ClassContent/历届学生/吴欣阳/项目开发/练习项目/课程练习/6.1/css/public.css

.left {
    float: left;
}

.right {
    float: right;
}

.hidden {
    overflow: hidden;
}

.layout {
    width: 1200px;
    margin: 0 auto;
}
.relative {
    position: relative;
}
.absolute {
    position: absolute;
}