.page-about {
  --about-stripe: linear-gradient(90deg, var(--flag-blue) 0 20%, var(--white) 20% 40%, var(--flag-red) 40% 60%, var(--flag-green) 60% 80%, var(--flag-yellow) 80% 100%);
  background: var(--snow);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 44px) 0 64px;
  background: var(--night);
  color: var(--snow);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -3;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .48;
}

.page-about .about-hero__shard {
  position: absolute;
  top: -24%;
  right: -14%;
  z-index: -2;
  width: 64%;
  height: 150%;
  transform: rotate(14deg);
  background: linear-gradient(160deg, rgba(77, 163, 255, .3), rgba(46, 107, 255, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 90% at 86% 6%, rgba(255, 90, 54, .22), transparent 58%),
    linear-gradient(180deg, rgba(6, 13, 31, .58) 0%, rgba(11, 27, 58, .84) 56%, var(--night) 100%);
  pointer-events: none;
}

.page-about .about-hero__band {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: var(--about-stripe);
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-hero .breadcrumb {
  margin: 0 0 24px;
  color: rgba(247, 250, 255, .6);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-about .about-hero .breadcrumb a {
  color: rgba(247, 250, 255, .88);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--orange);
}

.page-about .about-hero .eyebrow {
  margin: 0 0 14px;
  color: var(--orange);
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  max-width: 17ch;
  font-size: clamp(30px, 5.6vw, 64px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
}

.page-about .about-hero__lede {
  margin: 0 0 28px;
  max-width: 56ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.8;
  color: rgba(247, 250, 255, .84);
}

.page-about .about-hero__jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(77, 163, 255, .5);
  color: var(--ice);
  font-size: 13px;
  letter-spacing: .08em;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-hero__jump:hover,
.page-about .about-hero__jump:focus-visible {
  color: var(--snow);
  border-bottom-color: var(--orange);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: 34px;
  padding-top: clamp(34px, 5vw, 64px);
  padding-bottom: clamp(42px, 6vw, 84px);
}

.page-about .about-rail {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink-soft);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--ink);
  border-color: var(--ice);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ice);
}

.page-about .about-flow {
  display: grid;
  gap: clamp(48px, 7vw, 86px);
  min-width: 0;
}

.page-about .about-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
  min-width: 0;
}

.page-about .about-sec__head {
  margin-bottom: 24px;
}

.page-about .about-sec__head h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-sec__head p {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-kicker {
  display: block;
  width: 46px;
  height: 4px;
  margin-bottom: 16px;
  border-radius: 2px;
  background: var(--flag-blue);
}

.page-about .about-kicker--orange { background: var(--orange); }
.page-about .about-kicker--green { background: var(--flag-green); }
.page-about .about-kicker--yellow { background: var(--flag-yellow); }
.page-about .about-kicker--red { background: var(--flag-red); }

.page-about .about-lead {
  margin: 0 0 22px;
  max-width: 46ch;
  font-size: clamp(17px, 2.1vw, 22px);
  font-weight: 500;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-cols {
  display: grid;
  gap: 0;
}

.page-about .about-cols p,
.page-about .about-text {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-callout {
  margin-top: 26px;
  padding: 20px 22px;
  border-left: 4px solid var(--orange);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: linear-gradient(90deg, rgba(255, 90, 54, .1), rgba(255, 90, 54, 0));
}

.page-about .about-callout .label {
  margin: 0 0 8px;
  color: var(--orange);
}

.page-about .about-callout p:last-child {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 图片基座 ---------- */
.page-about .about-figure {
  margin: 0 0 30px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--night-2);
  box-shadow: var(--shadow-1);
}

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

.page-about .about-figure--team {
  margin-bottom: 26px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--flag-blue), var(--flag-green) 46%, var(--orange));
  opacity: .55;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px 34px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border: 3px solid var(--flag-blue);
  border-radius: 50%;
  background: var(--white);
}

.page-about .about-timeline__item:nth-child(2)::before { border-color: var(--flag-red); }
.page-about .about-timeline__item:nth-child(3)::before { border-color: var(--flag-green); }
.page-about .about-timeline__item:nth-child(4)::before { border-color: var(--flag-yellow); }

.page-about .about-timeline__year {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--night);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
}

.page-about .about-timeline__item h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-timeline__item p:last-child {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.page-about .about-stat {
  padding-left: 18px;
  border-left: 3px solid var(--flag-green);
}

.page-about .about-stat:nth-child(1) { border-left-color: var(--flag-blue); }
.page-about .about-stat:nth-child(3) { border-left-color: var(--flag-yellow); }

.page-about .about-stat__num {
  display: block;
  margin: 0;
  font-size: clamp(34px, 4.4vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .about-stat__unit {
  margin: 8px 0 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .about-stat__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 深色主题带 ---------- */
.page-about .about-band {
  position: relative;
  overflow: hidden;
  padding: clamp(46px, 7vw, 86px) 0;
  background: var(--night);
  color: var(--snow);
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(77, 163, 255, .2), transparent 62%),
    radial-gradient(70% 100% at 0% 100%, rgba(255, 90, 54, .16), transparent 58%);
  pointer-events: none;
}

.page-about .about-band__inner {
  position: relative;
}

.page-about .about-sec__head--dark h2 {
  color: var(--snow);
}

.page-about .about-sec__head--dark p {
  color: rgba(247, 250, 255, .76);
}

.page-about .about-eco {
  display: grid;
  gap: 26px;
}

.page-about .about-eco .label {
  margin: 0 0 14px;
  color: var(--ice);
}

.page-about .about-eco__card {
  padding: 24px 22px;
}

.page-about .about-eco__dl {
  margin: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-eco__dl dt {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--snow);
}

.page-about .about-eco__dl dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(247, 250, 255, .78);
}

.page-about .about-eco__dl .stat-mono {
  font-size: 19px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-eco__honors ul {
  display: grid;
  gap: 13px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__honors li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(247, 250, 255, .84);
}

.page-about .about-eco__honors li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .52em;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  transform: rotate(45deg);
  background: var(--flag-blue);
}

.page-about .about-eco__honors li:nth-child(2)::before { background: var(--flag-red); }
.page-about .about-eco__honors li:nth-child(3)::before { background: var(--flag-green); }
.page-about .about-eco__honors li:nth-child(4)::before { background: var(--flag-yellow); }

/* ---------- 覆盖与规模 ---------- */
.page-about .about-metrics {
  display: grid;
  gap: 20px 24px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-about .about-metrics__item {
  padding-left: 16px;
  border-left: 3px solid var(--mist);
}

.page-about .about-metrics__item:nth-child(1) { border-left-color: var(--flag-blue); }
.page-about .about-metrics__item:nth-child(2) { border-left-color: var(--orange); }
.page-about .about-metrics__item:nth-child(3) { border-left-color: var(--flag-red); }
.page-about .about-metrics__item:nth-child(4) { border-left-color: var(--flag-green); }
.page-about .about-metrics__item:nth-child(5) { border-left-color: var(--flag-yellow); }
.page-about .about-metrics__item:nth-child(6) { border-left-color: var(--ice); }

.page-about .about-metrics__num {
  margin: 0 0 6px;
  font-size: clamp(30px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .about-metrics__unit {
  margin-left: 4px;
  font-size: .46em;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-metrics__label {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  position: relative;
  padding: clamp(44px, 6vw, 74px) 0;
  background: var(--white);
  border-top: 1px solid var(--line);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--about-stripe);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-cta__copy .eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
}

.page-about .about-cta__copy h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 34px;
  }

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

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 860px) {
  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 34px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
    column-gap: 56px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    border-top: 0;
    border-left: 2px solid var(--line);
    padding-top: 0;
    padding-left: 16px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-rail__list a {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: var(--radius-sm);
    background: transparent;
    padding: 9px 10px;
    white-space: normal;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    background: rgba(77, 163, 255, .1);
    border-left-color: var(--orange);
  }

  .page-about .about-hero {
    padding: calc(var(--header-h) + 76px) 0 96px;
  }
}
<<<END>>>