:root{
  --bg:#0b0f17;
  --panel:#111827;
  --card:#0f172a;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --line:rgba(255,255,255,.10);
  --primary:#4f46e5;
  --primary2:#22c55e;
  --shadow: 0 12px 30px rgba(0,0,0,.35);
  --radius:16px;
  --max:1080px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--text);
  background: radial-gradient(1000px 600px at 10% 10%, rgba(79,70,229,.22), transparent 60%),
              radial-gradient(1000px 600px at 90% 20%, rgba(34,197,94,.18), transparent 55%),
              var(--bg);
  line-height:1.6;
}

a{color:inherit; text-decoration:none}
a:hover{opacity:.92}

.header{
  position:sticky; top:0; z-index:10;
  background: rgba(11,15,23,.72);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 18px;
}

.brand{display:flex; align-items:center; gap:10px}
.brand-logo{width:30px; height:30px}
.brand-name{font-weight:700; letter-spacing:.5px}

.nav{display:flex; gap:10px; flex-wrap:wrap}
.nav-link{
  padding:8px 10px;
  border-radius:999px;
  color:var(--muted);
  border:1px solid transparent;
}
.nav-link.is-active{
  color:var(--text);
  border-color: var(--line);
  background: rgba(255,255,255,.04);
}

.main{max-width:var(--max); margin:0 auto; padding:18px}
.section{padding:24px 0}
.section h1,.section h2{margin:0 0 12px}
.muted{color:var(--muted)}
.small{font-size:12px}

.hero{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap:16px;
  padding:18px;
  border:1px solid var(--line);
  background: rgba(17,24,39,.45);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero h1{margin:0 0 10px; font-size:34px; line-height:1.2}
.hero-art{display:flex; align-items:center; justify-content:center}
.hero-art img{max-width:100%; height:auto}

.hero-actions{display:flex; gap:10px; margin:14px 0 6px; flex-wrap:wrap}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 14px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  cursor:pointer;
  user-select:none;
}
.btn-primary{
  background: linear-gradient(135deg, var(--primary), rgba(79,70,229,.65));
  border-color: rgba(79,70,229,.55);
}
.btn-ghost{
  background: rgba(255,255,255,.02);
}

.badges{display:flex; gap:8px; flex-wrap:wrap; margin-top:10px}
.badge{
  font-size:12px;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
}

.grid-3{display:grid; grid-template-columns: repeat(3, 1fr); gap:12px}
.grid-2{display:grid; grid-template-columns: repeat(2, 1fr); gap:12px}

.card{
  border:1px solid var(--line);
  background: rgba(15,23,42,.55);
  border-radius: var(--radius);
  padding:16px;
  box-shadow: var(--shadow);
}
.card h2,.card h3{margin:0 0 8px}

.faq{display:grid; gap:10px}
.faq-item{
  border:1px solid var(--line);
  background: rgba(255,255,255,.02);
  border-radius: 14px;
  padding:10px 12px;
}
.faq-item summary{cursor:pointer; font-weight:600}

.list{margin:0; padding-left:18px}
.row{display:flex; align-items:center; gap:10px}
.icon{width:18px; height:18px}

.form{display:grid; gap:12px}
.field{display:grid; gap:6px}
input,textarea{
  width:100%;
  padding:10px 12px;
  color:var(--text);
  background: rgba(0,0,0,.20);
  border:1px solid var(--line);
  border-radius: 12px;
  outline:none;
}
input:focus,textarea:focus{border-color: rgba(79,70,229,.6)}
.toast{margin:0; min-height:18px; font-size:13px; color: var(--primary2)}

.footer{
  border-top:1px solid var(--line);
  padding:18px;
  margin-top:20px;
}
.footer-inner{
  max-width:var(--max);
  margin:0 auto;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
.footer-brand{display:flex; align-items:center; gap:10px}
.footer-logo{width:26px; height:26px}
.footer-title{font-weight:700}
.footer-meta{
  max-width:var(--max);
  margin:10px auto 0;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
}
.sep{opacity:.55}

.prose ul{padding-left:18px}
.prose a{color:#c7d2fe; text-decoration:underline}

@media (max-width: 860px){
  .hero{grid-template-columns: 1fr}
  .grid-3{grid-template-columns: 1fr}
  .grid-2{grid-template-columns: 1fr}
}