.page-about {
  position: relative;
  background: var(--mq-night);
  color: var(--mq-cream);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(104px, 15vw, 172px) 0 clamp(36px, 6vw, 64px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 8%;
  right: -6%;
  width: 64%;
  height: 72%;
  background:
    repeating-linear-gradient(90deg, rgba(0, 232, 198, .05) 0 1px, transparent 1px 64px),
    linear-gradient(140deg, rgba(0, 232, 198, .16), rgba(255, 122, 47, .07) 58%, transparent 82%);
  transform: rotate(var(--mq-shear));
  pointer-events: none;
}

.page-about .about-hero .breadcrumbs {
  position: relative;
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
  align-items: end;
}

.page-about .about-hero__lead .kicker {
  margin-bottom: 10px;
}

.page-about .about-hero__lead h1 {
  margin: 0 0 20px;
  max-width: 15em;
  font-size: clamp(30px, 7.2vw, 60px);
  line-height: 1.05;
  letter-spacing: -.045em;
}

.page-about .about-hero__lead .prose {
  max-width: 34em;
}

.page-about .about-hero__panel {
  position: relative;
  padding: 26px 24px 30px;
  border-radius: var(--mq-radius);
  border-color: rgba(0, 232, 198, .22);
  overflow: hidden;
}

.page-about .about-hero__panel::after {
  content: "";
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--mq-glow), var(--mq-orange) 70%, transparent);
  opacity: .75;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
  margin: 0;
}

.page-about .about-stats dt {
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mq-mist);
}

.page-about .about-stats dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.4;
  color: var(--mq-cream);
}

.page-about .about-stats .num {
  font-family: var(--mq-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--mq-glow);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  position: relative;
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-chapter__no {
  align-self: start;
  margin: 0;
  font-family: var(--mq-font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(38px, 6vw, 58px);
  line-height: .84;
  letter-spacing: -.05em;
  color: var(--mq-stone);
  transition: color .35s ease, text-shadow .35s ease;
}

.page-about .about-chapter.is-current .about-chapter__no {
  color: var(--mq-glow);
  text-shadow: 0 0 36px rgba(0, 232, 198, .38);
}

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

.page-about .about-chapter__head h2 {
  margin: 10px 0 0;
  max-width: 22em;
  letter-spacing: -.035em;
}

.page-about .about-chapter__head h2 + .prose {
  margin-top: 16px;
}

.page-about .about-teams__lede {
  max-width: 44em;
}

/* ---------- 正文链接 ---------- */

.page-about .prose a {
  color: var(--mq-glow);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(0, 232, 198, .45);
  transition: color .25s ease, text-decoration-color .25s ease;
}

.page-about .prose a:hover {
  color: var(--mq-glow-soft);
  text-decoration-color: var(--mq-glow-soft);
}

/* ---------- 02 职能组 ---------- */

.page-about .about-split {
  display: grid;
  gap: 26px;
}

.page-about .about-split__media,
.page-about .about-teams__figure,
.page-about .about-partners__media {
  margin: 0;
  border-radius: var(--mq-radius);
  overflow: hidden;
  border: 1px solid rgba(30, 74, 60, .9);
  background: var(--mq-ink);
}

.page-about .about-split__media img,
.page-about .about-teams__figure img,
.page-about .about-partners__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-split__media img {
  aspect-ratio: 3 / 2;
}

.page-about .about-teams__figure {
  margin: 0 0 30px;
}

.page-about .about-teams__figure img {
  aspect-ratio: 2 / 1;
}

.page-about .about-partners__media {
  margin: 0 0 30px;
}

.page-about .about-partners__media img {
  aspect-ratio: 14 / 9;
}

.page-about .about-role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-role {
  padding: 24px 22px 26px;
  border-radius: var(--mq-radius);
  background: var(--mq-moss);
  border: 1px solid rgba(30, 74, 60, .95);
  box-shadow: var(--mq-shadow-card);
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 232, 198, .5);
  box-shadow: var(--mq-shadow-lift);
}

.page-about .about-role__idx {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mq-clay);
}

.page-about .about-role h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.025em;
}

.page-about .about-role p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 241, 230, .84);
}

.page-about .about-role__fact {
  margin-top: 16px !important;
  padding-top: 14px;
  border-top: 1px dashed rgba(30, 74, 60, 1);
  font-family: var(--mq-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px !important;
  letter-spacing: .02em;
  color: var(--mq-glow-soft) !important;
}

/* ---------- 03 流程带 ---------- */

.page-about .about-flow {
  display: flex;
  gap: 18px;
  margin: 4px 0 0;
  padding: 30px 0 14px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 232, 198, .32) transparent;
}

.page-about .about-flow::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-flow::-webkit-scrollbar-thumb {
  background: rgba(0, 232, 198, .3);
  border-radius: 3px;
}

.page-about .about-flow__step {
  position: relative;
  flex: 0 0 min(76vw, 252px);
  scroll-snap-align: start;
  padding: 32px 18px 20px;
  border-radius: 14px;
  background: var(--mq-moss);
  border: 1px solid rgba(30, 74, 60, .95);
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.page-about .about-flow__step:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 232, 198, .5);
  box-shadow: var(--mq-shadow-lift);
}

.page-about .about-flow__dot {
  position: absolute;
  top: 15px;
  left: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mq-glow);
  box-shadow: 0 0 0 4px rgba(0, 232, 198, .14);
}

.page-about .about-flow__step::after {
  content: "";
  position: absolute;
  top: 19px;
  left: 36px;
  right: -19px;
  height: 2px;
  background: linear-gradient(90deg, rgba(0, 232, 198, .5), rgba(0, 232, 198, .05));
}

.page-about .about-flow__step:last-child::after {
  display: none;
}

.page-about .about-flow__idx {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mq-clay);
}

.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.page-about .about-flow__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(244, 241, 230, .8);
}

.page-about .about-flow__more {
  max-height: 0;
  margin-top: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .34s ease, opacity .28s ease, margin-top .34s ease;
}

.page-about .about-flow__step:hover .about-flow__more,
.page-about .about-flow__step:focus-within .about-flow__more {
  max-height: 140px;
  margin-top: 12px;
  opacity: 1;
}

.page-about .about-flow__more p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(0, 232, 198, .3);
  font-size: 14px;
  line-height: 1.68;
  color: var(--mq-glow-soft);
}

.page-about .about-flow__note {
  margin: 22px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 241, 230, .78);
}

/* ---------- 04 合作生态 ---------- */

.page-about .about-partner-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-partner {
  padding: 22px 20px 24px;
  border-radius: var(--mq-radius);
  border: 1px solid rgba(30, 74, 60, .9);
  background: linear-gradient(155deg, rgba(15, 52, 42, .8), rgba(8, 26, 21, .92));
}

.page-about .about-partner p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 241, 230, .84);
}

/* ---------- 05 覆盖与承接 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 30px;
  background: rgba(30, 74, 60, .85);
  border: 1px solid rgba(30, 74, 60, .85);
  border-radius: var(--mq-radius);
  overflow: hidden;
}

.page-about .about-metric {
  padding: 22px 18px 24px;
  background: var(--mq-night);
}

.page-about .about-metric dt {
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mq-mist);
}

.page-about .about-metric dd {
  margin: 0;
  font-family: var(--mq-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--mq-glow);
}

.page-about .about-metric dd small {
  margin-left: 6px;
  font-family: var(--mq-font-body);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--mq-cream);
}

.page-about .about-coverage__note {
  max-width: 44em;
}

.page-about .about-coverage__note p + p {
  margin-top: 16px;
}

/* ---------- 06 加入与联络 ---------- */

.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 48px);
  border-radius: calc(var(--mq-radius) + 6px);
  background: linear-gradient(140deg, rgba(15, 52, 42, .96), rgba(8, 26, 21, .99));
  border: 1px solid rgba(0, 232, 198, .28);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -14%;
  width: 48%;
  height: 180%;
  background: linear-gradient(180deg, rgba(0, 232, 198, .12), rgba(255, 122, 47, .05) 62%, transparent 88%);
  transform: rotate(var(--mq-shear));
  pointer-events: none;
}

.page-about .about-cta .kicker,
.page-about .about-cta h2,
.page-about .about-cta .prose,
.page-about .about-cta__actions,
.page-about .about-cta__contact {
  position: relative;
}

.page-about .about-cta h2 {
  margin: 12px 0 16px;
  max-width: 20em;
  letter-spacing: -.035em;
}

.page-about .about-cta .prose {
  max-width: 40em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-cta__contact {
  margin: 26px 0 0;
  font-family: var(--mq-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--mq-mist);
}

/* ---------- 响应式 ---------- */

@media (max-width: 639px) {
  .page-about .about-hero__br {
    display: none;
  }
}

@media (min-width: 700px) {
  .page-about .about-role-grid,
  .page-about .about-partner-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    gap: 56px;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 42px;
  }

  .page-about .about-chapter__no {
    position: sticky;
    top: calc(var(--mq-header-h) + 30px);
    font-size: clamp(52px, 5vw, 74px);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    gap: 38px;
    align-items: start;
  }

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

@media (min-width: 1000px) {
  .page-about .about-chapter__grid {
    grid-template-columns: 156px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-role-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-role:nth-child(1) {
    grid-column: span 7;
  }

  .page-about .about-role:nth-child(2) {
    grid-column: span 5;
  }

  .page-about .about-role:nth-child(3) {
    grid-column: span 5;
  }

  .page-about .about-role:nth-child(4) {
    grid-column: span 7;
  }

  .page-about .about-flow__step {
    flex: 0 0 258px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-chapter__grid {
    grid-template-columns: 184px minmax(0, 1fr);
    gap: 64px;
  }
}