html {
    height: 100%;
  }
  
  .container {
    width: 980px;
    margin: 20px auto;
    padding: 30px 0;
    overflow: hidden;
  }
  
  .container span,
  .container p,
  .container div {
    line-height: 1.6;
  }
  
  h1 {
    margin-bottom: 30px;
    font-size: 20px;
    font-weight: normal;
    position: relative;
    text-align: center;
  }
  
  .container h1 {
    width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
  
  h1 span {
    position: relative;
    z-index: 2;
    display: inline-block;
    margin: 0 4em;
    padding: 0 1em;
    background-color: #fff;
    text-align: left;
  }
  
  h1::before {
    position: absolute;
    top: 50%;
    z-index: 1;
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background: #ccc;
    background: -webkit-linear-gradient(-45deg, transparent, #ccc 10%, #ccc 90%, transparent);
    background: linear-gradient(-45deg, transparent, #ccc 10%, #ccc 90%, transparent);
  }
  
  .submit_area {
    margin-top: 45px;
    text-align: center;
  }