* {
  box-sizing: border-box;
}
html {
  width: 100%;
  height: 100%;
  
}
body {
  width: 100%;
  margin: 0;
  font-family: "微软雅黑", "黑体", "宋体";
}

/*语义化标签*/

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

li {
  list-style: none;
}

/* correct font weight in Chrome, Edge, and Safari. */
b,
strong {
  font-weight: bolder;
}
/*
   * IE 10 激活转态有背景色
   * 去掉默认的下划线
   */
a {
  text-decoration: none;
  background-color: transparent;
  color: #000;
}
/* IE 10 下img有border */
img {
  border-style: none;
}
table {
  border-collapse: collapse;
  table-layout: fixed;
}

/* form 表单元素 */
input {
  margin: 0;
  padding: 0;
  outline: none;
}
input::-webkit-input-placeholder {
  color: #ccc;
}
input::-ms-input-placeholder {
  color: #ccc;
}
input::-moz-placeholder {
  color: #ccc;
}
input[type="submit"],
input[type="button"] {
  cursor: pointer;
}
button[disabled],
input[disabled] {
  cursor: default;
}
button {
  outline: none;
  border: none;
  background-color: transparent;
}

/*浮动相关*/
.fl {
  float: left !important;
}
.fr {
  float: right !important;
}
.fn {
  float: none !important;
}
.clearfix::after {
  display: block;
  clear: both;
  content: "";
}