.page-about {
  --ab-max: 1180px;
  --ab-gap: 24px;
  --ab-year-col: 64px;
}

.page-about .ab-wrap {
  width: 100%;
  max-width: var(--ab-max);
  margin: 0 auto;
  padding: 26px var(--pad) 76px;
}

/* 面包屑 */
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--fog);
  margin-bottom: 26px;
}
.page-about .crumbs a { color: var(--fog); text-decoration: none; }
.page-about .crumbs a:hover { color: var(--lime); }
.page-about .crumbs__sep { color: var(--grid); }
.page-about .crumbs [aria-current="page"] { color: var(--paper); }

/* 首屏 */
.page-about .ab-hero {
  display: grid;
  gap: 30px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--grid);
}
.page-about .ab-hero__kicker {
  color: var(--lime);
  margin: 0 0 14px;
}
.page-about .ab-hero__title {
  margin: 0 0 18px;
  font-family: var(--display);
  font-size: clamp(30px, 5.4vw, 46px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
  transform: skewX(-2deg);
  transform-origin: left bottom;
  max-width: 20ch;
}
.page-about .ab-hero__lead {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--paper);
  opacity: .9;
  max-width: 62ch;
}
.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .ab-index {
  border: 1px solid var(--grid);
  background: rgba(28, 39, 36, .5);
  padding: 16px 18px 10px;
}
.page-about .ab-index__title {
  margin: 0 0 10px;
  color: var(--fog);
}
.page-about .ab-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .ab-index__list li { border-top: 1px dashed var(--grid-soft); }
.page-about .ab-index__list li:first-child { border-top: 0; }
.page-about .ab-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  transition: color .18s var(--ease);
}
.page-about .ab-index__list a:hover { color: var(--lime); }
.page-about .ab-index__list .mono {
  font-size: 11px;
  color: var(--lime);
  letter-spacing: .06em;
}

/* 章节通用 */
.page-about .ab-sec {
  margin-top: 62px;
  padding-top: 22px;
  border-top: 1px solid var(--grid);
}
.page-about .ab-sec__head { margin-bottom: 30px; }
.page-about .ab-sec__head .label {
  color: var(--amber);
  margin: 0 0 10px;
}
.page-about .ab-sec__title {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: clamp(23px, 3.6vw, 33px);
  line-height: 1.2;
  letter-spacing: -.005em;
  color: var(--paper);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}
.page-about .ab-sec__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}
.page-about .ab-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 245, 66, .45);
  padding-bottom: 1px;
}
.page-about .ab-link:hover { border-bottom-color: var(--lime); }

/* 时间轴 */
.page-about .tl { position: relative; padding-top: 4px; }
.page-about .tl::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--grid);
}
.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--ab-year-col) minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 26px;
}
.page-about .tl-year {
  position: relative;
  padding-top: 2px;
}
.page-about .tl-year::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--lime);
  z-index: 1;
}
.page-about .tl-year__num {
  display: block;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--lime);
  letter-spacing: .02em;
}
.page-about .tl-year__tag {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--fog-dim);
  line-height: 1.4;
}

.page-about .tl-body {
  border: 1px solid var(--grid);
  background: var(--board);
  padding: 0 14px;
}
.page-about .tl-body > summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 0;
  cursor: pointer;
  list-style: none;
}
.page-about .tl-body > summary::-webkit-details-marker { display: none; }
.page-about .tl-body > summary::marker { content: ""; }
.page-about .tl-title {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--paper);
}
.page-about .tl-toggle {
  flex: none;
  font-family: var(--mono);
  font-size: 16px;
  color: var(--lime);
}
.page-about .tl-toggle::after { content: "+"; }
.page-about .tl-body[open] .tl-toggle::after { content: "-"; }
.page-about .tl-body[open] { border-color: rgba(200, 245, 66, .38); }
.page-about .tl-text {
  padding: 0 0 16px;
  border-top: 1px solid var(--grid-soft);
}
.page-about .tl-text p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

/* 图片 */
.page-about .ab-fig {
  margin: 0 0 26px;
  border: 1px solid var(--grid);
  background: var(--board);
  overflow: hidden;
}
.page-about .ab-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.86) contrast(1.05);
}
.page-about .ab-fig__cap {
  padding: 9px 12px;
  border-top: 1px solid var(--grid-soft);
  font-size: 11.5px;
  letter-spacing: .05em;
  line-height: 1.6;
  color: var(--fog-dim);
}
.page-about .ab-fig--wide img { aspect-ratio: 2 / 1; }
.page-about .ab-fig--tall img { aspect-ratio: 7 / 9; }

/* 版本现状 */
.page-about .ab-evo {
  display: grid;
  gap: 18px;
  padding-top: 4px;
}
.page-about .ab-evo .ab-fig { margin-bottom: 0; }
.page-about .ab-evo__title {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--paper);
  font-weight: 600;
}
.page-about .ab-evo__text p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

/* 团队 */
.page-about .team-split {
  display: grid;
  gap: 28px;
}
.page-about .role-table {
  border-top: 1px solid var(--grid);
}
.page-about .role-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 12px;
  padding: 13px 10px;
  border-bottom: 1px solid var(--grid-soft);
  transition: background .18s var(--ease);
}
.page-about .role-row:hover { background: rgba(200, 245, 66, .06); }
.page-about .role-row__name {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--paper);
}
.page-about .role-row__count {
  font-size: 15px;
  color: var(--lime);
}
.page-about .role-row__note {
  grid-column: 1 / -1;
  margin-top: 2px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fog);
}
.page-about .role-row--sum {
  border-bottom: 1px solid var(--grid);
  background: rgba(28, 39, 36, .6);
}
.page-about .role-row--sum:hover { background: rgba(28, 39, 36, .6); }

.page-about .team-side {
  display: grid;
  gap: 16px;
}
.page-about .ab-side-note {
  border-left: 2px solid var(--amber);
  padding: 4px 0 4px 14px;
}
.page-about .ab-side-note .label {
  color: var(--amber);
  margin: 0 0 6px;
}
.page-about .ab-side-note p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--fog);
}

/* 流程示意 */
.page-about .ab-flow {
  margin: 0 0 22px;
  max-width: 640px;
}
.page-about .ab-flow svg {
  display: block;
  width: 100%;
  height: auto;
}

/* 分段控件 */
.page-about .tabset { margin-top: 6px; }
.page-about .tabset__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.page-about .tabset__tab {
  appearance: none;
  font-family: inherit;
  font-size: 13.5px;
  letter-spacing: .02em;
  padding: 9px 14px;
  color: var(--fog);
  background: var(--board);
  border: 1px solid var(--grid);
  border-radius: 0;
  cursor: pointer;
  transition: color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}
.page-about .tabset__tab:hover { color: var(--paper); border-color: var(--grid); }
.page-about .tabset__tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
  font-weight: 600;
}
.page-about .tabset__tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-about .tabset__panel {
  margin-top: -1px;
  border: 1px solid var(--grid);
  background: var(--board);
  padding: 18px 16px;
}
.page-about .step-title {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--paper);
}
.page-about .tabset__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
  max-width: 60ch;
}

/* 栏目清单 */
.page-about .ab-cols { border-top: 1px solid var(--grid); }
.page-about .ab-colrow {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 6px 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--grid-soft);
  align-items: start;
}
.page-about .ab-colrow__idx {
  font-size: 13px;
  color: var(--amber);
  padding-top: 3px;
}
.page-about .ab-colrow__title {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--paper);
  font-weight: 600;
}
.page-about .ab-colrow__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--fog);
}
.page-about .ab-colrow .tag {
  grid-column: 2 / -1;
  justify-self: start;
  margin-top: 8px;
}

/* 球队库 */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  margin-bottom: 26px;
}
.page-about .ab-stat {
  background: var(--ink);
  padding: 16px 14px;
}
.page-about .ab-stat__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.1;
  color: var(--lime);
}
.page-about .ab-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--fog);
}

.page-about .ab-fields { border-top: 1px solid var(--grid); }
.page-about .ab-field {
  display: grid;
  gap: 3px;
  padding: 13px 0;
  border-bottom: 1px solid var(--grid-soft);
}
.page-about .ab-field__k {
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}
.page-about .ab-field__v {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--fog);
}
.page-about .ab-after {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--fog);
}

/* 合作 */
.page-about .ab-duo {
  display: grid;
  gap: 16px;
}
.page-about .ab-duo__card {
  background: var(--board);
  border: 1px solid var(--grid);
  padding: 20px 18px 16px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.page-about .ab-duo__card .label {
  color: var(--cyan);
  margin: 0 0 8px;
}
.page-about .ab-duo__title {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: 21px;
  color: var(--paper);
  letter-spacing: -.005em;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}
.page-about .ab-duo__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--fog);
}
.page-about .ab-duo__foot {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 1px solid var(--grid-soft);
  font-size: 14px;
}

/* 地区服务 */
.page-about .ab-region {
  display: grid;
  gap: 24px;
}
.page-about .ab-region__nums {
  display: grid;
  gap: 14px;
}
.page-about .ab-region__num {
  border-left: 2px solid var(--lime);
  padding-left: 14px;
}
.page-about .ab-region__num .mono {
  display: block;
  font-size: clamp(22px, 5vw, 30px);
  color: var(--lime);
  line-height: 1.2;
}
.page-about .ab-region__num p {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fog);
}
.page-about .ab-region__text p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}
.page-about .ab-region__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* 平板与桌面 */
@media (min-width: 700px) {
  .page-about .ab-colrow {
    grid-template-columns: 40px minmax(0, 1fr) auto;
    gap: 6px 18px;
    align-items: baseline;
  }
  .page-about .ab-colrow .tag {
    grid-column: auto;
    margin-top: 0;
    justify-self: end;
  }
  .page-about .ab-field {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
  .page-about .ab-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .tabset__panel { padding: 22px 22px; }
  .page-about .tl-body { padding: 0 20px; }
}

@media (min-width: 900px) {
  .page-about { --ab-year-col: 108px; }
  .page-about .ab-wrap { padding-top: 34px; }

  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(240px, .75fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .tl::before { left: 99px; }
  .page-about .tl-year { text-align: right; padding-right: 26px; }
  .page-about .tl-year::after { left: auto; right: 4px; top: 8px; }
  .page-about .tl-year__num { font-size: 26px; line-height: 1.1; }
  .page-about .tl-year__tag { margin-top: 8px; }
  .page-about .tl-item { gap: 26px; padding-bottom: 30px; }
  .page-about .tl-body > summary { padding: 16px 0; }
  .page-about .tl-title { font-size: 18px; }

  .page-about .ab-evo {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    gap: 36px;
    align-items: start;
  }
  .page-about .role-row { padding: 15px 12px; }
  .page-about .role-row__note {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition: max-height .22s var(--ease), opacity .22s var(--ease), margin-top .22s var(--ease);
  }
  .page-about .role-row:hover .role-row__note,
  .page-about .role-row:focus-within .role-row__note {
    max-height: 90px;
    opacity: 1;
    margin-top: 4px;
  }
  .page-about .role-row--sum .role-row__note { max-height: none; opacity: 1; margin-top: 4px; }

  .page-about .ab-duo { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
  .page-about .ab-region {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .ab-region__nums { gap: 22px; }
}

@media (min-width: 1100px) {
  .page-about .ab-hero__lead { font-size: 17px; }
  .page-about .tl { padding-left: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-row,
  .page-about .role-row__note,
  .page-about .tabset__tab,
  .page-about .ab-index__list a {
    transition: none;
  }
}