<div class="shadow-lg p-3 mb-5 bg-body rounded container">

<div class="container">
<div class="row">

<div class="col-8">
<!-------------左边内容开始---------------->
<div class="shadow-lg p-3 mb-5 bg-body rounded container">
左边60%区域
</div>
<!-------------左边内容结束---------------->
</div>
	
<!------------------------------------------------------------------------------------------------------------->
	
<div class="col-4">
<!-------------右边内容开始---------------->
<div class="shadow-lg p-3 mb-5 bg-body rounded container">
右边40%区域
</div>
<!-------------右边内容结束---------------->
</div>
</div>
</div>

</div>