如何在 font awesome icon fa fa-circle 上创建水平居中线?

how can I create an horizontal and centered line on fontawesome icon fa fa-circle?

我想在菜单上方居中水平悬停 bar/border。 (我已经尝试过 text-align: center 和 align-content)。我该怎么做?

这是我的代码:

nav ul {
list-style-type: none;
display: flex; 
}


nav li {
margin-right: 15px; 
margin-top: 5px;
}


nav a {
font-size: 1.1em;
color: #181818; 
padding-right: 20px; 
padding-top: 30px; 
text-decoration: none;
}


nav a:hover {
color: black; 
border-top: 3px solid #3691b0;
text-align: center; 
}


nav {
position: absolute; 
right: 210px;
top: 20px;  
}

<nav>
  <ul> 
     <li><a href="#">Accueil</a></li>
     <li><a href="nos services.html">Services</a></li>
     <li><a href="nos projets.html">Portfolio</a></li>
     <li><a href="formulaire.html">Contact</a></li>
 </ul>
</nav>

感谢您的帮助

如果添加了导航 a {padding-right:20px;,则无法将它们居中; } 这会在 <a>center </a> 内创建一些白色 space 除非你让它两边都等于 padding

尝试改成margin-right:20px;

nav ul {
list-style-type: none;
display: flex; 
}


nav li {
margin-right: 15px; 
margin-top: 5px;
}


nav a {
font-size: 1.1em;
color: #181818; 
margin-right:20px; //padding-right:20px;
padding-top: 30px; 
text-decoration: none;
}


nav a:hover {
color: black; 
border-top: 3px solid #3691b0;
text-align: center; 
}


nav {
position: absolute; 
right: 110px; 
top: 50px;  
}
<nav>
  <ul> 
     <li><a href="#">Accueil</a></li>
     <li><a href="nos services.html">Services</a></li>
     <li><a href="nos projets.html">Portfolio</a></li>
     <li><a href="formulaire.html">Contact</a></li>
 </ul>
</nav>