前端入门到熟悉day11

JDM
.jd_header{
width: 100%;
position: fixed;
height: 40px;
top: 0;
left: 0;
z-index: 10000;
input,textarea{
border: 0;
outline: none;
resize: none;
/* ios input自带的样式 清除 */
-webkit-appearance: none;
}
.clearfix::after,
.clearfix::before{
clear: both;
content: “”;
visibility: hidden;
display: block;
height: 0;
line-height: 0;
}
[class^=“icon_”]{
background: url("…/images/sprites.png") no-repeat;
background-size: 200px 200px;
}