.page-about {
  --about-gap: clamp(22px, 3.2vw, 48px);
  --about-rule: 1px solid var(--line-600);
  --about-panel: rgba(18, 34, 59, 0.62);
  --about-panel-strong: rgba(18, 34, 59, 0.94);
  background:
    radial-gradient(140% 70% at 94% -14%, rgba(240, 178, 74, 0.16), transparent 58%),
    radial-gradient(110% 60% at -12% 28%, rgba(82, 224, 176, 0.07), transparent 62%),
    var(--ink-900);
  color: var(--text);
  padding-bottom: clamp(48px, 7vw, 110px);
  overflow-x: clip;
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 面包屑 */
.page-about .about-crumb {
  padding-top: clamp(16px, 2.4vw, 30px);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold);
  border-bottom-color: rgba(240, 178, 74, 0.5);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-soft);
}

/* 首屏 */
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  padding-block: clamp(26px, 4vw, 58px) clamp(32px, 4.5vw, 68px);
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(38px, 7.4vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__title strong {
  display: inline-block;
  font-weight: 700;
  background: linear-gradient(102deg, var(--gold), var(--glow) 58%, var(--ember));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--gold);
}

.page-about .about-hero__dek {
  margin: clamp(16px, 2vw, 24px) 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-stat {
  min-width: 0;
  padding-top: 14px;
}

.page-about .about-stat .data-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: var(--about-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: 0 18px 44px rgba(3, 7, 15, 0.55);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(202deg, rgba(240, 178, 74, 0.2), transparent 46%),
    linear-gradient(0deg, rgba(7, 11, 22, 0.68), transparent 56%);
}

/* 章节通用 */
.page-about .about-chapter {
  border-top: var(--about-rule);
  padding-block: clamp(38px, 5.4vw, 84px);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 44px);
}

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

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(62px, 10vw, 136px);
  font-weight: 200;
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(240, 178, 74, 0.72);
  opacity: 0.88;
}

.page-about .about-chapter__cue {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-chapter__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(23px, 3.1vw, 38px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-chapter__title em {
  font-style: normal;
  font-weight: 700;
  color: var(--gold);
}

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

/* 正文 */
.page-about .about-body p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.78;
  color: var(--text-soft);
}

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

.page-about .about-lede {
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.66;
  color: var(--text);
}

.page-about .about-mark {
  font-family: var(--font-mono);
  font-size: 0.94em;
  color: var(--gold);
  padding: 0 4px;
  border-bottom: 1px solid rgba(240, 178, 74, 0.45);
}

/* 双入口链接 */
.page-about .about-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-link {
  display: block;
  padding: 16px 18px;
  border: var(--about-rule);
  border-radius: var(--radius);
  background: var(--about-panel);
  text-decoration: none;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(240, 178, 74, 0.55);
  background: var(--about-panel-strong);
}

.page-about .about-link__label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-link__meta {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

/* 团队四组 */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__item {
  padding: 18px 18px 20px;
  border: var(--about-rule);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(18, 34, 59, 0.88), rgba(12, 21, 38, 0.72));
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  transform: translateY(-4px);
  border-color: rgba(240, 178, 74, 0.6);
  border-left-color: var(--gold);
}

.page-about .about-team__name {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--glow);
}

.page-about .about-team__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-soft);
}

/* 配图 */
.page-about .about-figure {
  position: relative;
  margin: clamp(26px, 3.4vw, 46px) 0 0;
  border: var(--about-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-about .about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(196deg, rgba(240, 178, 74, 0.16), transparent 52%),
    linear-gradient(0deg, rgba(7, 11, 22, 0.62), transparent 48%);
}

.page-about .about-figure figcaption {
  position: relative;
  z-index: 1;
  padding: 12px 16px 14px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--muted);
  border-top: var(--about-rule);
  background: rgba(12, 21, 38, 0.9);
}

/* 阶段时间线 */
.page-about .about-timeline {
  position: relative;
  margin: 24px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(240, 178, 74, 0.12));
}

.page-about .about-stage {
  position: relative;
  padding: 10px 0 18px;
}

.page-about .about-stage:last-child {
  padding-bottom: 4px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ink-900);
  transition: background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-stage:hover::before,
.page-about .about-stage:focus-within::before {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(240, 178, 74, 0.16);
}

.page-about .about-stage__no {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.page-about .about-stage__no .num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-stage__title {
  margin: 8px 0 6px;
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

.page-about .about-stage:hover .about-stage__title {
  color: var(--glow);
}

.page-about .about-stage__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
  opacity: 0.9;
  transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-stage:hover .about-stage__text,
.page-about .about-stage:focus-within .about-stage__text {
  opacity: 1;
  color: var(--text-soft);
}

/* 指标条 */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 10px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
}

.page-about .about-metric {
  min-width: 0;
  padding: 14px 14px 16px;
  border: var(--about-rule);
  border-radius: var(--radius);
  background: var(--about-panel);
}

.page-about .about-metric__v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--mint);
}

.page-about .about-metric__k {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--muted);
}

/* 四个对照维度 */
.page-about .about-dims {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-dims li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: var(--about-rule);
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-soft);
}

.page-about .about-dims__n {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 3px;
}

/* 协作生态 */
.page-about .about-eco {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__item {
  min-width: 0;
  padding: 18px;
  border: var(--about-rule);
  border-radius: var(--radius);
  background: linear-gradient(200deg, rgba(18, 34, 59, 0.86), rgba(7, 11, 22, 0.72));
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-eco__item:hover,
.page-about .about-eco__item:focus-within {
  transform: translateY(-6px);
  border-color: rgba(240, 178, 74, 0.55);
}

.page-about .about-eco__title {
  margin: 12px 0 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-eco__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* 联络 */
.page-about .about-contact {
  font-style: normal;
  margin: 24px 0 0;
  padding: 4px 18px 16px;
  border: var(--about-rule);
  border-radius: var(--radius);
  background: var(--about-panel);
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding: 14px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-contact__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--glow);
  overflow-wrap: anywhere;
}

.page-about .about-contact__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 620px) {
  .page-about .about-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-contact__row {
    grid-template-columns: 120px 1fr;
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 42fr 58fr;
    align-items: end;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 42fr 58fr;
    align-items: start;
  }

  .page-about .about-chapter__aside {
    position: sticky;
    top: 32px;
  }

  .page-about .about-figure {
    margin-left: calc(42% + clamp(18px, 3vw, 44px));
  }

  .page-about .about-chapter--contact .about-chapter__aside {
    position: static;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-link,
  .page-about .about-team__item,
  .page-about .about-eco__item,
  .page-about .about-stage::before,
  .page-about .about-stage__text {
    transition: none;
  }

  .page-about .about-link:hover,
  .page-about .about-link:focus-visible,
  .page-about .about-team__item:hover,
  .page-about .about-eco__item:hover,
  .page-about .about-eco__item:focus-within {
    transform: none;
  }
}
<<<END>>>
```