CSS 下拉菜单

.dropbtn { background-color: #4CAF50; color: white; padding: 16px; font-size: 16px; border: none; cursor: pointer; } .dropdown { position: relative; display: inline-block; } .dropdown:hover .dropbtn { background-color:#3e8e41; } .dropdown-content { display: none; position: absolute; background-color