.page-about {
  background: var(--sand);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(18px, 3vw, 34px) clamp(34px, 5.5vw, 68px);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: clamp(14px, 2vw, 22px);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--graphite);
}
.page-about .breadcrumb a {
  color: var(--peacock-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, color .2s ease;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--peacock);
  border-bottom-color: var(--amber);
}
.page-about .breadcrumb__sep {
  margin-inline: 8px;
  opacity: .5;
}

.page-about .about-hero__frame {
  position: relative;
  background: var(--shell);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.4vw, 44px) clamp(16px, 3vw, 40px) clamp(22px, 3vw, 36px);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--rule-strong) 0 1px, transparent 1px 13px);
  opacity: .55;
  pointer-events: none;
}
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--amber) 0%, var(--garnet) 55%, var(--amethyst) 100%);
  opacity: .85;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
}

.page-about .eyebrow {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-about h1 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.85rem, 6.2vw, 3.35rem);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--peacock);
  text-wrap: balance;
}

.page-about .lead {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--graphite);
  max-width: 46em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--sand);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: clamp(18px, 2.6vw, 26px) 0 0;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.4vw, 28px);
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.page-about .about-stat__value {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1;
  color: var(--peacock);
  font-variant-numeric: tabular-nums;
}
.page-about .about-stat__value small {
  font-family: var(--sans);
  font-size: .46em;
  font-weight: 600;
  color: var(--graphite);
  margin-left: 2px;
}
.page-about .about-stat__label {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--graphite);
}

/* ---------- 主体：左侧索引 + 右侧叙事 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  padding-block: clamp(6px, 2vw, 18px) clamp(50px, 7vw, 100px);
}

.page-about .about-index {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, .72);
  padding: 14px 12px;
}
.page-about .about-index__label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--graphite);
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 4px;
  border-left: 2px solid transparent;
  color: var(--peacock-mid);
  font-size: 14px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: rgba(216, 155, 43, .14);
  border-left-color: var(--amber);
  color: var(--peacock);
}
.page-about .about-index__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--amber);
  flex: none;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-block: clamp(26px, 4vw, 42px);
  border-top: 1px solid var(--rule);
  scroll-margin-top: 88px;
}
.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(14px, 2.2vw, 22px);
}
.page-about .about-section__head .chapter-num {
  flex: none;
  color: var(--amber);
  opacity: .9;
}
.page-about .about-section__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.25rem, 3.4vw, 2rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--peacock);
  text-wrap: balance;
}
.page-about .about-section:target .about-section__title {
  color: var(--peacock-mid);
}

.page-about .about-section .prose p {
  margin: 0 0 1em;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.88;
  color: var(--graphite);
}
.page-about .about-section .prose p:last-child {
  margin-bottom: 0;
}
.page-about .about-section .prose strong {
  color: var(--ink);
  font-weight: 600;
}
.page-about .about-prose--after {
  margin-top: clamp(16px, 2.4vw, 24px);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber) 0%, var(--rule-strong) 60%, var(--rule) 100%);
  pointer-events: none;
}
.page-about .about-timeline__item {
  position: relative;
  padding-left: 32px;
  padding-bottom: clamp(18px, 2.8vw, 26px);
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 9px;
  height: 9px;
  box-sizing: content-box;
  border-radius: 50%;
  background: var(--shell);
  border: 2px solid var(--amber);
}
.page-about .about-timeline__stage {
  display: block;
  margin-bottom: 5px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--garnet);
}
.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.3vw, 1.22rem);
  line-height: 1.45;
  color: var(--ink);
}
.page-about .about-timeline__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--graphite);
}

/* ---------- 步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(18px, 2.8vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(9px, 1.5vw, 13px);
}
.page-about .about-step {
  position: relative;
  background: var(--shell);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 15px 16px 15px 50px;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.page-about .about-step:hover {
  border-color: rgba(216, 155, 43, .55);
  box-shadow: var(--shadow-sm);
}
.page-about .about-step__num {
  position: absolute;
  left: 15px;
  top: 16px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--amber);
}
.page-about .about-step__title {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1rem;
  color: var(--peacock);
}
.page-about .about-step__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--graphite);
}

/* ---------- 章节配图 ---------- */
.page-about .about-section__media {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--shell);
}
.page-about .about-section__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media__caption {
  display: block;
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--graphite);
  border-top: 1px solid var(--rule);
  background: rgba(246, 241, 232, .6);
}

/* ---------- 数字卡 ---------- */
.page-about .about-figures {
  list-style: none;
  margin: clamp(18px, 2.8vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(9px, 1.5vw, 14px);
}
.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: clamp(14px, 2vw, 20px);
  background: var(--shell);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.page-about .about-figure:nth-child(1) { border-top: 3px solid var(--peacock-mid); }
.page-about .about-figure:nth-child(2) { border-top: 3px solid var(--amethyst); }
.page-about .about-figure:nth-child(3) { border-top: 3px solid var(--amber); }
.page-about .about-figure:nth-child(4) { border-top: 3px solid var(--olive); }
.page-about .about-figure__value {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.2vw, 2.15rem);
  line-height: 1.05;
  color: var(--peacock);
  font-variant-numeric: tabular-nums;
}
.page-about .about-figure__value small {
  font-family: var(--sans);
  font-size: .44em;
  font-weight: 600;
  color: var(--graphite);
  margin-left: 2px;
}
.page-about .about-figure__label {
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--graphite);
}

/* ---------- 品类色块 ---------- */
.page-about .about-families {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-family {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px 7px 11px;
  border-radius: 999px;
  background: var(--shell);
  border: 1px solid var(--rule);
  font-size: 14px;
  color: var(--ink);
  transition: background .2s ease, border-color .2s ease;
}
.page-about .about-family:hover {
  background: var(--sand);
  border-color: var(--rule-strong);
}
.page-about .about-family::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--fam, var(--amber));
  transform: rotate(45deg);
  flex: none;
}
.page-about .about-family:nth-child(6n+1) { --fam: var(--peacock-mid); }
.page-about .about-family:nth-child(6n+2) { --fam: var(--garnet); }
.page-about .about-family:nth-child(6n+3) { --fam: var(--olive); }
.page-about .about-family:nth-child(6n+4) { --fam: var(--amethyst); }
.page-about .about-family:nth-child(6n+5) { --fam: var(--peacock); }
.page-about .about-family:nth-child(6n+6) { --fam: var(--amber); }

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: clamp(18px, 2.8vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(9px, 1.5vw, 14px);
}
.page-about .about-partner {
  padding: clamp(14px, 2vw, 18px);
  background: var(--shell);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  min-width: 0;
}
.page-about .about-partner:hover,
.page-about .about-partner:focus-within {
  transform: translateY(-3px);
  border-color: rgba(216, 155, 43, .6);
  box-shadow: var(--shadow-sm);
  outline: none;
}
.page-about .about-partner:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}
.page-about .about-partner__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--peacock);
}
.page-about .about-partner__more {
  display: block;
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  list-style: none;
  margin: clamp(18px, 2.8vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(10px, 1.6vw, 16px);
}
.page-about .about-audience__item {
  padding: clamp(15px, 2.2vw, 20px) clamp(15px, 2.2vw, 20px);
  background: var(--shell);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  min-width: 0;
}
.page-about .about-audience__item:nth-child(4n+1) { border-left-color: var(--peacock-mid); }
.page-about .about-audience__item:nth-child(4n+2) { border-left-color: var(--garnet); }
.page-about .about-audience__item:nth-child(4n+3) { border-left-color: var(--amethyst); }
.page-about .about-audience__item:nth-child(4n+4) { border-left-color: var(--olive); }
.page-about .about-audience__title {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--peacock);
}
.page-about .about-audience__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-section--next {
  border-top: 1px solid var(--rule-strong);
}
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(10px, 1.6vw, 14px);
  margin-top: clamp(18px, 2.8vw, 26px);
}
.page-about .about-cta__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.8vw, 28px);
  border-radius: var(--radius-lg);
  background: var(--peacock);
  border: 1px solid var(--peacock-deep);
  color: var(--shell);
  text-decoration: none;
  transition: transform .25s ease, background .25s ease;
}
.page-about .about-cta__card:hover,
.page-about .about-cta__card:focus-visible {
  transform: translateY(-3px);
  background: var(--peacock-mid);
}
.page-about .about-cta__card--amber {
  background: var(--amber);
  border-color: #c3881f;
  color: var(--peacock-deep);
}
.page-about .about-cta__card--amber:hover,
.page-about .about-cta__card--amber:focus-visible {
  background: var(--amber-soft);
}
.page-about .about-cta__kicker {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  opacity: .85;
}
.page-about .about-cta__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  line-height: 1.4;
}
.page-about .about-cta__arrow {
  margin-top: 6px;
  font-size: 13.5px;
  letter-spacing: .04em;
  opacity: .9;
}
.page-about .about-more-links {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--graphite);
}
.page-about .about-more-links a {
  color: var(--peacock-mid);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 155, 43, .6);
  padding-bottom: 1px;
  transition: color .2s ease, border-color .2s ease;
}
.page-about .about-more-links a:hover,
.page-about .about-more-links a:focus-visible {
  color: var(--peacock);
  border-bottom-color: var(--peacock);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-audience {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partners {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-cta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    column-gap: clamp(34px, 5vw, 72px);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 88px;
    padding: 18px 14px;
  }
  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
  }
  .page-about .about-index__link {
    white-space: normal;
    padding: 9px 10px;
    font-size: 14.5px;
  }
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .about-partner__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height .3s ease, opacity .3s ease, margin-top .3s ease;
  }
  .page-about .about-partner:hover .about-partner__more,
  .page-about .about-partner:focus-within .about-partner__more {
    max-height: 7em;
    opacity: 1;
    margin-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner,
  .page-about .about-cta__card,
  .page-about .about-step,
  .page-about .about-index__link {
    transition: none;
  }
  .page-about .about-partner:hover,
  .page-about .about-partner:focus-within,
  .page-about .about-cta__card:hover,
  .page-about .about-cta__card:focus-visible {
    transform: none;
  }
}
<<<END>>>