.main{
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
   
}

.box{
width:500px;
margin-top:150px;
}

.title{
    height: 30px;
    background-color: white;
    background-color: rgb(161, 219, 231);
    border: 1px solid black;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
}


.content{
   padding: 5px;;
    background-color: rgb(207, 205, 205);
    display:none;
}

.sign1{
    display: none;
}

.sign2{
    display: none;
}

.active1{
    display: block;
}

.first{
    display: block;
}

.active{
    background-color: red;
}