.page-about {
  --about-line: rgba(143, 167, 156, .26);
  --about-ink-line: rgba(36, 26, 19, .14);
  background: var(--ink-green);
  color: var(--paper);
}

.page-about .site-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 面包屑 ---------- */

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--mist);
  padding-top: 96px;
}

.page-about .breadcrumb-link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb-sep {
  color: rgba(143, 167, 156, .5);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(100, 240, 196, .13) 0%, rgba(8, 26, 20, 0) 58%),
    linear-gradient(168deg, var(--ink-green) 0%, var(--grass-deep) 58%, var(--ink-green) 100%);
  padding-bottom: 72px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(143, 167, 156, .07) 0 1px, transparent 1px 72px);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: 40px;
}

.page-about .about-hero-rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 8vw, 42px);
  line-height: 1.16;
  letter-spacing: -.03em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .annotation-vertical {
  color: var(--amber);
}

.page-about .about-lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(237, 229, 210, .88);
  max-width: 58ch;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 32px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-fact {
  background: rgba(8, 26, 20, .72);
  padding: 18px 20px 20px;
}

.page-about .about-fact .data-num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 7vw, 42px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-about .about-fact .data-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 通用章节 ---------- */

.page-about .about-section {
  position: relative;
  padding: 64px 0;
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.4vw, 34px);
  line-height: 1.22;
  letter-spacing: -.025em;
  color: inherit;
  text-wrap: balance;
}

.page-about .annotation {
  display: block;
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--score-orange);
}

.page-about .about-band-dark {
  background: var(--ink-green);
  color: var(--paper);
}

.page-about .about-band-deep {
  background: linear-gradient(180deg, var(--grass-deep) 0%, var(--ink-green) 100%);
  color: var(--paper);
}

.page-about .about-band-paper {
  background: var(--paper);
  color: var(--brown-ink);
}

.page-about .about-band-paper .about-h2,
.page-about .about-band-paper-light .about-h2 {
  color: var(--brown-ink);
}

.page-about .about-band-paper-light {
  background: var(--paper-light);
  color: var(--brown-ink);
}

.page-about .about-band-paper p,
.page-about .about-band-paper-light p {
  font-size: 16px;
  line-height: 1.78;
}

/* ---------- 起点 ---------- */

.page-about .origin-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .origin-lead {
  border-left: 3px solid var(--score-orange);
  padding-left: 18px;
}

.page-about .origin-body p + p {
  margin-top: 16px;
}

.page-about .origin-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-ink-line);
  border-top: 1px solid var(--about-ink-line);
}

.page-about .origin-list-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 4px;
  background: var(--paper);
}

.page-about .origin-list-index {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--score-orange);
  flex: none;
  min-width: 26px;
}

.page-about .origin-list-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--brown-ink);
}

/* ---------- 团队 ---------- */

.page-about .team-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .team-head-copy p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(237, 229, 210, .84);
  max-width: 56ch;
}

.page-about .team-figure {
  margin: 0;
  align-self: start;
}

.page-about .team-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.page-about .team-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 36px 0 20px;
}

.page-about .filter-btn {
  appearance: none;
  cursor: pointer;
  border: 1px solid var(--about-line);
  background: rgba(8, 26, 20, .6);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .04em;
  padding: 9px 18px;
  border-radius: 999px;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .filter-btn[aria-pressed="true"],
.page-about .filter-btn.is-active {
  color: var(--ink-green);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .team-card {
  position: relative;
  padding: 28px 22px 26px;
  background: rgba(8, 26, 20, .78);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-4px);
  border-color: rgba(100, 240, 196, .55);
}

.page-about .team-card-index {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-about .team-card-title {
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .team-card-count {
  display: block;
  font-size: 12.5px;
  color: var(--mist);
  margin-bottom: 16px;
}

.page-about .team-card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .team-card-item {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(237, 229, 210, .82);
}

.page-about .team-card-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--score-orange);
}

.page-about .is-hidden {
  display: none !important;
}

/* ---------- 流程 ---------- */

.page-about .flow-head {
  max-width: 62ch;
}

.page-about .flow-head p {
  color: rgba(36, 26, 19, .78);
}

.page-about .flow-bar {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .flow-step {
  position: relative;
  padding: 24px 20px 22px;
  background: #fff;
  border: 1px solid var(--about-ink-line);
  border-radius: var(--radius);
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .flow-step:hover,
.page-about .flow-step:focus-within {
  transform: translateY(-4px);
  border-color: var(--score-orange);
  box-shadow: 0 20px 32px -26px rgba(36, 26, 19, .6);
}

.page-about .flow-index {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  color: var(--grass-mid);
  letter-spacing: -.02em;
}

.page-about .flow-step:hover .flow-index,
.page-about .flow-step:focus-within .flow-index {
  color: var(--score-orange);
}

.page-about .flow-title {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--brown-ink);
}

.page-about .flow-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(36, 26, 19, .74);
}

/* ---------- 六个赛季 ---------- */

.page-about .season-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .season-figure {
  margin: 0;
  align-self: start;
}

.page-about .season-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.page-about .season-intro {
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(237, 229, 210, .82);
  max-width: 56ch;
}

.page-about .season-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 32px;
  position: relative;
}

.page-about .season-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber) 0%, rgba(255, 194, 75, .18) 100%);
}

.page-about .season-item {
  position: relative;
  margin-bottom: 12px;
}

.page-about .season-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--amber);
  background: var(--ink-green);
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .season-item:hover::before {
  background: var(--amber);
  transform: scale(1.14);
}

.page-about .season-node {
  background: rgba(18, 54, 42, .55);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .season-node[open] {
  background: rgba(18, 54, 42, .86);
  border-color: rgba(255, 194, 75, .42);
}

.page-about .season-summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
}

.page-about .season-summary::-webkit-details-marker {
  display: none;
}

.page-about .season-index {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--amber);
  flex: none;
}

.page-about .season-title {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .season-body {
  padding: 0 20px 18px;
}

.page-about .season-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(237, 229, 210, .8);
}

/* ---------- 共建与年鉴 ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .partner-copy p + p {
  margin-top: 16px;
}

.page-about .partner-metrics {
  display: grid;
  gap: 1px;
  background: var(--about-ink-line);
  border-top: 1px solid var(--about-ink-line);
  border-bottom: 1px solid var(--about-ink-line);
  align-self: start;
}

.page-about .partner-metric {
  background: var(--paper);
  padding: 20px 4px;
}

.page-about .partner-metric .data-num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  line-height: 1;
  color: var(--score-orange);
  letter-spacing: -.02em;
}

.page-about .partner-metric .data-label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(36, 26, 19, .72);
}

.page-about .partner-banner {
  margin: 40px 0 0;
}

.page-about .partner-banner img {
  border-radius: var(--radius);
}

/* ---------- 服务范围 ---------- */

.page-about .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

.page-about .service-item {
  padding: 22px 20px;
  background: rgba(8, 26, 20, .66);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--grass-mid);
  border-radius: var(--radius);
  transition: border-left-color .2s var(--ease);
}

.page-about .service-item:hover {
  border-left-color: var(--cyan);
}

.page-about .service-item-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .service-item-body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(237, 229, 210, .82);
}

.page-about .about-cta {
  margin-top: 40px;
  padding: 28px 24px;
  background: rgba(100, 240, 196, .07);
  border: 1px solid rgba(100, 240, 196, .3);
  border-radius: var(--radius);
  display: grid;
  gap: 20px;
}

.page-about .about-cta-text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(237, 229, 210, .88);
  max-width: 60ch;
}

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

.page-about .about-cta-actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  border-radius: 999px;
  text-decoration: none;
  transition: transform .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .btn-primary {
  background: var(--score-orange);
  color: #fff;
  border: 1px solid var(--score-orange);
}

.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: #ff7048;
  border-color: #ff7048;
  transform: translateY(-2px);
}

.page-about .btn-ghost {
  background: transparent;
  color: var(--cyan);
  border: 1px solid rgba(100, 240, 196, .5);
}

.page-about .btn-ghost:hover,
.page-about .btn-ghost:focus-visible {
  background: rgba(100, 240, 196, .12);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .site-shell {
    padding: 0 32px;
  }

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

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

  .page-about .flow-bar {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 900px) {
  .page-about .breadcrumb {
    padding-top: 112px;
  }

  .page-about .about-hero {
    padding-bottom: 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 64px;
    padding-top: 56px;
  }

  .page-about .about-hero-rail {
    flex-direction: row-reverse;
    align-items: flex-start;
    gap: 20px;
  }

  .page-about .about-title {
    writing-mode: vertical-rl;
    font-size: clamp(30px, 2.9vw, 40px);
    line-height: 1.08;
    letter-spacing: -.02em;
  }

  .page-about .annotation-vertical {
    writing-mode: vertical-rl;
    margin: 0;
    padding-top: 6px;
    letter-spacing: .22em;
  }

  .page-about .about-section {
    padding: 104px 0;
  }

  .page-about .origin-layout {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    gap: 56px;
  }

  .page-about .origin-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 1px 40px;
    background: transparent;
    border-top: none;
  }

  .page-about .origin-list-item {
    border-top: 1px solid var(--about-ink-line);
  }

  .page-about .team-head {
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 56px;
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .flow-bar {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .flow-step:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -11px;
    top: 50%;
    width: 7px;
    height: 7px;
    border-top: 2px solid var(--score-orange);
    border-right: 2px solid var(--score-orange);
    transform: translateY(-50%) rotate(45deg);
  }

  .page-about .season-layout {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .season-figure {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .season-track {
    padding-left: 40px;
  }

  .page-about .season-item::before {
    left: -40px;
  }

  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .68fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 32px 36px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-hero-grid {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 80px;
  }

  .page-about .about-lede {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}