.postbit_background1 {
position: absolute;
height: 100%;
width: 100%;
background: no-repeat;
opacity: 1.40;
background-position: center;
top: 0px;
left: 0px;
z-index: 1;
}
.postbit_marcoimagen {
position: absolute;
height: 100%;
width: 100%;
opacity: 1.40;
border-radius: 15px;
background-repeat: no-repeat;
background: no-repeat;
left: 0px;
}