小米官网的css3导航菜单

HTML代码：

<div class="nav">
      <ul>
          <li><a href="#">首页</a></li>
          <li>
              <a href="#">
                  小米手机
                  <div class="xs">
                      <div class="xiao"></div>
                      <img src="img/1.jpg" />
                  </div>
              </a>
          </li>
          <li>
              <a href="#">
                  红米
                  <div class="xs">
                      <div class="xiao"></div>
                      <img src="img/2.jpg" />
                  </div>
              </a>
          </li>
          <li><a href="#">小米平板</a></li>
          <li><a href="#">小米电视</a></li>
          <li>
              <a href="#">
                  盒子
                  <div class="xs">
                      <div class="xiao"></div>
                      <img src="img/3.jpg" />
                  </div>
              </a>
          </li>
          <li>
              <a href="#">
                  路由器
                  <div class="xs">
                      <div class="xiao"></div>
                      <img src="img/4.jpg" />
                  </div>
              </a>
          </li>
          <li><a href="#">合约机</a></li>
          <li><a href="#">服务</a></li>
          <li><a href="#">社区</a></li>
      </ul>
  </div>

css3样式：

* {
            margin: 0px;
            padding: 0px;
        }
 
        .nav {
            position: relative;
            width: 994px;
            height: 52px;
            background: #404144;
            margin: 0 auto;
        }
 
            .nav li {
                list-style: none;
                float: left;
                line-height: 50px;
            }
 
                .nav li a {
                    display: block;
                    text-decoration: none;
                    color: #FFFFFF;
                    padding: 0px 15px;
                    font-family: "微软雅黑";
                }
 
                    .nav li a:hover .xs {
                        display: block;
                    }
 
                    .nav li a:hover {
                        background: #333333;
                    }
 
                    .nav li a .xs {
                        border: 1px solid #cccccc;
                        border-top: none;
                        display: none;
                        width: 992px;
                        background: #FFFFFF;
                        position: absolute;
                        top: 50px;
                        left: 0px;
                    }
 
                        .nav li a .xs .xiao {
                            position: absolute;
                            top: -8px;
                            border-left: 8px solid transparent;
                            border-right: 8px solid transparent;
                            border-bottom: 8px solid #FFFFFF;
                            width: 0px;
                            height: 0px;
                            z-index: 999;
                        }
 
                .nav li:nth-child(1) .xiao {
                    left: 20px;
                }
 
                .nav li:nth-child(2) .xiao {
                    left: 98px;
                }
 
                .nav li:nth-child(3) .xiao {
                    left: 177px;
                }
 
                .nav li:nth-child(4) .xiao {
                    left: 255px;
                }
 
                .nav li:nth-child(5) .xiao {
                    left: 348px;
                }
 
                .nav li:nth-child(6) .xiao {
                    left: 427px;
                }
 
                .nav li:nth-child(7) .xiao {
                    left: 496px;
                }
 
                .nav li:nth-child(8) .xiao {
                    left: 576px;
                }
 
                .nav li:nth-child(9) .xiao {
                    left: 646px;
                }
 
                .nav li:nth-child(10) .xiao {
                    left: 706px;
                }

转载：http://www.w2bc.com/article/jquery-xiaomi-nav