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

body {
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8f9fa;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background-color: #1e3a8a;
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1 {
  font-size: 1.8rem;
  font-weight: bold;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-menu a:hover {
  color: #60a5fa;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  font-weight: bold;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  display: inline-block;
}

.btn-primary {
  background-color: #f59e0b;
  color: white;
}

.btn-primary:hover {
  background-color: #d97706;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background-color: white;
  color: #1e40af;
}

/* Features Section */
.features {
  padding: 4rem 0;
  background-color: white;
}

.features h3 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: #1e40af;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: #f8f9fa;
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  border: 1px solid #e5e7eb;
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.feature-card h4 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #1e40af;
}

/* Disclaimer Notice */
.disclaimer-notice {
  padding: 2rem 0;
  background-color: #fef3c7;
}

.notice-box {
  background-color: #fffbeb;
  border: 1px solid #f59e0b;
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
}

.notice-box h4 {
  color: #92400e;
  margin-bottom: 0.5rem;
}

.notice-box a {
  color: #1e40af;
  text-decoration: underline;
}

/* Footer */
.footer {
  background-color: #374151;
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h5 {
  margin-bottom: 1rem;
  color: #60a5fa;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #d1d5db;
  text-decoration: none;
}

.footer-section a:hover {
  color: #60a5fa;
}

.footer-bottom {
  border-top: 1px solid #4b5563;
  padding-top: 1rem;
  text-align: center;
  color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    flex-direction: column;
    gap: 1rem;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}