.page-about {
  --about-panel: rgba(255, 255, 255, .045);
  --about-panel-soft: rgba(0, 230, 195, .07);
  --about-ink-soft: rgba(23, 18, 14, .72);
  --about-cut: 26px;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 4vw, 44px) 0 clamp(52px, 7vw, 88px);
  background:
    radial-gradient(880px 520px at 80% -12%, rgba(0, 230, 195, .17), transparent 62%),
    radial-gradient(680px 460px at 4% 22%, rgba(45, 108, 255, .18), transparent 66%),
    linear-gradient(158deg, var(--deep) 0%, var(--deep-2) 56%, var(--night) 100%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
}

.page-about .about-hero__kicker {
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.6vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -.03em;
  color: var(--cream);
}

.page-about .about-hero__title-em {
  display: block;
  color: var(--cyan-soft);
  font-style: normal;
}

.page-about .about-hero__sub {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 56ch;
  font-size: clamp(.95rem, 1.5vw, 1.06rem);
  line-height: 1.78;
  color: var(--mist);
}

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

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

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border-radius: var(--radius-a) var(--radius-b) var(--radius-a) var(--radius-b);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
}

.page-about .about-hero__cap {
  margin-top: 12px;
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-a);
  overflow: hidden;
}

.page-about .about-hero__facts > li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: linear-gradient(160deg, rgba(7, 26, 51, .92), rgba(26, 15, 51, .92));
}

.page-about .about-hero__facts .num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-hero__fact-label {
  font-size: .8rem;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 米白阅读面板 ---------- */
.page-about .about-paper {
  background: var(--cream);
  color: var(--ink);
}

.page-about .about-paper .label {
  color: rgba(23, 18, 14, .55);
}

.page-about .about-paper a {
  color: var(--coral);
}

/* ---------- 平台定位 ---------- */
.page-about .about-position__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-position__index {
  margin: 0 0 12px;
}

.page-about .about-position__heading {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-position__body p {
  margin: 0 0 16px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

.page-about .about-position__body .about-lead {
  font-size: clamp(1rem, 1.7vw, 1.12rem);
  color: var(--ink);
}

.page-about .about-checks {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-checks li {
  position: relative;
  padding-left: 26px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 12px;
  height: 2px;
  background: var(--coral);
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  background:
    radial-gradient(700px 420px at 88% 0%, rgba(0, 230, 195, .12), transparent 64%),
    var(--deep);
  color: var(--cream);
}

.page-about .about-scale .section-head__title,
.page-about .about-scale .section-head__sub,
.page-about .about-scale .section-head__index {
  color: var(--cream);
}

.page-about .about-scale .section-head__sub {
  color: var(--mist);
}

.page-about .about-metrics {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-a);
  overflow: hidden;
}

.page-about .about-metrics__cell {
  padding: clamp(20px, 3vw, 28px);
  background: var(--about-panel);
}

.page-about .about-metrics__num {
  margin: 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.7rem, 4.2vw, 2.5rem);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-metrics__name {
  margin: 10px 0 6px;
  font-weight: 700;
  font-size: .98rem;
  color: var(--cream);
}

.page-about .about-metrics__note {
  margin: 0;
  font-size: .84rem;
  line-height: 1.66;
  color: var(--mist);
}

.page-about .about-reach {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 28px;
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 28px);
  border-left: 3px solid var(--coral);
  background: var(--about-panel-soft);
  border-radius: 0 var(--radius-a) var(--radius-a) 0;
}

.page-about .about-reach__text {
  flex: 1 1 320px;
  margin: 0;
  line-height: 1.78;
  color: var(--cream);
}

.page-about .about-reach__chip {
  flex: 0 0 auto;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-section {
  background: linear-gradient(180deg, var(--deep-2) 0%, var(--night) 48%, var(--night-2) 100%);
  color: var(--cream);
}

.page-about .about-timeline-head .section-head__title,
.page-about .about-timeline-head .section-head__index {
  color: var(--cream);
}

.page-about .about-timeline__figure {
  margin: 0 0 clamp(28px, 5vw, 48px);
}

.page-about .about-timeline__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  border-radius: var(--radius-a) var(--radius-b) var(--radius-a) var(--radius-b);
  opacity: .82;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 6px 0 6px 30px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(0, 230, 195, .16) 78%, transparent 100%);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding-bottom: clamp(26px, 4vw, 40px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
}

.page-about .about-timeline__item--now::before {
  background: var(--coral);
  border-color: var(--coral);
  box-shadow: 0 0 0 6px rgba(255, 107, 74, .18);
}

.page-about .about-timeline__year {
  margin: 0;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-timeline__year--text {
  font-family: var(--font-body);
  font-size: .82rem;
  letter-spacing: .14em;
  color: var(--cyan-soft);
}

.page-about .about-timeline__item--now .about-timeline__year {
  color: var(--coral);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-about .about-timeline__content p {
  margin: 0;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-team__index {
  margin: 0 0 12px;
}

.page-about .about-team__heading {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-team__body p {
  margin: 0 0 16px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

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

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: var(--radius-b) var(--radius-a) var(--radius-b) var(--radius-a);
  border: 1px solid var(--line-dark);
}

.page-about .about-team__cap {
  margin-top: 10px;
  font-size: .78rem;
  letter-spacing: .04em;
  color: rgba(23, 18, 14, .55);
}

/* ---------- 为什么选择 ---------- */
.page-about .about-why {
  background:
    radial-gradient(640px 400px at 12% 8%, rgba(26, 15, 51, .9), transparent 68%),
    var(--deep);
  color: var(--cream);
}

.page-about .about-why .section-head__title,
.page-about .about-why .section-head__index {
  color: var(--cream);
}

.page-about .about-why__grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-why__card {
  padding: clamp(20px, 3vw, 28px);
  background: var(--about-panel);
  border: 1px solid var(--line);
}

.page-about .about-why__no {
  margin: 0 0 12px;
  color: var(--coral);
}

.page-about .about-why__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-about .about-why__card p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-why__foot {
  margin: clamp(24px, 4vw, 36px) 0 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-why__foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作与生态 ---------- */
.page-about .about-partners__head {
  max-width: 62ch;
}

.page-about .about-partners__index {
  margin: 0 0 12px;
}

.page-about .about-partners__heading {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-partners__sub {
  margin: 0;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-a);
  overflow: hidden;
}

.page-about .about-partner {
  padding: clamp(20px, 3vw, 28px);
  background: var(--cream);
  transition: background .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-partner:hover {
  background: #fff;
  transform: translateY(-4px);
}

.page-about .about-partner__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.04rem;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-partner p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .about-partners__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
  margin-top: clamp(26px, 4vw, 38px);
  padding-top: clamp(22px, 3vw, 30px);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-partners__cta p {
  flex: 1 1 300px;
  margin: 0;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-position__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-timeline {
    padding-left: 42px;
  }

  .page-about .about-timeline::before {
    left: 8px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 0 28px;
    align-items: start;
  }

  .page-about .about-timeline__item::before {
    left: -42px;
  }

  .page-about .about-timeline__year {
    padding-top: 2px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner,
  .page-about .about-partner:hover {
    transition: none;
    transform: none;
  }
}