.function .list li:nth-of-type(1) .icon {
    background-position: 0% 0;
}
.function .list li:nth-of-type(2) .icon {
    background-position: 33% 0;
}
.function .list li:nth-of-type(3) .icon {
    background-position: 66% 0;
}
.function .list li:nth-of-type(4) .icon {
    background-position: 100% 0;
}
.function .list li:nth-of-type(5) .icon {
    background-position: 0 100%;
}
.function .list li:nth-of-type(6) .icon {
    background-position: 33% 100%;
}
.function .list li:nth-of-type(7) .icon {
    background-position: 66% 100%;
}
.function .list li:nth-of-type(8) .icon {
    background-position: 100% 100%;
}
.function .list li .pictrue {
    background-image: url(../image/function.png)!important;
}