ClassContent/历届学生/韩一伟/项目开发/练习项目/作业/2021.06.23/public.css

.left {
    float: left;
}

.right {
    float: right;
}

.hidden {
    overflow: hidden;
}

.container {
    width: 1090px;
    margin: 0 auto;
 }

 .page_main {
    background: #f5f5f5;
}