:root{
  --bg-deep:#0B1E3A;
  --bg-card:#132A4A;
  --bg-panel:#0E2440;
  --ink-main:#F5F7FA;
  --ink-dim:#9FB4C8;
  --ink-ghost:#3A5A80;
  --line:#3A5A80;
  --accent:#FF6A00;
  --accent-deep:#D95300;
  --accent-cyan:#00D4FF;
  --accent-yellow:#FFC700;
  --radius:0;
  --shell-width:1440px;
  --nav-width:280px;
  --font-head:Impact,'Arial Black','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --header-h:88px;
  --ease-fast:120ms ease-out;
  --shadow-1:0 12px 32px rgba(0,0,0,.22);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--bg-deep);
  color:var(--ink-main);
  line-height:1.65;
  min-height:100vh;
  font-size:16px;
  background-image:
    linear-gradient(120deg, rgba(0,212,255,.05) 0%, transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(255,106,0,.06), transparent 28%);
}
a{color:var(--accent-cyan);text-decoration:none}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:3px;border-radius:2px}
::selection{background:var(--accent);color:#fff}

#mobile-nav{display:none}
body.has-drawer-open{overflow:hidden}

.skip-link{
  position:absolute;
  left:-9999px;
  top:12px;
  z-index:2000;
  background:var(--accent);
  color:#fff;
  font-weight:600;
  padding:10px 18px;
  border-radius:0;
  font-size:14px;
}
.skip-link:focus{left:12px}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--bg-deep);
  border-bottom:1px solid rgba(58,90,128,.5);
  backdrop-filter:blur(4px);
}
.header-shell{
  max-width:var(--shell-width);
  margin:0 auto;
  padding:0 clamp(16px, 3vw, 48px);
  height:var(--header-h);
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
  position:relative;
}
.header-shell::before{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  height:3px;
  width:100%;
  background:linear-gradient(90deg,var(--accent) 0%, var(--accent) 12%, transparent 12.1%, transparent 100%);
  opacity:.85;
}
.header-brand-wrap{
  display:flex;
  align-items:center;
  gap:14px;
  min-width:0;
}
.brand-logo{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  position:relative;
}
.brand-svg{
  position:relative;
  width:42px;
  height:42px;
  display:block;
  flex:0 0 42px;
  background:var(--bg-deep);
  border:1px solid var(--line);
  clip-path:polygon(0 0, 82% 0, 100% 18%, 100% 100%, 18% 100%, 0 82%);
}
.brand-core{
  position:absolute;
  top:8px;
  left:8px;
  width:24px;
  height:24px;
  border-radius:50%;
  background:radial-gradient(circle at 30% 30%, var(--accent-cyan), var(--accent) 70%);
  opacity:.9;
}
.brand-strike{
  position:absolute;
  display:block;
  height:2px;
  background:linear-gradient(90deg, var(--accent), var(--accent-cyan));
  transform-origin:left center;
}
.brand-strike--a{
  width:32px;
  top:8px;
  left:4px;
  transform:rotate(-18deg);
}
.brand-strike--b{
  width:22px;
  top:22px;
  left:2px;
  transform:rotate(24deg);
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.1;
}
.brand-name{
  font-family:var(--font-head);
  font-size:26px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--ink-main);
  text-transform:uppercase;
  white-space:nowrap;
}
.brand-caption{
  font-size:10px;
  letter-spacing:.3em;
  color:var(--ink-ghost);
  text-transform:uppercase;
  margin-top:3px;
}

.data-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--bg-card);
  border:1px solid var(--line);
  color:var(--accent-cyan);
  font-size:11px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  padding:3px 9px;
  white-space:nowrap;
}
.data-chip::before{
  content:"";
  width:5px;
  height:5px;
  background:var(--accent);
  display:inline-block;
  transform:rotate(45deg);
  flex:0 0 5px;
}
.header-chip{
  display:inline-flex;
  margin-left:6px;
}

.site-nav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  position:relative;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-link{
  display:block;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  color:var(--ink-main);
  padding:9px 14px;
  position:relative;
  white-space:nowrap;
  transition:color var(--ease-fast), background var(--ease-fast), transform var(--ease-fast);
  border:1px solid transparent;
}
.nav-link::before{
  content:"";
  position:absolute;
  left:-1px;
  top:50%;
  width:3px;
  height:0;
  background:var(--accent);
  transform:translateY(-50%);
  transition:height var(--ease-fast);
}
.nav-link:hover{
  color:var(--accent);
  background:rgba(255,106,0,.08);
  border-color:rgba(255,106,0,.25);
  transform:translateX(2px);
}
.nav-link:hover::before{height:16px}
.nav-link[aria-current="page"]{
  color:var(--accent);
  background:rgba(255,106,0,.08);
  border-color:rgba(255,106,0,.2);
}
.nav-link[aria-current="page"]::before{height:16px;background:var(--accent-cyan)}
.nav-gloss{
  writing-mode:vertical-rl;
  font-size:10px;
  letter-spacing:.4em;
  color:var(--ink-ghost);
  text-transform:uppercase;
  margin-left:10px;
  user-select:none;
}

.header-tools{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:14px;
}
.lang-switch{
  display:flex;
  align-items:center;
  gap:6px;
  border:1px solid var(--line);
  padding:5px 8px;
  background:var(--bg-card);
}
.lang-link{
  font-size:13px;
  font-weight:700;
  color:var(--ink-dim);
  padding:2px 7px;
  line-height:1;
  transition:color var(--ease-fast), background var(--ease-fast);
}
.lang-link:hover{color:var(--accent-cyan)}
.lang-link.is-current{
  background:var(--accent);
  color:#fff;
}
.lang-divider{
  width:1px;
  height:14px;
  background:var(--line);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  letter-spacing:.04em;
  font-size:14px;
  border:1px solid var(--line);
  padding:11px 20px;
  color:var(--ink-main);
  background:transparent;
  text-transform:uppercase;
  clip-path:polygon(0 0, calc(100% - 10px) 0, 100% 50%, calc(100% - 10px) 100%, 0 100%, 7px 50%);
  transition:background var(--ease-fast), color var(--ease-fast), border-color var(--ease-fast), transform var(--ease-fast), clip-path var(--ease-fast);
  text-align:center;
}
.btn:hover{
  transform:translateX(3px);
  border-color:var(--accent);
  background:rgba(255,106,0,.15);
}
.btn:active{transform:scale(.97)}
.btn--primary{
  background:var(--accent);
  color:#fff;
  border-color:var(--accent);
}
.btn--primary:hover{
  background:var(--accent-deep);
  border-color:var(--accent-deep);
  color:#fff;
}
.btn--compact{padding:8px 16px;font-size:13px}

.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  background:var(--bg-card);
  border:1px solid var(--line);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  position:relative;
  transition:border-color var(--ease-fast);
}
.nav-toggle:hover{border-color:var(--accent)}
.speed-line{
  display:block;
  width:18px;
  height:2px;
  background:var(--accent);
  transition:width var(--ease-fast), transform var(--ease-fast), background var(--ease-fast);
}
.speed-line:nth-child(2){
  width:13px;
  background:var(--accent-cyan);
}
.speed-line:nth-child(3){
  width:18px;
}
.nav-toggle[aria-expanded="true"] .speed-line{
  width:20px;
  background:var(--accent);
}
.nav-toggle[aria-expanded="true"] .speed-line:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .speed-line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .speed-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.article-shell{
  max-width:var(--shell-width);
  margin:0 auto;
  padding:clamp(28px, 5vw, 72px) clamp(16px, 3vw, 48px);
}

.section-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.3em;
  color:var(--accent-cyan);
  text-transform:uppercase;
  font-weight:700;
  margin-bottom:16px;
}
.section-kicker::before{
  content:"";
  width:28px;
  height:4px;
  background:linear-gradient(90deg, var(--accent), var(--accent-cyan));
  clip-path:polygon(0 0, 100% 0, 80% 100%, 0% 100%);
}

.site-footer{
  position:relative;
  background:color-mix(in srgb, var(--bg-deep) 92%, #000);
  border-top:2px solid var(--line);
  margin-top:0;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-3px;
  left:0;
  width:100%;
  height:3px;
  background:linear-gradient(90deg, var(--accent) 0%, var(--accent) 18%, var(--accent-cyan) 18.1%, var(--accent-cyan) 36%, transparent 36.1%, transparent 100%);
  opacity:.7;
}
.footer-shell{
  max-width:var(--shell-width);
  margin:0 auto;
  padding:0 clamp(16px, 3vw, 48px);
}
.trust-statement{
  padding:22px 0;
  display:grid;
  grid-template-columns:1fr 4fr;
  align-items:center;
  gap:24px;
  border-bottom:1px solid rgba(58,90,128,.6);
}
.speed-rule{
  display:block;
  height:5px;
  background:linear-gradient(90deg, var(--accent), var(--accent-cyan) 50%, transparent 100%);
  clip-path:polygon(0 0, 100% 0, 92% 100%, 0% 100%);
}
.trust-text{
  font-size:14px;
  color:var(--ink-dim);
  line-height:1.6;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.6fr;
  gap:clamp(28px, 4vw, 64px);
  padding:48px 0 36px;
}
.footer-brand-name{
  font-family:var(--font-head);
  font-size:34px;
  letter-spacing:.02em;
  color:var(--ink-main);
  margin-bottom:14px;
}
.footer-manifesto{
  font-size:14px;
  color:var(--ink-dim);
  line-height:1.7;
  max-width:28em;
  margin-bottom:22px;
}
.footer-seal{
  display:inline-block;
  padding:6px 14px;
  border:1px solid var(--line);
  font-size:12px;
  color:var(--accent-cyan);
  letter-spacing:.12em;
  background:var(--bg-card);
  position:relative;
}
.footer-seal::after{
  content:"";
  position:absolute;
  right:-4px;
  top:-4px;
  width:8px;
  height:8px;
  background:var(--accent);
}
.footer-title{
  font-size:13px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ink-main);
  margin-bottom:18px;
  display:flex;
  align-items:center;
  gap:8px;
}
.footer-title::before{
  content:"";
  width:8px;
  height:8px;
  background:var(--accent);
  transform:rotate(45deg);
  flex:0 0 8px;
}
.footer-nav-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-link{
  font-size:14px;
  color:var(--ink-dim);
  padding:4px 0;
  position:relative;
  transition:color var(--ease-fast), transform var(--ease-fast), padding-left var(--ease-fast);
  display:inline-flex;
}
.footer-link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:0;
  height:2px;
  background:var(--accent-cyan);
  transition:width var(--ease-fast);
}
.footer-link:hover{
  color:var(--accent-cyan);
  transform:translateX(4px);
  padding-left:8px;
}
.footer-link:hover::before{
  width:10px;
}
.footer-link--plain{
  color:var(--ink-dim);
}
.footer-link--plain:hover{
  color:var(--accent);
}
.footer-contact-list{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-contact-list li{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.contact-label{
  font-size:11px;
  letter-spacing:.22em;
  color:var(--ink-ghost);
  text-transform:uppercase;
  margin-bottom:2px;
}
.contact-value{
  font-size:14px;
  color:var(--ink-dim);
  line-height:1.5;
}
.footer-bottom{
  border-top:1px solid rgba(58,90,128,.6);
  padding:18px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
.copyright{
  font-size:13px;
  color:var(--ink-ghost);
}
.footer-link--icp{
  font-size:12px;
  color:var(--ink-ghost);
  letter-spacing:.08em;
}
.footer-link--icp:hover{
  color:var(--accent-cyan);
  transform:none;
  padding-left:0;
}

@media (max-width:1100px){
  .nav-link{font-size:13px;padding:8px 10px}
  .header-chip{display:none}
  .nav-gloss{display:none}
}

@media (max-width:900px){
  :root{--header-h:72px}
  .header-shell{
    grid-template-columns:1fr auto;
    gap:14px;
  }
  .lang-switch{display:none}
  .header-tools .btn{display:none}
  .nav-toggle{
    display:flex;
  }
  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    bottom:0;
    z-index:150;
    background:var(--bg-deep);
    display:block;
    padding:clamp(24px, 6vw, 48px);
    overflow-y:auto;
    transform:translateX(-110%);
    transition:transform 220ms ease-out;
    border-top:1px solid var(--line);
  }
  .site-nav[data-open]{
    transform:translateX(0);
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    max-width:560px;
  }
  .nav-item{border-bottom:1px solid rgba(58,90,128,.4)}
  .nav-link{
    font-size:26px;
    font-family:var(--font-head);
    padding:20px 8px;
    color:var(--ink-main);
    display:flex;
    align-items:center;
  }
  .nav-link::before{
    left:0;
    top:auto;
    bottom:0;
    width:0;
    height:3px;
    transform:none;
    transition:width var(--ease-fast);
  }
  .nav-link:hover::before{width:100px;height:3px}
  .nav-link[aria-current="page"]::before{width:100px;height:3px;left:0}
  .nav-gloss{
    writing-mode:horizontal-tb;
    margin-top:24px;
    letter-spacing:.3em;
    color:var(--ink-ghost);
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:36px;
  }
  .trust-statement{grid-template-columns:1fr}
}

@media (max-width:560px){
  .brand-name{font-size:22px}
  .brand-caption{letter-spacing:.18em}
  .brand-svg{width:36px;height:36px;flex-basis:36px}
  .brand-core{width:20px;height:20px;top:6px;left:6px}
  .brand-strike--a{width:26px;top:6px;left:3px}
  .brand-strike--b{width:18px;top:18px;left:1px}
  .footer-grid{
    grid-template-columns:1fr;
    gap:24px;
    padding-top:32px;
  }
  .footer-bottom{
    flex-direction:column;
    align-items:flex-start;
  }
  .trust-statement{
    padding:18px 0;
  }
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    transition-duration:0.01ms !important;
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
  }
  html{scroll-behavior:auto}
  .site-nav{transition:none}
}
@media (prefers-reduced-motion: no-preference){
  body[data-scroll-progress]::after{
    content:"";
    position:fixed;
    top:0;
    left:0;
    height:3px;
    width:var(--scroll-progress, 0%);
    background:linear-gradient(90deg, var(--accent), var(--accent-cyan));
    z-index:3000;
    pointer-events:none;
  }
}

:target{
  scroll-margin-top:calc(var(--header-h) + 20px);
}