.page-about {
  --about-gap: clamp(2.5rem, 6vw, 5rem);
  background:
    linear-gradient(180deg, rgba(233, 185, 169, .18), rgba(246, 240, 227, 0) 320px),
    var(--paper);
  color: var(--ink);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-crumb {
  padding-top: clamp(1rem, 2.5vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
}

.page-about .about-crumb a {
  color: var(--indigo);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--red);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.25rem, 3vw, 2rem) clamp(2rem, 4vw, 3rem);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 18% 0 8% 0;
  background: linear-gradient(100deg, rgba(35, 59, 104, .14), rgba(35, 59, 104, 0) 62%);
  clip-path: polygon(0 34%, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.page-about .about-eyebrow {
  margin: 0 0 .8rem;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.15rem, 6vw, 4.4rem);
  line-height: 1.14;
  letter-spacing: .01em;
  margin: 0 0 .7em;
  color: var(--ink);
}

.page-about .about-hero__lede {
  font-size: clamp(1rem, 1.6vw, 1.09rem);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 34em;
  margin: 0 0 1.6rem;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-about .about-hero__media {
  margin: 0;
}

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

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 3rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}

.page-about .about-stats li {
  background: var(--paper);
  padding: 1rem .9rem;
  display: flex;
  flex-direction: column;
  gap: .3rem;
}

.page-about .about-stats strong {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(1.4rem, 3vw, 1.95rem);
  letter-spacing: -.02em;
  color: var(--red);
}

.page-about .about-stats span {
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--stone);
  line-height: 1.5;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: var(--about-gap);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section .section-title {
  max-width: 22em;
  font-weight: 400;
}

.page-about .about-lead {
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
  color: var(--ink-soft);
}

.page-about .about-note {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--gold);
  color: var(--ink-soft);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-pillars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
  align-content: start;
}

.page-about .about-pillars li {
  border-left: 2px solid var(--gold);
  padding: .15rem 0 .15rem .95rem;
}

.page-about .about-pillars h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 .3rem;
  color: var(--ink);
}

.page-about .about-pillars p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 时间轴 ---------- */
.page-about .about-section--timeline {
  background: var(--indigo);
  color: var(--paper-3);
  border-top-color: rgba(246, 240, 227, .16);
}

.page-about .about-section--timeline .section-index {
  color: var(--butter);
}

.page-about .about-section--timeline .section-title {
  color: var(--paper-3);
}

.page-about .tl-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: start;
}

.page-about .tl-index__label {
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: rgba(246, 240, 227, .6);
}

.page-about .tl-index ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

.page-about .tl-index a {
  display: block;
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .06em;
  text-decoration: none;
  color: rgba(246, 240, 227, .82);
  padding: .3rem .5rem;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .tl-index a:hover,
.page-about .tl-index a:focus-visible {
  color: var(--paper-3);
  border-color: var(--line-gold);
  background: rgba(201, 162, 75, .16);
}

.page-about .tl-track {
  position: relative;
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  padding-left: 1.7rem;
}

.page-about .tl-track::before {
  content: "";
  position: absolute;
  left: .4rem;
  top: .5rem;
  bottom: .5rem;
  width: 1px;
  background: linear-gradient(180deg, rgba(246, 240, 227, .5), var(--gold) 48%, var(--red));
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1.7rem + .4rem);
  top: .85rem;
  width: 11px;
  height: 11px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--indigo);
  border: 2px solid var(--gold);
}

.page-about .tl-year {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  line-height: 1;
  letter-spacing: .02em;
  margin: 0 0 .55rem;
  color: var(--butter);
}

.page-about .tl-body {
  background: var(--paper-3);
  color: var(--ink);
  border: 1px solid var(--line-gold);
  padding: clamp(.95rem, 2.4vw, 1.4rem);
  box-shadow: 6px 6px 0 -1px rgba(201, 162, 75, .22), var(--shadow-card);
}

.page-about .tl-body h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  margin: .55rem 0 .4rem;
  color: var(--ink);
}

.page-about .tl-body p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .tl-figure {
  margin: 0;
}

.page-about .tl-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .tl-figure figcaption {
  margin-top: .6rem;
  font-size: .78rem;
  line-height: 1.7;
  color: rgba(246, 240, 227, .72);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team .card {
  display: flex;
  flex-direction: column;
  gap: .3rem;
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -.02em;
  color: var(--indigo);
}

.page-about .about-team h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
}

.page-about .about-team p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 评测方法 ---------- */
.page-about .about-section--method {
  background: linear-gradient(180deg, var(--paper-2), var(--paper));
}

.page-about .about-method {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}

.page-about .about-method li {
  background: var(--paper-3);
  padding: 1.1rem 1rem;
}

.page-about .about-method__num {
  display: block;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--gold-deep);
  margin-bottom: .35rem;
}

.page-about .about-method h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 .3rem;
  color: var(--ink);
}

.page-about .about-method p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 视觉与规模 ---------- */
.page-about .about-visual__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .swatches {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: .6rem;
}

.page-about .swatch {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  padding: .55rem;
  border: 1px solid var(--line-gold);
  background: var(--paper-3);
  font-size: .78rem;
}

.page-about .swatch::before {
  content: "";
  display: block;
  height: 44px;
  border: 1px solid rgba(27, 26, 23, .12);
}

.page-about .swatch--red::before { background: #B3261E; }
.page-about .swatch--gold::before { background: #C9A24B; }
.page-about .swatch--indigo::before { background: #233B68; }
.page-about .swatch--green::before { background: #1E4A3D; }
.page-about .swatch--paper::before { background: #F6F0E3; }

.page-about .swatch code {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--stone);
}

.page-about .swatch span {
  color: var(--ink);
}

.page-about .about-scale {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-about .about-scale li {
  display: grid;
  grid-template-columns: minmax(4.5rem, auto) 1fr;
  gap: .9rem;
  align-items: baseline;
  padding-bottom: .7rem;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-scale strong {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1.15rem;
  letter-spacing: -.01em;
  color: var(--green);
}

.page-about .about-scale span {
  font-size: .88rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-visual__media {
  margin: 0;
  align-self: start;
}

.page-about .about-visual__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-visual__media figcaption {
  margin-top: .6rem;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 合作生态 ---------- */
.page-about .about-section--partners {
  background:
    linear-gradient(115deg, rgba(30, 74, 61, .08), rgba(30, 74, 61, 0) 58%),
    var(--paper-2);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.page-about .about-cta {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line-gold);
  background: var(--paper-3);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 1rem;
  justify-items: start;
}

.page-about .about-cta p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-cta {
    grid-template-columns: 1fr auto;
    align-items: center;
    justify-items: stretch;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr .95fr;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.15fr .85fr;
  }

  .page-about .tl-layout {
    grid-template-columns: 132px minmax(0, 1fr);
  }

  .page-about .tl-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-about .tl-index ul {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .tl-track {
    padding-left: 2.2rem;
  }

  .page-about .tl-item::before {
    left: calc(-2.2rem + .4rem);
  }

  .page-about .about-visual__grid {
    grid-template-columns: 1.1fr .9fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-index a {
    transition: none;
  }
}
<<<END>>>