.page-about {
  --about-gap: clamp(56px, 9vw, 132px);
  padding-bottom: clamp(48px, 8vw, 104px);
}

.page-about .be-breadcrumb {
  padding-top: clamp(20px, 4vw, 34px);
}

/* ============ Hero ============ */
.page-about .about-hero {
  position: relative;
  z-index: 0;
  padding-top: clamp(26px, 5vw, 58px);
  padding-bottom: clamp(44px, 7vw, 92px);
}

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-size: clamp(32px, 7.4vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.page-about .about-hero__lede {
  max-width: 48ch;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--be-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--be-muted);
  line-height: 1.5;
}

.page-about .about-hero__facts .be-num {
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 700;
  color: var(--be-text);
  letter-spacing: 0.02em;
}

.page-about .about-hero__facts li:first-child .be-num {
  color: var(--be-cyan);
}

/* ============ 主张来由 ============ */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  color: var(--be-muted);
  line-height: 1.8;
  max-width: 42ch;
}

.page-about .about-origin__text h2 {
  margin: 10px 0 16px;
}

.page-about .about-quote {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--be-cyan);
  font-size: clamp(21px, 3.6vw, 34px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: 0.01em;
  color: var(--be-text);
  max-width: 18ch;
}

.page-about .about-origin__media {
  margin: 0;
}

.page-about .about-origin__media img {
  border: 1px solid var(--be-line);
  border-radius: var(--be-radius);
}

/* ============ 时间轴 ============ */
.page-about .about-timeline__track {
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-node {
  position: relative;
}

.page-about .about-node__detail {
  background: var(--be-slate);
  border: 1px solid var(--be-line);
  border-radius: var(--be-radius-sm);
  padding: 16px 16px 18px;
  transition: transform 0.26s ease, box-shadow 0.26s ease, border-color 0.26s ease;
}

.page-about .about-node__detail:hover {
  transform: translateY(-4px);
  box-shadow: var(--be-shadow-soft);
  border-color: var(--be-cyan-edge);
}

.page-about .about-node__detail[open] {
  border-color: var(--be-cyan-edge);
}

.page-about .about-node__sum {
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-node__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-node__sum:focus-visible {
  outline: 2px solid var(--be-cyan);
  outline-offset: 4px;
}

.page-about .about-node__year {
  font-size: clamp(24px, 4vw, 30px);
  font-weight: 700;
  color: var(--be-cyan);
  letter-spacing: 0.06em;
  line-height: 1;
}

.page-about .about-node__label {
  font-size: 15px;
  font-weight: 600;
  color: var(--be-text);
  line-height: 1.45;
}

.page-about .about-node__hint {
  font-family: var(--be-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--be-muted);
}

.page-about .about-node__body {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--be-muted);
}

.page-about .about-timeline__note {
  margin: 22px 0 0;
  padding: 14px 16px;
  border: 1px dashed var(--be-cyan-edge);
  border-radius: var(--be-radius-sm);
  font-size: 13px;
  line-height: 1.7;
  color: var(--be-muted);
}

.page-about .about-timeline__note .be-num {
  color: var(--be-text);
  font-weight: 700;
}

.page-about .about-timeline__media {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

.page-about .about-timeline__media img {
  border: 1px solid var(--be-line);
  border-radius: var(--be-radius);
}

/* ============ 团队三块分区板 ============ */
.page-about .about-team__boards {
  display: grid;
  gap: 16px;
  margin-top: clamp(30px, 5vw, 52px);
}

.page-about .about-board {
  --rot: 0deg;
  position: relative;
  overflow: hidden;
  transform: rotate(var(--rot));
  background: var(--be-slate);
  border: 1px solid var(--be-line);
  border-top-width: 3px;
  border-radius: var(--be-radius);
  padding: 22px 20px 26px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.page-about .about-board:hover {
  transform: rotate(var(--rot)) translateY(-6px);
  box-shadow: var(--be-shadow);
}

.page-about .about-board--a {
  --rot: -1.1deg;
  border-top-color: var(--be-cyan);
}

.page-about .about-board--b {
  --rot: 0.9deg;
  border-top-color: var(--be-orange);
}

.page-about .about-board--c {
  --rot: -0.6deg;
  border-top-color: var(--be-green);
}

.page-about .about-board__title {
  margin: 14px 0 10px;
  font-size: clamp(18px, 2.6vw, 22px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--be-text);
}

.page-about .about-board p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--be-muted);
}

/* ============ 数据标准 ============ */
.page-about .about-standard__rules {
  margin: clamp(30px, 5vw, 48px) 0 0;
}

.page-about .about-rule__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--be-text);
}

.page-about .about-standard__rules p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--be-muted);
}

.page-about .about-flow {
  margin-top: clamp(34px, 5vw, 56px);
  padding: clamp(22px, 4vw, 34px);
  background: linear-gradient(160deg, rgba(11, 59, 60, 0.55), rgba(7, 11, 20, 0.2));
  border: 1px solid var(--be-line);
  border-radius: var(--be-radius);
}

.page-about .about-flow__svg {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-flow__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(22px, 4vw, 30px) 0 0;
}

.page-about .about-flow__jump {
  font-family: var(--be-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-decoration: none;
  color: var(--be-text);
  border: 1px solid var(--be-line);
  border-radius: 999px;
  padding: 8px 14px;
  transition: border-color 0.22s ease, color 0.22s ease, background 0.22s ease;
}

.page-about .about-flow__jump:hover,
.page-about .about-flow__jump:focus-visible {
  color: var(--be-cyan);
  border-color: var(--be-cyan-edge);
  background: var(--be-cyan-soft);
  outline: none;
}

.page-about .about-flow__nodes {
  list-style: none;
  margin: clamp(20px, 4vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-flow__node {
  scroll-margin-top: 96px;
  padding: 18px 18px 20px;
  border: 1px solid var(--be-line-soft);
  border-radius: var(--be-radius-sm);
  background: rgba(7, 11, 20, 0.45);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.page-about .about-flow__node:target {
  border-color: var(--be-cyan);
  background: rgba(7, 11, 20, 0.72);
  box-shadow: 0 0 0 1px var(--be-cyan-edge), var(--be-shadow-soft);
}

.page-about .about-flow__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--be-amber);
  margin-bottom: 8px;
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--be-text);
}

.page-about .about-flow__node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--be-muted);
}

.page-about .about-standard__media {
  margin: clamp(30px, 5vw, 48px) 0 0;
}

.page-about .about-standard__media img {
  border: 1px solid var(--be-line);
  border-radius: var(--be-radius);
}

/* ============ 球迷会合作伙伴 ============ */
.page-about .about-partners {
  margin-top: var(--about-gap);
  padding: clamp(40px, 7vw, 84px) 0;
  border-top: 1px solid var(--be-line);
  border-bottom: 1px solid var(--be-line);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 22px;
  margin-top: clamp(28px, 5vw, 44px);
}

.page-about .about-partners__item {
  padding-top: 18px;
  border-top: 2px solid var(--be-orange-edge);
}

.page-about .about-partners__title {
  margin: 0 0 10px;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 800;
  color: var(--be-text);
  line-height: 1.4;
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--be-muted);
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(28px, 5vw, 40px);
}

/* ============ 产出节奏 ============ */
.page-about .about-cadence {
  padding: clamp(40px, 7vw, 84px) 0;
  border-bottom: 1px solid var(--be-line);
}

.page-about .about-cadence__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 5vw, 44px);
}

.page-about .about-cadence__item {
  padding: 20px 18px 22px;
  background: rgba(7, 11, 20, 0.42);
  border: 1px solid var(--be-line);
  border-radius: var(--be-radius-sm);
}

.page-about .about-cadence__kpi {
  margin: 0 0 12px;
  font-family: var(--be-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--be-green);
}

.page-about .about-cadence__kpi .be-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--be-text);
  margin-right: 4px;
}

.page-about .about-cadence__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 800;
  color: var(--be-text);
}

.page-about .about-cadence__item p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--be-muted);
}

.page-about .about-cadence__link {
  margin: clamp(26px, 4vw, 36px) 0 0;
  font-size: 14px;
}

.page-about .about-cadence__link a {
  color: var(--be-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--be-cyan-edge);
  padding-bottom: 2px;
}

.page-about .about-cadence__link a:hover,
.page-about .about-cadence__link a:focus-visible {
  color: var(--be-orange);
  border-bottom-color: var(--be-orange);
  outline: none;
}

/* ============ 合作入口 ============ */
.page-about .about-cta {
  padding-top: var(--about-gap);
}

.page-about .about-cta__panel {
  position: relative;
  padding: clamp(28px, 5vw, 52px);
  border: 1px solid var(--be-line);
  border-radius: var(--be-radius);
  background: linear-gradient(145deg, rgba(27, 35, 80, 0.62), rgba(7, 11, 20, 0.5));
  overflow: hidden;
}

.page-about .about-cta__panel::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  border: 1px solid var(--be-cyan-edge);
  border-radius: 50%;
  opacity: 0.35;
  pointer-events: none;
}

.page-about .about-cta__lede {
  margin: 0 0 26px;
  max-width: 46ch;
  line-height: 1.8;
  color: var(--be-muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__links {
  list-style: none;
  margin: clamp(26px, 4vw, 34px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--be-line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: 13px;
}

.page-about .about-cta__links a {
  color: var(--be-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  color: var(--be-text);
  border-bottom-color: var(--be-cyan);
  outline: none;
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 30px;
  }

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

  .page-about .about-team__boards {
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero::before {
    content: "";
    position: absolute;
    top: -18%;
    right: -12%;
    width: 52vw;
    max-width: 560px;
    aspect-ratio: 1 / 1;
    background: repeating-linear-gradient(115deg, rgba(34, 224, 255, 0.10) 0 1px, transparent 1px 22px);
    transform: rotate(-8deg);
    -webkit-mask-image: radial-gradient(circle at 68% 32%, #000 0%, transparent 70%);
    mask-image: radial-gradient(circle at 68% 32%, #000 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px 26px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

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

  .page-about .about-node {
    padding: 0 11px;
  }

  .page-about .about-node::before {
    content: "";
    position: absolute;
    top: 0;
    left: 11px;
    right: 11px;
    height: 2px;
    background: linear-gradient(90deg, var(--be-cyan), rgba(34, 224, 255, 0.06));
  }

  .page-about .about-node__detail {
    margin-top: 22px;
  }

  .page-about .about-team__boards {
    grid-template-columns: 1.15fr 0.85fr 1fr;
    align-items: start;
    gap: 22px;
  }

  .page-about .about-flow__nodes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

  .page-about .about-cadence__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-origin__text p {
    max-width: 40ch;
  }

  .page-about .about-timeline__note {
    max-width: 720px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-board,
  .page-about .about-node__detail,
  .page-about .about-flow__node {
    transform: none;
    transition: none;
  }
}