.page-about {
  --ab-pad: clamp(2rem, 5vw, 3.5rem);
  --ab-radius: 0;
  background: var(--ink);
  color: var(--paper);
}

.page-about .ab-crumbwrap {
  padding-top: clamp(.9rem, 2.5vw, 1.5rem);
  padding-bottom: .25rem;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2.25rem) 0 clamp(2rem, 5vw, 3.5rem);
  border-bottom: var(--rule);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
}

.page-about .ab-hero__title {
  margin: .6rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.15rem, 7.4vw, 4.3rem);
  line-height: 1.02;
  letter-spacing: -.025em;
  text-wrap: balance;
}

.page-about .ab-hero__title em {
  font-style: normal;
  color: var(--lime);
  box-shadow: inset 0 -.14em 0 rgba(200, 255, 61, .22);
}

.page-about .ab-hero__lead {
  max-width: 46ch;
  margin: 1rem 0 0;
  color: var(--mist);
  font-size: clamp(.975rem, 2.4vw, 1.1rem);
  line-height: 1.78;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.5rem;
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 1.75rem 0 0;
  padding-top: 1.25rem;
  border-top: var(--rule);
  background: var(--line);
}

.page-about .ab-hero__stat {
  background: var(--ink);
  padding: .25rem .6rem .25rem 0;
}

.page-about .ab-hero__stat dt {
  color: var(--mist);
  font-size: .7rem;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.page-about .ab-hero__stat dd {
  margin: .3rem 0 0;
  color: var(--lime);
  font-size: clamp(1.15rem, 3.4vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -.01em;
}

.page-about .ab-hero__visual {
  position: relative;
  margin: 0;
  border: var(--rule);
  background: var(--moss);
  overflow: hidden;
}

.page-about .ab-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05) brightness(.78);
}

.page-about .ab-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(to bottom, rgba(11, 15, 13, .38) 0 1px, transparent 1px 4px);
  mix-blend-mode: multiply;
  opacity: .55;
}

.page-about .ab-hero__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: .25rem .75rem;
  align-items: baseline;
  padding: .7rem .9rem;
  background: rgba(11, 15, 13, .88);
  border-top: 1px solid rgba(200, 255, 61, .5);
  color: var(--paper);
  font-size: .8rem;
  line-height: 1.5;
}

.page-about .ab-hero__cap .sk-mono {
  color: var(--lime);
  font-size: .7rem;
  letter-spacing: .14em;
}

/* ---------- 主体骨架 ---------- */
.page-about .ab-body {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
}

.page-about .ab-rail {
  display: grid;
  gap: .85rem;
  align-content: start;
  padding: 1.1rem;
  border: var(--rule);
  background: var(--panel);
}

.page-about .ab-rail__label {
  margin: 0;
  color: var(--signal);
  font-size: .68rem;
  letter-spacing: .18em;
}

.page-about .ab-rail__motto {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .ab-rail__nav {
  display: grid;
  gap: .1rem;
  border-top: var(--rule);
  padding-top: .7rem;
}

.page-about .ab-rail__nav a {
  display: block;
  padding: .45rem 0 .45rem .7rem;
  border-left: 2px solid var(--line);
  color: var(--mist);
  font-size: .86rem;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-rail__nav a:hover,
.page-about .ab-rail__nav a:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(200, 255, 61, .06);
}

.page-about .ab-rail__note {
  margin: 0;
  padding-top: .7rem;
  border-top: var(--rule);
  color: var(--mist);
  font-size: .8rem;
  line-height: 1.65;
}

.page-about .ab-rail__link {
  color: var(--lime);
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: .02em;
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节 ---------- */
.page-about .ab-flow {
  display: grid;
  gap: 0;
  min-width: 0;
}

.page-about .ab-section {
  padding-block: clamp(1.9rem, 5vw, 3rem);
  border-top: var(--rule);
  scroll-margin-top: 6.5rem;
  min-width: 0;
}

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

.page-about .ab-h2 {
  margin: .55rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.6vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -.02em;
  text-wrap: balance;
}

.page-about .ab-p {
  max-width: 62ch;
  margin: .9rem 0 0;
  color: var(--mist);
  font-size: .975rem;
  line-height: 1.8;
}

.page-about .ab-inline-link {
  margin: 1.5rem 0 0;
  padding-top: .9rem;
  border-top: var(--rule);
  color: var(--mist);
  font-size: .9rem;
}

.page-about .ab-inline-link a {
  color: var(--lime);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .45);
}

.page-about .ab-inline-link a:hover,
.page-about .ab-inline-link a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 三点 ---------- */
.page-about .ab-points {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--rule);
}

.page-about .ab-point {
  background: var(--ink);
  padding: clamp(.9rem, 3vw, 1.35rem);
}

.page-about .ab-point__num {
  display: block;
  color: var(--lime-dim);
  font-size: .78rem;
  letter-spacing: .16em;
}

.page-about .ab-point__t {
  margin: .45rem 0 0;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .ab-point__d {
  margin: .45rem 0 0;
  color: var(--mist);
  font-size: .88rem;
  line-height: 1.7;
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0 0 0 1.15rem;
  border-left: 1px solid var(--line);
  display: grid;
  gap: .7rem;
}

.page-about .ab-timeline__item {
  position: relative;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1.15rem - 4px);
  top: 1.05rem;
  width: 8px;
  height: 8px;
  background: var(--lime);
  transition: background var(--dur) var(--ease);
}

.page-about .ab-timeline__item:has(.ab-stage[open])::before {
  background: var(--ember);
}

.page-about .ab-stage {
  background: var(--panel);
  border: var(--rule);
}

.page-about .ab-stage__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: .7rem;
  align-items: baseline;
  padding: .8rem .9rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ab-stage__summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .ab-stage__year {
  color: var(--lime);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 600;
  letter-spacing: .02em;
}

.page-about .ab-stage__title {
  font-size: .97rem;
  font-weight: 700;
}

.page-about .ab-stage__hint {
  color: var(--mist);
  font-size: .72rem;
  letter-spacing: .08em;
  white-space: nowrap;
}

.page-about .ab-stage[open] .ab-stage__hint {
  color: var(--ember);
}

.page-about .ab-stage__body {
  margin: 0;
  padding: .85rem .9rem 1rem;
  border-top: var(--rule);
  color: var(--mist);
  font-size: .9rem;
  line-height: 1.75;
}

/* ---------- 三步 ---------- */
.page-about .ab-steps {
  display: grid;
  gap: 1px;
  margin-top: 1.6rem;
  background: var(--line);
  border: var(--rule);
}

.page-about .ab-step {
  background: var(--ink);
  padding: clamp(.95rem, 3vw, 1.4rem);
}

.page-about .ab-step__num {
  display: block;
  color: var(--lime);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: -.02em;
}

.page-about .ab-step__t {
  margin: .4rem 0 0;
  font-size: 1rem;
  font-weight: 700;
}

.page-about .ab-step__d {
  margin: .45rem 0 0;
  color: var(--mist);
  font-size: .87rem;
  line-height: 1.72;
}

/* ---------- 团队数据 ---------- */
.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.6rem 0 0;
  background: var(--line);
  border: var(--rule);
}

.page-about .ab-metric {
  background: var(--panel);
  padding: clamp(.85rem, 3vw, 1.2rem);
}

.page-about .ab-metric__k {
  margin: 0;
  color: var(--signal);
  font-size: .7rem;
  letter-spacing: .12em;
}

.page-about .ab-metric__v {
  margin: .35rem 0 0;
  color: var(--paper);
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 600;
  letter-spacing: -.02em;
}

.page-about .ab-metric__n {
  margin: .45rem 0 0;
  color: var(--mist);
  font-size: .8rem;
  line-height: 1.6;
}

/* ---------- 图片块 ---------- */
.page-about .ab-media {
  margin: 1.6rem 0 0;
  border: var(--rule);
  background: var(--panel);
}

.page-about .ab-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.9) brightness(.85);
}

.page-about .ab-media__cap {
  padding: .65rem .85rem;
  border-top: var(--rule);
  color: var(--mist);
  font-size: .8rem;
  line-height: 1.6;
}

.page-about .ab-media--tight img {
  aspect-ratio: 16 / 10;
}

/* ---------- 发布流程 ---------- */
.page-about .ab-release {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.6rem;
}

.page-about .ab-release__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--rule);
}

.page-about .ab-rstep {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .8rem;
  align-items: start;
  background: var(--ink);
  padding: .9rem;
}

.page-about .ab-rstep__i {
  display: grid;
  place-items: center;
  width: 1.85rem;
  height: 1.85rem;
  border: 1px solid var(--lime-dim);
  color: var(--lime);
  font-size: .8rem;
  font-weight: 600;
}

.page-about .ab-rstep__t {
  margin: 0;
  font-size: .98rem;
  font-weight: 700;
}

.page-about .ab-rstep__d {
  margin: .35rem 0 0;
  color: var(--mist);
  font-size: .86rem;
  line-height: 1.7;
}

.page-about .ab-release .ab-media {
  margin-top: 0;
}

/* ---------- 服务范围 ---------- */
.page-about .ab-paper {
  margin-top: 1.4rem;
  padding: clamp(1.1rem, 4vw, 2rem);
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--paper);
}

.page-about .ab-paper__lead {
  margin: 0;
  font-size: .98rem;
  line-height: 1.78;
  max-width: 58ch;
}

.page-about .ab-paper__list {
  list-style: none;
  margin: 1.2rem 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(11, 15, 13, .16);
  border-top: 1px solid rgba(11, 15, 13, .16);
  border-bottom: 1px solid rgba(11, 15, 13, .16);
}

.page-about .ab-paper__list li {
  display: grid;
  gap: .2rem;
  padding: .7rem 0;
  background: var(--paper);
  font-size: .88rem;
  line-height: 1.6;
}

.page-about .ab-paper__list .sk-mono {
  color: #3d4a42;
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.page-about .ab-paper .sk-btn--ember {
  color: var(--ink);
  background: var(--ember);
  border-color: var(--ember);
  font-weight: 700;
}

.page-about .ab-paper .sk-btn--ember:hover,
.page-about .ab-paper .sk-btn--ember:focus-visible {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

/* ---------- 生态图 ---------- */
.page-about .ab-net {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-top: 1.4rem;
  border: var(--rule);
  background: radial-gradient(circle at 50% 50%, rgba(14, 42, 32, .9), var(--ink) 72%);
}

.page-about .ab-net__link {
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}

.page-about .ab-net__node {
  fill: var(--panel);
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .ab-net__core {
  fill: var(--moss);
  stroke: var(--lime);
  stroke-width: 1.5;
}

.page-about .ab-net__label {
  fill: var(--paper);
  font-family: var(--font-body);
  font-size: 13px;
  text-anchor: middle;
}

.page-about .ab-net__label--dim {
  fill: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
}

.page-about .ab-net__label--core {
  fill: var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

/* ---------- 结尾行动 ---------- */
.page-about .ab-cta {
  border-top: var(--rule);
  background: linear-gradient(140deg, var(--moss) 0%, var(--ink) 62%);
  padding-block: clamp(2.25rem, 6vw, 3.75rem);
}

.page-about .ab-cta__grid {
  display: grid;
  gap: 1.5rem;
  align-items: end;
}

.page-about .ab-cta__title {
  margin: .55rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 5vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -.02em;
}

.page-about .ab-cta__p {
  margin: .75rem 0 0;
  color: var(--mist);
  font-size: .95rem;
  line-height: 1.75;
  max-width: 48ch;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .ab-points {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-paper__list li {
    grid-template-columns: 7.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: .75rem;
  }
}

@media (min-width: 760px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(1.5rem, 3vw, 2.75rem);
  }

  .page-about .ab-hero__stats {
    background: transparent;
  }

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

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

  .page-about .ab-release {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
    align-items: start;
  }

  .page-about .ab-release .ab-media {
    margin-top: 0;
  }

  .page-about .ab-cta__grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-body {
    grid-template-columns: 246px minmax(0, 1fr);
    gap: clamp(1.75rem, 3.5vw, 3.5rem);
    align-items: start;
  }

  .page-about .ab-rail {
    position: sticky;
    top: 6.5rem;
  }

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

@media (min-width: 1200px) {
  .page-about .ab-body {
    grid-template-columns: 268px minmax(0, 1fr);
  }

  .page-about .ab-section {
    padding-block: clamp(2.5rem, 4vw, 3.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-rail__nav a,
  .page-about .ab-timeline__item::before {
    transition: none;
  }
}
<<<END>>>