<nav>
  <ul class="nav">
    <li><a href="http://www.pengfeixc.com" target="_blank">pengfeixc.com</a></li>
    <li><a href="http://www.weijuan.design" target="_blank">weijuan.design</a></li>
    <li><a href="http://mini.pengfeixc.com" target="_blank">mini.pengfeixc.com</a></li>
    <li><a href="http://www.pengfeixc.com/about" target="_blank">WangPF</a></li>
  </ul>
</nav>
body {
  padding: 50px 0;
}

.nav {
  text-transform: uppercase;
  text-align: center;
  font-weight: 600;
}

.nav * {
  box-sizing: border-box;
  transition: all 0.35s ease;
}

.nav li {
  display: inline-block;
  list-style: outside none none;
  margin: 0.5em 1em;
  padding: 0;
}

.nav a {
  padding: 0.5em 0.8em;
  position: relative;
  text-decoration: none;
  font-size: 20px;
}

.nav a::before,
.nav a::after {
  content: "";
  height: 14px;
  width: 14px;
  position: absolute;
  transition: all 0.35s ease;
  opacity: 0;
}

.nav a::before {
  content: "";
  right: 0;
  top: 0;
  border-top: 3px solid rgb(70, 69, 69);
  border-right: 3px solid black;
  transform: translate(-100%, 50%);
}

.nav a:after {
  content: "";
  left: 0;
  bottom: 0;
  border-bottom: 3px solid rgb(70, 69, 69);
  border-left: 3px solid black;
  transform: translate(100%, -50%);
}

.nav a:hover:before,
.nav a:hover:after {
  transform: translate(0, 0);
  opacity: 1;
}

.nav a:hover {
  color: black;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.