* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "Noto Sans KR", system-ui, -apple-system, sans-serif;
  color: #0f172a;
}

body {
  background: #f8fafc;
  line-height: 1.6;
}

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

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e2e8f0;
}

.logo {
  font-weight: 700;
  font-size: 20px;
}

.nav {
  display: flex;
  gap: 16px;
  font-weight: 600;
}

.nav a {
  padding: 8px 12px;
  border-radius: 8px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav a:hover {
  background: #e2e8f0;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  padding: 72px 28px;
  background: linear-gradient(135deg, #0ea5e9, #2563eb);
  color: white;
}

.hero h1,
.hero p,
.hero .badge {
  color: white;
}

.hero-content .badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  font-weight: 600;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  margin-bottom: 12px;
  font-weight: 800;
}

.lead {
  margin-bottom: 20px;
  max-width: 520px;
  color: rgba(255, 255, 255, 0.9);
}

.actions {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 10px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.2s ease;
}

.btn.primary {
  background: white;
  color: #0f172a;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.btn.ghost {
  border-color: rgba(255, 255, 255, 0.5);
  color: white;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
}

.hero-visual {
  display: grid;
  gap: 12px;
}

.hero-visual .card {
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  padding: 16px;
  font-weight: 700;
  color: white;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.section {
  padding: 56px 28px;
}

.section h2 {
  font-size: clamp(24px, 4vw, 32px);
  margin-bottom: 12px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 12px;
}

.feature {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.04);
}

.feature h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.cta {
  background: #0f172a;
  color: white;
  border-radius: 14px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.2);
}

.cta h2,
.cta p {
  color: white;
}

.footer {
  text-align: center;
  padding: 20px;
  font-size: 14px;
  color: #475569;
}