The output I got
在try 一些css属性时，我注意到margin-top在item A上不起作用.以下是我用于测试的代码:
ul {
background-color : #295580;
width : 190px;
border-radius : 6px;
}
ul>li {
background-color : #d9e8f7;
margin-top : 20px; /*/ Tried to apply margin-top on each <li> item */
}<ul>
<li>item A</li>
<li>item B</li>
<li>item C</li>
<li>item D</li>
<li>item E</li>
</ul>Actually I was trying to add margin on top of each <li> child.
So my question is why margin-top is being applied to all items(i.e. From item B to item E) except item A? Is it because of margin collapse or is there another reason behind it?
