垂直滚动条出现在引导导航、轮播和页脚中 - Vertical scrollbar appearing in bootstrap navigation, carousel & footer

我使用Twitter Bootstrap创建了一个简单的4页网站。虽然它以前有效，但现在滚动条出现在主页的不同部分。

我在顶部菜单上有一个下拉菜单。每当单击"产品"菜单项（https://gyazo.com/8edfee3de1f27861dee5488da2b2a168）时，它都会生成一个带有滚动条的菜单，而不是显示下拉菜单。

同样，我还在导航下方创建了一个轮播，但滚动条出现在"上一个"和"下一个"按钮上

滚动条甚至出现在页脚上

在移动设备（模拟器）上查看时，不会显示图标栏。（https://gyazo.com/7f78dfc4797a135cc3083fa1f6aa8bc2）

以下是索引页的代码：

    <?php require_once "inc/functions.php"; ?>
<!DOCTYPE html>
<html lang="en">
    <head>
        <!--[if lt IE 9]>
            <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
            <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
        <![endif]-->
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>Simex</title>
        <script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
        <link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"/>
        <link rel="stylesheet" type="text/css" href="css/main.css" />
    </head>
    <body>
        <?php require "inc/navigationTop.php" ?>
        <?php require "inc/slider.php"; ?>
        <?php require "inc/homeTiles.php" ?>
        <?php require "inc/footer.php" ?>
    </body>
</html>

下面是导航部分的代码：

<?php require_once "inc/functions.php" ?>
<nav class="navbar navTop">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="index.php" target="_self">Simex</a>
    </div>
    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="navbar-collapse-1">
      <ul class="nav navbar-nav pull-right navigationList">
        <li><a href="index.php">Home</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Products <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="osmosis.php">Reverse Osmosis</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="waterTreat.php">Water Treatment</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="waterBottling.php">Water Bottling Plant</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="vehicles.php">Japanese Reconditional Vehicles</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="seeds.php">Export &amp; Sesame Seeds</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="agri.php">Agri Farming &amp; Equipment</a></li>
          </ul>
        </li>
        <li><a href="aboutUs.php">About Us</a></li>
        <li><a href="contactUs.php">Contact Us</a></li>
      </ul>
     </div><!-- /.navbar-collapse -->
  </div><!-- /.container -->
</nav>

问题出在附加的样式表上。

以前的 css 样式：

* {
.
.
overflow-x:hidden;
}

我删除了 overflow-x 属性并将其作为正文的属性放置，例如：

body {
.
.
.
overflow-x:hidden;
}