.page-about {
  --about-card-pad: clamp(20px, 3vw, 34px);
  --about-line: 1px dashed rgba(79, 227, 193, .5);
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero-section {
  padding-top: clamp(20px, 3vw, 36px);
}

.page-about .about-hero {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

@media (min-width: 1000px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: end;
  }
}

.page-about .about-kicker {
  color: var(--orange-200);
}

.page-about .about-h1 {
  margin: 16px 0 22px;
  font-size: clamp(33px, 6.2vw, 78px);
  line-height: 1.05;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--mist-100);
  max-width: 15em;
}

.page-about .about-lede {
  max-width: 34em;
  color: var(--slate-400);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-stat {
  display: grid;
  gap: 7px;
  align-content: start;
  padding: 16px 18px 18px;
  border: 1.5px solid var(--line-mid);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-stat:hover {
  border-color: var(--cyan-400);
}

.page-about .about-stat .datacard-label {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--orange-200);
}

.page-about .about-stat .datacard-value {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat .datacard-note {
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate-400);
}

.page-about .about-hero-media {
  margin: 0;
  border: 2px solid var(--line-mid);
  box-shadow: var(--shadow-hard);
}

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

/* ---------- 章节通用 ---------- */

.page-about .about-seasons,
.page-about .about-flow,
.page-about .about-roles,
.page-about .about-eco,
.page-about .about-cta {
  padding-block: clamp(56px, 9vw, 116px);
}

.page-about .about-h2 {
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--mist-100);
  max-width: 20em;
}

.page-about .about-section-lede {
  max-width: 40em;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 赛季跳转 ---------- */

.page-about .season-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .season-jump a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 15px;
  border: 1.5px solid var(--line-mid);
  color: var(--mist-100);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .season-jump a:hover,
.page-about .season-jump a:focus-visible {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  background: rgba(20, 83, 68, .5);
}

.page-about .season-jump .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--orange-200);
}

/* ---------- 赛季时间线 ---------- */

.page-about .season-track {
  display: grid;
  gap: clamp(26px, 3.6vw, 46px);
  margin-top: clamp(34px, 5vw, 58px);
  position: relative;
}

.page-about .season-item {
  display: grid;
  gap: 14px;
}

.page-about .season-marker {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .season-dot {
  flex: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--cyan-400);
  background: var(--ink-900);
  box-shadow: 0 0 0 4px rgba(79, 227, 193, .14);
}

.page-about .season-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange-200);
}

.page-about .season-body {
  position: relative;
  padding: var(--about-card-pad);
  border: 1.5px solid var(--line-mid);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .season-body::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 24px;
  height: 24px;
  background: var(--orange-500);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  transition: background-color var(--dur) var(--ease);
}

.page-about .season-body:hover {
  border-color: var(--cyan-400);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--night-950);
}

.page-about .season-body:hover::after {
  background: var(--cyan-400);
}

.page-about .season-title {
  margin: 0 0 14px;
  padding-right: 28px;
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.4;
  font-weight: 900;
  color: var(--mist-100);
}

.page-about .season-body p {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-about .season-points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .season-points li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cyan-200);
}

.page-about .season-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 12px;
  height: 1.5px;
  background: var(--orange-500);
}

.page-about .season-figure {
  margin: 0;
  border: 1.5px solid var(--line-mid);
  box-shadow: var(--shadow-hard-sm);
}

@media (min-width: 880px) {
  .page-about .season-track::before {
    content: "";
    position: absolute;
    left: 42px;
    top: 18px;
    bottom: 18px;
    border-left: var(--about-line);
  }

  .page-about .season-item {
    grid-template-columns: 84px minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-about .season-marker {
    flex-direction: column;
    gap: 10px;
    padding-top: 26px;
  }

  .page-about .season-figure {
    grid-column: 2;
  }
}

@media (min-width: 1200px) {
  .page-about .season-track > .season-item:nth-child(1) .season-body { margin-right: 12%; }
  .page-about .season-track > .season-item:nth-child(2) .season-body { margin-right: 4%; }
  .page-about .season-track > .season-item:nth-child(4) .season-body { margin-right: 18%; }
}

/* ---------- 归档流程 ---------- */

.page-about .flow-list {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  border-top: 1.5px solid var(--line-mid);
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(16px, 3vw, 34px);
  align-items: start;
  padding: clamp(22px, 3vw, 32px) 0;
  border-bottom: 1.5px solid var(--line-faint);
  transition: background-color var(--dur) var(--ease);
}

.page-about .flow-step:hover {
  background: rgba(20, 83, 68, .38);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1;
  color: var(--cyan-400);
  opacity: .8;
  font-variant-numeric: tabular-nums;
  min-width: 2.2em;
}

.page-about .flow-title {
  margin: 0 0 10px;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.45;
  font-weight: 900;
  color: var(--mist-100);
}

.page-about .flow-copy p {
  margin: 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 两条线的分工 ---------- */

.page-about .roles-grid {
  display: grid;
  gap: clamp(18px, 2.5vw, 28px);
  margin-top: clamp(30px, 4vw, 48px);
}

@media (min-width: 880px) {
  .page-about .roles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .roles-col {
  padding: clamp(22px, 3vw, 34px);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard-sm);
  border: 1.5px solid var(--line-mid);
}

.page-about .roles-col--data {
  border-top: 4px solid var(--cyan-400);
}

.page-about .roles-col--content {
  border-top: 4px solid var(--orange-500);
}

.page-about .roles-label {
  margin: 0;
  color: var(--orange-200);
}

.page-about .roles-title {
  margin: 14px 0 14px;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.42;
  font-weight: 900;
  color: var(--mist-100);
}

.page-about .roles-col > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
}

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

.page-about .roles-list li {
  padding-top: 12px;
  border-top: 1px solid var(--line-faint);
  font-size: 14px;
  line-height: 1.75;
  color: var(--cyan-200);
}

.page-about .roles-note {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-left: clamp(16px, 2vw, 24px);
  border-left: 3px solid var(--orange-500);
  max-width: 52em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-100);
}

/* ---------- 合作生态 ---------- */

.page-about .eco-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(30px, 4vw, 48px);
}

@media (min-width: 760px) {
  .page-about .eco-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .eco-stat {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1.5px solid var(--line-mid);
  background: linear-gradient(158deg, rgba(20, 83, 68, .92), rgba(6, 35, 28, .96));
  box-shadow: var(--shadow-hard-sm);
}

.page-about .eco-value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.8vw, 42px);
  line-height: 1;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}

.page-about .eco-label {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-100);
}

.page-about .partner-title {
  margin: clamp(36px, 5vw, 56px) 0 0;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.45;
  font-weight: 900;
  color: var(--mist-100);
}

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

@media (min-width: 640px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .partner-cell {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px;
  border: 1.5px solid var(--line-soft);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .partner-cell:hover {
  border-color: var(--cyan-400);
  background: rgba(20, 83, 68, .55);
}

.page-about .partner-cell strong {
  font-size: 15px;
  font-weight: 900;
  color: var(--mist-100);
}

.page-about .partner-cell span {
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-400);
}

/* ---------- 收束 ---------- */

.page-about .about-cta-inner {
  display: grid;
  gap: clamp(30px, 4vw, 48px);
}

.page-about .about-cta-copy > p {
  margin: 18px 0 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-cta-media {
  margin: 0;
  border: 2px solid var(--line-mid);
  box-shadow: var(--shadow-hard);
}

@media (min-width: 1000px) {
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season-body,
  .page-about .season-body::after,
  .page-about .season-jump a,
  .page-about .flow-step,
  .page-about .partner-cell,
  .page-about .about-stat {
    transition: none;
  }
  .page-about .season-body:hover {
    transform: none;
  }
}