.wechat-prompt {
        display: none; 
        position: fixed; 
        left:0; 
        top:0; 
        bottom:0; 
        background: rgba(0,0,0,0.8); 
        filter:alpha(opacity=80);  
        height: 100%; 
        width: 100%; 
        z-index: 100;
}
.wechat-prompt p {
        text-align: center; 
        margin-top: 10%;
	height: 80%;
        padding:0 5%;
}