:root {
  --bg: #0b1020;
  --bg-soft: #121a33;
  --surface: #161f3d;
  --surface-2: #1c2750;
  --border: #26315c;
  --text: #e8ecf6;
  --muted: #9aa6c7;
  --primary: #5b8cff;
  --primary-2: #7c5cff;
  --accent: #21d4a8;
  --warn: #ffb454;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, .35);
  --maxw: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(124, 92, 255, .25), transparent 60%),
              radial-gradient(900px 500px at 0% 0%, rgba(33, 212, 168, .15), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(11, 16, 32, .72);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; gap: 18px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .3px; }
.brand .logo {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  display: grid; place-items: center; font-size: 16px; box-shadow: var(--shadow);
}
.nav .links { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.nav .links a { color: var(--muted); font-size: 14px; transition: color .2s; }
.nav .links a:hover { color: var(--text); }
.toggle-group { display: flex; gap: 6px; background: var(--surface); border: 1px solid var(--border); padding: 4px; border-radius: 999px; }
.toggle-group button {
  border: 0; background: transparent; color: var(--muted); cursor: pointer;
  padding: 6px 12px; border-radius: 999px; font-size: 13px; font-weight: 600;
}
.toggle-group button.active { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: 11px 18px; border-radius: 12px; font-weight: 700; font-size: 14px; transition: transform .12s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  border: 0; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 10px 30px rgba(91, 140, 255, .35);
}
.btn-ghost { background: transparent; }
.btn-sm { padding: 8px 14px; font-size: 13px; }

/* Hero */
.hero { padding: 86px 0 60px; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--accent);
  background: rgba(33, 212, 168, .1); border: 1px solid rgba(33, 212, 168, .3);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(34px, 5vw, 58px); line-height: 1.1; margin: 0 0 18px; font-weight: 800; }
.hero h1 .grad { background: linear-gradient(120deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: var(--muted); font-size: 18px; max-width: 640px; margin: 0 0 28px; }
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .stats { display: flex; gap: 36px; margin-top: 46px; flex-wrap: wrap; }
.hero .stats .n { font-size: 26px; font-weight: 800; }
.hero .stats .l { color: var(--muted); font-size: 13px; }

/* Sections */
section.block { padding: 70px 0; }
.section-title { font-size: clamp(26px, 3vw, 38px); font-weight: 800; margin: 0 0 10px; }
.section-sub { color: var(--muted); margin: 0 0 36px; max-width: 640px; }

.grid { display: grid; gap: 18px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: linear-gradient(180deg, var(--surface), var(--bg-soft));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
}
.card .ic { width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center; font-size: 20px;
  background: rgba(91, 140, 255, .14); border: 1px solid rgba(91, 140, 255, .3); margin-bottom: 14px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.plan {
  background: linear-gradient(180deg, var(--surface), var(--bg-soft));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 18px;
  display: flex; flex-direction: column; position: relative;
}
.plan.featured { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary), var(--shadow); }
.plan .tag { position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; font-size: 12px;
  font-weight: 700; padding: 4px 12px; border-radius: 999px; white-space: nowrap; }
.plan h4 { margin: 6px 0 4px; font-size: 16px; }
.plan .price { font-size: 30px; font-weight: 800; margin: 8px 0 2px; }
.plan .price .cur { font-size: 16px; color: var(--muted); margin-right: 2px; }
.plan .per { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 18px; display: grid; gap: 9px; }
.plan ul li { color: var(--muted); font-size: 13px; display: flex; gap: 8px; align-items: flex-start; }
.plan ul li::before { content: "✓"; color: var(--accent); font-weight: 800; }
.plan .btn { width: 100%; justify-content: center; margin-top: auto; }
.pay-note { color: var(--muted); font-size: 13px; text-align: center; margin-top: 18px; }

/* FAQ */
.faq { display: grid; gap: 12px; max-width: 820px; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { color: var(--muted); margin: 10px 0 0; font-size: 14px; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 40px 0; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }

/* Modal */
.modal-back { position: fixed; inset: 0; background: rgba(4, 8, 18, .7); display: none; place-items: center; z-index: 50; }
.modal-back.open { display: grid; }
.modal { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; width: min(440px, 92vw); box-shadow: var(--shadow); }
.modal h3 { margin: 0 0 6px; }
.modal p { color: var(--muted); font-size: 14px; }
.modal .qr { width: 200px; height: 200px; margin: 16px auto; border-radius: 12px; background: #fff; display: grid; place-items: center; color: #0b1020; font-size: 13px; text-align: center; padding: 10px; }
.modal .row { display: flex; gap: 10px; margin-top: 14px; }

/* Success / license modal */
.ok-wrap { text-align: center; }
.ok-badge {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 12px;
  display: grid; place-items: center; font-size: 28px; color: #fff;
  background: linear-gradient(135deg, var(--accent), #1bbf96);
  box-shadow: 0 10px 30px rgba(33, 212, 168, .35);
}
.ok-wrap h3 { margin: 0 0 8px; font-size: 20px; }
.ok-sub { color: var(--muted); font-size: 13.5px; margin: 0 0 16px; line-height: 1.7; }
.ok-sub b { color: var(--text); }
.lic-box {
  text-align: left; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 14px; margin-bottom: 12px;
}
.lic-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.lic-head span { color: var(--muted); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; }
.lic-copy {
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  font-size: 12px; font-weight: 700; padding: 5px 12px; border-radius: 8px; cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.lic-copy:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.lic-copy.copied { background: var(--accent); border-color: var(--accent); color: #042; }
.lic-code {
  margin: 0; font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px; line-height: 1.55; color: var(--text); white-space: pre-wrap;
  word-break: break-all; max-height: 150px; overflow: auto; user-select: all;
}
.ok-steps { text-align: left; margin: 0 0 14px; padding-left: 20px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.ok-steps li { margin-bottom: 2px; }
.ok-steps code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 5px;
  padding: 1px 6px; color: var(--text); font-size: 12px;
}
.ok-meta { color: var(--muted); font-size: 12.5px; margin-top: 2px; }

@media (max-width: 980px) {
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .grid.cols-3, .grid.cols-2, .pricing-grid { grid-template-columns: 1fr; }
  .nav .links a:not(.btn) { display: none; }
}