.page-about {
  --ab-card: #16204a;
  --ab-hair: rgba(43, 58, 102, .62);
  --ab-amber-soft: rgba(255, 194, 75, .16);
}

.page-about .nx-crumb {
  padding-top: 28px;
  color: var(--nx-mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(20px, 3.6vw, 44px);
  padding-bottom: clamp(44px, 7vw, 96px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -28%;
  right: -14%;
  width: min(74vw, 760px);
  height: min(74vw, 760px);
  border-radius: 46% 54% 62% 38% / 52% 42% 58% 48%;
  background:
    radial-gradient(circle at 34% 34%, rgba(180, 76, 240, .48), transparent 62%),
    radial-gradient(circle at 68% 58%, rgba(242, 65, 142, .32), transparent 60%),
    radial-gradient(circle at 24% 76%, rgba(63, 224, 208, .2), transparent 58%);
  filter: blur(8px);
  pointer-events: none;
  z-index: 0;
  animation: about-drift 20s ease-in-out infinite alternate;
}

@keyframes about-drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-3%, 5%, 0) scale(1.07); }
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .about-hero__title {
  margin: 16px 0 20px;
  font-size: clamp(36px, 8vw, 86px);
  line-height: .98;
  letter-spacing: -.025em;
  font-weight: 300;
  color: var(--nx-paper);
}

.page-about .about-hero__mark {
  font-weight: 800;
  color: var(--nx-cyan);
  background: linear-gradient(96deg, var(--nx-cyan), var(--nx-orange));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0 0 28px;
}

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

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--ab-hair);
  align-self: end;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px 20px;
  background: var(--nx-panel);
}

.page-about .about-stat__label {
  margin: 0;
  color: var(--nx-mist);
}

.page-about .about-stat__num {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--nx-paper);
}

.page-about .about-stat__num em {
  font-style: normal;
  margin-left: 4px;
  font-size: .48em;
  color: var(--nx-mist);
}

.page-about .about-stat:first-child .about-stat__num {
  color: var(--nx-orange);
}

/* ---------- 区块标题 ---------- */
.page-about .about-head {
  max-width: 760px;
  margin-bottom: clamp(28px, 5vw, 52px);
}

.page-about .about-head h2 {
  margin: 14px 0 16px;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 700;
  color: var(--nx-paper);
}

.page-about .about-head .nx-lede {
  margin: 0;
}

/* ---------- 图片块 ---------- */
.page-about .about-shot,
.page-about .about-team__figure,
.page-about .about-network__figure {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-about .about-network__figure {
  margin-bottom: 0;
}

.page-about .about-shot img,
.page-about .about-team__figure img,
.page-about .about-network__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 22px 22px 22px 6px;
  background: var(--nx-panel);
}

.page-about .about-shot figcaption,
.page-about .about-team__figure figcaption,
.page-about .about-network__figure figcaption {
  margin-top: 12px;
  font-family: var(--nx-mono-font);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--nx-mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-axis {
  list-style: none;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--nx-line);
  display: grid;
  gap: clamp(30px, 4vw, 48px);
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  top: 9px;
  left: -32px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--nx-amber);
  box-shadow: 0 0 0 5px var(--ab-amber-soft);
}

.page-about .about-node__year {
  display: inline-block;
  padding: 3px 10px 4px;
  font-family: var(--nx-mono-font);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--nx-amber);
  border: 1px solid rgba(255, 194, 75, .35);
  border-radius: 999px;
}

.page-about .about-node h3 {
  margin: 12px 0 8px;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--nx-paper);
}

.page-about .about-node > p {
  margin: 0;
  max-width: 68ch;
  color: var(--nx-mist);
  line-height: 1.78;
}

.page-about .about-node__more {
  margin-top: 14px;
}

.page-about .about-node__more summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-family: var(--nx-mono-font);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--nx-cyan);
}

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

.page-about .about-node__more summary::after {
  content: "+";
  font-size: 15px;
  line-height: 1;
  transition: transform .25s var(--nx-ease);
}

.page-about .about-node__more[open] summary::after {
  transform: rotate(45deg);
}

.page-about .about-node__more p {
  margin: 10px 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--nx-line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--nx-mist);
  max-width: 62ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
}

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

.page-about .about-card {
  position: relative;
  padding: 24px 22px 22px;
  background: var(--nx-panel);
  border-radius: 28px 28px 28px 6px;
  outline: none;
  transition: background .3s var(--nx-ease), transform .3s var(--nx-ease);
}

.page-about .about-card::after {
  content: "";
  position: absolute;
  top: 22px;
  right: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--nx-cyan);
  opacity: .7;
}

.page-about .about-card:hover,
.page-about .about-card:focus-visible {
  background: var(--ab-card);
  transform: translateY(-4px);
}

.page-about .about-card h3 {
  margin: 12px 0 10px;
  font-size: 19px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--nx-paper);
  max-width: 22ch;
}

.page-about .about-card__base {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--nx-mist);
}

.page-about .about-card__more {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--nx-cyan);
}

/* ---------- 内容生产流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .about-flow__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .about-flow__num {
  font-family: var(--nx-mono-font);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--nx-cyan);
}

.page-about .about-flow__name {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--nx-paper);
}

.page-about .about-flow__desc {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--nx-mist);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-cities {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-city {
  background: var(--nx-panel);
  border-radius: 20px 20px 20px 4px;
  padding: 4px 20px;
  transition: background .25s var(--nx-ease);
}

.page-about .about-city:hover {
  background: var(--ab-card);
}

.page-about .about-city > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-city > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-city__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--nx-paper);
}

.page-about .about-city__tag {
  font-family: var(--nx-mono-font);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--nx-cyan);
  border: 1px solid rgba(63, 224, 208, .38);
  border-radius: 999px;
  padding: 3px 9px;
  white-space: nowrap;
}

.page-about .about-city__detail {
  margin: 0;
  padding: 0 0 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--nx-mist);
}

/* ---------- 合作与资质 ---------- */
.page-about .about-records {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-record {
  padding: 22px 22px 24px;
}

.page-about .about-record__num {
  margin: 12px 0 8px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--nx-orange);
}

.page-about .about-record__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--nx-mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__inner {
  padding: clamp(28px, 5vw, 52px) clamp(22px, 4vw, 48px);
  background:
    radial-gradient(circle at 88% 12%, rgba(180, 76, 240, .34), transparent 56%),
    radial-gradient(circle at 8% 92%, rgba(63, 224, 208, .16), transparent 52%),
    var(--nx-panel);
  border-radius: 34px 34px 34px 8px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-cta__text h2 {
  margin: 14px 0 12px;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.14;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--nx-paper);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 52ch;
  color: var(--nx-mist);
  line-height: 1.76;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 宽屏 ---------- */
@media (min-width: 760px) {
  .page-about .about-flow__item {
    grid-template-columns: 64px minmax(0, 1fr) minmax(0, 2fr);
    align-items: baseline;
    gap: 8px 24px;
    padding: 26px 0;
  }

  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-records {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
  }

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

  .page-about .about-axis {
    padding-left: 40px;
  }

  .page-about .about-node::before {
    left: -46px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .86fr) minmax(0, 1.6fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    margin-bottom: 0;
    position: sticky;
    top: 96px;
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-node > p {
    font-size: 17px;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero::before {
    animation: none;
  }

  .page-about .about-card,
  .page-about .about-node__more summary::after {
    transition: none;
  }

  .page-about .about-card:hover,
  .page-about .about-card:focus-visible {
    transform: none;
  }
}