.page-about {
  --about-hair: rgba(157, 176, 191, .18);
  --about-card: rgba(15, 42, 61, .55);
  --about-card-soft: rgba(15, 42, 61, .34);
}

.page-about > section {
  padding-block: clamp(42px, 6.5vw, 86px);
}
.page-about > .about-hero {
  padding-block: clamp(20px, 3vw, 34px) clamp(46px, 6vw, 80px);
}
.page-about > .about-audience {
  padding-block: clamp(38px, 5.5vw, 70px);
}
.page-about > .about-cta {
  padding-block: clamp(44px, 6.5vw, 92px);
}

/* ---------- 通用小件 ---------- */
.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-head {
  max-width: 720px;
}
.page-about .about-head__title {
  margin: 12px 0 0;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--chalk);
}
.page-about .about-head__text {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(22px, 3vw, 34px);
  font-size: 13px;
  color: var(--mist);
}
.page-about .about-hero .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .about-hero .breadcrumbs__link:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}
.page-about .about-hero .breadcrumbs__sep {
  color: rgba(157, 176, 191, .45);
}
.page-about .about-hero .breadcrumbs__current {
  color: var(--chalk);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(33px, 6.2vw, 60px);
  line-height: 1.04;
  letter-spacing: -.025em;
  color: var(--chalk);
}
.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.9;
  color: var(--mist);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__frame {
  margin: 0;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-700);
}
.page-about .about-hero__frame .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: -58px 0 0;
  padding: 0 clamp(10px, 2vw, 22px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  position: relative;
  z-index: 2;
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 13px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-strong);
  background: rgba(8, 24, 38, .92);
  backdrop-filter: blur(10px);
}
.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(17px, 3.4vw, 26px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}
.page-about .about-stat__unit {
  margin-left: 2px;
  font-size: .48em;
  font-weight: 500;
  color: var(--mist);
}
.page-about .about-stat__label {
  font-size: clamp(10px, 1.6vw, 12px);
  line-height: 1.45;
  color: var(--mist);
}

/* ---------- 阶段轨道 ---------- */
.page-about .about-track {
  display: block;
  max-width: 880px;
  margin-top: clamp(30px, 5vw, 54px);
}
.page-about .about-track__item {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 42px) 52px;
}
.page-about .about-track__item:last-of-type {
  padding-bottom: 0;
}
.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 38px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(20, 200, 194, .5), rgba(20, 200, 194, 0));
}
.page-about .about-track__item:last-of-type::before {
  display: none;
}
.page-about .about-track__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--ink-700);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.page-about .about-track__item:hover .about-track__num {
  border-color: var(--orange);
  color: var(--orange);
}
.page-about .about-track__title {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.8vw, 26px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--chalk);
}
.page-about .about-track__text {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--mist);
}

.page-about .about-track__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 7px 14px 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--cyan);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.page-about .about-track__toggle:hover {
  border-color: var(--cyan);
  background: rgba(20, 200, 194, .08);
}
.page-about .about-track__toggle[aria-expanded="true"] {
  color: var(--orange);
  border-color: rgba(255, 106, 43, .5);
}
.page-about .about-track__toggle .disclosure__sign {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  transition: transform .25s var(--ease);
}
.page-about .about-track__toggle[aria-expanded="true"] .disclosure__sign {
  transform: rotate(45deg);
}

.page-about .about-track__panel {
  margin-top: 14px;
  padding: 16px 18px;
  max-width: 58ch;
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--about-card);
}
.page-about .about-track__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
}

.page-about .about-track__all {
  margin-top: 26px;
  margin-left: 52px;
}

/* ---------- 看台上的人 ---------- */
.page-about .about-audience {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(118deg, rgba(18, 58, 46, .92), rgba(8, 24, 38, .55) 68%),
    var(--ink-900);
}
.page-about .about-audience::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -46%;
  width: 52vw;
  height: 52vw;
  min-width: 260px;
  min-height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20, 200, 194, .22), transparent 68%);
  pointer-events: none;
}
.page-about .about-audience__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 44px);
}
.page-about .about-audience__big {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(56px, 11vw, 104px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.045em;
  color: var(--lime);
}
.page-about .about-audience__big span {
  margin-left: 4px;
  font-size: .4em;
  font-weight: 500;
  color: var(--mist);
}
.page-about .about-audience__title {
  margin: 14px 0 0;
  max-width: 18ch;
  font-size: clamp(21px, 3.2vw, 29px);
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--chalk);
}
.page-about .about-audience__body p {
  margin: 0 0 16px;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.92;
  color: var(--mist);
}
.page-about .about-audience__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 内容与数据 ---------- */
.page-about .about-produce__grid {
  margin-top: clamp(28px, 4.5vw, 52px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}
.page-about .about-flow-wrap {
  overflow-x: auto;
  padding-bottom: 4px;
}
.page-about .about-flow {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}
.page-about .about-flow__box {
  fill: rgba(15, 42, 61, .9);
  stroke: rgba(157, 176, 191, .32);
  stroke-width: 1;
}
.page-about .about-flow__box--accent {
  fill: rgba(255, 106, 43, .14);
  stroke: rgba(255, 106, 43, .48);
}
.page-about .about-flow__label {
  fill: var(--chalk);
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .02em;
}
.page-about .about-flow__arrow {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.5;
  stroke-dasharray: 4 5;
}
.page-about .about-flow__badge {
  fill: rgba(255, 106, 43, .16);
  stroke: rgba(255, 106, 43, .5);
  stroke-width: 1;
}
.page-about .about-flow__badge-text {
  fill: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.page-about .about-flow__tick {
  stroke: rgba(255, 106, 43, .5);
  stroke-width: 1;
  stroke-dasharray: 3 3;
}

.page-about .about-produce__notes {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .about-produce__note {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-produce__note::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 10px;
  border-radius: 2px;
  background: var(--cyan);
}
.page-about .about-produce__note strong {
  display: block;
  margin-bottom: 2px;
  font-size: 15px;
  color: var(--chalk);
}

.page-about .about-states {
  margin-top: 24px;
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  background: rgba(4, 16, 26, .35);
}
.page-about .about-states__caption {
  width: 100%;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-about .about-states__item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--mist);
}
.page-about .about-states__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.page-about .about-states__dot--live {
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(184, 255, 61, .16);
}
.page-about .about-states__dot--sync {
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(20, 200, 194, .16);
}
.page-about .about-states__dot--wait {
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(255, 194, 75, .16);
}

.page-about .about-produce__figure,
.page-about .about-hub__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-700);
}
.page-about .about-produce__figure .media-frame__img,
.page-about .about-hub__figure .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .media-frame__caption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: rgba(4, 16, 26, .6);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 运营中心 ---------- */
.page-about .about-hub__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}
.page-about .about-hub__title {
  margin: 12px 0 0;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--chalk);
}
.page-about .about-hub__text {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mist);
}
.page-about .about-hub__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 12px;
}
.page-about .about-hub__fact {
  padding: 15px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-card-soft);
}
.page-about .about-hub__fact .num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3vw, 26px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}
.page-about .about-hub__fact span:last-child {
  display: block;
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__grid {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
.page-about .about-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--about-card);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.page-about .about-card:hover {
  transform: translateY(-2px);
  border-color: rgba(20, 200, 194, .5);
}
.page-about .about-card .tag {
  align-self: flex-start;
  padding: 4px 10px;
  border: 1px solid rgba(20, 200, 194, .35);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-about .about-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--chalk);
}
.page-about .about-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-partners__foot {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
}
.page-about .about-partners__foot p {
  flex: 1 1 320px;
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 服务标准 ---------- */
.page-about .about-standard__list {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-standard__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-card-soft);
}
.page-about .about-standard__num {
  font-family: var(--font-mono);
  font-size: clamp(21px, 3vw, 29px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}
.page-about .about-standard__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.3;
  color: var(--chalk);
}
.page-about .about-standard__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--mist);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta__inner {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(26px, 4.5vw, 52px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 160% at 8% 0%, rgba(255, 106, 43, .2), transparent 62%),
    linear-gradient(125deg, rgba(20, 200, 194, .13), rgba(8, 24, 38, .96) 58%);
}
.page-about .about-cta__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--chalk);
}
.page-about .about-cta__inner p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-standard__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: center;
  }
  .page-about .about-hero__stats {
    margin-top: -64px;
  }
  .page-about .about-audience__inner {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    align-items: start;
  }
  .page-about .about-produce__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
  .page-about .about-hub__grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: center;
  }
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: center;
  }
}

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