:root{
  --bg:#05060f; --bg-alt:#0a0c1e; --panel:#0e1128; --panel-border:rgba(139,124,255,0.16);
  --purple:#8b5cf6; --blue:#3b82f6; --cyan:#22d3ee;
  --text:#e7e9f7; --muted:#8d92b8; --muted-2:#5f6488;
  --grad: linear-gradient(90deg,var(--purple),var(--blue) 55%,var(--cyan));
  --header-h:64px;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg); color:var(--text); font-family:'Inter',system-ui,sans-serif; min-height:100vh;}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto;} }
h1,h2,.font-display{font-family:'Orbitron',sans-serif;}
.mono{font-family:'JetBrains Mono',monospace;}
a{color:inherit; text-decoration:none;}
.container{max-width:920px; margin:0 auto; padding:0 20px;}
:focus-visible{outline:2px solid var(--cyan); outline-offset:2px; border-radius:4px;}

.bg-glow{position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(60% 40% at 85% 0%, rgba(139,92,246,0.14), transparent 60%),
    radial-gradient(50% 35% at 5% 20%, rgba(34,211,238,0.08), transparent 60%);
}

header{
  position:sticky; top:0; z-index:100; height:var(--header-h);
  display:flex; align-items:center;
  background:rgba(5,6,15,0.75); backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--panel-border);
}
.header-inner{width:100%; display:flex; align-items:center; justify-content:space-between; gap:12px;}
.brand{display:flex; align-items:center; gap:10px;}
.brand-mark{width:32px; height:32px; filter:drop-shadow(0 0 8px rgba(139,92,246,0.55));}
.brand-text{display:flex; flex-direction:column; line-height:1;}
.brand-text .name{font-size:15px; font-weight:800; letter-spacing:0.5px; color:#fff;}
.brand-text .sub{font-size:9px; font-weight:700; letter-spacing:3px; background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent; margin-top:2px;}
.back-link{display:inline-flex; align-items:center; gap:6px; font-size:13.5px; font-weight:600; color:var(--muted); padding:9px 16px; border-radius:10px; border:1px solid var(--panel-border); background:rgba(255,255,255,0.02); transition:all .2s;}
.back-link:hover{color:#fff; border-color:rgba(139,124,255,0.5);}
.back-link svg{width:15px; height:15px;}

main{position:relative; z-index:1;}
.hero-block{padding:48px 0 30px; border-bottom:1px solid var(--panel-border);}
.eyebrow{display:inline-flex; align-items:center; gap:8px; font-size:11px; font-weight:700; letter-spacing:3px; color:var(--cyan); text-transform:uppercase; margin-bottom:14px;}
.eyebrow::before{content:''; width:20px; height:2px; background:var(--grad); border-radius:2px;}
h1.title{font-size:clamp(28px,6vw,42px); font-weight:900; letter-spacing:0.4px; color:#fff; margin-bottom:14px;}
.meta-row{display:flex; flex-wrap:wrap; gap:10px 22px; margin-top:18px;}
.meta-item{font-size:12.5px; color:var(--muted-2);}
.meta-item strong{color:var(--muted); font-weight:700;}
.meta-item .mono{color:var(--cyan);}
.intro{color:var(--muted); font-size:15px; line-height:1.75; max-width:680px; margin-top:20px;}

.layout{display:grid; grid-template-columns:1fr; gap:32px; padding:36px 0 90px;}
.toc{
  order:2; align-self:start; padding:20px 18px; border-radius:16px;
  background:rgba(255,255,255,0.025); border:1px solid var(--panel-border);
}
.toc h4{font-size:11px; font-weight:800; letter-spacing:2px; text-transform:uppercase; color:var(--muted-2); margin-bottom:14px;}
.toc ol{list-style:none; counter-reset:toc; display:flex; flex-direction:column; gap:2px;}
.toc li{counter-increment:toc;}
.toc a{display:flex; gap:10px; font-size:13px; color:var(--muted); padding:7px 8px; border-radius:8px; transition:all .15s;}
.toc a::before{content:counter(toc); font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--purple); flex-shrink:0; width:16px;}
.toc a:hover, .toc a.active{color:#fff; background:rgba(139,92,246,0.08);}

.content{order:1;}
.policy-section{padding:28px 0; border-bottom:1px solid var(--panel-border); scroll-margin-top:80px;}
.policy-section:last-child{border-bottom:none;}
.policy-section h2{font-size:20px; font-weight:800; color:#fff; margin-bottom:14px; display:flex; align-items:baseline; gap:10px;}
.policy-section h2 .num{font-family:'JetBrains Mono',monospace; font-size:13px; color:var(--cyan); font-weight:600;}
.policy-section p{font-size:14.5px; color:var(--muted); line-height:1.8; margin-bottom:14px;}
.policy-section p:last-child{margin-bottom:0;}
.policy-section ul{margin:0 0 14px 0; padding-left:0; list-style:none; display:flex; flex-direction:column; gap:8px;}
.policy-section ul li{font-size:14px; color:var(--muted); line-height:1.65; padding-left:20px; position:relative;}
.policy-section ul li::before{content:''; position:absolute; left:0; top:9px; width:6px; height:6px; border-radius:2px; background:var(--grad);}
.policy-section a.inline-mail{color:var(--cyan); font-weight:600; font-family:'JetBrains Mono',monospace; font-size:13.5px;}
.product-chip-row{display:flex; flex-wrap:wrap; gap:8px; margin:14px 0;}
.product-chip{font-size:12px; font-weight:700; padding:6px 12px; border-radius:999px; background:rgba(255,255,255,0.03); border:1px solid var(--panel-border); color:var(--muted);}
.product-chip.zx{border-color:rgba(139,92,246,0.4); color:#c4b5fd;}
.product-chip.lp{border-color:rgba(34,211,238,0.4); color:#67e8f9;}
.product-chip.st{border-color:rgba(192,132,252,0.4); color:#e9d5ff;}

.contact-cards{display:grid; grid-template-columns:1fr; gap:12px; margin-top:16px;}
.contact-card{display:flex; align-items:center; justify-content:space-between; gap:14px; padding:16px 18px; border-radius:14px; background:rgba(255,255,255,0.025); border:1px solid var(--panel-border); transition:border-color .2s, background .2s;}
.contact-card:hover{border-color:rgba(139,124,255,0.45); background:rgba(139,92,246,0.05);}
.contact-card .cl{display:flex; align-items:center; gap:12px;}
.contact-card .cc-icon{width:38px; height:38px; border-radius:10px; background:rgba(139,92,246,0.1); border:1px solid rgba(139,124,255,0.3); display:flex; align-items:center; justify-content:center; flex-shrink:0;}
.contact-card .cc-icon svg{width:17px; height:17px; color:var(--purple);}
.contact-card h4{font-size:14px; font-weight:700;}
.contact-card .mono{font-size:12.5px; color:var(--cyan);}
.contact-card svg.arrow{width:16px; height:16px; color:var(--muted-2); flex-shrink:0;}

.notice-box{margin-top:34px; padding:20px 22px; border-radius:16px; background:rgba(34,211,238,0.05); border:1px solid rgba(34,211,238,0.25);}
.notice-box p{font-size:13.5px; color:var(--muted); line-height:1.75; margin:0;}
.notice-box strong{color:var(--cyan);}

.back-to-top{position:fixed; right:18px; bottom:22px; z-index:80; width:44px; height:44px; border-radius:13px; background:var(--panel); border:1px solid var(--panel-border); display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none; transition:all .25s ease; box-shadow:0 12px 30px -10px rgba(0,0,0,0.6);}
.back-to-top.show{opacity:1; pointer-events:auto;}
.back-to-top svg{width:18px; height:18px; color:var(--cyan);}

footer{position:relative; z-index:1; border-top:1px solid var(--panel-border); padding:36px 0; text-align:center;}
footer p{font-size:12.5px; color:var(--muted-2);}
footer .footer-links{display:flex; flex-wrap:wrap; gap:16px; justify-content:center; margin-bottom:14px;}
footer .footer-links a{font-size:13px; color:var(--muted); transition:color .2s;}
footer .footer-links a:hover{color:var(--cyan);}

@media(min-width:860px){
  .layout{grid-template-columns:220px 1fr;}
  .toc{order:1; position:sticky; top:88px;}
  .content{order:2;}
  .contact-cards{grid-template-columns:repeat(2,1fr);}
}