所以我遇到了一个问题，由于某种原因，您无法使用 Tab 键从我的 Bootstrap 导航栏中选择下拉菜单？我担心这意味着使用屏幕阅读器的人将无法浏览该网站。它似乎适用于其他引导网站，所以我不知道出了什么问题。
这是我的代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>yiskah @ spooky camp</title>
<!-- CSS -->
<link href="../css/bootstrap.css" rel="stylesheet">
<link href="../css/navbar-static-top.css" rel="stylesheet">
<link href="../css/bootstrap-accessibility.css" rel="stylesheet">
<link href="../css/default.css" rel="stylesheet">
</head>
<body>
<a href="#content" class="sr-only sr-only-focusable">Skip to main content</a>
<!-- Static navbar -->
<nav class="navbar navbar-default navbar-static-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a …