css实现下拉菜单

源码

<div class="container">
  <div class="tutorial">
    <ul>
      <li>Home</li>
      <li>Services<i class="fa fa-angle-down"></i>
        <ul>
          <li>Graphic Design</li>
          <li>Website Design</li>
          <li>Python Programming</li>
          <li>PHP Programming</li>
        </ul>
      </li>
      <li>Tutorials<i class="fa fa-angle-down"></i>
        <ul>
          <li>CSS<span>12 Available</span></li>
          <li>HTML<span>9 Available</span></li>
          <li>Jade<span>3 Available</span></li>
          <li>Javascript<span>21 Available</span></li>
          <li>Design<span>37 Available</span></li>
        </ul>
      </li>
    </ul>
    <div class="slider"></div>
    <div class="information">
      <p>A simple, clean looking dropdown menu effect achieved using pure CSS. Simple functionality, method can be extended to create a secondary dropdown block with few edits.</p>
    </div>
  </div>
</div>
<style>
	*,*:before,*:after {
	  margin: 0;
	  padding: 0;
	  box-sizing: border-box;
	}
	body,html {
	  height: 100%;
	  background-color: #eeeeee;
	}
	.container {
	  width: 100%;
	  height: 100%;
	}
	.tutorial {
	  width: 80%;
	  margin: 5% auto 0 auto;
	  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
	  background-color: #f9f9f9;
	  max-width: 800px;
	}
	.tutorial .slider {
	  width: 100%;
	  height: 300px;
	  background-color: #f03861;
	}
	.tutorial .information {
	  width: 100%;
	  padding: 20px 50px;
	  margin-bottom: 30px;
	  font-family: "Open Sans", sans-serif;
	}
	.tutorial .information h1 {
	  color: #333;
	  font-size: 1.5rem;
	  padding: 0px 10px;
	  border-left: 3px solid #f03861;
	}
	.tutorial .information h3 {
	  color: #e0e0e0;
	  font-size: 1rem;
	  font-weight: 300;
	  padding: 0px 10px;
	  border-left: 3px solid #f03861;
	}
	.tutorial .information p {
	  padding: 10px 0px;
	}
	.tutorial ul {
	  font-size: 0;
	  list-style-type: none;
	}
	.tutorial ul li {
	  font-family: "Open Sans", sans-serif;
	  font-size: 1rem;
	  font-weight: 400;
	  color: #333;
	  display: inline-block;
	  padding: 15px;
	  position: relative;
	}
	.tutorial ul li ul {
	  display: none;
	}
	.tutorial ul li:hover {
	  cursor: pointer;
	  background-color: #f2f2f2;
	}
	.tutorial ul li:hover ul {
	  display: block;
	  margin-top: 15px;
	  width: 200px;
	  left: 0;
	  position: absolute;
	}
	.tutorial ul li:hover ul li {
	  display: block;
	  background-color: #e7e7e7;
	}
	.tutorial ul li:hover ul li span {
	  float: right;
	  color: #f9f9f9;
	  background-color: #f03861;
	  padding: 2px 5px;
	  text-align: center;
	  font-size: 0.8rem;
	  border-radius: 3px;
	}
	.tutorial ul li:hover ul li:hover {
	  background-color: #e0e0e0;
	}
	.tutorial ul li:hover ul li:hover span {
	  background-color: #ee204e;
	}
</style>

链接: https://fly63.com/course/33_1582