.clear{
    clear: both;
}
#menu {
    z-index: 100;
    position: relative;
    width: 1200px;
    height: 56px;
}

#menu ul::after {
    content: "";
    visibility: hidden;
    display: block;
    clear: both;
}

#menu ul li {
    position: relative;
    display: inline;
    float: left;
    font-size: 15px;
    width: 148px;
}

#menu ul li.dg {
    width: 2px;
    height: 56px;
    float: left;
}

#menu ul li a {
    text-align: center;
    display: block;
    line-height: 56px;
    color: #fff;
    transition: all 0.3s ease-in-out 0s;
}

#menu ul li .change {
    text-decoration: none;
    color: #fff;
    background-color: #000000;
}

#menu ul li a:hover {
    text-decoration: none;
    color: #fff;
    background-color: #000000;
}

#menu ul li a.sec {
    text-decoration: none;
    color: #fff;
    background-color: #000000;
}

#menu ul li ol {
    position: absolute;
    width: 148px;
    display: none;
    color: #fff;
    margin-left: 0px;
    padding: 0px;
    left: 0px;
    background-color: #000000;

}

#menu ul li ol li {
    display: block;
    float: none;
    background-image: none;
    font-weight: normal;
    font-size: 13px;
    padding: 0px;
    padding: 0px;
    margin: 0px;
    text-align: left;
    width: 148px;
}

#menu ul li a i {
    margin-left: 8px;
}

#menu ul li ol li a {
    text-align: center;
    width: auto;
    display: block;
    overflow: hidden;
    color: #fff;
    padding-top: 6px;
    padding-bottom: 6px;
    line-height: 20px;
    border-bottom: #000000 solid 1px;
    margin: 0px;
}

#menu ul li ol li a:hover {
    color: #fff;
    background-color: #000000;
    background-image: none;
    border-bottom: #000000 solid 1px;

}

.clear {
    clear: both;
}
.auto_title{
    text-align: center;
    font-size: 16px;
    font-weight: bold;
}
.auto_time{
    text-align: center;
    margin: 15px 0;
}

@media screen and (max-width:768px) {
    #menu {
        width: 100%;
        min-width: 100%;
        height: auto;
    }
    video{
        width: 100% !important;
        height: auto;
    }

    #menu ul li {
        width: 25%;
        float: left;
        border-right: 1px solid #000000;
        border-bottom: 1px solid #000000;
        box-sizing: border-box;
    }

    #menu ul li:nth-of-type(4n) {
        border-right: 0;
    }

    #menu ul li a {
        line-height: 40px;
    }
    #menu ul li ol{
        display: none;
    }
}