/* ===== 品牌档案页 · page-about ===== */
.page-about {
  --about-notch: 20px;
  --about-line: rgba(15, 163, 163, .45);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(40px, 7vw, 84px);
  background: linear-gradient(158deg, var(--dawn) 0%, var(--cloud) 48%, var(--cloud) 100%);
}

.page-about .about-hero__deco {
  position: absolute;
  right: -12%;
  bottom: -46%;
  width: 78%;
  height: 118%;
  background: repeating-linear-gradient(12deg, rgba(27, 111, 209, .10) 0 1px, transparent 1px 28px);
  transform: rotate(-3deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__inner .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 6vw, 60px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ink);
  transform: skewX(-3deg);
  transform-origin: left bottom;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 62ch;
  color: var(--gray);
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin-top: clamp(28px, 5vw, 48px);
  border-top: 1px solid rgba(92, 107, 120, .22);
  border-left: 1px solid rgba(92, 107, 120, .22);
}

.page-about .about-hero__stats .stat {
  padding: 18px 16px 16px;
  background: rgba(255, 255, 255, .62);
  border-right: 1px solid rgba(92, 107, 120, .22);
  border-bottom: 1px solid rgba(92, 107, 120, .22);
}

.page-about .about-hero__stats .stat__num {
  display: block;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--sky);
  letter-spacing: -0.02em;
}

.page-about .about-hero__stats .stat:first-child .stat__num {
  color: var(--gold);
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--gray);
}

/* ---------- 时间线整体 ---------- */
.page-about .about-timeline-wrap {
  padding: clamp(48px, 9vw, 104px) 0 clamp(40px, 6vw, 72px);
  background: var(--cloud);
}

.page-about .about-timeline-head {
  display: flex;
  gap: clamp(14px, 2.5vw, 28px);
  align-items: flex-start;
  padding-bottom: clamp(32px, 5vw, 56px);
  border-bottom: 2px solid rgba(20, 26, 31, .08);
}

.page-about .about-timeline-head .display--sm {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-timeline-head__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  color: var(--gray);
  line-height: 1.8;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(36px, 6vw, 64px) 0 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 14px;
  bottom: 60px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--lake) 30%, var(--sky) 68%, var(--deep) 100%);
  opacity: .5;
}

/* ---------- 时间线条目 ---------- */
.page-about .tl-item {
  position: relative;
  padding-left: 62px;
  padding-bottom: clamp(56px, 9vw, 100px);
}

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

.page-about .tl-item__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gold);
  background: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  z-index: 2;
}

.page-about .tl-item:hover .tl-item__marker,
.page-about .tl-item:focus-within .tl-item__marker {
  background: var(--gold);
  color: var(--ink);
}

.page-about .tl-item__note {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gray);
}

.page-about .tl-item__title {
  position: relative;
  margin: 0 0 16px;
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .tl-item__title::after {
  content: "";
  display: block;
  width: 52px;
  height: 3px;
  margin-top: 14px;
  background: var(--gold);
  transform: skewX(-18deg);
  transition: width var(--dur) var(--ease);
}

.page-about .tl-item:hover .tl-item__title::after {
  width: 92px;
}

.page-about .tl-item__body > p {
  max-width: 68ch;
  margin: 0 0 16px;
  line-height: 1.82;
  color: var(--ink);
}

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

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--gray);
}

/* ---------- 团队分组 ---------- */
.page-about .team-cards {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-card {
  padding: 22px 20px 20px;
  background: var(--dawn);
  border-top: 3px solid var(--sky);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  background: #d6e7f8;
}

.page-about .team-card__idx {
  display: inline-block;
  padding: 3px 8px;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
  background: var(--ink);
}

.page-about .team-card h4 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .tl-item__body .team-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--gray);
}

/* ---------- 赛季步骤 ---------- */
.page-about .season-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  counter-reset: none;
}

.page-about .season-steps li {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--cloud);
  border-top: 3px solid var(--lake);
}

.page-about .season-steps li:first-child {
  border-top-color: var(--gold);
}

.page-about .season-steps__idx {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sky);
}

.page-about .season-steps strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .tl-item__body .season-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--gray);
}

/* ---------- 数据模块 ---------- */
.page-about .data-grid {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .data-block {
  padding: 24px 20px;
  background: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .data-block__num {
  display: block;
  margin-bottom: 12px;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .data-block h4 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--cloud);
}

.page-about .tl-item__body .data-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(245, 248, 251, .72);
}

.page-about .tl-item__body .data-note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  font-size: 14px;
  line-height: 1.74;
  color: var(--gray);
}

/* ---------- 合作机构 ---------- */
.page-about .org-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .org-item {
  padding: 20px 18px;
  background: #fff;
  border: 1px solid rgba(92, 107, 120, .26);
  border-top: 3px solid var(--lake);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .org-item:hover {
  transform: translateY(-2px);
  border-top-color: var(--gold);
}

.page-about .org-item .tag {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .08em;
}

.page-about .org-item h4 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .tl-item__body .org-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--gray);
}

/* ---------- 观众分组 ---------- */
.page-about .aud-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .aud-card {
  display: flex;
  flex-direction: column;
  padding: 24px 22px 20px;
  background: var(--cloud);
  border-bottom: 3px solid var(--sky);
  clip-path: polygon(20px 0, 100% 0, 100% 100%, 0 100%, 0 20px);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .aud-card:hover {
  transform: translateY(-2px);
  background: var(--dawn);
}

.page-about .aud-card h4 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .tl-item__body .aud-card p {
  flex: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

.page-about .aud-card__link {
  align-self: flex-start;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--sky);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .aud-card__link:hover,
.page-about .aud-card__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.page-about .aud-card__link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 0 0 clamp(48px, 8vw, 96px);
  background: var(--cloud);
}

.page-about .about-cta .wrap {
  padding-top: 0;
}

.page-about .about-cta__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 4.5vw, 52px);
  background: linear-gradient(140deg, var(--sky) 0%, var(--deep) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-cta__panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(12deg, rgba(255, 255, 255, .08) 0 1px, transparent 1px 24px);
  pointer-events: none;
}

.page-about .about-cta__title {
  position: relative;
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: #fff;
}

.page-about .about-cta__text {
  position: relative;
  max-width: 60ch;
  margin: 16px 0 0;
  line-height: 1.8;
  color: rgba(245, 248, 251, .86);
}

.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-timeline-head {
    align-items: center;
  }

  .page-about .about-timeline::before {
    left: 79px;
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 30px 40px minmax(0, 1fr);
    column-gap: 30px;
    padding-left: 0;
    align-items: start;
  }

  .page-about .tl-item__note {
    grid-column: 1;
    justify-self: center;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    margin: 0;
    padding-top: 6px;
    letter-spacing: .26em;
    white-space: nowrap;
  }

  .page-about .tl-item__marker {
    position: static;
    grid-column: 2;
  }

  .page-about .tl-item__body {
    grid-column: 3;
    min-width: 0;
  }

  .page-about .tl-item:nth-child(even) .tl-item__body {
    margin-left: clamp(20px, 4vw, 64px);
  }

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

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .org-item,
  .page-about .aud-card,
  .page-about .tl-item__marker,
  .page-about .tl-item__title::after {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .org-item:hover,
  .page-about .aud-card:hover {
    transform: none;
  }
}