.page-about {
  --about-arena-line: rgba(255, 106, 26, .45);
  --about-hair: rgba(185, 194, 208, .5);
  --about-invert-muted: rgba(247, 249, 252, .74);
}

/* ---------- 首屏 ---------- */
.page-about .about-lead {
  padding-block: clamp(96px, 15vw, 168px) clamp(44px, 7vw, 84px);
}
.page-about .about-lead .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 44px);
}
.page-about .about-lead__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}
.page-about .about-lead__title {
  margin: 14px 0 0;
  font-family: var(--font-cond);
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--ice);
  max-width: 20em;
}
.page-about .about-lead__lede {
  margin: 20px 0 0;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--about-invert-muted);
}
.page-about .about-lead__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 0;
  padding: 24px;
  background: rgba(14, 20, 32, .62);
  border-left: 2px solid var(--arena);
  clip-path: var(--cut-corner);
}
.page-about .about-fact dt {
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(247, 249, 252, .6);
}
.page-about .about-fact dd {
  margin: 6px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 15px;
  color: var(--ice);
}
.page-about .about-fact .stat {
  color: var(--arena);
  font-size: 34px;
  line-height: 1;
}

/* ---------- 通用：章节头与列表 ---------- */
.page-about .section-head {
  max-width: 46rem;
  margin-bottom: clamp(28px, 4vw, 48px);
}
.page-about .section-head--dark .section-head__title {
  color: var(--ice);
}
.page-about .section-head--dark .section-head__note {
  color: var(--about-invert-muted);
}
.page-about .about-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}
.page-about .about-list .mono {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--electric-deep);
}

/* ---------- 01 起源 ---------- */
.page-about .about-origin__grid {
  align-items: start;
}
.page-about .about-origin__prose p + p {
  margin-top: 1.1em;
}
.page-about .about-origin__note {
  margin: 0;
}
.page-about .about-origin__note-line {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--about-hair);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 02 团队 ---------- */
.page-about .about-team__figure {
  margin: 0 0 clamp(28px, 4vw, 44px);
}
.page-about .about-frame-3-2 {
  aspect-ratio: 3 / 2;
}
.page-about .about-frame-2-1 {
  aspect-ratio: 2 / 1;
}
.page-about .about-frame-8-3 {
  aspect-ratio: 8 / 3;
}
.page-about .about-roster__bar {
  display: flex;
  gap: 4px;
  height: 14px;
  margin-bottom: 22px;
}
.page-about .about-roster__seg {
  height: 100%;
  clip-path: var(--cut-corner-sm);
}
.page-about .about-roster__seg--a { flex: 9 1 0; background: var(--arena); }
.page-about .about-roster__seg--b { flex: 8 1 0; background: var(--electric); }
.page-about .about-roster__seg--c { flex: 6 1 0; background: var(--score); }
.page-about .about-roster__seg--d { flex: 3 1 0; background: var(--line); }

.page-about .about-roster__scroller {
  overflow-x: auto;
  padding-bottom: 12px;
}
.page-about .about-roster__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(248px, 1fr);
  gap: 16px;
}
.page-about .about-role p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-invert-muted);
}

/* ---------- 03 版本 ---------- */
.page-about .about-versions__figure {
  margin: 0 0 clamp(32px, 5vw, 56px);
}
.page-about .about-verwrap {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}
.page-about .about-timeline {
  position: relative;
  padding-left: 30px;
  border-left: 2px solid var(--about-arena-line);
}
.page-about .about-ver {
  position: relative;
  margin-bottom: 16px;
}
.page-about .about-ver:last-child {
  margin-bottom: 0;
}
.page-about .about-ver::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 16px;
  width: 12px;
  height: 12px;
  background: var(--ice);
  border: 2px solid var(--electric);
  clip-path: var(--cut-corner-sm);
  transition: background-color .25s var(--ease), border-color .25s var(--ease);
}
.page-about .about-ver[open]::before {
  background: var(--arena);
  border-color: var(--arena);
}
.page-about .about-ver__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 10px 16px;
  cursor: pointer;
  list-style: none;
  background: var(--data);
  clip-path: var(--cut-corner-sm);
  border-left: 2px solid var(--arena);
}
.page-about .about-ver__sum::-webkit-details-marker {
  display: none;
}
.page-about .about-ver__year {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ink);
}
.page-about .about-ver__name {
  font-size: 15px;
  color: var(--muted);
}
.page-about .about-ver__hint {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--electric-deep);
}
.page-about .about-ver[open] .about-ver__hint {
  color: var(--arena);
}
.page-about .about-ver__body {
  padding: 16px 4px 4px 0;
}
.page-about .about-ver__body p {
  margin: 0 0 .9em;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}
.page-about .about-ver__body a {
  color: var(--electric-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-verindex {
  order: -1;
}
.page-about .about-verindex__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-about .about-verindex__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-verindex__link {
  display: inline-block;
  padding: 6px 12px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ink);
  background: var(--data);
  border-left: 2px solid var(--line);
  text-decoration: none;
  clip-path: var(--cut-corner-sm);
}
.page-about .about-verindex__link[aria-current="true"] {
  color: var(--ice);
  background: var(--night);
  border-left-color: var(--arena);
}

/* ---------- 04 选题 ---------- */
.page-about .about-editorial__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-about .about-rule {
  counter-increment: none;
}
.page-about .about-rule p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .about-rule a {
  color: var(--electric-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .about-editorial__foot {
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--about-hair);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}
.page-about .about-editorial__foot a {
  color: var(--electric-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 05 读者 ---------- */
.page-about .about-sky {
  margin: 0 0 clamp(28px, 4vw, 44px);
}
.page-about .about-audience__grid {
  align-items: start;
}
.page-about .about-device__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}
.page-about .about-device__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.page-about .about-device__name {
  font-size: 16px;
  color: var(--ice);
}
.page-about .about-device__val {
  font-size: 22px;
  color: var(--arena);
}
.page-about .about-device__track {
  margin-top: 10px;
  height: 10px;
  background: rgba(247, 249, 252, .12);
  clip-path: var(--cut-corner-sm);
}
.page-about .about-device__fill {
  display: block;
  height: 100%;
}
.page-about .about-device__fill--a { width: 78%; background: var(--arena); }
.page-about .about-device__fill--b { width: 15%; background: var(--electric); }
.page-about .about-device__fill--c { width: 7%; background: var(--score); }
.page-about .about-device__hint {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-invert-muted);
}
.page-about .about-region {
  padding: 24px;
  background: rgba(42, 28, 18, .55);
  border-left: 2px solid var(--score);
  clip-path: var(--cut-corner);
}
.page-about .about-region__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(247, 249, 252, .6);
}
.page-about .about-region__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-region__note {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-invert-muted);
}

/* ---------- 06 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: 18px;
}
.page-about .about-partner {
  margin: 0;
}
.page-about .about-partner--award {
  border-left-color: var(--score);
  background: var(--data);
}
.page-about .about-partner p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 07 入口 ---------- */
.page-about .about-join__grid {
  gap: 18px;
}
.page-about .about-join__item {
  display: block;
  text-decoration: none;
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.page-about .about-join__item p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-invert-muted);
}
.page-about .about-join__go {
  display: inline-block;
  margin-top: 16px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--arena);
}
.page-about .about-join__item:hover {
  transform: translateY(-3px);
}
.page-about .about-join__foot {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: 22px;
  border-top: 1px dashed rgba(185, 194, 208, .35);
  max-width: 52em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-invert-muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-editorial__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-editorial__list .about-rule:first-child {
    grid-column: 1 / -1;
  }
  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partner--award {
    grid-column: 1 / -1;
  }
  .page-about .about-verindex__list {
    flex-wrap: nowrap;
  }
}

@media (min-width: 900px) {
  .page-about .about-lead__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }
  .page-about .about-lead__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-roster__scroller {
    overflow-x: visible;
    padding-bottom: 0;
  }
  .page-about .about-roster__list {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-partner--award {
    grid-column: auto;
  }
}

@media (min-width: 1024px) {
  .page-about .about-verwrap {
    grid-template-columns: minmax(0, 1fr) 148px;
    align-items: start;
  }
  .page-about .about-verindex {
    order: 0;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    padding-left: 18px;
    border-left: 1px solid var(--about-hair);
  }
  .page-about .about-verindex__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 10px;
  }
  .page-about .about-verindex__link {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-join__item,
  .page-about .about-ver::before {
    transition: none;
  }
}