在相对定位的文本后面定位不透明的伪内容

Positioning opaque pseudo content behind relatively positioned text

我试图在一些文本后面放置一个不透明的黑色背景,但遇到了麻烦,因为文本总是在不透明的颜色后面。我不能使用 z-index,因为文本是相对定位的,有谁知道我怎样才能让文本出现在不透明背景之上?

JS fiddle

http://jsfiddle.net/abtuj3xj/

HTML

<section class="primary" style="background-image: url('http://lorempixel.com/output/fashion-q-c-640-480-9.jpg');" data-bgimg="http://lorempixel.com/output/fashion-q-c-640-480-9.jpg">
    <div class="item">
        <article>
            <div class="entry">
                <p>A whole bunch of text that goes on top of everything but is relatively positioned</p>
            </div>
            <div class="clear">&nbsp;</div>
        </article>
    </div> <!-- End div.item -->
    <p class="scroll-down">Scroll down</p>
</section>

CSS

section {
    position:relative; text-align: center;
    background-repeat: no-repeat; background-size: cover;
    min-height:100%; color:#fff;
}
.item:after {
    content: ''; position:absolute; width:100%; height:100%; top:0; left:0;
    background-color:#000; opacity:0.3;
}

我想我不明白你的问题,但它仍然值得一试。

http://jsfiddle.net/DIRTY_SMITH/abtuj3xj/1/

section {
    position:relative; text-align: center;
    background-repeat: no-repeat; background-size: cover;
    min-height:100%; color:#fff;z-index: -9999;
}

.item:after {
    content: ''; position:absolute; width:100%; height:100%; top:0; left:0;
    background-color:#000; opacity:0.3; z-index: -9999;
}