.popup-bk {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.75);
    z-index: 9999;
    overflow: hidden;
}
.popup-content {
    margin:100px auto;
    width:400px;
    height:600px;
}

.popup-close {
    padding: 0 7px;
    border-style:solid;
    border-width:2px;
    line-height: 22px;
    background-color: #FFF;
    width:27px;
    height:27px;
    border-radius:999em;
    margin: -10px 0 0 385px;
    position: absolute;
    z-index: 123;
    float: right;
    cursor:pointer;
    color:#bebebe;
}


.loader {
    position: absolute;
    padding:25px;
    left: 40%;
    top: 50%;
    margin-left: 10%;
    transform: translate3d(-50%, -50%, 0);
}
.round {
    background: #3ac;
    width: 24px;
    height: 24px;
    border-radius: 100%;
    animation: slide 1s infinite;
    display: inline-block;
}
.round:nth-child(1) {
    animation-delay: 0.4s;
    background: #5487e6;
}
.round:nth-child(2) {
    animation-delay: 0.5s;
    background: #64aacc;
}
.round:nth-child(3) {
    animation-delay: 0.6s;
    background: #5487e6;
}
.round:nth-child(4) {
    animation-delay: 0.7s;
    background: #64aacc;
}

@-moz-keyframes slide {
    0% {
        transform: scale(1);
    }
    50% {
        opacity: 0.3;
        transform: scale(2);
    }
    100% {
        transform: scale(1);
    }
}
@-webkit-keyframes slide {
    0% {
        transform: scale(1);
    }
    50% {
        opacity: 0.3;
        transform: scale(2);
    }
    100% {
        transform: scale(1);
    }
}
@-o-keyframes slide {
    0% {
        transform: scale(1);
    }
    50% {
        opacity: 0.3;
        transform: scale(2);
    }
    100% {
        transform: scale(1);
    }
}
@keyframes slide {
    0% {
        transform: scale(1);
    }
    50% {
        opacity: 0.3;
        transform: scale(2);
    }
    100% {
        transform: scale(1);
    }
}