.page-about {
  --about-rail: 104px;
  --about-radius: 2px;
  --about-panel-line: rgba(143, 163, 184, 0.24);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 52px;
  background: var(--grad-hero);
  border-bottom: 2px solid var(--about-panel-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 92px 92px;
  opacity: 0.6;
  pointer-events: none;
}

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

.page-about .about-hero__frame {
  border: 2px solid var(--about-panel-line);
  background: rgba(10, 24, 48, 0.58);
  padding: clamp(22px, 4vw, 44px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-hero__frame .breadcrumb {
  margin-bottom: 22px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 8.2vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 22px 0 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-panel-line);
  border: 1px solid var(--about-panel-line);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--night);
}

.page-about .about-hero__stat-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
  letter-spacing: 0.02em;
}

.page-about .about-hero__stat-label {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-about .about-hero__scale {
  display: none;
}

/* ---------- 章节索引 ---------- */

.page-about .about-index {
  padding: 16px 0;
  background: var(--ink);
  border-bottom: 1px solid var(--about-panel-line);
}

.page-about .about-index__inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-index__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--about-panel-line);
  border-radius: var(--about-radius);
  font-size: 13px;
  white-space: nowrap;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible,
.page-about .about-index__link.is-active {
  color: var(--lime);
  border-color: var(--line-strong);
  background: rgba(198, 255, 74, 0.08);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  padding: clamp(48px, 8vw, 96px) 0;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 9vw, 66px);
  font-weight: 700;
  line-height: 0.9;
  color: rgba(198, 255, 74, 0.14);
  -webkit-text-stroke: 1.4px var(--lime);
}

.page-about .about-chapter__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-chapter__title {
  margin: 0 0 16px;
  font-size: clamp(25px, 4.6vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .about-chapter__lede {
  max-width: 64ch;
  margin: 0 0 20px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-chapter__text {
  max-width: 64ch;
  margin: 26px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-inline-link {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-inline-link:hover {
  color: var(--cyan);
}

/* ---------- 赛季横向卷轴 ---------- */

.page-about .season-scroller {
  display: flex;
  gap: 16px;
  margin: 28px -2px 0;
  padding: 6px 2px 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .season-card {
  flex: 0 0 min(300px, 80vw);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 20px;
  scroll-snap-align: start;
  background: linear-gradient(170deg, rgba(18, 42, 36, 0.95), rgba(10, 24, 48, 0.95));
  border: 2px solid var(--about-panel-line);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-hard);
}

.page-about .season-card__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: 0.02em;
}

.page-about .season-card:nth-child(2) .season-card__year {
  color: var(--orange);
}

.page-about .season-card:nth-child(3) .season-card__year {
  color: var(--cyan);
}

.page-about .season-card:nth-child(4) .season-card__year {
  color: var(--gold);
}

.page-about .season-card__title {
  margin: 4px 0 0;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .season-card__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .season-card__meta {
  margin: auto 0 0;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mute);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 四块内容 ---------- */

.page-about .line-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-about .line-card {
  position: relative;
  padding: 20px 22px 22px;
  background: linear-gradient(180deg, rgba(18, 42, 36, 0.9), rgba(10, 24, 48, 0.9));
  border: 1px solid var(--about-panel-line);
  border-left: 4px solid var(--lime);
  border-radius: var(--about-radius);
}

.page-about .line-card:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-about .line-card:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .line-card:nth-child(4) {
  border-left-color: var(--gold);
}

.page-about .line-card__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mute);
}

.page-about .line-card__title {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .line-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */

.page-about .team-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .role-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-panel-line);
}

.page-about .role-item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-panel-line);
}

.page-about .role-item__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .role-item__title {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .role-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-quote {
  margin: 30px 0 0;
  padding: 20px 24px;
  border: 2px solid var(--line-strong);
  border-left-width: 6px;
  background: rgba(198, 255, 74, 0.06);
  border-radius: var(--about-radius);
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(17px, 2.4vw, 21px);
  line-height: 1.6;
  color: var(--paper);
}

/* ---------- 场馆图例 ---------- */

.page-about .venue-legend {
  display: grid;
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-panel-line);
  border: 1px solid var(--about-panel-line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .venue-legend__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 13px 15px;
  background: var(--night);
  transition: background-color 0.2s var(--ease);
}

.page-about .venue-legend__item:hover {
  background: var(--panel);
}

.page-about .venue-legend__code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .venue-legend__name {
  font-size: 15px;
  color: var(--text);
}

.page-about .venue-legend__meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--mute);
}

/* ---------- 跨端 ---------- */

.page-about .platform-track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.page-about .platform-card {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--panel);
  border: 2px solid var(--about-panel-line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .platform-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: var(--lime);
}

.page-about .platform-card--app::before {
  background: var(--orange);
}

.page-about .platform-card--mini::before {
  background: var(--cyan);
}

.page-about .platform-card__ver {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .platform-card__title {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .platform-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 合作生态 ---------- */

.page-about .expand-stack {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .expand-stack .expand {
  border-radius: var(--about-radius);
}

/* ---------- 结尾引导 ---------- */

.page-about .about-cta-wrap {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: clamp(24px, 5vw, 48px);
  background: linear-gradient(120deg, #0B1F1A 0%, #0A1830 58%, #122A24 100%);
  border: 2px solid var(--about-panel-line);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta__title {
  margin: 12px 0 0;
  font-size: clamp(23px, 4vw, 36px);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta__para {
  max-width: 56ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

/* ---------- 窄屏保护 ---------- */

.page-about .media,
.page-about .media__frame,
.page-about .media__img {
  max-width: 100%;
}

.page-about .media__img {
  height: auto;
}

/* ---------- 响应式 ---------- */

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

  .page-about .about-index__inner {
    flex-direction: row;
    align-items: center;
    gap: 18px;
  }

  .page-about .about-index__title {
    flex: 0 0 auto;
  }

  .page-about .venue-legend__item {
    grid-template-columns: 108px minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 14px;
  }

  .page-about .venue-legend__meta {
    text-align: right;
  }
}

@media (min-width: 760px) {
  .page-about .line-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .platform-track {
    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: 900px) {
  .page-about .about-hero {
    padding: 64px 0 72px;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-chapter__rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 40px;
    align-items: start;
  }

  .page-about .team-split__media {
    margin-top: 6px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 72px;
    gap: 44px;
    align-items: stretch;
  }

  .page-about .about-hero__scale {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin: 0;
    padding: 14px 0 14px 20px;
    list-style: none;
    border-left: 2px solid var(--about-panel-line);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.14em;
    color: var(--mute);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .venue-legend__item {
    transition: none;
  }

  .page-about .season-scroller {
    scroll-behavior: auto;
  }
}