.crumbs b{
margin: 0 .05rem;}
.zhineng .item:nth-of-type(3n) {
       margin-right: 2%;}
.zhineng .item:nth-of-type(4n) {
       margin-right: 0;}
.zhineng .item{
    width: 23%;
    margin-right: 2%;}
@media (max-width: 767px) {
    .zhineng .item {
        width: 47%;
        margin-right: 6%;}


    .zhineng .item:nth-of-type(3n) {
        margin-right: 6%;}
        .zhineng .item:nth-child(even) {
        margin-right: 0;}
}
.footer .copyright a{
    display: inline;
    color: #fff;}
.footer .copyright img{
display: inline;}