.container-mitte {
  float:left;
  width:756px;
  margin-left:12px;
  margin-top:10px;
  border-style:solid;
  border-color:#C2C2C0;
  border-width:1px; 
  padding-left:0;
}

* html .container-mitte {
  float:left;
  width:756px;
  margin-left:12px;
  margin-top:10px;
  border-style:solid;
  border-color:#C2C2C0;
  border-width:1px; 
  padding-left:0;
  display:inline;
}

.content-box{
  margin:11px;
}