/* 以下样式不用修改 开始*/
    /* 默认ul 无需修改 */
 .nav_menustyle_1_1 ul
    {
        list-style-type:none;
        padding:0px; 
        margin:0px;}
    /* 默认li 无需修改 */
.nav_menustyle_1_1 ul li
    {
    float: left;
    width: 175px;
    height: 60px;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    line-height: 60px;}
.nav_menustyle_1_1 ul li:hover{
    background-color: #6cf;}
.nav_menustyle_1_1 ul li a {
    text-decoration: none;
    color: #FFF;}
.nav_menustyle_1_1 ul li:hover a {
    color: #000;}
.nav_menustyle_1_1 ul li ul li {
    height: 0px;
    width: 175px;
    background-color: rgba(255,255,255,0.7);
    font-size: 16px;
    line-height: 50px;
    color: #000;
    border-bottom-width: 0px;
    border-bottom-style: solid;
    border-bottom-color: #CCC;
    transition: 0.4s;
    overflow: hidden;}
.nav_menustyle_1_1 ul li:hover ul li {
    height: 50px;
    border-bottom-width: 1px;
    transition: 0.4s;}
.nav_menustyle_1_1 ul li ul li:hover {
    background-color: #09f;}
.nav_menustyle_1_1 ul li ul li:hover a{
    color: #FFF;}