#site_nav_under {
  display: none;
 }
  .c_ad_block, .ad_text_commentbox {
  display: none;
  margin: 0;
  padding: 0;
  }
  #ad_under_google {
height: 0;
 overflow: hidden;
 }
 #ad_under_google a {
 display: none;
 }
 #home {
margin: 0 auto;
 width: 65%;
min-width: 950px;
 background-color: #fff;
 padding: 30px;
 margin-top: 30px;
margin-bottom: 50px;
box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}
 #blogTitle {
height: 60px;
 clear: both;
}
 #navigator {
 font-size: 13px;
 border-bottom: 1px solid #ededed;
border-top: 1px solid #ededed;
 height: 50px;
 clear: both;
margin-top: 25px;
 }
 #blogTitle h2 {
 font-weight: normal;
 font-size: 18px;
 font-size: 1.18571429rem;
line-height: 2.546153846;
 color: #757575;
float: left;
 }

body{
 background-image:url("https://ss3.baidu.com/9fo3dSag_xI4khGko9WTAnF6hhy/zhidao/pic/item/a8014c086e061d95700ca6f579f40ad163d9cab1.jpg");
 background-repeat:no-repeat;
 background-size:100%;
background-attachment: fixed;
 filter:alpha(opacity=70); -moz-opacity:0.7; -khtml-opacity: 0.7; opacity: 0.7;
}