body {
    background-image: url('https://www.ncr.junyanese.site/img/bg.png') !important;
    background-color: rgba(255, 255, 255, 0.2) !important;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    background-blend-mode: overlay !important;
}