text blurfadein + blurfadeout per css3

Hello, i could style the text in the slider so that blur-fades in, but how can i style it also to fade out? let’s say the text shows up for 10000ms. also, does animation-duration time takes 3000ms from the 10000ms, so that will remain 7000ms? what about fadeout?

.slidertext_white {
	text-decoration: none;
	color: #fff;
	font-size: 14px;
	font-weight: 400;
	animation-duration: 3s;
        animation-name: blurFadeIn;
	animation-fill-mode:forwards;
}
@keyframes blurFadeIn{
	0%{
		opacity: 0;
		text-shadow: 0px 0px 40px #fff;
		transform: scale(1.3);
	}
	100%{
		opacity: 1;
		text-shadow: 0px 0px 1px #fff;
		transform: scale(1);
	}
}

thanks