.page-about {
  --about-line: rgba(61, 245, 212, .18);
  --about-inset: 34px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 48px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(115% 88% at 90% 4%, rgba(15, 123, 108, .30), transparent 62%),
    radial-gradient(85% 70% at 2% 96%, rgba(255, 179, 71, .09), transparent 60%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  margin-top: clamp(20px, 3.4vw, 34px);
}

.page-about .about-hero__copy h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.95rem, 6vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 16em;
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-about .about-hero__sub {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--ink-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__aside {
  display: grid;
  gap: 18px;
}

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

.page-about .stat__label {
  display: block;
  font-size: .74rem;
  letter-spacing: .05em;
  line-height: 1.5;
  color: var(--ink-dim);
}

.page-about .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-hero__stats .stat {
  display: grid;
  gap: 6px;
  padding: 14px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(14, 34, 51, .94), rgba(7, 26, 43, .72));
}

.page-about .about-hero__stats .stat__value {
  font-size: clamp(1.25rem, 3.4vw, 1.95rem);
}

.page-about .about-hero__stats .stat__value--amber {
  color: var(--amber);
}

/* ---------- 时间线 ---------- */
.page-about .about-rail-section {
  border-top: 1px solid var(--line-soft);
}

.page-about .archive-rail {
  list-style: none;
  position: relative;
  margin: clamp(30px, 5vw, 44px) 0 0;
  padding: 0 0 0 var(--about-inset);
  display: grid;
  gap: 32px;
}

.page-about .archive-rail::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(61, 245, 212, .62), rgba(15, 123, 108, .45) 55%, rgba(61, 245, 212, .05));
}

.page-about .archive-rail__item {
  position: relative;
}

.page-about .archive-rail__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-inset) * -1);
  top: 11px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 5px rgba(61, 245, 212, .08);
}

.page-about .archive-rail__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .archive-rail__card {
  position: relative;
  padding: 20px 22px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: linear-gradient(150deg, rgba(14, 34, 51, .95), rgba(7, 26, 43, .72));
  box-shadow: var(--shadow-lift);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-about .archive-rail__card::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 22px;
  height: 22px;
  pointer-events: none;
  border-bottom-right-radius: var(--r-md);
  background: linear-gradient(135deg, transparent 50%, rgba(61, 245, 212, .20) 50%);
}

.page-about .archive-rail__card:hover {
  transform: translateY(-3px);
  border-color: rgba(61, 245, 212, .44);
}

.page-about .archive-rail__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line-amber);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-about .archive-rail__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.08rem;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .archive-rail__text {
  margin: 10px 0 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(14, 34, 51, .48), rgba(7, 26, 43, 0) 70%);
}

.page-about .about-team__grid {
  display: grid;
  gap: 26px;
  margin-top: clamp(28px, 4.4vw, 40px);
}

.page-about .about-team__crew {
  display: grid;
  gap: 16px;
}

.page-about .crew-card {
  position: relative;
  overflow: hidden;
  padding: 22px 22px 20px 26px;
  border-radius: var(--r-md);
  background: var(--paper);
  color: var(--on-paper);
  box-shadow: var(--shadow-lift);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .crew-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--teal), var(--amber));
}

.page-about .crew-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 28px 54px -26px rgba(0, 0, 0, .92);
}

.page-about .crew-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .crew-card__count {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--teal);
}

.page-about .crew-card__unit {
  margin-left: 4px;
  font-size: .42em;
  font-weight: 500;
  letter-spacing: .04em;
  color: rgba(44, 65, 73, .62);
}

.page-about .crew-card__role {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 1.04rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--on-paper);
}

.page-about .crew-card__base {
  margin: 10px 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: rgba(44, 65, 73, .88);
}

.page-about .crew-card__more {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(44, 65, 73, .3);
  font-size: .86rem;
  line-height: 1.72;
  color: rgba(44, 65, 73, .68);
}

.page-about .about-team__media {
  align-self: start;
}

.page-about .about-team__media .media-frame__caption {
  font-size: .74rem;
  color: var(--ink-dim);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  border-top: 1px solid var(--line-soft);
}

.page-about .flow-steps {
  list-style: none;
  margin: clamp(28px, 4.4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 22px 22px 70px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: rgba(14, 34, 51, .58);
  transition: border-color .3s var(--ease);
}

.page-about .flow-step:hover {
  border-color: rgba(61, 245, 212, .4);
}

.page-about .flow-step__idx {
  position: absolute;
  left: 20px;
  top: 20px;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(61, 245, 212, .34);
  background: rgba(15, 123, 108, .24);
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .flow-step__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .flow-step__text {
  margin: 8px 0 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-flow__sla {
  margin-top: 28px;
  padding: 22px 20px;
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  border-radius: var(--r-lg);
  border: 1px solid var(--line-amber);
  background: linear-gradient(140deg, rgba(255, 179, 71, .10), rgba(7, 26, 43, .55));
}

.page-about .about-flow__sla .stat {
  display: grid;
  gap: 7px;
}

.page-about .about-flow__sla .stat__value {
  font-size: clamp(1.45rem, 4vw, 2.1rem);
  color: var(--amber);
}

.page-about .stat__unit {
  margin-left: 5px;
  font-size: .5em;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-partners__desc {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .partner-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-about .partner-list li {
  position: relative;
  padding-left: 22px;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .partner-list strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 资质 ---------- */
.page-about .about-honors {
  border-top: 1px solid var(--line-soft);
}

.page-about .badge-row {
  list-style: none;
  margin: clamp(28px, 4.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .badge {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: linear-gradient(150deg, rgba(15, 123, 108, .22), rgba(14, 34, 51, .88));
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .badge:hover {
  transform: translateY(-2px);
  border-color: rgba(201, 137, 59, .5);
}

.page-about .badge:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-color: rgba(61, 245, 212, .55);
}

.page-about .badge__mark {
  display: grid;
  place-items: center;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 2px solid var(--bronze);
  background: radial-gradient(circle at 34% 28%, rgba(201, 137, 59, .34), rgba(7, 26, 43, .92));
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .badge__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: .98rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .badge__text {
  margin: 7px 0 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 使用场景 ---------- */
.page-about .about-scenes {
  border-top: 1px solid var(--line-soft);
}

.page-about .scene-list {
  margin-top: clamp(26px, 4vw, 36px);
  display: grid;
  gap: 16px;
}

.page-about .scene-item {
  padding: 20px 20px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--cyan);
  background: rgba(14, 34, 51, .55);
  transition: background .3s var(--ease), border-color .3s var(--ease);
}

.page-about .scene-item:nth-child(1) { border-top-color: var(--cyan); }
.page-about .scene-item:nth-child(2) { border-top-color: var(--amber); }
.page-about .scene-item:nth-child(3) { border-top-color: var(--teal); }
.page-about .scene-item:nth-child(4) { border-top-color: var(--electric); }

.page-about .scene-item:hover {
  background: rgba(15, 123, 108, .18);
}

.page-about .scene-item h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: .99rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .scene-item p {
  margin: 10px 0 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 尾部引导 ---------- */
.page-about .about-cta {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cta__panel {
  display: grid;
  gap: 24px;
  padding: clamp(26px, 4.6vw, 44px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(61, 245, 212, .2);
  background: linear-gradient(150deg, rgba(15, 123, 108, .44), rgba(7, 26, 43, .92));
}

.page-about .about-cta__panel h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 3.6vw, 1.95rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-cta__panel p {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

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

/* ---------- 显现 ---------- */
.page-about [data-reveal] {
  animation: about-rise .62s var(--ease) both;
}

.page-about [data-reveal-delay="70"] { animation-delay: 70ms; }
.page-about [data-reveal-delay="80"] { animation-delay: 80ms; }
.page-about [data-reveal-delay="90"] { animation-delay: 90ms; }
.page-about [data-reveal-delay="110"] { animation-delay: 110ms; }
.page-about [data-reveal-delay="120"] { animation-delay: 120ms; }
.page-about [data-reveal-delay="150"] { animation-delay: 150ms; }
.page-about [data-reveal-delay="160"] { animation-delay: 160ms; }
.page-about [data-reveal-delay="200"] { animation-delay: 200ms; }

@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    animation: none;
  }
  .page-about .archive-rail__card,
  .page-about .crew-card,
  .page-about .flow-step,
  .page-about .badge,
  .page-about .scene-item {
    transition: none;
  }
  .page-about .archive-rail__card:hover,
  .page-about .crew-card:hover,
  .page-about .badge:hover {
    transform: none;
  }
}

/* ---------- 中等屏 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    gap: 12px;
  }
  .page-about .about-hero__stats .stat {
    padding: 16px 18px;
  }
  .page-about .flow-step {
    padding: 22px 26px 24px 84px;
  }
  .page-about .flow-step__idx {
    left: 26px;
    top: 22px;
    width: 38px;
    height: 38px;
  }
  .page-about .badge-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .scene-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 团队卡片悬停展开（桌面） ---------- */
@media (min-width: 760px) {
  .page-about .crew-card__more {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    opacity: 0;
    overflow: hidden;
    border-top-color: transparent;
    transition: max-height .35s var(--ease), opacity .28s var(--ease),
                margin-top .35s var(--ease), padding-top .35s var(--ease),
                border-top-color .35s var(--ease);
  }
  .page-about .crew-card:hover .crew-card__more,
  .page-about .crew-card:focus-visible .crew-card__more,
  .page-about .crew-card:focus-within .crew-card__more {
    max-height: 220px;
    margin-top: 12px;
    padding-top: 10px;
    opacity: 1;
    border-top-color: rgba(44, 65, 73, .3);
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 900px) {
  .page-about {
    --about-inset: 46px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
    column-gap: clamp(32px, 5vw, 68px);
  }

  .page-about .archive-rail {
    gap: 36px;
  }

  .page-about .archive-rail__card {
    padding: 24px 28px 26px;
  }

  .page-about .archive-rail__item::before {
    top: 13px;
    width: 13px;
    height: 13px;
  }

  .page-about .flow-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .82fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-team__crew {
    gap: 18px;
  }

  .page-about .about-team__media {
    position: sticky;
    top: 120px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 46px;
    align-items: center;
  }

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
    max-width: 22em;
  }
}

@media (min-width: 1120px) {
  .page-about .about-hero__stats .stat__value {
    font-size: 2.1rem;
  }
  .page-about .scene-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>