在背景图像顶部有一个透明框/覆盖层
我希望将灯箱放在背景图像的顶部，以便可以通过灯箱看到背景图像。我试图进入图片（顶部）而不是在它之外，但到目前为止没有任何效果。
我想把这个标题和这些文字放在白框中，背景图像看到槽（不透明度大约为 0.5）。
<h2 style="color: black" align="center">Food is essential part of our well-being</h2> <p>Our expertise </p>
这是引导程序/HTML。
<!doctype html>
<html>
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<link rel="stylesheet" href="style.css">
<title>Hello, world!</title>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="instagram" href="#">
<img src="https://cdn3.iconfinder.com/data/icons/picons-social/57/38-instagram-256.png" width="35" height="35" alt=""></a>
<a class="facebook" href="#">
<img src="https://cdn3.iconfinder.com/data/icons/wpzoom-developer-icon-set/500/01-256.png" width="35" height="35" alt=""></a>
<a class="twitter" href="#">
<img src="https://cdn2.iconfinder.com/data/icons/font-awesome/1792/twitter-square-256.png" width="35" height="35" alt=""></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
杨__羊羊2回答
-
慕运维8079593
您可以使用display: flexon.container将元素放置.container在顶部。我添加了一些注释来最小化您的代码。一探究竟！.container { background-image: url("https://cdn.pixabay.com/photo/2015/08/25/03/51/toner-906142__480.jpg"); /* Add the background image like this */ height: 500px; /* Give the background image the correct height */ background-repeat: no-repeat; background-position: center; background-size: cover; display: flex; /* Places content inside on top */ justify-content: center; /* Center horizontally */ align-items: center; /* Center vertically */}.transbox { padding: 30px; background-color: rgba(255, 255, 255, 0.5); /* Opacity can be given to background with rgba*/ border: 1px solid black; height: 100px;}<div class="container" href="service"> <div class="transbox"> <h2> Food is essential part of our well-being </h2> <p>Our expertise </p> </div></div> -
泛舟湖上清波郎朗
只需将此 CSS 添加到您的.transbox样式中即可https://jsfiddle.net/rjaw5nvx/position: absolute; top: 50%; transform: translateY(-50%);您还可以使用 Flexbox 使框垂直和水平居中，但这有点复杂。
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