body {
    margin: 0px;
    padding: 0px;
}

.headcontent {
    width: 100%;
    background-color: #000000;
}

.headtop {
    display: flex;
    flex-direction: row;
    height: 110px;
    width: 1700px;
    margin: 0 auto;
}

.headtopleft {
    width: 40%;
    text-align: left;
}

.headtopright {
    width: 60%;
}

    .headtopright a {
        text-decoration: none;
        color: white;
    }

    .headtopleft img {
        margin-top: 34px;
        width: 139px;
        height: 42px;
    }

ul {
    display: flex;
    justify-content: center; /* 水平居中 */
    list-style-type: none;
    color: #FFFFFF;
    font-size: 16px;
    margin: 0px;
}

    ul li {
        width: 100px;
        height: 110px;
        line-height: 110px;
    }

.active {
    color: #7070D5;
}

.active::after {
    position: relative;
    content: '';
    width: 64px;
    height: 2px;
    top: -96px;
       
    background: #7070D5;
    display: inline-block;
}