body {
    background-color: #fff;
    overflow-x: hidden;
  }
  
  a, a:hover {
    text-decoration: none;
  }
  
  header {
    width: 100%;
    height: 40px;
    padding-top: 15px;
  }
  
  .intro h5 {
    margin-top: 30px;
    text-align: center;
  }
  
  .footer {
    margin-top: 100px;
  }
  
  .text-center.img-center {
    margin-top: 80px;
  }
  
  .c-list a {
    padding: 20px;
    background-color: #fff;
    display: block;
    margin: 0;
    color: #222;
    border-bottom: 1px solid #222;
  }
  
  .c-list img {
    margin-right: 20px;
    width: 30px;
    height: 30px;
  }
  
  .nav.nav-tabs {
    margin-top: 30px;
  }
  
  .nav-tabs .nav-item.show .nav-link, .nav-tabs .nav-link.active {
    color: #000;
    background: transparent;
    border: 0;
    border-bottom: 2px solid;
  }
  
  .nav-tabs .nav-link {
    color: #000;
  }