.page-about {
  --ab-measure: 720px;
  --ab-hair: rgba(166, 107, 255, .22);
  --ab-hair-strong: rgba(166, 107, 255, .42);
}

/* ============ 首屏 ============ */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(24px, 4.6vw, 48px) clamp(38px, 6.4vw, 74px);
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-hero__aura {
  position: absolute;
  top: -38%;
  right: -16%;
  width: min(700px, 92vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 60% 40%, rgba(108, 43, 217, .58), rgba(11, 11, 20, 0) 66%);
  pointer-events: none;
}

.page-about .ab-hero__aura::after {
  content: "";
  position: absolute;
  bottom: 8%;
  left: 6%;
  width: 46%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(41, 224, 200, .24), rgba(11, 11, 20, 0) 68%);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .breadcrumbs {
  margin-bottom: clamp(18px, 3.4vw, 34px);
}

.page-about .ab-hero .eyebrow {
  margin: 0 0 clamp(14px, 2.4vw, 22px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  align-items: end;
}

.page-about .ab-hero__claim {
  position: relative;
  padding-right: 34px;
}

.page-about .ab-hero h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 8.6vw, 88px);
  line-height: 1.04;
  letter-spacing: -.035em;
  color: var(--paper);
}

.page-about .ab-hero__l1,
.page-about .ab-hero__l2 {
  display: block;
}

.page-about .ab-hero__l2 {
  background: linear-gradient(100deg, var(--violet-lite) 0%, var(--lime) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .ab-hero__claim .note-vertical {
  position: absolute;
  top: 6px;
  right: 0;
}

.page-about .ab-hero__lead {
  margin: 0 0 16px;
  max-width: 52ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.88;
  color: var(--paper-mute);
}

.page-about .ab-hero__lead--sub {
  margin-bottom: 0;
  color: rgba(242, 236, 225, .74);
}

.page-about .ab-hero__ticker {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--ab-hair);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
}

.page-about .ab-hero__ticker li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .ab-hero__ticker b {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--lime);
}

.page-about .ab-hero__ticker span {
  font-size: 13px;
  color: var(--paper-mute);
}

/* ============ 主体骨架 ============ */
.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  padding-block: clamp(34px, 6vw, 72px) clamp(48px, 8vw, 100px);
}

.page-about .ab-rail {
  min-width: 0;
}

.page-about .ab-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--violet-lite);
}

.page-about .ab-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-rail__list > li {
  flex: 0 0 auto;
}

.page-about .ab-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--ab-hair);
  border-radius: 999px;
  font-size: 14px;
  white-space: nowrap;
  color: var(--paper-mute);
  text-decoration: none;
  transition: color .22s ease, border-color .22s ease, background-color .22s ease;
}

.page-about .ab-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--violet-lite);
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--ab-hair-strong);
  background: rgba(108, 43, 217, .16);
}

.page-about .ab-rail__link[aria-current="true"] {
  color: var(--lime);
  border-color: rgba(198, 255, 61, .5);
  background: rgba(198, 255, 61, .08);
}

.page-about .ab-flow {
  min-width: 0;
  display: grid;
  gap: clamp(46px, 7vw, 92px);
}

/* ============ 章节通用 ============ */
.page-about .ab-sec__head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .ab-sec__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--paper-mute);
}

.page-about .ab-sec__idx .index-num {
  margin-right: 6px;
  font-size: 13px;
}

.page-about .ab-sec__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 40px);
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .ab-sec__lead {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.84;
  color: var(--paper-mute);
}

.page-about .ab-sheet {
  padding: clamp(20px, 3.4vw, 40px);
  border-radius: var(--r);
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow-deep);
}

.page-about .ab-sheet p {
  margin: 0 0 1.05em;
  max-width: var(--ab-measure);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.88;
}

.page-about .ab-sheet p:last-child {
  margin-bottom: 0;
}

.page-about .ab-inline-link {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-mute);
  max-width: var(--ab-measure);
}

.page-about .ab-figure {
  margin: clamp(24px, 4vw, 42px) 0 0;
}

.page-about .ab-figure__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r);
  border: 1px solid var(--ab-hair);
  box-shadow: var(--shadow-deep);
}

.page-about .ab-figure__cap {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper-mute);
}

/* ============ 02 规模 ============ */
.page-about .ab-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-metric {
  position: relative;
  padding: 22px 22px 24px;
  border-radius: var(--r);
  border: 1px solid var(--ab-hair);
  border-left: 3px solid var(--violet);
  background: linear-gradient(160deg, rgba(108, 43, 217, .22), rgba(11, 11, 20, .1) 70%);
}

.page-about .ab-metric__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 6vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-about .ab-metric__unit {
  margin-left: 8px;
  font-size: 13px;
  color: var(--paper-mute);
}

.page-about .ab-metric__label {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(242, 236, 225, .8);
}

.page-about .ab-trend {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(16px, 2.6vw, 26px);
  border-radius: var(--r);
  border: 1px solid var(--ab-hair);
  background: rgba(20, 20, 42, .62);
}

.page-about .ab-trend__svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 240px;
}

.page-about .ab-trend__cap {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--paper-mute);
}

.page-about .ab-panel-row {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-callout {
  padding: 20px 22px;
  border-radius: var(--r-sm);
}

.page-about .ab-callout__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-callout__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(242, 236, 225, .82);
}

/* ============ 03 版本时间轴 ============ */
.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-node {
  position: relative;
  padding: 20px 20px 22px;
  border-radius: var(--r);
  border: 1px solid var(--ab-hair);
  background: rgba(20, 20, 42, .7);
  transition: transform .26s ease, border-color .26s ease, box-shadow .26s ease;
}

.page-about .ab-node__ver {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(198, 255, 61, .44);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--lime);
}

.page-about .ab-node__name {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .ab-node__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(242, 236, 225, .78);
}

.page-about .ab-node__points {
  list-style: none;
  margin: 14px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid rgba(166, 107, 255, .2);
  font-size: 13px;
  line-height: 1.9;
  color: var(--violet-lite);
  opacity: .6;
  transform: translateY(3px);
  transition: opacity .26s ease, transform .26s ease;
}

.page-about .ab-node__points li::before {
  content: "· ";
  color: var(--lime);
}

.page-about .ab-node:hover,
.page-about .ab-node:focus-within {
  transform: translateY(-6px);
  border-color: var(--ab-hair-strong);
  box-shadow: var(--shadow-neon);
}

.page-about .ab-node:hover .ab-node__points,
.page-about .ab-node:focus-within .ab-node__points {
  opacity: 1;
  transform: translateY(0);
}

@media (hover: none) {
  .page-about .ab-node__points {
    opacity: 1;
    transform: none;
  }
}

/* ============ 04 服务地区 ============ */
.page-about .ab-regions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}

.page-about .ab-region {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 10px;
  padding: 14px 14px 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--ab-hair);
  background: rgba(20, 20, 42, .62);
  transition: border-color .22s ease, background-color .22s ease;
}

.page-about .ab-region:hover {
  border-color: rgba(198, 255, 61, .42);
  background: rgba(108, 43, 217, .18);
}

.page-about .ab-region__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .ab-region__num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .ab-region__bar {
  grid-column: 1 / -1;
  position: relative;
  display: block;
  height: 4px;
  border-radius: 2px;
  background: rgba(166, 107, 255, .2);
  overflow: hidden;
}

.page-about .ab-region__bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--fill, 0%);
  border-radius: 2px;
  background: linear-gradient(90deg, var(--violet-lite), var(--lime));
}

.page-about .ab-service {
  margin-top: clamp(22px, 3.6vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-service__item {
  padding-left: 18px;
  border-left: 2px solid var(--cyan);
}

.page-about .ab-service__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .ab-service__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--paper-mute);
}

/* ============ 05 团队分工 ============ */
.page-about .ab-teams {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px 22px;
  padding: 20px 0 22px;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-team:last-child {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-team__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--violet-lite);
}

.page-about .ab-team__name {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .ab-team__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.86;
  color: rgba(242, 236, 225, .8);
}

/* ============ CTA ============ */
.page-about .ab-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 46px);
  border-radius: var(--r);
  border: 1px solid var(--ab-hair-strong);
  background: linear-gradient(135deg, rgba(108, 43, 217, .42), rgba(11, 11, 20, .2) 62%);
}

.page-about .ab-cta::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 260px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(198, 255, 61, .28), rgba(11, 11, 20, 0) 68%);
  pointer-events: none;
}

.page-about .ab-cta__title {
  position: relative;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .ab-cta__text {
  position: relative;
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(242, 236, 225, .82);
}

.page-about .ab-cta__links {
  position: relative;
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 断点 ============ */
@media (min-width: 680px) {
  .page-about .ab-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-metric:nth-child(2),
  .page-about .ab-metric:nth-child(4) {
    margin-top: 22px;
  }

  .page-about .ab-panel-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .ab-hero__ticker {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-team {
    grid-template-columns: 52px 150px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 780px) {
  .page-about .ab-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    padding-top: 26px;
  }

  .page-about .ab-track::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    border-radius: 1px;
    background: linear-gradient(90deg, var(--violet), var(--violet-lite) 52%, var(--lime));
    opacity: .55;
  }

  .page-about .ab-node::before {
    content: "";
    position: absolute;
    top: -26px;
    left: 20px;
    width: 2px;
    height: 26px;
    background: var(--lime);
    opacity: .7;
  }

  .page-about .ab-service {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 880px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.34fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }

  .page-about .ab-hero__brief {
    padding-bottom: 6px;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-body {
    grid-template-columns: 206px minmax(0, 1fr);
    gap: clamp(36px, 4.4vw, 74px);
  }

  .page-about .ab-rail {
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-about .ab-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-rail__list > li {
    flex: none;
  }

  .page-about .ab-rail__link {
    border: 0;
    border-left: 2px solid rgba(166, 107, 255, .22);
    border-radius: 0;
    padding: 12px 0 12px 16px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .ab-rail__link[aria-current="true"] {
    border-left-color: var(--lime);
    background: none;
  }
}

@media (min-width: 1100px) {
  .page-about .ab-sec__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }
}
<<<END>>>

.page-about {
  --fill: currentColor;
}