.page-about {
  --about-gap: 26px;
  --about-rule: rgba(244, 247, 255, 0.14);
  color: var(--white);
}

.page-about img {
  display: block;
  max-width: 100%;
}

.page-about .breadcrumb {
  padding: 18px 0 6px;
}

.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}

.page-about .media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .plate {
  display: inline-block;
}

.page-about .section-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 4.6vw, 42px);
  line-height: 1.14;
  letter-spacing: 0.005em;
  margin: 10px 0 14px;
  max-width: 22ch;
}

.page-about .section-note {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  padding: 24px 0 52px;
  overflow: hidden;
  background:
    radial-gradient(120% 95% at 10% 0%, rgba(123, 77, 255, 0.32), transparent 64%),
    radial-gradient(90% 70% at 94% 16%, rgba(46, 230, 214, 0.18), transparent 62%);
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(244, 247, 255, 0.05) 0 1px,
    transparent 1px 4px
  );
}

.page-about .about-cover-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-about .about-cover h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 9vw, 96px);
  line-height: 0.96;
  letter-spacing: -0.03em;
  margin: 14px 0 20px;
  text-shadow: 0 0 44px rgba(123, 77, 255, 0.5);
}

.page-about .about-cover-main .lead {
  max-width: 62ch;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.78;
  color: var(--white);
  margin: 0 0 16px;
}

.page-about .about-cover-text {
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 22px;
}

.page-about .about-cover-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

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

.page-about .about-side-figure .media-frame {
  border: 1px solid var(--line);
  box-shadow: 0 26px 60px -34px rgba(123, 77, 255, 0.9);
}

.page-about .about-side-figure .plate {
  margin-top: 12px;
}

/* ---------- 分栏骨架 ---------- */
.page-about .about-split {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-rail > .plate {
  margin-bottom: 8px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  background: var(--teal);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline-bg {
  position: absolute;
  inset: 0;
  opacity: 0.3;
}

.page-about .about-timeline-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-timeline-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 22px;
  position: relative;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 70%, transparent);
}

.page-about .about-stage {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 7px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 14px rgba(46, 230, 214, 0.8);
}

.page-about .about-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-stage h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(18px, 2.5vw, 24px);
  line-height: 1.3;
  margin: 0 0 8px;
}

.page-about .about-stage p {
  margin: 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .about-team-body > p {
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  margin: 0 0 20px;
}

.page-about .about-duties .expand-trigger,
.page-about .about-pacts .expand-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 14px 6px;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--line);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color 180ms ease, background-color 180ms ease;
}

.page-about .about-duties .expand-trigger:last-of-type,
.page-about .about-pacts .expand-trigger:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-about .about-duties .expand-trigger:hover,
.page-about .about-duties .expand-trigger:focus-visible,
.page-about .about-pacts .expand-trigger:hover,
.page-about .about-pacts .expand-trigger:focus-visible {
  color: var(--cyan);
  background: rgba(46, 230, 214, 0.06);
}

.page-about .about-duties .expand-panel,
.page-about .about-pacts .expand-panel {
  padding: 0 6px 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-about .about-duties .expand-panel p,
.page-about .about-pacts .expand-panel p {
  margin: 0;
  max-width: 58ch;
}

/* ---------- 规则体系 ---------- */
.page-about .about-rules {
  background: linear-gradient(180deg, rgba(21, 27, 61, 0.6), rgba(11, 16, 48, 0.2));
}

.page-about .about-rules-layout {
  display: grid;
  gap: var(--about-gap);
}

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

.page-about .about-rules-figure .media-frame {
  border: 1px solid var(--line);
}

.page-about .about-rules-figure .plate {
  margin-top: 12px;
}

.page-about .about-rules-text > p {
  max-width: 60ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  margin: 0;
}

.page-about .about-rules-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-rules-list li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.78;
}

.page-about .about-rules-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 12px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 合作 ---------- */
.page-about .about-partner {
  background: linear-gradient(160deg, rgba(58, 16, 40, 0.72), rgba(11, 16, 48, 0.1) 70%);
  border-top: 1px solid var(--line);
}

.page-about .about-partner-body > p {
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  margin: 0 0 18px;
}

.page-about .about-partner-note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
  max-width: 58ch;
}

/* ---------- 数字索引 ---------- */
.page-about .about-facts {
  padding: 44px 0 50px;
  background: linear-gradient(140deg, var(--wine) 0%, var(--ink-2) 52%, var(--teal) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.2;
  margin: 0 0 26px;
}

.page-about .about-fact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 18px;
}

.page-about .about-fact {
  border-top: 1px solid var(--about-rule);
  padding-top: 12px;
}

.page-about .about-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(22px, 4.6vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
  transition: color 180ms ease;
}

.page-about .about-fact:hover .about-fact-num {
  color: var(--cyan);
}

.page-about .about-fact-label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--white);
}

.page-about .about-fact-note {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: 46px 0 54px;
  background: var(--ink-deep);
}

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

.page-about .about-next-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(20px, 3.4vw, 30px);
  line-height: 1.25;
  margin: 8px 0 0;
  max-width: 26ch;
}

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

@media (min-width: 720px) {
  .page-about .about-fact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-cover {
    padding: 32px 0 64px;
  }

  .page-about .about-cover-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-rules-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: center;
  }

  .page-about .about-facts {
    padding: 56px 0 62px;
  }

  .page-about .about-fact-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-next {
    padding: 56px 0 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-fact-num,
  .page-about .about-duties .expand-trigger,
  .page-about .about-pacts .expand-trigger {
    transition: none;
  }
}
<<<END>>>