.page-about {
  --about-hair: rgba(244, 241, 232, 0.16);
  --about-glow: rgba(227, 168, 59, 0.14);
  background:
    radial-gradient(88% 40% at 88% 0%, rgba(44, 61, 114, 0.52), transparent 62%),
    var(--c-indigo-deep);
  color: var(--c-on-dark);
  font-family: var(--font-body);
  padding-bottom: var(--gap-xl);
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* ---------- 通用文字 ---------- */

.page-about .about-p {
  font-size: 17px;
  line-height: 1.9;
  color: var(--c-on-dark);
  margin: 0 0 var(--gap-m);
  max-width: 34em;
}

.page-about .about-band--cream .about-p {
  color: var(--c-ink);
}

.page-about .about-band--cream .about-p:last-child {
  margin-bottom: 0;
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-gold);
  margin: 0 0 12px;
}

.page-about .about-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: currentColor;
  flex: none;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.4vw, 40px);
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--c-white);
  margin: 0 0 var(--gap-m);
  max-width: 20em;
}

.page-about .about-section__head {
  max-width: 46rem;
  margin-bottom: var(--gap-l);
}

.page-about .about-section__lede {
  font-size: 17px;
  line-height: 1.9;
  color: var(--c-on-dark);
  max-width: 34em;
  margin: 0;
}

.page-about .about-band--cream .about-kicker {
  color: var(--c-indigo-soft);
}

.page-about .about-band--cream .about-h2 {
  color: var(--c-indigo-deep);
}

.page-about .about-band--cream .about-section__lede {
  color: var(--c-ink);
}

/* ---------- 版块底色 ---------- */

.page-about .about-band {
  padding: var(--gap-xl) 0;
}

.page-about .about-band--cream {
  background: var(--c-cream);
  color: var(--c-ink);
}

.page-about .about-band--glass {
  background: linear-gradient(180deg, rgba(44, 61, 114, 0.44), rgba(44, 61, 114, 0.12));
  border-top: 1px solid rgba(111, 175, 149, 0.22);
  border-bottom: 1px solid rgba(111, 175, 149, 0.22);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: var(--gap-l) 0 var(--gap-xl);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--gap-l);
  align-items: start;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 54px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--c-white);
  margin: 0 0 var(--gap-m);
  max-width: 15em;
}

.page-about .about-lede {
  font-size: 17px;
  line-height: 1.9;
  color: var(--c-on-dark);
  max-width: 32em;
  margin: 0;
}

.page-about .about-metrics {
  list-style: none;
  margin: var(--gap-l) 0 0;
  padding: var(--gap-m) 0 0;
  border-top: 1px solid var(--about-hair);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-m);
}

.page-about .about-metrics__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 5vw, 28px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-gold);
  line-height: 1.1;
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--c-on-dark-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--gap-l);
}

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

.page-about .about-hero__media .media__img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- 品牌缘起 ---------- */

.page-about .about-origin__body {
  max-width: 44rem;
}

.page-about .about-origin__note {
  margin-top: var(--gap-l);
  border-radius: var(--radius-m);
  padding: var(--gap-l);
}

.page-about .about-origin__note p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-on-dark);
}

/* ---------- 时间线导航 ---------- */

.page-about .about-tl-nav {
  position: sticky;
  top: calc(var(--topbar-h) + 10px);
  z-index: 6;
  margin-bottom: var(--gap-l);
}

.page-about .about-tl-nav__inner {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 7px;
  border-radius: var(--radius-pill);
  background: var(--c-glass);
  border: 1px solid rgba(22, 34, 74, 0.14);
  box-shadow: var(--shadow-float);
  backdrop-filter: blur(10px);
}

.page-about .about-tl-nav a {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--c-indigo);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-tl-nav a[aria-current="true"] {
  background: var(--c-gold);
  color: var(--c-indigo-deep);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  display: grid;
  gap: var(--gap-l);
}

.page-about .about-timeline__aside {
  order: 2;
}

.page-about .about-timeline__figure {
  margin: 0;
  position: relative;
}

.page-about .about-timeline__figure .media__img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  order: 1;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-jade) 55%, var(--c-indigo-soft));
  opacity: 0.7;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 var(--gap-xl) 42px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-indigo-deep);
  border: 3px solid var(--c-gold);
  box-shadow: 0 0 0 5px var(--about-glow);
}

.page-about .tl-item__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(24px, 6vw, 34px);
  letter-spacing: 0.04em;
  line-height: 1.1;
  color: var(--c-gold);
  margin-right: 12px;
}

.page-about .tl-item .tag {
  vertical-align: middle;
}

.page-about .tl-item__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 4vw, 24px);
  line-height: 1.4;
  color: var(--c-white);
  margin: 10px 0 10px;
}

.page-about .tl-item__desc {
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-on-dark);
  margin: 0;
  max-width: 36em;
}

.page-about .tl-more {
  margin-top: 16px;
  border-radius: var(--radius-m);
  background: rgba(44, 61, 114, 0.36);
  border: 1px solid rgba(111, 175, 149, 0.3);
  overflow: hidden;
  max-width: 36em;
}

.page-about .tl-more__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-jade-soft);
}

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

.page-about .tl-more__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-gold);
  transition: transform var(--dur) var(--ease);
}

.page-about .tl-more[open] .tl-more__summary::after {
  transform: rotate(45deg);
}

.page-about .tl-more__list {
  margin: 0;
  padding: 0 18px 18px 36px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-on-dark);
}

.page-about .tl-more__list li {
  margin-bottom: 8px;
}

.page-about .tl-more__list li:last-child {
  margin-bottom: 0;
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: var(--gap-l);
}

.page-about .about-team__figure {
  margin: 0;
  position: relative;
}

.page-about .about-team__figure .media__img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-stats {
  list-style: none;
  margin: var(--gap-l) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-m);
}

.page-about .about-stats__item {
  background: var(--c-white);
  border: 1px solid var(--c-jade-soft);
  border-left: 3px solid var(--c-jade);
  border-radius: var(--radius-s);
  padding: 16px 14px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 26px;
  letter-spacing: 0.04em;
  line-height: 1.1;
  color: var(--c-indigo);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--c-slate);
}

/* ---------- 设计语言 ---------- */

.page-about .about-lexicon {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--gap-l);
}

.page-about .about-lexicon__item {
  border-top: 2px solid rgba(227, 168, 59, 0.55);
  padding-top: 18px;
}

.page-about .about-lexicon__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--c-jade);
  margin-bottom: 10px;
}

.page-about .about-lexicon__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
  color: var(--c-white);
  margin: 0 0 10px;
}

.page-about .about-lexicon__desc {
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-on-dark);
  margin: 0;
  max-width: 32em;
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  display: grid;
  gap: var(--gap-l);
}

.page-about .about-eco__text .about-p:last-child {
  margin-bottom: 0;
}

.page-about .about-eco__panel {
  border-radius: var(--radius-l);
  padding: var(--gap-l);
}

.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 42px;
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--c-gold);
  margin: 0;
}

.page-about .about-eco__label {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-on-dark);
}

.page-about .about-eco__rule {
  height: 1px;
  border: 0;
  background: var(--about-hair);
  margin: 18px 0;
}

.page-about .about-eco__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--c-on-dark-soft);
}

/* ---------- 认可与荣誉 ---------- */

.page-about .about-honor {
  display: grid;
  gap: var(--gap-l);
}

.page-about .about-honor__badge {
  border-radius: var(--radius-l);
  background: var(--c-indigo);
  padding: var(--gap-l);
  text-align: center;
  box-shadow: var(--shadow-card);
}

.page-about .about-honor__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(40px, 9vw, 62px);
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--c-gold);
  margin: 0;
}

.page-about .about-honor__caption {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-on-dark);
}

.page-about .about-honor__body .about-p:last-child {
  margin-bottom: 0;
}

/* ---------- 加入与洽谈 ---------- */

.page-about .about-cta__panel {
  border-radius: var(--radius-l);
  padding: var(--gap-xl) var(--gap-l);
  background:
    linear-gradient(135deg, rgba(227, 168, 59, 0.18), rgba(111, 175, 149, 0.14) 58%, transparent),
    var(--c-indigo);
  border: 1px solid rgba(227, 168, 59, 0.34);
}

.page-about .about-cta__text .about-p {
  margin-bottom: 0;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--gap-l);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__actions,
  .page-about .about-cta__actions {
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-band {
    padding: calc(var(--gap-xl) * 1.18) 0;
  }

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

  .page-about .about-lexicon__item:nth-child(2) {
    margin-top: 56px;
  }

  .page-about .about-lexicon__item:nth-child(3) {
    margin-left: 8%;
  }

  .page-about .about-lexicon__item:nth-child(4) {
    margin-top: 56px;
    margin-right: 6%;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--gap-xl);
    align-items: start;
  }

  .page-about .about-team__figure {
    margin-top: 26px;
  }

  .page-about .about-eco {
    grid-template-columns: 1.12fr 0.88fr;
    gap: var(--gap-xl);
    align-items: center;
  }

  .page-about .about-honor {
    grid-template-columns: 0.78fr 1.22fr;
    gap: var(--gap-xl);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero {
    padding-top: var(--gap-m);
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.04fr 0.96fr;
    gap: var(--gap-xl);
  }

  .page-about .about-hero__media {
    margin-top: 52px;
  }

  .page-about .about-tl-nav {
    top: 14px;
  }

  .page-about .about-timeline {
    grid-template-columns: 0.6fr 1.4fr;
    gap: var(--gap-xl);
    align-items: start;
  }

  .page-about .about-timeline__aside {
    order: 1;
  }

  .page-about .about-timeline__figure {
    position: sticky;
    top: 96px;
  }

  .page-about .about-timeline__list {
    order: 2;
    padding-left: 0;
  }

  .page-about .about-p--shift {
    margin-left: 9%;
    max-width: 31em;
  }

  .page-about .about-origin__body {
    margin-left: 6%;
  }

  .page-about .about-origin__note {
    margin-left: 9%;
  }
}

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