You can't add random spaces in selectors. This is an error: #navbar ul li a : hover. Remove all the spaces except the actual descendant ... ... <看更多>

CSS 元件狀態重點可以分為兩部分，一個是原生的CSS 偽 ... :active 滑鼠按下的樣式; :focus 鍵盤聚焦的樣式; :hover 滑鼠滑過的樣式 ... ... <看更多>

Create hover effects in CSS - Learn HTML front-end programming. In this episode I will show how to create ... ... <看更多>