添加背景图像时不会出现CSS悬停效果

Question

我在div Applicative内的按钮上添加了css悬停效果。其中还有一个main-container div，里面有一个background div。问题是每次都有一个背景图像，悬停效果没有显示，但如果我删除背景图像，效果是可见的。我该如何解决？ demo

layer

.background {
    position: relative;
}

.background  img{
    max-width:100%;
	max-height:800px;
}

.layer {
    background-color: rgba(248, 247, 216, 0.7);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.btn {
	border: none;
	font-family: inherit;
	font-size: inherit;
	color: inherit;
	background: none;
	cursor: pointer;
	padding: 25px 80px;
	display: inline-block;
	margin: 15px 30px;
	text-transform: uppercase;
	letter-spacing: 1px;
	font-weight: 700;
	outline: none;
	position: relative;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

.btn:after {
	content: '';
	position: absolute;
	z-index: -1;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

.btn:before {
	speak: none;
	font-style: normal;
	font-weight: normal;
	font-variant: normal;
	text-transform: none;
	line-height: 1;
	position: relative;
	-webkit-font-smoothing: antialiased;
}

/* Button 1 */
.btn-1 {
	border: 3px solid #fff;
	color: #fff;
}

.btn-1f {
	overflow: hidden;
}

.btn-1f:after {
	width: 101%;
	height: 0;
	top: 50%;
	left: 50%;
	background: #000;
	opacity: 0;
	-webkit-transform: translateX(-50%) translateY(-50%);
	-moz-transform: translateX(-50%) translateY(-50%);
	-ms-transform: translateX(-50%) translateY(-50%);
	transform: translateX(-50%) translateY(-50%);
}

.btn-1f:hover,
.btn-1f:active {
	color: #0e83cd;
}

.btn-1f:hover:after {
	height: 75%;
	opacity: 1;
}

.btn-1f:active:after {
	height: 130%;
	opacity: 1;
}
.background {
    position: relative;
	width: inherit;
	height:inherit;
	background-image: url("http://www.wallpapereast.com/static/images/nature-wallpaper-desktop-308_ySxPe7m.jpg");
}
.main-container{
	width:100%;
	height:745px;
	position:relative;
}
.cities{position:absolute;bottom:0;}

Answer 1

我检查了你的代码。 在背景上给Z-index负数，如下所示

.background {
    background-image: url("http://www.wallpapereast.com/static/images/nature-wallpaper-desktop-308_ySxPe7m.jpg");
    height: inherit;
    position: relative;
    width: inherit;
    z-index: -1;
}

Answer 2

你可以这样做：

e.preventDefault();
if (event.stopPropagation)
    event.stopPropagation();
event.cancelBubble = true;
return false;

Answer 3

给按钮z-index。

例如：z-index: 999;