.page-about {
  --about-rail: 232px;
  --about-gap: clamp(28px, 5vw, 64px);
  --about-rule: 1px solid rgba(46, 111, 99, .36);
  background:
    radial-gradient(120% 68% at 80% -12%, rgba(19, 242, 200, .10), transparent 62%),
    var(--c-deep);
  color: var(--c-ice);
  padding-bottom: clamp(56px, 9vw, 120px);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(78px, 11vw, 118px) 0 clamp(38px, 6vw, 74px);
  border-bottom: var(--about-rule);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 111, 99, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 111, 99, .10) 1px, transparent 1px);
  background-size: 100% 56px, 56px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 78%);
}

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

.page-about .breadcrumb {
  margin-bottom: clamp(26px, 4.5vw, 52px);
  font-size: .85rem;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
}

.page-about .about-hero__text .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .24em;
  color: var(--c-mint);
  text-transform: uppercase;
}

.page-about .about-hero .display-title {
  margin: 14px 0 0;
  color: var(--c-ice);
  line-height: .96;
  letter-spacing: -.015em;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 54ch;
  color: var(--c-sage);
  font-size: clamp(1rem, 1.15vw, 1.12rem);
  line-height: 1.9;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(28px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 1px;
  background: rgba(46, 111, 99, .34);
  border: var(--about-rule);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px 18px;
  background: var(--c-deep);
}

.page-about .about-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--c-mint);
}

.page-about .about-hero__fact-label {
  font-size: .8rem;
  line-height: 1.5;
  color: var(--c-sage);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  background: var(--c-panel);
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 0 100%);
}

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

.page-about .about-hero__figure::after {
  content: "22.8°N 108.3°E · 夜场灯带";
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--c-mist);
  background: rgba(4, 23, 19, .86);
  opacity: 0;
  transition: opacity .3s var(--ease);
  pointer-events: none;
}

.page-about .about-hero__figure:hover::after,
.page-about .about-hero__figure:focus-within::after {
  opacity: 1;
}

.page-about .media-caption {
  padding: 10px 2px 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--c-sage);
}

/* ---------- 画册式双栏 ---------- */
.page-about .atlas {
  display: grid;
  gap: var(--about-gap);
  padding-top: clamp(40px, 7vw, 78px);
}

.page-about .atlas__rail {
  display: grid;
  align-content: start;
  gap: 14px;
}

.page-about .atlas__rail .coord {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .24em;
  color: var(--c-mint);
  text-transform: uppercase;
}

.page-about .atlas__list {
  list-style: none;
  margin: 0;
  padding: 0 0 12px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  border-bottom: var(--about-rule);
  scrollbar-width: thin;
  scrollbar-color: var(--c-line) transparent;
}

.page-about .atlas__list li {
  flex: 0 0 auto;
}

.page-about .atlas__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 10px;
  white-space: nowrap;
  font-size: .88rem;
  color: var(--c-sage);
  text-decoration: none;
  border-radius: 2px;
  transition: color .2s var(--ease), background .2s var(--ease);
}

.page-about .atlas__list a .mono {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--c-line);
}

.page-about .atlas__list a:hover,
.page-about .atlas__list a:focus-visible {
  color: var(--c-mint);
  background: rgba(19, 242, 200, .08);
}

.page-about .chapter {
  padding: clamp(30px, 5vw, 60px) 0;
  border-top: var(--about-rule);
}

.page-about .chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .chapter__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .chapter__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .24em;
  color: var(--c-mint);
  text-transform: uppercase;
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--c-ice);
}

.page-about .chapter p {
  margin: 0 0 1em;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--c-sage);
}

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

.page-about .chapter a {
  color: var(--c-mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .chapter a:hover,
.page-about .chapter a:focus-visible {
  color: var(--c-mint);
}

.page-about .pull {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 18px 22px;
  max-width: 48ch;
  border-left: 2px solid var(--c-mint);
  background: linear-gradient(90deg, rgba(19, 242, 200, .12), rgba(19, 242, 200, 0) 72%);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.06rem, 1.9vw, 1.34rem);
  line-height: 1.55;
  color: var(--c-ice);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 14px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(216px, 82%);
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--c-line) transparent;
}

.page-about .milestone {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  background: var(--c-panel);
  border-top: 2px solid rgba(46, 111, 99, .6);
  scroll-snap-align: start;
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 38px;
  height: 2px;
  background: var(--c-mint);
}

.page-about .milestone--now::before {
  width: 54px;
  background: var(--c-orange);
}

.page-about .milestone__year {
  font-family: var(--font-mono);
  font-size: 1.34rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-amber);
}

.page-about .milestone--now .milestone__year {
  color: var(--c-orange);
}

.page-about .milestone__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.28;
  color: var(--c-ice);
}

.page-about .milestone p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.76;
  color: var(--c-sage);
}

.page-about .milestone-figure {
  position: relative;
  margin: clamp(24px, 3.5vw, 38px) 0 0;
  background: var(--c-data);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%);
}

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

/* ---------- 团队 ---------- */
.page-about .crew {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(46, 111, 99, .3);
  border: var(--about-rule);
}

.page-about .crew__item {
  display: grid;
  align-content: start;
  gap: 6px;
  padding: 22px 22px 24px;
  background: var(--c-panel);
}

.page-about .crew__num {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 600;
  line-height: 1;
  color: var(--c-mint);
}

.page-about .crew__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .02em;
  color: var(--c-ice);
}

.page-about .crew__item p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--c-sage);
}

/* ---------- 质量流程 ---------- */
.page-about .qc {
  display: grid;
  gap: clamp(26px, 4vw, 42px);
  margin-bottom: clamp(22px, 3vw, 32px);
}

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

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

.page-about .qc__steps li:last-child {
  border-bottom: var(--about-rule);
}

.page-about .qc__step {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--c-mint);
}

.page-about .qc__steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--c-ice);
}

.page-about .qc__steps p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--c-sage);
}

.page-about .qc__figure {
  position: relative;
  margin: 0;
  background: var(--c-data);
  clip-path: polygon(26px 0, 100% 0, 100% 100%, 0 100%, 0 26px);
}

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

/* ---------- 地区连接 ---------- */
.page-about .region {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.5vw, 32px);
  padding: clamp(22px, 3.5vw, 34px);
  background: var(--c-data);
  border: var(--about-rule);
  overflow: hidden;
}

.page-about .region__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 16px;
  position: relative;
  z-index: 1;
}

.page-about .region__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
  border-top: 1px solid rgba(19, 242, 200, .4);
}

.page-about .region__stats .mono {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-amber);
}

.page-about .region__stats span:last-child {
  font-size: .82rem;
  line-height: 1.5;
  color: var(--c-sage);
}

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

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

.page-about .region__mark {
  position: absolute;
  right: -18px;
  bottom: -14px;
  width: min(58%, 340px);
  height: auto;
  opacity: .26;
  pointer-events: none;
}

/* ---------- 服务原则 ---------- */
.page-about .principles {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .principles li {
  position: relative;
  display: grid;
  gap: 7px;
  padding: 20px 22px 22px;
  background: linear-gradient(135deg, rgba(8, 42, 36, .95), rgba(4, 23, 19, .95));
  border-left: 2px solid rgba(46, 111, 99, .8);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .principles li::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 16px 16px 0;
  border-color: transparent rgba(19, 242, 200, .35) transparent transparent;
}

.page-about .principles__mark {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--c-orange);
}

.page-about .principles h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.16rem;
  letter-spacing: .02em;
  color: var(--c-ice);
}

.page-about .principles p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--c-sage);
  max-width: 56ch;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(46px, 7vw, 84px);
  padding: clamp(34px, 6vw, 62px) 0;
  background: linear-gradient(180deg, rgba(8, 42, 36, .9), rgba(4, 23, 19, 0));
  border-top: var(--about-rule);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 14px;
  justify-items: start;
}

.page-about .about-cta .coord {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .24em;
  color: var(--c-mint);
  text-transform: uppercase;
}

.page-about .about-cta h2 {
  margin: 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.2vw, 2.35rem);
  line-height: 1.16;
  color: var(--c-ice);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--c-sage);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .principles li:nth-child(even) {
    transform: translateY(24px);
  }
}

@media (min-width: 860px) {
  .page-about .qc {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .timeline {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-about .atlas {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .atlas__rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .atlas__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0 0 0 14px;
    border-bottom: 0;
    border-left: var(--about-rule);
  }

  .page-about .atlas__list a {
    white-space: normal;
  }

  .page-about .chapter {
    padding: clamp(36px, 4.5vw, 68px) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__figure::after,
  .page-about .atlas__list a {
    transition: none;
  }

  .page-about .principles li:nth-child(even) {
    transform: none;
  }
}
<<<END>>>