.page-about {
  --about-axis: rgba(138, 151, 163, .38);
  --about-node-a: var(--moss);
  --about-node-b: var(--clay);
  --about-node-c: var(--cyan);
  --about-cell: rgba(138, 151, 163, .22);
  background: var(--bone);
  color: var(--graphite);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: calc(var(--head-h) * -1);
  padding-top: calc(var(--head-h) + 40px);
  padding-bottom: 56px;
  background: linear-gradient(124deg, var(--ink-dark) 0%, var(--ink) 48%, #0e3557 100%);
  color: var(--bone);
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(138, 151, 163, .16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 151, 163, .16) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(158deg, rgba(0, 0, 0, .85), transparent 74%);
  mask-image: linear-gradient(158deg, rgba(0, 0, 0, .85), transparent 74%);
  pointer-events: none;
}

.page-about .about-hero__beam {
  position: absolute;
  top: 0;
  right: 0;
  width: 62%;
  height: 100%;
  background: linear-gradient(148deg, rgba(22, 217, 192, .16) 0%, rgba(22, 217, 192, 0) 62%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .02em;
  color: rgba(245, 242, 234, .62);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 10px;
  color: rgba(245, 242, 234, .35);
}

.page-about .about-crumbs a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .about-crumbs a:hover {
  color: var(--cyan-soft);
}

.page-about .about-eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(34px, 8.6vw, 64px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--bone);
}

.page-about .about-hero__lead {
  margin: 0 0 34px;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--on-ink);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 34px;
  padding: 0;
  list-style: none;
  max-width: 820px;
  background: var(--about-cell);
  border: 1px solid var(--about-cell);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 16px 18px;
  background: rgba(6, 27, 48, .74);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-fact__unit {
  font-size: 18px;
  margin-left: 2px;
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--on-ink);
}

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

/* ---------- 主体栅格 ---------- */
.page-about .about-body {
  padding: 44px 0 64px;
}

.page-about .about-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.page-about .about-main {
  min-width: 0;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding: 0 0 56px;
  scroll-margin-top: calc(var(--head-h) + 24px);
}

.page-about .about-sec:last-child {
  padding-bottom: 8px;
}

.page-about .about-sec__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.page-about .ly-sec-no {
  font-family: var(--font-mono);
  font-size: clamp(40px, 11vw, 62px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--ink);
  opacity: .22;
  border-bottom: 1px solid var(--about-axis);
  padding-bottom: 12px;
  display: block;
  max-width: 96px;
}

.page-about .about-sec__head .ly-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 5.4vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .about-sec__body > p {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-sec__body--tail > p {
  margin-top: 24px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl-media {
  margin: 26px 0 34px;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0 28px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 40px;
  width: 1px;
  background: linear-gradient(to bottom, var(--moss) 0%, var(--clay) 50%, var(--cyan) 100%);
  opacity: .5;
}

.page-about .about-tl {
  position: relative;
  padding: 0 0 38px;
}

.page-about .about-tl:last-child {
  padding-bottom: 8px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bone);
  border: 1px solid var(--about-node, var(--stone));
  box-shadow: 0 0 0 4px var(--bone);
  z-index: 1;
}

.page-about .about-tl--a { --about-node: var(--about-node-a); }
.page-about .about-tl--b { --about-node: var(--about-node-b); }
.page-about .about-tl--c { --about-node: var(--about-node-c); }

.page-about .about-tl__stage {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border: 1px solid var(--about-node, var(--stone));
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--about-node, var(--stone));
}

.page-about .about-tl__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-tl__inner > p {
  margin: 0 0 12px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-tl__metric {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-cell);
  max-width: 38em;
}

.page-about .about-tl__metric b {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-tl__metric span {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

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

.page-about .about-team__body > p {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 26px;
  background: var(--about-cell);
  border: 1px solid var(--about-cell);
}

.page-about .about-role {
  padding: 20px 18px 22px;
  background: var(--bone);
}

.page-about .about-role__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-role .ly-h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 流程 ---------- */
.page-about .about-process {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .about-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--about-cell);
}

.page-about .about-step:last-child {
  border-bottom: 1px solid var(--about-cell);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .about-step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-step p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--graphite);
}

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

/* ---------- 合作伙伴 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 24px;
  background: var(--about-cell);
  border: 1px solid var(--about-cell);
}

.page-about .about-partner {
  padding: 22px 20px 24px;
  background: var(--bone);
}

.page-about .about-partner .ly-h3 {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--about-cell);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: 30px 22px 32px;
  background: linear-gradient(118deg, var(--ink-dark) 0%, var(--ink) 70%, #10395c 100%);
  color: var(--bone);
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -60%;
  width: 70%;
  height: 140%;
  background: linear-gradient(180deg, rgba(22, 217, 192, .2), rgba(22, 217, 192, 0));
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-cta__body {
  position: relative;
  z-index: 1;
}

.page-about .about-cta__body p {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--on-ink);
}

.page-about .about-cta__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-self: end;
}

.page-about .about-more {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-more a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 1px;
}

.page-about .about-more a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 侧栏目录 ---------- */
.page-about .about-aside {
  min-width: 0;
}

.page-about .about-outline {
  border-left: 1px solid var(--about-axis);
  padding-left: 18px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .about-sec {
    padding-bottom: 68px;
  }

  .page-about .about-tl__inner > p {
    font-size: 17px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-bottom: 76px;
  }

  .page-about .about-hero__lead {
    max-width: 36em;
  }

  .page-about .about-body {
    padding: 64px 0 80px;
  }

  .page-about .about-body__inner {
    grid-template-columns: minmax(0, 1fr) 212px;
    gap: 64px;
  }

  .page-about .about-aside {
    position: sticky;
    top: calc(var(--head-h) + 32px);
    align-self: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .about-process {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: 40px;
  }

  .page-about .about-tl:nth-child(2) .about-tl__inner {
    padding-left: 44px;
  }

  .page-about .about-tl:nth-child(3) .about-tl__inner {
    padding-left: 88px;
  }

  .page-about .about-sec__body > p,
  .page-about .about-team__body > p {
    max-width: 62%;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 40px;
    padding: 44px 40px 46px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-body__inner {
    grid-template-columns: minmax(0, 1fr) 236px;
    gap: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__beam,
  .page-about .about-cta::after {
    transition: none;
  }
}
<<<END>>>