“`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. 总结