* {
  padding: 0;
  margin: 0;
}

body {
  background-color: #ffffff;
  font: 12px / 1.5 微软雅黑, Arial, sans-serif;
}

.w {
  width: 1270px;
  margin: 0 auto;
}

li {
  list-style: none;
  text-decoration: none;
}

a {
  text-decoration: none;
  font-size: 20px;
  color: black;
}

.clearfix::after,
.clearfix::before {
  content: "";
  display: table;
}

.clearfix::after {
  clear: both;
}

.clearfix {
  zoom: 1;
}

.clearfix {
  zoom: 1;
}