@media screen and (max-width: 799px){
  .main-left {
    width: 0%;
  }
  .main-right .nav li {
    padding: 0 5px;
  }
  .main-right .nav li a {
    font-size: 16px;
    text-transform: none;
  }
  .main-left h1 {
    position: absolute;
    top: 10px;
    left: 100px;
    color: #000;
  }
}