#right_all
{
    width:721px;
    height:auto;
    margin-left:auto;
    margin-right:auto;
}
#environment_top
{
    background-image:url(../images/biaotigongsihuanjing.JPG);
    width:721px;
    height:77px;
}
#daohang
{
    float:right;
    margin-right:23px;
    margin-top:50px;
    font-family:宋体;
    font-size:14px;
}
#enviroment_content
{
   margin:30px auto 0px auto;
    width:620px;
    height:auto;
}
.float_photo
{
    float:left;
    width:310px;
    height:240px;
}