#top_nav{
 display:none;
}

#home {
margin: 0 auto;
opacity: 0.9;
width: 65%;
min-width: 1080px;
background-color: #fff;
padding: 30px;
margin-top: 50px;
margin-bottom: 50px;
box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}

body{
color: #000;
    background-color: #e6e6e6;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
    background: url(//images.cnblogs.com/cnblogs_com/nicori/1943048/o_21030801000966119164_p0_master1200.jpg) fixed;
}

.avatar-user{
border-radius:50%!important
}