.i_row {
  width: 1100px;
  margin: 0 auto;
}
.i_row:after {
  content: '';
  display: block;
  clear: both;
}

.i_padding {
  padding: 0px 10px;  
}

@media only screen and (max-width: 960px) {
  .i_row {
    width: 100%;
  }
}

#content_left {
  float: left;
  width: 58%;
}
#content_center {
  float: left;
  width: 4%;
  height: 20px;
}
#content_right {
  float: left;
  width: 38%;
}
#content_right img {
  display: block;
  width: 100%;
}

@media only screen and (max-width: 768px) {
  #content_left {
    width: 100%;
  }
  #content_center {
    width: 100%;
  }
  #content_right {
    width: 100%;
  }
}