.page-about {
  --ab-axis: rgba(52, 245, 197, 0.24);
  --ab-rule: rgba(20, 64, 58, 0.9);
  --ab-glow: rgba(52, 245, 197, 0.16);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(84px, 16vh, 156px) 0 clamp(38px, 6vw, 68px);
  background:
    radial-gradient(940px 500px at 84% 6%, rgba(52, 245, 197, 0.15), transparent 62%),
    radial-gradient(680px 400px at 2% 96%, rgba(156, 140, 255, 0.13), transparent 66%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 70%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(20, 64, 58, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 64, 58, 0.28) 1px, transparent 1px);
  background-size: 86px 86px;
  -webkit-mask-image: radial-gradient(120% 88% at 74% 8%, #000 0%, transparent 76%);
  mask-image: radial-gradient(120% 88% at 74% 8%, #000 0%, transparent 76%);
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 54px);
  margin-top: clamp(26px, 5vw, 46px);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  text-wrap: balance;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--cyan);
  position: relative;
  display: inline-block;
}

.page-about .about-hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.08em;
  height: 0.09em;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--cyan), rgba(52, 245, 197, 0.15));
}

.page-about .about-hero__lead {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(234, 246, 241, 0.82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 22px);
  margin: 0;
  padding: clamp(18px, 3vw, 24px);
  border: 1px solid var(--ridge);
  border-radius: var(--r-xl);
  background: linear-gradient(160deg, rgba(11, 30, 25, 0.92), rgba(6, 18, 15, 0.72));
}

.page-about .about-hero__stat dt {
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--ash);
  letter-spacing: 0.02em;
}

.page-about .about-hero__stat dd {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stat dd span {
  font-family: var(--font-body);
  font-size: 0.5em;
  font-weight: 500;
  color: var(--cyan);
  margin-left: 3px;
}

.page-about .about-scale {
  list-style: none;
  margin: clamp(36px, 6vw, 62px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--ridge);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 30px);
}

.page-about .about-scale__value {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.2vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-scale__unit {
  font-family: var(--font-body);
  font-size: 0.42em;
  font-weight: 600;
  color: var(--cyan-soft);
  margin-left: 3px;
}

.page-about .about-scale__label {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-small);
  line-height: 1.6;
  color: var(--ash);
}

/* ---------- 出发点 ---------- */
.page-about .about-creed__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-creed__main .section-title {
  margin-top: 12px;
}

.page-about .about-creed__main p {
  max-width: 34em;
  margin: 18px 0 0;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(234, 246, 241, 0.82);
}

.page-about .about-creed__aside {
  align-self: start;
  padding: clamp(22px, 3vw, 28px);
  border: 1px solid var(--ridge);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--panel), rgba(6, 18, 15, 0.6));
}

.page-about .about-creed__aside-title {
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-creed__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-creed__list li {
  display: grid;
  gap: 6px;
  padding: 15px 17px;
  border: 1px solid var(--ridge);
  border-radius: var(--r-md);
  background: var(--ink);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-creed__list li:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-creed__list a {
  color: var(--chalk);
  font-weight: 700;
  text-decoration: none;
  font-size: 1rem;
}

.page-about .about-creed__list a:hover {
  color: var(--cyan);
}

.page-about .about-creed__list span {
  font-size: var(--fs-small);
  line-height: 1.6;
  color: var(--ash);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 38px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-team__groups {
  display: grid;
  gap: 14px;
}

.page-about .about-team__card .card-title {
  margin-top: 8px;
}

.page-about .about-team__card .card-text {
  margin-top: 10px;
}

.page-about .about-team__card:nth-child(2) {
  border-left: 2px solid rgba(255, 176, 32, 0.55);
}

.page-about .about-team__card:nth-child(4) {
  border-left: 2px solid rgba(156, 140, 255, 0.5);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
}

/* ---------- 发展历程 ---------- */
.page-about .about-track .section-head {
  margin-bottom: clamp(30px, 5vw, 48px);
}

.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 36px;
  display: grid;
  gap: clamp(24px, 3.4vw, 36px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(52, 245, 197, 0.4) 18%, var(--ridge) 46%, var(--ridge) 100%);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px var(--ab-glow);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 7px var(--ab-glow);
}

.page-about .about-timeline__stamp {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-timeline__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h3);
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-timeline__text {
  margin: 10px 0 0;
  max-width: 32em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(234, 246, 241, 0.76);
}

.page-about .about-track__figure {
  margin: clamp(30px, 5vw, 48px) 0 0;
}

/* ---------- 工作流 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .about-flow__step {
  position: relative;
  padding: 40px 20px 26px;
  border-top: 1px dashed var(--ab-rule);
  transition: background 0.25s var(--ease);
}

.page-about .about-flow__step:last-child {
  border-bottom: 1px dashed var(--ab-rule);
}

.page-about .about-flow__step:hover {
  background: linear-gradient(180deg, rgba(52, 245, 197, 0.06), transparent 70%);
}

.page-about .about-flow__num {
  position: absolute;
  top: -19px;
  left: 20px;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--ridge);
  color: var(--cyan);
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-flow__step:hover .about-flow__num {
  border-color: var(--cyan);
  color: var(--amber);
}

.page-about .about-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h3);
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-flow__text {
  margin: 10px 0 0;
  font-size: var(--fs-small);
  line-height: 1.72;
  color: var(--ash);
}

.page-about .about-workflow__figure {
  margin: clamp(28px, 4vw, 42px) 0 0;
}

/* ---------- 协作生态 ---------- */
.page-about .about-partners__inner {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-partners__copy .section-title {
  margin-top: 12px;
}

.page-about .about-partners__copy p {
  max-width: 34em;
  margin: 18px 0 0;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(234, 246, 241, 0.8);
}

.page-about .about-partners__copy .link-more {
  display: inline-block;
  margin-top: 22px;
}

.page-about .about-partners__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-partners__card {
  border-top: 2px solid rgba(52, 245, 197, 0.35);
}

.page-about .about-partners__card .card-text {
  margin-top: 10px;
}

/* ---------- 联系条 ---------- */
.page-about .about-cta__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(26px, 4vw, 40px);
  border: 1px solid var(--ridge);
  border-radius: var(--r-xl);
  background:
    radial-gradient(620px 260px at 92% 10%, rgba(52, 245, 197, 0.14), transparent 68%),
    linear-gradient(140deg, var(--panel), rgba(6, 18, 15, 0.86));
}

.page-about .about-cta__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h2);
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(234, 246, 241, 0.78);
}

.page-about .about-cta__btn {
  flex: 0 0 auto;
}

.page-about .about-cta__paths {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-cta__path {
  display: grid;
  gap: 8px;
  padding: 20px 22px;
  border: 1px solid var(--ridge);
  border-radius: var(--r-lg);
  background: var(--panel);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-cta__path:hover {
  border-color: var(--cyan);
  background: linear-gradient(160deg, rgba(52, 245, 197, 0.08), var(--panel) 60%);
  transform: translateY(-2px);
}

.page-about .about-cta__path-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-cta__path-text {
  font-size: var(--fs-small);
  line-height: 1.7;
  color: rgba(234, 246, 241, 0.78);
}

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.6fr);
    align-items: end;
  }

  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-creed__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: calc(var(--header-offset) + 16px);
  }

  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-flow__step {
    border-bottom: 1px dashed var(--ab-rule);
    padding: 40px 18px 30px;
  }

  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: center;
  }

  .page-about .about-cta__bar {
    flex-wrap: nowrap;
  }
}

@media (max-width: 480px) {
  .page-about .about-hero__stats {
    grid-template-columns: 1fr;
  }

  .page-about .about-scale {
    grid-template-columns: 1fr;
  }

  .page-about .about-timeline {
    padding-left: 30px;
  }

  .page-about .about-timeline__item::before {
    left: -30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-creed__list li,
  .page-about .about-cta__path,
  .page-about .about-team__figure {
    transition: none;
    transform: none;
    position: static;
  }
}