<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width = device -width"/>
<title>Title</title>
<link href="../css/bootstrap.css" rel="stylesheet">
<style>
.col-6 {
width: 600px;
height: 300px;
border: solid red 1px;
}
.col-3{
width: 600px;
height:300px;
border: solid red 1px;
}
.rows-6{
height: 300px;
border: solid red 1px;
}
.col{
width: 600px;
height: 300px;
border: solid red 1px;
}
.row{
width: 600px;
border: solid red 1px;
}
</style>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-6"></div>
<div class="col-6"> <div class="row-6"></div> <div class="row-6"></div> </div>
</div>
<div class="row">
<div class="col-6"></div>
<div class="col-3"></div>
<div class="col-3"></div>
</div>
</div>
</body>
</html>
想要实现这个样式，貌似嵌套实现不出来，
