.page-about {
  --about-tint: rgba(0, 229, 255, .08);
  --about-line: rgba(0, 229, 255, .24);
  --about-warm: rgba(255, 107, 26, .12);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-about .about-crumb {
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: .06em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  padding-block: clamp(20px, 3.5vw, 38px) clamp(36px, 6vw, 76px);
  background:
    radial-gradient(75% 62% at 12% 0%, rgba(0, 229, 255, .09), transparent 68%),
    radial-gradient(52% 52% at 96% 6%, rgba(255, 107, 26, .09), transparent 70%);
}

.page-about .about-hero__label {
  color: var(--stone);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(31px, 5.4vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--cream);
  max-width: 15ch;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--text-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  align-self: start;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  background: var(--surface-deep);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 6vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-hero__cap {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 平台在做什么 ---------- */
.page-about .about-brief {
  padding-block: clamp(34px, 6vw, 78px);
  background: linear-gradient(180deg, rgba(46, 74, 60, .30), transparent 78%);
}

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

.page-about .about-brief__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.5vw, 36px);
  line-height: 1.28;
  letter-spacing: -0.005em;
  color: var(--cream);
}

.page-about .about-brief__p {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-brief__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-brief__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-brief__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-about .about-brief__list strong {
  color: var(--cream);
  font-weight: 700;
}

.page-about .about-brief__figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--surface-deep);
}

.page-about .about-brief__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-brief__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(0, 229, 255, .16), transparent 46%, rgba(255, 107, 26, .18));
  pointer-events: none;
}

.page-about .about-brief__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 26px 18px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-soft);
  background: linear-gradient(0deg, rgba(6, 20, 16, .92), transparent);
  writing-mode: horizontal-tb;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  padding-block: clamp(38px, 6vw, 88px);
}

.page-about .about-timeline__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .about-timeline__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  color: var(--cream);
}

.page-about .about-timeline__intro {
  margin: 16px 0 0;
  max-width: 32ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-timeline__vt {
  margin-top: 22px;
  opacity: .72;
}

.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(0, 229, 255, .32) 46%, rgba(0, 229, 255, .05) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 34px;
}

.page-about .about-tl__dot {
  position: absolute;
  left: 3px;
  top: 20px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 0 3px rgba(6, 20, 16, .92), 0 0 14px rgba(245, 211, 0, .45);
}

.page-about .about-tl__box {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface-deep);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-tl__box:hover {
  border-color: var(--about-line);
}

.page-about .about-tl__box[open] {
  border-color: var(--about-line);
  background: rgba(46, 74, 60, .44);
}

.page-about .about-tl__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 13px 16px;
  list-style: none;
  cursor: pointer;
  color: var(--cream);
}

.page-about .about-tl__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-tl__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-tl__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1;
  letter-spacing: .12em;
  padding: 5px 9px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-pill);
  color: var(--cyan);
}

.page-about .about-tl__name {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: .01em;
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  color: var(--stone);
}

.page-about .about-tl__panel {
  padding: 0 16px 18px;
  border-top: 1px dashed var(--line);
}

.page-about .about-tl__panel p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 数据来源 ---------- */
.page-about .about-data {
  padding-block: clamp(36px, 6vw, 84px);
  background:
    linear-gradient(90deg, rgba(0, 229, 255, .05), transparent 58%),
    linear-gradient(180deg, transparent, rgba(6, 20, 16, .55));
}

.page-about .about-data__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.5vw, 36px);
  line-height: 1.28;
  color: var(--cream);
}

.page-about .about-data__lead {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-data__grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .about-data__figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  align-self: start;
}

.page-about .about-data__figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 200px;
  aspect-ratio: 15 / 9;
  object-fit: cover;
}

.page-about .about-data__cards {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .about-data__card {
  border-left: 2px solid var(--cyan);
  padding: 2px 0 2px 20px;
}

.page-about .about-data__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 7vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .about-data__unit {
  margin-left: 6px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--stone);
}

.page-about .about-data__desc h3 {
  margin: 12px 0 0;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-data__desc p {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(38px, 6vw, 84px);
  background: linear-gradient(180deg, rgba(46, 74, 60, .26), transparent 82%);
}

.page-about .about-team__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.5vw, 36px);
  line-height: 1.28;
  color: var(--cream);
}

.page-about .about-team__lead {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-team__grid {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-about .about-team__card {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  overflow: hidden;
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 255, .1) 62%, transparent);
}

.page-about .about-team__tag-vert {
  color: var(--stone);
  opacity: .8;
}

.page-about .about-team__card h3 {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-team__card p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-team__tags-wrap {
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-team__tags-note {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--text-dim);
}

.page-about .about-team__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-team__tag {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--text-soft);
  cursor: default;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-team__tag:hover,
.page-about .about-team__tag:focus-visible {
  color: var(--cream);
  border-color: var(--about-line);
  background: var(--about-tint);
  outline: none;
}

.page-about .about-team__tag::after {
  content: attr(data-duty);
  position: absolute;
  left: 0;
  top: calc(100% + 9px);
  z-index: 6;
  width: max-content;
  max-width: min(240px, 72vw);
  padding: 9px 11px;
  border-radius: 12px;
  border: 1px solid var(--about-line);
  background: var(--night);
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .01em;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  pointer-events: none;
}

.page-about .about-team__tag:hover::after,
.page-about .about-team__tag:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach {
  padding-block: clamp(36px, 6vw, 84px);
}

.page-about .about-reach__figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
}

.page-about .about-reach__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-reach__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 20, 16, .18), rgba(6, 20, 16, .78));
  pointer-events: none;
}

.page-about .about-reach__body {
  margin-top: clamp(24px, 4vw, 46px);
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-reach__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.5vw, 36px);
  line-height: 1.28;
  color: var(--cream);
}

.page-about .about-reach__lead {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

.page-about .about-reach__stat {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface-deep);
}

.page-about .about-reach__stat b {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(38px, 9vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-reach__unit {
  margin-left: 4px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--stone);
}

.page-about .about-reach__stat span:not(.about-reach__unit) {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--stone);
}

.page-about .about-reach__stat p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 长期收益 ---------- */
.page-about .about-long {
  padding-block: clamp(38px, 6vw, 88px) clamp(46px, 7vw, 96px);
}

.page-about .about-long__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-long__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: none;
}

.page-about .about-long__item {
  position: relative;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-long__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .about-long__item h3 {
  margin: 10px 0 0;
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--cream);
}

.page-about .about-long__item p {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-long__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 4vw, 40px);
}

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

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .about-brief__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

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

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

  .page-about .about-reach__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

  .page-about .about-long__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(20px, 3vw, 36px);
  }

  .page-about .about-long__item {
    border-top: 1px solid var(--line);
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 2fr);
    align-items: start;
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: 104px;
  }

  .page-about .about-reach__stat b {
    font-size: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__box,
  .page-about .about-team__tag,
  .page-about .about-team__tag::after {
    transition: none;
  }
}