/*绿色通道*/ 
#green_channel { 
position: fixed; 
width: 360px; 
right:10px; 
bottom:10px; 
background-color:#ffffff; 
} 

/*回到顶部*/ 
#back-top { 
position: fixed; 
bottom: 50px; 
right: 10px; 
opacity:0.75; 
} 
#back-top a { 
width: 108px; 
width: 32px\9; 
display: block; 

/* transition */ 
-webkit-transition: 1s; 
-moz-transition: 1s; 
transition: 1s; 
} 
#back-top a:hover { 
color: #000; 
} 
/* arrow icon (span tag) */ 
#back-top span { 
width: 108px; 
width: 32px\9; 
height: 108px; 
display: block; 
margin-bottom: 7px; 
background:#ddd url(https://pic002.cnblogs.com/images/2011/36987/2011051823234124.png) no-repeat center center; 
background-color: transparent\9; 

/* rounded corners */ 
-webkit-border-radius: 15px; 
-moz-border-radiu

/*宽度调节*/
#home {
    width: 98%;
}
#mainContent {
    width: 81%;
}
#div_digg {
    right: 19.5%;
}