:root {
  --color-bg: #f9f9f9;
  --color-primary: #1b65b1;
  --color-accent: #ffcc00;
  --color-text: #333;
  --font-main: 'Noto Sans JP', 'Segoe UI', sans-serif;
  --max-width: 1200px;
}

body {
  margin: 0;
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

a:hover,
a:visited,
a:active {
  color: inherit;
}

header {
  background-color: var(--color-primary);
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin: 0;
}

.tagline {
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
}

.hero {
  background: linear-gradient(to right, #1b65b1, #2287bd);
  color: white;
  padding: 3rem 1rem;
  text-align: center;
  border-radius: 8px;
}

.hero h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.cta-button {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-accent);
  color: #000;
  text-decoration: none;
  font-weight: bold;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.cta-button:hover {
  background-color: #e6b800;
}

.features {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  margin-top: 3rem;
}

.feature {
  background-color: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  max-width: 300px;
  color: #1b65b1;
  text-align: center;
}

.feature h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

footer {
  background-color: #222;
  color: #ccc;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .features {
    flex-direction: column;
    align-items: center;
  }

  .hero h2 {
    font-size: 1.5rem;
  }

  .cta-button {
    width: 100%;
    max-width: 300px;
  }
}