* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

.app {
    max-width: 450px;
    width: 100%;
    margin: 0 auto;
    position: relative;
}

.btn {
    position: absolute;
    left: 0;
    right: 0;
    margin: 10% auto;
}

.bgimg {
    width: 100%;
    position: absolute;
    left: 0;
    top: 0;
}

#img {
    position: absolute;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: 100%;
}

.fxdiv {
    width: 46.8%;
    position: absolute;
    left: 0;
    right: 0;
    margin: 60.9% auto;
}

.divimg {
    width: 100%;
    height: 0;
    padding-bottom: 100%;
    position: relative;
}

.divimg img {
    position: absolute;
    width: 100%;
    height: 100%;

}
.indeximg img{
    width:100%;
    vertical-align: bottom;
}