.page-about {
  --about-muted: rgba(23, 18, 13, 0.72);
  --about-soft: rgba(23, 18, 13, 0.13);
}

.page-about .about-zone--dark {
  --about-muted: rgba(255, 255, 255, 0.7);
  --about-soft: rgba(255, 255, 255, 0.16);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 1.5rem 0 2.75rem;
}

.page-about .about-hero .breadcrumb {
  margin: 0 0 1.75rem;
}

.page-about .hero-grid {
  display: grid;
  gap: 2.25rem;
}

.page-about .hero-copy .index-label {
  margin: 0 0 1rem;
  color: var(--amber);
}

.page-about .hero-copy .display {
  margin: 0 0 1.1rem;
  max-width: 15ch;
}

.page-about .hero-copy .lede {
  margin: 0 0 1.7rem;
  max-width: 54ch;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .hero-actions {
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-about .hero-fact {
  padding: 1.1rem 1.05rem 1.2rem;
  background: var(--cobalt-deep);
}

.page-about .hero-fact strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-fact span {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.6);
}

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 2rem 0 4rem;
  }
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3.75rem;
    align-items: end;
  }
}

/* ---------- 正文骨架 ---------- */
.page-about .about-band {
  padding: 2.75rem 0 3.5rem;
}

.page-about .about-body {
  display: grid;
  gap: 2.25rem;
}

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

@media (min-width: 900px) {
  .page-about .about-band {
    padding: 4.5rem 0 5.5rem;
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 4.5rem;
    align-items: start;
  }
}

/* ---------- 左栏索引 ---------- */
.page-about .about-index__title {
  margin: 0 0 0.8rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--about-muted);
}

.page-about .about-index ol {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.4rem;
  list-style: none;
  overflow-x: auto;
}

.page-about .about-index a {
  display: block;
  white-space: nowrap;
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--about-soft);
  border-radius: 999px;
  font-size: 0.79rem;
  color: var(--about-muted);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--ink);
  border-color: var(--ink);
}

@media (min-width: 1040px) {
  .page-about .about-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-index ol {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--about-soft);
  }

  .page-about .about-index a {
    position: relative;
    border: 0;
    border-radius: 0;
    padding: 0.5rem 0 0.5rem 1.1rem;
    white-space: normal;
    line-height: 1.35;
  }

  .page-about .about-index a::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 2px;
    height: 0;
    background: var(--flame);
    transform: translateY(-50%);
    transition: height 0.24s var(--ease);
  }

  .page-about .about-index a:hover::before,
  .page-about .about-index a:focus-visible::before {
    height: 1.5rem;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  scroll-margin-top: 108px;
}

.page-about .about-chapter + .about-chapter {
  margin-top: 3.25rem;
}

.page-about .about-chapter .index-label {
  margin: 0 0 0.7rem;
  color: var(--flame-ink);
}

.page-about .about-chapter .h-section {
  margin: 0 0 1.15rem;
  max-width: 26ch;
}

.page-about .chapter-lede {
  margin: 0 0 1.6rem;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .chapter-text.prose p {
  margin: 0 0 1.05rem;
  max-width: 66ch;
  color: var(--about-muted);
}

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

.page-about .chapter-text.prose strong {
  color: var(--ink);
  font-weight: 600;
}

.page-about .chapter-links {
  margin: 1.25rem 0 0;
}

.page-about .link-more {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--cobalt-lift);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .link-more:hover,
.page-about .link-more:focus-visible {
  color: var(--flame-ink);
}

@media (min-width: 900px) {
  .page-about .about-chapter + .about-chapter {
    margin-top: 5rem;
  }
}

/* ---------- 分栏 ---------- */
.page-about .chapter-split {
  display: grid;
  gap: 1.75rem;
  margin-top: 0.4rem;
}

@media (min-width: 880px) {
  .page-about .chapter-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 2.75rem;
    align-items: start;
  }
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

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

.page-about .about-figure--flow {
  max-width: 860px;
  margin-top: 2rem;
}

.page-about .about-figure--panel {
  box-shadow: none;
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1.5rem;
  margin: 2.25rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-soft);
}

.page-about .about-stats li {
  padding: 1.1rem 0 1.15rem;
  border-bottom: 1px solid var(--about-soft);
}

.page-about .about-stats strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.6vw, 1.8rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cobalt);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stats span {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--about-muted);
}

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 团队分工 ---------- */
.page-about .crew-list {
  display: grid;
  gap: 1.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .crew-item {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--about-soft);
}

.page-about .crew-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .crew-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.page-about .crew-role {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.page-about .crew-count {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--about-muted);
}

.page-about .crew-count .num {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .crew-bar {
  position: relative;
  height: 6px;
  margin: 0.7rem 0 0.65rem;
  border-radius: 999px;
  background: var(--about-soft);
  overflow: hidden;
}

.page-about .crew-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
}

.page-about .crew-item--data .crew-bar span {
  width: 24%;
  background: var(--amber);
}

.page-about .crew-item--venue .crew-bar span {
  width: 16%;
  background: var(--flame);
}

.page-about .crew-item--tech .crew-bar span {
  width: 29%;
  background: var(--cobalt-lift);
}

.page-about .crew-item--ops .crew-bar span {
  width: 31%;
  background: var(--pitch);
}

.page-about .crew-note {
  margin: 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--about-muted);
}

.page-about .crew-item:hover .crew-role {
  color: var(--flame-ink);
}

.page-about .crew-item:hover .crew-note {
  color: var(--ink);
}

/* ---------- 内容流程 ---------- */
.page-about .flow-steps {
  margin: 0.6rem 0 0 0.5rem;
  padding: 0 0 0 1.5rem;
  list-style: none;
  border-left: 1px solid var(--about-soft);
}

.page-about .flow-step {
  position: relative;
  padding-bottom: 1.9rem;
}

.page-about .flow-step:last-child {
  padding-bottom: 0;
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.5rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--flame);
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.16);
}

.page-about .flow-step__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--about-muted);
}

.page-about .flow-step h3 {
  margin: 0.3rem 0 0.5rem;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--ink);
}

.page-about .flow-step p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--about-muted);
}

/* ---------- 覆盖与协作 ---------- */
.page-about .about-panel--dark {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.5rem;
  padding: 1.5rem 1.25rem 1.75rem;
  border-radius: var(--radius-lg);
  background: var(--pitch);
  box-shadow: var(--shadow-soft);
  --about-muted: rgba(255, 255, 255, 0.76);
  --about-soft: rgba(255, 255, 255, 0.2);
}

.page-about .about-panel--dark p {
  margin: 0 0 1rem;
  max-width: 60ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .about-panel--dark p:last-of-type {
  margin-bottom: 1.4rem;
}

.page-about .city-dots {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
}

.page-about .city-dots .node {
  fill: var(--cyan);
  opacity: 0.55;
}

.page-about .city-dots .hub {
  fill: var(--flame);
}

@media (min-width: 880px) {
  .page-about .about-panel--dark {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 2.5rem;
    align-items: center;
    padding: 2.25rem;
  }
}

/* ---------- 纠错联系块 ---------- */
.page-about .contact-strip {
  padding: 1.4rem 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--cobalt);
  color: rgba(255, 255, 255, 0.78);
  --about-muted: rgba(255, 255, 255, 0.68);
  --about-soft: rgba(255, 255, 255, 0.16);
}

.page-about .contact-strip .index-label {
  margin: 0 0 0.75rem;
  color: var(--amber);
}

.page-about .contact-strip__mail {
  margin: 0 0 0.9rem;
  font-size: clamp(0.96rem, 2.6vw, 1.12rem);
  font-weight: 700;
  color: #fff;
  word-break: break-all;
}

.page-about .contact-strip__note {
  margin: 0.9rem 0 0;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--about-muted);
}

/* ---------- 合作方向 ---------- */
.page-about .coop-tabs {
  margin-top: 1.6rem;
}

.page-about .coop-tabs .pill-row {
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .coop-panel {
  margin-top: 1.35rem;
  padding: 1.4rem 1.25rem 1.5rem;
  border: 1px solid var(--about-soft);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.6);
}

.page-about .coop-panel h3 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--ink);
}

.page-about .coop-panel p {
  margin: 0 0 1rem;
  max-width: 62ch;
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .coop-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .coop-list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--about-muted);
}

.page-about .coop-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--flame);
}

.page-about .coop-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius-lg);
  background: var(--cobalt-deep);
  color: rgba(255, 255, 255, 0.82);
}

.page-about .coop-cta p {
  margin: 0;
  max-width: 52ch;
  font-size: 0.95rem;
  line-height: 1.7;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .about-index a::before,
  .page-about .crew-role,
  .page-about .crew-note {
    transition: none;
  }
}