Как удалить эффект: after для определенного идентификатора, когда класс применяет эффект

nav {
  background: #FFF;
  height: 70px;
  width: 100%;
  max-width: 100%;
  box-shadow: 1px 1px #E5E5E5;
  position: fixed;
  top: 0;
  z-index: 999;
  box-sizing: border-box;
}

#nav-logo {
  float: left;
  height: 100%;
  width: auto;
  display: block;
  position: relative;
  margin-left: 5%;
}

#nav-logo img {
  height: 80%;
  width: auto;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
}

#nav-list li {
  display: inline-block;
  margin: 0 17px;
}

#nav-list li:first-child {
  margin-left: 0px;
}

#nav-list li:last-child {
  margin-right: 0px;
}

#nav-list li a {
  text-decoration: none;
  font-family: 'Muli', sans-serif;
  font-size: .9rem;
  /*color: #4b4b4b;*/
  color: #747678;
  letter-spacing: 1px;
  vertical-align: middle;
  transition: all .3s;
  -webkit-transition: all .3s;
}

#nav-list li a:after {
  content: '';
  display: block;
  width: 0;
  margin-top: 6px;
  background: #BE1E2D;
  height: 2px;
  transition: width .3s;
}

#nav-list li a:hover {
  color: #4b4b4b;
  transition: all .3s;
  -webkit-transition: all .3s;
}

#nav-list li a:hover:after {
  width: 100%;
  transition: width .3s;
}

#nav-list li a#navInverse {
  border-radius: 2px;
  box-sizing: border-box;
  font-family: 'Muli', sans-serif;
  font-size: 1.4rem;
  color: #FFF;
  background: linear-gradient(to right bottom, #BE1E2D, #981824);
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
}

#navInverse:after {
  content: '';
  display: none;
  width: 0px;
  height: 0px;
  transition: none;
}

<nav>
  <div id = "nav-logo">
    <a href = "/"><img src = "https://s3.us-east-2.amazonaws.com/mbkitsystems/logoBR.png" alt = "MB Kit Systems"></a>
  </div>
  <div id = "mobile-button"><img src = "" class = "hidden" alt = ""></div>
  <div id = "nav-pop">
    <div id = "nav-pop-close"></div>
    <ul id = "nav-list">
      <li><a href = "about">ABOUT</a></li>
      <li><a href = "services.php">SERVICES</a></li>
      <li><a href = "services">DESIGN</a></li>
      <li><a href = "contact.php">CONTACT</a></li>
      <li><a href = "contact.php" id = "navInverse">GET A QUOTE</a></li>
    </ul>
  </div>
</nav>