html,body,div,form,p,ul,li,h1,h2,h3,h4,h5,h6,img, input, textarea, table, tr, td, ol ,dl ,dd ,dt{
  margin:0;
  padding:0;
}
ul,ol,dl{
  list-style: none;
}
a{
  text-decoration: none;
  border:none;
}
input,textarea,button{
  outline: none;
}
body{
  font-family: "微软雅黑";
}