small-program/src/app.scss

html,
body,
page {
    color: #3A3B3C;
}

.background-image {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 80;
}

.background-content {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 100;
}