html,
body,
header,
section,
footer,
div,
ul,
ol,
li,
img,
a,
span,
em,
del,
legend,
center,
strong,
var,
fieldset,
form,
label,
dl,
dt,
dd,
cite,
input,
hr,
time,
mark,
code,
figcaption,
figure,
textarea,
h1,
h2,
h3,
h4,
h5,
h6,
p,
hgroup {
  margin: 0;
  padding: 0;
}
html,
body {
  width: 100%;
  height: 100%;
  line-height: 1.8;
  font-size: 16px;
  background-color: #fefaef;
  color: #000;
  font-family: Helvetica, Tahoma, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -moz-osx-font-smoothing: grayscale /*优化文字显示*/;
  -webkit-font-smoothing: antialiased;
  -webkit-overflow-scrolling: touch; /*流畅滚动*/
}
*,
*:before,
*:after {
  box-sizing: border-box;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
a,
button,
input,
optgroup,
select,
textarea {
  -webkit-tap-highlight-color: rgba(0,0,0,0);
}
fieldset,
img {
  border: 0;
  vertical-align: top;
}
img {
  display: block;
  width: 100%;
}
address,
caption,
cite,
code,
dfn,
em,
strong,
th,
var {
  font-style: normal;
  font-weight: normal;
}
ol,
ul {
  list-style: none;
}
b,
i,
h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: 100%;
  font-weight: normal;
  font-style: normal;
}
a,
aactive,
ahover,
avisited {
  text-decoration: none;
  outline: none;
}
textarea,
button  {
  -webkit-appearance: none;
  appearance: none;
  border: none;
  outline: none;
  background: transparent;
}
/*清楚浮动*/
.clearfixafter {
  content: "\200b";
  display: block;
  height: 0;
  clear: both;
}
/* placeholder默认颜色 */
input::-webkit-input-placeholder {
  color: #a8a8a8;
}
/* placeholder获得焦点后颜色 */
input:focus::-webkit-input-placeholder {
  color: #999;
}