.page-about{
  --ab-hair:rgba(143,187,255,.16);
  --ab-hair-2:rgba(143,187,255,.32);
  --ab-soft:rgba(243,247,255,.72);
  --ab-ink:#0B0F1A;
  --ab-ink-soft:rgba(11,15,26,.74);
  --ab-ink-hair:rgba(11,15,26,.12);
  color:var(--c-cloud);
  font-family:var(--font-sans);
  background:var(--c-black);
}
.page-about *,
.page-about *::before,
.page-about *::after{box-sizing:border-box}
.page-about img{display:block;max-width:100%;height:auto}
.page-about figure{margin:0}
.page-about a{color:inherit}
.page-about .ab-wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}

/* 面包屑 */
.page-about .crumbs{margin-bottom:clamp(18px,3.5vw,40px)}
.page-about .crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:0;padding:0;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--c-sky-soft)}
.page-about .crumbs li{display:flex;align-items:center;gap:8px}
.page-about .crumbs li+li::before{content:"/";color:rgba(143,187,255,.45)}
.page-about .crumbs a{text-decoration:none;color:var(--c-sky-soft)}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible{color:var(--c-white)}
.page-about .crumbs [aria-current]{color:var(--c-white)}

/* 首屏 */
.page-about .ab-hero{
  position:relative;
  padding-block:clamp(16px,3vw,26px) clamp(46px,7vw,90px);
  background:
    radial-gradient(115% 85% at 94% -12%,rgba(30,144,255,.26),transparent 62%),
    linear-gradient(180deg,var(--c-night),var(--c-black) 78%);
}
.page-about .ab-hero__grid{display:grid;gap:clamp(26px,4vw,48px);align-items:end}
.page-about .ab-eyebrow{
  margin:0;
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-sky-soft);
}
.page-about .ab-hero h1{
  margin:.4em 0 .55em;
  font-size:clamp(2rem,5.4vw,4rem);
  line-height:1.06;
  font-weight:300;
  letter-spacing:-.03em;
  color:var(--c-white);
  max-width:19ch;
}
.page-about .ab-lede{
  margin:0;
  font-size:clamp(.98rem,1.5vw,1.1rem);
  line-height:1.8;
  color:var(--ab-soft);
  max-width:58ch;
}
.page-about .ab-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(20px,3vw,30px)}
.page-about .ab-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px;
  margin:clamp(26px,4vw,42px) 0 0;
  padding:20px 0 0;
  list-style:none;
  border-top:1px solid var(--ab-hair);
}
.page-about .ab-stat__num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(1.25rem,3vw,1.7rem);
  font-weight:600;
  letter-spacing:-.02em;
  color:var(--c-sky);
}
.page-about .ab-stat--timer .ab-stat__num{color:var(--c-timer)}
.page-about .ab-stat__suffix{font-size:.55em;font-weight:500;margin-left:2px;color:var(--c-sky-soft)}
.page-about .ab-stat__label{display:block;margin-top:6px;font-size:.76rem;line-height:1.55;color:var(--ab-soft)}
.page-about .ab-hero__media{position:relative}
.page-about .ab-hero__media img{width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-lift)}
.page-about .ab-hero__media::after{
  content:"";
  position:absolute;
  inset:14px -14px -14px 14px;
  border:1px solid var(--ab-hair-2);
  border-radius:calc(var(--radius-lg) + 6px);
  pointer-events:none;
}
@media(min-width:920px){
  .page-about .ab-hero__grid{grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr)}
}

/* 章节骨架 */
.page-about .ab-band{position:relative;padding-block:clamp(46px,7vw,94px)}
.page-about .ab-band--plate{background:var(--c-black)}
.page-about .ab-band--ink{background:linear-gradient(180deg,var(--c-night),var(--c-black) 82%)}
.page-about .ab-band--steel{background:var(--c-steel)}
.page-about .ab-band--cloud{background:var(--c-cloud);color:var(--ab-ink)}
.page-about .ab-sec__head{display:grid;gap:8px;margin-bottom:clamp(24px,4vw,44px);max-width:72ch}
.page-about .ab-no{
  margin:0;
  font-family:var(--font-mono);
  font-size:clamp(2.4rem,7vw,4.6rem);
  font-weight:200;
  line-height:.92;
  letter-spacing:-.04em;
  color:rgba(143,187,255,.4);
}
.page-about .ab-label{
  margin:0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.2em;
  color:var(--c-sky-soft);
}
.page-about .ab-sec__head h2{
  margin:.1em 0 .3em;
  font-size:clamp(1.5rem,3.4vw,2.45rem);
  font-weight:400;
  line-height:1.24;
  letter-spacing:-.02em;
  color:var(--c-white);
}

/* 浅色带文字 */
.page-about .ab-band--cloud h2,
.page-about .ab-band--cloud h3{color:var(--ab-ink)}
.page-about .ab-band--cloud .ab-no{color:rgba(30,144,255,.42)}
.page-about .ab-band--cloud .ab-label{color:var(--c-timer-deep)}
.page-about .ab-band--cloud .ab-lede,
.page-about .ab-band--cloud .ab-step p,
.page-about .ab-band--cloud .ab-role p{color:var(--ab-ink-soft)}

/* 起点 */
.page-about .ab-split{display:grid;gap:clamp(24px,4vw,48px)}
@media(min-width:880px){
  .page-about .ab-split{grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);align-items:start}
}
.page-about .ab-prose p{margin:0 0 1.05em;font-size:.99rem;line-height:1.85;color:var(--ab-soft)}
.page-about .ab-prose p:last-child{margin-bottom:0}
.page-about .ab-prose strong{color:var(--c-white);font-weight:600}
.page-about .ab-prose a{color:var(--c-sky);text-decoration:none;border-bottom:1px solid rgba(30,144,255,.5)}
.page-about .ab-prose a:hover{color:var(--c-white);border-bottom-color:var(--c-white)}
.page-about .ab-prose--narrow{max-width:68ch}
.page-about .ab-facts{
  border:1px solid var(--ab-hair);
  border-radius:var(--radius-lg);
  padding:clamp(18px,3vw,28px);
  background:rgba(14,27,51,.72);
}
.page-about .ab-facts__title{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.18em;
  color:var(--c-stand);
}
.page-about .ab-facts dl{margin:0}
.page-about .ab-facts__row{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:4px 16px;
  padding:11px 0;
  border-top:1px solid var(--ab-hair);
  font-size:.88rem;
}
.page-about .ab-facts__row:first-child{border-top:0;padding-top:0}
.page-about .ab-facts__row dt{color:var(--c-sky-soft);margin:0}
.page-about .ab-facts__row dd{margin:0;font-family:var(--font-mono);color:var(--c-white)}

/* 三模块 */
.page-about .ab-plan{
  margin:0 0 clamp(26px,4vw,46px);
  padding:clamp(14px,3vw,26px);
  border:1px solid var(--ab-hair);
  border-radius:var(--radius-lg);
  background:rgba(6,16,36,.6);
}
.page-about .ab-plan__svg{width:100%;height:auto;display:block}
.page-about .ab-plan__cap{
  margin:12px 0 0;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.1em;
  color:var(--c-sky-soft);
  text-align:center;
}
.page-about .ab-svg__line--sky{stroke:var(--c-sky)}
.page-about .ab-svg__line--stand{stroke:var(--c-stand)}
.page-about .ab-svg__line--timer{stroke:var(--c-timer)}
.page-about .ab-svg__end--sky{fill:var(--c-sky)}
.page-about .ab-svg__end--stand{fill:var(--c-stand)}
.page-about .ab-svg__end--timer{fill:var(--c-timer)}
.page-about .ab-svg__t{
  fill:rgba(243,247,255,.66);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
}
.page-about .ab-mods{border-top:1px solid var(--ab-hair)}
.page-about .ab-mod{
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
  padding:clamp(20px,3vw,32px) 0;
  border-bottom:1px solid var(--ab-hair);
}
.page-about .ab-mod__no{
  margin:0;
  font-family:var(--font-mono);
  font-size:1.45rem;
  font-weight:600;
  line-height:1;
  color:var(--c-sky-soft);
}
.page-about .ab-mod--key .ab-mod__no{color:var(--c-stand)}
.page-about .ab-mod h3{
  margin:0 0 .4em;
  font-size:clamp(1.08rem,2.2vw,1.32rem);
  font-weight:600;
  letter-spacing:-.01em;
  color:var(--c-white);
}
.page-about .ab-mod__body p{margin:0;font-size:.96rem;line-height:1.8;color:var(--ab-soft);max-width:62ch}
.page-about .ab-mod__act{margin:2px 0 0}
.page-about .ab-mod__meta{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--c-timer);
}
@media(min-width:860px){
  .page-about .ab-mod{
    grid-template-columns:76px minmax(0,1fr) 170px;
    column-gap:clamp(18px,3vw,40px);
    align-items:start;
  }
  .page-about .ab-mod__act{justify-self:end}
}

/* 团队 */
.page-about .ab-team{display:grid;gap:clamp(24px,4vw,44px)}
@media(min-width:900px){
  .page-about .ab-team{grid-template-columns:minmax(0,.88fr) minmax(0,1.12fr);align-items:start}
}
.page-about .ab-team__media img{
  width:100%;
  border-radius:var(--radius-lg);
  box-shadow:0 30px 60px -40px rgba(11,15,26,.6);
}
.page-about .ab-role{padding:14px 0;border-bottom:1px solid var(--ab-ink-hair)}
.page-about .ab-role:first-child{padding-top:0}
.page-about .ab-role__name{
  margin:0 0 4px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  color:var(--c-timer-deep);
}
.page-about .ab-role p{margin:0;font-size:.94rem;line-height:1.75}
.page-about .ab-steps{list-style:none;margin:clamp(20px,3vw,28px) 0 0;padding:0}
.page-about .ab-step{
  display:grid;
  grid-template-columns:40px minmax(0,1fr);
  gap:clamp(10px,2vw,18px);
  padding:16px 0;
  border-top:1px solid var(--ab-ink-hair);
}
.page-about .ab-step__no{
  font-family:var(--font-mono);
  font-size:.9rem;
  font-weight:600;
  line-height:1.6;
  color:var(--c-steel);
}
.page-about .ab-step h3{
  margin:0 0 3px;
  font-size:1rem;
  font-weight:600;
  color:var(--ab-ink);
}
.page-about .ab-step p{margin:0;font-size:.92rem;line-height:1.72}

/* 时间线 */
.page-about .ab-band__photo{
  margin:0 0 clamp(24px,4vw,44px);
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--ab-hair);
}
.page-about .ab-band__photo img{width:100%;object-fit:cover}
.page-about .ab-tl{display:grid;gap:clamp(18px,3vw,32px)}
@media(min-width:920px){
  .page-about .ab-tl{grid-template-columns:150px minmax(0,1fr);align-items:start}
}
.page-about .ab-rail{
  display:flex;
  gap:8px;
  overflow-x:auto;
  padding-bottom:8px;
}
.page-about .ab-rail__link{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:54px;
  padding:8px 14px;
  border-radius:var(--radius-pill);
  border:1px solid var(--ab-hair-2);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  text-decoration:none;
  color:var(--c-sky-soft);
  transition:color .2s,border-color .2s,background .2s;
}
.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible{color:var(--c-white);border-color:var(--c-sky)}
.page-about .ab-rail__link[data-current]{
  color:var(--c-stand);
  border-color:var(--c-stand);
  background:rgba(255,107,44,.12);
}
@media(min-width:920px){
  .page-about .ab-rail{
    position:sticky;
    top:calc(var(--header-h) + 20px);
    align-self:start;
    flex-direction:column;
    overflow:visible;
    padding-bottom:0;
  }
}
.page-about .ab-node{
  margin-bottom:14px;
  padding:clamp(18px,3vw,28px);
  border:1px solid var(--ab-hair);
  border-radius:var(--radius-lg);
  background:linear-gradient(140deg,rgba(14,27,51,.88),rgba(6,16,36,.58));
  transition:border-color .25s,background .25s;
}
.page-about .ab-node:last-child{margin-bottom:0}
.page-about .ab-node[data-current]{
  border-color:var(--c-stand);
  background:linear-gradient(140deg,rgba(255,107,44,.16),rgba(6,16,36,.62));
}
.page-about .ab-node__tag{
  margin:0 0 6px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  color:var(--c-timer);
}
.page-about .ab-node h3{
  margin:0 0 .5em;
  font-size:clamp(1.05rem,2.2vw,1.28rem);
  font-weight:600;
  color:var(--c-white);
}
.page-about .ab-node__text{margin:0;font-size:.94rem;line-height:1.8;color:var(--ab-soft)}

/* 覆盖范围 */
.page-about .ab-chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0 0 clamp(22px,4vw,36px);
  padding:0;
  list-style:none;
}
.page-about .ab-chip{
  border:1px solid var(--ab-hair-2);
  border-radius:var(--radius-pill);
  padding:7px 15px;
  font-size:.84rem;
  color:var(--c-cloud);
  background:rgba(30,144,255,.09);
}
.page-about .ab-metrics{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  margin:0 0 clamp(26px,4vw,44px);
  border:1px solid var(--ab-hair);
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:var(--ab-hair);
}
.page-about .ab-metric{background:var(--c-black);padding:clamp(16px,3vw,26px)}
.page-about .ab-metric__num{
  margin:0;
  font-family:var(--font-mono);
  font-size:clamp(1.5rem,4vw,2.3rem);
  font-weight:600;
  letter-spacing:-.03em;
  color:var(--c-sky);
}
.page-about .ab-metric--stand .ab-metric__num{color:var(--c-stand)}
.page-about .ab-metric--timer .ab-metric__num{color:var(--c-timer)}
.page-about .ab-metric__label{margin:8px 0 0;font-size:.8rem;line-height:1.62;color:var(--ab-soft)}
@media(min-width:760px){
  .page-about .ab-metrics{grid-template-columns:1fr 1.25fr 1.1fr .9fr}
}

/* 联系 */
.page-about .ab-contact{display:grid;gap:clamp(22px,4vw,40px)}
@media(min-width:880px){
  .page-about .ab-contact{grid-template-columns:minmax(0,1fr) minmax(0,.85fr);align-items:start}
}
.page-about .ab-contact__cta{margin-top:clamp(18px,3vw,26px)}
.page-about .ab-contact__card{
  border:1px solid var(--ab-hair-2);
  border-radius:var(--radius-lg);
  padding:clamp(18px,3vw,30px);
  background:linear-gradient(150deg,rgba(30,144,255,.18),rgba(255,107,44,.1) 85%);
}
.page-about .ab-contact__item{
  display:flex;
  flex-wrap:wrap;
  gap:4px 14px;
  margin:0;
  padding:11px 0;
  border-top:1px solid var(--ab-hair);
  font-size:.9rem;
}
.page-about .ab-contact__item:first-child{border-top:0;padding-top:0}
.page-about .ab-contact__k{
  min-width:68px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  color:var(--c-sky-soft);
}
.page-about .ab-contact__v{
  font-family:var(--font-mono);
  color:var(--c-white);
  word-break:break-word;
}

@media(prefers-reduced-motion:reduce){
  .page-about .ab-rail__link,
  .page-about .ab-node{transition:none}
}
<<<END>>>