body.bg-1 {
background-image: url(../images/backgrounds-1.jpg);
background-repeat: repeat, no-repeat;
background-position: left top;
background-size: auto, cover;
}
.login_main {
display: block;
text-align: center;
width:460px;
color: white;
position:absolute;
top:0px;bottom:0px;
left:50%;
margin-left:-230px;
}
/*背景半透明*/
.tm_png {
   
    background-color:transparent ;  
     background-image:url(../images/transparent.png) ;
/*_filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=scale, src="../images/transparent.png");*/
}