.content {
    display: flex;
}
.main_article{
    flex-grow: 4;
}
.sub_contents{
    flex-grow: 2;
    flex-basis: 150px;
    flex-shrink: 0;
    margin: 50px 25px 25px 10px;
    background-color: rgba(247,247,247,97);
    border-radius: 10px;
    padding: 10px 8px 30px 8px;

}
.split_with_up_and_down{
    border-bottom: 2px solid rgba(223,223,223,87.5);
    margin: 10px 3px 10px 3px;
    
}
.sub_contents .sticky{
    position: sticky;
    top: 0;
}
.return_top{
    position: relative;
    top:400px;
}
.right{
    margin-top: 10px !important;
}