body {         width:960px;        margin: 40px auto;         }
        #menu {           height:40px;           width:100%;           background:#1b1717;           list-style:none;           border-radius:5px;         }
        #menu li {              float:left;             list-style:none;             width:130px;             }
       #menu a {  top:10px;
             padding:10px 40px 10px 40px;   
            position:relative; 
            text-transform: uppercase; 
            font: bold 12px/25px arial, helvetica;   
              }
            #menu ul {   display:none;    }            
         #menu ul li{  background:#2b2b33;
                position:relative; 
               width:130px; 
               height:40px;  
              left:-40px;   
               top:15px; 
               border-bottom:1px solid;     
            border-bottom-color:white;  
            }
         #menu li:hover > ul    {   display: block;   }
            #menu ul ul li {   position:relative;  top:-25px;   left:90px;   background:#2937a7;   }                      
   /*第一个小三角代码*/         
  #menu ul li:first-child > a:after{  content: '';    display: inline-block; border-left: 6px solid transparent;    border-right: 6px solid transparent;             border-bottom: 6px solid #ccc;   position: absolute;  top: -10px;   left: 60px;             }
           /*第二个小三角代码*/     
#menu ul ul li:first-child a:after{ 
left: -8px; 
top: 12px;  
border-left: 0px; 
border-bottom: 5px solid transparent; 
border-top: 5px solid transparent;  
border-right: 8px solid #444; }
hone      　
item11   
  hhh   hhh   hhh       
  item11
sds   
sdsd     
sds
graphic   item