.page-about {
  --about-hair: rgba(110, 91, 122, .22);
  --about-soft: rgba(246, 240, 230, .64);
  --about-soft-line: rgba(246, 240, 230, .16);
  --about-card: #FFFDF8;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(3rem, 7vw, 6rem);
  background:
    radial-gradient(120% 95% at 86% 4%, rgba(217, 164, 65, .20), transparent 58%),
    linear-gradient(168deg, var(--night) 0%, var(--purple) 58%, #351948 100%);
  color: var(--cream);
}

.page-about .about-hero__crumbs {
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
  color: var(--about-soft);
}

.page-about .about-hero__crumbs a {
  color: var(--amber-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease);
}

.page-about .about-hero__crumbs a:hover,
.page-about .about-hero__crumbs a:focus-visible {
  border-bottom-color: var(--amber-soft);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: start;
}

.page-about .about-hero .eyebrow {
  color: var(--celadon);
}

.page-about .about-hero .display {
  margin: 0 0 clamp(1rem, 2vw, 1.5rem);
  color: var(--cream);
  letter-spacing: .015em;
}

.page-about .about-hero .lede {
  max-width: 40ch;
  margin: 0;
  color: rgba(246, 240, 230, .82);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin: clamp(1.75rem, 3vw, 2.5rem) 0 0;
  padding-top: clamp(1.25rem, 3vw, 1.75rem);
  border-top: 1px solid var(--about-soft-line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.page-about .about-stat dt {
  order: 2;
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--about-soft);
}

.page-about .about-stat dd {
  order: 1;
  display: flex;
  align-items: baseline;
  gap: .2rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.15rem);
  line-height: 1;
  color: var(--amber-soft);
}

.page-about .about-stat__unit {
  font-family: var(--font-sans);
  font-size: .95rem;
  color: rgba(246, 240, 230, .72);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--hair-amber);
  background: rgba(26, 11, 38, .58);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__figure .media-frame__caption {
  padding: .85rem 1rem;
  border-top: 1px solid var(--hair-amber);
  font-size: .8rem;
  line-height: 1.6;
  color: var(--about-soft);
}

/* ---------- 团队构成 ---------- */
.page-about .about-roster__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(.85rem, 1.6vw, 1.15rem);
}

.page-about .about-role {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: clamp(1.25rem, 2.6vw, 1.9rem);
  background: var(--about-card);
  border: 1px solid var(--about-hair);
  transition: border-color .3s var(--ease), background-color .3s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: var(--amber);
  background: #FFFFFF;
}

.page-about .about-role__label {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--violet-gray);
}

.page-about .about-role__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 2.9rem);
  line-height: 1;
  color: var(--purple);
}

.page-about .about-role__num span {
  margin-left: .25rem;
  font-family: var(--font-sans);
  font-size: .95rem;
  color: var(--violet-gray);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: .92rem;
  line-height: 1.68;
  color: var(--ink);
}

.page-about .about-role__link {
  margin-top: auto;
  align-self: flex-start;
  padding-top: .55rem;
  font-size: .85rem;
  color: var(--purple);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-amber);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-role__link:hover,
.page-about .about-role__link:focus-visible {
  color: #8A5A0E;
  border-bottom-color: var(--amber);
}

/* ---------- 运营历程 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--cream) 0%, #EFE7DA 100%);
}

.page-about .about-years {
  display: flex;
  gap: .5rem;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding-bottom: .35rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-years a {
  flex: 0 0 auto;
  padding: .42rem .85rem;
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--purple);
  text-decoration: none;
  border: 1px solid var(--about-hair);
  background: rgba(255, 255, 255, .6);
  transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  color: var(--night);
  border-color: var(--amber);
  background: var(--amber-soft);
}

.page-about .about-timeline__figure {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  border: 1px solid var(--about-hair);
  background: var(--night);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 5;
  object-fit: cover;
}

.page-about .about-timeline__figure .media-frame__caption {
  padding: .8rem 1rem;
  border-top: 1px solid var(--hair-dark);
  font-size: .8rem;
  line-height: 1.6;
  color: rgba(246, 240, 230, .66);
}

.page-about .about-track {
  list-style: none;
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  padding: 0;
}

.page-about .about-track__item {
  position: relative;
  padding-left: 2rem;
  padding-bottom: clamp(1.6rem, 3.4vw, 2.5rem);
  scroll-margin-top: 7rem;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(217, 164, 65, .18);
}

.page-about .about-track__item::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1.55rem;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--hair-amber), var(--about-hair));
}

.page-about .about-track__item:last-child {
  padding-bottom: 0;
}

.page-about .about-track__item:last-child::after {
  display: none;
}

.page-about .about-track__year {
  margin: 0 0 .35rem;
  font-family: var(--font-mono);
  font-size: .88rem;
  letter-spacing: .1em;
  color: var(--violet-gray);
}

.page-about .about-track__title {
  margin: 0 0 .4rem;
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--purple);
}

.page-about .about-track__text {
  margin: 0;
  max-width: 62ch;
  font-size: .93rem;
  line-height: 1.72;
  color: var(--ink);
}

/* ---------- 服务规范 ---------- */
.page-about .about-rule-list {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2vw, 1.4rem);
  margin: 0;
  padding: 0;
}

.page-about .about-rule {
  position: relative;
  padding: clamp(1.15rem, 2.4vw, 1.7rem) clamp(1.1rem, 2.4vw, 1.7rem) clamp(1.15rem, 2.4vw, 1.7rem) clamp(1.4rem, 3vw, 2rem);
  background: var(--about-card);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--amber);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-about .about-rule:hover,
.page-about .about-rule:focus-within {
  border-color: var(--amber);
  transform: translateY(-2px);
}

.page-about .about-rule__index {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--celadon);
}

.page-about .about-rule__title {
  margin: 0 0 .45rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--purple);
}

.page-about .about-rule__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-rules__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco {
  background:
    radial-gradient(110% 90% at 12% 0%, rgba(143, 184, 168, .16), transparent 60%),
    linear-gradient(200deg, var(--purple) 0%, var(--night) 100%);
  color: var(--cream);
}

.page-about .about-eco__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.page-about .about-eco__figure {
  margin: 0;
  border: 1px solid var(--hair-amber);
  background: rgba(26, 11, 38, .5);
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-eco__figure .media-frame__caption {
  padding: .8rem 1rem;
  border-top: 1px solid var(--hair-dark);
  font-size: .78rem;
  line-height: 1.6;
  color: rgba(246, 240, 230, .64);
}

.page-about .about-eco .eyebrow--onDark {
  color: var(--celadon);
}

.page-about .about-eco .section-title--onDark {
  margin: 0 0 .9rem;
  color: var(--cream);
}

.page-about .about-eco .lede--onDark {
  margin: 0;
  max-width: 46ch;
  color: rgba(246, 240, 230, .8);
}

.page-about .about-eco__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: clamp(1.1rem, 2.5vw, 1.6rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2.25rem);
  margin: clamp(1.25rem, 3vw, 1.9rem) 0;
  padding-top: clamp(1rem, 2.5vw, 1.5rem);
  border-top: 1px solid var(--about-soft-line);
}

.page-about .about-eco__meta-label {
  margin: 0 0 .3rem;
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--about-soft);
}

.page-about .about-eco__meta-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--amber-soft);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-roster__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-role--lg {
    grid-column: span 6;
  }

  .page-about .about-role--md {
    grid-column: span 3;
  }

  .page-about .about-role--wide {
    grid-column: span 3;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.75rem);
  }

  .page-about .about-roster__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-role--lg {
    grid-column: span 6;
  }

  .page-about .about-role--md {
    grid-column: span 3;
  }

  .page-about .about-role--wide {
    grid-column: span 6;
  }

  .page-about .about-track {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-track__item {
    padding-left: 2.25rem;
  }

  .page-about .about-track__item:nth-last-child(2) {
    padding-bottom: 0;
  }

  .page-about .about-track__item:nth-last-child(2)::after {
    display: none;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }
}

@media (min-width: 1120px) {
  .page-about .about-rule-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-rule,
  .page-about .about-role__link,
  .page-about .about-years a,
  .page-about .about-hero__crumbs a {
    transition: none;
  }

  .page-about .about-rule:hover,
  .page-about .about-rule:focus-within {
    transform: none;
  }
}
<<<END>>>