* {
  padding: 0;
  margin: 0;
}

/*去掉列表默认排列*/
ul,
ol,
li {
  list-style: none;
}

/*去掉底部横线*/
/*把a元素更改设置成块级元素，这个根据实际情况决定要不要*/
a {
  text-decoration: none;
  /* display: block; */
}



.clearfloat:after {
  display: block;
  clear: both;
  content: "";
  visibility: hidden;
  height: 0;
}

i,
em {
  font-style: normal;
}