html,
body {
  height: 100%;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;/*chrome、safari*/
  -moz-osx-font-smoothing: grayscale;/*firefox*/
}
/* 重置各标签的默认样式 */
a,
body,
button,
center,
cite,
code,
dd,
del,
div,
dl,
dt,
em,
fieldset,
figcaption,
figure,
footer,
form,
h1,
h2,
h3,
h4,
h5,
h6,
header,
hr,
html,
img,
input,
label,
legend,
li,
mark,
ol,
p,
section,
span,
textarea,
time,
td,
th,
ul {
  margin: 0;
  border: 0;
  padding: 0;
  font-style: normal;
  box-sizing: border-box;
  /*  自动换行 */
  word-wrap: break-word;
  /*  强制英文单词断行 */
  word-break: break-all;
}
 
/* 去除input标签的默认样式 */
button,
input,
textarea {
  -webkit-appearance: none;
  outline: none;
  background-color: transparent;
}
 
/* 去掉按下的阴影盒子 */
input,
textarea,
a {
  -webkit-tap-highlight-color: transparent;
}
/*  清除a标签下划线 */
a,
a:visited {
  text-decoration: none;
}
a:focus,
a:active,
a:hover {
  outline: none;
}
 
/*  清除列表前面的点 */
ol,
li,
ul {
  list-style: none;
}
 
/*  清除IE下图片的边框 */
img {
  border-style: none;
  font-size: 0;
}
/* 清除浮动 */
.clearfix:before,
.clearfix:after {
    content: "";
    display: table;
}
.clearfix:after {
    clear: both;
}