<div>点击更新更多</div> 美化按钮

.update{
    width: 90px;
    height: 30px;
    background-color: #2a2a2a;
    border: none;
    outline: none;
    color: #ffffff;
    font-size: 18px;
    font-weight: bold;
    padding: 5px 8px;
    cursor: pointer;
}