html - CSS:让文本出现在我的 div 中的渐变之上

Question

我正在处理一个新闻聚合网站的主页，我们应该有几个区域来引入内容，其中照片在背景中，文本在顶部，两者之间有渐变。在大多数情况下，我有它，除了即使 z-index 较低，渐变仍然出现在文本框上方。为了确定，我已经在坚实的背景下对此进行了试验。代码和示例在这里:http://jsfiddle.net/cx0uvshd/

<style type="text/css">
    .feature {
        position: relative;
        float: left; 
        width: 465px; 
        height: 170px;  
        margin-top: 24px; 
        margin-right: 30px; 
    }
    .feature.last { 
        margin-right: 0; 
    }
    .feature-bottom {
        background: none;
        position: absolute;
        bottom: 0;
        left: 0;
        padding: 0 30px 6px;
        width: 100%;
        z-index: 200;
        line-height: 1;
    }
    .feature-bottom::after {
        content: "";
        position: absolute;
        bottom: 0px;
        left: 0px;
        width: 100%;
        height: 100%;
        z-index: 100;
        background: rgba(0,0,0,0);
        background: -moz-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
        background: -webkit-gradient(left top, left bottom, color-stop(0%, rgba(0,0,0,0)), color-stop(50%, rgba(0,0,0,0.5)), color-stop(100%, rgba(0,0,0,0.5)));
        background: -webkit-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
        background: -o-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
        background: -ms-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
        background: linear-gradient(to bottom, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
        filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#000000', endColorstr='#000000', GradientType=0 );
    }
    .feature-bottom h3 { 
        color: #FFF; 
        font-size: 15px; 
        font-weight: 400; 
        margin: 0; 
    }
    .feature-bottom h2 { 
        color: #FFF; 
        font-size: 24px; 
        font-weight: 400; 
        margin: 0; 
    }
</style>

Answer 1

将 (position:relative) 和 (z-index:201) 添加到你的特征底部 h3 和 h2。在下面找到修改后的代码:

.feature { position: relative; float: left; width: 465px; height: 170px;  margin-top: 24px; margin-right: 30px; }
.feature.last { margin-right: 0; }
.feature-bottom {
    background: none;
    position: absolute;
    bottom: 0;
    left: 0;
    padding: 0 30px 6px;
    width: 100%;
    z-index: 200;
    line-height: 1;
}
.feature-bottom::after {
    content: "";
    position: absolute;
    bottom: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    z-index: 100;
    background: rgba(0,0,0,0);
    background: -moz-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
    background: -webkit-gradient(left top, left bottom, color-stop(0%, rgba(0,0,0,0)), color-stop(50%, rgba(0,0,0,0.5)), color-stop(100%, rgba(0,0,0,0.5)));
    background: -webkit-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
    background: -o-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
    background: -ms-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
    background: linear-gradient(to bottom, rgba(0,0,0,0) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.5) 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#000000', endColorstr='#000000', GradientType=0 );
}
.feature-bottom h3 { position:relative; z-index:201; color: #FFF; font-size: 15px; font-weight: 400; margin: 0; }
.feature-bottom h2 { position:relative; z-index:201; color: #FFF; font-size: 24px; font-weight: 400; margin: 0; }