我的可扩展内容在IE上不起作用

Question

任何想法为什么此代码在IE上不起作用？我已经测试了多个版本，据我所知，focus元素应该可以工作，但是由于某种原因，当我点击它时什么也没有发生。

.collapse { 
 
\t text-align:left; 
 
} 
 

 
.collapse > * + *{ 
 
    display:none; 
 
    
 
} 
 
.collapse > *{ 
 
    cursor:pointer; 
 
    } 
 
    
 
.collapse:focus{ 
 
    outline:none; 
 
} 
 
.collapse:focus > * + *{ 
 
    display:block; 
 
} 
 

 

 
.accordian-gradient { 
 
\t 
 
\t /*GRADIENT*/ 
 
\t background: rgba(168,168,168,1); 
 
/* Old Browsers */background: -moz-linear-gradient(top, rgba(168,168,168,1) 0%, rgba(203,203,203,1) 52%, rgba(234,234,234,1) 100%); 
 
/* FF3.6+ */background: -webkit-gradient(left top, left bottom, color-stop(0%, rgba(168,168,168,1)), color-stop(52%, rgba(203,203,203,1)), color-stop(100%, rgba(234,234,234,1))); 
 
/* Chrome, Safari4+ */background: -webkit-linear-gradient(top, rgba(168,168,168,1) 0%, rgba(203,203,203,1) 52%, rgba(234,234,234,1) 100%); 
 
/* Chrome10+,Safari5.1+ */background: -o-linear-gradient(top, rgba(168,168,168,1) 0%, rgba(203,203,203,1) 52%, rgba(234,234,234,1) 100%); 
 
/* Opera 11.10+ */background: -ms-linear-gradient(top, rgba(168,168,168,1) 0%, rgba(203,203,203,1) 52%, rgba(234,234,234,1) 100%); 
 
/* IE 10+ */background: linear-gradient(to bottom, rgba(168,168,168,1) 0%, rgba(203,203,203,1) 52%, rgba(234,234,234,1) 100%); 
 
/* W3C */filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#a8a8a8', endColorstr='#eaeaea', GradientType=0); 
 
/* IE6-9 */ 
 
\t 
 
\t 
 
}

<div style="width:100%; max-width:750px; text-align:left;" class="collapse" tabindex="4"> 
 
    <div style="width:100%; max-width:750px; text-indent:10px; margin-bottom:10px; padding:5px 0px 5px 0px;" class="accordian-gradient">Question<div style="width:20%; float:right; vertical-align:middle; text-align:right; padding-right:5px;">+&nbsp;</div> </div> 
 
    <div style="width:100%; max-width:700px; cursor:default; padding-bottom:10px; margin: 0 auto;"> 
 
    <p>Answer goes here</p> 
 
    </div> 
 
    </div>

有什么我可以加？由于它的内部样式表相当不可靠，而且没有javascript或jquery，所以我只能使用它。我必须尽可能多地保持CSS内联。

由于

Answer 1

:focus选择器被允许在该接受键盘事件或其它用户输入元件。

尝试使用<button>标记。

button:focus { 
    background-color: yellow; 
} 

<button>Expand me</button>

似乎在缘来进行工作。

编辑：

button { 
 
    width: 100%; 
 
    max-width: 750px; 
 
    background-color: Transparent; 
 
    background-repeat: no-repeat; 
 
    border: none; 
 
    cursor: pointer; 
 
    overflow: hidden; 
 
    outline: none; 
 
} 
 

 
p { 
 
    display: none; 
 
    background-color: aqua; 
 
    padding: 20px; 
 
} 
 

 
button:focus p { 
 
    display: block; 
 
} 
 

 
span { 
 
    width: 100%; 
 
    max-width: 750px; 
 
    text-align: left; 
 
} 
 

 
.gradient { 
 
    /*GRADIENT*/ 
 
    background: rgba(168, 168, 168, 1); 
 
    /* Old Browsers */ 
 
    background: -moz-linear-gradient(top, rgba(168, 168, 168, 1) 0%, rgba(203, 203, 203, 1) 52%, rgba(234, 234, 234, 1) 100%); 
 
    /* FF3.6+ */ 
 
    background: -webkit-gradient(left top, left bottom, color-stop(0%, rgba(168, 168, 168, 1)), color-stop(52%, rgba(203, 203, 203, 1)), color-stop(100%, rgba(234, 234, 234, 1))); 
 
    /* Chrome, Safari4+ */ 
 
    background: -webkit-linear-gradient(top, rgba(168, 168, 168, 1) 0%, rgba(203, 203, 203, 1) 52%, rgba(234, 234, 234, 1) 100%); 
 
    /* Chrome10+,Safari5.1+ */ 
 
    background: -o-linear-gradient(top, rgba(168, 168, 168, 1) 0%, rgba(203, 203, 203, 1) 52%, rgba(234, 234, 234, 1) 100%); 
 
    /* Opera 11.10+ */ 
 
    background: -ms-linear-gradient(top, rgba(168, 168, 168, 1) 0%, rgba(203, 203, 203, 1) 52%, rgba(234, 234, 234, 1) 100%); 
 
    /* IE 10+ */ 
 
    background: linear-gradient(to bottom, rgba(168, 168, 168, 1) 0%, rgba(203, 203, 203, 1) 52%, rgba(234, 234, 234, 1) 100%); 
 
    /* W3C */ 
 
    filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#a8a8a8', endColorstr='#eaeaea', GradientType=0); 
 
    /* IE6-9 */ 
 
}

<button class="gradient"> 
 
    <span>Question</span> 
 
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla gravida urna lacus, id tempor nulla tristique dapibus. Nulla efficitur felis iaculis mi aliquet, vel maximus dolor molestie. Nullam efficitur, urna et pretium gravida, enim justo lacinia justo, eget placerat elit nisi id sem. Pellentesque consequat pulvinar turpis, quis euismod velit. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Proin nec mattis dui, eget dapibus neque. Aliquam erat volutpat. Integer a dolor sit amet velit auctor egestas. Proin nibh felis, egestas et porta non, tincidunt non nunc. Duis aliquam, enim vulputate porta maximus, mi nunc pharetra turpis, vel vestibulum ipsum risus sit amet purus. Curabitur id bibendum ligula. Aenean ut ipsum sem. Sed placerat auctor accumsan. Morbi mollis id sapien eget ultricies. Cras tristique velit massa, a tincidunt nibh molestie commodo. Maecenas volutpat sit amet massa eu pulvinar.</p> 
 
</button>