@media print {
   .print_box {
     width: 700px;
     margin: auto;
   }
   .print_btn {
     display: none;
   }
}

.print_box {
  width: 700px;
  margin: auto;
}

.print_btn {
  margin: 0 auto 10px;
  padding: 5px;
  background: #f1f1f1;
  text-align: center;
}

.print_btn li {
    display: inline;
    padding: 0 10px;
}