[英]Applying a transparent overlay through CSS
This section of my website has an image for the background.我网站的这一部分有一张背景图片。 I am trying to create a transparent overlay at the top of this section as highlighted below in red.
我正在尝试在此部分的顶部创建一个透明覆盖,如下面以红色突出显示。 I am trying to do this through CSS and not actually applying the transparent overlay on the actual image itself.
我试图通过 CSS 来做到这一点,而不是在实际图像本身上实际应用透明叠加层。 I made it red so it's easier to see, but the actual color will be the same as the two boxes below.
我把它变成了红色,这样更容易看清,但实际颜色将与下面的两个框相同。 How can I create a transparent overlay that only covers a certain portion of the iamge?
如何创建仅覆盖图像特定部分的透明叠加层?
<!-- Contact -->
<div id="contact">
<div class="container">
<h1><strong>Contact Summit</strong></h1>
<hr>
<div class="row">
<div class="col-md-6">
<div class="con-padded">
<form name="contactform" method="post" action="index.php" class="form-vertical" role="form">
<div class="form-group">
<label for="inputName" class="control-label">Name</label>
<input type="text" class="form-control input-md" id="inputName" name="inputName" placeholder="Name">
</div>
<div class="form-group">
<label for="inputEmail1" class="control-label">Email</label>
<input type="text" class="form-control input-md" id="inputEmail" name="inputEmail" placeholder="Email">
</div>
<div class="form-group">
<label for="inputSubject" class="control-label">Subject</label>
<input type="text" class="form-control input-md" id="inputSubject" name="inputSubject" placeholder="Subject">
</div>
</div>
</div> <!-- end col-md-6 -->
<div class="col-md-6">
<div class="con-padded">
<div class="form-group">
<label for="inputPassword1" class="control-label">Details</label>
<textarea class="form-control" rows="5" id="inputMessage" name="inputMessage" placeholder="Message..."></textarea>
</div>
<div class="form-group">
<button type="submit" class="btn btn-default pull-right">
Send
</button>
</div>
</form>
</div>
</div> <!-- end col-md-6 -->
</div> <!-- end row -->
</div> <!-- end container -->
</div> <!-- end contact -->
/*==================
CONTACT
===================*/
#contact{
background: url('../img/summit.jpg') no-repeat center center fixed;
background-size: 100% auto;
color: #FCFFF5; /*white*/
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
padding-top: 30px;
}
#contact h1 {
color: #FCFFF5; /*white*/
text-align: center;
}
#contact .col-md-6 {
padding-left: 10px;
padding-right: 10px;
padding-bottom: 20px;
margin: 0 auto;
}
.con-padded {
background-color: #282828; /*black*/
padding-top: 30px;
padding-bottom: 40px;
padding-left: 25px;
padding-right: 25px;
opacity: 0.93;
-webkit-opacity: 0.93;
-moz-opacity: 0.93;
height: 310px;
}
One suggestion would be to add/update your CSS like this一个建议是像这样添加/更新你的 CSS
#contact {
background: url('../img/summit.jpg') no-repeat center center fixed;
background-size: 100% auto;
color: #FCFFF5; /*white*/
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
padding-top: 30px;
position: relative;
}
#contact:before {
content: ' ';
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 110px;
background-color: rgba(255,0,0,0.4);
}
#contact h1 {
color: #FCFFF5; /*white*/
text-align: center;
position: relative;
}
Code sample代码示例
#contact { background: url('http://lorempixel.com/600/300/nature/8/') no-repeat center center fixed; background-size: 100% auto; color: #FCFFF5; /*white*/ -webkit-background-size: cover; -moz-background-size: cover; -o-background-size: cover; background-size: cover; padding-top: 30px; position: relative; } #contact:before { content: ' '; position: absolute; left: 0; top: 0; width: 100%; height: 110px; background-color: rgba(255,0,0,0.4); } #contact h1 { color: #FCFFF5; /*white*/ text-align: center; position: relative; } #contact .col-md-6 { padding-left: 10px; padding-right: 10px; padding-bottom: 20px; margin: 0 auto; } .con-padded { background-color: #282828; /*black*/ padding-top: 30px; padding-bottom: 40px; padding-left: 25px; padding-right: 25px; opacity: 0.93; -webkit-opacity: 0.93; -moz-opacity: 0.93; height: 310px; }
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/> <!-- Contact --> <div id="contact"> <div class="container"> <h1><strong>Contact Summit</strong></h1> <hr> <div class="row"> <div class="col-md-6"> <div class="con-padded"> <form name="contactform" method="post" action="index.php" class="form-vertical" role="form"> <div class="form-group"> <label for="inputName" class="control-label">Name</label> <input type="text" class="form-control input-md" id="inputName" name="inputName" placeholder="Name"> </div> <div class="form-group"> <label for="inputEmail1" class="control-label">Email</label> <input type="text" class="form-control input-md" id="inputEmail" name="inputEmail" placeholder="Email"> </div> <div class="form-group"> <label for="inputSubject" class="control-label">Subject</label> <input type="text" class="form-control input-md" id="inputSubject" name="inputSubject" placeholder="Subject"> </div> </div> </div> <!-- end col-md-6 --> <div class="col-md-6"> <div class="con-padded"> <div class="form-group"> <label for="inputPassword1" class="control-label">Details</label> <textarea class="form-control" rows="5" id="inputMessage" name="inputMessage" placeholder="Message..."></textarea> </div> <div class="form-group"> <button type="submit" class="btn btn-default pull-right"> Send </button> </div> </form> </div> </div> <!-- end col-md-6 --> </div> <!-- end row --> </div> <!-- end container --> </div> <!-- end contact -->
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