.visual
{
  width: 460px;
  height: 270px;
  margin: 0 0 18px 150px;
  position: relative;
}
.visual img
{
  position: absolute;
  top: 0;
  left: 0;
  width: 460px;
  height: 260px;
}
.visual div.frame
{
  z-index: 4;
  position: absolute;
  top: -5px;
  left: -5px;
  width: 470px;
  height: 270px;
  background: url(images/projects/frame.png) left top no-repeat;
}