.page-about {
  --ab-gap: clamp(24px, 4vw, 64px);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-block: clamp(16px, 3vw, 28px) 0;
}

/* ---------- 首屏框景 ---------- */
.page-about .ab-hero {
  padding-block: clamp(16px, 3vw, 32px) clamp(28px, 4vw, 48px);
}

.page-about .ab-hero__frame {
  position: relative;
  border: 1px solid var(--grid);
  border-radius: var(--r-lg);
  padding: clamp(26px, 4.5vw, 60px) clamp(20px, 4vw, 56px) clamp(30px, 4.5vw, 58px);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(0, 229, 255, .10), transparent 62%),
    linear-gradient(180deg, var(--panel), var(--bg));
  overflow: hidden;
}

.page-about .ab-hero__frame::before,
.page-about .ab-hero__frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border: 1px solid var(--cyan);
  opacity: .55;
  pointer-events: none;
}

.page-about .ab-hero__frame::before {
  top: 14px;
  left: 14px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: 10px;
}

.page-about .ab-hero__frame::after {
  right: 14px;
  bottom: 14px;
  border-left: 0;
  border-top: 0;
  border-bottom-right-radius: 10px;
}

.page-about .ab-hero__ticks {
  position: absolute;
  top: 0;
  left: 8%;
  right: 8%;
  height: 10px;
  background: repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-about .ab-hero__coords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 4px 0 clamp(20px, 3vw, 30px);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .ab-hero__title {
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.005em;
  color: var(--white);
}

.page-about .ab-hero__title br {
  display: none;
}

.page-about .ab-hero__lede {
  max-width: 62ch;
  margin: 0;
  color: var(--ink);
}

.page-about .ab-hero__facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--grid);
}

.page-about .ab-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .ab-hero__num {
  font-family: var(--font-data);
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-hero__facts li:first-child .ab-hero__num {
  color: var(--orange);
}

.page-about .ab-hero__slant {
  display: block;
  height: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  background: linear-gradient(90deg, transparent, var(--cyan) 10%, var(--cyan) 62%, transparent);
  transform: rotate(-0.6deg);
  transform-origin: left center;
}

/* ---------- 非对称主体栅格 ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  padding-block: var(--band);
}

/* ---------- 左侧章节轨道 ---------- */
.page-about .ab-rail {
  min-width: 0;
}

.page-about .ab-rail__label {
  margin: 0 0 14px;
  color: var(--muted);
}

.page-about .ab-rail__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.page-about .ab-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border: 1px solid var(--grid);
  border-radius: var(--r-pill);
  color: var(--muted);
  font-size: 13.5px;
  text-decoration: none;
  transition: color .22s var(--ease-out), border-color .22s var(--ease-out), background-color .22s var(--ease-out);
}

.page-about .ab-rail__list a::before {
  content: "";
  flex: none;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: .7;
}

.page-about .ab-rail__list a:hover,
.page-about .ab-rail__list a.is-current,
.page-about .ab-rail__list a[aria-current="true"] {
  color: var(--cyan);
  border-color: rgba(0, 229, 255, .45);
}

/* ---------- 右侧叙述流 ---------- */
.page-about .ab-flow {
  display: flex;
  flex-direction: column;
  gap: var(--band);
  min-width: 0;
}

.page-about .ab-sec {
  scroll-margin-top: 112px;
  min-width: 0;
}

.page-about .ab-sec__num {
  margin: 0 0 10px;
  color: var(--cyan);
}

.page-about .ab-sec > h2 {
  margin: 0 0 clamp(16px, 2.5vw, 24px);
  max-width: 24ch;
  color: var(--white);
}

.page-about .ab-sec__intro {
  max-width: 62ch;
  margin: 0 0 clamp(16px, 2.5vw, 24px);
  color: var(--muted);
}

.page-about .ab-prose {
  max-width: 68ch;
}

.page-about .ab-prose p {
  margin: 0 0 1.4em;
  color: var(--ink);
}

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

/* ---------- 赛季时间刻度 ---------- */
.page-about .ab-timeline {
  list-style: none;
  position: relative;
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, rgba(0, 229, 255, .85), rgba(30, 42, 60, 1) 42%, var(--grid));
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 36px) clamp(26px, 4vw, 38px);
}

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

.page-about .ab-timeline__tick {
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  background: var(--bg);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, .10);
}

.page-about .ab-timeline__item:last-child .ab-timeline__tick {
  border-color: var(--orange);
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 26, .18);
}

.page-about .ab-timeline__season {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .ab-timeline__item h3 {
  margin: 0 0 8px;
}

.page-about .ab-timeline__item p {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
}

/* ---------- 图组 ---------- */
.page-about .ab-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

.page-about .ab-figure .media {
  position: relative;
  border: 1px solid var(--grid);
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

.page-about .ab-figure--wall .media {
  aspect-ratio: 3 / 2;
}

.page-about .ab-figure--night .media {
  aspect-ratio: 14 / 9;
}

.page-about .ab-figure--map .media {
  aspect-ratio: 4 / 3;
}

.page-about .ab-figure .media__caption {
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- 全宽数据条 ---------- */
.page-about .ab-band {
  position: relative;
  border: 1px solid var(--grid);
  border-radius: var(--r-lg);
  padding: clamp(26px, 4vw, 48px);
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(0, 229, 255, .12), transparent 58%),
    radial-gradient(120% 130% at 100% 100%, rgba(255, 107, 26, .12), transparent 58%),
    var(--panel);
  overflow: hidden;
}

.page-about .ab-band::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  opacity: .85;
}

.page-about .ab-band__label {
  margin: 0;
  color: var(--muted);
}

.page-about .ab-band__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
  margin: clamp(18px, 3vw, 28px) 0 0;
}

.page-about .ab-band__cell {
  margin: 0;
  min-width: 0;
}

.page-about .ab-band__cell dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .ab-band__cell dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: clamp(22px, 2.8vw, 34px);
  line-height: 1;
  color: var(--white);
}

/* ---------- 合作方式 ---------- */
.page-about .ab-collab {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid var(--grid);
}

.page-about .ab-collab__row {
  display: grid;
  gap: 8px 28px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .ab-collab__tag {
  margin: 0;
  color: var(--gold);
}

.page-about .ab-collab__row h3 {
  margin: 0 0 8px;
}

.page-about .ab-collab__row p {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
}

/* ---------- 长期坚持 ---------- */
.page-about .ab-principles {
  list-style: none;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
}

.page-about .ab-principles__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 4px 8px 4px 16px;
  border-left: 2px solid var(--grid);
  transition: border-color .25s var(--ease-out);
}

.page-about .ab-principles__item:hover {
  border-left-color: var(--cyan);
}

.page-about .ab-principles__idx {
  font-family: var(--font-data);
  font-size: 18px;
  line-height: 1.35;
  color: var(--cyan);
}

.page-about .ab-principles__item h3 {
  margin: 0 0 8px;
}

.page-about .ab-principles__item p {
  max-width: 64ch;
  margin: 0;
  color: var(--muted);
}

/* ---------- 收束区 ---------- */
.page-about .ab-cta {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .ab-cta__inner {
  border: 1px solid var(--grid);
  border-radius: var(--r-lg);
  padding: clamp(26px, 4.5vw, 56px);
  background:
    linear-gradient(140deg, rgba(255, 107, 26, .12), transparent 58%),
    var(--panel);
}

.page-about .ab-cta__inner h2 {
  margin: 0 0 14px;
  max-width: 22ch;
  color: var(--white);
}

.page-about .ab-cta__inner p {
  max-width: 62ch;
  margin: 0 0 clamp(20px, 3vw, 30px);
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .ab-band__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .ab-hero__title br {
    display: block;
  }

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

  .page-about .ab-collab__row {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .ab-band__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-layout {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: var(--ab-gap);
  }

  .page-about .ab-rail {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-about .ab-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .ab-rail__list a {
    width: 100%;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid var(--grid);
    border-radius: 0;
    background: transparent;
  }

  .page-about .ab-rail__list a::before {
    display: none;
  }

  .page-about .ab-rail__list a:hover,
  .page-about .ab-rail__list a.is-current,
  .page-about .ab-rail__list a[aria-current="true"] {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(0, 229, 255, .12), transparent 80%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-hero__slant {
    transform: none;
  }
}
</PAGE_CSS>>>