.page-about {
  --about-rail-w: 118px;
  --about-card: linear-gradient(158deg, rgba(11, 39, 64, 0.95), rgba(5, 25, 43, 0.62));

  background:
    radial-gradient(1100px 620px at 84% -12%, rgba(53, 241, 196, 0.1), transparent 62%),
    radial-gradient(900px 560px at 4% 6%, rgba(124, 92, 255, 0.13), transparent 64%),
    var(--ly-abyss);
  color: var(--ly-text);
  overflow-x: clip;
}

.page-about .ly-num,
.page-about .ly-mono {
  font-family: var(--ly-font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  max-width: var(--ly-wrap);
  margin: 0 auto;
  padding: 24px 20px 0;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: var(--ly-wrap);
  margin: 0 auto;
  padding: 34px 20px 56px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--ly-font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.6vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--ly-white);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 58ch;
  font-family: var(--ly-font-ui);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--ly-text-soft);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.page-about .about-fact {
  padding: 16px 16px 15px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-md);
  background: var(--about-card);
}

.page-about .about-fact dt {
  font-family: var(--ly-font-ui);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ly-mist);
}

.page-about .about-fact dd {
  margin: 9px 0 0;
  font-family: var(--ly-font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--ly-white);
}

.page-about .about-fact dd small {
  margin-left: 4px;
  font-size: 0.42em;
  font-weight: 500;
  color: var(--ly-cyan);
}

.page-about .about-fact--coral dd {
  color: var(--ly-coral);
}

.page-about .about-fact--cyan dd {
  color: var(--ly-cyan);
}

/* ---------- 长卷布局 ---------- */
.page-about .about-roll {
  max-width: var(--ly-wrap);
  margin: 0 auto;
  padding: 0 20px 72px;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-chapter {
  padding: 52px 0 10px;
  scroll-margin-top: calc(var(--ly-header-h) + 24px);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 26px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ly-line);
}

.page-about .about-chapter__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ly-coral);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--ly-font-display);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ly-white);
}

.page-about .about-link {
  color: var(--ly-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 241, 196, 0.4);
  transition: color 200ms var(--ly-ease), border-color 200ms var(--ly-ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--ly-coral);
  border-color: var(--ly-coral);
}

/* ---------- 01 主张 ---------- */
.page-about .about-pull {
  margin: 0 0 34px;
  padding: 26px 22px 26px 24px;
  border-left: 3px solid var(--ly-coral);
  border-radius: 0 var(--ly-radius-lg) var(--ly-radius-lg) 0;
  background: linear-gradient(120deg, rgba(11, 39, 64, 0.9), rgba(5, 25, 43, 0.4));
}

.page-about .about-pull__quote {
  margin: 0;
}

.page-about .about-pull__quote p {
  margin: 0;
  font-family: var(--ly-font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 30px);
  line-height: 1.6;
  color: var(--ly-white);
}

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

.page-about .about-phase {
  padding: 20px 20px 22px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-md);
  background: rgba(11, 39, 64, 0.5);
}

.page-about .about-phase__tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--ly-radius-pill);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ly-abyss);
  background: var(--ly-cyan);
}

.page-about .about-phase h3 {
  margin: 14px 0 8px;
  font-family: var(--ly-font-ui);
  font-weight: 600;
  font-size: 18px;
  color: var(--ly-white);
}

.page-about .about-phase p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ly-text-soft);
}

/* ---------- 02 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  gap: 24px;
  margin-bottom: 34px;
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media img {
  width: 100%;
  height: auto;
  border-radius: var(--ly-radius-lg);
  object-fit: cover;
  filter: saturate(0.94) contrast(1.06);
}

.page-about .about-team__media .ly-media__cap {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ly-mist);
}

.page-about .about-team__text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ly-text);
}

.page-about .about-team__text p:last-child {
  margin-bottom: 0;
  color: var(--ly-text-soft);
}

.page-about .about-crew {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-crew__item {
  flex: 1 1 220px;
  min-width: 0;
  padding: 18px 18px 18px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-md);
  background: var(--about-card);
  transition: transform 240ms var(--ly-ease), border-color 240ms var(--ly-ease);
}

.page-about .about-crew__item:hover,
.page-about .about-crew__item:focus-within {
  transform: translateY(-2px);
  border-color: rgba(124, 92, 255, 0.7);
}

.page-about .about-crew__bar {
  position: relative;
  height: 4px;
  margin-bottom: 16px;
  border-radius: var(--ly-radius-pill);
  background: var(--ly-line);
  overflow: hidden;
}

.page-about .about-crew__bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--fill, 50%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--ly-violet), var(--ly-cyan));
}

.page-about .about-crew__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-about .about-crew__name {
  margin: 0;
  font-family: var(--ly-font-ui);
  font-weight: 600;
  font-size: 17px;
  color: var(--ly-white);
}

.page-about .about-crew__count {
  font-size: 13px;
  color: var(--ly-yellow);
  white-space: nowrap;
}

.page-about .about-crew__duty {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ly-text-soft);
  transition: max-height 340ms var(--ly-ease), opacity 240ms var(--ly-ease), margin-top 340ms var(--ly-ease);
}

.page-about .about-crew__item:hover .about-crew__duty,
.page-about .about-crew__item:focus-within .about-crew__duty {
  max-height: 260px;
  opacity: 1;
  margin-top: 12px;
}

.page-about .about-crew__item:nth-child(1) { --crew: 3.74; --fill: 100%; }
.page-about .about-crew__item:nth-child(2) { --crew: 3; --fill: 64%; }
.page-about .about-crew__item:nth-child(3) { --crew: 2.24; --fill: 36%; }
.page-about .about-crew__item:nth-child(4) { --crew: 2; --fill: 28%; }

/* ---------- 03 历程 ---------- */
.page-about .about-journey__banner {
  margin: 0 0 30px;
  position: relative;
  border-radius: var(--ly-radius-lg);
  overflow: hidden;
}

.page-about .about-journey__banner img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(0.7) brightness(0.82) contrast(1.1);
}

.page-about .about-journey__banner .ly-media__cap {
  position: absolute;
  left: 18px;
  bottom: 14px;
  right: 18px;
  font-size: 13px;
  color: var(--ly-text-soft);
}

.page-about .about-versions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-version {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-md);
  background: rgba(11, 39, 64, 0.42);
}

.page-about .about-version--now {
  background: linear-gradient(160deg, rgba(124, 92, 255, 0.22), rgba(11, 39, 64, 0.72));
  border-color: rgba(124, 92, 255, 0.55);
}

.page-about .about-version__tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--ly-radius-pill);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ly-abyss);
  background: var(--ly-mist);
}

.page-about .about-version--now .about-version__tag {
  background: var(--ly-cyan);
}

.page-about .about-version h3 {
  margin: 14px 0 8px;
  font-family: var(--ly-font-ui);
  font-weight: 600;
  font-size: 19px;
  color: var(--ly-white);
}

.page-about .about-version p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ly-text-soft);
}

/* ---------- 04 规模 ---------- */
.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  min-height: 118px;
  padding: 18px 16px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-md);
  background: var(--about-card);
}

.page-about .about-stat__num {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--ly-white);
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ly-mist);
}

.page-about .about-stat--coral {
  background: linear-gradient(160deg, rgba(255, 107, 74, 0.22), rgba(5, 25, 43, 0.7));
  border-color: rgba(255, 107, 74, 0.5);
}

.page-about .about-stat--coral .about-stat__num {
  color: var(--ly-coral);
}

.page-about .about-scale__note {
  margin: 0;
  max-width: 74ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ly-text-soft);
}

/* ---------- 05 合作 ---------- */
.page-about .about-partners__layout {
  display: grid;
  gap: 26px;
}

.page-about .about-partners__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.88;
  color: var(--ly-text);
}

.page-about .about-partners__text p:last-of-type {
  color: var(--ly-text-soft);
}

.page-about .about-partners__chips {
  margin: 22px 0 0;
}

.page-about .about-partners__media {
  margin: 0;
}

.page-about .about-partners__media img {
  width: 100%;
  height: auto;
  border-radius: var(--ly-radius-lg);
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

/* ---------- 06 洽谈 ---------- */
.page-about .about-chapter--start {
  padding-bottom: 0;
}

.page-about .about-start {
  display: grid;
  gap: 26px;
  padding: 30px 22px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(53, 241, 196, 0.12), transparent 65%),
    linear-gradient(160deg, rgba(11, 39, 64, 0.95), rgba(5, 25, 43, 0.75));
}

.page-about .about-start__body > p {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.88;
  color: var(--ly-text);
}

.page-about .about-start__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-start__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-start__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 12px 14px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-sm);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ly-text-soft);
  background: rgba(5, 25, 43, 0.45);
}

.page-about .about-start__list li span {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ly-cyan);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1023px) {
  .page-about .about-crew__duty {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (min-width: 720px) {
  .page-about .about-crumb,
  .page-about .about-hero,
  .page-about .about-roll {
    padding-left: 28px;
    padding-right: 28px;
  }

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

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

  .page-about .about-scale__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-stat--a { grid-column: span 6; }
  .page-about .about-stat--b { grid-column: span 6; }
  .page-about .about-stat--c { grid-column: span 5; }
  .page-about .about-stat--d { grid-column: span 7; }
  .page-about .about-stat--e { grid-column: span 7; }
  .page-about .about-stat--f { grid-column: span 5; }

  .page-about .about-start {
    padding: 38px 34px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 48px;
    padding-bottom: 72px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.88fr);
    align-items: end;
    gap: 52px;
  }

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

  .page-about .about-roll {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 46px;
  }

  .page-about .about-rail {
    display: block;
  }

  .page-about .about-rail__list {
    position: sticky;
    top: calc(var(--ly-header-h) + 46px);
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 2px;
  }

  .page-about .about-rail__link {
    display: grid;
    grid-template-columns: 16px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    padding: 9px 8px 9px 0;
    text-decoration: none;
    transition: color 220ms var(--ly-ease);
  }

  .page-about .about-rail__link::before {
    content: "";
    grid-column: 1;
    width: 2px;
    height: 20px;
    border-radius: 2px;
    background: var(--ly-line);
    transition: background 220ms var(--ly-ease), height 220ms var(--ly-ease);
  }

  .page-about .about-rail__num {
    display: none;
  }

  .page-about .about-rail__label {
    font-family: var(--ly-font-ui);
    font-size: 13px;
    letter-spacing: 0.08em;
    color: var(--ly-mist);
    transition: color 220ms var(--ly-ease);
  }

  .page-about .about-rail__link:hover::before,
  .page-about .about-rail__link:focus-visible::before {
    background: var(--ly-coral);
    height: 32px;
  }

  .page-about .about-rail__link:hover .about-rail__label,
  .page-about .about-rail__link:focus-visible .about-rail__label {
    color: var(--ly-white);
  }

  .page-about .about-chapter {
    padding-top: 76px;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 34px;
    align-items: center;
    margin-bottom: 40px;
  }

  .page-about .about-versions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .about-version:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .about-version:nth-child(3) {
    margin-top: 60px;
  }

  .page-about .about-partners__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 38px;
    align-items: center;
  }

  .page-about .about-start {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 40px;
    align-items: start;
    padding: 48px 44px;
  }
}</style>