Bootstrap 5页脚在MVC应用中与RenderBody重叠问题求助

我知道这是常见问题，但始终无法解决！近期引入Bootswatch新样式时，误重命名了bootstrap.css文件，改回后RenderBody内容仍与页脚重叠，其他功能正常，使用Bootstrap v5.1.0。已尝试移除site.css引用、使用新Bootswatch样式、为页脚添加包裹元素等方案，恳请帮助。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>@ViewData["Title"] - Suplizer</title>
   
    <link rel="stylesheet" href="~/css/site.css" asp-append-version="true" />
    <link rel="stylesheet" href="~/Suplizer.styles.css" asp-append-version="true" />

    <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
   @* <link rel="stylesheet" href="~/lib/bootstrap/dist/css/pulse.css" />*@
</head>
<body>
    <header>
        <nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
            <div class="container-fluid">
                <a class="navbar-brand" asp-area="" asp-controller="Home" asp-action="Index">Suplizer</a>
                <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
                        aria-expanded="false" aria-label="Toggle navigation">
                    <span class="navbar-toggler-icon"></span>
                </button>
                <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
                    <ul class="navbar-nav flex-grow-1">
                        <li class="nav-item">
                            <a class="nav-link text-dark" asp-area="" asp-controller="Suppliers" asp-action="Index">Suppliers</a>
                        </li>
                        <li class="nav-item">
                            <a class="nav-link text-dark" asp-area="" asp-controller="Documents" asp-action="Index">Documents</a>
                        </li>
                        <li class="nav-item">
                            <a class="nav-link text-dark" asp-area="" asp-controller="Questions" asp-action="Index">Questions</a>
                        </li>
                        @*<li class="nav-item">
                            <a class="nav-link text-dark" asp-area="" asp-controller="SupplierQuestions" asp-action="Index">Supplier Questions</a>
                        </li>*@
                    </ul>
                    <partial name="_LoginPartial" />
                </div>
            </div>
        </nav>
    </header>
    <div class="container">
        <main role="main" class="pb-3">
            @RenderBody()
        </main>
    </div>
    
    

        <footer class="border-top footer text-muted">
        <div class="container">
            &copy; 2022 - Suplizer - <a asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
        </div>
    </footer>


    <script src="~/lib/jquery/dist/jquery.min.js"></script>
    <script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
    <script src="~/js/site.js" asp-append-version="true"></script>
    @await RenderSectionAsync("Scripts", required: false)
</body>
</html>

• 调整样式加载顺序：把Bootstrap核心CSS放在自定义样式之前，防止自定义样式覆盖Bootstrap的基础布局规则。修改后的head部分：

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>@ViewData["Title"] - Suplizer</title>

    <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
    <link rel="stylesheet" href="~/css/site.css" asp-append-version="true" />
    <link rel="stylesheet" href="~/Suplizer.styles.css" asp-append-version="true" />
    @* <link rel="stylesheet" href="~/lib/bootstrap/dist/css/pulse.css" />*@
</head>

• 利用Bootstrap flex布局固定页脚：给body添加flex布局类，让主内容区自动填充剩余空间，避免内容过短时页脚上浮重叠。修改后的body结构：

<body class="d-flex flex-column min-vh-100">
    <header>
        <!-- 原导航代码保持不变 -->
    </header>
    <div class="container flex-grow-1">
        <main role="main" class="pb-3">
            @RenderBody()
        </main>
    </div>

    <footer class="border-top footer text-muted mt-auto">
        <div class="container">
            &copy; 2022 - Suplizer - <a asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
        </div>
    </footer>

    <!-- 原脚本代码保持不变 -->
</body>

• 强制清除浏览器缓存：之前的文件重命名操作可能导致浏览器缓存了旧的CSS资源，按Ctrl+Shift+R强制刷新页面，或在开发者工具中禁用缓存后刷新。

内容的提问来源于stack exchange，提问作者Pete