.container {
    margin: 0 auto;
    font-size: 28px;
    border: 1px solid red;
    color: red;
    padding-left: 20px;
}
.container:after
 {
    content: ' ';
    width: 30px;
    height: 31px;
    line-height: 30px; /*  px */
    border: 1px solid blue;
}

p {
    line-height: 20px;/*px*/
    border-right: 2px solid green;
}
.article {
    font-size: 28px; display: block;margin-bottom: 14px;
}