:root{
  --bg:#050e1b;
  --bg2:#0d1d34;
  --card:#101b2e;
  --card2:#162842;
  --text:#eef6ff;
  --muted:#aebdd1;
  --accent:#35a4ff;
  --accent2:#7bdcff;
  --line:#28415f;
  --success:#7ee787;
  --warn:#ffd166;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  background:
    radial-gradient(circle at top left,rgba(53,164,255,.20),transparent 30%),
    radial-gradient(circle at 85% 10%,rgba(123,220,255,.10),transparent 26%),
    linear-gradient(135deg,var(--bg),var(--bg2));
  color:var(--text);
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1200px;margin:auto;padding:0 22px}
.nav{
  position:sticky;top:0;z-index:1000;
  background:rgba(5,14,27,.9);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px)
}
.nav-inner{display:flex;justify-content:space-between;align-items:center;padding:15px 0}
.logo{font-weight:950;color:white;letter-spacing:.4px}
.nav-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.nav-links a{color:var(--text);font-size:14px;font-weight:800}
.hero{padding:78px 0 48px}
.hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:28px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid rgba(53,164,255,.75);
  color:var(--accent2);
  padding:8px 13px;border-radius:999px;
  font-size:13px;font-weight:900;margin-bottom:18px
}
.badge:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 14px var(--success)}
h1{font-size:55px;line-height:1.02;margin:0 0 18px;letter-spacing:-1.2px}
h2{font-size:32px;margin:0 0 18px;letter-spacing:-.4px}
h3{margin:0 0 8px}
p{color:var(--muted);line-height:1.65}
.card{
  background:linear-gradient(180deg,rgba(16,27,46,.97),rgba(22,40,66,.97));
  border:1px solid var(--line);
  border-radius:22px;
  padding:24px;
  box-shadow:0 22px 50px rgba(0,0,0,.28)
}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 16px;border-radius:13px;
  border:1px solid var(--accent);
  background:var(--accent);color:#06101f;
  font-weight:950
}
.btn.secondary{background:transparent;color:var(--text)}
.section{padding:38px 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.two{grid-template-columns:repeat(2,1fr)}
.four{grid-template-columns:repeat(4,1fr)}
.sidebar-list{list-style:none;margin:0;padding:0}
.sidebar-list li{padding:11px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.sidebar-list li:last-child{border-bottom:0}
.kpi{font-size:28px;color:white;font-weight:950}
.tag{
  display:inline-block;background:#1d3859;color:#c7e7ff;
  border:1px solid #345b84;border-radius:999px;
  padding:5px 9px;margin:4px 4px 0 0;
  font-size:12px;font-weight:850
}
.project-card{min-height:290px;position:relative;overflow:hidden}
.project-card:after{
  content:"";position:absolute;right:-42px;top:-42px;width:120px;height:120px;
  border-radius:50%;background:rgba(53,164,255,.12)
}
.placeholder{
  min-height:160px;border:1px dashed #4c78a8;border-radius:18px;
  display:flex;align-items:center;justify-content:center;text-align:center;
  color:#b9dfff;background:rgba(53,164,255,.07);font-weight:850;padding:14px
}
.rack{
  background:#081321;border:1px solid var(--line);border-radius:24px;padding:22px;
  max-width:620px;margin:auto
}
.rack-unit{
  border:1px solid #315b86;background:#14253d;border-radius:12px;
  padding:12px 14px;margin:9px 0;display:flex;justify-content:space-between;gap:12px;
  align-items:center
}
.rack-unit strong{color:#fff}
.rack-unit span{color:var(--muted);font-size:13px}
.rack-top{background:#10223b;border-color:#44729f}
.diagram{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  background:#07111f;border:1px solid var(--line);border-radius:22px;padding:24px
}
.node{
  background:#14253d;border:1px solid #345b84;border-radius:16px;
  padding:16px;text-align:center;color:#dceeff;font-weight:900
}
.node.router{grid-column:span 4;background:#18335a}
.node.switch{grid-column:span 4;background:#153250}
.node.server{min-height:90px}
.specs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
.spec{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;padding:12px}
.spec small{display:block;color:var(--accent2);font-weight:900;margin-bottom:4px}
.timeline{border-left:3px solid var(--accent);padding-left:22px}
.item{margin-bottom:24px}
.item small{color:var(--accent2);font-weight:950}
.process{counter-reset:step}
.process .card{position:relative;padding-left:58px}
.process .card:before{
  counter-increment:step;content:counter(step);
  position:absolute;left:18px;top:20px;width:28px;height:28px;border-radius:50%;
  background:var(--accent);color:#06101f;font-weight:950;
  display:flex;align-items:center;justify-content:center
}
.notice{
  border-left:4px solid var(--accent);background:rgba(53,164,255,.08);
  border-radius:12px;padding:14px 16px;color:var(--muted)
}
.footer{border-top:1px solid var(--line);padding:28px 0;margin-top:38px;text-align:center;color:var(--muted)}
@media(max-width:920px){
  h1{font-size:39px}
  .hero-grid,.grid,.two,.four,.diagram,.specs{grid-template-columns:1fr}
  .node.router,.node.switch{grid-column:span 1}
  .nav-inner{align-items:flex-start;flex-direction:column;gap:12px}
}