.page-about {
  overflow-x: clip;
}

.page-about .about-hero {
  position: relative;
  padding-top: clamp(96px, 16vw, 168px);
  padding-bottom: clamp(40px, 7vw, 84px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -22% -12% auto;
  height: 72%;
  background:
    radial-gradient(58% 68% at 80% 22%, rgba(34, 211, 238, 0.2), transparent 68%),
    radial-gradient(52% 62% at 10% 4%, rgba(124, 108, 255, 0.16), transparent 72%);
  pointer-events: none;
}

.page-about .hero-arcs {
  position: absolute;
  top: 4%;
  right: -20%;
  width: clamp(300px, 64vw, 620px);
  height: auto;
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1;
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 20px;
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 17ch;
  font-weight: 100;
  font-size: clamp(38px, 9vw, 92px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  max-width: 64ch;
  margin: 0;
  font-size: clamp(16px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .hero-stats li {
  display: grid;
  gap: 6px;
  padding: 18px 16px;
  background: rgba(14, 42, 71, 0.62);
}

.page-about .stat-num {
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 500;
  line-height: 1.1;
  color: var(--cyan-soft);
}

.page-about .hero-stats li:nth-child(3) .stat-num {
  color: var(--coral);
}

.page-about .stat-label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .section-note {
  max-width: 42ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 时间线 ---------- */

.page-about .era-track {
  position: relative;
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(20px, 4vw, 44px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: rgba(14, 42, 71, 0.42);
  overflow: hidden;
}

.page-about .era-track__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  z-index: 0;
  pointer-events: none;
}

.page-about .era-tree-line {
  display: none;
}

.page-about .era-node {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
  padding: clamp(28px, 4vw, 42px) 0;
}

.page-about .era-node + .era-node {
  border-top: 1px solid var(--line-soft);
}

.page-about .era-node:first-of-type {
  padding-top: 0;
}

.page-about .era-node::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 3px;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--coral), var(--coral-soft));
}

.page-about .era-node:first-of-type::before {
  top: 0;
}

.page-about .era-year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(46px, 11vw, 116px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: rgba(234, 242, 248, 0.94);
}

.page-about .era-body h3 {
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .era-body p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 三地内容中心 ---------- */

.page-about .centers-map {
  position: relative;
  margin: clamp(24px, 4vw, 40px) 0;
  height: clamp(150px, 26vw, 200px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background-color: rgba(7, 26, 47, 0.7);
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 8.333% 25%;
  overflow: hidden;
}

.page-about .map-pin {
  position: absolute;
  left: var(--x);
  top: var(--y);
  transform: translate(-50%, -50%);
  display: grid;
  justify-items: center;
  gap: 8px;
  padding-top: 2px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .map-pin::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(34, 211, 238, 0.14);
}

.page-about .map-pin:nth-child(1)::before {
  background: var(--coral);
  box-shadow: 0 0 0 6px rgba(255, 107, 74, 0.16);
}

.page-about .centers-grid {
  display: grid;
  gap: 16px;
}

.page-about .center-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 24px 22px;
}

.page-about .center-city {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .center-role {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .center-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .center-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .centers-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .centers-figure img,
.page-about .flow-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
}

.page-about .centers-figure figcaption {
  margin-top: 12px;
}

/* ---------- 生产流程 ---------- */

.page-about .flow-layout {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .flow-figure {
  margin: 0;
}

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

.page-about .flow-step {
  display: grid;
  gap: 8px;
  padding: 20px 0 20px 22px;
  border-left: 1px solid var(--line);
  position: relative;
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 28px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--deep-900);
  border: 2px solid var(--cyan);
}

.page-about .flow-step:first-child::before {
  border-color: var(--coral);
  background: var(--coral);
}

.page-about .flow-step h3 {
  margin: 0;
  color: var(--paper);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .flow-num {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

/* ---------- 合作生态 ---------- */

.page-about .eco-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(22px, 3vw, 34px) 0 20px;
}

.page-about .eco-chip {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .eco-chip:hover,
.page-about .eco-chip:focus-visible {
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.12);
  color: var(--cyan-soft);
}

.page-about .eco-list {
  display: grid;
  gap: 16px;
}

.page-about .eco-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 26px 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(14, 42, 71, 0.5);
}

.page-about .eco-tag {
  justify-self: start;
}

.page-about .eco-group h3 {
  margin: 0;
  color: var(--paper);
}

.page-about .eco-group > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .eco-points {
  display: grid;
  gap: 8px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .eco-points li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .eco-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 赛季计划 ---------- */

.page-about .next-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .next-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 26px 22px;
}

.page-about .next-num {
  margin: 0;
  font-size: 30px;
  font-weight: 200;
  line-height: 1;
  color: var(--coral-soft);
}

.page-about .next-card h3 {
  margin: 0;
  color: var(--paper);
}

.page-about .next-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 结尾 ---------- */

.page-about .about-cta {
  padding-bottom: clamp(60px, 9vw, 110px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 20px;
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(70% 120% at 88% 0%, rgba(255, 107, 74, 0.16), transparent 70%),
    radial-gradient(60% 110% at 6% 100%, rgba(34, 211, 238, 0.16), transparent 72%),
    rgba(14, 42, 71, 0.6);
}

.page-about .about-cta__inner h2 {
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-cta__inner p {
  margin: 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .section-head {
    align-items: flex-end;
  }

  .page-about .era-node {
    grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(24px, 4vw, 56px);
  }

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

  .page-about .flow-layout {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .flow-figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

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

@media (min-width: 1100px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .era-year {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}
<<<END>>>

.page-about {
  --x: inherit;
  --y: inherit;
}