.page-about {
  --ab-aside-bg: #0A1226;
  --ab-hair: rgba(140, 148, 166, .22);
  --ab-neon-dim: rgba(198, 255, 74, .16);
  --ab-track: rgba(30, 46, 85, .9);
}

/* ============ 首屏 ============ */
.page-about .ab-hero {
  position: relative;
  padding: clamp(28px, 5vw, 68px) 0 clamp(40px, 6vw, 88px);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  align-items: center;
}
@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}
.page-about .ab-hero__lead {
  min-width: 0;
}
.page-about .ab-hero__title {
  margin: 20px 0 0;
  font-size: clamp(32px, 6vw, 68px);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--paper);
}
.page-about .ab-hero__title .thin {
  display: block;
  font-weight: 200;
  color: var(--stone);
}
.page-about .ab-hero__strong {
  display: block;
  color: var(--paper);
  position: relative;
  padding-bottom: 12px;
}
.page-about .ab-hero__strong::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 84px;
  height: 3px;
  background: var(--neon);
}
.page-about .ab-hero__intro {
  margin: 22px 0 0;
  max-width: 48ch;
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--stone);
}
.page-about .ab-facts {
  margin: 34px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-hair);
  border-top: 1px solid var(--ab-hair);
  border-bottom: 1px solid var(--ab-hair);
}
@media (min-width: 640px) {
  .page-about .ab-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .ab-facts__item {
  background: var(--bg-0);
  padding: 16px 14px 18px;
  min-width: 0;
}
.page-about .ab-facts dt {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 22px);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
  color: var(--neon);
}
.page-about .ab-facts dd {
  margin: 8px 0 0;
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--stone);
}
.page-about .ab-hero__visual {
  min-width: 0;
  padding: clamp(12px, 2vw, 22px);
  background: var(--bg-1);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}
.page-about .ab-plot {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .ab-plot__grid {
  stroke: var(--line);
  opacity: .55;
}
.page-about .ab-plot__axis {
  stroke: var(--moss);
  stroke-width: 2;
  stroke-dasharray: 3 5;
}
.page-about .ab-plot__trace {
  fill: none;
  stroke-width: 2;
}
.page-about .ab-plot__trace--a {
  stroke: var(--neon);
}
.page-about .ab-plot__trace--b {
  stroke: var(--stone);
  stroke-dasharray: 7 6;
}
.page-about .ab-plot__mark {
  fill: var(--bg-0);
  stroke: var(--stone);
  stroke-width: 2;
}
.page-about .ab-plot__mark--now {
  fill: var(--neon);
  stroke: var(--neon);
}
.page-about .ab-plot__label {
  fill: var(--stone);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .1em;
}

/* ============ 主栏与侧栏 ============ */
.page-about .ab-res {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(40px, 6vw, 72px);
  padding: clamp(48px, 7vw, 96px) 0 clamp(56px, 8vw, 104px);
}
@media (min-width: 1000px) {
  .page-about .ab-res {
    grid-template-columns: minmax(0, 1fr) 302px;
    gap: clamp(48px, 5vw, 76px);
  }
}
.page-about .ab-res__main {
  min-width: 0;
}
.page-about .ab-sec {
  margin-bottom: clamp(56px, 8vw, 100px);
}
.page-about .ab-sec:last-child {
  margin-bottom: 0;
}
.page-about .ab-sec__head {
  max-width: 68ch;
}
.page-about .ab-sec__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.28;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--paper);
}
.page-about .ab-sec__lede {
  margin: 14px 0 0;
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--stone);
}

/* ============ 分工索引 ============ */
.page-about .ab-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 30px 0 18px;
}
.page-about .ab-filter {
  appearance: none;
  font-family: inherit;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--stone);
  cursor: pointer;
  transition: color var(--t), border-color var(--t), background-color var(--t);
}
.page-about .ab-filter:hover {
  color: var(--paper);
  border-color: var(--moss);
}
.page-about .ab-filter[aria-pressed="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--bg-0);
  font-weight: 700;
}
.page-about .ab-filter:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}
.page-about .ab-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .ab-roster__row {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 8px 17px 14px;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color var(--t);
}
.page-about .ab-roster__row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--neon);
  opacity: 0;
  transition: opacity var(--t);
}
.page-about .ab-roster__row:hover,
.page-about .ab-roster__row:focus-within {
  background: var(--bg-1);
}
.page-about .ab-roster__row:hover::before,
.page-about .ab-roster__row:focus-within::before {
  opacity: 1;
}
.page-about .ab-roster__no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--neon);
  padding-top: 4px;
}
.page-about .ab-roster__role {
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
  letter-spacing: .01em;
}
.page-about .ab-roster__duty {
  grid-column: 2;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--stone);
}
@media (min-width: 760px) {
  .page-about .ab-roster__row {
    grid-template-columns: 74px 168px minmax(0, 1fr);
    align-items: baseline;
    padding-right: 16px;
  }
  .page-about .ab-roster__duty {
    grid-column: 3;
  }
}

/* ============ 复核三步 ============ */
.page-about .ab-figure {
  margin: 30px 0 0;
}
.page-about .ab-figure--banner {
  margin-top: 34px;
}
.page-about .ab-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
@media (min-width: 860px) {
  .page-about .ab-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .ab-steps__item {
  background: var(--bg-0);
  padding: 26px 20px 28px;
  min-width: 0;
}
.page-about .ab-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--neon);
  opacity: .9;
}
.page-about .ab-steps__title {
  margin: 14px 0 0;
  font-size: var(--fs-18);
  font-weight: 800;
  color: var(--paper);
  letter-spacing: -.01em;
}
.page-about .ab-steps__para {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--stone);
}
.page-about .ab-steps__out {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--paper);
}
.page-about .ab-steps__out .idx {
  display: block;
  margin-bottom: 6px;
}

/* ============ 版本轴 ============ */
.page-about .ab-vaxis__list {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}
@media (min-width: 860px) {
  .page-about .ab-vaxis__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
}
.page-about .ab-vaxis__node {
  position: relative;
  padding: 32px 22px 26px 0;
  min-width: 0;
  transition: background-color var(--t);
}
.page-about .ab-vaxis__node::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 10px;
  height: 1px;
  background: var(--ab-track);
}
.page-about .ab-vaxis__node::after {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 2px solid var(--stone);
}
.page-about .ab-vaxis__node:hover {
  background: var(--bg-1);
}
.page-about .ab-vaxis__node--now::after {
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: 0 0 0 5px var(--ab-neon-dim);
}
.page-about .ab-vaxis__node--now {
  background: linear-gradient(180deg, rgba(198, 255, 74, .07), transparent 62%);
}
.page-about .ab-vaxis__ver {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-vaxis__ver--now {
  color: var(--neon);
}
.page-about .ab-vaxis__scope {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--moss);
}
.page-about .ab-vaxis__node--now .ab-vaxis__scope {
  color: var(--neon);
}
.page-about .ab-vaxis__body {
  margin: 12px 0 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--stone);
}
@media (min-width: 860px) {
  .page-about .ab-vaxis__node {
    padding-right: 34px;
  }
  .page-about .ab-vaxis__node + .ab-vaxis__node {
    padding-left: 26px;
  }
  .page-about .ab-vaxis__node + .ab-vaxis__node::before,
  .page-about .ab-vaxis__node + .ab-vaxis__node::after {
    left: 26px;
  }
}

/* ============ 奖项栏目 ============ */
.page-about .ab-awards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 32px;
}
@media (min-width: 880px) {
  .page-about .ab-awards {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }
}
.page-about .ab-rule {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .ab-rule:first-child {
  border-top: 1px solid var(--line-soft);
}
.page-about .ab-rule__no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--clay);
  padding-top: 3px;
}
.page-about .ab-rule__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--paper);
}
.page-about .ab-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .ab-cats__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 6px 12px;
  align-items: baseline;
  background: var(--bg-1);
  padding: 14px 16px;
  min-width: 0;
}
.page-about .ab-cats__no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--neon);
}
.page-about .ab-cats__name {
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
}
.page-about .ab-cats__note {
  grid-column: 2;
  font-size: var(--fs-12);
  color: var(--stone);
  line-height: 1.6;
}

/* ============ 共建范围 ============ */
.page-about .ab-commons {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 32px;
}
@media (min-width: 820px) {
  .page-about .ab-commons {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}
.page-about .ab-commons__text {
  min-width: 0;
}
.page-about .ab-commons__para {
  margin: 0 0 18px;
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--stone);
}
.page-about .ab-commons__para:last-child {
  margin-bottom: 0;
}
.page-about .ab-commons__fig {
  margin: 0;
}
.page-about .ab-boundary {
  margin-top: 38px;
}
.page-about .ab-boundary .board__body p {
  margin: 0 0 12px;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--paper);
}
.page-about .ab-boundary .board__body p:last-child {
  margin-bottom: 0;
}

/* ============ 侧栏 ============ */
.page-about .ab-res__aside {
  min-width: 0;
  padding: 22px 20px 26px;
  background: var(--ab-aside-bg);
  border-top: 2px solid var(--neon);
  border-radius: var(--radius);
}
@media (min-width: 1000px) {
  .page-about .ab-res__aside {
    position: sticky;
    top: 92px;
    align-self: start;
  }
}
.page-about .ab-aside__title {
  margin: 0;
  font-size: var(--fs-18);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-about .ab-aside__note {
  margin: 10px 0 6px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--stone);
}
.page-about .ab-term {
  border-bottom: 1px solid var(--line-soft);
}
.page-about .ab-term__sum {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--paper);
  transition: color var(--t);
}
.page-about .ab-term__sum::-webkit-details-marker {
  display: none;
}
.page-about .ab-term__sum::before {
  content: "+";
  flex: none;
  width: 12px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--neon);
  transition: transform var(--t);
}
.page-about .ab-term[open] .ab-term__sum::before {
  content: "–";
}
.page-about .ab-term__sum:hover {
  color: var(--neon);
}
.page-about .ab-term__sum:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}
.page-about .ab-term__body {
  margin: 0 0 16px;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--stone);
}
.page-about .ab-aside__more {
  margin-top: 24px;
}
.page-about .ab-aside__links {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .ab-aside__links a {
  font-size: var(--fs-14);
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0ms !important;
  }
}
<<<END>>>