.page-about {
  --about-rule: 4px;
  --about-pad: 20px;
  position: relative;
  padding-bottom: 72px;
}

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

.page-about .gx-crumbs {
  margin-top: 24px;
}

/* ---------- 首屏 ---------- */

.page-about .about-intro {
  position: relative;
  padding: 28px 0 32px;
  border-bottom: var(--about-rule) solid var(--gx-rail);
}

.page-about .about-intro::after {
  content: "";
  position: absolute;
  top: -30px;
  right: -12px;
  width: min(78vw, 360px);
  height: min(78vw, 360px);
  background:
    radial-gradient(circle at 62% 38%, rgba(111, 77, 245, 0.34), transparent 62%),
    radial-gradient(circle at 28% 72%, rgba(53, 227, 210, 0.16), transparent 58%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-intro > * {
  position: relative;
  z-index: 1;
}

.page-about .about-intro__title {
  margin: 12px 0 0;
  max-width: 20ch;
  font-size: clamp(2.125rem, 10vw, 5.25rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--gx-dust);
}

.page-about .about-intro__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--gx-mist);
  font-size: var(--gx-fs-16);
  line-height: 1.75;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 26px 0 0;
}

.page-about .about-fact {
  border: 3px solid var(--gx-rail);
  background: var(--gx-hull);
  padding: 12px 14px;
  min-width: 0;
}

.page-about .about-fact__label {
  margin: 0;
  font-family: var(--gx-font-mono);
  font-size: var(--gx-fs-12);
  letter-spacing: 0.08em;
  color: var(--gx-mist);
}

.page-about .about-fact__val {
  margin: 6px 0 0;
  font-size: var(--gx-fs-24);
  font-weight: 300;
  color: var(--gx-gold);
  letter-spacing: -0.01em;
}

/* ---------- 顶部轨道图 ---------- */

.page-about .about-track {
  margin: 24px 0 0;
  border: 3px solid var(--gx-rail);
  background: var(--gx-hull);
  overflow: hidden;
}

.page-about .about-track img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 1;
  object-fit: cover;
}

/* ---------- 通用章节间距 ---------- */

.page-about .gx-section {
  padding-top: 56px;
}

.page-about .gx-section__title {
  text-wrap: balance;
}

.page-about .about-why__grid,
.page-about .about-team-sec__lead,
.page-about .about-axis__layout,
.page-about .about-check__stage,
.page-about .about-stat-grid,
.page-about .about-next__list,
.page-about .about-cta {
  margin-top: 22px;
}

/* ---------- 01 为什么 ---------- */

.page-about .about-why__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-why__aside {
  border: 3px solid var(--gx-nebula);
  background: linear-gradient(150deg, rgba(111, 77, 245, 0.22), rgba(6, 10, 28, 0.9) 68%);
  padding: 20px 18px;
  box-shadow: var(--gx-shadow-hard);
}

.page-about .about-why__quote {
  margin: 0;
  padding-left: 14px;
  border-left: 6px solid var(--gx-beam);
  font-size: var(--gx-fs-18);
  line-height: 1.55;
  color: var(--gx-dust);
}

.page-about .about-why__note {
  margin: 16px 0 0;
  font-size: var(--gx-fs-14);
  line-height: 1.75;
  color: var(--gx-mist);
}

/* ---------- 02 团队 ---------- */

.page-about .about-team-sec__lead {
  max-width: 66ch;
  color: var(--gx-mist);
  font-size: var(--gx-fs-16);
  line-height: 1.75;
}

.page-about .about-team {
  display: grid;
  gap: 20px;
  margin-top: 20px;
}

.page-about .about-team__tabs {
  min-width: 0;
}

.page-about .gx-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .gx-tabs__tab {
  border: 3px solid var(--gx-rail);
  background: var(--gx-hull);
  color: var(--gx-mist);
  font-size: var(--gx-fs-14);
  padding: 9px 14px;
  cursor: pointer;
  transition: color 180ms var(--gx-ease), border-color 180ms var(--gx-ease), background-color 180ms var(--gx-ease);
}

.page-about .gx-tabs__tab:hover,
.page-about .gx-tabs__tab:focus-visible {
  color: var(--gx-beam);
  border-color: var(--gx-beam);
}

.page-about .gx-tabs__tab[aria-selected="true"] {
  background: var(--gx-nebula);
  border-color: var(--gx-nebula);
  color: var(--gx-dust);
}

.page-about .about-team__panel {
  border: 3px solid var(--gx-rail);
  border-top: 6px solid var(--gx-nebula);
  background: var(--gx-hull);
  padding: 20px 18px;
  margin-top: 14px;
  min-width: 0;
}

.page-about .about-team__count {
  margin: 0;
  font-family: var(--gx-font-mono);
  font-size: var(--gx-fs-12);
  letter-spacing: 0.08em;
  color: var(--gx-mist);
}

.page-about .about-team__count strong {
  font-family: var(--gx-font-display);
  font-size: var(--gx-fs-24);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--gx-beam);
}

.page-about .about-team__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 20px;
  font-size: var(--gx-fs-16);
  line-height: 1.75;
  color: var(--gx-dust);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 3px;
  background: var(--gx-beam);
}

.page-about .about-team__art {
  border: 3px solid var(--gx-rail);
  background: var(--gx-hull);
  margin: 0;
}

/* ---------- 03 时间轴 ---------- */

.page-about .about-axis__side {
  min-width: 0;
}

.page-about .about-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: var(--about-rule) solid var(--gx-rail);
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: calc(var(--about-rule) * -1);
  padding: 10px 14px;
  border-left: var(--about-rule) solid transparent;
  font-size: var(--gx-fs-14);
  color: var(--gx-mist);
  text-decoration: none;
  transition: color 180ms var(--gx-ease), border-color 180ms var(--gx-ease), background-color 180ms var(--gx-ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--gx-dust);
  border-left-color: var(--gx-gold);
  background: rgba(111, 77, 245, 0.14);
}

.page-about .about-index__num {
  font-family: var(--gx-font-mono);
  font-size: var(--gx-fs-12);
  letter-spacing: 0.1em;
  color: var(--gx-nebula);
}

.page-about .about-axis__body {
  min-width: 0;
}

.page-about .about-phase {
  position: relative;
  border: 3px solid var(--gx-rail);
  background: var(--gx-hull);
  padding: 22px 18px;
  margin-bottom: 18px;
  box-shadow: 6px 12px 0 rgba(42, 55, 102, 0.45);
}

.page-about .about-phase:last-child {
  margin-bottom: 0;
}

.page-about .about-phase__num {
  display: inline-block;
  font-family: var(--gx-font-mono);
  font-size: var(--gx-fs-12);
  letter-spacing: 0.12em;
  color: var(--gx-beam);
  border: 2px solid var(--gx-rail);
  padding: 3px 8px;
}

.page-about .about-phase__quote {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 6px solid var(--gx-nebula);
  font-size: var(--gx-fs-18);
  line-height: 1.55;
  color: var(--gx-dust);
}

.page-about .about-phase__title {
  margin: 14px 0 0;
  font-size: var(--gx-fs-24);
  font-weight: 600;
  line-height: 1.35;
  color: var(--gx-dust);
}

.page-about .about-phase .gx-prose {
  margin: 10px 0 0;
  color: var(--gx-mist);
  font-size: var(--gx-fs-16);
  line-height: 1.75;
}

/* ---------- 04 三道检查 ---------- */

.page-about .about-check__stage {
  position: relative;
  border: 3px solid var(--gx-rail);
  background: var(--gx-hull);
  overflow: hidden;
}

.page-about .about-check__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  pointer-events: none;
}

.page-about .about-check__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 18px 16px;
  display: grid;
  gap: 14px;
}

.page-about .about-check__item {
  border: 3px solid var(--gx-rail);
  background: rgba(6, 10, 28, 0.88);
  padding: 16px 16px 18px;
  border-left: 6px solid var(--gx-beam);
}

.page-about .about-check__num {
  font-family: var(--gx-font-mono);
  font-size: var(--gx-fs-12);
  letter-spacing: 0.12em;
  color: var(--gx-gold);
}

.page-about .about-check__name {
  margin: 8px 0 0;
  font-size: var(--gx-fs-18);
  font-weight: 600;
  color: var(--gx-dust);
}

.page-about .about-check__item p {
  margin: 8px 0 0;
  font-size: var(--gx-fs-16);
  line-height: 1.75;
  color: var(--gx-mist);
}

/* ---------- 05 覆盖范围 ---------- */

.page-about .about-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-stat {
  border: 3px solid var(--gx-rail);
  background: linear-gradient(160deg, rgba(14, 23, 56, 0.96), rgba(6, 10, 28, 0.96) 62%);
  padding: 18px 16px 20px;
  min-width: 0;
  transition: transform 180ms var(--gx-ease), border-color 180ms var(--gx-ease);
}

.page-about .about-stat:hover {
  border-color: var(--gx-nebula);
  transform: translate(-3px, -3px);
}

.page-about .about-stat__num {
  margin: 0;
  font-size: clamp(2.5rem, 13vw, 4.25rem);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gx-dust);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__pct {
  font-size: 0.5em;
  color: var(--gx-beam);
  margin-left: 2px;
}

.page-about .about-stat__unit {
  margin: 10px 0 0;
  font-size: var(--gx-fs-14);
  letter-spacing: 0.04em;
  color: var(--gx-gold);
}

.page-about .about-stat__note {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 2px solid var(--gx-rail);
  font-size: var(--gx-fs-14);
  line-height: 1.7;
  color: var(--gx-mist);
}

/* ---------- 06 接下来一年 ---------- */

.page-about .about-next__list {
  display: grid;
  gap: 14px;
}

.page-about .about-next__item {
  border: 3px solid var(--gx-rail);
  background: var(--gx-hull);
  padding: 18px 16px;
  border-top: 1px solid transparent;
  background-image: linear-gradient(var(--gx-hull), var(--gx-hull)),
    linear-gradient(90deg, var(--gx-nebula), var(--gx-beam));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  border-top-width: 6px;
  min-width: 0;
}

.page-about .about-next__name {
  margin: 0;
  font-size: var(--gx-fs-18);
  font-weight: 600;
  line-height: 1.4;
  color: var(--gx-dust);
}

.page-about .about-next__item p {
  margin: 10px 0 0;
  font-size: var(--gx-fs-16);
  line-height: 1.75;
  color: var(--gx-mist);
}

.page-about .about-cta {
  border: 3px solid var(--gx-rail);
  background: linear-gradient(140deg, rgba(111, 77, 245, 0.2), rgba(6, 10, 28, 0.95) 70%);
  padding: 22px 18px;
  margin-top: 26px;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 58ch;
  font-size: var(--gx-fs-16);
  line-height: 1.75;
  color: var(--gx-dust);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-about .about-cta__actions .gx-btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about {
    --about-pad: 32px;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-check__list {
    padding: 24px 22px;
    gap: 18px;
  }

  .page-about .about-stat-grid {
    gap: 18px;
  }

  .page-about .about-next__list {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .page-about .about-phase {
    padding: 26px 24px;
  }
}

@media (min-width: 900px) {
  .page-about .gx-section {
    padding-top: 72px;
  }

  .page-about .about-why__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-axis__layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-axis__body {
    position: relative;
    padding-left: 40px;
  }

  .page-about .about-axis__body::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    bottom: 10px;
    width: var(--about-rule);
    background: linear-gradient(180deg, var(--gx-nebula), var(--gx-beam));
  }

  .page-about .about-phase::before {
    content: "";
    position: absolute;
    left: -46px;
    top: 36px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 4px solid var(--gx-void);
    background: var(--gx-beam);
    box-shadow: 0 0 0 4px rgba(53, 227, 210, 0.18);
  }

  .page-about .about-stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 28px 26px;
  }

  .page-about .about-cta__actions {
    margin-top: 0;
    flex: 0 0 auto;
  }
}

@media (min-width: 1100px) {
  .page-about .about-check__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding: 28px 26px;
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .gx-tabs__tab,
  .page-about .about-index__link,
  .page-about .about-stat {
    transition-duration: 120ms;
  }

  .page-about .about-stat:hover {
    transform: none;
  }
}