.page-about {
  --ab-line: #C9D8D4;
  --ab-cut: 16px;
  color: var(--ink);
  background:
    radial-gradient(900px 480px at 84% -6%, rgba(216, 165, 74, .16), transparent 62%),
    linear-gradient(180deg, var(--mist) 0%, var(--fog) 42%, var(--fog) 100%);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .breadcrumbs {
  margin: clamp(16px, 3vw, 28px) 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(18px, 3vw, 32px) 0 clamp(36px, 6vw, 72px);
}

.page-about .about-hero__title {
  margin: 10px 0 18px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(38px, 8.4vw, 76px);
  line-height: 1.0;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.page-about .about-hero__mark {
  position: relative;
  color: var(--jade);
  white-space: nowrap;
}

.page-about .about-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 6px;
  background: linear-gradient(90deg, var(--gold), rgba(216, 165, 74, .1));
  transform: skewX(-12deg);
  z-index: -1;
}

.page-about .about-hero__lede {
  max-width: 46ch;
  color: var(--slate);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__tags li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 6px 12px;
  color: var(--ink);
  background: var(--glow);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 46px), calc(100% - 46px) 100%, 0 100%);
}

.page-about .about-hero__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    padding-top: clamp(28px, 4vw, 48px);
  }

  .page-about .about-hero__figure {
    margin-bottom: -28px;
    transform: translateY(-8px);
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: clamp(40px, 6vw, 88px) 0;
}

.page-about .about-section--mist {
  background: linear-gradient(180deg, rgba(215, 230, 236, .9), rgba(215, 230, 236, .35));
}

.page-about .about-section--fog {
  background: linear-gradient(180deg, rgba(244, 248, 247, .9), rgba(244, 248, 247, .2));
}

.page-about .about-section__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 48px);
}

.page-about .about-section__num {
  display: block;
  font-size: clamp(52px, 9vw, 104px);
  line-height: .82;
  font-weight: 800;
  color: var(--jade);
  opacity: .9;
  letter-spacing: -0.04em;
}

.page-about .about-section__title {
  margin: 8px 0 14px;
  font-size: clamp(26px, 4.2vw, 42px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-section__intro {
  margin: 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-section__cta {
  margin-top: 20px;
}

@media (min-width: 900px) {
  .page-about .about-section__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(32px, 5vw, 80px);
    align-items: start;
  }

  .page-about .about-section__head {
    position: sticky;
    top: 32px;
  }

  .page-about .about-section__head::after {
    content: "";
    display: block;
    width: 64px;
    height: 2px;
    margin-top: 26px;
    background: linear-gradient(90deg, var(--cinnabar), var(--gold));
  }
}

/* ---------- 规模数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--board);
  border-top: 1px solid var(--board);
  border-bottom: 1px solid var(--board);
}

.page-about .about-stat {
  background: var(--fog);
  padding: 20px 16px 22px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.page-about .about-stat__unit {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--jade);
}

.page-about .about-stat__label {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--slate);
}

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

  .page-about .about-stat {
    padding: 26px 18px 28px;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), var(--jade));
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 26px 34px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--fog);
  border: 2px solid var(--gold);
}

.page-about .about-tl__item--mark::before {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-about .about-tl__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--night);
}

.page-about .about-tl__item--mark .about-tl__year {
  color: var(--cinnabar);
  border-bottom: 2px solid var(--cinnabar);
}

.page-about .about-tl__title {
  margin: 6px 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-tl__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

@media (min-width: 900px) {
  .page-about .about-tl {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0 clamp(12px, 1.6vw, 24px);
    padding-top: 8px;
  }

  .page-about .about-tl::before {
    left: 0;
    right: 0;
    top: 7px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--gold), var(--jade));
  }

  .page-about .about-tl__item {
    padding: 34px 0 0;
  }

  .page-about .about-tl__item::before {
    top: 0;
  }
}

/* ---------- 团队与内容 ---------- */
.page-about .about-team__wrap {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.page-about .about-team__card {
  position: relative;
  background: var(--fog);
  padding: 18px 16px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  box-shadow: inset 0 3px 0 0 var(--jade);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-2px);
  box-shadow: inset 0 3px 0 0 var(--gold);
}

.page-about .about-team__role {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-cats {
  padding: 18px 0 4px;
  border-top: 1px solid var(--ab-line);
}

.page-about .about-cats__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .about-cats__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cats__list li {
  padding: 7px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--night);
  background: linear-gradient(135deg, var(--glow), rgba(240, 217, 166, .35));
  border-left: 3px solid var(--jade);
}

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

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

.page-about .about-team__figure .media-frame__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-eco__body {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-about .about-eco__nodes {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__node {
  position: relative;
  background: var(--fog);
  border-left: 3px solid var(--jade);
  padding: 16px 18px 18px;
  transition: border-color .28s var(--ease), transform .28s var(--ease), background .28s var(--ease);
}

.page-about .about-eco__node:hover,
.page-about .about-eco__node:focus-within {
  border-left-color: var(--gold);
  background: linear-gradient(100deg, rgba(240, 217, 166, .5), var(--fog) 70%);
  transform: translateX(2px);
}

.page-about .about-eco__count {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--jade);
}

.page-about .about-eco__name {
  margin: 6px 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-eco__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

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

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-about .about-honor {
  position: relative;
  background: var(--night);
  color: var(--fog);
  padding: clamp(20px, 3vw, 30px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-honor::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--cinnabar);
}

.page-about .about-honor__year {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--glow);
}

.page-about .about-honor__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 800;
  line-height: 1.25;
}

.page-about .about-honor__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 248, 247, .82);
}

@media (min-width: 760px) {
  .page-about .about-eco__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cadence__step {
  position: relative;
  background: var(--fog);
  padding: 20px 18px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  border-top: 3px solid var(--gold);
}

.page-about .about-cadence__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  padding: 4px 10px;
  color: var(--night);
  background: rgba(201, 216, 212, .6);
}

.page-about .about-cadence__title {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-cadence__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

@media (min-width: 760px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  position: relative;
  margin: clamp(28px, 5vw, 56px) 0 0;
  padding: clamp(26px, 4.4vw, 48px) clamp(20px, 4vw, 44px) clamp(28px, 4.4vw, 44px);
  background: linear-gradient(120deg, var(--night), #1b3a46 70%);
  color: var(--fog);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%);
}

.page-about .about-close__path {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
  margin-bottom: 12px;
  color: var(--gold);
  opacity: .8;
}

.page-about .about-close__path path {
  stroke-dasharray: 620;
  stroke-dashoffset: 0;
  animation: about-feather .6s var(--ease) both;
}

@keyframes about-feather {
  from { stroke-dashoffset: 620; }
  to { stroke-dashoffset: 0; }
}

.page-about .about-close__eyebrow {
  color: var(--glow);
}

.page-about .about-close__title {
  margin: 8px 0 10px;
  font-size: clamp(24px, 3.6vw, 38px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-close__text {
  margin: 0 0 22px;
  font-size: 15px;
  color: rgba(244, 248, 247, .78);
}

.page-about .about-close__links {
  display: grid;
  gap: 10px;
}

.page-about .about-close__link {
  display: block;
  padding: 14px 16px;
  text-decoration: none;
  color: var(--fog);
  border: 1px solid rgba(240, 217, 166, .35);
  background: rgba(244, 248, 247, .05);
  transition: border-color .28s var(--ease), background .28s var(--ease), transform .28s var(--ease);
}

.page-about .about-close__link:hover,
.page-about .about-close__link:focus-visible {
  border-color: var(--gold);
  background: rgba(216, 165, 74, .16);
  transform: translateY(-2px);
}

.page-about .about-close__link-k {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .about-close__link-v {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 248, 247, .72);
}

@media (min-width: 760px) {
  .page-about .about-close__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-close__path path {
    animation: none;
    stroke-dashoffset: 0;
  }

  .page-about .about-team__card,
  .page-about .about-eco__node,
  .page-about .about-close__link {
    transition: none;
  }
}

/* 内容始终可读，动效仅作点缀 */
.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}
<<<END>>>