.page-about {
  --about-rail-w: 320px;
  --about-gap: 56px;
  display: block;
  background: var(--ink);
  color: var(--text);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 4vw, 36px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--silver);
}

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

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

.page-about .about-crumbs .crumbs__sep {
  color: var(--line-cyan);
}

.page-about .about-crumbs [aria-current] {
  color: var(--ice);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 4vw, 40px) clamp(40px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 78%;
  height: 130%;
  background: radial-gradient(58% 58% at 74% 32%, rgba(0, 229, 255, 0.16), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, var(--line) 0 1px, transparent 1px 96px);
  opacity: 0.4;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 5.4vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: 0.02em;
  color: var(--ice);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.82;
  color: var(--text);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-stats__item {
  padding: 14px 10px 14px 0;
  border-right: 1px solid var(--line);
}

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

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-stats__num small {
  font-size: 0.6em;
  letter-spacing: 0;
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--silver);
}

.page-about .about-hero__figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  filter: drop-shadow(0 26px 60px rgba(0, 229, 255, 0.13));
}

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

/* ---------- 主体网格 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(36px, 5vw, 60px) clamp(56px, 8vw, 96px);
}

/* ---------- 右侧目录 ---------- */
.page-about .about-rail {
  order: -1;
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-about .about-toc {
  padding: 18px 16px;
  border-radius: var(--radius);
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-toc__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--ice);
  background: rgba(0, 229, 255, 0.07);
}

.page-about .about-toc__link[aria-current] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(0, 229, 255, 0.1);
}

.page-about .about-toc__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-about .about-toc__link[aria-current] .about-toc__idx {
  color: var(--cyan);
}

.page-about .about-note {
  padding: 16px;
  border-radius: var(--radius);
}

.page-about .about-note__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-note p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-note__link {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.84rem;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .about-note__link:hover,
.page-about .about-note__link:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-block: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--line);
}

.page-about .about-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-sec__head {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-about .about-h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.18;
  letter-spacing: 0.025em;
  color: var(--ice);
  text-wrap: balance;
}

.page-about .about-p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

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

/* ---------- 四条主线 ---------- */
.page-about .about-axes {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-axes__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-axes__idx {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-axes__item:nth-child(2) .about-axes__idx {
  color: var(--violet);
}

.page-about .about-axes__item:nth-child(3) .about-axes__idx {
  color: var(--magenta);
}

.page-about .about-axes__item:nth-child(4) .about-axes__idx {
  color: var(--amber);
}

.page-about .about-axes__body {
  min-width: 0;
}

.page-about .about-axes__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: 0.03em;
  color: var(--ice);
}

.page-about .about-axes__desc {
  margin: 0 0 10px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-axes__use {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--line-cyan);
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--silver);
}

/* ---------- 发展历程 ---------- */
.page-about .about-tl__figure {
  margin: 0 0 26px;
  max-width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.page-about .about-tl__figure .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(to bottom, var(--line-cyan), rgba(0, 229, 255, 0.05));
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 0 0 26px 32px;
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.12);
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--amber);
}

.page-about .about-tl__body {
  min-width: 0;
}

.page-about .about-tl__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--ice);
}

.page-about .about-tl__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 编辑与数据协作 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin: 6px 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .about-team__item {
  padding: 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--graphite);
}

.page-about .about-team__item:nth-child(2) {
  border-left-color: var(--violet);
}

.page-about .about-team__item:nth-child(3) {
  border-left-color: var(--magenta);
}

.page-about .about-team__item:nth-child(4) {
  border-left-color: var(--amber);
}

.page-about .about-team__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--ice);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.76;
  color: var(--text);
}

/* ---------- 赛季档案 ---------- */
.page-about .about-archive {
  display: grid;
  gap: 22px;
}

.page-about .about-archive__body {
  min-width: 0;
}

.page-about .about-archive__facts {
  display: grid;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-archive__facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-archive__num {
  flex: none;
  min-width: 3em;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-archive__num small {
  font-size: 0.6em;
}

.page-about .about-archive__label {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-archive__figure {
  margin: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.page-about .about-archive__figure .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 14px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners li {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(0, 229, 255, 0.06), rgba(123, 97, 255, 0.04) 62%, transparent);
}

.page-about .about-partners li:nth-child(1) {
  border-top: 2px solid var(--cyan);
}

.page-about .about-partners li:nth-child(2) {
  border-top: 2px solid var(--violet);
}

.page-about .about-partners li:nth-child(3) {
  border-top: 2px solid var(--magenta);
}

.page-about .about-partners__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--ice);
}

.page-about .about-partners__desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.74;
  color: var(--text);
}

/* ---------- 服务与支持 ---------- */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 22px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-links a:hover,
.page-about .about-links a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-axes__item {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 0 20px;
    align-items: start;
    padding: 20px 0;
  }

  .page-about .about-tl__item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 0 22px;
    padding-left: 34px;
  }

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

  .page-about .about-tl__figure {
    max-width: 520px;
  }
}

@media (min-width: 760px) {
  .page-about .about-archive {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

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

  .page-about .about-partners li:nth-child(2) {
    margin-top: 20px;
  }

  .page-about .about-partners li:nth-child(3) {
    margin-top: 40px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 44px;
  }
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) var(--about-rail-w);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    order: 0;
    position: sticky;
    top: 88px;
    align-self: start;
  }
}