.wrap-about{background: #ffffff url(../images/bg_about.png) no-repeat bottom right;}
.wrap-why{background: url(../images/bg_why.jpg) no-repeat top center; background-size: cover;}
.wrap-quytrinh .content{background: #005AD8 url(../images/bg_qt.png) no-repeat top center; background-size: cover;}
.footer-article{background: #005AD8 url(../images/bg_footer.png) no-repeat top center; background-size: cover;}