你要重写button样式？可以啊

栗子：

button{

    border: none;

    border-radius: 0;

    width: 80%;

    margin: 0 10%;

    box-shadow: 0rpx 20rpx 30rpx 8rpx #ccc;

    background: #fff;

    -webkit-transition: all 0.1s ease-in-out 0s;

    -o-transition: all 0.1s ease-in-out 0s;

    transition: all 0.1s ease-in-out 0s;

}

button::after{

    border: none;

}

.button-hover{

    transform: translate(0px,28rpx) ;

    border: none;

    border-radius: 0;

    width: 80%;

    margin: 0 10%;

    box-shadow: 0rpx 20rpx 30rpx 8rpx #fff;

    background: #ccc;

    color: #fff

}