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

li {
  list-style: none;
}

a {
  text-decoration: none;
}

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

.w {
  width: 1360px;
  margin: 0 auto;
}

body {
  height: 100%;
}
img {
  border: 0;
}