.el-tooltip__popper,.el-tooltip__popper.is-dark{background:rgba(0,0,0,0.6) !important;}
.el-tooltip__popper[x-placement^=top] .popper__arrow {
border-top-color: rgba(0,0,0,0.4);
}
.el-tooltip__popper[x-placement^=top] .popper__arrow:after {
border-top-color: rgba(0,0,0,0.4);
/*filter:alpha(opacity=50);
-moz-opacity:0.5;
-khtml-opacity: 0.5;
opacity: 0.5;*/
}