.newtwitterbtn{
  width: 75px;
  margin:0 5px 0 0;
}
.forsp,.sptab{
display: none;
}
.post-head {
margin-bottom: 30px;
}
.sad{
 {max-height: 600px;}
}

.fixnav2{height: 600px;}
.fixnavwebside{height: 470px;}
.fixnav{height: 320px;}
.fixnav,.fixnav2,.fixnavwebside{max-width: 300px;}
.fixed_not{position: relative; top: 10px;}
.fixed{position: fixed; top: 10px;}
.fixed_releace{position: absolute; bottom: 580px;}