.page-about {
  --about-rail-w: 224px;
  --about-gray: rgba(154, 166, 184, 0.3);
  background: var(--paper);
  color: var(--text-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background:
    radial-gradient(120% 96% at 86% -10%, rgba(66, 57, 122, 0.65) 0%, rgba(11, 26, 46, 0) 62%),
    var(--ink-navy);
  color: var(--paper);
  border-bottom: 3px solid var(--gold);
  padding: clamp(28px, 4vw, 48px) 0 clamp(40px, 6vw, 76px);
}

.page-about .about-hero .breadcrumb {
  color: var(--mist);
  font-size: 13px;
  margin-bottom: clamp(24px, 3.5vw, 44px);
}
.page-about .about-hero .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 7.2vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin-top: clamp(16px, 2.2vw, 26px);
  max-width: 34em;
  color: var(--paper-90);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

.page-about .about-hero__aside {
  border: var(--bw) solid var(--gold-soft);
  background: var(--ink-navy-2);
  padding: 18px 18px 8px;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.35);
}

.page-about .about-hero__aside-title {
  margin: 0 0 12px;
  color: var(--gold);
}

.page-about .about-hero__quick {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.page-about .about-hero__quick a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 2px;
  color: var(--paper);
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  transition: color 180ms var(--ease), padding-left 180ms var(--ease);
}
.page-about .about-hero__quick a span {
  font-weight: 400;
  font-size: 12.5px;
  color: var(--mist);
  letter-spacing: 0.02em;
}
.page-about .about-hero__quick a:hover,
.page-about .about-hero__quick a:focus-visible {
  color: var(--gold);
  padding-left: 8px;
}

/* ---------- 路径条 ---------- */
.page-about .path-strip--about {
  margin-top: clamp(32px, 5vw, 56px);
  border-top: 2px solid var(--gold-soft);
  border-bottom: 2px solid var(--gold-soft);
  padding: clamp(16px, 2.4vw, 24px) 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-about .path-strip--about .path-strip__step {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 14px;
  align-items: center;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
}
.page-about .path-strip--about .path-strip__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
}
.page-about .path-strip--about .path-strip__label {
  font-weight: 700;
  font-size: 15px;
  color: var(--paper);
}
.page-about .path-strip--about .path-strip__hint {
  font-size: 12.5px;
  color: var(--mist);
}

/* ---------- 主体框架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 88px);
}

.page-about .about-rail {
  border-top: var(--bw) solid var(--text-ink);
  padding-top: 12px;
}

.page-about .about-rail__cap {
  margin: 0 0 12px;
  color: var(--ink-navy-2);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--text-ink);
  background: var(--paper);
  color: var(--text-ink);
  text-decoration: none;
  white-space: nowrap;
  font-size: 13.5px;
  transition: background-color 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: var(--gold);
  color: var(--ink-navy);
  transform: translate(-2px, -2px);
}
.page-about .about-rail__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral);
  font-weight: 700;
}
.page-about .about-rail__link:hover .about-rail__idx,
.page-about .about-rail__link:focus-visible .about-rail__idx {
  color: var(--ink-navy);
}

/* ---------- 正文章节 ---------- */
.page-about .about-body {
  counter-reset: chap;
  min-width: 0;
}

.page-about .about-chapter {
  counter-increment: chap;
  padding-block: clamp(22px, 3.4vw, 40px);
}
.page-about .about-chapter + .about-chapter,
.page-about .about-chapter + .about-figures,
.page-about .about-figures + .about-chapter {
  border-top: 1px solid var(--about-gray);
}

.page-about .about-chapter__kicker {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 10px;
  color: var(--coral);
}
.page-about .about-chapter__kicker::before {
  content: counter(chap, decimal-leading-zero);
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--ink-navy);
  text-shadow: 3px 3px 0 var(--gold);
}

.page-about .about-chapter__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.28;
  font-weight: 600;
  color: var(--ink-navy);
  max-width: 22em;
}

.page-about .about-chapter .prose {
  max-width: 34em;
  font-size: 16px;
  line-height: 1.9;
}
.page-about .about-chapter .prose p {
  margin: 0 0 1.2em;
}
.page-about .about-chapter .prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 插图 ---------- */
.page-about .about-figure {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  border: var(--bw) solid var(--text-ink);
  background: var(--ink-navy);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}
.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.92;
}
.page-about .about-figure--wide .about-figure__img {
  aspect-ratio: 2 / 1;
}
.page-about .about-figure__cap {
  padding: 10px 14px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--gold-light);
  background: var(--ink-navy);
  border-top: 2px solid var(--gold);
}

/* ---------- 数据条 ---------- */
.page-about .about-figures {
  background: var(--ink-navy);
  color: var(--paper);
  border-top: 3px solid var(--gold);
  border-bottom: 3px solid var(--gold);
  padding: clamp(24px, 3.6vw, 40px) clamp(18px, 3vw, 32px);
  margin: clamp(26px, 4vw, 44px) 0;
}
.page-about .about-figures--alt {
  background: var(--indigo);
  border-top-color: var(--celadon);
  border-bottom-color: var(--celadon);
}

.page-about .about-figures__cap {
  margin: 0 0 clamp(14px, 2vw, 20px);
  color: var(--gold);
}
.page-about .about-figures--alt .about-figures__cap {
  color: var(--paper-70);
}

.page-about .about-figures__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.page-about .about-figures__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
}
.page-about .about-figures--alt .about-figures__item {
  border-left-color: var(--gold-light);
}

.page-about .about-figures__value {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.page-about .about-figures__value em {
  font-style: normal;
  font-size: 0.44em;
  margin-left: 3px;
  color: var(--gold-light);
  letter-spacing: 0;
}
.page-about .about-figures--alt .about-figures__value {
  color: var(--paper);
}
.page-about .about-figures--alt .about-figures__value em {
  color: var(--gold-light);
}

.page-about .about-figures__label {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 合作节点 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  position: relative;
}

.page-about .about-partners__node {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  border: var(--bw) solid var(--text-ink);
  background: var(--paper);
  box-shadow: var(--shadow-hard);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .about-partners__node--coral {
  border-left: 8px solid var(--coral);
}
.page-about .about-partners__node--celadon {
  border-left: 8px solid var(--celadon);
}
.page-about .about-partners__node:hover,
.page-about .about-partners__node:focus-within {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--ink-shadow);
  border-color: var(--gold);
}

.page-about .about-partners__n {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 800;
  line-height: 1;
  color: var(--ink-navy);
}
.page-about .about-partners__t {
  font-weight: 700;
  font-size: 16px;
  color: var(--ink-navy);
}
.page-about .about-partners__h {
  font-size: 13px;
  color: #57607a;
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 底部通栏 ---------- */
.page-about .about-banner {
  position: relative;
  background: var(--ink-navy);
  border-top: 3px solid var(--gold);
  overflow: hidden;
}
.page-about .about-banner__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.4;
  filter: blur(2px);
}
.page-about .about-banner__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(48px, 8vw, 104px);
}
.page-about .about-banner__line {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.01em;
}
.page-about .about-banner__sub {
  margin: 12px 0 clamp(20px, 3vw, 30px);
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-90);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-figures__item {
    padding: 0 20px;
    border-left: 2px solid var(--gold);
  }
  .page-about .about-figures--alt .about-figures__item {
    border-left-color: var(--gold-light);
  }

  .page-about .path-strip--about {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .path-strip--about .path-strip__step + .path-strip__step {
    border-left: 1px solid var(--line-soft);
    padding-left: 22px;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px;
  }
  .page-about .about-partners::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 44px;
    height: 3px;
    background: var(--gold);
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 7px var(--paper);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 80px);
  }

  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 88px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    padding-bottom: 8px;
  }
  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }
  .page-about .about-rail__link {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 3px solid var(--about-gray);
    padding: 9px 0 9px 12px;
    white-space: normal;
    background: transparent;
  }
  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: transparent;
    border-left-color: var(--gold);
    color: var(--ink-navy);
    transform: none;
  }
  .page-about .about-rail__name {
    font-size: 14.5px;
  }

  .page-about .about-chapter {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .about-chapter .about-figure {
    max-width: 78%;
  }
  .page-about .about-chapter .about-figure--wide {
    max-width: 100%;
  }
}

@media (min-width: 1180px) {
  .page-about .about-chapter .about-figure {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-partners__node,
  .page-about .about-hero__quick a {
    transition: none;
  }
  .page-about .about-partners__node:hover,
  .page-about .about-partners__node:focus-within {
    transform: none;
  }
}
</final>