.page-about {
  --about-shift: clamp(0px, 8vw, 132px);
}

.page-about [id] {
  scroll-margin-top: 132px;
}

.page-about .about-lead {
  padding-top: clamp(18px, 4vw, 38px);
}

.page-about .lead-grid {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
  margin-top: 12px;
}

.page-about .about-lead h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.85rem, 6.2vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-about .about-lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-kpis {
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-band {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  margin-top: clamp(26px, 4.5vw, 46px);
  padding: 16px 2px;
  border-top: 1px solid var(--edge);
  border-bottom: 1px solid var(--edge);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-band .chip {
  flex: 0 0 auto;
  white-space: nowrap;
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  padding-bottom: clamp(40px, 7vw, 76px);
}

.page-about .hist-list {
  position: relative;
  display: grid;
  gap: clamp(24px, 4.5vw, 52px);
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .hist-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--home) 0%, var(--signal) 36%, var(--away) 70%, var(--volt) 100%);
  opacity: .62;
}

.page-about .hist-item {
  position: relative;
  padding-left: 38px;
}

.page-about .hist-node {
  position: absolute;
  left: 0;
  top: 26px;
  box-sizing: border-box;
  width: 17px;
  height: 17px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 1px currentColor, 0 0 14px currentColor;
}

.page-about .hist-node--home { color: var(--home); }
.page-about .hist-node--away { color: var(--away); }
.page-about .hist-node--volt { color: var(--volt); }

.page-about .hist-panel {
  padding: clamp(20px, 3vw, 30px);
}

.page-about .hist-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about .hist-time {
  font-size: .8125rem;
  letter-spacing: .05em;
  color: var(--mist);
}

.page-about .hist-panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .hist-panel p {
  margin: 0 0 1em;
  font-size: .9688rem;
  line-height: 1.78;
  color: var(--mist);
}

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

.page-about .hist-media {
  margin: 20px 0 0;
}

.page-about .ha-card {
  margin: 18px 0;
}

.page-about .ha-side {
  padding: 16px 18px;
  border: 2px solid var(--edge);
  border-radius: 14px;
  background: var(--deep);
}

.page-about .ha-side--home { border-left: 6px solid var(--home); }
.page-about .ha-side--away { border-left: 6px solid var(--away); }

.page-about .ha-label {
  display: block;
  margin-bottom: 8px;
  font-size: .8125rem;
  letter-spacing: .06em;
}

.page-about .ha-side--home .ha-label { color: var(--home); }
.page-about .ha-side--away .ha-label { color: var(--away); }

.page-about .ha-side p {
  margin: 0;
  font-size: .9063rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .ha-foot {
  color: var(--mist);
}

/* ---------- 版本条目 ---------- */

.page-about .ver-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .ver-item {
  border: 3px solid var(--edge);
  border-radius: 14px;
  background: var(--deep);
  overflow: hidden;
}

.page-about .ver-item > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1rem;
  color: var(--ice);
}

.page-about .ver-item > summary::-webkit-details-marker {
  display: none;
}

.page-about .ver-item > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 1.375rem;
  line-height: 1;
  color: var(--home);
  transition: transform .22s ease;
}

.page-about .ver-item[open] > summary::after {
  transform: rotate(45deg);
}

.page-about .ver-item[open] > summary {
  border-bottom: 3px solid var(--edge);
}

.page-about .ver-idx {
  font-size: .8125rem;
  color: var(--mist);
}

.page-about .ver-body {
  padding: 16px 18px 20px;
}

.page-about .ver-body p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  gap: clamp(20px, 3.5vw, 38px);
  margin-top: clamp(38px, 6vw, 70px);
  align-items: start;
}

.page-about .team-copy h3 {
  margin: 10px 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .team-copy > p {
  margin: 0 0 1em;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .team-stats {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-stats li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--edge);
}

.page-about .team-num {
  min-width: 3.4ch;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--home);
}

.page-about .team-cap {
  font-size: .9375rem;
  color: var(--mist);
}

.page-about .team-media {
  margin: 0;
}

/* ---------- 图片 ---------- */

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 12px;
}

.page-about .media-frame figcaption {
  margin-top: 10px;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 专题系列 ---------- */

.page-about .series-band {
  display: grid;
  gap: 16px;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .series-item {
  padding: 22px;
  border: 3px solid var(--edge);
  border-radius: var(--r-panel);
  background: linear-gradient(158deg, rgba(139, 92, 255, .18), rgba(139, 92, 255, 0) 62%), var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .series-idx {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border: 2px solid var(--volt);
  border-radius: var(--r-pill);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--volt);
}

.page-about .series-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.125rem;
  line-height: 1.3;
  color: var(--ice);
}

.page-about .series-item p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 场馆与合作 ---------- */

.page-about .venue-grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 42px);
  align-items: start;
}

.page-about .venue-copy h2 {
  margin: 10px 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--ice);
}

.page-about .venue-copy p {
  margin: 0 0 1em;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .venue-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .venue-stats li {
  padding: 14px 16px;
  border: 2px solid var(--edge);
  border-radius: 14px;
  background: var(--deep);
}

.page-about .venue-num {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2.125rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}

.page-about .venue-cap {
  display: block;
  margin-top: 6px;
  font-size: .8125rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .venue-media {
  margin: 0;
}

/* ---------- 接下来 ---------- */

.page-about .next-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .next-card {
  position: relative;
  padding: 26px 22px 24px;
  border: 3px solid var(--edge);
  border-top-width: 6px;
  border-radius: var(--r-panel);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: transform .22s ease, box-shadow .22s ease;
}

.page-about .next-card--home { border-top-color: var(--home); }
.page-about .next-card--away { border-top-color: var(--away); }
.page-about .next-card--volt { border-top-color: var(--volt); }

.page-about .next-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.page-about .next-num {
  display: block;
  margin-bottom: 14px;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--mist);
}

.page-about .next-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.125rem;
  line-height: 1.3;
  color: var(--ice);
}

.page-about .next-card p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-cta {
  margin-top: clamp(30px, 4.5vw, 48px);
}

/* ---------- 媒体查询：桌面镜像错位 ---------- */

@media (min-width: 880px) {
  .page-about .lead-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-about .hist-item {
    padding-left: 58px;
  }

  .page-about .hist-list::before {
    left: 8px;
  }

  .page-about .hist-item:nth-child(odd) .hist-panel {
    margin-right: clamp(24px, 7vw, 110px);
  }

  .page-about .hist-item:nth-child(even) .hist-panel {
    margin-left: var(--about-shift);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

  .page-about .team-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 26px;
  }

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

  .page-about .venue-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

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

@media (min-width: 1120px) {
  .page-about .hist-item:nth-child(even) .hist-panel {
    margin-left: clamp(80px, 12vw, 190px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }

  .page-about .next-card:hover {
    transform: none;
  }
}