.page-about{
  --about-line:rgba(244,241,236,.16);
  --about-line-soft:rgba(244,241,236,.09);
  --about-card:rgba(11,11,13,.58);
  position:relative;
  overflow-x:hidden;
  color:var(--paper);
  background:
    radial-gradient(1000px 620px at 106% -6%, rgba(200,16,46,.32), transparent 62%),
    radial-gradient(820px 520px at -14% 28%, rgba(45,125,255,.14), transparent 64%),
    linear-gradient(172deg, var(--ink) 0%, var(--ink-2) 52%, var(--ink-3) 100%);
}
.page-about .wrap{position:relative}

/* 面包屑 */
.page-about .breadcrumb{margin:0 0 clamp(20px,4vw,38px)}
.page-about .breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0;padding:0;list-style:none;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--gray);
}
.page-about .breadcrumb__link{
  color:var(--ice);text-decoration:none;border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible{color:var(--paper);border-bottom-color:var(--red)}
.page-about .about-crumb-sep{color:var(--red)}
.page-about .about-crumb-current{color:var(--paper)}

/* 封面 */
.page-about .about-cover{
  position:relative;
  padding:clamp(22px,4vw,42px) 0 clamp(36px,6vw,68px);
}
.page-about .about-cover::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--red) 0%,rgba(200,16,46,.35) 38%,transparent 82%);
  transform:rotate(-1.2deg);transform-origin:left center;pointer-events:none;
}
.page-about .about-cover__grid{display:grid;gap:clamp(24px,4vw,44px)}
.page-about .about-cover__lead .eyebrow{
  margin:0 0 14px;font-family:var(--font-mono);font-size:.72rem;
  letter-spacing:.16em;text-transform:uppercase;color:var(--blue);
}
.page-about .about-cover__title{
  margin:0 0 20px;
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(2.15rem,8.6vw,4.9rem);
  line-height:.99;letter-spacing:-.02em;color:var(--paper);
}
.page-about .about-cover__title .accent{color:var(--red);font-style:italic;font-weight:600}
.page-about .about-cover__lede{
  max-width:54ch;font-size:clamp(.98rem,2.4vw,1.1rem);line-height:1.75;color:rgba(244,241,236,.84);
}
.page-about .about-cover__media{
  margin:0;position:relative;
  border:2px solid var(--about-line);
  box-shadow:var(--shadow-2);
  background:var(--ink-2);
}
.page-about .about-cover__media img{
  display:block;width:100%;height:auto;aspect-ratio:14/9;object-fit:cover;
}
.page-about .about-cover__media .media__caption,
.page-about .about-ops__media .media__caption,
.page-about .about-scope__media .media__caption{
  display:block;padding:10px 12px;border-top:2px solid var(--about-line);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;line-height:1.6;color:var(--gray);
}

.page-about .about-cover__index{
  display:grid;gap:14px;margin:clamp(28px,5vw,46px) 0 0;padding:18px 0 0;
  list-style:none;border-top:2px solid var(--about-line);
}
.page-about .about-cover__index li{
  display:flex;align-items:baseline;gap:12px;
  font-size:.86rem;line-height:1.5;color:var(--gray);
}
.page-about .about-cover__idx{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(1.45rem,4vw,2.05rem);line-height:1;color:var(--paper);
}

/* 章节骨架 */
.page-about .about-chapter{position:relative;padding:clamp(40px,6.5vw,84px) 0}
.page-about .about-chapter__inner{width:100%}
.page-about .about-band{
  display:flex;align-items:baseline;gap:clamp(10px,2vw,18px);
  padding-top:10px;margin-bottom:clamp(18px,3vw,28px);
  border-top:3px solid var(--red);
}
.page-about .about-chapter--narrow .about-band{border-top-width:6px}
.page-about .about-band--plain{border-top-color:var(--about-line)}
.page-about .about-band__num{
  font-family:var(--font-mono);font-weight:700;letter-spacing:.04em;
  font-size:clamp(1.4rem,3.6vw,2.1rem);line-height:1;color:var(--red);
}
.page-about .about-band__label{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--gray);
}
.page-about .about-chapter__head{margin-bottom:clamp(22px,3.5vw,38px)}
.page-about .about-chapter__title{
  margin:0 0 14px;
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(1.75rem,5.4vw,3.3rem);line-height:1.07;letter-spacing:-.015em;color:var(--paper);
}
.page-about .about-chapter__intro{
  max-width:60ch;margin:0;font-size:clamp(.95rem,2.2vw,1.05rem);line-height:1.75;
  color:rgba(244,241,236,.76);
}
.page-about .about-chapter__body p{
  margin:0 0 1.05em;font-size:clamp(.95rem,2.3vw,1.02rem);line-height:1.78;
  color:rgba(244,241,236,.82);
}
.page-about .about-chapter__body p:last-child{margin-bottom:0}

/* 01 品牌起点 */
.page-about .about-origin{display:grid;gap:clamp(22px,3.5vw,34px)}
.page-about .about-origin__points{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.page-about .about-point{
  padding:14px 16px;border-left:2px solid var(--red);
  background:linear-gradient(90deg,rgba(200,16,46,.12),rgba(11,11,13,.15) 72%);
}
.page-about .about-point:nth-child(2){
  border-left-color:var(--blue);
  background:linear-gradient(90deg,rgba(45,125,255,.14),rgba(11,11,13,.15) 72%);
}
.page-about .about-point:nth-child(3){
  border-left-color:var(--lime);
  background:linear-gradient(90deg,rgba(182,255,59,.12),rgba(11,11,13,.15) 72%);
}
.page-about .about-point__k{
  margin:0 0 6px;font-size:.95rem;font-weight:700;letter-spacing:.02em;color:var(--paper);
}
.page-about .about-point__v{
  margin:0;font-size:.88rem;line-height:1.7;color:rgba(244,241,236,.74);
}

/* 02 运营节奏 */
.page-about .about-ops{display:grid;gap:clamp(20px,3vw,30px)}
.page-about .about-ops__media{
  margin:0;border:2px solid var(--about-line);box-shadow:var(--shadow-1);background:var(--ink-2);
}
.page-about .about-ops__media img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}

.page-about .about-accordion{margin-top:clamp(22px,3.5vw,34px);border-top:2px solid var(--about-line)}
.page-about .about-accordion .accordion__item{border-bottom:2px solid var(--about-line)}
.page-about .about-accordion__h{margin:0;font-size:1rem}
.page-about .about-accordion .accordion__trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:14px;
  padding:15px 2px;border:0;background:none;cursor:pointer;
  font:inherit;font-size:.96rem;font-weight:600;text-align:left;color:var(--paper);
  transition:color .18s var(--ease);
}
.page-about .about-accordion .accordion__trigger::after{
  content:"+";flex:0 0 auto;font-family:var(--font-mono);font-size:1.15rem;
  line-height:1;color:var(--red);
}
.page-about .about-accordion .accordion__trigger[aria-expanded="true"]::after{content:"–"}
.page-about .about-accordion .accordion__trigger:hover,
.page-about .about-accordion .accordion__trigger:focus-visible{color:var(--ice)}
.page-about .about-accordion .accordion__panel{padding:0 2px 18px}
.page-about .about-accordion .accordion__panel p{
  margin:0;font-size:.9rem;line-height:1.78;color:rgba(244,241,236,.74);
}

/* 03 版本服务 */
.page-about .about-version-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.page-about .about-version{
  position:relative;padding:18px 16px 18px 20px;
  border:2px solid var(--about-line);background:var(--about-card);
  box-shadow:var(--shadow-1);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.page-about .about-version::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--red);
}
.page-about .about-version:hover{border-color:rgba(200,16,46,.65);transform:translateY(-2px)}
.page-about .about-version__title{
  margin:0 0 8px;font-size:1rem;font-weight:700;letter-spacing:.01em;color:var(--paper);
}
.page-about .about-version__text{
  margin:0 0 12px;font-size:.88rem;line-height:1.75;color:rgba(244,241,236,.74);
}
.page-about .about-version__link{
  display:inline-block;font-family:var(--font-mono);font-size:.74rem;
  letter-spacing:.08em;color:var(--blue);text-decoration:none;
  border-bottom:1px solid rgba(45,125,255,.45);transition:color .18s var(--ease),border-color .18s var(--ease);
}
.page-about .about-version__link:hover,
.page-about .about-version__link:focus-visible{color:var(--ice);border-bottom-color:var(--ice)}

/* 04 团队 */
.page-about .about-stats{
  list-style:none;margin:0 0 clamp(24px,4vw,36px);padding:0;
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;
}
.page-about .about-stat{
  padding:16px 14px;border:2px solid var(--about-line);background:var(--about-card);
  box-shadow:var(--shadow-1);
}
.page-about .about-stat--red{
  border-color:var(--red);
  background:linear-gradient(158deg,rgba(200,16,46,.28),rgba(11,11,13,.72) 78%);
}
.page-about .about-stat__num{
  display:block;font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(1.9rem,6vw,2.7rem);line-height:1;color:var(--paper);
}
.page-about .about-stat__label{
  display:block;margin-top:9px;font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.1em;line-height:1.5;text-transform:uppercase;color:var(--gray);
}
.page-about .about-tabs .tablist{
  display:flex;flex-wrap:wrap;gap:8px;margin:0 0 clamp(18px,3vw,26px);padding:0 0 14px;
  border:0;border-bottom:2px solid var(--about-line);
}
.page-about .about-tabs .tab{
  padding:9px 14px;border:2px solid var(--about-line);background:transparent;
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;color:rgba(244,241,236,.76);
  cursor:pointer;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.page-about .about-tabs .tab:hover{color:var(--paper);border-color:rgba(45,125,255,.7)}
.page-about .about-tabs .tab[aria-selected="true"]{
  background:var(--red);border-color:var(--red);color:var(--paper);
}
.page-about .about-tabs .tabpanel{padding:0;outline-offset:4px}
.page-about .about-tabs .tabpanel p{
  margin:0;max-width:66ch;font-size:clamp(.93rem,2.3vw,1rem);line-height:1.78;
  color:rgba(244,241,236,.82);
}

/* 05 阶段节点 */
.page-about .about-phases{
  position:relative;list-style:none;margin:0;padding:0;
}
.page-about .about-phases::before{
  content:"";position:absolute;left:8px;top:8px;bottom:10px;width:2px;
  background:linear-gradient(180deg,var(--red),var(--blue) 58%,var(--lime));
}
.page-about .about-phase{
  position:relative;padding:0 0 clamp(20px,3.4vw,30px) 34px;
}
.page-about .about-phase::before{
  content:"";position:absolute;left:2px;top:5px;width:12px;height:12px;
  background:var(--ink);border:2px solid var(--lime);transform:rotate(45deg);
}
.page-about .about-phase:last-child::before{border-color:var(--red)}
.page-about .about-phase__label{
  margin:0 0 6px;font-family:var(--font-mono);font-size:.7rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--red);
}
.page-about .about-phase__title{
  margin:0 0 8px;font-size:clamp(1rem,2.6vw,1.14rem);font-weight:700;color:var(--paper);
}
.page-about .about-phase__text{
  margin:0;font-size:.9rem;line-height:1.75;color:rgba(244,241,236,.74);
}
.page-about .about-phase-back{margin:clamp(18px,3vw,26px) 0 0;padding-left:34px}
.page-about .about-phase-back a{
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;
  color:var(--blue);text-decoration:none;border-bottom:1px solid rgba(45,125,255,.45);
}
.page-about .about-phase-back a:hover,
.page-about .about-phase-back a:focus-visible{color:var(--ice);border-bottom-color:var(--ice)}

/* 服务范围 */
.page-about .about-scope{display:grid;gap:clamp(22px,3.5vw,38px)}
.page-about .about-scope__main .about-chapter__title{margin-bottom:clamp(18px,3vw,28px)}
.page-about .about-scenes{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.page-about .about-scene{
  padding:16px 16px 16px 18px;border:2px solid var(--about-line);
  border-left:4px solid var(--blue);background:rgba(21,22,26,.66);
}
.page-about .about-scene:nth-child(2){border-left-color:var(--red)}
.page-about .about-scene:nth-child(3){border-left-color:var(--lime)}
.page-about .about-scene__title{
  margin:0 0 7px;font-size:.98rem;font-weight:700;color:var(--paper);
}
.page-about .about-scene__text{
  margin:0;font-size:.88rem;line-height:1.75;color:rgba(244,241,236,.74);
}
.page-about .about-scope__media{
  margin:0;border:2px solid var(--about-line);box-shadow:var(--shadow-2);background:var(--ink-2);
}
.page-about .about-scope__media img{
  display:block;width:100%;height:auto;aspect-ratio:4/5;object-fit:cover;
}

/* CTA */
.page-about .about-cta{
  margin-top:clamp(28px,4.5vw,44px);padding:clamp(18px,3vw,30px);
  display:grid;gap:18px;
  border:2px solid var(--red);box-shadow:var(--shadow-2);
  background:linear-gradient(148deg,rgba(200,16,46,.2),rgba(11,11,13,.88) 74%);
}
.page-about .about-cta__title{
  margin:0 0 8px;font-size:clamp(1.05rem,2.8vw,1.3rem);font-weight:700;color:var(--paper);
}
.page-about .about-cta__text{
  margin:0;font-size:.88rem;line-height:1.7;color:rgba(244,241,236,.76);
}
.page-about .about-cta__actions{display:flex;flex-wrap:wrap;gap:10px}
.page-about .about-cta__actions .btn{white-space:nowrap}

/* 焦点可见性 */
.page-about a:focus-visible,
.page-about button:focus-visible{
  outline:2px solid var(--lime);outline-offset:3px;
}

/* 断点 */
@media (min-width:560px){
  .page-about .about-version-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .page-about .about-version:first-child{grid-column:1 / -1}
}

@media (min-width:720px){
  .page-about .about-cover__index{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
  .page-about .about-stats{grid-template-columns:repeat(4,minmax(0,1fr))}
  .page-about .about-cta{grid-template-columns:minmax(0,1fr) auto;align-items:center}
  .page-about .about-cta__actions{justify-content:flex-end}
}

@media (min-width:860px){
  .page-about .about-cover__grid{
    grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
    align-items:end;gap:clamp(30px,4vw,54px);
  }
  .page-about .about-cover__media{transform:translateY(34px)}
  .page-about .about-origin{
    grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
    gap:clamp(28px,4vw,56px);
  }
  .page-about .about-ops{
    grid-template-columns:minmax(0,1fr) minmax(0,.82fr);
    align-items:start;gap:clamp(28px,4vw,48px);
  }
  .page-about .about-scope{
    grid-template-columns:minmax(0,1fr) minmax(0,.66fr);
    align-items:start;gap:clamp(28px,4vw,52px);
  }
  .page-about .about-version-list{grid-template-columns:repeat(3,minmax(0,1fr))}
  .page-about .about-version:first-child{grid-column:auto}
}

@media (min-width:1000px){
  .page-about .about-chapter--narrow .about-chapter__inner{max-width:760px}
  .page-about .about-chapter--narrow{padding-block:clamp(52px,6vw,92px)}
}

@media (prefers-reduced-motion:reduce){
  .page-about .about-version,
  .page-about .about-cover__media,
  .page-about .about-accordion .accordion__trigger,
  .page-about .tab{transition:none}
  .page-about .about-version:hover{transform:none}
  .page-about .about-cover__media{transform:none}
}
<<<END>>>