:root {
  --bg: #0b1020;
  --bg-soft: #121937;
  --card: #172246;
  --text: #edf1ff;
  --muted: #b9c2ea;
  --line: #2a376b;
  --primary: #4f7cff;
  --primary-hover: #3a67ea;
  --max: 1100px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

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

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(11, 16, 32, 0.82);
  border-bottom: 1px solid #1e2a57;
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand { font-weight: 700; }
.menu { display: flex; gap: 16px; color: var(--muted); font-size: 14px; }
.menu a:hover { color: #fff; }

.btn {
  display: inline-block;
  padding: 11px 16px;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { background: #1b2752; }

.hero {
  padding: 72px 0 44px;
  background: radial-gradient(1000px 500px at 30% -20%, #2b408f 0%, transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.pill {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid #3150b8;
  border-radius: 999px;
  font-size: 12px;
  color: #c8d4ff;
}

h1 { font-size: clamp(28px, 4vw, 46px); line-height: 1.2; margin: 14px 0; }
h2 { font-size: 30px; margin: 0 0 18px; }
h3 { margin-top: 0; }

.lead {
  color: var(--muted);
  line-height: 1.7;
  max-width: 700px;
}

.tip { color: #9fb0ea; font-size: 13px; margin-top: 10px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

.section { padding: 62px 0; }
.section-alt { background: var(--bg-soft); border-top: 1px solid #1b2752; border-bottom: 1px solid #1b2752; }

.grid-3, .grid-4 {
  display: grid;
  gap: 14px;
}
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  line-height: 1.7;
}

.kpi ul {
  padding: 0;
  margin: 0;
  list-style: none;
}
.kpi li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px dashed #2c396d;
  padding: 10px 0;
}
.kpi li:last-child { border-bottom: 0; }
.kpi span { color: var(--muted); }

.steps {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}
.steps li { padding-left: 4px; color: var(--muted); }
.steps strong { color: #fff; display: block; margin-bottom: 4px; }

.cta { text-align: center; }
.cta p { color: var(--muted); max-width: 760px; margin: 0 auto; }
.cta .hero-actions { justify-content: center; }

.footer {
  border-top: 1px solid #1e2a57;
  background: #090f1f;
  padding: 34px 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}
.footer h4 { margin: 0 0 10px; color: #fff; }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 740px) {
  .menu { display: none; }
  .grid-3, .grid-4, .footer-grid { grid-template-columns: 1fr; }
  h2 { font-size: 24px; }
}