.min_width1205 {
    min-width: 1405px
}

.logo50x50 {
    height: 50px;
    width: 50px;
    margin: 10px;
    margin-right: 10px
}

.title_font_size {
    font-size: 25px
}

.menu_left {
    margin-left: 600px;
    height: 80px;
}

.menu_item {
    font-size: 15px;
    width: 80px
}

.layout_foot {
    background: #3d3d3d;
    min-width: 1405px;
    padding: 0px;
    bottom: 0px;
}

.foot_main_div {
  
    width: 1405px;
    margin: 0px auto
}

.foot_div_left {
    width: 400px;
    padding-left: 5px
}

.foot_div_middle {
    width: 400px;
    padding-left: 5px
}

.foot_div_right {
    width: 400px;
    color: white;
    text-align: left;
    font-size: 15px
}

.foot_div_bottom {
    width: 1405px;
    margin: 0px auto;
    text-align: left;
    border-top: 1px solid gray
}

.div_container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.div_left {
    flex: 0 0 auto; /* 不伸缩，固定宽度 */
}

.div_middle {
    flex: 1; /* 伸缩，占据剩余空间 */
    text-align: center; /* 文字居中 */
}

.div_right {
    flex: 0 0 auto; /* 不伸缩，固定宽度 */
}


ul {
    margin-top:15px;
    margin-left:430px;
    display: flex;
    position: absolute;
    width: 400px;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
}

li {
    position: relative;
    padding: 8px;
    font-size: 15px;
    color: #00C4E2;
    line-height: 1;
    transition: 0.2s all linear;
    cursor: pointer;
    list-style: none;
}

    li::before {
        content: "";
        position: absolute;
        top: 0;
        left: 100%;
        width: 0;
        height: 100%;
        border-bottom: 5px solid #00C4E2;
        transition: 0.2s all linear;
    }

    li:hover::before {
        width: 100%;
        top: 0;
        left: 0;
        transition-delay: 0.1s;
        border-bottom-color: #00C4E2;
        z-index: -1;
    }

    li:hover ~ li::before {
        left: 0;
    }

    li:active {
        background: #00C4E2;
        color: #00C4E2;
        
    }