.page-about{
  --about-rot:-2.4deg;
  --about-angle:135deg;
  position:relative;
  color:var(--color-text);
  font-family:var(--font-body);
  line-height:1.6;
  background:
    linear-gradient(rgba(31,58,77,.28) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,58,77,.28) 1px,transparent 1px),
    var(--color-bg);
  background-size:36px 36px;
  overflow:clip;
}
.page-about .num{
  font-family:var(--font-number);
  font-variant-numeric:tabular-nums;
}
.page-about .breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  padding:14px 20px 0;
  max-width:1280px;
  margin:0 auto;
  font-family:var(--font-number);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--color-text-secondary);
}
.page-about .breadcrumb a{
  color:var(--color-text-secondary);
  text-decoration:none;
  transition:color .2s ease;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible{
  color:var(--color-accent);
}
.page-about .breadcrumb__sep{
  color:var(--color-grid);
}
.page-about .breadcrumb__item[aria-current="page"]{
  color:var(--color-text);
}
.page-about .section-label{
  display:inline-block;
  font-family:var(--font-number);
  font-size:13px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--color-accent);
  border:1px solid var(--color-grid);
  padding:5px 10px;
  background:rgba(10,26,47,.72);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
  margin-bottom:14px;
}
.page-about h1,
.page-about h2,
.page-about h3{
  font-family:var(--font-headline);
  font-weight:900;
  margin:0;
  color:var(--color-text);
}
.page-about h1{
  font-size:clamp(38px,7vw,72px);
  line-height:1.06;
  letter-spacing:.02em;
}
.page-about h2{
  font-size:clamp(26px,4.2vw,44px);
  line-height:1.15;
}
.page-about h3{
  font-size:19px;
  line-height:1.3;
}
.page-about p{
  margin:0;
}
.page-about .about-hero{
  position:relative;
  padding:30px 20px 58px;
  background:linear-gradient(var(--about-angle),var(--color-indigo) 0%,rgba(61,46,140,.22) 38%,var(--color-bg-secondary) 76%);
  clip-path:polygon(0 0,100% 0,100% 88%,0 100%);
}
.page-about .about-hero__inner{
  max-width:1280px;
  margin:0 auto;
  display:grid;
  gap:28px;
}
.page-about .about-hero__main{
  max-width:760px;
}
.page-about .about-hero__statement{
  margin-top:14px;
  font-family:var(--font-headline);
  font-weight:700;
  font-size:clamp(18px,2.6vw,24px);
  color:var(--color-accent-orange);
  letter-spacing:.04em;
}
.page-about .about-hero__lead{
  margin-top:18px;
  max-width:64ch;
  font-size:16px;
  color:var(--color-text-secondary);
  border-left:3px solid var(--color-accent);
  padding-left:16px;
}
.page-about .about-hero__lead .num{
  color:var(--color-accent);
  font-weight:700;
}
.page-about .about-hero__tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.page-about .about-hero__side{
  border:1px solid var(--color-grid);
  background:rgba(17,34,51,.72);
  backdrop-filter:blur(4px);
  clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,0 100%);
  padding:16px;
}
.page-about .hero-status{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-number);
  font-size:12px;
  color:var(--color-accent);
  letter-spacing:.08em;
  border-bottom:1px solid var(--color-grid);
  padding-bottom:10px;
  margin-bottom:6px;
}
.page-about .hero-status .sys-status__dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--color-accent);
  box-shadow:0 0 0 3px rgba(198,255,0,.22),0 0 12px rgba(198,255,0,.6);
  animation:about-pulse 2s ease-in-out infinite;
}
@keyframes about-pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.55;transform:scale(.82)}
}
.page-about .hero-stats{
  display:grid;
  grid-template-columns:1fr 1fr;
  margin:0;
}
.page-about .hero-stats__row{
  position:relative;
  border-bottom:1px solid var(--color-grid);
  border-right:1px solid var(--color-grid);
  padding:12px 10px;
  margin:0;
}
.page-about .hero-stats__row:nth-child(even){
  border-right:0;
}
.page-about .hero-stats dt{
  font-size:12px;
  color:var(--color-text-secondary);
  display:flex;
  align-items:center;
  gap:6px;
}
.page-about .hero-stats dd{
  font-family:var(--font-number);
  font-size:24px;
  font-weight:700;
  margin:6px 0 0;
  color:var(--color-text);
}
.page-about .hero-stats dd .num{
  color:var(--color-accent);
}
.page-about .hero-stats__tip{
  display:block;
  font-family:var(--font-body);
  font-size:11px;
  line-height:1.5;
  color:var(--color-text-secondary);
  border-left:2px solid var(--color-accent-orange);
  padding-left:8px;
  margin-top:8px;
  background:rgba(10,26,47,.8);
  border:1px solid var(--color-grid);
  border-left:3px solid var(--color-accent-orange);
  padding:6px 8px;
}
.page-about .about-metrics{
  position:relative;
  z-index:2;
  margin:-26px 20px 0;
  max-width:1280px;
  display:grid;
  grid-template-columns:1fr 1fr;
  background:var(--color-card);
  border:1px solid var(--color-grid);
  box-shadow:0 18px 40px rgba(0,0,0,.32);
}
.page-about .about-metrics__item{
  padding:16px 14px;
  border-bottom:1px solid var(--color-grid);
  border-right:1px solid var(--color-grid);
}
.page-about .about-metrics__item:nth-child(2n){
  border-right:0;
}
.page-about .about-metrics__num{
  display:block;
  font-family:var(--font-number);
  font-size:26px;
  font-weight:700;
  color:var(--color-accent);
  line-height:1.2;
}
.page-about .about-metrics__label{
  display:block;
  margin-top:4px;
  font-size:13px;
  color:var(--color-text-secondary);
}
.page-about .about-section{
  position:relative;
  padding:52px 20px;
  max-width:1280px;
  margin:0 auto;
}
.page-about .about-section__head{
  max-width:780px;
  margin-bottom:28px;
  padding-left:2px;
}
.page-about .about-section__head h2{
  margin-top:4px;
}
.page-about .about-section__intro{
  margin-top:14px;
  font-size:16px;
  color:var(--color-text-secondary);
  line-height:1.7;
}
.page-about .section-index{
  display:inline-block;
  font-family:var(--font-number);
  font-size:13px;
  letter-spacing:.18em;
  color:var(--color-accent);
  background:rgba(10,26,47,.6);
  border:1px solid var(--color-grid);
  padding:4px 10px;
  margin-bottom:12px;
  clip-path:polygon(0 0,100% 0,calc(100% - 10px) 100%,0 100%);
}
.page-about .about-coverage__grid{
  display:grid;
  gap:22px;
  align-items:center;
}
.page-about .about-coverage__figure{
  margin:0;
  position:relative;
  border:1px solid var(--color-grid);
  box-shadow:12px 12px 0 rgba(0,0,0,.28);
  overflow:hidden;
}
.page-about .about-coverage__img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  filter:contrast(1.08) saturate(1.2);
}
.page-about .about-coverage__caption{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  background:var(--color-card);
  border-top:1px solid var(--color-grid);
  font-size:13px;
  color:var(--color-text-secondary);
  font-family:var(--font-number);
}
.page-about .about-coverage__stats{
  display:grid;
  gap:14px;
}
.page-about .coverage-stat{
  border-left:3px solid var(--color-accent);
  background:linear-gradient(90deg,rgba(198,255,0,.06),transparent 60%);
  padding:14px 16px;
  border-top:1px solid var(--color-grid);
  border-right:1px solid var(--color-grid);
  border-bottom:1px solid var(--color-grid);
}
.page-about .coverage-stat:nth-child(2){
  border-left-color:var(--color-accent-orange);
}
.page-about .coverage-stat:nth-child(3){
  border-left-color:var(--color-indigo);
}
.page-about .coverage-stat__num{
  display:block;
  font-family:var(--font-number);
  font-size:28px;
  font-weight:700;
  color:var(--color-accent);
  line-height:1.1;
}
.page-about .coverage-stat:nth-child(2) .coverage-stat__num{
  color:var(--color-accent-orange);
}
.page-about .coverage-stat:nth-child(3) .coverage-stat__num{
  color:var(--color-text);
}
.page-about .coverage-stat__desc{
  margin-top:8px;
  font-size:14px;
  line-height:1.65;
  color:var(--color-text-secondary);
}
.page-about .about-update{
  margin-top:42px;
  display:grid;
  gap:20px;
  padding:20px;
  border:1px solid var(--color-grid);
  background:linear-gradient(135deg,rgba(61,46,140,.28) 0%,transparent 58%),var(--color-card);
  clip-path:polygon(0 0,calc(100% - 20px) 0,100% 20px,100% 100%,0 100%);
}
.page-about .about-update__chart{
  margin:0;
}
.page-about .about-update__img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  border:1px solid var(--color-grid);
}
.page-about .about-update__caption{
  padding-top:8px;
  font-size:12px;
  color:var(--color-text-secondary);
  font-family:var(--font-number);
}
.page-about .about-update__text h3{
  color:var(--color-accent);
  margin-bottom:12px;
}
.page-about .about-update__text>p{
  font-size:15px;
  color:var(--color-text-secondary);
  line-height:1.75;
}
.lang-switch{
  margin-top:18px;
  border:1px solid var(--color-grid);
  background:rgba(10,26,47,.55);
}
.lang-switch__input{
  position:absolute;
  opacity:0;
  pointer-events:none;
}
.lang-switch__trigger{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  padding:12px 14px;
  cursor:pointer;
  border-bottom:1px solid var(--color-grid);
  background:var(--color-card);
  font-size:14px;
  color:var(--color-text);
  transition:background .2s ease;
}
.lang-switch__trigger:hover,
.lang-switch__trigger:focus-visible{
  background:rgba(198,255,0,.08);
}
.lang-switch__indicator{
  font-family:var(--font-number);
  font-size:12px;
  color:var(--color-accent);
  border:1px solid var(--color-accent);
  padding:2px 8px;
  letter-spacing:.08em;
}
.lang-switch__panel{
  padding:10px 14px;
}
.lang-switch__en{
  display:none;
}
.lang-switch__input:checked ~ .lang-switch__zh{
  display:none;
}
.lang-switch__input:checked ~ .lang-switch__en{
  display:block;
}
.lang-rows{
  margin:0;
}
.lang-rows__item{
  display:flex;
  justify-content:space-between;
  gap:14px;
  padding:9px 0;
  border-bottom:1px dashed var(--color-grid);
  font-size:13px;
}
.lang-rows__item:last-child{
  border-bottom:0;
}
.lang-rows dt{
  color:var(--color-text-secondary);
  font-family:var(--font-number);
  letter-spacing:.02em;
}
.lang-rows dd{
  margin:0;
  color:var(--color-text);
  text-align:right;
  font-family:var(--font-body);
}
.lang-rows dd .num{
  color:var(--color-accent);
  font-weight:700;
}
.page-about .about-timeline{
  border-top:1px solid var(--color-grid);
  border-bottom:1px solid var(--color-grid);
}
.page-about .about-timeline__layout{
  position:relative;
}
.page-about .about-timeline__decor{
  margin:0 auto 20px;
  max-width:150px;
  text-align:center;
}
.page-about .about-timeline__decor-img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  border-radius:50%;
  opacity:.62;
  filter:sepia(.28) hue-rotate(148deg) saturate(1.7) brightness(.9);
  border:1px solid var(--color-grid);
}
.page-about .about-timeline__decor figcaption{
  margin-top:8px;
  font-family:var(--font-number);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--color-text-secondary);
}
.page-about .timeline{
  list-style:none;
  margin:0;
  padding:0;
  position:relative;
}
.page-about .timeline::before{
  content:"";
  position:absolute;
  left:9px;
  top:0;
  bottom:0;
  width:2px;
  background:linear-gradient(180deg,var(--color-accent) 0%,var(--color-indigo) 52%,var(--color-wine) 100%);
}
.page-about .timeline__item{
  position:relative;
  margin:0;
  padding:0 0 18px 40px;
}
.page-about .timeline__marker{
  position:absolute;
  left:3px;
  top:18px;
  width:14px;
  height:14px;
  background:var(--color-accent);
  transform:rotate(45deg);
  box-shadow:0 0 0 4px var(--color-bg),0 0 0 6px var(--color-grid);
  z-index:1;
}
.page-about .timeline__item:nth-child(even) .timeline__marker{
  background:var(--color-accent-orange);
}
.page-about .timeline__card{
  background:var(--color-card);
  border:1px solid var(--color-grid);
  border-left:3px solid var(--color-accent);
  box-shadow:8px 8px 0 rgba(0,0,0,.2);
}
.page-about .timeline__item:nth-child(even) .timeline__card{
  border-left:1px solid var(--color-grid);
  border-right:3px solid var(--color-accent-orange);
}
.page-about .timeline__card summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  padding:14px 16px;
  font-family:var(--font-headline);
  font-weight:700;
  font-size:16px;
  color:var(--color-text);
  transition:background .2s ease;
}
.page-about .timeline__card summary::-webkit-details-marker{
  display:none;
}
.page-about .timeline__card summary:hover,
.page-about .timeline__card summary:focus-visible{
  background:rgba(198,255,0,.07);
}
.page-about .timeline__card summary::after{
  content:"+";
  font-family:var(--font-number);
  font-size:20px;
  color:var(--color-accent-orange);
  flex:0 0 auto;
}
.page-about .timeline__card[open] summary::after{
  content:"−";
  color:var(--color-accent);
}
.page-about .timeline__content{
  border-top:1px dashed var(--color-grid);
  padding:14px 16px 16px;
}
.page-about .timeline__content p{
  font-size:14px;
  line-height:1.7;
  color:var(--color-text-secondary);
  margin-bottom:12px;
}
.page-about .about-capability{
  border-bottom:1px solid var(--color-grid);
}
.page-about .about-capability__grid{
  display:grid;
  gap:16px;
}
.page-about .capability-card{
  position:relative;
  background:var(--color-card);
  border:1px solid var(--color-grid);
  padding:22px 18px 20px;
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
}
.page-about .capability-card::before{
  content:"";
  position:absolute;
  right:0;
  top:0;
  width:16px;
  height:16px;
  background:var(--color-accent);
  clip-path:polygon(0 0,100% 0,0 100%);
}
.page-about .capability-card:nth-child(2)::before{
  background:var(--color-accent-orange);
}
.page-about .capability-card:nth-child(3)::before{
  background:var(--color-indigo);
}
.page-about .capability-card:nth-child(4)::before{
  background:var(--color-wine);
}
.page-about .capability-card__index{
  display:inline-block;
  font-family:var(--font-number);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--color-accent);
  border:1px solid var(--color-grid);
  padding:3px 8px;
  margin-bottom:14px;
}
.page-about .capability-card h3{
  margin-bottom:10px;
}
.page-about .capability-card p{
  font-size:14px;
  line-height:1.7;
  color:var(--color-text-secondary);
}
.page-about .about-capability__foot{
  margin-top:28px;
  padding:18px 16px;
  border:1px solid var(--color-grid);
  border-left:4px solid var(--color-wine);
  background:linear-gradient(90deg,rgba(107,39,55,.24),transparent 70%);
  display:grid;
  gap:10px;
}
.page-about .about-capability__flow{
  font-family:var(--font-number);
  font-size:15px;
  letter-spacing:.06em;
  color:var(--color-accent);
}
.page-about .about-capability__award{
  font-size:14px;
  line-height:1.7;
  color:var(--color-text-secondary);
}
.page-about .about-users__grid{
  display:grid;
  gap:16px;
}
.page-about .user-stat{
  position:relative;
  padding:20px 18px;
  background:var(--color-card);
  border:1px solid var(--color-grid);
  border-top:3px solid var(--color-accent);
}
.page-about .user-stat:nth-child(2){
  border-top-color:var(--color-accent-orange);
}
.page-about .user-stat:nth-child(3){
  border-top-color:var(--color-indigo);
}
.page-about .user-stat:nth-child(4){
  border-top-color:var(--color-wine);
}
.page-about .user-stat__num{
  display:block;
  font-family:var(--font-number);
  font-size:34px;
  font-weight:700;
  color:var(--color-accent);
  line-height:1.1;
}
.page-about .user-stat:nth-child(2) .user-stat__num{
  color:var(--color-accent-orange);
}
.page-about .user-stat:nth-child(3) .user-stat__num{
  color:var(--color-text);
}
.page-about .user-stat:nth-child(4) .user-stat__num{
  color:var(--color-wine);
}
.page-about .user-stat__label{
  display:block;
  margin-top:6px;
  font-size:14px;
  font-weight:700;
  color:var(--color-text);
}
.page-about .user-stat__detail{
  margin-top:8px;
  font-size:13px;
  line-height:1.6;
  color:var(--color-text-secondary);
}
.page-about .user-stat__bar{
  margin-top:16px;
  height:9px;
  background:var(--color-grid);
  transform:skewX(-24deg);
  overflow:hidden;
}
.page-about .user-stat__bar span{
  display:block;
  height:100%;
  background:linear-gradient(90deg,var(--color-accent),var(--color-accent-orange));
}
.page-about .about-promise{
  padding:52px 20px 56px;
  background:linear-gradient(125deg,var(--color-wine) 0%,rgba(107,39,55,.4) 34%,var(--color-bg-secondary) 78%);
  clip-path:polygon(0 5%,100% 0,100% 100%,0 95%);
}
.page-about .about-promise__inner{
  max-width:1280px;
  margin:0 auto;
  display:grid;
  gap:26px;
}
.page-about .about-promise__main p{
  margin-top:14px;
  max-width:52ch;
  font-size:16px;
  line-height:1.7;
  color:var(--color-text-secondary);
}
.page-about .about-promise__main .section-label{
  background:rgba(10,26,47,.55);
}
.page-about .about-promise__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:12px;
}
.page-about .about-promise__list li{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--color-text);
  border-left:3px solid var(--color-accent);
  background:rgba(10,26,47,.4);
  padding:12px 14px;
  border-top:1px solid var(--color-grid);
  border-right:1px solid var(--color-grid);
  border-bottom:1px solid var(--color-grid);
}
.page-about .about-promise__list .num{
  color:var(--color-accent);
  font-weight:700;
}
.page-about .about-promise__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  grid-column:1 / -1;
}
@media (min-width:720px){
  .page-about .about-hero__inner{
    grid-template-columns:1.5fr .85fr;
    align-items:end;
    gap:36px;
  }
  .page-about .about-hero{
    padding-top:48px;
  }
  .page-about .about-metrics{
    grid-template-columns:repeat(4,1fr);
  }
  .page-about .about-metrics__item{
    border-bottom:0;
    border-right:1px solid var(--color-grid);
    padding:20px 18px;
  }
  .page-about .about-metrics__item:nth-child(2n){
    border-right:1px solid var(--color-grid);
  }
  .page-about .about-metrics__item:last-child{
    border-right:0;
  }
  .page-about .about-coverage__grid{
    grid-template-columns:1.4fr 1fr;
    gap:36px;
  }
  .page-about .about-coverage__figure{
    transform:rotate(var(--about-rot));
  }
  .page-about .about-update{
    grid-template-columns:.9fr 1.1fr;
    gap:28px;
    padding:28px;
  }
  .page-about .about-capability__grid{
    grid-template-columns:repeat(2,1fr);
    gap:20px;
  }
  .page-about .about-users__grid{
    grid-template-columns:repeat(2,1fr);
    gap:20px;
  }
  .page-about .about-promise__inner{
    grid-template-columns:1.2fr .8fr;
    gap:32px;
  }
}
@media (min-width:1024px){
  .page-about .about-timeline__decor{
    position:absolute;
    right:16px;
    top:40px;
    width:200px;
    max-width:none;
    opacity:.5;
  }
  .page-about .timeline{
    max-width:860px;
  }
  .page-about .timeline::before{
    left:50%;
    transform:translateX(-50%);
  }
  .page-about .timeline__item{
    width:50%;
    padding:0 44px 24px 0;
  }
  .page-about .timeline__item:nth-child(odd){
    text-align:right;
  }
  .page-about .timeline__item:nth-child(odd) .timeline__card{
    border-left:1px solid var(--color-grid);
    border-right:3px solid var(--color-accent);
  }
  .page-about .timeline__item:nth-child(even){
    margin-left:50%;
    padding:0 0 24px 44px;
  }
  .page-about .timeline__marker{
    left:auto;
    right:-7px;
  }
  .page-about .timeline__item:nth-child(even) .timeline__marker{
    left:-7px;
    right:auto;
  }
  .page-about .timeline__content p{
    text-align:left;
  }
  .page-about .about-capability__grid{
    grid-template-columns:repeat(4,1fr);
  }
  .page-about .about-users__grid{
    grid-template-columns:repeat(4,1fr);
  }
}
@media (hover:hover) and (min-width:720px){
  .page-about .hero-stats__tip{
    position:absolute;
    z-index:4;
    top:calc(100% + 8px);
    left:0;
    width:220px;
    opacity:0;
    visibility:hidden;
    transform:translateY(-4px);
    transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  }
  .page-about .hero-stats__row:hover .hero-stats__tip,
  .page-about .hero-stats dt:focus-within .hero-stats__tip{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
}