.index-loading {
    position: fixed;
    z-index: 999;
    width: 50px;
    height: 50px;
    left: 50%;
    top: 50%;
    margin-left: -25px;
    margin-top: -25px;
    -webkit-animation: progressRotate 0.6s linear infinite;
    animation: progressRotate 0.6s linear infinite;
}

@-webkit-keyframes progressRotate {
    0% {
        -webkit-transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
    }
}

@keyframes progressRotate {
    0% {
        -webkit-transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
    }
}