* {
    margin: 0;
    padding: 0;
}
*::after,*::before {
    box-sizing: border-box;
}
a{
    text-decoration: none;
    color: #333;
}
ul,ol,li{
    list-style: none;
}
body {
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft Yahei", "Hiragino Sans GB", "Heiti SC";
  height: 100%;
  width: 100%;
}
html{
    width: 100%;
}