@media screen and (max-width: 800px) {
  .search-area {
    visibility: hidden;
    display: none;
  }
  
  #item_top_box {
    border-right: none;
    border-bottom: 1pt solid #cccccc;
  }
  
  #item_top_box2 {
    padding-top:20px;
  }
  
  .product-info {
    padding-top:20px;
  }
}

@media screen and (min-width: 800px) {
    #item_top_box {
        border-right: 1pt solid #cccccc;
    }
}