CSS：使文本顯示在我的div中的漸變上方

Question

我正在新聞匯總網站的主頁上工作，應該有幾個區域可以將背景圖片和頂部文本帶入內容，並在兩者之間形成漸變。 除了z-index較低之外，大部分情況下我都擁有它，但漸變仍然顯示在文本框上方。 為了確保這一點，我已經在堅實的背景下進行了實驗。 代碼和示例在這里： 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

將（position：relative）和（z-index：201）添加到特征底部h3和h2。 在下面找到修改后的代碼：

.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; }

Answer 2

為什么不對.feature-bottom應用漸變？ 像這樣： http : //jsfiddle.net/cx0uvshd/2/

在當前版本中，盡管z-index較大，但您仍具有:before元素覆蓋。 您需要新的堆疊上下文

這是一個類似的問題

Answer 3

不太干凈的解決方案是添加另一個div，其內容低於漸變1。 然后給該div一個類，該類是feature-bottom的副本。 然后將特征底部的顏色設置為透明以隱藏文本。 同時更改最后兩個選擇器以使用復制類。 同時復制最后兩個選擇器以用於新類。 的jsfiddle

CSS：

.feature { position: relative; float: left; width: 465px; height: 170px; margin-top: 24px; margin-right: 30px; }
    .feature.last { margin-right: 0; }


/*Copy of feature bottom*/
.feature-bottom2 {
background: none;
position: absolute;
bottom: 0;
left: 0;
padding: 0 30px 6px;
width: 100%;
z-index: 200;
line-height: 1;
}
.feature-bottom {
    color: transparent;
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 );
}
/* Copy of below*/
.feature-bottom2 h3 { color: #FFF; font-size: 15px; font-    weight: 400; margin: 0; }
.feature-bottom2 h2 { color: #FFF; font-size: 24px; font-weight: 400; margin: 0; }

.feature-bottom h3 { font-size: 15px; font-weight: 400; margin: 0; }
.feature-bottom h2 { font-size: 24px; font-weight: 400; margin: 0; }