.picture_box {
    position:relative;
}
     
.picture_box .picture { 
	z-index: 0; 
	width: 100%;
    height: auto;
}
     
.picture_box .p_icon {
    z-index: 10;
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%,-50%);
    transform: translate(-50%,-50%);
    align-content: center;

}
     
.picture_box .p_icon img {
    width: 100%;
    max-width: 150px;
    height: auto;
}