/* 加载、蒙版 */
#loading {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;

    width: 40px;
    height: 40px;

    border: 5px solid #f3f3f3;
    border-top: 5px solid #555;
    border-radius: 50%;

    z-index:1000; 
    
    animation: spin 2s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
#fullbg { 
    background-color:black;
    opacity:0.6; 
    filter:alpha(opacity=80); 
    -moz-opacity:0.5; 
    -khtml-opacity:0.5;

    position:absolute; 
    top:0; 
    left:0;
    z-index:999; 
}