.page-about {
  --pa-pad: clamp(56px, 8vw, 104px);
  --pa-rail: 158px;
  background: var(--paper);
  color: var(--blue-900);
  overflow-x: clip;
}

/* ---------- 页头面包屑（深底） ---------- */
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(22px, 3vw, 34px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .breadcrumb__list li {
  list-style: none;
}

.page-about .breadcrumb__link {
  color: rgba(244, 246, 250, 0.62);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--acid);
  border-bottom-color: var(--acid);
}

.page-about .breadcrumb__sep {
  color: rgba(244, 246, 250, 0.3);
}

.page-about .breadcrumb__current {
  color: var(--orange-300);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: calc(var(--header-h) + clamp(28px, 5vw, 52px)) 0 0;
  color: var(--paper);
  background:
    radial-gradient(115% 85% at 88% -12%, rgba(255, 90, 31, 0.36), transparent 58%),
    radial-gradient(90% 70% at 4% 106%, rgba(27, 62, 107, 0.9), transparent 72%),
    linear-gradient(158deg, #08152b 0%, #0f2544 60%, #06101f 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    114deg,
    rgba(255, 255, 255, 0.035) 0 1px,
    transparent 1px 6px
  );
}

.page-about .about-hero .eyebrow {
  color: var(--orange-300);
  margin: 0 0 clamp(16px, 2.4vw, 22px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-bottom: clamp(34px, 5vw, 56px);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 6.2vw, 74px);
  line-height: 1.06;
  letter-spacing: -0.035em;
}

.page-about .about-hero__dek {
  margin: 0;
  max-width: 54ch;
  font-size: clamp(16px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: rgba(244, 246, 250, 0.82);
}

.page-about .about-hero__aside {
  padding-left: 18px;
  border-left: 3px solid var(--orange);
}

.page-about .about-hero__aside-text {
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(244, 246, 250, 0.72);
  max-width: 32ch;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(220, 227, 238, 0.16);
  border-top: 1px solid rgba(220, 227, 238, 0.16);
}

.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px 22px;
  background: rgba(6, 16, 31, 0.62);
}

.page-about .about-stats__n {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--acid);
}

.page-about .about-stats__k {
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(244, 246, 250, 0.6);
}

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

/* ---------- 区块骨架 ---------- */
.page-about .about-band {
  padding: var(--pa-pad) 0;
}

.page-about .about-band--dark {
  background: linear-gradient(178deg, #08152b 0%, #0f2544 118%);
  color: var(--paper);
}

.page-about .about-band--mist {
  background: linear-gradient(180deg, #ffe2d3 0%, #fff4ee 62%, var(--paper) 100%);
}

.page-about .about-sec {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
}

@media (min-width: 900px) {
  .page-about .about-sec {
    grid-template-columns: var(--pa-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
  }
}

.page-about .about-sec__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-sec__rail .chapter-no {
  font-family: var(--font-mono);
  font-size: clamp(36px, 5vw, 62px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.06em;
  color: var(--orange);
}

.page-about .about-band--dark .about-sec__rail .chapter-no {
  color: var(--orange-300);
}

.page-about .about-sec__tag {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--blue-900);
  background: var(--mist);
  clip-path: polygon(0 0, 100% 0, 100% 66%, calc(100% - 8px) 100%, 0 100%);
}

@media (min-width: 900px) {
  .page-about .about-sec__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }
}

.page-about .about-sec__h {
  margin: 0 0 clamp(16px, 2.2vw, 26px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.5vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-about .about-sec__body > p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: #26364d;
}

.page-about .about-band--dark .about-sec__body > p {
  color: rgba(244, 246, 250, 0.8);
}

.page-about .about-sec__h + p {
  color: var(--ink-soft);
}

.page-about .about-band--dark .about-sec__h + p {
  color: rgba(244, 246, 250, 0.66);
}

/* ---------- 时间线 ---------- */
.page-about .about-years {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  display: flex;
  gap: 6px;
  margin: clamp(20px, 3vw, 30px) 0 clamp(26px, 3.6vw, 42px);
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
  background: linear-gradient(180deg, rgba(8, 21, 43, 0.98), rgba(8, 21, 43, 0.88));
  border-bottom: 1px solid rgba(220, 227, 238, 0.18);
  backdrop-filter: blur(8px);
}

.page-about .about-years::-webkit-scrollbar {
  display: none;
}

.page-about .about-years a {
  flex: 0 0 auto;
  padding: 7px 15px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(244, 246, 250, 0.7);
  text-decoration: none;
  border: 1px solid rgba(220, 227, 238, 0.24);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  color: var(--acid);
  border-color: var(--acid);
  background: rgba(200, 255, 61, 0.08);
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--orange-300) 46%, rgba(200, 255, 61, 0.72) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 clamp(32px, 4.4vw, 50px) 32px;
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 16px;
  height: 16px;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 64%, 64% 100%, 0 100%);
}

.page-about .about-tl__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(36px, 5.4vw, 60px);
  line-height: 0.92;
  letter-spacing: -0.055em;
  color: var(--orange);
  transition: color 0.24s var(--ease);
}

.page-about .about-tl__item:target .about-tl__year {
  color: var(--acid);
}

.page-about .about-tl__phase {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--blue-900);
  background: var(--mist);
}

.page-about .about-tl__body h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.1vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-tl__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(244, 246, 250, 0.76);
}

@media (min-width: 860px) {
  .page-about .about-tl__item {
    display: grid;
    grid-template-columns: 142px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
    padding-left: 42px;
  }

  .page-about .about-tl__item::before {
    top: 14px;
  }

  .page-about .about-tl__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 0;
  }
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: start;
  }
}

.page-about .about-split__main > p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: #26364d;
}

/* ---------- 流程清单 ---------- */
.page-about .about-steps {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-about .about-steps li {
  position: relative;
  counter-increment: step;
  padding: 15px 0 15px 46px;
  border-top: 1px solid var(--line);
}

.page-about .about-steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-steps strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--blue-900);
}

.page-about .about-steps span {
  display: block;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 图片 ---------- */
.page-about .about-fig {
  margin: 0;
}

.page-about .about-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: 11px 11px 0 0 rgba(255, 90, 31, 0.16);
}

.page-about .about-fig__cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-fig--wide {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-fig--wide img {
  box-shadow: 11px 11px 0 0 rgba(8, 21, 43, 0.12);
}

/* ---------- 合作方式 ---------- */
.page-about .about-ways {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

@media (min-width: 720px) {
  .page-about .about-ways {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-way {
  padding: 20px 20px 22px;
  background: rgba(255, 255, 255, 0.76);
  border-left: 3px solid var(--orange);
}

.page-about .about-way h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--blue-900);
}

.page-about .about-way p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #2d3d55;
}

.page-about .about-ways__note {
  margin-top: clamp(18px, 2.4vw, 24px);
  font-size: 15px;
  line-height: 1.8;
  color: #3b4a61;
  border-left: 2px solid rgba(8, 21, 43, 0.18);
  padding-left: 14px;
  max-width: 62ch;
}

/* ---------- 盘点数字 ---------- */
.page-about .about-figures {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 56px);
  margin: clamp(22px, 3vw, 32px) 0 clamp(20px, 2.6vw, 26px);
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-figures__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-figures__n {
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.6vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--blue-900);
}

.page-about .about-figures__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-end {
  padding-bottom: clamp(48px, 7vw, 84px);
}

.page-about .about-cta {
  margin-top: clamp(26px, 3.6vw, 40px);
  padding: clamp(22px, 3vw, 32px);
  background: linear-gradient(120deg, rgba(255, 90, 31, 0.16) 0%, rgba(200, 255, 61, 0.08) 100%);
  border: 1px solid rgba(220, 227, 238, 0.18);
}

.page-about .about-cta__lead {
  margin: 0 0 clamp(16px, 2.2vw, 22px);
  font-size: clamp(15.5px, 1.8vw, 17.5px);
  line-height: 1.75;
  color: var(--paper);
  max-width: 46ch;
}

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

.page-about .about-wide {
  margin: clamp(36px, 5vw, 64px) 0 0;
}

.page-about .about-wide img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 599px) {
  .page-about .about-cta__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .page-about .about-tl__body p,
  .page-about .about-sec__body > p {
    font-size: 15.5px;
  }

  .page-about .about-fig img,
  .page-about .about-fig--wide img {
    box-shadow: 6px 6px 0 0 rgba(255, 90, 31, 0.16);
  }
}
<<<END>>>