/* ========== 看台团队 / about ========== */

.page-about {
  --ab-cut: 22px;
  background: var(--night);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.75;
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(20px, 3.4vw, 40px) clamp(30px, 5vw, 66px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -24%;
  right: -14%;
  width: min(680px, 82vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 42% 42%, rgba(47, 243, 208, 0.16), transparent 66%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  left: 0;
  right: 0;
  bottom: 0;
  height: 52%;
  background: linear-gradient(135deg, rgba(78, 123, 255, 0.15), transparent 58%);
  clip-path: polygon(0 42%, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
}

.page-about .ab-hero__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(32px, 6vw, 70px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-about .ab-hero__title em {
  font-style: normal;
  color: var(--neon);
}

.page-about .ab-hero__lead {
  max-width: 60ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
  color: var(--mute);
  font-size: clamp(15px, 1.55vw, 17px);
}

/* 数据条 */

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-stats__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: clamp(13px, 2vw, 20px);
  background: var(--deck);
  outline: none;
}

.page-about .ab-stats__item:focus-visible {
  box-shadow: inset 0 0 0 2px var(--neon);
}

.page-about .ab-stats__num {
  font-family: var(--mono);
  font-size: clamp(28px, 4.4vw, 50px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stats__num--hot {
  color: var(--orange);
}

.page-about .ab-stats__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mute);
}

.page-about .ab-stats__note {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
  transition: max-height 0.28s ease, opacity 0.28s ease, margin-top 0.28s ease;
}

.page-about .ab-stats__item:hover .ab-stats__note,
.page-about .ab-stats__item:focus .ab-stats__note,
.page-about .ab-stats__item:focus-within .ab-stats__note {
  max-height: 6em;
  opacity: 1;
  margin-top: 6px;
}

@media (hover: none) {
  .page-about .ab-stats__note {
    max-height: 6em;
    opacity: 1;
    margin-top: 6px;
  }
}

/* ---------- 通用区块 ---------- */

.page-about .ab-block {
  border-top: 1px solid var(--line);
  padding-block: clamp(34px, 5.5vw, 72px);
}

.page-about .ab-block .section-head {
  max-width: 70ch;
}

.page-about .ab-block .lead {
  color: var(--mute);
}

.page-about a {
  color: var(--neon);
  text-decoration-color: rgba(47, 243, 208, 0.35);
  text-underline-offset: 3px;
}

.page-about a:hover {
  text-decoration-color: var(--neon);
}

/* ---------- 班底构成 / 标签页 ---------- */

.page-about .ab-tabs {
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-about .ab-tabs .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-bottom: 10px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-tabs .tab {
  min-height: 44px;
  padding: 10px 16px;
  font-size: 14px;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
}

.page-about .ab-tabs .tab[aria-selected="true"] {
  background: var(--deck);
  border-color: var(--neon);
  color: var(--neon);
}

.page-about .ab-tabpanel {
  display: block;
  padding: clamp(18px, 2.8vw, 32px);
  background:
    linear-gradient(160deg, rgba(78, 123, 255, 0.08), transparent 52%),
    var(--deck);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-tabpanel[hidden] {
  display: none;
}

.page-about .ab-tabpanel__title {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.3vw, 24px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-about .ab-tabpanel__text {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  color: var(--mute);
}

.page-about .ab-list {
  display: grid;
  gap: 9px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 11px;
  height: 2px;
  background: var(--neon);
}

/* ---------- 赛后流程 ---------- */

.page-about .ab-flow__banner {
  margin: clamp(18px, 2.6vw, 30px) 0 clamp(20px, 3vw, 32px);
}

.page-about .ab-flow__steps {
  position: relative;
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .ab-step {
  position: relative;
  padding: clamp(15px, 2.2vw, 22px) clamp(16px, 2.4vw, 26px);
  background: linear-gradient(100deg, var(--deck) 0%, rgba(10, 29, 46, 0.5) 100%);
  border-left: 2px solid var(--line);
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-about .ab-step:hover {
  border-left-color: var(--neon);
  background: linear-gradient(100deg, rgba(47, 243, 208, 0.07) 0%, rgba(10, 29, 46, 0.5) 100%);
}

.page-about .ab-step__idx {
  display: block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-about .ab-step__title {
  margin: 0 0 4px;
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .ab-step__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  color: var(--mute);
}

.page-about .ab-flow__trail {
  display: block;
  width: 100%;
  height: clamp(48px, 7vw, 84px);
  margin-top: clamp(12px, 2vw, 20px);
  opacity: 0.75;
  pointer-events: none;
}

/* ---------- 复核机制 ---------- */

.page-about .ab-check__grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .ab-check__intro {
  max-width: 46ch;
}

.page-about .ab-check__points {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-check__point {
  position: relative;
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2vw, 22px);
  background: var(--night);
}

.page-about .ab-check__idx {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .ab-check__point h3 {
  margin: 0 0 4px;
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 800;
}

.page-about .ab-check__point p {
  margin: 0;
  font-size: 14px;
  color: var(--mute);
}

.page-about .ab-check__note {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding-left: 18px;
  max-width: 72ch;
  border-left: 2px solid var(--orange);
  font-size: 15px;
  color: var(--ink);
}

/* ---------- 发展历程 ---------- */

.page-about .ab-timeline__grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 2.8vw, 34px);
}

.page-about .ab-timeline__aside {
  position: relative;
}

.page-about .ab-timeline__figure {
  margin: 0;
}

.page-about .ab-timeline__note {
  margin: 12px 0 0;
}

.page-about .ab-milestones {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-milestone {
  position: relative;
  padding-left: clamp(18px, 3vw, 32px);
  border-left: 1px solid var(--line);
}

.page-about .ab-milestone::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.55em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--neon);
}

.page-about .ab-milestone__year {
  display: block;
  margin-bottom: 7px;
  font-family: var(--mono);
  font-size: clamp(22px, 3.2vw, 36px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-milestone h3 {
  margin: 0 0 6px;
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .ab-milestone p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  color: var(--mute);
}

/* ---------- 合作生态 ---------- */

.page-about .ab-partner__layout {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 2.8vw, 32px);
}

.page-about .ab-partner__figure {
  margin: 0;
}

.page-about .ab-partner__facts {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  align-content: start;
}

.page-about .ab-partner__fact {
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--deck);
}

.page-about .ab-partner__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 600;
  line-height: 1;
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-partner__fact h3 {
  margin: 0 0 6px;
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 800;
  line-height: 1.4;
}

.page-about .ab-partner__fact p {
  margin: 0;
  font-size: 14px;
  color: var(--mute);
}

/* ---------- 服务覆盖 ---------- */

.page-about .ab-reach__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(20px, 2.8vw, 32px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-reach__card {
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--night);
}

.page-about .ab-reach__card:nth-child(2) {
  background: var(--deck);
}

.page-about .ab-reach__card:nth-child(4) {
  background: var(--deck);
}

.page-about .ab-reach__card-title {
  position: relative;
  margin: 0 0 8px;
  padding-left: 14px;
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .ab-reach__card-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--neon);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

.page-about .ab-reach__card-text {
  margin: 0;
  font-size: 14px;
  color: var(--mute);
}

.page-about .ab-reach__callout {
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: clamp(16px, 2.4vw, 24px);
  border-left: 2px solid var(--blue);
  background: rgba(78, 123, 255, 0.07);
}

.page-about .ab-reach__callout p {
  margin: 0;
  max-width: 76ch;
  font-size: 15px;
}

/* ---------- 结尾 ---------- */

.page-about .ab-cta {
  padding-block: clamp(34px, 5.5vw, 68px) clamp(10px, 2vw, 20px);
}

.page-about .ab-cta__inner {
  padding: clamp(22px, 3.4vw, 40px);
  background:
    linear-gradient(115deg, rgba(47, 243, 208, 0.1), transparent 58%),
    var(--deck);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .ab-cta__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 30ch;
  font-size: clamp(20px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .ab-check__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .ab-timeline__grid {
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-timeline__aside {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
  }

  .page-about .ab-partner__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-flow__steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .ab-step {
    padding-inline: clamp(14px, 1.6vw, 20px);
  }
}

@media (min-width: 1100px) {
  .page-about .ab-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-stats__note {
    transition: none;
  }
}