* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: MicrosoftYaHei;
}

.w {
  width: 1300px;
  margin: 0 auto; 
}

li {
  list-style: none;
}

a {
  text-decoration: none;
  cursor: pointer;
}

img {
  border: 0px;
}