body
{ 
 //background-image: url(https://img2020.cnblogs.com/blog/457232/202101/457232-20210118114027438-1021029506.png);
  background-color:#20fa25;
  background-repeat:repeat;
  //background-size:100% 100%;
}
#header {
   background-color:  #d0c7f7;
    height:133px;
    width: 100%;
}
//#top_nav{/*广告*/
//  display: none;/*设置框架不显示*/
//  overflow: hidden;/*框架超出部分隐藏*//*下同*/
//}