Khung code responsive dùng bootstrap Run

Code: Html | Auth: 03cd82 
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>Tiêu đề</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
	<style type="text/css">
		/*Css tùy chỉnh*/	
		body{
			background-color: #ccc;
		}
		.container{
			background-color: #fff; max-width: 1000px; 
		}
		.k1{ min-height: 100px; background: yellow; }
		.k2{ min-height: 30px; background: green; }
		
		.k3{ min-height: 300px; background: cyan; }
		.k4{ min-height: 300px; background: #fff; }
		.k5{ min-height: 300px; background: blue; }

		.k6{ min-height: 100px; background: #eee; }

	</style>


</head>
<body>
	<div class="container">
		<div class="row">
				 
			<div  class="k1 col-12">
				<div class="row">
					K1
				</div>
			</div>	


			<div  class="k2 col-12">
				<div class="row">
					K2
				</div>
			</div>



			<div  class="k3 col-12 col-sm-3 col-md-2">
				<div class="row">
					K3
				</div>
			</div>

			<div  class="k4 col-12 col-sm-9 col-md-8">
				<div class="row">
					K4
				</div>
			</div>

			<div  class="k5 col-12 col-sm-12 col-md-2">
				<div class="row">
					K5
				</div>
			</div>


			<div  class="k6 col-12">
				<div class="row">
					K6
				</div>
			</div>
 

		</div>
	</div>



<script src="js/bootstrap.min.js"></script>
</body>
</html>