.page-about {
  --about-hair: rgba(201, 211, 224, 0.14);
  --about-cut: polygon(26% 0, 100% 0, 100% 100%, 0 76%);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: calc(var(--header-h) + 48px);
  padding-bottom: 58px;
  background:
    radial-gradient(760px 460px at 84% 12%, rgba(47, 224, 232, 0.15), transparent 66%),
    radial-gradient(640px 520px at 4% 90%, rgba(75, 61, 143, 0.38), transparent 70%),
    linear-gradient(166deg, var(--abyss) 0%, var(--deep) 60%, #08152c 100%);
}

.page-about .about-hero__slice {
  position: absolute;
  top: -10%;
  right: -20%;
  width: 64%;
  height: 128%;
  background: linear-gradient(202deg, rgba(47, 224, 232, 0.18), rgba(75, 61, 143, 0.32) 62%, rgba(255, 138, 61, 0.12));
  clip-path: var(--about-cut);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  opacity: 0.14;
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: 34px;
}

.page-about .about-hero__lede {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-crumb {
  margin-bottom: 2px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-crumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(27px, 6.4vw, 50px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.page-about .about-hero__sub {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.82;
  color: var(--silver);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-right: 24px;
  border-right: 1px solid var(--about-hair);
}

.page-about .about-hero__stats li:last-child {
  padding-right: 0;
  border-right: 0;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-hero__lab {
  font-size: 12px;
  color: var(--mist);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: rgba(14, 124, 134, 0.18);
  box-shadow: 0 26px 64px rgba(4, 10, 24, 0.58);
}

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

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(47, 224, 232, 0.12), transparent 56%);
  pointer-events: none;
}

/* ---------- 起点 ---------- */

.page-about .about-origin__layout {
  display: grid;
  gap: 20px;
}

.page-about .about-origin__head h2 {
  margin: 8px 0 0;
}

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

.page-about .about-origin__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-origin__link,
.page-about .about-eco__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 232, 0.4);
  padding-bottom: 3px;
  align-self: flex-start;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-origin__link:hover,
.page-about .about-origin__link:focus-visible,
.page-about .about-eco__link:hover,
.page-about .about-eco__link:focus-visible {
  color: var(--amber-soft);
  border-color: rgba(255, 138, 61, 0.5);
}

/* ---------- 版本 ---------- */

.page-about .about-versions {
  background: linear-gradient(180deg, rgba(75, 61, 143, 0.26), rgba(75, 61, 143, 0.05));
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-versions__strip {
  margin: 0 0 28px;
  border-radius: var(--radius-m);
  overflow: hidden;
  opacity: 0.82;
}

.page-about .about-versions__strip img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 220px;
  object-fit: cover;
}

.page-about .about-vitem {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-vitem__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  padding: 19px 16px;
  border: 0;
  border-left: 3px solid transparent;
  background: none;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: border-color 0.24s ease, background 0.24s ease;
}

.page-about .about-vitem__trigger:hover,
.page-about .about-vitem__trigger:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(47, 224, 232, 0.06);
}

.page-about .about-vitem__trigger[aria-expanded="true"] {
  border-left-color: var(--amber);
  background: rgba(255, 138, 61, 0.07);
}

.page-about .about-vitem__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-vitem__trigger[aria-expanded="true"] .about-vitem__no {
  color: var(--amber);
}

.page-about .about-vitem__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .about-vitem__sum {
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-vitem__panel {
  padding: 2px 16px 22px;
  font-size: 14px;
  line-height: 1.82;
  color: var(--silver);
}

.page-about .about-vitem__panel[aria-expanded="true"] {
  display: block;
}

.page-about .about-vitem__panel > p {
  margin: 0;
  max-width: 46em;
}

.page-about .about-vitem__panel ul {
  margin: 10px 0 0;
  padding-left: 18px;
  max-width: 46em;
}

.page-about .about-vitem__panel li {
  margin-top: 4px;
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  background: radial-gradient(700px 420px at 88% 2%, rgba(14, 124, 134, 0.24), transparent 68%);
}

.page-about .about-team__figure {
  margin: 0 0 28px;
  border-radius: var(--radius-l);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: cover;
}

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

.page-about .about-team__card {
  position: relative;
  padding: 26px 22px 22px;
  border-radius: var(--radius-m);
  border: 1px solid rgba(47, 224, 232, 0.2);
  background: linear-gradient(160deg, rgba(14, 124, 134, 0.22), rgba(10, 23, 48, 0.74));
  transition: transform 0.28s ease, border-color 0.28s ease, background 0.28s ease;
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(47, 224, 232, 0.52);
  background: linear-gradient(160deg, rgba(14, 124, 134, 0.34), rgba(10, 23, 48, 0.8));
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .about-team__keys {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__keys li {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--about-hair);
  background: rgba(201, 211, 224, 0.1);
  font-size: 12px;
  color: var(--silver);
  opacity: 0.6;
  transition: opacity 0.28s ease, color 0.28s ease, border-color 0.28s ease;
}

.page-about .about-team__card:hover .about-team__keys li,
.page-about .about-team__card:focus-within .about-team__keys li {
  opacity: 1;
  color: var(--cyan);
  border-color: rgba(47, 224, 232, 0.42);
}

/* ---------- 评分 ---------- */

.page-about .about-scoring {
  border-top: 1px solid rgba(255, 138, 61, 0.2);
  background: linear-gradient(180deg, rgba(255, 138, 61, 0.08), transparent 62%);
}

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

.page-about .about-scoring__dims li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-hair);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-scoring__dims .num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-scoring__rules {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-rule {
  padding: 22px;
  border-radius: var(--radius-m);
  border: 1px solid rgba(255, 138, 61, 0.26);
  background: linear-gradient(150deg, rgba(255, 138, 61, 0.16), rgba(10, 23, 48, 0.68));
}

.page-about .about-rule h3 {
  margin: 0 0 8px;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--amber-soft);
}

.page-about .about-rule p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  border-top: 1px solid rgba(122, 46, 74, 0.36);
  background:
    radial-gradient(620px 400px at 8% 18%, rgba(122, 46, 74, 0.3), transparent 66%),
    linear-gradient(180deg, rgba(122, 46, 74, 0.12), transparent 72%);
}

.page-about .about-eco__grid {
  display: grid;
  gap: 30px;
}

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

.page-about .about-eco__copy h2 {
  margin: 0;
}

.page-about .about-eco__copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 36em;
}

.page-about .about-eco__map svg {
  display: block;
  width: 100%;
  height: auto;
  color: var(--silver);
}

.page-about .about-eco__map {
  padding: 22px;
  border-radius: var(--radius-l);
  border: 1px solid rgba(122, 46, 74, 0.42);
  background: rgba(10, 23, 48, 0.6);
}

/* ---------- 规模 ---------- */

.page-about .about-scale {
  border-top: 1px solid var(--line-cyan);
  background: linear-gradient(180deg, #071228 0%, var(--abyss) 100%);
}

.page-about .about-scale__grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--about-hair);
}

.page-about .about-scale__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 22px;
  background: rgba(8, 18, 38, 0.94);
}

.page-about .about-scale__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 7vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-scale__item:nth-child(2n) .about-scale__num {
  color: var(--amber);
}

.page-about .about-scale__lab {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 末尾去向 ---------- */

.page-about .about-cta__card {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 32px 24px;
  border-radius: var(--radius-l);
  border: 1px solid rgba(47, 224, 232, 0.26);
  background:
    radial-gradient(520px 300px at 88% 8%, rgba(255, 138, 61, 0.24), transparent 66%),
    linear-gradient(140deg, rgba(14, 124, 134, 0.32), rgba(10, 23, 48, 0.88));
}

.page-about .about-cta__lead {
  margin: 0;
  font-size: clamp(17px, 3.6vw, 22px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-scoring__dims {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 34px;
  }

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

@media (min-width: 760px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-cta__card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 40px 44px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 72px);
    padding-bottom: 88px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: center;
    gap: 56px;
  }

  .page-about .about-origin__layout {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
    gap: 48px;
  }

  .page-about .about-origin__head {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.88fr);
    align-items: center;
    gap: 52px;
  }

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

  .page-about .about-vitem__trigger {
    padding: 21px 20px;
  }

  .page-about .about-vitem__panel {
    padding: 2px 20px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-team__keys li,
  .page-about .about-vitem__trigger,
  .page-about .about-origin__link,
  .page-about .about-eco__link {
    transition: none;
  }

  .page-about .about-team__card:hover,
  .page-about .about-team__card:focus-within {
    transform: none;
  }
}