我想知道为什么我的滚动平滑是不工作的。我不太清楚为什么？我以为添加溢出-y：scroll；scroll-behavior：smooth；会有帮助，但不起作用。下面是我的代码：

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#container{
    overflow-y: scroll;
    scroll-behavior: smooth;
}
.topTab{
bottom: 0;
position: fixed;
font-size: 25px;
color: white;
}
.pg{
  font-size: 100px;
  height: 100vh;
  background-color: blue;
  text-align: center;
}

a{
 color: white;
}

<div class = "topTab">
  <li><a href="#1">1</a></li>
  <li><a href="#2">2</a></li>
  <li><a href="#3">3</a></li>
</div>

<div id = "container">
<div id = "1" class= "pg">1</div>
<div id = "2" class = "pg">2</div>
<div id = "3" class = "pg">3</div>
</div>

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