*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,p,dl,dd,ul,ol,figure,blockquote{margin:0;padding:0}
ul[class],ol[class]{list-style:none}
img,picture,video{display:block;max-width:100%}
input,button,textarea,select{font:inherit}

:root{
  --bg:#0C0C14;
  --surface-1:#181824;
  --surface-2:#222230;
  --cyan:#00E5FF;
  --green:#A3FF12;
  --gold:#FFD166;
  --red:#FF4D6A;
  --success:#26D0A0;
  --text-main:#F2F6FA;
  --text-muted:#9BA3B4;
  --line:#323247;
  --font-heading:"Noto Sans SC","Bebas Neue","Arial Narrow",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono","SFMono-Regular",monospace;
}

html,body{overflow-x:hidden}
body{
  background:var(--bg);
  color:var(--text-main);
  font-family:var(--font-body);
  font-size:14px;
  line-height:1.7;
  padding-top:88px;
  -webkit-font-smoothing:antialiased;
}
main{display:block}
#main-content{outline:none}
a{color:var(--cyan);text-decoration:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.container{
  width:100%;
  max-width:1340px;
  margin-inline:auto;
  padding-inline:24px;
}

.skip-link{
  position:fixed;
  top:12px;left:16px;
  z-index:3000;
  background:var(--cyan);
  color:#0C0C14;
  padding:8px 16px;
  border-radius:8px;
  font:700 14px/1 var(--font-body);
  transform:translateY(-200%);
  transition:transform .2s;
}
.skip-link:focus-visible{transform:translateY(0)}

.header-wrap{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1500;
  padding-inline:20px;
}
.site-header{
  position:relative;
  margin-top:10px;
  min-height:60px;
  background:rgba(24,24,36,.9);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:0 16px 40px rgba(0,0,0,.45);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:60px;
}

.progress-bar{
  position:absolute;
  top:-1px;left:0;
  height:2px;
  width:0%;
  background:linear-gradient(90deg,var(--cyan),var(--green));
  border-radius:18px 0 0 0;
  box-shadow:0 0 12px rgba(0,229,255,.55);
  pointer-events:none;
  z-index:2;
}

.brand-link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  color:var(--text-main);
  text-decoration:none;
}
.brand-mark{
  display:inline-grid;
  place-items:center;
  width:36px;height:36px;
  border-radius:9px;
  background:var(--cyan);
  color:#0C0C14;
  font:900 16px var(--font-heading);
  letter-spacing:-.02em;
  box-shadow:0 0 18px rgba(0,229,255,.25);
}
.brand-copy{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font:800 16px var(--font-heading);letter-spacing:.04em}
.brand-sub{
  font:500 10px var(--font-mono);
  color:var(--text-muted);
  letter-spacing:.14em;
  text-transform:uppercase;
  margin-top:2px;
}
.brand-badge{
  margin-left:4px;
  padding:3px 8px;
  border:1px solid rgba(255,209,102,.5);
  border-radius:999px;
  color:var(--gold);
  background:rgba(255,209,102,.08);
  font:700 10px var(--font-mono);
  letter-spacing:.08em;
}

.site-nav{
  position:relative;
  display:flex;
  align-items:center;
}
.nav-list{display:flex;align-items:center;gap:4px}
.nav-link{
  display:inline-block;
  padding:8px 14px;
  border-radius:999px;
  font:600 14px var(--font-body);
  color:var(--text-muted);
  text-decoration:none;
  transition:color .2s,background-color .2s;
}
.nav-link:hover{color:var(--text-main);background:rgba(255,255,255,.05)}
.nav-link[aria-current="page"]{
  color:#0C0C14;
  background:var(--cyan);
  box-shadow:0 0 16px rgba(0,229,255,.35);
}

.header-tools{
  display:flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}
.live-indicator{
  width:8px;height:8px;
  border-radius:50%;
  background:var(--green);
  animation:live-pulse 1.8s infinite;
}
@keyframes live-pulse{
  0%{box-shadow:0 0 0 0 rgba(163,255,18,.55)}
  70%{box-shadow:0 0 0 9px rgba(163,255,18,0)}
  100%{box-shadow:0 0 0 0 rgba(163,255,18,0)}
}
.clock-zone{
  font:700 11px var(--font-mono);
  color:var(--text-muted);
  letter-spacing:.1em;
  border:1px solid var(--line);
  border-radius:5px;
  padding:2px 5px;
}
.header-clock{
  font:600 13px var(--font-mono);
  color:var(--text-main);
  min-width:58px;
  text-align:right;
  letter-spacing:.06em;
}

.nav-toggle{
  display:none;
  position:relative;
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:10px;
  background:var(--surface-2);
  cursor:pointer;
  padding:0;
  place-items:center;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle-box{display:grid;gap:4px}
.nav-toggle-line{
  display:block;
  width:18px;height:2px;
  background:var(--text-main);
  border-radius:2px;
  transition:transform .25s,opacity .25s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.back-top{
  position:fixed;
  right:22px;bottom:22px;
  z-index:900;
  width:48px;height:48px;
  border-radius:50%;
  border:1px solid rgba(0,229,255,.4);
  background:rgba(24,24,36,.92);
  color:var(--cyan);
  font:700 11px var(--font-mono);
  letter-spacing:.04em;
  display:grid;
  place-items:center;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(14px);
  transition:opacity .3s,visibility .3s,transform .3s,border-color .2s;
}
.back-top:hover{
  border-color:var(--cyan);
  box-shadow:0 0 18px rgba(0,229,255,.25);
}
.back-top.is-visible{opacity:1;visibility:visible;transform:none}

.site-footer{
  margin-top:64px;
  background:#0E0E16;
  border-top:1px solid var(--line);
  color:var(--text-main);
}
.site-footer a{
  color:var(--text-muted);
  text-decoration:none;
  transition:color .2s;
}
.site-footer a:hover{color:var(--cyan)}
.footer-main{
  display:grid;
  grid-template-columns:2.2fr 1fr 1fr 1.5fr;
  gap:48px;
  padding:48px 0 40px;
}
.footer-brand-head{display:flex;align-items:center;gap:10px}
.footer-mark{
  width:34px;height:34px;
  border-radius:8px;
  background:var(--cyan);
  color:#0C0C14;
  display:grid;
  place-items:center;
  font:900 15px var(--font-heading);
}
.footer-brand-name{font:800 18px var(--font-heading)}
.footer-english{
  font:500 11px var(--font-mono);
  color:var(--text-muted);
  letter-spacing:.16em;
  text-transform:uppercase;
  margin-top:10px;
}
.footer-tagline{
  font:14px var(--font-body);
  color:var(--text-muted);
  margin-top:10px;
}
.footer-trust{
  font:12px var(--font-body);
  color:#6B7280;
  line-height:1.7;
  margin-top:18px;
  border-left:3px solid var(--line);
  padding-left:12px;
}
.footer-heading{
  font:700 13px var(--font-mono);
  color:var(--cyan);
  letter-spacing:.12em;
  text-transform:uppercase;
  margin-bottom:16px;
}
.footer-list li+li{margin-top:10px}
.footer-list a::before{
  content:"›";
  color:var(--gold);
  margin-right:6px;
}
.footer-contact dt{
  font:500 10px var(--font-mono);
  color:var(--text-muted);
  text-transform:uppercase;
  letter-spacing:.1em;
  margin-bottom:4px;
}
.footer-contact dd{
  font:14px var(--font-body);
  color:var(--text-main);
  padding-left:12px;
  margin:0 0 14px;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  padding:22px 0;
  border-top:1px solid var(--line);
  font:12px var(--font-mono);
  color:var(--text-muted);
}

.section{padding-block:56px}
.section-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  border-bottom:1px solid var(--line);
  padding-bottom:14px;
  margin-bottom:24px;
}
.section-index{
  font:700 13px var(--font-mono);
  color:var(--cyan);
  letter-spacing:.08em;
}
.section-title{
  font:800 26px/1.2 var(--font-heading);
  color:var(--text-main);
}
.section-desc{
  margin-left:auto;
  max-width:420px;
  font:13px/1.6 var(--font-body);
  color:var(--text-muted);
  text-align:right;
}

.grid{display:grid;gap:20px}
.grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{
  background:var(--surface-1);
  border:1px solid var(--line);
  border-radius:14px;
  padding:20px;
  transition:border-color .25s,transform .25s;
}
.card:hover{
  border-color:rgba(0,229,255,.45);
  transform:translateY(-3px);
}
.card-title{
  font:800 17px/1.4 var(--font-heading);
  color:var(--text-main);
  margin-bottom:8px;
}
.card-meta{
  font:12px var(--font-mono);
  color:var(--text-muted);
  margin-bottom:10px;
}
.card-body{
  font:14px/1.7 var(--font-body);
  color:var(--text-main);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface-2);
  color:var(--text-muted);
  font:500 12px var(--font-body);
}
.tag--cyan{border-color:rgba(0,229,255,.5);color:var(--cyan);background:rgba(0,229,255,.06)}
.tag--green{border-color:rgba(163,255,18,.5);color:var(--green);background:rgba(163,255,18,.06)}
.tag--gold{border-color:rgba(255,209,102,.5);color:var(--gold);background:rgba(255,209,102,.06)}
.tag--red{border-color:rgba(255,77,106,.5);color:var(--red);background:rgba(255,77,106,.06)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid var(--line);
  border-radius:10px;
  background:var(--surface-2);
  color:var(--text-main);
  font:600 14px var(--font-body);
  text-decoration:none;
  cursor:pointer;
  transition:border-color .2s,background-color .2s,color .2s;
}
.btn:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--primary{
  background:var(--cyan);
  border-color:var(--cyan);
  color:#0C0C14;
  font-weight:800;
  box-shadow:0 0 20px rgba(0,229,255,.2);
}
.btn--primary:hover{background:transparent;color:var(--cyan)}
.btn--ghost{background:transparent}
.btn--ghost:hover{border-color:var(--green);color:var(--green)}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:20px;
  padding:10px 14px;
  background:var(--surface-1);
  border:1px solid var(--line);
  border-radius:8px;
  font:12px var(--font-mono);
  color:var(--text-muted);
}
.breadcrumbs a{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--text-main)}

.split-line{
  height:2px;
  border:0;
  background:linear-gradient(90deg,var(--cyan),var(--green) 55%,var(--line) 130%);
  transform:skewX(-18deg);
  margin:28px 0;
}
.split-line--gold{background:linear-gradient(90deg,var(--gold),transparent)}

.image-zone{
  position:relative;
  border:1px solid var(--line);
  border-radius:12px;
  background:linear-gradient(135deg,#181824,#10101a 40%,#222230);
  min-height:180px;
  overflow:hidden;
  display:flex;
  align-items:flex-end;
  padding:14px;
}
.image-zone::before{
  content:attr(data-label);
  position:relative;
  z-index:1;
  font:500 11px var(--font-mono);
  color:var(--text-muted);
  text-transform:uppercase;
  letter-spacing:.1em;
}
.image-zone::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(0,229,255,.08),transparent 40%);
  pointer-events:none;
}
.image-zone--wide{aspect-ratio:16/7}
.image-zone--tall{aspect-ratio:4/5}
.image-zone--square{aspect-ratio:1/1}

@media (max-width:1024px){
  .footer-main{grid-template-columns:1fr 1fr;gap:32px}
  .grid-cols-4{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:900px){
  body{padding-top:78px}
  .header-wrap{padding-inline:14px}
  .site-header{margin-top:6px}
  .header-inner{min-height:54px}
  .brand-mark{width:32px;height:32px;font-size:14px}
  .brand-name{font-size:15px}
  .brand-sub{display:none}
  .brand-badge{display:none}
  .header-tools{gap:6px}
  .clock-zone{display:none}
  .header-clock{font-size:12px;min-width:52px}
  .nav-toggle{display:inline-grid}
  .site-nav{
    position:absolute;
    top:calc(100% + 8px);
    left:0;right:0;
    display:none;
    padding:10px;
    background:rgba(24,24,36,.98);
    border:1px solid var(--line);
    border-radius:16px;
    box-shadow:0 24px 48px rgba(0,0,0,.5);
    z-index:50;
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch}
  .nav-link{border-radius:10px}
}

@media (max-width:680px){
  .container{padding-inline:16px}
  .footer-main{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .grid-cols-2,.grid-cols-3,.grid-cols-4{grid-template-columns:1fr}
  .back-top{right:14px;bottom:14px;width:44px;height:44px}
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
}