* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  height: 4000px;
}
li {
  list-style: none;
}
a {
  text-decoration: none;
}
img {
  vertical-align: middle;
}
.w {
  width: 1303px;
  margin: 0 auto;
}