Thanks for the Fiddle. If I understand you, you want the lines to stick to the right of the space, right?
If this is the case, you resolve with the following additions to your CSS:
li {
position: relative;
}
.nav-romeu li:before {
right: 0;
}
Follow the example:
* {
margin: 0;
padding: 0;
outline: none;
text-decoration: none !important;
list-style-type: none !important;
}
li {
position: relative;
}
body {
font-family: Helvetica;
margin-bottom: 0 !important;
-webkit-font-smoothing: antialiased;
}
.header-fixed {
height: 110px;
width: 100%;
line-height: 108px;
background: #fff;
border-bottom: 3px solid rgb(142, 21, 29);
}
.header-fixed img {
display: block;
margin: 10px 0;
}
.nav-romeu {
display: flex;
width: 100%;
justify-content: center;
align-items: center;
}
.nav-romeu li a {
font-family: "Helvetica";
font-size: 18px;
text-transform: uppercase;
font-weight: bold;
color: rgb(142, 21, 29);
font-smooth: always;
display: block;
padding: 0 15px;
}
.nav-romeu li:before {
content: '';
width: 40px;
height: 2px;
background: #000;
position: absolute;
top: 70px;
right: 0;
}
<header class="header-fixed">
<div class="container">
<ul class="nav-romeu">
<li><a href="#">teste </a></li>
<li><a href="#">teste </a></li>
<li><a href="#">teste </a></li>
<li><a href="#">teste </a></li>
</ul>
</div>
</header>