Thành viên:Nguyenhai314/Nguyenhai314-1/styles.css

.khung{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
    background-color: #252839;
}
.vanban{
    position: relative;
    font-size: 45px;
    color: #252839;
}
.vanban::before{
    content: "Chào mừng bạn đến trang thảo luận của tôi!";
    white-space : nowrap;
    position: absolute;
    width: 100%;
    height: 100%;
    color: #01fe87;
    border-right: 4px solid #01fe87;
    overflow: hidden;
    animation: animate 8s linear infinite;
}
@keyframes animate{
    0%,10%,100%{
        width: 0;
    }
    70%, 90%{
        width: 100%;
    }
}
@media only screen and (min-width: 874px) and (max-width: 1224px) {
	.vanban{
		font-size: 28px;
	}
	.khung{
		height: 150px;
	}
}
@media screen and (max-width: 874px){
	.vanban{
		font-size: 18px;
	}
	.khung{
		height: 100px;
	}
}