```html

```css

display: block;

margin: 10px;

padding: 10px;

text-decoration: none;

color: #333;

font-size: 16px;

text-align: center;

border: none;

border-bottom: 2px solid #ccc;

cursor: pointer;

a:hover {

background-color: #ddd;

a:active {

background-color: #888;

- a:visited {

color: #333;

font-size: 16px;

- a:hover {

background-color: #ddd;

- a:active {

background-color: #888;

- a:link {

color: #4CAF50;

font-size: 16px;

3. 總結