:root {
  --bg: #09090e;
  --panel: #12121a;
  --panel-soft: #181823;
  --line: rgba(255,255,255,.10);
  --text: #f7f5ff;
  --muted: #aaa7b8;
  --purple: #8658f4;
  --purple-light: #aa8cff;
  --success: #8fe0ba;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, rgba(134,88,244,.17), transparent 36rem),
    var(--bg);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(9,9,14,.82);
  backdrop-filter: blur(18px);
}
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 760; letter-spacing: .04em; }
.brand img { width: 38px; height: 38px; border-radius: 11px; }
.nav-links { display: flex; align-items: center; gap: 26px; color: var(--muted); font-size: 14px; }
.nav-links a:hover, .footer-links a:hover { color: var(--text); }
.hero { padding: 112px 0 88px; text-align: center; }
.eyebrow { color: var(--purple-light); font-size: 14px; font-weight: 700; letter-spacing: .18em; }
h1 { max-width: 880px; margin: 22px auto 18px; font-size: clamp(42px, 7vw, 78px); line-height: 1.08; letter-spacing: -.045em; }
.lead { max-width: 680px; margin: 0 auto; color: var(--muted); font-size: clamp(16px, 2vw, 20px); }
.actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  min-height: 48px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  font-weight: 700;
  background: var(--panel-soft);
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.button:hover { transform: translateY(-2px); border-color: rgba(255,255,255,.24); }
.button.primary { background: linear-gradient(135deg, var(--purple-light), var(--purple)); border-color: transparent; }
.section { padding: 72px 0; }
.section-heading { margin-bottom: 30px; }
.section-heading h2 { margin: 0 0 10px; font-size: clamp(30px, 4vw, 46px); letter-spacing: -.03em; }
.section-heading p { margin: 0; max-width: 680px; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-grid { grid-template-columns: repeat(4, 1fr); }
.card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(255,255,255,.045), rgba(255,255,255,.018));
  padding: 28px;
}
.card h3 { margin: 0 0 10px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); }
.plan { position: relative; display: flex; flex-direction: column; min-height: 440px; }
.plan.recommended { border-color: rgba(170,140,255,.62); box-shadow: 0 20px 70px rgba(94,52,206,.18); }
.tag { position: absolute; right: 22px; top: 22px; color: var(--success); font-size: 12px; font-weight: 700; }
.plan-name { color: var(--muted); font-size: 15px; }
.price { margin: 10px 0 6px; font-size: 46px; font-weight: 800; letter-spacing: -.04em; }
.price small { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.plan-desc { min-height: 54px; }
.plan ul { margin: 22px 0 28px; padding: 0; list-style: none; color: #ddd9e8; }
.plan li { padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,.065); }
.plan li::before { content: "✓"; color: var(--success); margin-right: 10px; }
.plan .button { margin-top: auto; }
.rule-note { margin-top: 18px; color: var(--muted); font-size: 13px; }
.steps { counter-reset: steps; }
.step::before {
  counter-increment: steps;
  content: "0" counter(steps);
  display: block;
  color: var(--purple-light);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .14em;
  margin-bottom: 22px;
}
.faq details { border-top: 1px solid var(--line); padding: 20px 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { color: var(--muted); margin: 12px 0 0; }
.site-footer { margin-top: 70px; border-top: 1px solid var(--line); padding: 34px 0 44px; color: var(--muted); font-size: 13px; }
.footer-row { display: flex; justify-content: space-between; gap: 26px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.legal { max-width: 860px; padding: 72px 0; }
.legal h1 { margin: 0 0 8px; font-size: clamp(34px, 5vw, 54px); text-align: left; }
.legal .updated { color: var(--muted); margin-bottom: 42px; }
.legal h2 { margin: 38px 0 10px; font-size: 23px; }
.legal h3 { margin: 24px 0 8px; font-size: 18px; }
.legal p, .legal li { color: #c7c3d2; }
.legal a { color: var(--purple-light); }
.purchase-box { max-width: 760px; margin: 0 auto; }
.notice { border: 1px solid rgba(170,140,255,.35); background: rgba(134,88,244,.08); border-radius: 16px; padding: 20px; color: #ded6f8; }
.contact-card { margin-top: 18px; text-align: center; }
.space-top { margin-top: 24px; }
.contact-email { display: block; margin: 12px 0 22px; color: var(--purple-light); font-size: 21px; font-weight: 800; }

@media (max-width: 900px) {
  .grid, .feature-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { gap: 14px; }
}
@media (max-width: 640px) {
  .wrap { width: min(calc(100% - 28px), var(--max)); }
  .nav { min-height: 64px; }
  .nav-links a:not(:last-child) { display: none; }
  .hero { padding: 82px 0 58px; }
  .grid, .feature-grid { grid-template-columns: 1fr; }
  .section { padding: 54px 0; }
  .plan { min-height: auto; }
  .plan-desc { min-height: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}