:root {
  --primary: #1677ff;
  --dark: #0b1c2d;
  --bg: #f7f9fc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
  color: #111;
  background: white;
}

.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: white;
  border-bottom: 1px solid #eee;
  z-index: 100;
}

.nav {
  max-width: 1200px;
  margin: auto;
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 18px;
}

.menu {
  display: flex;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.hero {
  padding-top: 120px;
  background: linear-gradient(180deg, #f0f6ff, white);
}

.hero-inner {
  max-width: 900px;
  margin: auto;
  padding: 80px 16px;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  color: #555;
}

.hero-actions {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  justify-content: center;
}

.section {
  max-width: 1200px;
  margin: auto;
  padding: 80px 16px;
}

.section.light {
  background: var(--bg);
}

.section h2 {
  text-align: center;
  margin-bottom: 48px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.card, .feature {
  padding: 32px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.cta {
  padding: 80px 16px;
  background: var(--dark);
  color: white;
  text-align: center;
}

.footer {
  padding: 32px;
  text-align: center;
  font-size: 14px;
  color: #888;
}

.btn-primary {
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  cursor: pointer;
}

.btn-outline {
  border: 1px solid var(--primary);
  color: var(--primary);
  padding: 8px 16px;
  border-radius: 6px;
}

.btn-ghost {
  background: transparent;
  border: 1px solid #ccc;
  padding: 12px 24px;
  border-radius: 6px;
}