默认入口代码

<div style="
    position: fixed;
    right: 0px;
    top: 70%;
    z-index: 10;
    writing-mode: vertical-rl; 
    letter-spacing: 4px;
    background-color: #ff7f58;
    padding: 10px;
    text-align: center;
    color:#ffffff;
    text-decoration: none;
    border-radius: 10px 0px 0px 10px;
">
    <a style="  color: inherit;" href="/main.php?act=AppView&id=Goodsdisplay&path=index"
    target="_blank">商品更新通知</a>
</div>

前台效果

后台