title >
.container{
height: 100px;
background: pink;
}
.container > .row{
height: 50px;
background: green;
}
.container > .row > div{
height: 25px;
border: 1px solid #ccc;
}
src="https://www.it610.com/lib/jquery/jquery.min.js">src="https://www.it610.com/lib/bootstrap/js/bootstrap.min.js">
