.g-container_inner{
  max-width:1064px;
  margin:80px auto 0;
  padding:0 20px 40px
}
.g-container_inner .error-text{
  width: 600px;
  display: block;
  margin: 80px auto 80px;
}

.error-404 {
    display: block;
    margin: 0 auto;
  }

 .error-text h2.contentTitle {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 25px;
    letter-spacing: 0.2em;
    text-align: center;
  }

  .top-back {
    text-align: center;
    padding: 10px;
    display: block;
    }
    
    @media only screen and (max-width: 600px){
    .g-container_inner .error-text {
    width: 90%;
    margin: 90px auto 40px;
    }
    .error-404 {
        width: 80%;
      }


    }