CSS：访问过的选择器没有做任何改变？

Question

a:visited选择器根本没有改变。关于订购LVHA，我读过很多地方甚至是stackoverflow解决方案（link＆gt; VISITED＆gt; HOVER＆gt; ACTIVE）。另外我读了一些现代浏览器不允许：出于安全目的访问，但我不确定。我的下面的代码不起作用：（

.anchor-list li a {
  color: orange;
}
.anchor-list li a:link {
  text-decoration: none;
  color: red;
}
.anchor-list li a:visited {
  text-decoration: underline;
  color: green;
}
.anchor-list li a:hover {
  text-decoration: underline;
  color: yellow;
}
.anchor-list li a:active {
  text-decoration: underline;
  color: blue;
}

<ul class="anchor-list">
  <li><a href="http://google.com">All games</a>
  </li>
  <li><a href="index.html">Online action games</a>
  </li>
  <li><a href="http://google.com">Two players game</a>
  </li>
  <li><a href="http://google.com">Most popular games</a>
  </li>
  <li><a href="http://google.com">Educational games</a>
  </li>
</ul>