* {
    margin: 0;
    padding: 0
}

body {
    width: 100%;
    height: 100%
}

#content {
    width: 100%;
    height: 100%;
    margin: 0 auto;
    background: url("../static/betnew2/image/bg.jpg") no-repeat 50%;
    background-size: 100% 100%
}

.box {
    width: 100%;
    height: 100%
}

.middleBox {
    width: 100%;
    height: 144px;
    position: absolute;
    top: 35%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    z-index: 100
}

.btnBox {
    width: 100%;
    margin-top: 100px
}

#btn {
    width: 502px;
    height: 144px;
    margin: auto;
    cursor: pointer
}

#btn img {
    width: 100%;
    height: 100%
}