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                <!-- 加载图标库 -->
<link rel="stylesheet" href="">

<div class="navbar">
  <a class="active" href="#"><i class="fa fa-fw fa-home"></i> Home</a>
  <a href="#"><i class="fa fa-fw fa-search"></i> Search</a>
  <a href="#"><i class="fa fa-fw fa-envelope"></i> Contact</a>
  <a href="#"><i class="fa fa-fw fa-user"></i> Login</a>


                body {margin: 0;font-family: Arial, Helvetica, sans-serif;}
/* 设置导航栏样式 */
.navbar {
  width: 100%;
  background-color: #555;
  overflow: auto;
/* 向左导航 */
.navbar a {
  float: left;
  padding: 12px;
  color: white;
  text-decoration: none;
  font-size: 17px;
/* 鼠标悬停导航栏链接 */
.navbar a:hover {
  background-color: #000;
/* Current/active 导航栏链接 */
.active {
  background-color: #04AA6D;
/* 添加响应性-将在小于500像素的屏幕上自动垂直显示导航栏,而不是水平显示 */
@media screen and (max-width: 500px) {
  .navbar a {
    float: none;
    display: block;