/* 全体設定 */
body {
    margin: 0;
    font-family: "Helvetica Neue", sans-serif;
    background-color: #f4f9ff;
    color: #333;
    line-height: 1.6;
  }
  
  .container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* ヘッダー */
  .header {
    background-color: #ffffff;
    border-bottom: 1px solid #ddd;
    padding: 20px 0;
  }
  
  .logo {
    font-size: 24px;
    color: #2a85d0;
    margin: 0;
  }
  
  .nav-list {
    list-style: none;
    display: flex;
    gap: 20px;
    padding: 0;
  }
  
  .nav-list a {
    text-decoration: none;
    color: #2a85d0;
    font-weight: bold;
  }
  
  /* ヒーローセクション */
  .hero {
    background: linear-gradient(to right, #d4edff, #eaf6ff);
    text-align: center;
    padding: 80px 20px;
  }
  
  .hero h2 {
    font-size: 36px;
    color: #115c9e;
    margin-bottom: 10px;
  }
  
  .hero p {
    font-size: 18px;
    margin-bottom: 30px;
  }
  
  .btn {
    display: inline-block;
    background-color: #2a85d0;
    color: #fff;
    padding: 12px 24px;
    border-radius: 25px;
    text-decoration: none;
    transition: background 0.3s;
  }
  
  .btn:hover {
    background-color: #1a6fb2;
  }
  
  /* 特徴セクション */
  .features {
    padding: 60px 20px;
    background-color: #fff;
  }
  
  .features h3 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
  }
  
  .feature-grid {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: space-between;
  }
  
  .feature-item {
    flex: 1;
    min-width: 250px;
    background-color: #f0f7ff;
    padding: 20px;
    border-radius: 10px;
  }
  
  .feature-item h4 {
    color: #2a85d0;
  }
  
  /* フッター */
  .footer {
    background-color: #e9f3fb;
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
    color: #555;
  }