* {
  margin: 0;
  padding: 0;
}
body {
  user-select: none;
  background-color: #f3f3f3;
}
a {
  text-decoration: none;
  color: #333;
}
ul {
  list-style: none;
}

.main{
  width: 1524px;
  margin: 0 auto;
}