自定义滚动条

/**滚动条样式**/
::-webkit-scrollbar {
    width: 30px;
    height: 4px;
}

::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background: url(./images/lion.png) no-repeat top;
    background-size: 0.55rem 0.4rem;
}

::-webkit-scrollbar-track {
 	background: url(./images/y.png) no-repeat top;
 	background-size: 0.041rem auto;
}