/*开始*/
.four-level-menu {
    background: #459df5;
    height: 40px;
}

.first-menu>li {
    float: left;
}

.first-link {
    padding: 10px 20px;
    display: block;
    background: #459df5;
    color: #fff;
    font-weight: normal;
    cursor: pointer;
}

.first-link.hover {
    background: #fff;
    color: #459df5;
}


/*二级菜单*/

.second-menu {
    margin:0;
    z-index: 100;
    position: absolute;
    background: #fff;
    padding: 15px;
    opacity: 1;
    display: none;
}

.second-menu>li {
    float: left;
    margin-right: 15px;
    margin-bottom: 10px;
}

.second-link {
    line-height:15px;
    color: #0e90d2 !important;
    font-weight:600;
    border-bottom: 1px solid #ddd;
    padding: 7px 15px;
    display: block;
    margin-bottom: 10px;
}

.second-link:hover {
    color: #459df5;
}

.third-menu>li {
    line-height:20px;
    position: relative;
}

.third-link {
    padding: 5px 15px;
    display: block;
    color: #666;
}

.third-link.hover {
    background: #f3f3f3;
    color: #459df5;
    border-radius: 4px;
}

.fourth-menu {
    width: 200px;
    position: absolute;
    background: #fff;
    border: 1px solid #ddd;
    padding: 10px 15px;
    left: 125px;
    display: none;
    top: 0px;
    z-index: 999;
    border-radius: 6px;
    box-shadow: 1px 1px 7px #ddd;
    text-align: center;
}

.fourth-menu:before,
.fourth-menu:after {
    content: "";
    display: block;
    border-width: 10px;
    position: absolute;
    top: 8px;
    left: -20px;
    border-style: solid dashed dashed;
    border-color: transparent #ddd transparent transparent;
    font-size: 0;
    line-height: 0;
}

.fourth-menu:after {
    top: 10px;
    left: -16px;
    border-width: 8px;
    border-color: transparent #fff transparent transparent;
}

.fourth-menu a {
    display: block;
    color: #666;
    padding: 4px 0px;
}

.fourth-menu a:hover {
    color: #459df5;
    text-decoration: underline;
}