footer {
    width: 100%;
}

footer>.top {
    height: 5vh;
    background-color: black;
    overflow: hidden;

}

footer>.bottom {
    overflow: hidden;
    width: 74vw;
    margin: 1vh auto;
}

footer>div img {
    height: 3vh;
}

footer>.top .title {
    line-height: 5vh;
    text-align: center;
    color: #999999;
    font-size: 0.6vw;
    width: 74vw;
    margin: 0 auto;
    overflow: hidden;
}

footer>.bottom .title {
    line-height: 3vh;
    text-align: center;
    color: rgb(152, 152, 152);
    font-size: 0.6vw;
    width: 74vw;
    margin: 0 auto;
    overflow: hidden;
}

footer>.top .title>div {
    float: left;
    margin-left: 1vw;
}

footer .tilte_bottom {
    overflow: hidden;
    display: flex;
    justify-content: center;
}

footer .tilte_bottom>div {
    margin-left: 0.5vw;
}