.page-about {
  --about-hair: rgba(168, 245, 238, .14);
  --about-glow: rgba(34, 224, 208, .16);
  padding-bottom: clamp(56px, 8vw, 112px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--text-dim);
  display: flex;
  gap: 8px;
  align-items: center;
}

.page-about .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 140ms ease, border-color 140ms ease;
}

.page-about .breadcrumb a:hover {
  color: var(--ice);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .hero {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  padding: clamp(32px, 5vw, 64px) 0 clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--about-hair);
  position: relative;
}

.page-about .hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 62%;
  height: 320px;
  background: radial-gradient(60% 60% at 70% 30%, var(--about-glow), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.page-about .hero__text h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 6.4vw, 84px);
  line-height: 1.02;
  letter-spacing: -.03em;
  color: var(--mist);
  margin: 14px 0 0;
  max-width: 18ch;
}

.page-about .hero__lede {
  margin-top: 22px;
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.78;
  color: var(--text);
  max-width: 62ch;
}

.page-about .eyebrow {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  align-self: end;
}

.page-about .hero__stats li {
  padding: 18px 16px;
  border-radius: var(--r-card);
  background: linear-gradient(160deg, var(--panel), rgba(14, 42, 79, .28));
  border: 1px solid var(--about-hair);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .stat-num {
  font-family: var(--font-num);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

.page-about .stat-lab {
  font-size: 12.5px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ---------- 两栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(36px, 5vw, 64px);
}

/* ---------- 目录 ---------- */
.page-about .toc {
  border-top: 1px solid var(--about-hair);
  padding: 16px 0 6px;
}

.page-about .toc__title {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 14px;
}

.page-about .toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-size: 13px;
  line-height: 1.3;
  color: var(--text-dim);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-hair);
  background: rgba(14, 42, 79, .38);
  transition: color 140ms ease, border-color 140ms ease, background 140ms ease;
}

.page-about .toc__year {
  font-family: var(--font-num);
  font-weight: 700;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .toc__link:hover {
  color: var(--ice);
  border-color: var(--line-strong);
}

.page-about .toc__link[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .toc__link[aria-current="true"] .toc__year {
  color: var(--ink);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding-bottom: clamp(44px, 6vw, 80px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .chapter + .chapter {
  border-top: 1px solid var(--about-hair);
  padding-top: clamp(36px, 5vw, 60px);
}

.page-about .chapter__year {
  font-family: var(--font-num);
  font-size: clamp(46px, 9vw, 104px);
  font-weight: 700;
  line-height: .88;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(34, 224, 208, .48);
  font-variant-numeric: tabular-nums;
  margin: 0 0 6px;
}

.page-about .chapter h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--mist);
  margin: 0 0 20px;
  max-width: 22ch;
}

.page-about .chapter__intro {
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-dim);
  max-width: 66ch;
  margin: -6px 0 28px;
}

.page-about .prose p {
  font-size: 16px;
  line-height: 1.82;
  color: var(--text);
  margin: 0 0 18px;
  max-width: 68ch;
}

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

.page-about .prose a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 208, .48);
  transition: color 140ms ease, border-color 140ms ease;
}

.page-about .prose a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 图文错位 ---------- */
.page-about .chapter__split {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .frame {
  margin: 0;
  border-radius: var(--r-a);
  overflow: hidden;
  background: linear-gradient(150deg, var(--panel-2), var(--ink));
  border: 1px solid var(--about-hair);
  position: relative;
}

.page-about .frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .coverage__visual img {
  aspect-ratio: 14 / 9;
}

.page-about .frame__caption {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-dim);
  padding: 12px 16px;
  border-top: 1px solid var(--about-hair);
  background: rgba(6, 16, 41, .55);
}

/* ---------- 年份时间轴 ---------- */
.page-about .yearline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--about-hair);
}

.page-about .yearline__item {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 44px) clamp(20px, 3vw, 32px);
}

.page-about .yearline__item:last-child {
  padding-bottom: 0;
}

.page-about .yearline__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 14px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(34, 224, 208, .12);
}

.page-about .yearline__item:nth-child(2n)::before {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 138, 31, .12);
}

.page-about .yearline__year {
  font-family: var(--font-num);
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ice);
  font-variant-numeric: tabular-nums;
  display: block;
  margin-bottom: 10px;
}

.page-about .yearline__item h3 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--mist);
  margin: 0 0 8px;
}

.page-about .yearline__item p {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-dim);
  margin: 0;
  max-width: 62ch;
}

/* ---------- 团队分工 ---------- */
.page-about .teams {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .team {
  padding: 22px 22px 24px;
  background: linear-gradient(155deg, var(--panel), rgba(6, 16, 41, .7));
  border: 1px solid var(--about-hair);
  border-radius: var(--r-b);
  border-top-width: 3px;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.page-about .team:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 14px 34px rgba(3, 10, 27, .55);
}

.page-about .team--cyan { border-top-color: var(--cyan); }
.page-about .team--orange { border-top-color: var(--orange); }
.page-about .team--violet { border-top-color: var(--violet); }
.page-about .team--yellow { border-top-color: var(--yellow); }

.page-about .team__name {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--mist);
  margin: 0 0 10px;
}

.page-about .team__desc {
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--text-dim);
  margin: 0;
}

/* ---------- 覆盖范围 ---------- */
.page-about .coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
}

.page-about .coverage__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(34, 224, 208, .32) 1px, transparent 1.3px);
  background-size: 15px 15px;
  opacity: .5;
  pointer-events: none;
  mix-blend-mode: screen;
}

.page-about .coverage .prose p {
  margin-bottom: 22px;
}

.page-about .statlines {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-about .statline {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .statline__k {
  font-size: 14px;
  color: var(--text-dim);
}

.page-about .statline__v {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 22px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .coverage__tail {
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--text-dim);
  margin: 0;
}

.page-about .coverage__tail a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 208, .48);
}

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

/* ---------- 反向错位 ---------- */
.page-about .chapter__split--reverse .prose {
  order: -1;
}

/* ---------- 认可 ---------- */
.page-about .chapter--tight .chapter__year {
  -webkit-text-stroke-color: rgba(255, 138, 31, .55);
  color: transparent;
}

.page-about .awards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 26px;
}

.page-about .award {
  padding: 24px 22px;
  border-radius: var(--r-a);
  background: rgba(14, 42, 79, .5);
  border: 1px solid var(--about-hair);
  position: relative;
  overflow: hidden;
}

.page-about .award::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}

.page-about .award--cyan::before { background: var(--cyan); }
.page-about .award--orange::before { background: var(--orange); }

.page-about .award__year {
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--cyan);
  margin: 0 0 10px;
  font-weight: 700;
}

.page-about .award--orange .award__year {
  color: var(--orange);
}

.page-about .award__title {
  font-family: var(--font-head);
  font-size: 17.5px;
  font-weight: 700;
  color: var(--mist);
  margin: 0 0 8px;
  line-height: 1.4;
}

.page-about .award__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
  margin: 0;
}

.page-about .recognition__tail {
  margin-bottom: 0;
}

/* ---------- 加入与合作 ---------- */
.page-about .chapter--short {
  padding-bottom: 0;
}

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

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-about .teams {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-about .about-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-about .toc-wrap {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .toc__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .toc__link {
    border-radius: 10px;
    white-space: normal;
    width: 100%;
    justify-content: flex-start;
  }

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

  .page-about .chapter__split--reverse {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-about .chapter__split--reverse .prose {
    order: 0;
  }

  .page-about .coverage {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .frame {
    margin-top: 6px;
  }
}

@media (min-width: 1120px) {
  .page-about .teams {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>