ul,li{
    margin:0;
    padding:0
}
ul {
    list-style: none
}
.top-menu-item{
    font-size: 14px;
}
.top-menu-item:hover{
    background-color: #4997f9;
}
.menu-item:hover{
    background-color: #4997f9;
}
.menu-nav-first{
    display: none;
    position: absolute;
    top: 0;
    left: 100%;
    width: 220px;
    background-color: #4997f9;
}
.menu-nav-first-upward{
    display: none;
    position: absolute;
    bottom: 0;
    left: 100%;
    width: 220px;
    background-color: #4997f9;
}
.menu-nav-first-overflow{
    position: fixed;
    left: 220px;
    width: 220px;
}

.top-menu-item:hover .menu-nav-first,
.top-menu-item:hover .menu-nav-first-upward{
    display: block;
}
.menu-nav-first > ul > li,
.menu-nav-first-upward > ul > li,
.menu-nav-first > ul > a > li,
.menu-nav-first-upward > ul > a > li{
    position: relative;
    display: block;
    color: #fff;
    height: 45px;
    padding: 0 20px;
    background-color: #4997f9;
    user-select: none;
}
.menu-nav-first > ul > li:hover,
.menu-nav-first-upward > ul > li:hover,
.menu-nav-first > ul > a > li:hover,
.menu-nav-first-upward > ul > a > li:hover{
    background-color: #2D6FC3;
}
.menu-nav-first .menu-nav-second{
    display: none;
    position: absolute;
    top: 0;
    left: 100%;
    width: 220px;
    background-color: #2D6FC3;
}
.menu-nav-first-upward .menu-nav-second{
    display: none;
    position: absolute;
    bottom: 0;
    left: 100%;
    width: 220px;
    background-color: #2D6FC3;
}
.menu-nav-first > ul > li:hover .menu-nav-second,
.menu-nav-first-upward > ul > li:hover .menu-nav-second{
    display: block;
}
.menu-nav-second > ul > a > li{
    display: block;
    color: #fff;
    height: 45px;
    padding: 0 20px;
}
.menu-nav-second > ul > a > li:hover{
    background-color: #4997f9;
}
.menu-nav-second-overflow{
    position: fixed !important;
    left: 440px !important;
}
.text-tips{
    color: #f6f6f6;
    font-size: 11px;
}

.jiantou{
    position: absolute;
    right: 15px;
    line-height:45px !important;
}