![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsICOwYTOxkTNyITNyMDM1EDMy8CX0Vmbu4GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.jpg)
類似這樣的效果
簡單版
border: 0;
outline: 0;
background: transparent;
border-bottom: 2px solid black;
width: 20px;
稍微複雜點,漂亮點的
background-color: transparent;
border: none;
border-bottom: 2px solid #fff;
outline: none;
padding-bottom: 10px;
text-align: center;
width: 400px;
font-size: 300%;
color: #fff;
font-weight: 100;