:root {
  --bg: #0b1020;
  --panel: #131a33;
  --text: #e8ecff;
  --muted: #9aa6c8;
  --accent: #4f7dff;
  --accent2: #22d3ee;
  --radius: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(600px circle at 15% 0%, rgba(79,125,255,.22), transparent 60%),
    radial-gradient(700px circle at 85% 10%, rgba(34,211,238,.16), transparent 60%);
  pointer-events: none;
  z-index: -1;
}

a { color: inherit; text-decoration: none; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1080px;
  margin: 0 auto;
  padding: 22px 24px;
}

.logo {
  font-weight: 700;
  letter-spacing: .5px;
  font-size: 19px;
}

.nav nav a {
  margin-left: 22px;
  color: var(--muted);
  font-size: 15px;
  transition: color .2s;
}

.nav nav a:hover { color: var(--text); }

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.badge {
  display: inline-block;
  font-size: 13px;
  color: var(--accent2);
  border: 1px solid rgba(34,211,238,.35);
  background: rgba(34,211,238,.08);
  border-radius: 999px;
  padding: 4px 14px;
  margin: 0 0 22px;
}

.hero h1 {
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.12;
  margin: 0 0 20px;
  background: linear-gradient(120deg, #ffffff 20%, #9fc0ff 55%, #7ef0ff 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sub {
  color: var(--muted);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 34px;
}

.actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform .18s, box-shadow .18s, background .18s;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), var(--accent2));
  color: #06122b;
  box-shadow: 0 10px 30px rgba(79,125,255,.35);
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(79,125,255,.45);
}

.btn.ghost {
  border: 1px solid rgba(255,255,255,.18);
  color: var(--text);
}

.btn.ghost:hover { background: rgba(255,255,255,.06); }

h2 {
  font-size: 28px;
  margin: 0 0 26px;
}

section { padding: 56px 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform .2s, border-color .2s;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(79,125,255,.45);
}

.card .icon { font-size: 26px; }

.card h3 {
  margin: 12px 0 8px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.about p, .contact p {
  color: var(--muted);
  max-width: 680px;
}

.foot {
  border-top: 1px solid rgba(255,255,255,.07);
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding: 28px 0 40px;
}

@media (max-width: 600px) {
  .nav { flex-direction: column; gap: 10px; }
  .nav nav a { margin: 0 10px; }
  .hero { padding: 44px 0 36px; }
}