.page-about {
  background: var(--pitch-night);
  color: var(--paper);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 88px) 0 clamp(36px, 5vw, 64px);
  border-bottom: 3px solid var(--blueprint);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(200, 255, 61, 0.14) 0%, rgba(8, 18, 13, 0) 58%),
    var(--pitch-night);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--blueprint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--blueprint) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: 0.4;
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--blueprint);
}

.page-about .about-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 4px 14px;
  border-bottom: 1px solid var(--blueprint);
}

.page-about .about-hero__meta-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-hero__meta-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

/* ---------- 档案夹骨架 ---------- */
.page-about .about-body {
  padding-bottom: var(--section-y);
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-index {
  position: relative;
  padding: 14px 0;
  border-top: 3px solid var(--lime);
  border-bottom: 1px solid var(--blueprint);
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-index__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  min-height: 44px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--paper);
  background: var(--grass-deep);
  border: 2px solid var(--blueprint);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index__item:hover,
.page-about .about-index__item:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
}

.page-about .about-index__item:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .about-index__num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .about-index__text {
  font-size: 14px;
  font-weight: 600;
}

/* ---------- 区块 ---------- */
.page-about .about-main {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 7vw, 96px);
  min-width: 0;
}

.page-about .about-block {
  scroll-margin-top: 120px;
  min-width: 0;
}

.page-about .about-block--paper {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(24px, 4vw, 48px);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-about .about-block__head {
  border-top: 3px solid var(--lime);
  padding-top: 14px;
}

.page-about .about-block__head--ink {
  border-top-color: var(--signal);
}

.page-about .about-block__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.8vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .about-block__lede {
  max-width: 66ch;
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-block--paper .about-block__lede {
  color: var(--ink-soft);
}

.page-about .about-block__foot {
  max-width: 66ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--blueprint);
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-block--paper .about-block__foot {
  border-top-color: rgba(18, 20, 15, 0.22);
  color: var(--ink-soft);
}

.page-about .about-block__foot .link-arrow {
  color: var(--lime);
}

.page-about .about-block--paper .about-block__foot .link-arrow {
  color: var(--signal);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--lime), var(--blueprint) 65%, rgba(31, 61, 46, 0) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(30px, 4.5vw, 48px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 9px;
  width: 13px;
  height: 13px;
  background: var(--pitch-night);
  border: 2px solid var(--lime);
  transform: rotate(45deg);
  transition: background 0.25s var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background: var(--lime);
}

.page-about .about-timeline__ver {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-about .about-timeline__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-timeline__text {
  max-width: 60ch;
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 图片容器微调 ---------- */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 2px solid var(--blueprint);
  background: var(--grass-deep);
}

.page-about .about-figure--top {
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-about .about-figure .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-block--paper .about-figure {
  border-color: var(--ink);
}

/* ---------- 团队分工 ---------- */
.page-about .roster {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin-top: var(--gap);
}

.page-about .roster-card {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--grass-deep);
  border: 2px solid var(--blueprint);
  border-top: 4px solid var(--lime);
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .roster-card:hover,
.page-about .roster-card:focus-within {
  transform: translate(-3px, -3px);
  border-color: var(--lime);
}

.page-about .roster-card__num {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .roster-card__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.01em;
}

.page-about .roster-card__duty {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper);
}

.page-about .roster-card__note {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--blueprint);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 赛事覆盖 ---------- */
.page-about .league-group {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .league-group__name {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .league-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .league-cloud .tag {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  line-height: 1.3;
}

/* ---------- 合作生态 ---------- */
.page-about .partner-chain {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-node {
  position: relative;
  padding: 20px 18px;
  background: var(--grass-deep);
  border: 2px solid var(--blueprint);
  box-shadow: var(--shadow-soft);
}

.page-about .partner-node--core {
  border-color: var(--lime);
  background: linear-gradient(160deg, rgba(200, 255, 61, 0.12) 0%, var(--grass-deep) 62%);
}

.page-about .partner-node__tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-about .partner-node--core .partner-node__tag {
  color: var(--lime);
}

.page-about .partner-node__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.page-about .partner-node__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .partner-node--core .partner-node__text {
  color: var(--paper);
}

/* ---------- 更新节奏 ---------- */
.page-about .cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-about .cadence__table {
  min-width: 0;
  border: 2px solid var(--blueprint);
  background: var(--grass-deep);
}

.page-about .cadence__caption {
  padding: 14px 16px 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .cadence .data-table {
  width: 100%;
}

.page-about .cadence__figure {
  margin: 0;
  border: 2px solid var(--blueprint);
  background: var(--grass-deep);
}

.page-about .cadence__figure .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 服务通道 ---------- */
.page-about .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-about .channel-card {
  display: flex;
  flex-direction: column;
  padding: 22px 20px;
  background: var(--grass-deep);
  border: 2px solid var(--blueprint);
  border-left: 4px solid var(--lime);
}

.page-about .channel-card--signal {
  border-left-color: var(--signal);
}

.page-about .channel-card__tag {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .channel-card--signal .channel-card__tag {
  color: var(--signal);
}

.page-about .channel-card__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  letter-spacing: -0.01em;
}

.page-about .channel-card__text {
  margin: 12px 0 20px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .channel-card .btn-row {
  margin-top: auto;
}

/* ---------- 联系信息 ---------- */
.page-about .about-contact {
  margin-top: clamp(30px, 4vw, 46px);
  padding: clamp(22px, 3vw, 32px);
  background: var(--grass-deep);
  border: 3px solid var(--blueprint);
  box-shadow: var(--shadow-hard);
}

.page-about .about-contact__title {
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--lime);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
}

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

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--blueprint);
}

.page-about .about-contact__row dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.65;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-contact__row dd a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.4);
}

.page-about .about-contact__row dd a:hover,
.page-about .about-contact__row dd a:focus-visible {
  color: var(--lime-soft);
  border-bottom-color: var(--lime-soft);
}

.page-about .about-contact__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

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

  .page-about .about-hero__meta-item {
    padding: 18px 16px 16px;
    border-right: 1px solid var(--blueprint);
  }

  .page-about .about-hero__meta-item:first-child {
    padding-left: 0;
  }

  .page-about .about-hero__meta-item:last-child {
    border-right: 0;
  }

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

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

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

  .page-about .channel-grid .channel-card:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-contact__row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

/* ---------- 桌面：索引竖栏 + 内容 ---------- */
@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 128px;
    padding: 16px 0 0;
    border-bottom: 0;
    border-top: 3px solid var(--lime);
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__item {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 12px 12px 14px;
    background: transparent;
    border: 0;
    border-left: 3px solid var(--blueprint);
  }

  .page-about .about-index__item:hover,
  .page-about .about-index__item:focus-visible {
    border-left-color: var(--lime);
    background: var(--grass-deep);
    color: var(--lime);
  }

  .page-about .about-block--paper {
    padding: clamp(36px, 4vw, 60px);
  }

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

  .page-about .roster-card:nth-child(2) {
    transform: translateY(14px);
  }

  .page-about .roster-card:nth-child(4) {
    transform: translateY(14px);
  }

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

  .page-about .partner-node:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: calc(var(--gap) * -1);
    width: var(--gap);
    height: 2px;
    background: var(--blueprint);
  }

  .page-about .cadence {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .channel-grid .channel-card:last-child {
    grid-column: auto;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1200px) {
  .page-about .about-hero__title {
    max-width: 16ch;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .roster-card,
  .page-about .about-index__item,
  .page-about .about-timeline__item::before {
    transition: none;
  }

  .page-about .roster-card:hover,
  .page-about .roster-card:focus-within {
    transform: none;
  }

  .page-about .roster-card:nth-child(2),
  .page-about .roster-card:nth-child(4) {
    transform: none;
  }
}