.page-about {
  --about-stack: 40px;
}

.page-about .shell {
  padding-top: 24px;
  padding-bottom: 96px;
}

.page-about .breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-layout {
  display: grid;
  gap: 48px;
  min-width: 0;
}

.page-about .about-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 64px;
}

/* ---------- 首屏自述 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 32px 22px 30px;
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(to right, rgba(63, 224, 204, .06) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(to bottom, rgba(63, 224, 204, .06) 0 1px, transparent 1px 76px);
  pointer-events: none;
}

.page-about .about-hero > * {
  position: relative;
}

.page-about .about-hero .panel-label {
  position: absolute;
  top: 0;
  left: 22px;
  transform: translateY(-50%);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: var(--radius);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 28px;
  margin-top: 8px;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 6vw, 3.1rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--text);
  margin: 0 0 18px;
  max-width: 18ch;
}

.page-about .lede {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--cyan-soft);
  margin: 0 0 16px;
  max-width: 60ch;
}

.page-about .about-hero-copy p:not(.eyebrow):not(.lede) {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 66ch;
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 96px;
}

.page-about .stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .stat-label {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted-dim);
}

.page-about .about-hero-visual {
  margin: 0;
}

.page-about .img-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink);
}

.page-about .img-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.62) contrast(1.04);
}

.page-about .img-frame--16x9 img {
  aspect-ratio: 16 / 9;
}

.page-about .img-frame--3x2 img {
  aspect-ratio: 3 / 2;
}

.page-about .img-cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted-dim);
  max-width: 58ch;
}

/* ---------- 通用章节 ---------- */

.page-about .section {
  display: block;
}

.page-about .section-head {
  margin-bottom: 28px;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  line-height: 1.18;
  color: var(--text);
  margin: 0 0 10px;
  max-width: 26ch;
}

.page-about .section-meta {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  max-width: 62ch;
}

.page-about .about-body p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 68ch;
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 204, .35);
}

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

.page-about a.btn {
  border-bottom: none;
}

/* ---------- 两档分类 ---------- */

.page-about .classify-grid {
  align-items: start;
}

.page-about .classify-copy p {
  margin: 0 0 16px;
}

.page-about .check-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .check-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text);
  padding: 9px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .check-list .mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan);
  min-width: 2.6em;
}

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

/* ---------- 横向数据带 ---------- */

.page-about .band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 42, 34, .85), rgba(7, 26, 22, .85));
}

.page-about .band-inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  padding: 26px 20px;
}

.page-about .band-inner .stat {
  min-width: 0;
}

/* ---------- 团队分工 ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .team-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(0, 0, 0, .32);
  overflow: hidden;
  transition: border-color .18s ease;
}

.page-about .team-card[data-open="true"] {
  border-color: rgba(63, 224, 204, .5);
}

.page-about .team-trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 16px;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  font-family: var(--font-body);
}

.page-about .team-trigger:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .team-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--cyan);
  min-width: 2ch;
}

.page-about .team-head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  flex: 1 1 auto;
}

.page-about .team-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: .01em;
  color: var(--text);
}

.page-about .team-role {
  font-size: 12.5px;
  color: var(--muted-dim);
}

.page-about .accordion-icon {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .18s ease;
}

.page-about .team-card[data-open="true"] .accordion-icon,
.page-about .team-trigger[aria-expanded="true"] .accordion-icon {
  transform: rotate(-135deg);
}

.page-about .accordion-panel-inner {
  padding: 0 16px 20px;
  border-top: 1px solid var(--line-soft);
  border-left: 4px solid var(--cyan);
}

.page-about .duty-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .duty-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .duty-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  border-radius: 1px;
}

/* ---------- 质量与更正流程 ---------- */

.page-about .flow-line {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: flow;
}

.page-about .flow-step {
  position: relative;
  padding: 18px 18px 18px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .flow-step::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--cyan);
  transition: width .18s ease;
}

.page-about .flow-step:hover::after {
  width: 8px;
}

.page-about .flow-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .flow-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--text);
  margin: 0 0 8px;
}

.page-about .flow-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .quality-note {
  position: relative;
  padding: 28px 20px 22px;
  background: var(--panel);
}

.page-about .quality-note .panel-label {
  position: absolute;
  top: 0;
  left: 20px;
  transform: translateY(-50%);
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: var(--radius);
}

.page-about .quality-note p {
  margin: 0 0 14px;
}

.page-about .quality-note p:last-of-type {
  margin-bottom: 0;
}

.page-about .quality-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px !important;
}

.page-about .btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .01em;
}

.page-about .btn--ghost {
  border: 1px solid var(--line);
  color: var(--cyan-soft);
  background: transparent;
}

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

/* ---------- 合作生态 ---------- */

.page-about .partner-grid {
  display: grid;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .partner-card {
  position: relative;
  padding: 22px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(0, 0, 0, .3);
}

.page-about .partner-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 4px;
  height: 40px;
  background: var(--cyan);
}

.page-about .partner-card--ticket::before {
  background: var(--violet);
}

.page-about .partner-card--media::before {
  background: var(--amber);
}

.page-about .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  padding: 3px 9px;
  border-radius: 2px;
  margin-bottom: 14px;
}

.page-about .tag--live {
  background: rgba(63, 224, 204, .14);
  color: var(--cyan);
  border: 1px solid rgba(63, 224, 204, .4);
}

.page-about .tag--transfer {
  background: rgba(139, 92, 246, .16);
  color: #C4B0FB;
  border: 1px solid rgba(139, 92, 246, .45);
}

.page-about .tag--injury {
  background: rgba(240, 169, 59, .14);
  color: var(--amber);
  border: 1px solid rgba(240, 169, 59, .42);
}

.page-about .partner-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.16rem;
  color: var(--text);
  margin: 0 0 10px;
  padding-left: 12px;
}

.page-about .partner-title .mono {
  font-family: var(--font-mono);
  color: var(--cyan);
  margin-right: 4px;
}

.page-about .partner-card p {
  margin: 0;
  padding-left: 12px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .partner-foot {
  margin: 0;
}

/* ---------- 里程碑时间轴 ---------- */

.page-about .milestone-timeline {
  margin-bottom: 28px;
  padding: 22px 0 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .timeline-track {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(190px, 1fr);
  gap: 18px;
  padding: 26px 4px 8px;
  border-top: 1px dashed var(--line);
}

.page-about .timeline-item {
  position: relative;
  padding-top: 20px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  top: -33px;
  left: 0;
  width: 1px;
  height: 30px;
  background: var(--line);
}

.page-about .timeline-dot {
  position: absolute;
  top: -39px;
  left: -5px;
  width: 11px;
  height: 11px;
  background: var(--cyan);
  border: 2px solid var(--ink);
  border-radius: 1px;
}

.page-about .timeline-item[data-state="transfer"] .timeline-dot {
  background: var(--violet);
}

.page-about .timeline-item[data-state="live"] .timeline-dot {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(240, 169, 59, .18);
}

.page-about .timeline-label {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .timeline-item[data-state="transfer"] .timeline-label {
  color: #C4B0FB;
}

.page-about .timeline-item[data-state="live"] .timeline-label {
  color: var(--amber);
}

.page-about .timeline-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 30ch;
}

.page-about .milestone-figure {
  margin: 0 0 24px;
}

.page-about .milestone-figure .img-frame img {
  aspect-ratio: 4 / 1;
}

.page-about .milestone-foot {
  margin: 0;
}

/* ---------- 侧栏锚点导航 ---------- */

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

.page-about .anchor-nav {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 42, 34, .7);
  padding: 16px 16px 14px;
}

.page-about .anchor-nav-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--muted-dim);
  margin: 0 0 12px;
}

.page-about .anchor-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .anchor-nav-list a {
  display: block;
  padding: 7px 10px;
  font-size: 13.5px;
  color: var(--muted);
  border-bottom: none;
  border-left: 3px solid transparent;
  border-radius: 2px;
}

.page-about .anchor-nav-list a:hover,
.page-about .anchor-nav-list a:focus-visible {
  color: var(--cyan-soft);
  background: rgba(63, 224, 204, .07);
}

.page-about .anchor-nav-list a[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(63, 224, 204, .1);
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 700px) {
  .page-about .about-hero {
    padding: 40px 34px 36px;
  }

  .page-about .about-hero .panel-label {
    left: 34px;
  }

  .page-about .band-inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding: 30px 34px;
  }

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

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

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

  .page-about .quality-note {
    padding: 32px 28px 26px;
  }
}

@media (min-width: 1024px) {
  .page-about .shell {
    padding-bottom: 120px;
  }

  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) 226px;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-body {
    gap: 76px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .flow-line .flow-step:not(:last-child)::before {
    content: "";
    position: absolute;
    right: -12px;
    top: 34px;
    width: 12px;
    height: 1px;
    background: var(--line);
  }

  .page-about .classify-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 34px;
  }

  .page-about .milestone-timeline {
    overflow-x: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .accordion-icon,
  .page-about .flow-step::after {
    transition: none;
  }
}