.page-about {
  position: relative;
  background: var(--night);
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 52px) 0 clamp(48px, 8vw, 88px);
  border-bottom: 1px solid var(--line-faint);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(115% 90% at 88% 0%, rgba(59, 44, 110, .55), transparent 62%),
    radial-gradient(85% 80% at 2% 100%, rgba(37, 245, 194, .10), transparent 58%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin: 0 0 clamp(20px, 4vw, 34px);
}

.page-about .about-hero .eyebrow {
  margin: 0;
}

.page-about .about-hero__title {
  margin: clamp(12px, 2vw, 18px) 0 0;
  max-width: 15em;
  font-size: clamp(33px, 7vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-about .about-hero__lead {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(233, 245, 243, .84);
}

.page-about .stat-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 4vw, 34px) clamp(16px, 3vw, 28px);
  margin: clamp(34px, 5vw, 54px) 0 0;
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line);
}

.page-about .stat-strip dt,
.page-about .stat-strip dd {
  margin: 0;
}

.page-about .stat-label {
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .stat-num {
  margin-top: 8px;
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.8vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .stat-unit {
  margin-left: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--slate);
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  position: relative;
  padding: clamp(44px, 7vw, 88px) 0;
  border-top: 1px solid var(--line-faint);
}

.page-about .chapter:first-of-type {
  border-top: 0;
}

.page-about .chapter > .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 3vw, 22px);
}

.page-about .chapter__aside {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .chapter__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--neon);
}

.page-about .chapter__label {
  font-size: 13px;
  letter-spacing: .26em;
  color: var(--slate);
}

.page-about .chapter__body {
  max-width: 42em;
}

.page-about .chapter__body > h2 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .chapter__body > p {
  margin: 0 0 1.15em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(233, 245, 243, .84);
}

.page-about .chapter__body .media-frame {
  margin: clamp(26px, 4vw, 38px) 0;
}

/* ---------- 三类读者 ---------- */
.page-about .reader-list {
  list-style: none;
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding: 0;
}

.page-about .reader-item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  column-gap: clamp(14px, 2.5vw, 22px);
  padding: clamp(18px, 3vw, 24px) 0;
  border-top: 1px solid var(--line-faint);
}

.page-about .reader-item:last-child {
  border-bottom: 1px solid var(--line-faint);
}

.page-about .reader-item__key {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--heat);
}

.page-about .reader-item h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .reader-item p {
  grid-column: 2;
  margin: 7px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(233, 245, 243, .76);
}

/* ---------- 岗位切换 ---------- */
.page-about .filter-bar {
  margin: clamp(24px, 4vw, 34px) 0 clamp(14px, 2.5vw, 20px);
}

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

.page-about .role-card {
  padding: 18px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .role-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--neon);
}

.page-about .role-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(233, 245, 243, .78);
}

/* ---------- 四个环节 ---------- */
.page-about .steps {
  list-style: none;
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 0;
}

.page-about .step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  column-gap: clamp(12px, 2.5vw, 20px);
  padding: clamp(18px, 3vw, 24px) 0;
  border-top: 1px solid var(--line-faint);
}

.page-about .step:last-child {
  border-bottom: 1px solid var(--line-faint);
}

.page-about .step__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--indigo);
  filter: brightness(2.1);
}

.page-about .step h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .step p {
  grid-column: 2;
  margin: 7px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(233, 245, 243, .76);
}

/* ---------- 赛季时间线 ---------- */
.page-about .timeline {
  list-style: none;
  position: relative;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 26px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--indigo) 45%, rgba(59, 44, 110, 0) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 38px) clamp(28px, 5vw, 40px);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--neon);
  box-shadow: 0 0 0 4px rgba(37, 245, 194, .10);
}

.page-about .tl-item:last-child::before {
  background: var(--neon);
}

.page-about .tl-season {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .tl-item h3 {
  margin: 8px 0 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .tl-item p {
  margin: 8px 0 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(233, 245, 243, .76);
}

/* ---------- 支援与出口 ---------- */
.page-about .support-list {
  list-style: none;
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .support-list li {
  padding: clamp(16px, 3vw, 22px) 0;
  border-top: 1px solid var(--line-faint);
}

.page-about .support-list li:last-child {
  border-bottom: 1px solid var(--line-faint);
}

.page-about .support-list h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--neon);
}

.page-about .support-list p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(233, 245, 243, .78);
}

.page-about .support-list p:only-child,
.page-about .support-list h3 + p {
  max-width: 38em;
}

.page-about .next-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(28px, 4vw, 40px);
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
}

.page-about .next-link {
  display: block;
  padding: 18px 18px 20px;
  background: var(--night);
  border-top: 2px solid transparent;
  color: var(--mist);
  text-decoration: none;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-top-color: var(--neon);
  background: var(--cabin);
}

.page-about .next-link__label {
  display: block;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .next-link__desc {
  display: block;
  margin-top: 7px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 收尾山脊 ---------- */
.page-about .about-ridge {
  margin-top: -1px;
  border-top: 1px solid var(--line-faint);
  padding: clamp(18px, 3vw, 28px) 0 0;
  line-height: 0;
}

.page-about .about-ridge svg {
  display: block;
  width: 100%;
  height: clamp(60px, 9vw, 112px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .stat-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .chapter > .wrap {
    grid-template-columns: 128px minmax(0, 1fr);
    column-gap: clamp(28px, 4.5vw, 64px);
  }

  .page-about .chapter__aside {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .chapter__num {
    display: block;
    font-size: 14px;
  }

  .page-about .chapter__label {
    display: block;
    margin-top: 10px;
  }

  .page-about .reader-item {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .page-about .step {
    grid-template-columns: 52px minmax(0, 1fr);
  }

  .page-about .media-frame--square {
    max-width: 58%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-link {
    transition: none;
  }
}
</PAGE_CSS>>>