.page-about {
  --about-rail-w: 156px;
  --about-line: rgba(224, 170, 78, 0.22);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: 4rem;
}

.page-about .about-hero {
  padding: calc(var(--header-h) + 2.5rem) 0 3rem;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(59, 26, 77, 0.92) 0%, rgba(20, 16, 26, 0) 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-soft) 100%);
  border-bottom: 1px solid var(--gold-line);
}

.page-about .breadcrumbs {
  margin-bottom: 2rem;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 2.25rem;
  align-items: end;
}

.page-about .about-hero__title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: var(--fs-40);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
  margin: 0.75rem 0 1.25rem;
  max-width: 20ch;
}

.page-about .about-hero__lead {
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 1rem;
  max-width: var(--measure);
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.25rem;
  margin: 1.75rem 0 2rem;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--gold-line);
}

.page-about .about-fact {
  min-width: 5.5rem;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  letter-spacing: 0.04em;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 0.35rem;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-hero__media {
  border-color: var(--gold-line);
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  padding: 3rem 0 3.5rem;
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-rail {
  position: relative;
}

.page-about .about-rail__note {
  display: none;
}

.page-about .about-rail__title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: var(--fs-24);
  line-height: 1.25;
  color: var(--paper);
  margin: 0 0 1rem;
}

.page-about .about-rail__title span {
  display: block;
  font-size: var(--fs-14);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-top: 0.35rem;
  font-family: var(--font-mono);
}

.page-about .about-rail__years {
  list-style: none;
  margin: 0;
  padding: 0 0 0.5rem;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__item {
  position: relative;
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--gold-line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--muted);
  background: rgba(59, 26, 77, 0.4);
  transition: color 0.2s var(--bezier), background 0.2s var(--bezier), border-color 0.2s var(--bezier);
}

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.05em;
  color: var(--gold);
}

.page-about .about-rail__tag {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--gold);
  background: var(--wine);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

/* ===== 站点卡 ===== */
.page-about .about-stops {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.page-about .about-stop {
  display: grid;
  grid-template-columns: 3.6rem 1fr;
  gap: 0.9rem;
  align-items: start;
  padding: 1.25rem 1.15rem;
  background: linear-gradient(180deg, rgba(59, 26, 77, 0.5) 0%, rgba(28, 22, 34, 0.92) 100%);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--gold-line);
  border-radius: var(--radius);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
  transition: border-color 0.25s var(--bezier), background 0.25s var(--bezier), transform 0.25s var(--bezier);
}

.page-about .about-stop:hover,
.page-about .about-stop:target {
  border-color: var(--gold);
  border-left-color: var(--gold);
  background: linear-gradient(180deg, rgba(59, 26, 77, 0.78) 0%, rgba(28, 22, 34, 0.96) 100%);
  transform: translateX(3px);
}

.page-about .about-stop__year {
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  letter-spacing: 0.04em;
  color: var(--gold);
  line-height: 1.2;
  padding-top: 0.1rem;
}

.page-about .about-stop__title {
  font-family: var(--font-heading);
  font-size: var(--fs-18);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
  margin: 0 0 0.45rem;
}

.page-about .about-stop__text {
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--muted);
  margin: 0;
  max-width: 58ch;
}

/* ===== 通用标题与正文 ===== */
.page-about .about-h2 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: var(--fs-24);
  line-height: 1.25;
  color: var(--paper);
  margin: 0.6rem 0 1rem;
}

.page-about .about-body {
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 1rem;
  max-width: var(--measure);
}

/* ===== 团队 ===== */
.page-about .about-team {
  padding: 3rem 0 3.5rem;
  background: linear-gradient(180deg, rgba(59, 26, 77, 0.95) 0%, rgba(43, 19, 56, 0.95) 100%);
  border-top: 1px solid var(--gold-line);
  border-bottom: 1px solid var(--gold-line);
}

.page-about .about-team__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-team__media {
  border-color: var(--gold-line);
  margin: 0 0 1.5rem;
}

.page-about .about-bar {
  display: flex;
  gap: 3px;
  height: 1.6rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(245, 237, 220, 0.22);
  background: rgba(20, 16, 26, 0.6);
}

.page-about .about-bar__seg {
  display: block;
  height: 100%;
  transition: filter 0.2s var(--bezier);
}

.page-about .about-bar__seg--serve {
  flex: 68 1 0;
  background: var(--gold);
}

.page-about .about-bar__seg--review {
  flex: 14 1 0;
  background: var(--mint);
}

.page-about .about-bar__seg--tech {
  flex: 38 1 0;
  background: var(--wine-lit);
}

.page-about .about-bar__seg:hover {
  filter: brightness(1.15);
}

.page-about .about-bar__legend {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-bar__legend-item {
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--muted);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.page-about .about-bar__legend-item .mono {
  color: var(--paper);
  font-size: var(--fs-14);
}

.page-about .about-bar__swatch {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  transform: translateY(-1px);
}

.page-about .about-bar__swatch--serve { background: var(--gold); }
.page-about .about-bar__swatch--review { background: var(--mint); }
.page-about .about-bar__swatch--tech { background: var(--wine-lit); }

/* ===== 安全与透明度 ===== */
.page-about .about-trust {
  padding: 3rem 0 3.5rem;
}

.page-about .about-trust__head {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.page-about .about-trust__grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: 1fr;
}

.page-about .about-trust__card {
  padding: 1.35rem 1.2rem;
  background: var(--ink-soft);
  border: 1px solid var(--about-line);
  border-top: 2px solid var(--gold);
  border-radius: var(--radius);
  transition: background 0.25s var(--bezier), border-color 0.25s var(--bezier);
}

.page-about .about-trust__card:hover {
  background: rgba(59, 26, 77, 0.55);
  border-color: var(--gold);
}

.page-about .about-trust__num {
  font-family: var(--font-mono);
  font-size: var(--fs-32);
  letter-spacing: 0.03em;
  color: var(--gold);
  line-height: 1.1;
  margin: 0 0 0.35rem;
}

.page-about .about-trust__label {
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--paper);
  margin: 0 0 0.5rem;
}

.page-about .about-trust__text {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

/* ===== 合作与覆盖 ===== */
.page-about .about-eco {
  padding: 1rem 0 3.5rem;
}

.page-about .about-eco__panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--gold-line);
  border-radius: var(--radius);
  background: var(--ink);
}

.page-about .about-eco__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.32;
  filter: saturate(0.85);
  display: block;
}

.page-about .about-eco__inner {
  position: relative;
  padding: 2rem 1.25rem;
  background: linear-gradient(180deg, rgba(20, 16, 26, 0.6) 0%, rgba(20, 16, 26, 0.94) 78%);
}

.page-about .about-eco__stats {
  list-style: none;
  margin: 1.5rem 0 1.25rem;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--gold-line);
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.5rem;
}

.page-about .about-eco__stat {
  min-width: 6rem;
}

.page-about .about-eco__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-32);
  letter-spacing: 0.03em;
  color: var(--paper);
  line-height: 1.1;
}

.page-about .about-eco__cap {
  display: block;
  margin-top: 0.3rem;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-eco__note {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  max-width: var(--measure);
}

/* ===== 主张 ===== */
.page-about .about-creed {
  padding: 3rem 0 0;
  border-top: 1px solid var(--gold-line);
}

.page-about .about-creed__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-creed__intro .btn {
  margin-top: 0.5rem;
}

.page-about .about-creed__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-creed__step {
  position: relative;
  padding: 1.35rem 1.2rem 1.35rem 3.4rem;
  background: linear-gradient(135deg, rgba(124, 35, 56, 0.42) 0%, rgba(28, 22, 34, 0.9) 100%);
  border: 1px solid rgba(224, 170, 78, 0.2);
  border-radius: var(--radius);
}

.page-about .about-creed__idx {
  position: absolute;
  left: 1.1rem;
  top: 1.3rem;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-creed__step-title {
  font-family: var(--font-heading);
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 0.45rem;
  line-height: 1.35;
}

.page-about .about-creed__step p {
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 0.75rem;
}

.page-about .about-creed__link {
  display: inline-block;
  font-size: var(--fs-14);
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 227, 196, 0.4);
  padding-bottom: 1px;
  transition: color 0.2s var(--bezier), border-color 0.2s var(--bezier);
}

.page-about .about-creed__link:hover,
.page-about .about-creed__link:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .about-creed__link:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-about .about-hero__title {
    font-size: var(--fs-56);
  }

  .page-about .about-stop {
    grid-template-columns: 4.5rem 1fr;
    gap: 1.25rem;
    padding: 1.4rem 1.4rem;
  }

  .page-about .about-stop__year {
    font-size: var(--fs-24);
  }

  .page-about .about-eco__inner {
    padding: 2.75rem 2rem;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 3.5rem) 0 4rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.02fr 1fr;
    gap: 3rem;
  }

  .page-about .about-hero__title {
    font-size: var(--fs-72);
    max-width: 15ch;
  }

  .page-about .about-team__grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-trust__head {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
    align-items: end;
    margin-bottom: 2.25rem;
  }

  .page-about .about-creed__grid {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-eco__inner {
    padding: 3.5rem 3rem;
  }

  .page-about .about-eco__stats {
    gap: 1.5rem 3.5rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 2.5rem);
    align-self: start;
  }

  .page-about .about-rail__note {
    display: block;
    margin: 0 0 1.25rem;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: 0.34em;
    color: var(--gold);
    opacity: 0.6;
  }

  .page-about .about-rail__years {
    flex-direction: column;
    gap: 0.1rem;
    overflow: visible;
    padding: 0.5rem 0 0.5rem 1.5rem;
    border-left: 1px solid var(--gold-line);
  }

  .page-about .about-rail__item::before {
    content: "";
    position: absolute;
    left: -1.5rem;
    top: 50%;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ink);
    border: 1px solid var(--gold-line);
    transform: translate(-50%, -50%);
    transition: background 0.2s var(--bezier), border-color 0.2s var(--bezier), box-shadow 0.2s var(--bezier);
  }

  .page-about .about-rail__item:hover::before,
  .page-about .about-rail__item:focus-within::before {
    background: var(--gold);
    border-color: var(--gold);
    box-shadow: 0 0 0 4px var(--gold-ghost);
  }

  .page-about .about-rail__link {
    width: 100%;
    justify-content: space-between;
    border-color: transparent;
    background: transparent;
    padding: 0.4rem 0.6rem;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: var(--gold-ghost);
    border-color: transparent;
    color: var(--paper);
  }

  .page-about .about-stop:nth-child(3n + 2) {
    margin-left: 2rem;
  }

  .page-about .about-stop:nth-child(3n) {
    margin-right: 2rem;
  }

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

  .page-about .about-trust__card--wide {
    grid-column: span 2;
  }
}

@media (min-width: 1200px) {
  .page-about {
    --about-rail-w: 178px;
  }

  .page-about .about-hero__lead {
    font-size: var(--fs-18);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stop,
  .page-about .about-trust__card,
  .page-about .about-rail__link,
  .page-about .about-bar__seg,
  .page-about .about-creed__link {
    transition: none;
  }

  .page-about .about-stop:hover,
  .page-about .about-stop:target {
    transform: none;
  }
}
<<<END>>>