.container {
    margin: 0 auto;
    font-size: 14px;
    border: 1px solid red;
    color: red;
    padding-left: 0.7142857142857143rem;
}
.container:after
 {
    content: ' ';
    width: 1.0714285714285714rem;
    height: 1.1071428571428572rem;
    line-height: 15px; /*  px */
    border: 1px solid blue;
}

p {
    line-height: 10px;/*px*/
    border-right: 2px solid green;
}
.article {
    font-size: 14px; display: block;margin-bottom: 0.5rem;
}