.page-about {
  --about-nav-w: 208px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(1.4rem, 4vw, 2.4rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(58% 70% at 88% -10%, rgba(47, 107, 255, .22), transparent 68%),
    radial-gradient(42% 55% at 4% 8%, rgba(57, 245, 200, .10), transparent 70%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    112deg,
    rgba(232, 242, 244, .05) 0 1px,
    transparent 1px 74px
  );
}

.page-about .about-hero > .cv-shell {
  position: relative;
  z-index: 1;
}

.page-about .cv-breadcrumb__current {
  color: var(--cv-steel);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.6rem);
  margin-top: clamp(1.1rem, 3vw, 1.8rem);
}

.page-about .about-hero__title {
  margin: .65rem 0 0;
  font-family: var(--cv-display);
  font-size: clamp(1.9rem, 5.2vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -.04em;
  color: var(--cv-fog);
  text-wrap: balance;
}

.page-about .about-hero__lead .cv-lede {
  margin-top: 1rem;
  max-width: 58ch;
  color: rgba(232, 242, 244, .80);
  line-height: 1.75;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--cv-line-soft);
  border: 1px solid var(--cv-line-soft);
  border-radius: 14px;
  overflow: hidden;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem .9rem 1.1rem;
  background: rgba(18, 40, 58, .72);
}

.page-about .about-fact__num {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cv-mint);
}

.page-about .about-fact__label {
  font-size: .78rem;
  line-height: 1.4;
  letter-spacing: .04em;
  color: var(--cv-steel);
}

.page-about .about-hero__media {
  margin: clamp(1.4rem, 3vw, 2.4rem) 0 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--cv-line-soft);
  background: linear-gradient(160deg, rgba(18, 40, 58, .9), rgba(7, 19, 31, .95));
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 阶段轴 ---------- */
.page-about .about-axis__inner {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.2rem);
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0 0 .5rem;
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-steps__link {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .8rem;
  border-radius: 999px;
  border: 1px solid var(--cv-line-soft);
  text-decoration: none;
  white-space: nowrap;
  color: var(--cv-steel);
  transition: color .25s var(--cv-ease), border-color .25s var(--cv-ease), background-color .25s var(--cv-ease);
}

.page-about .about-steps__num {
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--cv-mint);
}

.page-about .about-steps__label {
  font-size: .85rem;
}

.page-about .about-steps__link:hover,
.page-about .about-steps__link:focus-visible {
  color: var(--cv-fog);
  border-color: var(--cv-mint);
  background: rgba(57, 245, 200, .07);
}

.page-about .about-steps__link[aria-current="true"] {
  color: var(--cv-fog);
  border-color: var(--cv-mint);
  background: rgba(57, 245, 200, .10);
}

.page-about .about-axis__flow {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
}

.page-about .about-stage {
  position: relative;
  padding-left: 1.6rem;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cv-mint);
  box-shadow: 0 0 0 4px rgba(57, 245, 200, .12);
}

.page-about .about-stage::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1.9rem;
  bottom: -.6rem;
  width: 1px;
  background: linear-gradient(180deg, rgba(57, 245, 200, .34), rgba(57, 245, 200, 0));
}

.page-about .about-stage:last-child::after {
  display: none;
}

.page-about .about-stage__num {
  margin: 0;
  font-family: var(--cv-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: rgba(57, 245, 200, .55);
}

.page-about .about-stage__title {
  margin: .5rem 0 .85rem;
  font-family: var(--cv-display);
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  line-height: 1.22;
  letter-spacing: -.025em;
  color: var(--cv-fog);
}

.page-about .about-stage__body p {
  margin: 0 0 .95rem;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(232, 242, 244, .82);
}

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

.page-about .about-stage__media {
  margin: 1.2rem 0 1.4rem;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--cv-line-soft);
  background: linear-gradient(150deg, rgba(18, 40, 58, .85), rgba(14, 21, 27, .92));
}

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

/* ---------- 六项数据 ---------- */
.page-about .about-data-list {
  list-style: none;
  margin: 1.1rem 0 1.3rem;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--cv-line-soft);
  border: 1px solid var(--cv-line-soft);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .about-data-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .1rem .6rem;
  padding: .7rem .9rem;
  background: rgba(18, 40, 58, .72);
}

.page-about .about-data-list .cv-mono {
  font-size: .88rem;
  color: var(--cv-mint);
}

.page-about .about-data-list li span:last-child {
  font-size: .84rem;
  line-height: 1.5;
  color: var(--cv-steel);
}

/* ---------- 两步路径 ---------- */
.page-about .about-steps-inline {
  list-style: none;
  margin: 1.1rem 0 1.3rem;
  padding: 0;
  display: grid;
  gap: .6rem;
}

.page-about .about-steps-inline li {
  display: flex;
  align-items: baseline;
  gap: .65rem;
  padding: .8rem .95rem;
  border: 1px solid var(--cv-line);
  border-radius: 12px;
  background: linear-gradient(140deg, rgba(57, 245, 200, .07), rgba(18, 40, 58, .62));
  font-size: .95rem;
  line-height: 1.6;
  color: rgba(232, 242, 244, .86);
}

.page-about .about-steps-inline .cv-mono {
  flex: none;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--cv-mint);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: 1.2rem 0 .9rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
}

.page-about .about-partner {
  padding: 1.1rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--cv-line-soft);
  background: linear-gradient(160deg, rgba(18, 40, 58, .85), rgba(14, 21, 27, .92));
  transition: border-color .25s var(--cv-ease), transform .25s var(--cv-ease);
}

.page-about .about-partner:hover {
  border-color: var(--cv-line);
  transform: translateY(-3px);
}

.page-about .about-partner__num {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cv-mint);
}

.page-about .about-partner__title {
  margin: .55rem 0 .35rem;
  font-size: 1rem;
  letter-spacing: -.01em;
  color: var(--cv-fog);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: .86rem;
  line-height: 1.65;
  color: var(--cv-steel);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 1.1rem 0 1.3rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
}

.page-about .about-team__item {
  padding: 1rem;
  border-radius: 14px;
  border: 1px solid var(--cv-line-soft);
  background: rgba(18, 40, 58, .55);
}

.page-about .about-team__num {
  display: block;
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cv-mint);
}

.page-about .about-team__role {
  display: block;
  margin-top: .5rem;
  font-size: .95rem;
  color: var(--cv-fog);
}

.page-about .about-team__desc {
  display: block;
  margin-top: .25rem;
  font-size: .82rem;
  line-height: 1.6;
  color: var(--cv-steel);
}

/* ---------- 后续入口 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1.3rem 1.2rem;
  border-radius: 16px;
  border: 1px solid var(--cv-line-soft);
  background: linear-gradient(155deg, rgba(18, 40, 58, .8), rgba(7, 19, 31, .92));
  text-decoration: none;
  transition: border-color .25s var(--cv-ease), transform .25s var(--cv-ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--cv-mint);
  transform: translateY(-3px);
}

.page-about .about-next__num {
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--cv-mint);
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--cv-display);
  font-size: 1.15rem;
  letter-spacing: -.02em;
  color: var(--cv-fog);
}

.page-about .about-next__text {
  margin: 0;
  font-size: .88rem;
  line-height: 1.68;
  color: var(--cv-steel);
}

.page-about .about-next__go {
  margin-top: .6rem;
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--cv-flare);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stage {
    padding-left: 2.4rem;
  }

  .page-about .about-stage::after {
    top: 2.1rem;
  }

  .page-about .about-data-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-about .about-axis__inner {
    grid-template-columns: var(--about-nav-w) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
  }

  .page-about .about-axis__nav {
    position: sticky;
    top: 6rem;
  }

  .page-about .about-steps {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--cv-line-soft);
  }

  .page-about .about-steps__link {
    margin-left: -1px;
    padding: .6rem 0 .6rem .9rem;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    line-height: 1.4;
  }

  .page-about .about-steps__link:hover,
  .page-about .about-steps__link:focus-visible {
    background: rgba(57, 245, 200, .05);
  }

  .page-about .about-steps__link[aria-current="true"] {
    border-left-color: var(--cv-mint);
    background: rgba(57, 245, 200, .06);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-steps__link,
  .page-about .about-partner,
  .page-about .about-next__card {
    transition: none;
  }

  .page-about .about-partner:hover,
  .page-about .about-next__card:hover,
  .page-about .about-next__card:focus-visible {
    transform: none;
  }
}