about .about-tl__year {
  display: block;
  font-family: var(--spx-font-data);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--spx-deep);
  transition: color .32s var(--spx-ease);
}

.page-about .about-tl__stage {
  display: block;
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: .12em;
  color: #7b8794;
}

.page-about .about-tl__body h3 {
  font-family: var(--spx-font-head);
  font-weight: 700;
  font-size: clamp(18px, 2.1vw, 22px);
  line-height: 1.35;
  color: var(--spx-deep);
  margin: 0 0 12px;
}

.page-about .about-tl__body p {
  font-size: 16px;
  line-height: 1.8;
  color: #3b4759;
  margin: 0 0 12px;
  max-width: 68ch;
}

.page-about .about-tl__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: #6b7787;
  margin-top: 4px;
}

/* ---------- 服务线 ---------- */
.page-about .about-lines__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.page-about .about-line {
  position: relative;
  padding: 26px 22px 24px;
  background: #fff;
}

.page-about .about-line__num {
  display: block;
  font-family: var(--spx-font-data);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--spx-orange);
  margin-bottom: 14px;
}

.page-about .about-line h3 {
  font-family: var(--spx-font-head);
  font-weight: 700;
  font-size: 18px;
  color: var(--spx-deep);
  margin: 0 0 10px;
}

.page-about .about-line p {
  font-size: 15px;
  line-height: 1.75;
  color: #45505f;
  margin: 0;
}

.page-about .about-lines__foot {
  margin: 32px 0 0;
  font-size: 15px;
  color: #45505f;
}

.page-about .about-lines__foot a {
  color: var(--spx-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--spx-orange);
  padding-bottom: 2px;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-map__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-map__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.page-about .about-map__cell {
  position: relative;
  padding: 18px 16px 16px;
  background: rgba(7, 12, 20, .32);
  border-left: 3px solid rgba(199, 206, 216, .5);
  border-radius: 2px;
  transition: border-color .32s var(--spx-ease), background-color .32s var(--spx-ease), transform .32s var(--spx-ease);
}

.page-about .about-map__cell--key {
  border-left-color: var(--spx-lime);
  background: rgba(69, 240, 140, .08);
}

.page-about .about-map__cell:hover,
.page-about .about-map__cell:focus-within {
  transform: translateY(-4px);
  border-left-color: var(--spx-orange);
  background: rgba(255, 90, 31, .1);
}

.page-about .about-map__name {
  display: block;
  font-family: var(--spx-font-head);
  font-weight: 700;
  font-size: 16px;
  color: #fff;
}

.page-about .about-map__count {
  display: block;
  margin-top: 6px;
  font-family: var(--spx-font-data);
  font-weight: 700;
  font-size: 20px;
  color: var(--spx-lime);
}

.page-about .about-map__note {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(244, 247, 251, .74);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .32s var(--spx-ease), opacity .32s var(--spx-ease), margin-top .32s var(--spx-ease);
}

.page-about .about-map__cell:hover .about-map__note,
.page-about .about-map__cell:focus-within .about-map__note {
  max-height: 120px;
  opacity: 1;
}

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

.page-about .about-map__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .about-map__figure .spx-media__caption {
  color: rgba(244, 247, 251, .66);
}

.page-about .about-map__foot {
  margin: 32px 0 0;
  font-size: 15px;
  color: rgba(244, 247, 251, .86);
}

.page-about .about-map__foot a {
  color: var(--spx-lime);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid rgba(69, 240, 140, .45);
  padding-bottom: 2px;
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-about .about-team__panel {
  background: var(--spx-mist);
  border-left: 4px solid var(--spx-orange);
  padding: 26px 24px 28px;
}

.page-about .about-team__label {
  font-family: var(--spx-font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--spx-deep);
  margin: 0 0 18px;
}

.page-about .about-team__bar {
  display: grid;
  grid-template-columns: 12fr 8fr 9fr 5fr;
  height: 22px;
  gap: 3px;
  margin-bottom: 22px;
}

.page-about .about-team__seg {
  display: block;
  border-radius: 2px;
}

.page-about .about-team__seg--edit { background: var(--spx-orange); }
.page-about .about-team__seg--venue { background: var(--spx-teal); }
.page-about .about-team__seg--content { background: var(--spx-indigo); }
.page-about .about-team__seg--tech { background: var(--spx-wine); }

.page-about .about-team__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: #3b4759;
}

.page-about .about-team__chip {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex: 0 0 auto;
}

.page-about .about-team__chip--edit { background: var(--spx-orange); }
.page-about .about-team__chip--venue { background: var(--spx-teal); }
.page-about .about-team__chip--content { background: var(--spx-indigo); }
.page-about .about-team__chip--tech { background: var(--spx-wine); }

.page-about .about-team__legend strong {
  font-weight: 700;
  color: var(--spx-deep);
}

.page-about .about-team__legend em {
  margin-left: auto;
  font-family: var(--spx-font-data);
  font-style: normal;
  font-weight: 700;
  color: #6b7787;
}

.page-about .about-team__text h3 {
  font-family: var(--spx-font-head);
  font-weight: 700;
  font-size: clamp(18px, 2.1vw, 22px);
  color: var(--spx-deep);
  margin: 0 0 14px;
}

.page-about .about-team__text p {
  font-size: 16px;
  line-height: 1.8;
  color: #3b4759;
  margin: 0 0 14px;
  max-width: 68ch;
}

.page-about .about-team__foot {
  font-size: 15px;
}

.page-about .about-team__foot a {
  color: var(--spx-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--spx-orange);
  padding-bottom: 2px;
}

.page-about .about-team__figure {
  grid-column: 1 / -1;
  margin: 8px 0 0;
}

.page-about .about-team__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.page-about .about-partners__stat {
  padding: 24px 20px 22px;
  background: rgba(7, 12, 20, .3);
  border-top: 3px solid var(--spx-amber);
  border-radius: 2px;
}

.page-about .about-partners__num {
  font-family: var(--spx-font-data);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  color: #fff;
}

.page-about .about-partners__unit {
  margin-left: 6px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--spx-silver);
}

.page-about .about-partners__stat p {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(244, 247, 251, .82);
}

.page-about .about-partners__note {
  margin: 34px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 247, 251, .88);
  max-width: 72ch;
}

.page-about .about-partners__note a {
  color: var(--spx-amber);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid rgba(255, 194, 75, .45);
  padding-bottom: 2px;
}

/* ---------- 未来投入 ---------- */
.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0;
  border-top: 1px solid rgba(11, 30, 58, .16);
}

.page-about .about-next__item {
  padding: 28px 24px 28px 0;
  border-bottom: 1px solid rgba(11, 30, 58, .16);
  padding-left: 24px;
  border-left: 1px solid rgba(11, 30, 58, .12);
}

.page-about .about-next__item:first-child {
  padding-left: 0;
  border-left: none;
}

.page-about .about-next__idx {
  display: block;
  font-family: var(--spx-font-data);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--spx-orange);
  margin-bottom: 14px;
}

.page-about .about-next__item h3 {
  font-family: var(--spx-font-head);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--spx-deep);
  margin: 0 0 10px;
}

.page-about .about-next__item p {
  font-size: 15px;
  line-height: 1.78;
  color: #45505f;
  margin: 0;
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  padding: clamp(56px, 8vw, 104px) 0;
}

.page-about .about-close__inner {
  max-width: 820px;
}

.page-about .about-close__eyebrow {
  font-family: var(--spx-font-data);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--spx-lime);
  margin: 0 0 18px;
}

.page-about .about-close h2 {
  font-family: var(--spx-font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.2;
  color: #fff;
  margin: 0 0 18px;
}

.page-about .about-close__lead {
  font-size: 16.5px;
  line-height: 1.8;
  color: rgba(244, 247, 251, .84);
  margin: 0 0 30px;
  max-width: 62ch;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .page-about .about-hero__grid,
  .page-about .about-map__layout,
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-hero__shard {
    width: 70%;
    opacity: .6;
  }

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

  .page-about .about-next__item {
    padding-left: 0;
    border-left: none;
  }
}

@media (max-width: 640px) {
  .page-about {
    --about-rail: 56px;
  }

  .page-about .about-hero {
    padding-top: calc(var(--spx-header-h) + 20px);
  }

  .page-about .about-hero__actions .spx-cta {
    width: 100%;
    text-align: center;
  }

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

  .page-about .about-stats__cell:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-tl::before {
    left: 27px;
  }

  .page-about .about-tl__item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 0 16px;
  }

  .page-about .about-tl__dot {
    left: 21px;
  }

  .page-about .about-tl__year {
    font-size: 14px;
  }

  .page-about .about-tl__stage {
    letter-spacing: .06em;
    font-size: 10px;
  }

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

  .page-about .about-close__actions .spx-cta {
    width: 100%;
    text-align: center;
  }
}