.flex {
display: flex;
display: -ms-flexbox;
-ms-flex-flow: row wrap;
flex-flow: row wrap;
width: 100%;
}
 
hr.tab-r-line {
position: relative;
top: calc(50% - 2px);
margin: 0 10px;
border: none;
border-top: dotted 2px #f1f1f1;
}

hr.tab-r-line2 {
position: relative;
top: calc(50% - 1px);
margin: 0 10px;
border: none;
border-top: solid #f1f1f1;
}
 
.tab-reader-box2 {
flex: auto;
}