:root {
  --bg: #0b1020;
  --bg-alt: #0f1630;
  --surface: #141c3a;
  --text: #e8ecf8;
  --text-dim: #9aa5c4;
  --accent: #4f8cff;
  --accent-2: #38d9a9;
  --radius: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

a { color: inherit; text-decoration: none; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 16, 32, .82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; font-size: 18px; letter-spacing: .5px; }
.brand-icon { margin-right: 6px; }
.nav-links { display: flex; gap: 28px; font-size: 15px; color: var(--text-dim); }
.nav-links a:hover { color: var(--text); }

/* Hero */
.hero {
  padding: 96px 0 72px;
  text-align: center;
  background:
    radial-gradient(600px 300px at 50% -60px, rgba(79,140,255,.25), transparent 70%),
    radial-gradient(400px 240px at 80% 120px, rgba(56,217,169,.12), transparent 70%);
}
.hero-eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 2px;
  color: var(--accent-2); text-transform: uppercase; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(34px, 6vw, 56px); font-weight: 800; line-height: 1.25; }
.gradient-text {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 22px auto 0; max-width: 620px; color: var(--text-dim); font-size: 18px; }
.hero-cta { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 13px 30px; border-radius: 999px;
  font-size: 16px; font-weight: 600; transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(90deg, var(--accent), #6ba3ff);
  color: #fff; box-shadow: 0 8px 24px rgba(79,140,255,.35);
}
.btn-ghost { border: 1px solid rgba(255,255,255,.22); color: var(--text); }
.btn-light { background: #fff; color: #123; }

.hero-stats { margin-top: 64px; display: flex; justify-content: center; gap: 64px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat strong { font-size: 30px; font-weight: 800; color: var(--text); }
.stat span { font-size: 14px; color: var(--text-dim); }

/* Sections */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { text-align: center; font-size: clamp(26px, 4vw, 36px); font-weight: 800; }
.section-sub { text-align: center; color: var(--text-dim); margin-top: 12px; }

/* Cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 52px; }
.card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); border-color: rgba(79,140,255,.45); }
.card-icon { font-size: 30px; margin-bottom: 14px; }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 15px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 52px; }
.step {
  text-align: center; padding: 34px 26px;
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.06);
}
.step-num {
  width: 44px; height: 44px; margin: 0 auto 16px;
  display: grid; place-items: center;
  border-radius: 50%; font-weight: 800; font-size: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 15px; }

/* Quotes */
.quote-card {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.06); padding: 28px 26px;
}
.quote-card blockquote { font-size: 15px; color: var(--text); }
.quote-card figcaption { margin-top: 16px; font-size: 14px; color: var(--accent-2); }

/* CTA band */
.cta-band {
  padding: 72px 0; text-align: center;
  background: linear-gradient(120deg, rgba(79,140,255,.18), rgba(56,217,169,.18));
  border-top: 1px solid rgba(255,255,255,.06);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.cta-band h2 { font-size: clamp(24px, 4vw, 32px); font-weight: 800; }
.cta-band p { color: var(--text-dim); margin: 10px 0 26px; }

/* Footer */
.footer { padding: 44px 0 36px; background: #080c18; }
.footer-inner { text-align: center; display: flex; flex-direction: column; gap: 10px; }
.footer-brand { font-weight: 600; }
.footer-links { display: flex; gap: 22px; justify-content: center; font-size: 14px; color: var(--text-dim); }
.footer-links a:hover { color: var(--text); }
.footer-icp a { color: var(--text-dim); font-size: 14px; }
.footer-icp a:hover { color: var(--accent); }
.footer-copy { font-size: 13px; color: #56618a; }

@media (max-width: 820px) {
  .grid-3, .steps { grid-template-columns: 1fr; }
  .hero { padding: 72px 0 56px; }
  .hero-stats { gap: 36px; }
  .nav-links { gap: 16px; font-size: 14px; }
}