.page-about {
  --about-index-w: 218px;
  --about-gap: clamp(28px, 4vw, 58px);
  background: var(--jn-paper);
  color: var(--jn-ink);
  font-family: var(--jn-font-sans);
  min-width: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: calc(var(--jn-header-space) + 4px);
  padding-bottom: 22px;
  font-family: var(--jn-font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--jn-jiangnan);
}
.page-about .about-crumbs a {
  color: var(--jn-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--jn-jiangnan);
  transition: color .2s var(--jn-ease), border-color .2s var(--jn-ease);
}
.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--jn-orange);
  border-color: var(--jn-orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-masthead {
  position: relative;
  overflow: hidden;
  background: var(--jn-ink);
  color: var(--jn-paper);
  border-top: var(--jn-frame);
  border-bottom: var(--jn-frame);
}
.page-about .about-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(182, 255, 59, .16), transparent 58%),
    radial-gradient(90% 80% at 2% 102%, rgba(255, 122, 26, .14), transparent 62%),
    repeating-linear-gradient(118deg, rgba(124, 138, 150, .16) 0 1px, transparent 1px 52px);
}
.page-about .about-masthead__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  padding-block: clamp(26px, 4vw, 44px) clamp(44px, 6vw, 84px);
  min-width: 0;
}
.page-about .about-masthead .jn-eyebrow {
  color: var(--jn-lime);
}
.page-about .about-title {
  margin: 0;
  max-width: 15ch;
  font-size: clamp(32px, 5.6vw, 76px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: .04em;
  color: var(--jn-white);
}
.page-about .about-lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.85;
  color: rgba(244, 241, 234, .84);
}

.page-about .about-figures {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.page-about .about-figures li {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid rgba(182, 255, 59, .32);
  border-radius: var(--jn-radius-sm);
  background: rgba(255, 255, 255, .035);
}
.page-about .about-figure__num {
  display: block;
  font-family: var(--jn-font-mono);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--jn-lime);
}
.page-about .about-figure__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: rgba(244, 241, 234, .7);
}

/* ---------- 主布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-block: clamp(36px, 5vw, 64px) clamp(56px, 8vw, 108px);
}

/* ---------- 侧边索引 ---------- */
.page-about .about-index {
  min-width: 0;
}
.page-about .about-index__title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: var(--jn-frame);
  font-family: var(--jn-font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--jn-jiangnan);
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-about .about-index__list li {
  flex: 0 0 auto;
}
.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: var(--jn-radius-pill);
  font-size: 14px;
  color: var(--jn-ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s var(--jn-ease), color .2s var(--jn-ease), border-color .2s var(--jn-ease);
}
.page-about .about-index__num {
  font-family: var(--jn-font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--jn-orange);
}
.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: var(--jn-ink);
  border-color: var(--jn-line);
  color: var(--jn-white);
}
.page-about .about-index__list a:hover .about-index__num,
.page-about .about-index__list a:focus-visible .about-index__num {
  color: var(--jn-lime);
}

/* ---------- 章节容器 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(34px, 5vw, 76px);
  min-width: 0;
}
.page-about .about-block {
  position: relative;
  min-width: 0;
  padding: clamp(22px, 4vw, 48px);
  border: var(--jn-frame);
  border-radius: var(--jn-radius);
  background: var(--jn-paper);
  color: var(--jn-ink);
  box-shadow: var(--jn-shadow);
  scroll-margin-top: calc(var(--jn-header-space) + 16px);
}
.page-about .about-block--table {
  background: var(--jn-table);
  color: var(--jn-paper);
}
.page-about .about-block--wine {
  background: var(--jn-wine);
  color: var(--jn-paper);
}
.page-about .about-block--indigo {
  background: var(--jn-indigo);
  color: var(--jn-paper);
}
.page-about .about-block--table .jn-eyebrow,
.page-about .about-block--wine .jn-eyebrow,
.page-about .about-block--indigo .jn-eyebrow {
  color: var(--jn-lime);
}

.page-about .about-block__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}
.page-about .about-h2 {
  margin: 8px 0 0;
  font-size: clamp(23px, 3.2vw, 38px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: .03em;
}
.page-about .about-h3 {
  margin: 0 0 10px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  letter-spacing: .03em;
}
.page-about .about-block__intro {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(14, 26, 43, .8);
}
.page-about .about-block--table .about-block__intro,
.page-about .about-block--wine .about-block__intro,
.page-about .about-block--indigo .about-block__intro {
  color: rgba(244, 241, 234, .82);
}
.page-about .about-block__sub {
  margin-top: clamp(8px, 2vw, 16px);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  padding: 0 0 0 30px;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--jn-jiangnan) 0%, var(--jn-lime) 55%, var(--jn-orange) 100%);
}
.page-about .about-timeline__item {
  position: relative;
  min-width: 0;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 20px;
  height: 20px;
  border: var(--jn-frame);
  border-radius: 50%;
  background: var(--jn-paper);
  transition: background .25s var(--jn-ease), transform .25s var(--jn-ease);
}
.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--jn-lime);
  transform: scale(1.1);
}
.page-about .about-timeline__year {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--jn-font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--jn-indigo);
}
.page-about .about-timeline__title {
  margin: 0 0 6px;
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 700;
  letter-spacing: .02em;
}
.page-about .about-timeline__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(14, 26, 43, .8);
}
.page-about .about-timeline__extra {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(14, 26, 43, .6);
}

/* ---------- 粗边框引用块 ---------- */
.page-about .about-quote {
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  padding: clamp(20px, 3vw, 30px);
  border: var(--jn-frame);
  border-radius: var(--jn-radius);
  background: var(--jn-lime);
  color: var(--jn-line);
  box-shadow: var(--jn-shadow);
}
.page-about .about-quote__line {
  margin: 0;
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: .08em;
}
.page-about .about-quote__src {
  margin-top: 10px;
  font-family: var(--jn-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  opacity: .72;
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  border: var(--jn-frame);
  border-radius: var(--jn-radius);
  overflow: hidden;
  background: var(--jn-warm);
}
.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-media__caption,
.page-about .about-media .jn-media__caption {
  padding: 10px 14px;
  font-family: var(--jn-font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: rgba(14, 26, 43, .66);
}
.page-about .about-block--table .about-media .jn-media__caption,
.page-about .about-block--wine .about-media .jn-media__caption,
.page-about .about-block--indigo .about-media .jn-media__caption {
  color: rgba(244, 241, 234, .7);
}

/* ---------- 赛事分类 ---------- */
.page-about .about-sports {
  list-style: none;
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-sport {
  padding: 8px 16px;
  border: 1px solid rgba(182, 255, 59, .48);
  border-radius: var(--jn-radius-pill);
  background: rgba(182, 255, 59, .07);
  font-family: var(--jn-font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--jn-lime);
}

/* ---------- 榜单矩阵 ---------- */
.page-about .about-boards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid rgba(244, 241, 234, .18);
  border-radius: var(--jn-radius-sm);
  overflow: hidden;
  background: rgba(244, 241, 234, .18);
}
.page-about .about-board {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
  padding: 12px 14px;
  background: var(--jn-table);
  font-size: 14px;
  color: rgba(244, 241, 234, .9);
}
.page-about .about-board__num {
  font-family: var(--jn-font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--jn-orange);
}

/* ---------- 提示条 ---------- */
.page-about .about-note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-left: 16px;
  border-left: 4px solid var(--jn-orange);
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 241, 234, .84);
}
.page-about .about-block--paper .about-note {
  color: rgba(14, 26, 43, .8);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-team__stat {
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(244, 241, 234, .32);
  border-radius: var(--jn-radius-sm);
  background: rgba(0, 0, 0, .16);
}
.page-about .about-team__num {
  display: block;
  font-family: var(--jn-font-mono);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--jn-lime);
}
.page-about .about-team__label {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--jn-white);
}
.page-about .about-team__stat p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(244, 241, 234, .76);
}
.page-about .about-fix {
  margin-top: clamp(24px, 3.4vw, 36px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 2px dashed rgba(244, 241, 234, .3);
}
.page-about .about-fix p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 241, 234, .84);
}

/* ---------- 合作卡片 ---------- */
.page-about .about-offers {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(24px, 3.4vw, 36px);
}
.page-about .about-offer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 20px;
  border: 1px solid rgba(244, 241, 234, .28);
  border-radius: var(--jn-radius-sm);
  background: rgba(0, 0, 0, .16);
  transition: transform .25s var(--jn-ease), box-shadow .25s var(--jn-ease), border-color .25s var(--jn-ease);
}
.page-about .about-offer:hover {
  transform: translate(-2px, -2px);
  border-color: rgba(182, 255, 59, .5);
  box-shadow: 6px 6px 0 rgba(11, 15, 20, .55);
}
.page-about .about-offer h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--jn-white);
}
.page-about .about-offer p {
  flex: 1 1 auto;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 241, 234, .84);
}
.page-about .about-block--indigo .jn-btn--ghost {
  align-self: flex-start;
  border-color: rgba(244, 241, 234, .5);
  color: var(--jn-paper);
}
.page-about .about-block--indigo .jn-btn--ghost:hover {
  background: var(--jn-lime);
  border-color: var(--jn-lime);
  color: var(--jn-line);
}

/* ---------- 适用场景 ---------- */
.page-about .about-audience {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
.page-about .about-audience__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: clamp(18px, 2.6vw, 26px);
  border: var(--jn-frame);
  border-radius: var(--jn-radius);
  background: var(--jn-white);
  box-shadow: var(--jn-shadow);
  transition: transform .25s var(--jn-ease), box-shadow .25s var(--jn-ease);
}
.page-about .about-audience__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--jn-shadow-lg);
}
.page-about .about-audience__card h3 {
  margin: 0;
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 700;
  letter-spacing: .02em;
}
.page-about .about-audience__card p {
  flex: 1 1 auto;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(14, 26, 43, .78);
}
.page-about .about-audience__card a {
  align-self: flex-start;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--jn-orange);
  font-family: var(--jn-font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--jn-ink);
  text-decoration: none;
  transition: color .2s var(--jn-ease);
}
.page-about .about-audience__card a:hover,
.page-about .about-audience__card a:focus-visible {
  color: var(--jn-orange);
}

/* ---------- 结尾行动条 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 3.2vw, 34px);
  border: var(--jn-frame);
  border-radius: var(--jn-radius);
  background: linear-gradient(100deg, var(--jn-ink) 0%, var(--jn-indigo) 100%);
  color: var(--jn-paper);
  box-shadow: var(--jn-shadow-lg);
}
.page-about .about-cta__text {
  margin: 0;
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--jn-white);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-cta .jn-btn--ghost {
  border-color: rgba(244, 241, 234, .5);
  color: var(--jn-paper);
}
.page-about .about-cta .jn-btn--ghost:hover {
  background: var(--jn-paper);
  color: var(--jn-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-offers {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-audience {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-boards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4.5vw, 68px);
  }
  .page-about .about-index {
    position: sticky;
    top: calc(var(--jn-header-space) * .58);
  }
  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-index__list a {
    border-radius: var(--jn-radius-sm);
    white-space: normal;
  }
  .page-about .about-boards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-timeline__extra {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .35s var(--jn-ease), opacity .3s var(--jn-ease), margin-top .35s var(--jn-ease);
  }
  .page-about .about-timeline__item:hover .about-timeline__extra,
  .page-about .about-timeline__item:focus-within .about-timeline__extra {
    max-height: 180px;
    margin-top: 8px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-offer,
  .page-about .about-audience__card,
  .page-about .about-index__list a {
    transition: none;
  }
  .page-about .about-timeline__extra {
    max-height: none;
    margin-top: 8px;
    opacity: 1;
  }
}