.page-about {
  --ab-line: rgba(167, 139, 250, .24);
  --ab-line-soft: rgba(167, 139, 250, .12);
  --ab-gold-soft: rgba(245, 200, 107, .16);
  background: var(--gx-void);
  color: var(--gx-white);
  overflow-x: hidden;
}

.page-about .ab-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(44px, 7vw, 88px);
  background:
    radial-gradient(980px 520px at 80% 4%, rgba(108, 76, 241, .26), transparent 68%),
    radial-gradient(680px 420px at 4% 92%, rgba(79, 216, 232, .09), transparent 72%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--gx-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--gx-grid-line) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .55), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .55), transparent 76%);
}

.page-about .ab-hero .gx-wrap {
  position: relative;
  z-index: 1;
}

.page-about .ab-crumbs {
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 36px;
}

.page-about .ab-hero__coord {
  margin: 0;
  font-family: var(--gx-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gx-lumen);
}

.page-about .ab-hero h1 {
  margin: 18px 0 0;
  font-size: clamp(1.85rem, 5vw, 3.4rem);
  line-height: 1.18;
  letter-spacing: .03em;
  font-weight: 700;
  text-wrap: balance;
}

.page-about .ab-hero__intro {
  margin: 22px 0 0;
  max-width: 34em;
  font-size: clamp(.9375rem, 1.7vw, 1.0625rem);
  line-height: 1.95;
  color: rgba(238, 242, 255, .8);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .ab-hero__index {
  padding: 20px;
  border: 1px solid var(--ab-line);
  border-radius: 4px;
  background: var(--gx-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.page-about .ab-hero__index-title {
  margin: 0 0 12px;
  font-family: var(--gx-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: rgba(238, 242, 255, .58);
}

.page-about .ab-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-index-list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 4px;
  border-bottom: 1px solid var(--ab-line-soft);
  font-size: .875rem;
  color: var(--gx-white);
  text-decoration: none;
  transition: color .2s var(--gx-ease), padding-left .2s var(--gx-ease);
}

.page-about .ab-index-list li:last-child a {
  border-bottom: 0;
  padding-bottom: 4px;
}

.page-about .ab-index-list a:hover,
.page-about .ab-index-list a:focus-visible {
  color: var(--gx-gold);
  padding-left: 12px;
}

.page-about .ab-idx {
  font-family: var(--gx-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gx-lumen);
  flex: 0 0 auto;
}

/* ---------- 轨道流程 ---------- */

.page-about .ab-flow {
  position: relative;
  padding: clamp(8px, 2vw, 20px) 0 clamp(56px, 9vw, 104px);
}

.page-about .ab-flow::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: 40px;
  width: 1px;
  background: linear-gradient(180deg, rgba(108, 76, 241, .6), rgba(167, 139, 250, .22) 58%, rgba(167, 139, 250, 0));
}

.page-about .ab-node {
  position: relative;
  padding: 0 0 clamp(44px, 7vw, 64px) 30px;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gx-void);
  border: 1px solid var(--gx-galaxy);
  box-shadow: 0 0 0 4px rgba(108, 76, 241, .13);
}

.page-about .ab-node--last {
  padding-bottom: 0;
}

.page-about .ab-node--last::before {
  background: var(--gx-gold);
  border-color: var(--gx-gold);
  box-shadow: 0 0 0 4px var(--ab-gold-soft);
}

.page-about .ab-node__mark {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 10px;
}

.page-about .ab-node__year {
  font-family: var(--gx-mono);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--gx-gold);
}

.page-about .ab-node__tag {
  font-family: var(--gx-mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gx-lumen);
}

.page-about .ab-node h2 {
  margin: 0 0 16px;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.3;
  letter-spacing: .02em;
  font-weight: 700;
  text-wrap: balance;
}

.page-about .ab-node p {
  max-width: 36em;
  margin: 0 0 14px;
  font-size: .9375rem;
  line-height: 1.9;
  color: rgba(238, 242, 255, .78);
}

.page-about .ab-node p a {
  color: var(--gx-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 200, 107, .45);
  padding-bottom: 1px;
}

.page-about .ab-node p a:hover,
.page-about .ab-node p a:focus-visible {
  border-bottom-color: var(--gx-gold);
}

/* ---------- 图片 ---------- */

.page-about .ab-figure {
  margin: 22px 0 0;
}

.page-about .ab-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--ab-line-soft);
  background: linear-gradient(160deg, rgba(42, 27, 94, .6), rgba(5, 8, 23, .9));
}

.page-about .ab-figure--tall .ab-img {
  aspect-ratio: 10 / 14;
}

.page-about .ab-figure--wide .ab-img {
  aspect-ratio: 3 / 2;
}

.page-about .ab-figure--after {
  margin-top: 30px;
}

.page-about .ab-figure__cap {
  margin-top: 10px;
  font-family: var(--gx-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: rgba(238, 242, 255, .42);
}

/* ---------- 起源排版 ---------- */

.page-about .ab-origin__grid {
  display: grid;
  gap: 8px;
}

.page-about .ab-origin__grid .ab-figure {
  margin-top: 14px;
  max-width: 320px;
}

/* ---------- 数字 ---------- */

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 20px;
  border: 1px solid var(--ab-line);
  background: var(--ab-line);
}

.page-about .ab-stat {
  position: relative;
  padding: 20px 16px 18px;
  background: var(--gx-orbit);
}

.page-about .ab-stat__coord {
  display: block;
  font-family: var(--gx-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--gx-lumen);
  margin-bottom: 12px;
}

.page-about .ab-stat__num {
  display: block;
  font-family: var(--gx-mono);
  font-size: clamp(1.9rem, 6vw, 2.85rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gx-gold);
}

.page-about .ab-stat__unit {
  font-size: .38em;
  letter-spacing: .04em;
  margin-left: 6px;
  color: rgba(245, 200, 107, .8);
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 12px;
  font-size: .75rem;
  line-height: 1.7;
  color: rgba(238, 242, 255, .6);
}

.page-about .ab-scale-notes {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.page-about .ab-scale-notes li {
  font-size: .8125rem;
  color: rgba(238, 242, 255, .62);
}

.page-about .ab-scale-notes span {
  font-family: var(--gx-mono);
  font-size: .9375rem;
  color: var(--gx-cyan);
  margin-right: 6px;
}

/* ---------- 团队星团 ---------- */

.page-about .ab-cluster {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.page-about .ab-team {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--ab-line);
  border-left: 2px solid var(--gx-galaxy);
  background: linear-gradient(158deg, rgba(42, 27, 94, .55), rgba(11, 16, 46, .55));
  transition: border-left-color .25s var(--gx-ease), transform .25s var(--gx-ease);
}

.page-about .ab-team:hover,
.page-about .ab-team:focus-within {
  border-left-color: var(--gx-gold);
  transform: translateY(-3px);
}

.page-about .ab-team__no {
  display: block;
  font-family: var(--gx-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gx-lumen);
  margin-bottom: 8px;
}

.page-about .ab-team h3 {
  margin: 0 0 10px;
  font-size: 1.0625rem;
  letter-spacing: .04em;
  color: var(--gx-white);
}

.page-about .ab-team p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.85;
  color: rgba(238, 242, 255, .74);
}

.page-about .ab-team__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  opacity: .5;
  transition: opacity .25s var(--gx-ease);
}

.page-about .ab-team:hover .ab-team__tags,
.page-about .ab-team:focus-within .ab-team__tags {
  opacity: 1;
}

.page-about .ab-team__tags span {
  font-size: 11px;
  padding: 3px 9px;
  border: 1px solid var(--ab-line);
  border-radius: 999px;
  color: rgba(238, 242, 255, .82);
}

.page-about .ab-team__link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--gx-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gx-lumen);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--gx-ease), border-bottom-color .2s var(--gx-ease);
}

.page-about .ab-team__link:hover,
.page-about .ab-team__link:focus-visible {
  color: var(--gx-gold);
  border-bottom-color: var(--gx-gold);
}

/* ---------- 三道复核 ---------- */

.page-about .ab-review {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-about .ab-step {
  padding: 20px 18px;
  border: 1px solid var(--ab-line-soft);
  border-top: 1px solid rgba(245, 200, 107, .5);
  background: linear-gradient(180deg, rgba(42, 27, 94, .38), rgba(11, 16, 46, .18));
}

.page-about .ab-step__no {
  display: block;
  font-family: var(--gx-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--gx-gold);
  margin-bottom: 10px;
}

.page-about .ab-step h3 {
  margin: 0 0 10px;
  font-size: 1rem;
  letter-spacing: .04em;
  color: var(--gx-white);
}

.page-about .ab-step p {
  margin: 0 0 10px;
  font-size: .875rem;
  line-height: 1.85;
  color: rgba(238, 242, 255, .74);
}

.page-about .ab-step__rule {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--ab-line);
  font-family: var(--gx-mono);
  font-size: .75rem;
  line-height: 1.7;
  color: var(--gx-cyan);
}

.page-about .ab-gov-note {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 2px solid var(--gx-galaxy);
  font-size: .875rem;
  line-height: 1.9;
  color: rgba(238, 242, 255, .72);
  max-width: 36em;
}

/* ---------- 沿革折叠 ---------- */

.page-about .ab-log {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 46em;
}

.page-about .ab-log__item {
  border: 1px solid var(--ab-line-soft);
  background: rgba(11, 16, 46, .55);
  transition: border-color .25s var(--gx-ease);
}

.page-about .ab-log__item:hover {
  border-color: var(--ab-line);
}

.page-about .ab-log__item[open] {
  border-color: var(--ab-line);
  background: rgba(42, 27, 94, .32);
}

.page-about .ab-log__item summary {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 14px 15px;
  list-style: none;
  cursor: pointer;
}

.page-about .ab-log__item summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-log__item summary:focus-visible {
  outline: 1px solid var(--gx-gold);
  outline-offset: -2px;
}

.page-about .ab-log__yr {
  flex: 0 0 auto;
  min-width: 3.4em;
  font-family: var(--gx-mono);
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--gx-gold);
}

.page-about .ab-log__ttl {
  flex: 1 1 auto;
  font-size: .9375rem;
  line-height: 1.6;
  color: var(--gx-white);
}

.page-about .ab-log__sign {
  flex: 0 0 auto;
  font-size: .75rem;
  color: var(--gx-lumen);
  transition: transform .24s ease-out;
}

.page-about .ab-log__item[open] .ab-log__sign {
  transform: rotate(180deg);
}

.page-about .ab-log__body {
  padding: 0 15px 18px;
  font-size: .875rem;
  line-height: 1.9;
  color: rgba(238, 242, 255, .74);
  border-top: 1px solid var(--ab-line-soft);
  padding-top: 14px;
}

.page-about .ab-log__body a {
  color: var(--gx-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 200, 107, .45);
}

.page-about .ab-log__body a:hover,
.page-about .ab-log__body a:focus-visible {
  border-bottom-color: var(--gx-gold);
}

/* ---------- 下一步 ---------- */

.page-about .ab-ways {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .ab-way {
  display: block;
  padding: 20px 18px;
  border: 1px solid var(--ab-line);
  background: rgba(11, 16, 46, .55);
  color: var(--gx-white);
  text-decoration: none;
  transition: border-color .25s var(--gx-ease), transform .25s var(--gx-ease), background .25s var(--gx-ease);
}

.page-about .ab-way:hover,
.page-about .ab-way:focus-visible {
  border-color: var(--gx-gold);
  background: rgba(42, 27, 94, .5);
  transform: translateY(-3px);
}

.page-about .ab-way__t {
  display: block;
  margin-bottom: 8px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .03em;
}

.page-about .ab-way__d {
  display: block;
  font-size: .8125rem;
  line-height: 1.8;
  color: rgba(238, 242, 255, .7);
}

.page-about .ab-next-note {
  margin-top: 22px;
  font-size: .8125rem;
  line-height: 1.9;
  color: rgba(238, 242, 255, .6);
  max-width: 36em;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-stat {
    padding: 24px 22px 22px;
  }

  .page-about .ab-team {
    padding: 24px 22px 22px;
  }

  .page-about .ab-step {
    padding: 24px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .ab-hero__index {
    margin-top: 8px;
  }

  .page-about .ab-flow::before {
    left: 84px;
    top: 18px;
    bottom: 72px;
  }

  .page-about .ab-node {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 44px;
    padding: 0 0 clamp(64px, 7vw, 92px) 0;
  }

  .page-about .ab-node::before {
    left: 80px;
    top: 10px;
  }

  .page-about .ab-node__mark {
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-start;
    text-align: right;
    padding-right: 100px;
    margin-bottom: 0;
    gap: 6px;
  }

  .page-about .ab-node h2 {
    margin-top: -6px;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-origin__grid .ab-figure {
    margin-top: 6px;
    max-width: none;
  }

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

  .page-about .ab-cluster {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .ab-cluster > :nth-child(2) {
    margin-top: 54px;
  }

  .page-about .ab-cluster > :nth-child(3) {
    margin-top: 22px;
  }

  .page-about .ab-review {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-ways {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-figure--tall .ab-img {
    aspect-ratio: 10 / 13;
  }

  .page-about .ab-node {
    grid-template-columns: 190px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index-list a,
  .page-about .ab-team,
  .page-about .ab-team__tags,
  .page-about .ab-way,
  .page-about .ab-log__sign {
    transition: opacity .2s linear;
  }

  .page-about .ab-team:hover,
  .page-about .ab-way:hover,
  .page-about .ab-way:focus-visible {
    transform: none;
  }
}
<<<END>>>