2019-06-01

css

*{

padding: 0;

auto:0;

list-style: none;

}

.bg{

width: 42px;

height: 30px;

background-image: url(image/tu.png);

background-position: -8px -338px;

}

.bg:hover{

background-position: -59px -338px;

}

.bg:active{

background-position: -127px -338px

}