:root{
  --bg:#0f1028;
  --card:#ffffff;
  --text:#17172f;
  --muted:#666b80;
  --primary:#7b3cff;
  --pink:#ff5dc8;
  --cyan:#2de2ff;
  --line:#e9e9f3;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,"Noto Sans",sans-serif;
  color:var(--text);
  background:linear-gradient(135deg,#21115f 0%,#5926d6 38%,#13c8ff 100%);
  min-height:100vh;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.hero{
  color:white;
  padding:56px 20px 34px;
  text-align:center;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:800;font-size:34px;letter-spacing:.2px;
}
.logo-mark{
  width:42px;height:42px;border-radius:14px;
  background:linear-gradient(135deg,var(--pink),var(--cyan));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 12px 30px rgba(0,0,0,.24);
}
.hero h1{font-size:42px;line-height:1.08;margin:18px auto 12px;max-width:850px}
.hero p{font-size:18px;line-height:1.65;max-width:780px;margin:0 auto;color:rgba(255,255,255,.86)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px 48px}
.card{
  background:rgba(255,255,255,.96);
  border:1px solid rgba(255,255,255,.45);
  border-radius:24px;
  box-shadow:0 18px 60px rgba(22,8,75,.22);
  padding:28px;
  margin:18px 0;
}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  padding:22px;
}
.feature h3{margin:0 0 8px;font-size:20px}
.feature p{margin:0;color:var(--muted);line-height:1.55}
.badge{
  display:inline-block;
  padding:7px 12px;
  border-radius:999px;
  background:#f1ebff;
  color:#5b28d6;
  font-weight:700;
  font-size:13px;
}
.nav{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
  margin-top:24px;
}
.nav a{
  color:white;
  background:rgba(255,255,255,.15);
  border:1px solid rgba(255,255,255,.26);
  padding:10px 14px;
  border-radius:999px;
}
.doc{
  max-width:920px;
  margin:0 auto;
  background:white;
  padding:34px;
  border-radius:22px;
  box-shadow:0 18px 60px rgba(22,8,75,.20);
}
.doc h1{font-size:34px;margin:0 0 10px}
.doc h2{font-size:24px;margin-top:34px;border-top:1px solid var(--line);padding-top:24px}
.doc h3{font-size:18px;margin-top:22px}
.doc p,.doc li{line-height:1.7;color:#32334a}
.doc .meta{color:var(--muted);font-size:14px;margin-bottom:24px}
.doc ul{padding-left:22px}
.footer{
  text-align:center;color:rgba(255,255,255,.82);
  padding:26px 20px 40px;font-size:14px;
}
.footer a{color:white}
@media(max-width:800px){
  .grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .doc{padding:24px}
}