body, object, iframe, h1, h2, h3, h4, h5, h6, blockquote, p,a, code, em, img, q, small, strong, dd, dl, dt, li, ol, ul, fieldset, form, label, table, tbody, tr, th, td, input, textarea,span,strong{
  font-size: 14px;
  color: #000;
  font-family: "微软雅黑";
  margin: 0;
  padding: 0;
}
img{ max-width: 100%; }
ul, ol, li { list-style-type: none; }
a{ text-decoration: none; }
.clear{  clear:both; }
.fl { float: left; }
.fr { float: right; }
.clear:after{
  content: "020"; 
  display: block; 
  height: 0; 
  clear: both; 
  visibility: hidden;  
  }
.tab_x_y{
display: block;
}
.tab_x_n{
display: none;
}	@media screen and (max-width:750px) {
.main {

    width: 100%!important;
    margin-top: 45px!important;;
}
	}