#Header1_HeaderTitle{
 font-family:"华文新魏";
 font-size:28px;
}
#but{
 font-family:"华文新魏";
 font-size:30px;
 margin-left:900px;
color:white;

}

.backtop {
             
                bottom: 20px;
                cursor: pointer;
                display: none;
                height: 70px;
                position: fixed;
                right: 20px;
                text-indent: -9999px;
                width: 70px;
                z-index: 100;
            }