.page-about {
  --ab-line: rgba(255, 255, 255, 0.09);
  --ab-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ab-rail-w: 132px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2.25rem, 7vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem);
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-hero__glow {
  position: absolute;
  top: -30%;
  right: -15%;
  width: min(70vw, 760px);
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 50% 50%, rgba(123, 69, 255, 0.38), rgba(123, 69, 255, 0) 62%),
    radial-gradient(circle at 72% 68%, rgba(232, 184, 92, 0.22), rgba(232, 184, 92, 0) 55%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .ab-hero__crumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .ab-hero__idx {
  margin: 0 0 0.9rem;
}

.page-about .ab-hero__title {
  margin: 0;
  font-family: var(--nx-sans);
  font-weight: 200;
  font-size: clamp(2.3rem, 7vw, 5.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--nx-cloud);
}

.page-about .ab-hero__lead {
  max-width: 34em;
  margin: 1.4rem 0 0;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--nx-mist);
}

.page-about .ab-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem 2.6rem;
  list-style: none;
  margin: 2.2rem 0 0;
  padding: 0;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-left: 0.9rem;
  border-left: 1px solid var(--nx-gold);
}

.page-about .ab-stat__num {
  font-family: var(--nx-mono);
  font-weight: 500;
  font-size: clamp(1.45rem, 3.4vw, 2rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--nx-cloud);
}

.page-about .ab-stat__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--nx-mist);
}

/* ---------- 轨道 + 内容骨架 ---------- */
.page-about .ab-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 3rem);
  padding-top: clamp(2.25rem, 6vw, 4rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

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

.page-about .ab-rail__head {
  margin: 0 0 0.75rem;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--nx-mist);
}

.page-about .ab-rail__list {
  display: flex;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0 0 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .ab-rail__link {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--ab-line);
  border-radius: 999px;
  text-decoration: none;
  color: var(--nx-mist);
  white-space: nowrap;
  transition: color 0.22s var(--ab-ease), border-color 0.22s var(--ab-ease),
    background-color 0.22s var(--ab-ease);
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--nx-cloud);
  border-color: var(--nx-violet);
  background: rgba(123, 69, 255, 0.14);
  outline: none;
}

.page-about .ab-rail__num {
  font-family: var(--nx-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--nx-violet-soft);
}

.page-about .ab-rail__label {
  font-size: 13px;
}

.page-about .ab-rail__hint {
  display: none;
}

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

/* ---------- 段落 ---------- */
.page-about .ab-sec {
  padding: clamp(2.5rem, 6vw, 4rem) 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

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

.page-about .ab-sec__head {
  max-width: 36em;
}

.page-about .ab-sec__h {
  margin: 0.6rem 0 0;
  font-family: var(--nx-sans);
  font-weight: 200;
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--nx-cloud);
}

.page-about .ab-sec__lead {
  margin: 1rem 0 0;
  max-width: 34em;
  line-height: 1.85;
  color: var(--nx-mist);
}

.page-about .ab-sec__body p {
  max-width: 34em;
  margin: 1.1rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--nx-cloud);
}

.page-about .ab-sec__body p:first-child {
  margin-top: 1.5rem;
}

.page-about .ab-sec__note {
  margin: 2.2rem 0 0;
  max-width: 40em;
  padding-left: 1rem;
  border-left: 2px solid var(--nx-gold);
  line-height: 1.85;
  color: var(--nx-cloud);
}

.page-about .ab-link {
  color: var(--nx-violet-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(180, 155, 255, 0.5);
  transition: color 0.22s var(--ab-ease), border-color 0.22s var(--ab-ease);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--nx-gold);
  border-color: var(--nx-gold);
  outline: none;
}

/* ---------- 引语 ---------- */
.page-about .ab-quote {
  position: relative;
  margin: 2.2rem 0 0;
  padding: 1.4rem 1.5rem 1.4rem 3rem;
  border-left: 2px solid var(--nx-violet);
  border-radius: 0 var(--nx-radius) var(--nx-radius) 0;
  background: linear-gradient(90deg, rgba(232, 184, 92, 0.09), rgba(255, 255, 255, 0));
}

.page-about .ab-quote__mark {
  position: absolute;
  left: 0.95rem;
  top: 0.85rem;
  font-family: var(--nx-mono);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--nx-gold);
  opacity: 0.85;
}

.page-about .ab-quote p {
  margin: 0;
  max-width: 32em;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--nx-cloud);
}

/* ---------- 图文错层 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  margin-top: 1.8rem;
}

.page-about .ab-split__text p {
  max-width: 34em;
  margin: 0 0 1.1rem;
  line-height: 1.85;
  color: var(--nx-cloud);
}

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

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--nx-radius);
  border: 1px solid var(--ab-line);
  object-fit: cover;
}

.page-about .ab-figure__cap {
  margin-top: 0.7rem;
  font-family: var(--nx-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--nx-mist);
}

/* ---------- 色板 ---------- */
.page-about .ab-swatches {
  display: grid;
  gap: 0.85rem;
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.page-about .ab-swatch {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-swatch:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-swatch__dot {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  border: 1px solid var(--nx-glass-line);
}

.page-about .ab-swatch--violet .ab-swatch__dot {
  background: linear-gradient(140deg, #7b45ff, #b49bff);
}

.page-about .ab-swatch--gold .ab-swatch__dot {
  background: linear-gradient(140deg, #e8b85c, #ff8a3d);
}

.page-about .ab-swatch--jade .ab-swatch__dot {
  background: linear-gradient(140deg, #3fd2c7, #7b45ff);
}

.page-about .ab-swatch--ink .ab-swatch__dot {
  background: linear-gradient(140deg, #131120, #08070d);
}

.page-about .ab-swatch__name {
  font-size: 14px;
  color: var(--nx-cloud);
}

.page-about .ab-swatch__use {
  margin-left: auto;
  font-family: var(--nx-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--nx-mist);
}

/* ---------- 演进刻度 ---------- */
.page-about .ab-tl {
  position: relative;
  list-style: none;
  margin: 2.4rem 0 0;
  padding: 0 0 0 1.6rem;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(
    180deg,
    rgba(123, 69, 255, 0.9),
    rgba(232, 184, 92, 0.55) 55%,
    rgba(255, 255, 255, 0.06)
  );
}

.page-about .ab-tl__row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.35rem;
  padding: 0 0 2.2rem 0;
}

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

.page-about .ab-tl__row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--nx-ink);
  border: 1px solid var(--nx-violet);
  box-shadow: 0 0 0 4px rgba(123, 69, 255, 0.14);
  transform: translateX(-4.5px);
}

.page-about .ab-tl__num {
  font-family: var(--nx-mono);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(180, 155, 255, 0.42);
}

.page-about .ab-tl__era {
  margin: 0;
  font-family: var(--nx-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--nx-gold);
}

.page-about .ab-tl__h {
  margin: 0.4rem 0 0;
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--nx-cloud);
}

.page-about .ab-tl__p {
  margin: 0.4rem 0 0;
  max-width: 32em;
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--nx-mist);
}

.page-about .ab-band {
  margin: 1.4rem 0 0;
}

.page-about .ab-band img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--nx-radius);
  border: 1px solid var(--ab-line);
}

/* ---------- 团队 ---------- */
.page-about .ab-team-media {
  max-width: 100%;
  margin: 1.8rem 0 0;
}

.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .ab-flip {
  perspective: 1200px;
  outline: none;
  border-radius: var(--nx-radius);
}

.page-about .ab-flip:focus-visible {
  outline: 2px solid var(--nx-violet-soft);
  outline-offset: 4px;
}

.page-about .ab-flip__inner {
  display: grid;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.62s var(--ab-ease);
}

.page-about .ab-flip:hover .ab-flip__inner,
.page-about .ab-flip:focus-visible .ab-flip__inner {
  transform: rotateY(180deg);
}

.page-about .ab-flip__face {
  grid-area: 1 / 1;
  display: flex;
  flex-direction: column;
  min-height: 250px;
  padding: 1.5rem 1.35rem;
  border: 1px solid var(--ab-line);
  border-radius: var(--nx-radius);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.page-about .ab-flip__face--back {
  transform: rotateY(180deg);
  justify-content: center;
  border-color: rgba(123, 69, 255, 0.75);
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(232, 184, 92, 0.16), transparent 62%),
    linear-gradient(150deg, rgba(123, 69, 255, 0.28), rgba(19, 17, 32, 0.9));
}

.page-about .ab-flip__kicker {
  margin: 0;
  font-family: var(--nx-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--nx-gold);
}

.page-about .ab-flip__h {
  margin: 0.7rem 0 0;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--nx-cloud);
}

.page-about .ab-flip__p {
  margin: 0.7rem 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--nx-mist);
}

.page-about .ab-flip__face--back .ab-flip__p {
  color: var(--nx-cloud);
}

.page-about .ab-flip__backh {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--nx-gold);
}

.page-about .ab-flip__cue {
  margin-top: auto;
  padding-top: 1.1rem;
  font-family: var(--nx-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--nx-violet-soft);
}

/* ---------- 服务标准 ---------- */
.page-about .ab-rules {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.page-about .ab-rule {
  padding: 1.4rem 1.3rem;
  border: 1px solid var(--ab-line);
  border-radius: var(--nx-radius);
  background: rgba(255, 255, 255, 0.05);
  transition: transform 0.22s var(--ab-ease), border-color 0.22s var(--ab-ease);
}

.page-about .ab-rule:hover {
  transform: translateY(-4px);
  border-color: var(--nx-violet);
}

.page-about .ab-rule__num {
  margin: 0;
  font-family: var(--nx-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--nx-gold);
}

.page-about .ab-rule__h {
  margin: 0.6rem 0 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--nx-cloud);
}

.page-about .ab-rule__p {
  margin: 0.5rem 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--nx-mist);
}

/* ---------- 合作规模 ---------- */
.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem 1.6rem;
  margin: 2rem 0 0;
  padding: 0;
}

.page-about .ab-metric {
  padding-top: 0.9rem;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-metric dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--nx-mist);
}

.page-about .ab-metric dd {
  margin: 0.55rem 0 0;
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.page-about .ab-metric__n {
  font-family: var(--nx-mono);
  font-weight: 300;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--nx-cloud);
}

.page-about .ab-metric__u {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--nx-gold);
}

/* ---------- 收尾 ---------- */
.page-about .ab-next {
  margin-top: 1.8rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--ab-line);
  border-radius: var(--nx-radius);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(232, 184, 92, 0.16), transparent 60%),
    radial-gradient(120% 140% at 0% 100%, rgba(123, 69, 255, 0.24), transparent 62%),
    var(--nx-ink-2);
}

.page-about .ab-next p {
  max-width: 36em;
  margin: 0 0 1rem;
  line-height: 1.85;
  color: var(--nx-cloud);
}

.page-about .ab-next p:last-of-type {
  margin-bottom: 0;
}

.page-about .ab-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.7rem;
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-about .ab-tl__row {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 1.4rem;
    align-items: start;
  }

  .page-about .ab-tl__num {
    text-align: right;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .ab-shell {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-about .ab-rail {
    position: sticky;
    top: 5.5rem;
    align-self: start;
  }

  .page-about .ab-rail__list {
    flex-direction: column;
    gap: 0.1rem;
    padding: 0;
    overflow: visible;
  }

  .page-about .ab-rail__link {
    align-items: baseline;
    gap: 0.6rem;
    padding: 0.6rem 0.4rem 0.6rem 1.1rem;
    border: 0;
    border-radius: 10px;
    white-space: normal;
  }

  .page-about .ab-rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.9rem;
    width: 3px;
    height: 4px;
    border-radius: 2px;
    background: var(--nx-violet-soft);
    opacity: 0.65;
    transition: height 0.22s var(--ab-ease), background-color 0.22s var(--ab-ease),
      top 0.22s var(--ab-ease), opacity 0.22s var(--ab-ease);
  }

  .page-about .ab-rail__link:hover,
  .page-about .ab-rail__link:focus-visible {
    background: rgba(123, 69, 255, 0.12);
  }

  .page-about .ab-rail__link:hover::before,
  .page-about .ab-rail__link:focus-visible::before {
    top: 0.45rem;
    height: 1.5rem;
    background: var(--nx-gold);
    opacity: 1;
  }

  .page-about .ab-rail__hint {
    display: block;
    flex-basis: 100%;
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    font-size: 12px;
    line-height: 1.65;
    color: var(--nx-violet-soft);
    transition: max-height 0.25s var(--ab-ease), opacity 0.25s var(--ab-ease),
      margin-top 0.25s var(--ab-ease);
  }

  .page-about .ab-rail__link:hover .ab-rail__hint,
  .page-about .ab-rail__link:focus-visible .ab-rail__hint {
    max-height: 4rem;
    margin-top: 0.35rem;
    opacity: 1;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3.2rem;
    align-items: start;
  }

  .page-about .ab-split__media {
    margin-top: 2.8rem;
  }

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

  .page-about .ab-team-media {
    max-width: 560px;
    margin-left: auto;
    margin-right: 8%;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-rules {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .ab-rule:nth-child(1),
  .page-about .ab-rule:nth-child(2) {
    grid-column: span 3;
  }

  .page-about .ab-rule:nth-child(n + 3) {
    grid-column: span 2;
  }
}

/* ---------- 降级动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-flip__inner,
  .page-about .ab-rule,
  .page-about .ab-rail__link,
  .page-about .ab-rail__link::before,
  .page-about .ab-rail__hint,
  .page-about .ab-hero__glow {
    transition: none;
  }

  .page-about .ab-flip:hover .ab-flip__inner,
  .page-about .ab-flip:focus-visible .ab-flip__inner {
    transform: none;
  }

  .page-about .ab-rule:hover {
    transform: none;
  }
}
<<<END>>>