.page-about {
  background-color: var(--ly-deep);
  background-image:
    radial-gradient(120% 70% at 6% 0%, rgba(46, 125, 255, 0.20), rgba(10, 31, 60, 0) 58%),
    radial-gradient(90% 62% at 98% 64%, rgba(33, 230, 193, 0.10), rgba(10, 31, 60, 0) 62%);
  color: var(--ly-paper);
  overflow-x: hidden;
  padding-bottom: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .ly-breadcrumb {
  padding: 22px 0 6px;
  font-size: var(--ly-fs-12);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 20px 0 56px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-hero__title {
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  font-weight: 900;
  color: var(--ly-paper);
  margin: 0 0 20px;
  max-width: 16ch;
}

.page-about .about-hero__text {
  max-width: 52ch;
  color: rgba(244, 241, 234, 0.78);
  margin: 0 0 28px;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 20px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 18px 24px;
  border-top: 1px solid rgba(124, 140, 161, 0.28);
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__factnum {
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-28);
  line-height: 1;
  color: var(--ly-cyan);
  letter-spacing: 0.01em;
}

.page-about .about-hero__factlabel {
  font-size: var(--ly-fs-12);
  line-height: 1.5;
  color: var(--ly-steel);
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--ly-radius-card);
  overflow: hidden;
  border: 1px solid rgba(33, 230, 193, 0.24);
  background: var(--ly-ink);
}

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

/* ---------- 主体布局：刻度 + 内容 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding-top: 8px;
  padding-bottom: 40px;
}

/* 刻度 */
.page-about .about-rail__list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0 0 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  border-bottom: 1px solid rgba(124, 140, 161, 0.26);
}

.page-about .about-rail__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .about-rail__year {
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-15);
  letter-spacing: 0.02em;
  color: var(--ly-cyan);
}

.page-about .about-rail__label {
  font-size: var(--ly-fs-12);
  line-height: 1.5;
  color: var(--ly-steel);
  max-width: 18ch;
}

/* 内容列 */
.page-about .about-main {
  max-width: 62ch;
}

.page-about .about-chapter {
  position: relative;
  margin-bottom: 64px;
}

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

.page-about .about-chapter__title {
  font-family: var(--ly-font-display);
  font-size: clamp(24px, 4.4vw, 36px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ly-paper);
  margin: 0 0 14px;
}

.page-about .about-chapter__lede {
  font-size: var(--ly-fs-21);
  line-height: 1.6;
  font-weight: 500;
  color: var(--ly-paper);
  margin: 0 0 20px;
  max-width: 40ch;
}

.page-about .about-chapter__text {
  font-size: var(--ly-fs-17);
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.74);
  margin: 0 0 20px;
}

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

/* ---------- 团队分工矩阵 ---------- */
.page-about .about-roles {
  margin-top: 28px;
  border-top: 1px solid rgba(124, 140, 161, 0.24);
}

.page-about .about-roles__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(124, 140, 161, 0.24);
  transition: background-color 160ms ease, padding-left 160ms ease;
}

.page-about .about-roles__row:hover {
  background-color: rgba(33, 230, 193, 0.06);
  padding-left: 12px;
}

.page-about .about-roles__name {
  font-family: var(--ly-font-display);
  font-size: var(--ly-fs-21);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ly-paper);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-roles__count {
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ly-ink);
  background: var(--ly-cyan);
  border-radius: var(--ly-radius-pill);
  padding: 3px 10px;
}

.page-about .about-roles__desc {
  font-size: var(--ly-fs-15);
  line-height: 1.8;
  color: var(--ly-steel);
  margin: 0;
}

/* ---------- 校对流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  counter-reset: none;
}

.page-about .about-steps__item {
  position: relative;
  padding: 18px 0 22px 0;
  border-top: 1px solid rgba(124, 140, 161, 0.24);
}

.page-about .about-steps__idx {
  display: block;
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  letter-spacing: 0.08em;
  color: var(--ly-coral);
  margin-bottom: 6px;
}

.page-about .about-steps__name {
  font-family: var(--ly-font-display);
  font-size: var(--ly-fs-21);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ly-paper);
  margin: 0 0 8px;
}

.page-about .about-steps__text {
  font-size: var(--ly-fs-15);
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.72);
  margin: 0;
  max-width: 46ch;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
  border-radius: var(--ly-radius-card);
  overflow: hidden;
  border: 1px solid rgba(124, 140, 161, 0.3);
  background: var(--ly-ink);
}

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

.page-about .about-figure__caption {
  padding: 12px 16px 14px;
  font-size: var(--ly-fs-12);
  line-height: 1.65;
  color: var(--ly-steel);
  border-top: 1px solid rgba(124, 140, 161, 0.22);
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 28px 24px;
}

.page-about .about-stats__item {
  border-left: 1px solid rgba(33, 230, 193, 0.3);
  padding-left: 14px;
}

.page-about .about-stats__num {
  font-family: var(--ly-font-mono);
  font-size: clamp(36px, 6vw, 52px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ly-paper);
  margin: 0 0 8px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-stats__unit {
  font-size: var(--ly-fs-15);
  letter-spacing: 0;
  color: var(--ly-amber);
}

.page-about .about-stats__label {
  font-size: var(--ly-fs-12);
  line-height: 1.6;
  color: var(--ly-steel);
  margin: 0;
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  margin-top: 24px;
  padding: 56px 0 72px;
  background: linear-gradient(180deg, rgba(7, 20, 39, 0) 0%, rgba(7, 20, 39, 0.85) 42%, var(--ly-ink) 100%);
}

.page-about .about-close__title {
  font-family: var(--ly-font-display);
  font-size: clamp(26px, 4.6vw, 40px);
  font-weight: 800;
  letter-spacing: -0.022em;
  line-height: 1.14;
  color: var(--ly-paper);
  margin: 0 0 16px;
  max-width: 20ch;
}

.page-about .about-close__text {
  font-size: var(--ly-fs-17);
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.74);
  max-width: 58ch;
  margin: 0 0 28px;
}

.page-about .about-close__links {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid rgba(124, 140, 161, 0.26);
}

.page-about .about-close__links li {
  border-bottom: 1px solid rgba(124, 140, 161, 0.26);
}

.page-about .about-close__link {
  display: block;
  padding: 16px 4px;
  font-size: var(--ly-fs-17);
  font-weight: 600;
  color: var(--ly-paper);
  text-decoration: none;
  transition: color 120ms ease, padding-left 160ms ease, background-color 160ms ease;
}

.page-about .about-close__link:hover,
.page-about .about-close__link:focus-visible {
  color: var(--ly-cyan);
  padding-left: 12px;
  background-color: rgba(33, 230, 193, 0.06);
}

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

/* ---------- 中等屏幕 ---------- */
@media (min-width: 760px) {
  .page-about .about-roles__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }

  .page-about .about-close__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }
}

/* ---------- 桌面：刻度轨 + 荧光青竖线 ---------- */
@media (min-width: 1000px) {
  .page-about .about-hero {
    padding: 36px 0 72px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-layout {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 56px;
    padding-top: 12px;
  }

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

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 34px;
    margin: 0;
    padding: 4px 0 4px 22px;
    border-bottom: 0;
    border-left: 1px solid rgba(124, 140, 161, 0.3);
  }

  .page-about .about-main {
    padding-left: 40px;
    position: relative;
  }

  .page-about .about-main::before {
    content: "";
    position: absolute;
    left: 12px;
    top: 6px;
    bottom: 6px;
    width: 1px;
    background: linear-gradient(180deg, var(--ly-cyan) 0%, rgba(33, 230, 193, 0.35) 55%, rgba(33, 230, 193, 0.06) 100%);
  }

  .page-about .about-chapter {
    margin-bottom: 88px;
  }

  .page-about .about-chapter::before {
    content: "";
    position: absolute;
    top: 13px;
    left: -28px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ly-cyan);
    box-shadow: 0 0 0 4px rgba(33, 230, 193, 0.14);
    transform: translateX(-50%);
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 40px;
  }

  .page-about .about-figure--aside {
    width: 88%;
    margin-left: auto;
  }

  .page-about .about-close {
    padding: 80px 0 96px;
  }
}

@media (min-width: 1240px) {
  .page-about .about-layout {
    grid-template-columns: 188px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .about-hero__grid {
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-roles__row,
  .page-about .about-close__link {
    transition: none;
  }
}
<<<END>>>