CSS延迟过渡

Question

以下 CSS 工作正常，但我试图为翻转效果添加 1 或 2 秒的延迟。当您悬停它时，'.back' 是可见的，然后当您离开该区域时，'.front' 是可见的。我想添加一个延迟，这样当你离开该区域时，它需要一两秒钟才能返回到“.front”。这可能吗？

.panel {
    width: 250px!important;
    height: 250px;
    margin: auto!important;
    position: relative;
    -webkit-perspective:1000px;
}

.card {
    width: 100%!important;
    height: 100%;
    -o-transition: all .5s;
    -ms-transition: all .5s;
    -moz-transition: all .5s;
    -webkit-transition: all .5s;
    transition: all .5s;
    -webkit-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
    position: absolute;
    top: 0px;
    left: 0px;
}

.front {
    z-index: 2;
}

.back {
    background-color:#fff;
    z-index: 1;
    -webkit-transform: rotateY(-180deg);
    -ms-transform: rotateY(-180deg);
    -moz-transform: rotateY(-180deg);  
    transform: rotateY(-180deg); 
    transition-delay: 2s; 
}

.back p{
    margin-top: 90px;
    font-size: 20px;
    text-align:center;
}

.panel:hover .front {
    z-index: 1;
    -webkit-transform: rotateY(180deg);
    -ms-transform: rotateY(180deg);
    -moz-transform: rotateY(180deg);
    transform: rotateY(180deg);
     -webkit-transition:-webkit-transform 1s;
    transition:transform 1s;


}

.panel:hover .back {
    z-index: 2;   
    -webkit-transform: rotateY(0deg);
    -ms-transform: rotateY(0deg);
    -moz-transform: rotateY(0deg);
    transform: rotateY(0deg);
     -webkit-transition:-webkit-transform 1s;
    transition:transform 1s;
    transition-delay: 2s; 
}

HTML

<li class="panel"><a href="{{link}}"><img class="front card" src="{{image}}" /></a><div class="back card"><p>{{model.user.full_name}}</p></div></li>

Answer 1

将transition-delay 添加到.card - fiddle

.card {
   -o-transition: all .5s 2s;
   -ms-transition: all .5s 2s;
   -moz-transition: all .5s 2s;
   -webkit-transition: all .5s 2s;
    transition: all .5s 2s;
}