.column{
    height: 1rem;
    border2: red solid 1px;
    position: fixed;
    bottom: 0;
    right: 0;
    width: 100%;
    background-color: #fafafa;
}
.column_c{
    height: 0.5rem;
    border2: green solid 1px;
    margin-top: 0.2rem;
    background-color: #fafafa;
}
.column_index{
    width: 25%;
    height: 0.6rem;
    border2: green solid 1px;
    cursor: pointer;
    text-align: center  ;
    background-color: #fafafa;
}
.column_content{
    margin: 0 auto;
    background-color: #fafafa;
    cursor: pointer;

}

.column_content a{
    text-decoration: none;
}

.column img{
    height: 70%;
}

.column_number{
    text-align: center;
    font-size: 0.2rem;
    line-height: 0.22rem;
    letter-spacing: 0rem;
    color: rgb(102,102,102);
    background-color: #fafafa;
    margin-top: 0.1rem;
}

.column-child{
    position: absolute;
    background-color: black;
    top: -0.89rem;
    left: 3.89rem;
    display: none;
}
.column-child button{
    background-color: black;
    display: block;
    color: white;
    font-size: 0.2rem;
}