.page-about {
  --about-section-y: clamp(48px, 8vw, 96px);
  --about-gap: clamp(24px, 4vw, 44px);
  background: var(--c-paper);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: .35em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--step--1);
  color: var(--text-on-dark-soft);
  letter-spacing: .02em;
}

.page-about .about-crumb a {
  color: var(--text-on-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--line-dark);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  border-bottom-color: var(--c-spring);
  color: var(--c-spring);
}

.page-about .about-crumb li + li::before {
  content: "/";
  margin-right: .35em;
  color: var(--c-rock);
}

.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(115% 85% at 10% 0%, rgba(91, 127, 90, .44), transparent 62%),
    radial-gradient(95% 75% at 100% 100%, rgba(62, 111, 163, .3), transparent 62%),
    var(--c-field);
  color: var(--text-on-dark);
  padding-bottom: clamp(44px, 7vw, 92px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -32% -10%;
  height: 55%;
  background: radial-gradient(60% 100% at 50% 0%, rgba(228, 255, 154, .1), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(30px, 5vw, 54px);
  padding-top: clamp(26px, 4vw, 44px);
}

.page-about .about-hero-copy .section-label {
  margin: 0 0 14px;
  color: var(--c-spring);
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: var(--step-5);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
  max-width: 15em;
}

.page-about .about-lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: var(--step-1);
  line-height: 1.78;
  color: var(--text-on-dark-soft);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 18px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 14px 0 2px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.65rem, 1.2rem + 1.6vw, 2.15rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-score);
}

.page-about .about-stat-key {
  font-size: var(--step--1);
  letter-spacing: .04em;
  color: var(--text-on-dark-soft);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-hero-figure {
  margin: 0;
  align-self: end;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-dark);
  filter: saturate(.92) contrast(1.04);
}

.page-about .about-hero-figure .media-caption {
  margin: .8em 0 0;
  font-size: var(--step--1);
  color: var(--text-on-dark-soft);
}

.page-about .about-index {
  background: var(--c-paper-dim);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 0;
  padding: 16px 0;
  list-style: none;
}

.page-about .about-index-list a {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  color: var(--text);
  font-size: var(--step--1);
  font-weight: 700;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  background: var(--c-field);
  border-color: var(--c-field);
  color: var(--text-on-dark);
}

.page-about .about-chapter {
  padding: var(--about-section-y) 0;
}

.page-about .about-chapter--paper {
  background: var(--c-paper);
}

.page-about .about-chapter--dim {
  background: var(--c-paper-dim);
}

.page-about .about-chapter--field {
  background: var(--c-field);
  color: var(--text-on-dark);
}

.page-about .chapter-head {
  max-width: 44em;
}

.page-about .chapter-head .section-label {
  display: block;
  margin: 0 0 14px;
}

.page-about .about-chapter--field .section-label {
  color: var(--c-spring);
}

.page-about .chapter-head h2 {
  margin: 0;
  font-size: var(--step-4);
  line-height: 1.16;
  letter-spacing: -.01em;
  font-weight: 800;
}

.page-about .chapter-lead {
  margin: 18px 0 0;
  font-size: var(--step-1);
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .about-chapter--field .chapter-lead {
  color: var(--text-on-dark-soft);
}

/* 内容方法 */
.page-about .method-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .method-item {
  padding: 24px 22px 26px;
  background: var(--c-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--c-spring);
  border-radius: var(--radius-lg);
  transition: transform var(--dur-slow) var(--ease), box-shadow var(--dur-slow) var(--ease);
}

.page-about .method-item:nth-child(2) {
  border-top-color: var(--c-summer);
}

.page-about .method-item:nth-child(3) {
  border-top-color: var(--c-autumn);
}

.page-about .method-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(14, 43, 36, .09);
}

.page-about .method-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-rock);
  margin-bottom: 10px;
}

.page-about .method-item h3 {
  margin: 0 0 10px;
  font-size: var(--step-2);
  font-weight: 700;
  line-height: 1.3;
}

.page-about .method-item p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.78;
  color: var(--text-soft);
}

/* 覆盖版图 */
.page-about .league-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .league-chip {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: .05em;
  border: 1px solid currentColor;
}

.page-about .league-chip--spring {
  color: var(--c-spring);
  background: rgba(123, 201, 111, .12);
}

.page-about .league-chip--summer {
  color: var(--c-summer);
  background: rgba(240, 138, 60, .13);
}

.page-about .league-chip--autumn {
  color: var(--c-autumn);
  background: rgba(217, 164, 65, .13);
}

.page-about .league-chip--winter {
  color: var(--c-winter);
  background: rgba(62, 111, 163, .22);
}

.page-about .coverage-figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .coverage-cell {
  padding: 20px 18px;
  border-radius: var(--radius-md);
  background: rgba(247, 241, 228, .06);
  border: 1px solid var(--line-dark);
}

.page-about .coverage-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.8rem, 1.4rem + 1.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-score);
}

.page-about .coverage-key {
  display: block;
  margin-top: 9px;
  font-size: var(--step--1);
  color: var(--text-on-dark-soft);
}

.page-about .coverage-note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  max-width: 44em;
  font-size: var(--step-0);
  line-height: 1.82;
  color: var(--text-on-dark-soft);
}

/* 编辑台 */
.page-about .figure-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .figure-cell {
  padding: 18px;
  border-radius: var(--radius-md);
  background: var(--c-card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--c-clay);
}

.page-about .figure-cell:nth-child(2) {
  border-left-color: var(--c-autumn);
}

.page-about .figure-cell:nth-child(3) {
  border-left-color: var(--c-summer);
}

.page-about .figure-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 1.95rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text);
}

.page-about .figure-plus {
  color: var(--c-clay);
}

.page-about .figure-key {
  display: block;
  margin-top: 8px;
  font-size: var(--step--1);
  color: var(--text-soft);
}

.page-about .desk-grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(28px, 4vw, 44px);
}

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

.page-about .desk-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .desk-figure .media-caption {
  margin: .75em 0 0;
  font-size: var(--step--1);
  color: var(--text-soft);
}

.page-about .desk-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .desk-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-about .desk-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .step-num {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 700;
  color: var(--c-clay);
  padding-top: .4em;
}

.page-about .desk-step h4 {
  margin: 0 0 5px;
  font-size: var(--step-1);
  font-weight: 700;
}

.page-about .desk-step p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.72;
  color: var(--text-soft);
}

.page-about .role-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role-list li {
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  background: rgba(14, 43, 36, .07);
  font-size: var(--step--1);
  font-weight: 700;
  color: var(--text);
}

/* 赛季时间轴 */
.page-about .season-track {
  position: relative;
  display: grid;
  gap: 16px;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .season-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-spring), var(--c-summer), var(--c-autumn), var(--c-winter));
}

.page-about .season-node {
  position: relative;
  padding: 18px 20px 20px;
  border-radius: var(--radius-md);
  background: rgba(247, 241, 228, .05);
  border: 1px solid var(--line-dark);
  outline: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-about .season-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 22px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--c-field);
  border: 2px solid var(--node-accent, var(--c-spring));
}

.page-about .season-node--spring {
  --node-accent: var(--c-spring);
}

.page-about .season-node--summer {
  --node-accent: var(--c-summer);
}

.page-about .season-node--autumn {
  --node-accent: var(--c-autumn);
}

.page-about .season-node--winter {
  --node-accent: var(--c-winter);
}

.page-about .season-node:hover,
.page-about .season-node:focus-visible {
  background: rgba(247, 241, 228, .1);
  border-color: var(--node-accent, var(--c-spring));
  transform: translateX(3px);
}

.page-about .season-node:focus-visible {
  box-shadow: 0 0 0 2px var(--c-field), 0 0 0 4px var(--c-score);
}

.page-about .season-year {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--node-accent, var(--c-spring));
  margin-bottom: 8px;
}

.page-about .season-title {
  margin: 0 0 8px;
  font-size: var(--step-2);
  font-weight: 700;
  line-height: 1.32;
  color: var(--text-on-dark);
}

.page-about .season-summary {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.76;
  color: var(--text-on-dark-soft);
}

/* 合作生态 */
.page-about .eco-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .eco-card {
  padding: 22px 20px 24px;
  border-radius: var(--radius-lg);
  background: var(--c-card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--c-moss);
  transition: transform var(--dur-slow) var(--ease), box-shadow var(--dur-slow) var(--ease);
}

.page-about .eco-card--summer {
  border-left-color: var(--c-summer);
}

.page-about .eco-card--winter {
  border-left-color: var(--c-winter);
}

.page-about .eco-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(14, 43, 36, .09);
}

.page-about .eco-card h3 {
  margin: 0 0 10px;
  font-size: var(--step-2);
  font-weight: 700;
}

.page-about .eco-card p {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .eco-credit {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 34px);
  padding: 20px 22px;
  border-radius: var(--radius-lg);
  background: var(--c-paper-dim);
  border: 1px solid var(--line);
}

.page-about .eco-credit p {
  flex: 1 1 260px;
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.78;
  color: var(--text);
}

.page-about .eco-contact {
  margin: 20px 0 0;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .eco-contact a {
  color: var(--c-clay);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .eco-contact a:hover,
.page-about .eco-contact a:focus-visible {
  color: var(--c-field);
}

/* 团队 */
.page-about .team-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .team-figure {
  margin: 0;
  order: -1;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .team-figure .media-caption {
  margin: .75em 0 0;
  font-size: var(--step--1);
  color: var(--text-soft);
}

.page-about .team-body .section-label {
  display: block;
  margin: 0 0 12px;
}

.page-about .team-body h2 {
  margin: 0 0 16px;
  font-size: var(--step-3);
  line-height: 1.2;
  font-weight: 800;
}

.page-about .team-body p {
  margin: 0 0 14px;
  font-size: var(--step-0);
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .team-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* 结尾召唤 */
.page-about .about-cta {
  background:
    radial-gradient(90% 120% at 0% 0%, rgba(91, 127, 90, .4), transparent 60%),
    var(--c-field);
  color: var(--text-on-dark);
  padding: clamp(44px, 7vw, 80px) 0;
}

.page-about .about-cta-inner {
  display: grid;
  gap: 24px;
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-size: var(--step-3);
  line-height: 1.22;
  font-weight: 800;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 40em;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-on-dark-soft);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: end;
  }

  .page-about .about-cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: end;
  }

  .page-about .desk-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  }

  .page-about .team-figure {
    order: 2;
  }

  .page-about .season-node {
    padding: 20px 26px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .method-item,
  .page-about .eco-card,
  .page-about .season-node {
    transition: none;
  }

  .page-about .method-item:hover,
  .page-about .eco-card:hover,
  .page-about .season-node:hover,
  .page-about .season-node:focus-visible {
    transform: none;
  }
}