html body{
    background-image: url(/static/pic/bg.jpg);
    background-repeat: no-repeat;
    background-position: center top;
    background-size: cover;

}
#title{
    font-size: 28px;
    font-weight: bold;
    color: snow;
}
#subtitle{
    font-size: 14px;
    margin-top: 20px;
    color: snow;
}

html {
    height: 100%;
}