xiaoben-as2-php/vue/ueditor/kityformula-plugin/kityformula/assets/styles/page.css

html, body {
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    background: rgba( 48, 48, 48, 0.5 );
}

body {
    height: 1000px;
}