:root {
  --bg: #060606;
  --fg: #f8f3e7;
  --primary: #8f63ff;
  --border: rgba(255,255,255,0.1);
  --muted: rgba(255,255,255,0.68);
  --soft: rgba(255,255,255,0.04);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--fg);
  background:
    radial-gradient(circle at top, rgba(143,99,255,0.26), transparent 30%),
    linear-gradient(180deg, #080808 0%, #050505 50%, #080808 100%);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.header-wrap { position: fixed; top: 16px; left: 0; width: 100%; z-index: 30; }
.nav-shell {
  width: fit-content; max-width: 100%; margin: 0 auto; padding: 12px 20px;
  border: 1px solid var(--border); border-radius: 999px;
  background: rgba(12,12,12,0.78); backdrop-filter: blur(18px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.28);
}
.nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px 28px; }
.nav a { color: rgba(248,243,231,0.74); font-size: 15px; }
.nav a:hover { color: var(--fg); }
.hero { position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(circle at 82% 26%, rgba(143,99,255,0.16), transparent 24%),
    radial-gradient(circle at 18% 18%, rgba(255,255,255,0.07), transparent 28%);
}
.hero-inner { position: relative; z-index: 1; min-height: 100svh; display: flex; align-items: center; }
.hero-stack { max-width: 760px; padding: 120px 0 72px; }
.badge {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px;
  border: 1px solid rgba(143,99,255,0.3); border-radius: 999px;
  background: rgba(143,99,255,0.1); color: var(--primary); font-size: 14px;
}
.hero-icon { width: 88px; height: 88px; border-radius: 22px; margin: 24px 0 28px; box-shadow: 0 18px 42px rgba(143,99,255,0.22); }
.hero h1, .section-heading h2, .legal h1 { margin: 0; font-size: clamp(42px, 8vw, 76px); line-height: 1.02; font-weight: 700; }
.hero p.lead { margin: 24px 0 0; max-width: 720px; font-size: 20px; line-height: 1.9; color: rgba(248,243,231,0.72); }
.hero p.subtle { margin: 22px 0 0; max-width: 720px; font-size: 14px; line-height: 1.9; color: rgba(248,243,231,0.45); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 52px;
  padding: 0 22px; border-radius: 999px; font-size: 15px; font-weight: 600;
}
.btn-primary { background: linear-gradient(135deg, #ab89ff 0%, #7448ee 100%); color: #f8f4ff; box-shadow: 0 16px 34px rgba(143,99,255,0.25); }
.btn-secondary { border: 1px solid rgba(255,255,255,0.12); background: rgba(255,255,255,0.04); color: var(--fg); }
.section { padding: 72px 0; }
.section.alt { background: linear-gradient(180deg, transparent 0%, rgba(255,255,255,0.02) 100%); }
.section-heading { max-width: 760px; margin: 0 auto 32px; text-align: center; }
.section-heading.left { margin: 0 0 24px; text-align: left; }
.kicker { margin: 0 0 14px; color: rgba(143,99,255,0.82); letter-spacing: 0.18em; text-transform: uppercase; font-size: 12px; }
.section-heading h2 { font-size: clamp(34px, 5vw, 52px); }
.section-heading p { margin: 16px 0 0; color: var(--muted); line-height: 1.9; }
.grid { display: grid; gap: 16px; }
.cards-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cards-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .faq-item, .legal-shell {
  border: 1px solid var(--border); border-radius: 24px; background: var(--soft); backdrop-filter: blur(14px);
}
.card { padding: 24px; }
.card .index, .card .tag { display: inline-block; margin-bottom: 16px; color: rgba(143,99,255,0.82); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; }
.card h3 { margin: 0; font-size: 20px; }
.card p { margin: 14px 0 0; color: var(--muted); line-height: 1.85; }
.download-shell, .contact-shell { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 0.95fr); gap: 24px; align-items: start; }
.download-note { font-size: 14px; color: rgba(248,243,231,0.48); }
.faq-list { max-width: 760px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item { padding: 18px 20px; }
.faq-item summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; font-weight: 600; font-size: 18px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: rgba(143,99,255,0.88); font-size: 24px; line-height: 1; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin: 14px 0 0; color: var(--muted); line-height: 1.85; }
.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.contact-card { padding: 20px; border: 1px solid var(--border); border-radius: 24px; background: var(--soft); min-width: 0; }
.contact-card span { display: block; color: rgba(248,243,231,0.45); font-size: 14px; }
.contact-card strong { display: block; margin-top: 10px; font-size: 19px; overflow-wrap: anywhere; word-break: break-word; }
.footer { border-top: 1px solid var(--border); background: rgba(255,255,255,0.02); padding: 24px 0 40px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer p { margin: 6px 0 0; color: rgba(248,243,231,0.55); }
.footer strong { font-size: 16px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.legal { padding: 120px 0 48px; }
.legal-shell { max-width: 920px; margin: 0 auto; padding: 32px; }
.legal h1 { font-size: clamp(34px, 5vw, 52px); }
.legal h2 { margin: 32px 0 0; font-size: 24px; }
.legal h3 { margin: 24px 0 0; font-size: 18px; }
.legal p, .legal li { color: var(--muted); line-height: 1.9; }
.legal ul { margin: 12px 0 0; padding-left: 20px; }
@media (max-width: 900px) {
  .cards-4, .cards-2, .download-shell, .contact-shell, .contact-grid, .footer-inner { grid-template-columns: 1fr; display: grid; }
  .footer-inner { gap: 14px; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 24px, 1180px); }
  .header-wrap { top: 12px; }
  .nav-shell { width: 100%; padding: 12px 14px; }
  .nav { gap: 12px 18px; }
  .hero-stack { padding-top: 108px; }
  .hero-icon { width: 76px; height: 76px; border-radius: 18px; }
  .actions { flex-direction: column; }
  .btn { width: 100%; }
  .section { padding: 60px 0; }
  .card, .legal-shell { padding: 20px; }
}