.mainbody{
    width: 980px;
    height: 1200px;
    margin: auto;
}
.classbox{
    display: inline-block;
    margin-top: 95px;
    width: 450px;
    background-color: 236 236 236;
    border-bottom: skyblue 6px solid;
    background-color: lightgray;
    border-radius: 5px;
    margin-left: 8px;
}
.title{
    background-color: skyblue;
    color: #fff;
    width: 450px;
    height: 80px;
    text-align: center;
    line-height: 80px;
    border-radius: 5px;
    margin-top: -25px;
}
.swbtn{
    display: inline-block;
    width: 95px;
    height: 50px;
    border-radius: 5px;
    margin: 5px 5px;
    background-color: #fff;
    line-height: 50px;
    text-align: center;
}
.classbox p{
    height: 100%;
    font-size: 20px;
    text-indent: 2em;
    line-height: 35px;
    padding: 0 10px;
    background-color: skyblue;
    border-radius: 5px;
    margin: 0 10px 10px 10px;
}