.page-about {
  --about-hair: rgba(185, 198, 232, 0.18);
  --about-hair-strong: rgba(183, 164, 255, 0.4);
  --about-panel: rgba(16, 31, 67, 0.92);
  background-color: var(--space);
  color: var(--moon);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 5vw, 46px) 0 clamp(30px, 5vw, 58px);
  background:
    radial-gradient(120% 100% at 86% -6%, rgba(42, 26, 94, 0.95) 0%, rgba(7, 19, 45, 0) 64%),
    radial-gradient(70% 55% at 4% 14%, rgba(53, 242, 214, 0.14) 0%, rgba(7, 19, 45, 0) 72%),
    var(--space);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(248, 244, 232, 0.28) 1px, transparent 1px),
    radial-gradient(rgba(183, 164, 255, 0.22) 1px, transparent 1px);
  background-size: 118px 118px, 176px 176px;
  background-position: 12px 26px, 64px 92px;
  opacity: 0.5;
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__lead h1 {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(1.95rem, 6.2vw, 4.2rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--moon);
  text-wrap: balance;
}

.page-about .about-hero__lead h1 .hl {
  color: var(--violet-soft);
  font-style: normal;
}

.page-about .about-hero__lede {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  max-width: 46ch;
  font-size: clamp(0.95rem, 1.5vw, 1.0625rem);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--ink);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--violet);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* 关键数字条 */
.page-about .fact-strip {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .fact-card {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 13px 14px;
  background: var(--night);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .fact-card__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .fact-card__label {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  padding-top: clamp(30px, 5vw, 62px);
  padding-bottom: clamp(44px, 7vw, 88px);
}

.page-about .about-index {
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--violet-soft);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 4px;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  color: var(--mist);
  text-decoration: none;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: var(--night);
  border-color: var(--about-hair-strong);
  color: var(--moon);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(34px, 5.5vw, 68px);
  padding-top: clamp(34px, 5.5vw, 68px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-sec__head {
  display: grid;
  gap: 8px;
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.012em;
  color: var(--moon);
  text-wrap: balance;
}

.page-about .about-sec__lede {
  margin: clamp(12px, 2vw, 18px) 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-sec__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--cyan);
  background: rgba(53, 242, 214, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-sec__note a {
  color: var(--cyan);
  text-underline-offset: 3px;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 22px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--violet-soft) 58%, rgba(183, 164, 255, 0) 100%);
  opacity: 0.75;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(22px, 3.4vw, 34px) 34px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--space);
  border: 3px solid var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 200, 87, 0.12);
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.6vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__body h3 {
  margin: 4px 0 6px;
  font-size: clamp(1rem, 1.8vw, 1.125rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--moon);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(22px, 3.6vw, 34px) 0 0;
  border: 2px solid var(--ink);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--night);
  box-shadow: var(--shadow-hard);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--about-hair);
  background: var(--about-panel);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--mist);
}

/* ---------- 数据体系 ---------- */
.page-about .data-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 30px);
  align-items: start;
}

.page-about .data-cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .data-card {
  padding: 16px 16px 18px;
  background: var(--night);
  border: 2px solid var(--ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hard-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .data-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-about .data-card__num,
.page-about .data-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .data-card__tag {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  padding-bottom: 2px;
}

.page-about .data-card h3 {
  margin: 8px 0 6px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--moon);
}

.page-about .data-card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--mist);
}

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

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 团队与节奏 ---------- */
.page-about .shift-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .shift {
  padding: 18px;
  border: 2px solid var(--about-hair-strong);
  border-radius: var(--radius-md);
  background: linear-gradient(158deg, rgba(42, 26, 94, 0.68) 0%, rgba(16, 31, 67, 0.95) 78%);
}

.page-about .shift__no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.8vw, 1.6rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--moon);
  font-variant-numeric: tabular-nums;
}

.page-about .shift h3 {
  margin: 8px 0 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--violet-soft);
}

.page-about .shift p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--mist);
  overflow-wrap: anywhere;
}

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .partner-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: var(--night);
  border: 2px solid var(--ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hard-sm);
  color: inherit;
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .partner-card:hover,
.page-about .partner-card:focus-visible {
  transform: translate(-2px, -3px);
  box-shadow: var(--shadow-hard);
  border-color: var(--cyan);
}

.page-about .partner-card .tag {
  align-self: flex-start;
  color: var(--violet-soft);
}

.page-about .partner-card h3 {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--moon);
}

.page-about .partner-card p {
  margin: 0;
  flex: 1 1 auto;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .partner-card__go {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 体验原则 ---------- */
.page-about .principle-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
}

.page-about .principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: clamp(14px, 2.4vw, 20px) 0;
  border-bottom: 1px dashed var(--about-hair-strong);
}

.page-about .principle:first-child {
  border-top: 1px dashed var(--about-hair-strong);
}

.page-about .principle__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--violet-soft);
  padding-top: 5px;
  font-variant-numeric: tabular-nums;
}

.page-about .principle h3 {
  margin: 0 0 5px;
  font-size: clamp(1rem, 2vw, 1.125rem);
  font-weight: 800;
  line-height: 1.45;
  color: var(--moon);
}

.page-about .principle p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 章节尾 CTA ---------- */
.page-about .about-cta {
  margin-top: clamp(26px, 4vw, 40px);
  padding: clamp(18px, 3vw, 26px);
  border: 2px solid var(--ink);
  border-radius: var(--radius-md);
  background: linear-gradient(140deg, rgba(42, 26, 94, 0.85) 0%, rgba(16, 31, 67, 0.96) 70%);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--moon);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-about .about-cta__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border: 1px solid var(--about-hair-strong);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  color: var(--moon);
  text-decoration: none;
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--space);
}

.page-about .about-backtop {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .fact-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .data-cards,
  .page-about .shift-list,
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 5vw, 68px);
  }

  .page-about .about-hero__figure {
    transform: rotate(-1.4deg);
  }

  .page-about .fact-strip {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

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

@media (min-width: 980px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 212px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    margin-bottom: 0;
    padding-right: 6px;
  }

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

  .page-about .about-index__link {
    border-color: transparent;
    border-radius: var(--radius-sm);
  }

  .page-about .data-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-figure--square {
    margin-top: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .data-card,
  .page-about .partner-card,
  .page-about .about-cta__link,
  .page-about .about-index__link {
    transition: none;
  }

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

  .page-about .about-hero__figure {
    transform: none;
  }
}
<<<END>>>