.split .col-left
 {
  float: left;
  width: 31.33%;
  /*width: 48%;*/
  margin-right: 4%;
  box-sizing: border-box;
}

.split .col-right {
  float: left;
  width: 64.44%;
  /*width: 48%;*/
  margin-right: 4%;
  box-sizing: border-box;
}

/* rechte Spalte ohne zusätzlichen Abstand */
.split .col-right {
  margin-right: 0;
}

/* Clearfix für den Wrapper */
.split::after {
  content: "";
  display: table;
  clear: both;
}

/* Responsive für kleine Bildschirme */
@media screen and (max-width: 768px) {
  .split .col-left,
  .split .col-right {
    width: 100%;
    float: none;
    margin-right: 0;
  }
}