移动端网页适配异常：右侧出现空白区域求助

• PC端网页显示完全正常，但移动端无法适配屏幕，右侧出现空白区域，且无任何内容超出窗口范围
• 部分设置下还会出现头部无法适配的情况

问题截图 #

• 右侧空白区域：
• 头部不适配及空白：

HTML页面代码 #

<!DOCTYPE html>

<html>
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>@ViewBag.Title</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Outfit:wght@100..900&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="~/styles/header.css">
    <link rel="stylesheet" href="~/styles/footer.css">
    <link rel="stylesheet" href="~/styles/general_index.css">
    <link rel="stylesheet" href="~/styles/index_page.css">
</head>
 <body>
    <div class="background-container">
    </div>
 </body>
</html>

general_index.css代码 #

body {
    margin: 0;
    padding: 0;
    position: relative;
    background-color: #FDF1E6;
    font-family: Outfit, Arial, Helvetica, sans-serif;
    font-style: normal;
    color: #FFFFFF;
    width: 100%; /* take full browser width */
    height: 100%;
}

.background-container {
    background-image: url("../background.jpg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;

    display: flex;
    flex-direction: column;
    position: relative;
    padding-bottom: 650px;
}



body::before {
  content: "";
  position: absolute;
  top: 0px;
  right: 0px;
  bottom: 0px;
  left: 0px;
  background-color: rgba(0,0,0,0.0);
  z-index: -1;
}

内容的提问来源于stack exchange，提问作者HarryTra