.containner2:before {
    background: url("../img/takionb.jpg");
    width: 100%;
    opacity: 0.5;
    height: 100%;
    position: relative;
    background-size: cover;
}
body {
    width: 100%;
    min-height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    margin: 0;
    background: rgba(255,255,255,.5);
}

.containner2:after {
    content: "";
    background: url(../img/takionb.jpg) !important;
    opacity: 0.5;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    position: absolute;
    z-index: -1;
}