css的全局样式

*{
margin: 0; padding: 0;
box-sizing: border-box;
}
body{
width: 100%;
font-size: 12px;
font-family: microsoft yahei,"微软雅黑";
}
ul,ol,li{
list-style: none;
}
a{
text-decoration: none;
color: #666666;
}
img{
border: none;
}
.clearfix:after{
content: ".";
clear: both;
display: block;
height: 0;
visibility: hidden;
}