.page-about {
  --about-gold-line: rgba(245, 197, 66, .36);
  --about-violet-line: rgba(122, 77, 255, .46);
  --about-cyan-line: rgba(53, 242, 226, .42);
  --about-soft: rgba(16, 30, 69, .74);
  background: var(--jy-abyss);
  color: var(--jy-white);
  overflow-x: hidden;
}

/* ---------- 通用小标题组 ---------- */
.page-about .about-head {
  max-width: 660px;
  margin-bottom: clamp(24px, 4vw, 42px);
}
.page-about .about-h2 {
  margin: 10px 0 0;
  font-size: clamp(25px, 3.9vw, 38px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.01em;
}
.page-about .about-head__sub {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--jy-silver);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.4vw, 34px) 0 clamp(46px, 7vw, 86px);
  background:
    radial-gradient(115% 85% at 10% -12%, rgba(122, 77, 255, .34), transparent 62%),
    radial-gradient(76% 66% at 96% 4%, rgba(53, 242, 226, .13), transparent 58%),
    linear-gradient(180deg, var(--jy-abyss) 0%, var(--jy-deep) 100%);
}
.page-about .about-hero__split {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  margin-top: clamp(24px, 4vw, 46px);
}
.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(29px, 5.4vw, 54px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -.02em;
  word-break: break-word;
}
.page-about .about-hl {
  color: var(--jy-gold-bright);
}
.page-about .about-hero__deck {
  margin: 20px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.8;
  color: var(--jy-silver);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-hero__cards {
  display: grid;
  gap: 12px;
}
.page-about .about-kpi {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: linear-gradient(145deg, rgba(16, 30, 69, .94), rgba(11, 21, 51, .66));
  border: 2px solid var(--about-gold-line);
  clip-path: var(--jy-cut);
}
.page-about .about-kpi__num {
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--jy-gold-bright);
  white-space: nowrap;
}
.page-about .about-kpi__unit {
  margin-left: 2px;
  font-family: var(--jy-font-zh);
  font-size: .48em;
  color: var(--jy-gold);
}
.page-about .about-kpi__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--jy-silver);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--jy-deep) 0%, var(--jy-abyss) 100%);
}
.page-about .about-timeline__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 36px);
}
.page-about .about-scale {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 22px;
  display: grid;
  gap: 24px;
}
.page-about .about-scale::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--jy-gold) 0%, var(--jy-violet) 58%, rgba(38, 52, 92, 0) 100%);
}
.page-about .about-scale__item {
  position: relative;
  display: grid;
  gap: 4px;
}
.page-about .about-scale__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 5px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--jy-gold);
  background: var(--jy-abyss);
  transform: rotate(45deg);
}
.page-about .about-scale__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--jy-white);
}
.page-about .about-scale__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--jy-silver);
}
.page-about .about-timeline__body {
  display: grid;
  gap: 18px;
}
.page-about .about-timeline__media {
  margin: 0 0 4px;
}
.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.84;
  color: var(--jy-silver);
}
.page-about .about-callout {
  border-left: 3px solid var(--jy-gold);
  background: rgba(16, 30, 69, .7);
  padding: 14px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--jy-white);
}

/* ---------- 团队 ---------- */
.page-about .about-team__cards {
  display: grid;
  gap: 16px;
}
.page-about .team-card {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 26px 20px 20px;
  background: var(--jy-panel);
  border: 2px solid var(--jy-line);
  clip-path: var(--jy-cut);
  transition: transform .25s var(--jy-ease), border-color .25s var(--jy-ease), background .25s var(--jy-ease);
}
.page-about .team-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  background: var(--team-accent, var(--jy-gold));
}
.page-about .team-card--content { --team-accent: var(--jy-gold); }
.page-about .team-card--tech { --team-accent: var(--jy-violet); }
.page-about .team-card--service { --team-accent: var(--jy-cyan); }
.page-about .team-card:hover,
.page-about .team-card:focus {
  transform: translateY(-3px);
  border-color: var(--team-accent, var(--jy-gold));
  outline: none;
}
.page-about .team-card:focus-visible {
  outline: 2px solid var(--jy-cyan);
  outline-offset: 3px;
}
.page-about .team-card__role {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--jy-silver);
  text-transform: uppercase;
}
.page-about .team-card__num {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--jy-white);
}
.page-about .team-card__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--jy-silver);
}
.page-about .team-card__more {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--jy-gold-bright);
  border-top: 1px dashed rgba(38, 52, 92, .9);
  transition: max-height .3s var(--jy-ease), opacity .3s var(--jy-ease), padding .3s var(--jy-ease);
}
.page-about .team-card:hover .team-card__more,
.page-about .team-card:focus .team-card__more {
  max-height: 200px;
  opacity: 1;
  padding-top: 10px;
}
.page-about .about-team__foot {
  display: grid;
  gap: 22px;
  align-items: center;
  margin-top: clamp(24px, 3.4vw, 34px);
}
.page-about .about-team__media {
  margin: 0;
}
.page-about .about-team__note p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jy-silver);
}
.page-about .about-team__note p:last-child {
  margin-bottom: 0;
}
.page-about .about-team__note a {
  color: var(--jy-gold-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--about-gold-line);
}
.page-about .about-team__note a:hover {
  border-bottom-color: var(--jy-cyan);
}

/* ---------- 四道关 ---------- */
.page-about .about-flow {
  background: linear-gradient(180deg, var(--jy-abyss) 0%, var(--jy-deep) 55%, var(--jy-abyss) 100%);
}
.page-about .about-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-step {
  position: relative;
  padding: 60px 20px 22px;
  background: linear-gradient(180deg, rgba(16, 30, 69, .92), rgba(11, 21, 51, .6));
  border: 2px solid var(--jy-line);
  clip-path: var(--jy-cut);
  transition: transform .25s var(--jy-ease), border-color .25s var(--jy-ease);
}
.page-about .about-step:hover {
  transform: translateY(-3px);
  border-color: var(--about-gold-line);
}
.page-about .about-step__no {
  position: absolute;
  top: 16px;
  left: 20px;
  padding: 3px 9px;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--jy-gold);
  border: 1px solid var(--about-gold-line);
  background: rgba(6, 9, 22, .55);
}
.page-about .about-step__title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--jy-white);
}
.page-about .about-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--jy-silver);
}
.page-about .about-flow__note {
  margin: 18px 0 0;
  padding: 14px 18px;
  border: 2px dashed var(--jy-line);
  background: rgba(6, 9, 22, .55);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--jy-white);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  gap: 24px;
  align-items: start;
}
.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-node {
  display: grid;
  padding: 13px 16px;
  border: 2px solid var(--jy-line);
  background: var(--about-soft);
  cursor: default;
  transition: border-color .25s var(--jy-ease), background .25s var(--jy-ease);
}
.page-about .about-node:hover,
.page-about .about-node:focus {
  border-color: var(--about-cyan-line);
  background: rgba(16, 30, 69, .96);
  outline: none;
}
.page-about .about-node:focus-visible {
  outline: 2px solid var(--jy-cyan);
  outline-offset: 2px;
}
.page-about .about-node__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--jy-white);
  letter-spacing: .01em;
}
.page-about .about-node__tip {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  font-size: 13.5px;
  line-height: 1.66;
  color: var(--jy-silver);
  transition: max-height .28s var(--jy-ease), opacity .28s var(--jy-ease), margin .28s var(--jy-ease);
}
.page-about .about-node:hover .about-node__tip,
.page-about .about-node:focus .about-node__tip {
  max-height: 130px;
  opacity: 1;
  margin-top: 7px;
}
.page-about .about-eco__media {
  margin: 0;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach__panel {
  padding: clamp(22px, 3.6vw, 42px);
  border: 2px solid var(--about-gold-line);
  background: linear-gradient(150deg, rgba(16, 30, 69, .92), rgba(11, 21, 51, .7));
  clip-path: var(--jy-cut);
}
.page-about .about-reach__inner {
  display: grid;
  gap: 24px;
  align-items: center;
}
.page-about .about-reach__text {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--jy-silver);
}
.page-about .about-reach__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.page-about .about-reach__stats li {
  display: grid;
  gap: 6px;
  justify-items: center;
  padding: 16px 8px;
  text-align: center;
  border: 2px solid var(--about-gold-line);
  background: rgba(6, 9, 22, .5);
}
.page-about .about-reach__num {
  font-size: clamp(22px, 2.8vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--jy-gold-bright);
  white-space: nowrap;
}
.page-about .about-reach__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--jy-silver);
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next__grid {
  display: grid;
  gap: 14px;
}
.page-about .about-link {
  position: relative;
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 18px 48px;
  background: var(--jy-panel);
  border: 2px solid var(--jy-line);
  color: inherit;
  text-decoration: none;
  clip-path: var(--jy-cut);
  transition: transform .25s var(--jy-ease), border-color .25s var(--jy-ease), background .25s var(--jy-ease);
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--jy-cyan);
  background: rgba(16, 30, 69, .98);
  outline: none;
}
.page-about .about-link__k {
  font-size: 17px;
  font-weight: 700;
  color: var(--jy-white);
}
.page-about .about-link__d {
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--jy-silver);
}
.page-about .about-link__go {
  position: absolute;
  right: 16px;
  bottom: 14px;
  font-family: var(--jy-font-num);
  font-size: 18px;
  color: var(--jy-gold);
}
.page-about .about-link:hover .about-link__go {
  color: var(--jy-cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-team__foot {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 34px;
  }
  .page-about .about-reach__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 38px;
  }
}

@media (min-width: 900px) {
  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 40px;
  }
  .page-about .about-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__split {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: start;
  }
  .page-about .about-hero__cards {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__grid {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(34px, 4.4vw, 58px);
  }
  .page-about .about-scale {
    position: sticky;
    top: calc(var(--jy-header-h) + 28px);
    align-self: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .page-about .about-reach__stats {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (hover: none) {
  .page-about .team-card__more {
    max-height: 200px;
    opacity: 1;
    padding-top: 10px;
  }
  .page-about .about-node__tip {
    max-height: 130px;
    opacity: 1;
    margin-top: 7px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .team-card__more,
  .page-about .about-node,
  .page-about .about-node__tip,
  .page-about .about-step,
  .page-about .about-link {
    transition: none;
  }
  .page-about .team-card:hover,
  .page-about .team-card:focus,
  .page-about .about-step:hover,
  .page-about .about-link:hover,
  .page-about .about-link:focus-visible {
    transform: none;
  }
}
<<<END>>>