* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
}
li {
  list-style: none;
}
a {
  text-decoration: none;
}
.w {
  width: 1300px;
  margin: 0 auto;
}
.clearfix:after {
  visibility: hidden;
  display: block;
  font-size: 0;
  content: ' ';
  clear: both;
  height: 0;
}

.clearfix {
  *zoom: 1;
}