加下面的code应该有背景显示

<div id="articleBody" style="font-size:16px">
<div id="msgbodyContent">&nbsp;</div>
</div>
<link href="https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@500&amp;display=swap" rel="stylesheet" />
<link href="https://fonts.googleapis.com/css2?family=Londrina+Solid:wght@100;300;400;900&amp;display=swap" rel="stylesheet" />
<style type="text/css">:root{
    --fc1: #f20;
    --fc2: #ff0;
    --fc3: #04f;
    --fc4: #0f4;
    --fc5: #f0f;
    --fc: var(--fc1);
}

* {
  margin: 0 auto;
  padding: 0;
  box-sizing: border-box;
}
table{ background-color:transparent; margin-left: 0px !important; } td { background-color:transparent; } 
body:before {
  z-index: -2;
  opacity: 1.0;
  position: fixed;
  content: "";
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("https://cdn.wenxuecity.com/upload/album/03/95/35/ac62fa7f4019BpQDgTkf.jpg") center no-repeat;
  background-size: cover;
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-transform: scale(1.0);
          transform: scale(1.0);
}

.container {
  max-width: 42em;            
  margin: auto;
}
#postbody {width: 1024px !important; overflow: visible; padding: 0px; background: transparent !important; } .transp { filter:alpha(opacity=50); -moz-opacity:0.8; opacity:0.8; }
#page-wrap { font-family: 'Arial', sans-serif; color: #571A95; text-align: justify; border-radius: 20px; border: solid 0px white; padding-bottom: 50px; width: 720px; margin: 50px auto; padding: 40px; background-color: rgba(226,224,224,0.5); box-shadow: 0 0 10px 10px rgba(104,104,104, .6); }
</style>