.newsletter main .contents {
    max-width: 800px;
  }
  .newsletter main .example-list li {
    padding: 16px;
    border: 1px solid #D1D1D1;
    border-radius: 4px;
  }
  .newsletter main .box {
    padding: 16px;
    border: 1px solid #333333;
    border-radius: 4px;
  }
  .newsletter main h4 {
    font-size: 1.4rem;
  }

  @media screen and (min-width: 768px) {
    .newsletter main a {
      color: #555555;
      text-decoration: underline;
    }
    .newsletter main a:hover {
      text-decoration: none;
    }
    .newsletter main .example-list {
      display: -webkit-box;
      display: -webkit-flex;
      display: -ms-flexbox;
      display: flex;
      -webkit-box-pack: justify;
      -webkit-justify-content: space-between;
          -ms-flex-pack: justify;
              justify-content: space-between;
      -webkit-flex-wrap: wrap;
          -ms-flex-wrap: wrap;
              flex-wrap: wrap;
    }
    .newsletter main .example-list li {
      width: 49%;
    }
  }

  @media screen and (max-width: 767px) {
    .newsletter main a {
      color: #333333;
      text-decoration: none;
    }
    .newsletter main a:hover {
      text-decoration: underline;
    }
    .newsletter main .main-title {
      margin-bottom: 30px;
      padding-bottom: 20px;
      padding-top: 30px;
      border-bottom: 2px solid #000;
      font-weight: bold;
      line-height: 1;
    }
  }