.page-about {
  --about-ink-soft: rgba(26, 22, 20, .62);
  --about-surface: rgba(255, 255, 255, .5);
  background: var(--bs-midnight);
  color: var(--bs-text);
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--bs-header-h, 72px) + clamp(20px, 5vw, 56px)) 0 clamp(30px, 6vw, 64px);
  background:
    radial-gradient(115% 75% at 84% -8%, rgba(77, 240, 224, .20), transparent 58%),
    radial-gradient(90% 70% at 2% 108%, rgba(123, 77, 255, .24), transparent 62%),
    var(--bs-midnight);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(18px, 4vw, 40px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--bs-font-display);
  font-size: clamp(36px, 6.6vw, 84px);
  font-weight: 250;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--bs-cream);
}

.page-about .about-hero__lead .bs-lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 60ch;
  color: var(--bs-text-soft);
}

.page-about .about-hero__brief {
  border: 1px solid var(--bs-line);
  border-radius: var(--bs-radius-lg);
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(160deg, rgba(42, 53, 80, .62), rgba(10, 16, 32, .74));
  backdrop-filter: blur(8px);
}

.page-about .about-brief {
  margin: 14px 0 0;
  display: grid;
}

.page-about .about-brief__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--bs-line);
}

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

.page-about .about-brief dt {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--bs-text-faint);
}

.page-about .about-brief dd {
  margin: 0;
  font-family: var(--bs-font-mono);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--bs-cyan);
}

.page-about .about-hero__media {
  max-width: var(--bs-wrap);
  margin: clamp(30px, 5vw, 60px) auto 0;
  padding: 0 var(--bs-gutter);
}

.page-about .about-hero__media .bs-media__img {
  border-radius: var(--bs-radius-lg);
  overflow: hidden;
  border: 1px solid var(--bs-line);
}

/* ---------- 规模数据带 ---------- */
.page-about .about-figures__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--bs-line);
  border: 1px solid var(--bs-line);
  border-radius: var(--bs-radius);
  overflow: hidden;
}

.page-about .about-figures__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px);
  background: rgba(16, 26, 51, .68);
}

.page-about .about-figures__item .bs-num {
  font-family: var(--bs-font-mono);
  font-weight: 700;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.1;
  color: var(--bs-cyan);
}

.page-about .about-figures__label {
  font-size: 13.5px;
  letter-spacing: .05em;
  color: var(--bs-text-soft);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
}

.page-about .about-timeline__aside .bs-title {
  margin-top: 12px;
}

.page-about .about-timeline__jump {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
}

.page-about .about-timeline__jump a {
  position: relative;
  display: block;
  padding: 9px 0 9px 18px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--bs-text-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--bs-line);
  transition: color .25s ease, padding-left .25s ease;
}

.page-about .about-timeline__jump a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: var(--bs-orange);
}

.page-about .about-timeline__jump a:hover,
.page-about .about-timeline__jump a:focus-visible {
  color: var(--bs-cyan);
  padding-left: 24px;
}

.page-about .about-timeline__rail {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline__rail::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--bs-cyan) 0%, rgba(123, 77, 255, .5) 55%, rgba(77, 240, 224, 0) 100%);
}

.page-about .about-timeline__node {
  position: relative;
  padding-bottom: clamp(26px, 3.6vw, 42px);
}

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

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 9px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--bs-midnight);
  border: 2px solid var(--bs-cyan);
  box-shadow: 0 0 0 4px rgba(77, 240, 224, .12);
  transition: background .35s ease, box-shadow .35s ease;
}

.page-about .about-timeline__node.is-revealed::before {
  background: var(--bs-cyan);
  box-shadow: 0 0 0 6px rgba(77, 240, 224, .2);
}

.page-about .about-timeline__year {
  margin: 0;
  font-family: var(--bs-font-mono);
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: .1em;
  color: var(--bs-orange);
}

.page-about .about-timeline__name {
  margin: 8px 0 0;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--bs-cream);
}

.page-about .about-timeline__node > p:last-child {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--bs-text-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--bs-cream);
  color: var(--bs-ink);
}

.page-about .about-team .bs-title,
.page-about .about-scenes .bs-title {
  color: var(--bs-ink);
}

.page-about .about-team .bs-lede {
  color: var(--bs-ink-soft);
}

.page-about .about-team__head {
  max-width: 68ch;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 44px);
  align-items: center;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--bs-line-ink);
  border: 1px solid var(--bs-line-ink);
  border-radius: var(--bs-radius);
  overflow: hidden;
}

.page-about .about-team__stat {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--about-surface);
}

.page-about .about-team__stat .bs-num {
  display: block;
  font-family: var(--bs-font-mono);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1;
  color: var(--bs-red);
}

.page-about .about-team__stat h3 {
  margin: 10px 0 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--bs-ink);
}

.page-about .about-team__stat p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-team__media .bs-media__img {
  border-radius: var(--bs-radius);
  overflow: hidden;
  border: 1px solid var(--bs-line-ink);
}

.page-about .about-team__media .bs-media__cap {
  color: var(--about-ink-soft);
}

/* ---------- 服务范围 ---------- */
.page-about .about-scope__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.6vw, 64px);
  align-items: start;
}

.page-about .about-scope__aside .bs-title {
  margin-top: 12px;
}

.page-about .about-scope__media {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-about .about-scope__media .bs-media__img {
  border-radius: var(--bs-radius);
  overflow: hidden;
  border: 1px solid var(--bs-line);
}

.page-about .about-scope__list {
  margin: 0;
  padding: 0;
}

.page-about .about-scope__list .bs-index__link {
  padding-top: clamp(14px, 2vw, 20px);
  padding-bottom: clamp(14px, 2vw, 20px);
}

.page-about .about-scope__list .bs-index__no {
  font-family: var(--bs-font-mono);
  font-weight: 700;
  color: var(--bs-orange);
}

.page-about .about-scope__list .bs-index__text {
  color: var(--bs-cream);
}

.page-about .about-scope__list .bs-index__meta {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--bs-text-soft);
}

.page-about .about-scope__list .bs-index__arrow {
  color: var(--bs-cyan);
}

/* ---------- 数据校验 ---------- */
.page-about .about-verify__panel {
  border: 1px solid var(--bs-line-strong);
  border-radius: var(--bs-radius-lg);
  padding: clamp(24px, 4vw, 48px);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(123, 77, 255, .26), transparent 60%),
    linear-gradient(140deg, rgba(42, 53, 80, .62), rgba(10, 16, 32, .76));
  backdrop-filter: blur(10px);
}

.page-about .about-verify__panel .bs-title {
  margin-top: 12px;
}

.page-about .about-verify__panel .bs-lede {
  margin-top: 14px;
  max-width: 70ch;
  color: var(--bs-text-soft);
}

.page-about .about-verify__list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-verify__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.8px;
  line-height: 1.85;
  color: var(--bs-text-soft);
}

.page-about .about-verify__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--bs-cyan);
  box-shadow: 0 0 12px rgba(77, 240, 224, .55);
}

/* ---------- 适用场景 ---------- */
.page-about .about-scenes {
  background: var(--bs-cream);
  color: var(--bs-ink);
}

.page-about .about-scenes__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 4vw, 40px);
  background: var(--bs-line-ink);
  border: 1px solid var(--bs-line-ink);
  border-radius: var(--bs-radius);
  overflow: hidden;
}

.page-about .about-scene {
  padding: clamp(22px, 3vw, 34px);
  background: var(--about-surface);
}

.page-about .about-scene__no {
  margin: 0;
  font-family: var(--bs-font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--bs-red);
}

.page-about .about-scene h3 {
  margin: 12px 0 0;
  font-size: clamp(18px, 2.1vw, 21px);
  font-weight: 600;
  color: var(--bs-ink);
}

.page-about .about-scene p:last-child {
  margin: 10px 0 0;
  font-size: 14.8px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 收尾引导 ---------- */
.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
  align-items: center;
  padding-top: clamp(30px, 5vw, 56px);
  border-top: 1px solid var(--bs-line);
}

.page-about .about-cta__text .bs-muted {
  margin-top: 12px;
  max-width: 62ch;
  color: var(--bs-text-soft);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 800px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
  }

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

  .page-about .about-verify__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: calc(var(--bs-header-h, 72px) + 32px);
  }

  .page-about .about-scope__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) auto;
  }
}

@media (min-width: 1024px) {
  .page-about .about-figures__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__node::before,
  .page-about .about-timeline__jump a {
    transition: none;
  }
}