.top_nav {
    width: 100%;
    height: 80px;
    border-bottom: 1px solid #ccc;
    display: flex;
    justify-content: space-between;
    background-color: white;
}

.top_nav .Logo img {
    height: 80px;
    margin-left: 220px;
}

.top_nav .menu {
    width: 400px;
    margin-right: 460px;
    text-align: center;
    display: flex;
    justify-content: space-between;
}

.top_nav .menu div {
    width: 100px;
    line-height: 80px;
    font-size: 22px;
}

.top_nav .menu div:hover {
    border-bottom: 5px solid red;
    background-color: #ccc;
}

/* 导航栏结束 */