body {
    background-image: URL(background.jpg);
    background-color: black;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    /*兼容浏览器版本*/
    -webkit-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

.LoginBg {
    width: 1334px;
    height: 750px;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.guide {
    width: 612px;
    height: 190px;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    visibility: hidden;
}

.loading {
    width: 150px;
    height: 15px;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    visibility: hidden;
}

.loadingtext {
    color: black;
    font-family: 'Microsoft YaHei';
    font-size: 18px;
}