.page-about {
  --about-line: 1px solid var(--c-graphite);
  --about-rail: 84px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 22px 0 56px;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 86% -10%, rgba(43, 232, 214, .13), transparent 62%),
    radial-gradient(90% 70% at -10% 110%, rgba(255, 106, 31, .10), transparent 60%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -26%;
  width: 78%;
  height: 62%;
  background: linear-gradient(118deg, rgba(43, 232, 214, .10), rgba(255, 106, 31, .05));
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 26px;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-about .about-hero__lead h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.2vw, 68px);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--c-mist);
}

.page-about .about-hero__intro {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-rock);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* 速览面板 */
.page-about .about-facts {
  padding: 22px 20px 24px;
  border: 1px solid var(--c-graphite);
  background: linear-gradient(180deg, rgba(16, 21, 28, .96), rgba(6, 8, 11, .92));
}

.page-about .about-facts__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-about .about-facts__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 18px;
  margin: 18px 0 0;
}

.page-about .about-facts__cell {
  padding-top: 10px;
  border-top: 1px solid var(--c-graphite);
}

.page-about .about-facts__list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-rock);
}

.page-about .about-facts__list dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-about .about-facts__unit {
  margin-left: 4px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-rock);
}

/* ---------- 通用小节头 ---------- */
.page-about .about-sec-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -.005em;
  color: var(--c-mist);
}

.page-about .about-sec-head__desc {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-rock);
}

/* ---------- 起点与定位 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-origin__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.16;
  color: var(--c-mist);
}

.page-about .about-origin__body p {
  margin: 0 0 1.2em;
  color: var(--c-rock);
}

.page-about .about-origin__body p:first-child {
  color: var(--c-mist);
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
  padding-top: 16px;
  border-top: 1px solid var(--c-graphite);
}

/* ---------- 三条主张 ---------- */
.page-about .about-claims__list {
  display: grid;
  gap: 18px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-claim {
  position: relative;
  padding: 26px 20px 22px;
  background: var(--c-panel);
  border: 1px solid var(--c-graphite);
  border-radius: var(--r);
  transition: transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}

.page-about .about-claim::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 48px;
  height: 3px;
  background: var(--c-cyan);
}

.page-about .about-claim:hover,
.page-about .about-claim:focus-within {
  transform: translateY(-2px);
  border-color: var(--c-cyan);
  background: #121a23;
}

.page-about .about-claim__idx {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-cyan);
  border: 1px solid var(--c-graphite);
  border-radius: 3px;
}

.page-about .about-claim h3 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.3;
  color: var(--c-mist);
}

.page-about .about-claim p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-rock);
}

.page-about .about-claim__metric {
  margin-top: 18px !important;
  padding-top: 12px;
  border-top: 1px dashed var(--c-graphite);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-green) !important;
}

/* ---------- 发展阶段 ---------- */
.page-about .about-timeline__figure {
  margin: 28px 0 0;
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 22px;
  margin-top: 36px;
}

.page-about .about-years {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .about-years__link {
  flex: 0 0 auto;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-rock);
  text-decoration: none;
  border: 1px solid var(--c-graphite);
  border-radius: 4px;
  white-space: nowrap;
  transition: color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  color: var(--c-void);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

.page-about .about-stages {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stage {
  padding: 22px 20px;
  background: linear-gradient(180deg, rgba(16, 21, 28, .78), rgba(6, 8, 11, .55));
  border: 1px solid var(--c-graphite);
  border-left: 2px solid var(--c-teal);
  border-radius: 0 var(--r) var(--r) 0;
  scroll-margin-top: calc(var(--header-h) + 28px);
  transition: border-left-color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-stage:hover {
  border-left-color: var(--c-cyan);
  border-color: var(--c-graphite);
}

.page-about .about-stage__year {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
}

.page-about .about-stage h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.32;
  color: var(--c-mist);
}

.page-about .about-stage__body {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-rock);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  align-items: start;
}

.page-about .about-team__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.16;
  color: var(--c-mist);
}

.page-about .about-team__text > p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-rock);
}

.page-about .about-team__list {
  display: grid;
  gap: 2px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--c-graphite);
}

.page-about .about-team__key {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-lava);
}

.page-about .about-team__val {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-rock);
}

.page-about .about-map {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  margin-top: 22px;
}

.page-about .about-map__line {
  stroke: var(--c-graphite);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}

.page-about .about-map__dot {
  fill: var(--c-cyan);
}

.page-about .about-map__dot--alt {
  fill: var(--c-lava);
}

.page-about .about-map__label {
  fill: var(--c-rock);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}

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

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

/* ---------- 内容与数据 ---------- */
.page-about .about-ops__grid {
  display: grid;
  gap: 28px;
  margin-top: 30px;
}

.page-about .about-clock {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--c-graphite);
}

.page-about .about-clock li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-top: 1px solid var(--c-graphite);
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-rock);
}

.page-about .about-clock__t {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-cyan);
}

.page-about .about-ops__body p {
  margin: 0 0 1.2em;
  color: var(--c-rock);
}

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

/* ---------- 生态合作 ---------- */
.page-about .about-eco__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

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

.page-about .about-eco__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.16;
  color: var(--c-mist);
}

.page-about .about-eco__text p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-rock);
}

.page-about .about-eco__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-eco__stat {
  padding: 14px 12px;
  border: 1px solid var(--c-graphite);
  border-radius: var(--r);
  background: rgba(16, 21, 28, .7);
}

.page-about .about-eco__num {
  display: block;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--c-green);
}

.page-about .about-eco__cap {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--c-rock);
}

/* ---------- 接下来 ---------- */
.page-about .about-next__list {
  display: grid;
  gap: 16px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__item {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--c-graphite);
  border-radius: var(--r);
  background: rgba(16, 21, 28, .55);
  transition: transform .22s var(--ease), border-color .22s var(--ease);
}

.page-about .about-next__item:hover {
  transform: translateY(-2px);
  border-color: var(--c-teal);
}

.page-about .about-next__idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
}

.page-about .about-next__item h3 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  color: var(--c-mist);
}

.page-about .about-next__item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-rock);
}

.page-about .about-next__cta {
  margin-top: 32px;
  padding: 26px 22px;
  border: 1px solid var(--c-graphite);
  border-left: 3px solid var(--c-lava);
  border-radius: 0 var(--r) var(--r) 0;
  background: linear-gradient(100deg, rgba(255, 106, 31, .08), rgba(6, 8, 11, .6) 62%);
}

.page-about .about-next__cta-text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 28px 0 72px;
  }

  .page-about .about-facts {
    padding: 24px 24px 26px;
  }

  .page-about .about-claims__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-origin__head {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .about-claims__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }

  .page-about .about-claim:nth-child(2) {
    margin-top: 28px;
  }

  .page-about .about-claim:nth-child(3) {
    margin-top: 8px;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-years__link {
    padding: 8px 0 8px 14px;
    text-align: left;
    border: 0;
    border-left: 2px solid var(--c-graphite);
    border-radius: 0;
    background: transparent;
  }

  .page-about .about-years__link:hover,
  .page-about .about-years__link:focus-visible {
    color: var(--c-cyan);
    background: transparent;
    border-left-color: var(--c-cyan);
  }

  .page-about .about-stages {
    gap: 20px;
  }

  .page-about .about-stage {
    padding: 26px 26px;
  }

  .page-about .about-stages .about-stage:nth-child(even) {
    margin-left: 28px;
  }

  .page-about .about-ops__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 48px;
    margin-top: 36px;
  }

  .page-about .about-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-next__cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 28px 30px;
  }

  .page-about .about-next__actions {
    margin-top: 0;
    flex: 0 0 auto;
  }
}

@media (min-width: 1180px) {
  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
  }

  .page-about .about-team__grid {
    gap: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-claim,
  .page-about .about-next__item,
  .page-about .about-stage,
  .page-about .about-years__link {
    transition: none;
  }

  .page-about .about-claim:hover,
  .page-about .about-next__item:hover {
    transform: none;
  }
}
<<<END>>>