.right_nav_box {
    width: 80px;
    min-height: 200px;
    position: fixed;
    right: 2%;
    top: 30%;
    z-index: 9999;
}

.right_nav_box>li {
    cursor: pointer;
    height: 70px;
    background-color: #fff;
    border-bottom: solid 2px #e8e8e8;
    display: flex;
    justify-content: center;
    align-items: center;
}

.right_nav_box>li:nth-child(1) {
    border-top-left-radius: 15px;
}

.right_nav_box>li:nth-child(4) {
    border: none;
    border-bottom-right-radius: 15px;
}

.on {
    display: none !important;
}

.bule {
    background-color: #3E7FFF !important;
}