li{
            list-style-type: none;
        }
        #menu {
            width: 700px;
            margin: 30px auto 0px;
            height: 45px;
            background-color: #ffffff;
        }
        #menu li{
            float: left;
            width: 92px;
            line-height:39px;
            text-align: center;
            position:relative;
            border:none;
        }
        #menu li a {
            font-size:16px; color: #050505;
            display:block;
            outline:0;
            text-decoration:none; 
        }
        #menu li:hover a {
            color: #ff0000; /*导航栏文字颜色 */
        }
        #menu li:hover .dropdown_1column {
            left:0px;
            top:38px;
        }
        .dropdown_1column{ /* 下拉菜单边框颜色*/
            margin: 0px auto;
            float: left;
            position: absolute;
            left: -999em;
            text-align: left;
            border: 1px solid #066591;
            border-top: none;
            background: #F4F4F4;
            width: 140px;
        }
        #menu li:hover div a { /* 下拉菜单文字颜色*/
        font-size:12px
        ;color:rgb(12, 12, 12);
        }

        #menu li:hover div a:hover{color:#21910e;} /*下拉带单鼠标停留颜色*/

        #menu li ul {
        list-style:none;padding:10px 5px;
        margin:0;
        }
        #menu li ul li {
        font-size:12px;
        line-height:26px;
        position:relative;
        padding:0;margin:0;
        float:none;
        text-align:left;
        width:130px;
        }
        #menu li ul li:hover {
        background:none;
        border:none;padding:0;
        margin:0;
        }