CSS 優先順序 - daniel-qa/Vue GitHub Wiki
CSS 優先級順序(由高到低)
class { color: red !important; }
<div style="color: blue;">內容</div>
#myId { color: green; }
.myClass { color: yellow; }
[type="text"] { color: purple; }
:hover { color: orange; }
div { color: black; }
::before { color: gray; }