*{
    margin: 0;
    padding: 0;
    text-decoration: none;
    list-style: none;
}
.menu-a{
    width: 50px;
    height: 50px;
    margin: auto;
    position: relative;
}
.menu-span{
    width: 30px;
    margin: auto;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}
.menu-span span:nth-child(1){
    width: 25px;
    height: 1px;
    background-color: #000;
    display: block;
    transition: .3s ease-in;
    /* float: right; 如果需要靠右，就右浮动 */
}
.menu-span span:nth-child(2){
    width: 30px;
    height: 1px;
    background-color: #000;
    margin-top: 5px;
    display: block;
    transition: .3s ease-in;
    /* float: right; 如果需要靠右，就右浮动 */
}
.menu-span span:nth-child(3){
    width: 25px;
    height: 1px;
    background-color: #000;
    display: block;
    margin-top: 5px;
    transition: .3s ease-in;
    /* float: right; 如果需要靠右，就右浮动 */
}
.menu-span.active span:nth-child(1){
    transform: rotate(45deg) translateX(5px) translateY(5px);
}
.menu-span.active span:nth-child(2){
    opacity: 0;
}
.menu-span.active span:nth-child(3){
    transform: rotate(-45deg) translateX(3px) translateY(-4px);
}
.menu-all{
    position: fixed;
    top: 50px;
    left: 0;
    width: 100%;
    background-color: bisque;
    height: auto;
    /* display: none; */
}
.menu-all.actives{
    display: block;
}
.menu-cont{}
.menu-cont .xiala{
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: center;
}
.menu-cont .xiala a{
    font-size: 18px;
    color: blueviolet;
    display: block;
    padding: 10px 0;
    padding-left: 5%;
}
.menu-cont .xiala span{
    display: block;
    cursor: pointer;
    margin-left: 10px;
}
.menu-cont .xiala span .xuan{
    transform: rotate(180deg);
}
.menu-cont .xiala span i{
    display: block;
    font-size: 20px;
    transition: .3s ease-in;
}
.menu-cont a{
    font-size: 18px;
    color: blueviolet;
    display: block;
    padding: 10px 0;
    padding-left: 5%;
}
.xiala-all{
    display: none;
}
.xiala-all.active{
    display: block;
}
.xiala-all a{
    font-size: 16px;
    color: aqua;
}
/* 下拉二级分类 */
.menu-cont .xiala1{
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: center;
}
.menu-cont .xiala1 a{
    font-size: 18px;
    color: blueviolet;
    display: block;
    padding: 10px 0;
    padding-left: 5%;
}
.menu-cont .xiala1 span{
    display: block;
    cursor: pointer;
    margin-left: 10px;
}
.menu-cont .xiala1 span .xuan{
    transform: rotate(180deg);
}
.menu-cont .xiala1 span i{
    display: block;
    font-size: 20px;
    transition: .3s ease-in;
}
.xiala1-all{
    display: none;
}
.xiala1-all.active{
    display: block;
}
.xiala1-all a{
    font-size: 16px;
    color: aqua;
}