.page-about {
  background: var(--night);
  color: var(--foam);
  font-family: var(--font-body);
}

.page-about .breadcrumb {
  padding-top: 1.25rem;
  padding-bottom: .25rem;
}

.page-about .eyebrow {
  margin: 0 0 .75rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 82% -10%, rgba(242, 169, 59, .18), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, var(--deep) 100%);
  border-bottom: 2px solid var(--edge);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 8%;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, rgba(242, 169, 59, .5), rgba(242, 169, 59, 0));
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.25rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
}

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

.page-about .about-hero__figure figcaption {
  font-family: var(--font-nav);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--sand);
  padding: .6rem .8rem;
  border-top: 2px solid var(--edge);
  background: var(--abyss);
}

.page-about .about-hero__note {
  margin: 1.25rem 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--amber);
  color: var(--haze);
  font-size: .9375rem;
  line-height: 1.85;
}

.page-about .about-hero__body h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.15rem, 5.4vw, 4.1rem);
  line-height: 1.12;
  letter-spacing: -.01em;
  margin: 0 0 1.25rem;
  color: var(--foam);
}

.page-about .about-hero__lead {
  max-width: 56ch;
  margin: 0 0 2rem;
  color: var(--haze);
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.85;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--edge);
  border: 2px solid var(--edge);
}

.page-about .about-hero__stat {
  background: var(--abyss);
  padding: .9rem 1rem 1rem;
}

.page-about .about-hero__stat dt {
  font-family: var(--font-nav);
  font-size: .75rem;
  letter-spacing: .08em;
  font-weight: 600;
  color: var(--mist);
  margin-bottom: .4rem;
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  color: var(--amber);
  line-height: 1.1;
}

.page-about .about-hero__stat dd span {
  display: block;
  font-family: var(--font-nav);
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--haze);
  margin-top: .35rem;
}

/* ---------- 品牌由来 + 时间线 ---------- */
.page-about .about-origin {
  background: var(--abyss);
  border-bottom: 2px solid var(--edge);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-origin__aside h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: 0 0 1.25rem;
  color: var(--foam);
}

.page-about .about-origin__aside p {
  margin: 0 0 1rem;
  color: var(--haze);
  font-size: 1rem;
  line-height: 1.85;
  max-width: 58ch;
}

.page-about .about-origin__points {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--edge);
}

.page-about .about-origin__points li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: .75rem;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-origin__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 8px;
  height: 8px;
  background: var(--amber);
  transform: rotate(45deg);
}

.page-about .about-origin__subhead {
  font-family: var(--font-nav);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--sand);
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.page-about .about-origin__figure {
  margin: 0 0 2rem;
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
}

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

.page-about .about-origin__figure figcaption {
  font-family: var(--font-nav);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--sand);
  padding: .6rem .8rem;
  border-top: 2px solid var(--edge);
  background: var(--night);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: .8rem;
  bottom: 1.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--amber) 0%, rgba(217, 196, 138, .45) 55%, rgba(46, 70, 99, 0) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-left: 2.5rem;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .85rem;
  width: 16px;
  height: 16px;
  background: var(--abyss);
  border: 2px solid var(--sand);
  transform: rotate(45deg);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .timeline__item:hover::before {
  border-color: var(--amber);
  background: var(--amber);
}

.page-about .timeline__entry > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .35rem .9rem;
  padding: .7rem 0;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--edge);
}

.page-about .timeline__entry > summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline__entry > summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.page-about .timeline__year {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.375rem;
  color: var(--amber);
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--foam);
  transition: color .2s var(--ease);
}

.page-about .timeline__entry > summary:hover .timeline__title {
  color: var(--focus);
}

.page-about .timeline__desc {
  margin: .55rem 0 1.1rem;
  max-width: 54ch;
  color: var(--haze);
  font-size: .9375rem;
  line-height: 1.85;
}

.page-about .timeline__foot {
  margin: 1.75rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--edge);
  color: var(--mist);
  font-size: .875rem;
  line-height: 1.8;
}

.page-about .timeline__foot a,
.page-about .about-reach__foot a,
.page-about .about-cta__more a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 169, 59, .5);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .timeline__foot a:hover,
.page-about .about-reach__foot a:hover,
.page-about .about-cta__more a:hover {
  color: var(--focus);
  border-bottom-color: var(--focus);
}

/* ---------- 团队仪表板 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, var(--deep) 0%, var(--night) 100%);
  border-bottom: 2px solid var(--edge);
}

.page-about .about-team__head {
  max-width: 62ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-team__head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: 0 0 1rem;
  color: var(--foam);
}

.page-about .about-team__lead {
  margin: 0;
  color: var(--haze);
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .team-tile {
  position: relative;
  background: var(--abyss);
  border: 2px solid var(--edge);
  padding: 1.35rem 1.25rem 1.5rem;
  box-shadow: var(--shadow-hard);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .team-tile:hover {
  border-color: var(--amber);
  transform: translate(-2px, -2px);
}

.page-about .team-tile__index {
  font-family: var(--font-nav);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--signal);
  margin: 0 0 .75rem;
}

.page-about .team-tile__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.0625rem;
  margin: 0 0 .5rem;
  color: var(--foam);
}

.page-about .team-tile__num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 2.25rem;
  line-height: 1;
  margin: 0 0 .75rem;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .team-tile__num span {
  font-family: var(--font-nav);
  font-size: .8125rem;
  font-weight: 600;
  color: var(--mist);
  margin-left: .25rem;
}

.page-about .team-tile__desc {
  margin: 0;
  color: var(--haze);
  font-size: .875rem;
  line-height: 1.75;
}

.page-about .team-tile--sum {
  background: var(--deep);
  border-color: var(--sand);
}

.page-about .team-tile--sum .team-tile__index {
  color: var(--sand);
}

.page-about .meter {
  height: 6px;
  margin-top: 1.1rem;
  background: rgba(143, 184, 178, .18);
  overflow: hidden;
}

.page-about .meter > span {
  display: block;
  height: 100%;
  width: var(--pct, 0%);
  background: linear-gradient(90deg, var(--amber) 0%, var(--sand) 100%);
}

.page-about .meter--14 { --pct: 37%; }
.page-about .meter--09 { --pct: 24%; }
.page-about .meter--11 { --pct: 29%; }
.page-about .meter--04 { --pct: 11%; }

.page-about .about-team__figure {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
}

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

.page-about .about-team__figure figcaption {
  font-family: var(--font-nav);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--sand);
  padding: .6rem .8rem;
  border-top: 2px solid var(--edge);
  background: var(--abyss);
}

/* ---------- 覆盖与合作生态 ---------- */
.page-about .about-reach {
  background: var(--abyss);
  border-bottom: 2px solid var(--edge);
}

.page-about .about-reach__head {
  max-width: 62ch;
  margin-bottom: 1.75rem;
}

.page-about .about-reach__head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: 0 0 1rem;
  color: var(--foam);
}

.page-about .about-reach__lead {
  margin: 0;
  color: var(--haze);
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .beacon-rail {
  position: relative;
  height: 46px;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
  border-block: 2px solid var(--edge);
  background:
    linear-gradient(90deg, rgba(242, 169, 59, .22) 0%, rgba(11, 27, 51, 0) 70%);
  overflow: hidden;
}

.page-about .beacon-rail__tick {
  position: absolute;
  left: 0;
  right: 0;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--sand) 0 2px, transparent 2px 22px);
  opacity: .75;
}

.page-about .beacon-rail__tick:nth-child(1) {
  top: 6px;
}

.page-about .beacon-rail__tick:nth-child(2) {
  bottom: 6px;
  opacity: .35;
}

.page-about .beacon-rail::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 26%;
  height: 100%;
  background: linear-gradient(90deg, rgba(242, 169, 59, .55) 0%, rgba(242, 169, 59, 0) 100%);
  pointer-events: none;
}

.page-about .about-reach__scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--edge);
  border: 2px solid var(--edge);
}

.page-about .scene-card {
  background: var(--night);
  padding: 1.4rem 1.25rem 1.6rem;
  transition: background-color .2s var(--ease);
}

.page-about .scene-card:hover {
  background: var(--deep);
}

.page-about .scene-card .tag {
  display: inline-block;
  font-family: var(--font-nav);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .1em;
  padding: .25rem .55rem;
  border: 1px solid currentColor;
  margin: 0 0 .9rem;
}

.page-about .scene-card__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  margin: 0 0 .6rem;
  color: var(--foam);
}

.page-about .scene-card p:last-child {
  margin: 0;
  color: var(--haze);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-about .about-reach__foot {
  margin: 1.5rem 0 0;
  color: var(--mist);
  font-size: .875rem;
  line-height: 1.8;
}

/* ---------- 承诺 ---------- */
.page-about .about-promise {
  background: var(--amber);
  color: var(--abyss);
  border-bottom: 2px solid var(--abyss);
}

.page-about .about-promise__eyebrow {
  color: var(--abyss);
}

.page-about .about-promise__head {
  max-width: 58ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-promise__head h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  margin: 0;
  color: var(--abyss);
}

.page-about .about-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(7, 18, 31, .28);
  border: 2px solid var(--abyss);
}

.page-about .promise-item {
  background: var(--amber);
  padding: 1.35rem 1.25rem 1.5rem;
}

.page-about .promise-item__no {
  display: block;
  font-family: var(--font-nav);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: rgba(7, 18, 31, .62);
  margin-bottom: .7rem;
}

.page-about .promise-item h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.125rem;
  margin: 0 0 .55rem;
  color: var(--abyss);
}

.page-about .promise-item p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: rgba(7, 18, 31, .82);
}

.page-about .about-promise__note {
  margin: 1.5rem 0 0;
  font-family: var(--font-nav);
  font-size: .8125rem;
  line-height: 1.8;
  color: rgba(7, 18, 31, .72);
  padding-top: 1rem;
  border-top: 1px solid rgba(7, 18, 31, .25);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(90% 120% at 15% 0%, rgba(16, 42, 76, .9), transparent 70%),
    var(--night);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
}

.page-about .about-cta__text h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1.25;
  margin: 0 0 .85rem;
  color: var(--foam);
}

.page-about .about-cta__text p {
  margin: 0;
  color: var(--haze);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
}

.page-about .about-cta__more {
  margin: 1.75rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--edge);
  color: var(--mist);
  font-size: .875rem;
  line-height: 1.8;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    align-items: end;
  }

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

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, .62fr) minmax(0, 1.38fr);
    align-items: start;
  }

  .page-about .about-origin__aside {
    position: sticky;
    top: 5rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1080px) {
  .page-about .about-reach__scenes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .team-tile,
  .page-about .scene-card,
  .page-about .timeline__item::before,
  .page-about .timeline__title {
    transition: none;
  }

  .page-about .team-tile:hover {
    transform: none;
  }
}
<<<END>>>