.page-about {
  --about-line: rgba(35, 64, 58, 0.6);
  --about-rail-w: 132px;
  padding-bottom: clamp(48px, 8vw, 104px);
  overflow-x: clip;
}

.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 6vw, 76px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -20% auto -20%;
  height: 130%;
  background:
    radial-gradient(760px 400px at 78% -8%, rgba(198, 255, 61, 0.12), transparent 62%),
    radial-gradient(560px 320px at 6% 12%, rgba(124, 224, 195, 0.08), transparent 66%),
    linear-gradient(180deg, rgba(23, 33, 30, 0.9), rgba(11, 31, 26, 0) 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -6%;
  bottom: 6%;
  width: clamp(120px, 22vw, 260px);
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--lime));
  transform: skewX(-32deg);
  opacity: 0.7;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--about-line);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.page-about .about-fact {
  background: var(--panel);
  padding: 16px 18px 18px;
}

.page-about .about-fact dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-fact dd {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-fact dd span {
  margin-left: 3px;
  font-size: 0.5em;
  font-weight: 500;
  color: var(--mist);
}

.page-about .about-fact.is-ember dd {
  color: var(--ember);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  position: relative;
  padding: clamp(38px, 6vw, 84px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-sec::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: clamp(46px, 8vw, 108px);
  height: 3px;
  background: var(--lime);
  transform: skewX(-30deg);
  transform-origin: left center;
}

.page-about .about-sec.is-last {
  padding-bottom: clamp(20px, 4vw, 40px);
}

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

.page-about .about-rail {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: 24px;
}

.page-about .about-rail::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  width: 1px;
  height: 26px;
  background: linear-gradient(180deg, var(--lime), rgba(198, 255, 61, 0));
}

.page-about .about-num {
  position: relative;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: transparent;
  -webkit-text-stroke: 1px var(--lime);
}

.page-about .about-num::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -5px;
  border-radius: 50%;
  background: var(--lime);
}

.page-about .about-rail-label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-title {
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-intro {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-body .prose {
  max-width: 66ch;
  color: var(--mist);
}

.page-about .about-body .prose p {
  margin: 0 0 16px;
  line-height: 1.8;
}

.page-about .about-body .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-note {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  max-width: 70ch;
  padding-left: 14px;
  border-left: 2px solid var(--tactical);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-note a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-note a:hover {
  color: var(--lime);
}

/* ---------- 01 起点 ---------- */
.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}

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

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

/* ---------- 02 记录范围 ---------- */
.page-about .rec-list {
  list-style: none;
  margin: 0;
  padding: 1px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-line);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.page-about .rec-item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 20px 20px 22px;
  background: var(--panel);
  transition: background 200ms var(--ease);
}

.page-about .rec-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--lime);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 220ms var(--ease);
}

.page-about .rec-item:hover {
  background: #1b2724;
}

.page-about .rec-item:hover::after {
  transform: scaleY(1);
}

.page-about .rec-num {
  grid-row: 1 / span 2;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--lime);
  padding-top: 3px;
}

.page-about .rec-title {
  margin: 0;
  grid-column: 2;
  font-family: var(--font-head);
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .rec-text {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .rec-text a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 03 覆盖范围 ---------- */
.page-about .cov-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
}

.page-about .cov-ring-wrap {
  text-align: center;
}

.page-about .coverage-ring {
  display: block;
  width: min(260px, 72vw);
  height: auto;
  margin: 0 auto;
}

.page-about .cov-count {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .cov-count span {
  color: var(--lime);
  font-weight: 700;
}

.page-about .cov-groups {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .cov-group {
  padding: 16px 18px 18px;
  border-left: 2px solid var(--tactical);
  background: linear-gradient(90deg, rgba(23, 33, 30, 0.92), rgba(23, 33, 30, 0.2));
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .cov-group:hover {
  border-left-color: var(--lime);
  background: linear-gradient(90deg, rgba(35, 64, 58, 0.7), rgba(23, 33, 30, 0.15));
}

.page-about .cov-group.is-filtered {
  display: none;
}

.page-about .cov-group-head {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .cov-group-head em {
  margin-left: auto;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .cov-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: none;
}

.page-about .cov-dot.is-lime {
  background: var(--lime);
}

.page-about .cov-dot.is-mint {
  background: var(--mint);
}

.page-about .cov-dot.is-ember {
  background: var(--ember);
}

.page-about .cov-group-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 04 校对 ---------- */
.page-about .about-quote {
  margin: clamp(24px, 3.4vw, 36px) 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--ember);
  font-family: var(--font-head);
  font-size: clamp(18px, 2.3vw, 24px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-quote cite {
  display: block;
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  font-style: normal;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 05 团队 ---------- */
.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .team-item {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--panel);
  border-radius: var(--radius-panel);
  border: 1px solid transparent;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .team-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 34px;
  height: 3px;
  background: var(--lime);
  transform: skewX(-30deg);
}

.page-about .team-item:hover {
  border-color: var(--tactical);
  transform: translateY(-3px);
}

.page-about .team-name {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .team-text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 06 跨联赛 ---------- */
.page-about .cross-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .cross-panel {
  position: relative;
  padding: 24px 22px 26px;
  border-radius: var(--radius-panel);
  background: linear-gradient(150deg, rgba(35, 64, 58, 0.55), rgba(23, 33, 30, 0.95));
  border-left: 3px solid var(--lime);
}

.page-about .cross-panel.is-ember {
  border-left-color: var(--ember);
  background: linear-gradient(150deg, rgba(255, 90, 43, 0.14), rgba(23, 33, 30, 0.95));
}

.page-about .cross-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .cross-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .cross-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 07 形态演进 ---------- */
.page-about .about-backdrop {
  position: relative;
  margin-bottom: clamp(24px, 3vw, 34px);
  border-radius: var(--radius-panel);
  overflow: hidden;
  max-height: 220px;
}

.page-about .about-backdrop img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  filter: saturate(0.7);
}

.page-about .about-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.15), var(--ink-900));
}

.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: stage;
}

.page-about .stage-item {
  position: relative;
  padding: 0 0 22px 26px;
  border-left: 1px solid var(--tactical);
}

.page-about .stage-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .stage-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--lime);
}

.page-about .stage-item:last-child::before {
  background: var(--lime);
}

.page-about .stage-no {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .stage-title {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .stage-text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---------- 08 运营信息 ---------- */
.page-about .ops-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  padding: 1px;
  background: var(--about-line);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.page-about .ops-block {
  background: var(--panel);
  padding: 22px 20px 24px;
}

.page-about .ops-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .ops-value {
  margin: 0;
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
  word-break: break-word;
}

.page-about .ops-block:first-child .ops-value {
  color: var(--lime);
}

.page-about .ops-note {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .ops-note a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .rec-item:last-child {
    grid-column: 1 / -1;
  }

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

  .page-about .team-item:last-child {
    grid-column: 1 / -1;
  }

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

  .page-about .ops-block.is-wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-left: 20px;
    position: sticky;
    top: calc(var(--pill-h) + 28px);
    align-self: start;
  }

  .page-about .about-rail::before {
    left: 3px;
    top: 4px;
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, rgba(198, 255, 61, 0.85), rgba(35, 64, 58, 0.2));
  }

  .page-about .about-num {
    font-size: 26px;
  }

  .page-about .about-num::before {
    left: -20px;
    width: 9px;
    height: 9px;
    margin-top: -4px;
  }

  .page-about .about-cols {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .about-cols.is-reverse {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-about .coverage {
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  }

  .page-about .cov-ring-wrap {
    text-align: left;
  }

  .page-about .coverage-ring {
    margin: 0;
  }

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

  .page-about .team-item:last-child {
    grid-column: auto;
  }

  .page-about .about-backdrop {
    max-height: 260px;
  }
}

@media (min-width: 1120px) {
  .page-about .rec-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .rec-item:last-child {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rec-item,
  .page-about .rec-item::after,
  .page-about .cov-group,
  .page-about .team-item {
    transition: none;
  }

  .page-about .team-item:hover {
    transform: none;
  }
}