学成在线项目

2、css的基础设置

body{
background-color: #f3f5f7;
}
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
a{
text-decoration: none;
}
li{
list-style: none;
}
.clearfix::before,.clearfix::after{
content: "";
display: table;
}
.clearfix::after{
clear: both;
}
/* 版心 */
.wrapper{
width: 1200px;
margin: 0 auto;
}