color: black;

text-align: center;

font-size: 16px;

padding: 10px;

background-color: #f2f2f2;

border-radius: 5px;

border: none;

cursor: pointer;

2. 通過偽類樣式

font-size: 16px;

text-align: center;

.nav li a {

color: black;

text-decoration: none;

padding: 10px;

background-color: #f2f2f2;

border-radius: 5px;

border: none;