:root {
  --primary: #5A45CB;
  --primary-light: #9A8AFF;
  --bg: #0e0c1d;
  --bg-card: #171430;
  --text: #f2f0ff;
  --text-dim: #b9b3e0;
  --border: #2c2760;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a { color: var(--primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }
header.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0; border-bottom: 1px solid var(--border);
}
.logo { font-size: 22px; font-weight: 800; letter-spacing: 1px; }
.logo span { color: var(--primary-light); }
nav.links a { margin-left: 24px; color: var(--text-dim); font-size: 15px; }
nav.links a:hover { color: var(--text); }
.hero { text-align: center; padding: 96px 0 72px; }
.hero h1 { font-size: 44px; font-weight: 800; margin-bottom: 16px; }
.hero h1 .grad {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.sub { color: var(--text-dim); font-size: 18px; max-width: 640px; margin: 0 auto 32px; }
.btn {
  display: inline-block; background: var(--primary); color: #fff;
  padding: 14px 36px; border-radius: 12px; font-size: 17px; font-weight: 600;
}
.btn:hover { background: #4a38b5; text-decoration: none; }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); margin-left: 12px; }
section.block { padding: 56px 0; }
section.block h2 { font-size: 28px; margin-bottom: 28px; text-align: center; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px;
}
.card h3 { font-size: 18px; margin-bottom: 10px; color: var(--primary-light); }
.card p { color: var(--text-dim); font-size: 15px; }
.steps { counter-reset: step; max-width: 640px; margin: 0 auto; }
.step {
  position: relative; padding: 0 0 28px 56px;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.step h3 { font-size: 17px; margin-bottom: 6px; }
.step p { color: var(--text-dim); font-size: 15px; }
.pricing { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.price-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px; text-align: center;
}
.price-card.hot { border-color: var(--primary-light); box-shadow: 0 0 24px rgba(154,138,255,.15); }
.price-card h3 { font-size: 17px; margin-bottom: 8px; }
.price-card .price { font-size: 32px; font-weight: 800; color: var(--primary-light); margin: 8px 0; }
.price-card .price small { font-size: 14px; color: var(--text-dim); font-weight: 400; }
.price-card p { color: var(--text-dim); font-size: 14px; }
.faq { max-width: 720px; margin: 0 auto; }
.faq details {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px 22px; margin-bottom: 12px;
}
.faq summary { cursor: pointer; font-weight: 600; font-size: 16px; }
.faq details p { color: var(--text-dim); font-size: 15px; margin-top: 10px; }
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { font-size: 24px; margin: 40px 0 16px; text-align: left; }
.prose h3 { font-size: 18px; margin: 28px 0 10px; color: var(--primary-light); }
.prose p, .prose li { color: var(--text-dim); font-size: 15px; }
.prose ul { padding-left: 22px; margin: 10px 0; }
.prose .updated { color: var(--text-dim); font-size: 13px; margin-bottom: 8px; }
footer {
  border-top: 1px solid var(--border); margin-top: 40px;
  padding: 32px 0; text-align: center; color: var(--text-dim); font-size: 14px;
}
footer nav a { margin: 0 12px; color: var(--text-dim); }
@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  nav.links a { margin-left: 14px; }
}