.page-about {
  --toc-w: 176px;
  --about-gap: 48px;
  color: var(--ink);
  background: var(--paper);
}

.page-about .about-crumb {
  width: min(100% - 40px, var(--wrap));
  margin: 0 auto;
  padding: 26px 0 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-crumb a {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid var(--jade-soft);
  padding-bottom: 2px;
}

.page-about .about-crumb a:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar-soft);
}

.page-about .about-crumb__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  width: min(100% - 40px, var(--wrap));
  margin: 28px auto 0;
  display: grid;
  gap: 30px;
}

.page-about .about-hero__text h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 72px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 18px 0 0;
  max-width: 12em;
}

.page-about .about-hero__lead {
  margin: 26px 0 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 30px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
}

.page-about .about-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__meta .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 600;
  color: var(--cinnabar);
  line-height: 1;
}

.page-about .about-hero__key {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(63, 111, 106, 0.18), rgba(217, 168, 92, 0.22));
}

.page-about .figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .figure__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-hero__figure .figure__img {
  aspect-ratio: 3 / 4;
}

.page-about .figure__cap {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  padding: 10px 14px;
  background: var(--sand);
}

.page-about .about-hero__note {
  display: none;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--jade);
  writing-mode: vertical-rl;
  margin: 0;
}

/* ---------- 主布局 ---------- */
.page-about .about-layout {
  width: min(100% - 40px, var(--wrap));
  margin: 56px auto 0;
  display: grid;
  gap: 34px;
}

.page-about .about-toc__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--jade);
  margin: 0 0 12px;
}

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

.page-about .about-toc__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--sand);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  border-color: var(--cinnabar-soft);
  color: var(--cinnabar);
  background: var(--paper);
}

.page-about .about-toc__list .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cinnabar);
}

.page-about .about-flow {
  display: grid;
  gap: 72px;
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  min-width: 0;
}

.page-about .about-sec--narrow {
  max-width: 34em;
}

.page-about .about-sec h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
}

.page-about .prose p {
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-sec__head {
  max-width: 40em;
}

.page-about .about-sec__lead {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--jade);
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  display: block;
}

.page-about .eyebrow--light {
  color: var(--jade-soft);
}

/* ---------- 分类四组 ---------- */
.page-about .cat-grid {
  margin-top: 34px;
  display: grid;
  gap: 16px;
}

.page-about .cat-card {
  position: relative;
  padding: 26px 24px 24px;
  border-radius: var(--radius-md);
  background: var(--sand);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cinnabar);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .cat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px var(--ink-08);
}

.page-about .cat-card__range {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
  margin: 0;
}

.page-about .cat-card h3 {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
}

.page-about .cat-card p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .cat-card__use {
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: var(--jade) !important;
  font-size: 14px !important;
}

/* ---------- 版本时间带 ---------- */
.page-about .ver-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 34px 22px 30px;
  background: linear-gradient(150deg, var(--deep), #172e2c 62%, #2c2622);
  color: var(--paper);
}

.page-about .ver-band__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  pointer-events: none;
}

.page-about .ver-band__head,
.page-about .ver {
  position: relative;
}

.page-about .ver-band h2 {
  color: var(--paper);
  margin-top: 14px;
}

.page-about .ver-band__hint {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-62);
}

.page-about .ver {
  margin-top: 28px;
  display: grid;
  gap: 12px;
}

.page-about .ver__item {
  border-radius: var(--radius-md);
  background: rgba(251, 247, 240, 0.06);
  border: 1px solid var(--paper-22);
  overflow: hidden;
}

.page-about .ver__item[open] {
  background: rgba(251, 247, 240, 0.1);
  border-color: rgba(217, 168, 92, 0.55);
}

.page-about .ver__sum {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .ver__sum::-webkit-details-marker {
  display: none;
}

.page-about .ver__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
}

.page-about .ver__title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--paper);
}

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

.page-about .ver__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--paper-62);
}

/* ---------- 团队 ---------- */
.page-about .team {
  display: grid;
  gap: 26px;
}

.page-about .team__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .team__figure .figure__img {
  aspect-ratio: 5 / 4;
}

.page-about .team__text h2 {
  margin-top: 14px;
}

.page-about .review {
  margin-top: 28px;
}

.page-about .review__layer {
  border-radius: var(--radius-md);
  padding: 14px;
}

.page-about .review__layer--1 {
  background: rgba(178, 58, 47, 0.1);
  border: 1px solid var(--cinnabar-soft);
}

.page-about .review__layer--2 {
  background: rgba(63, 111, 106, 0.1);
  border: 1px solid var(--jade-soft);
}

.page-about .review__layer--3 {
  background: var(--deep);
  border: 1px solid var(--deep);
  padding: 16px 14px;
  text-align: center;
}

.page-about .review__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 10px;
}

.page-about .review__layer--3 .review__tag {
  color: var(--gold);
  margin-bottom: 0;
}

/* ---------- 数据条 ---------- */
.page-about .about-strip {
  border-radius: var(--radius-lg);
  background: var(--deep);
  color: var(--paper);
  padding: 32px 22px 30px;
}

.page-about .about-strip h2 {
  color: var(--paper);
  margin-top: 14px;
}

.page-about .about-strip__grid {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .about-strip__grid li {
  border-top: 1px solid var(--paper-22);
  padding-top: 14px;
}

.page-about .about-strip__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 5.6vw, 34px);
  font-weight: 600;
  color: var(--gold);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-about .about-strip__key {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper-62);
}

.page-about .about-strip__notes {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--paper-22);
  display: grid;
  gap: 14px;
}

.page-about .about-strip__notes p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper-62);
}

/* ---------- 收尾 ---------- */
.page-about .about-next__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 4vw, 30px);
  letter-spacing: -0.02em;
  margin: 0;
}

.page-about .about-next__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-next__list li {
  border-bottom: 1px solid var(--line);
}

.page-about .about-next__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 4px;
  color: var(--ink);
  text-decoration: none;
  font-size: 16px;
  line-height: 1.6;
  transition: color 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  color: var(--cinnabar);
  padding-left: 10px;
}

.page-about .about-next__list .mono {
  font-family: var(--font-mono);
  color: var(--cinnabar);
}

.page-about .about-next__btn {
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-strip__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-strip {
    padding: 40px 34px 36px;
  }

  .page-about .ver-band {
    padding: 42px 34px 38px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: end;
    gap: 48px;
    margin-top: 40px;
  }

  .page-about .about-hero__note {
    display: block;
    position: absolute;
    left: -34px;
    top: 8px;
  }

  .page-about .team {
    grid-template-columns: 380px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--toc-w) minmax(0, 1fr);
    gap: var(--about-gap);
    margin-top: 72px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 104px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    overflow: visible;
    gap: 4px;
    padding-bottom: 0;
  }

  .page-about .about-toc__list a {
    border: 0;
    background: transparent;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 9px 0 9px 14px;
    font-size: 14px;
    width: 100%;
  }

  .page-about .about-toc__list a:hover,
  .page-about .about-toc__list a:focus-visible {
    border-left-color: var(--cinnabar);
    color: var(--cinnabar);
  }

  .page-about .about-flow {
    gap: 104px;
  }

  .page-about .ver {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    align-items: start;
  }

  .page-about .ver__sum {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .cat-card,
  .page-about .about-toc__list a,
  .page-about .about-next__list a {
    transition: none;
  }

  .page-about .cat-card:hover {
    transform: none;
  }
}
<<<END>>>