javascript - 所选文字在640像素或更小的视口(viewport)中逐渐消失

我有一个页面，如果您单击我的代码段中显示的框之一，则会显示一个选中标记，并且将鼠标移开后，其中的内容就好像处于活动状态。但是，当使用640像素或更小的视口查看时，选择并选择其他内容后，框内的文本会淡出。它不是在普通的桌面视图中执行此操作，那么为什么要使用特定的媒体查询来执行此操作？我完全没有对媒体查询中的.box-focused css进行任何更改，甚至也没有包含它，因为我希望所有内容都一样。

是否有人看到导致这种情况发生的原因？

$('.project-option-boxes').click(function() {
  $(this).hide().toggleClass('box_focused').fadeIn('slow');
});

#project-scope-container {
	margin-top: 70px;
	margin-left: 9%;
	width: 75%;
	height: 300px;
}
.project-option-boxes {
	display: inline-block;
	border: 1px solid #45ba95;
	padding: 20px 0px;
	margin: 12px 20px 12px 0px;
	width: 30%;
	text-align: center;
	font-size: 1.2em;
	color: #45ba95;
	cursor: pointer;
  transition: ease-in-out .5s;
}
.project-option-boxes:hover {
	background-color: #45ba95;
	color: #FFF;
  transition: ease-in-out .5s;
}
.box_focused {
  background-color: #45ba95;
  color: #FFF;
  background-image : url("http://optimumwebdesigns.com/icons/white_checkmark.png");
  background-position: left center;
  background-repeat: no-repeat;
  background-size: 20px 20px;
  background-position: 5% 50%;
}
@media screen and (max-width:640px) {
  .project-option-boxes {
	display: block;
	border: 1px solid #45ba95;
	padding: 20px 0px;
	margin: 15px 0px 15px 0px;
	width: 85%;
	text-align: center;
	font-size: 1.2em;
	color: #45ba95;
	cursor: pointer;
}
.project-option-boxes:hover {
	background-color: #45ba95;
	color: #FFF;
}

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="project-scope-container">
		<div id="project-scope-title">PROJECT SCOPE</div>
		<div class="project-option-boxes">BRANDING & IDENTITY</div>
		<div class="project-option-boxes">WEB DESIGN</div>
		<div class="project-option-boxes">RESPONSIVE/MOBILE</div>
		<div class="project-option-boxes">MARKETING ASSETS</div>
		<div class="project-option-boxes">HTML5 ANIMATION</div>
		<div class="project-option-boxes">SEO OPTIMIZATION</div>
		<div class="project-option-boxes">MONTHLY SUPPORT</div>
		<div class="project-option-boxes">WEB DEVELOPMENT</div>
		<div class="project-option-boxes">ECOMMERCE</div>
	</div>

最佳答案

您没有为媒体查询中的聚焦样式正确设置颜色。请参阅下面我在媒体查询中添加的box_focused类。

$('.project-option-boxes').click(function() {
    $(this).hide().toggleClass('box_focused').fadeIn('slow');
});

#project-scope-container {
    margin-top: 70px;
    margin-left: 9%;
    width: 75%;
    height: 300px;
}

.project-option-boxes {
    display: inline-block;
    border: 1px solid #45ba95;
    padding: 20px 0px;
    margin: 12px 20px 12px 0px;
    width: 30%;
    text-align: center;
    font-size: 1.2em;
    color: #45ba95;
    cursor: pointer;
    transition: ease-in-out .5s;
}

.project-option-boxes:hover {
    background-color: #45ba95;
    color: #FFF;
    transition: ease-in-out .5s;
}

.box_focused {
    background-color: #45ba95;
    color: #FFF;
    background-image : url("http://optimumwebdesigns.com/icons/white_checkmark.png");
    background-position: left center;
    background-repeat: no-repeat;
    background-size: 20px 20px;
    background-position: 5% 50%;
}

@media screen and (max-width:640px) {
    .project-option-boxes {
        display: block;
        border: 1px solid #45ba95;
        padding: 20px 0px;
        margin: 15px 0px 15px 0px;
        width: 85%;
        text-align: center;
        font-size: 1.2em;
        color: #45ba95;
        cursor: pointer;
    }

    .project-option-boxes:hover, .box_focused {
        background-color: #45ba95;
        color: #FFF;
    }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="project-scope-container">
    <div id="project-scope-title">PROJECT SCOPE</div>
    <div class="project-option-boxes">BRANDING & IDENTITY</div>
    <div class="project-option-boxes">WEB DESIGN</div>
    <div class="project-option-boxes">RESPONSIVE/MOBILE</div>
    <div class="project-option-boxes">MARKETING ASSETS</div>
    <div class="project-option-boxes">HTML5 ANIMATION</div>
    <div class="project-option-boxes">SEO OPTIMIZATION</div>
    <div class="project-option-boxes">MONTHLY SUPPORT</div>
    <div class="project-option-boxes">WEB DEVELOPMENT</div>
    <div class="project-option-boxes">ECOMMERCE</div>
</div>