* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-touch-callout:none;  /*系统默认菜单被禁用*/
  -webkit-user-select:none; /*webkit浏览器*/
  -khtml-user-select:none; /*早期浏览器*/
  -moz-user-select:none;/*火狐*/
  -ms-user-select:none; /*IE10*/
  user-select:none;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
p,
blockquote,
dl,
dt,
dd,
ul,
ol,
li,
pre,
form,
fieldset,
legend,
button,
input,
textarea,
th,
td {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}