.checkbox-drop {
    width: 40px;
    height: 25px;
    position: relative;
    outline: none;
}
.checkbox-icon {
    width: 100%;
    height: 100%;
    font-size: 18px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
}
.el-checkbox-nowrap .el-checkbox {
    width: 100%;
    margin-right: 0;
}