为什么设置了单选按钮透明度，怎么没反应
*{
margin: 0;
padding: 0;
}
body{
font-family: Georgia,serif;
background: #ddd;
font-weight: 400;
font-size: 15px;
color: #333;
-webkit-font-smoothing:antialiased;
}
a{
text-decoration: none;
color:#555;
}
<!-- 链接样式-->
.clr{
width: 0;
height:0;
overflow: hidden;
clear: both;
padding :0;
margin: 0;
}
.st-container{
width:100%;
height: 100%;
position: :absolute;
left: 0;
top :0;
font-family: "Josefin Slab","Myriad Pro",Arial,sans-serif;
}
.st-container > input,
.st-container > a{
width: 20%;
height: :34px;
line-height: 34px;
position: fixed;
bottom:0;
}
.st-container > input{
<!--- display: :none;position: absolute;left :-99999px;visibility: hidden;opacity: 0
都可以把元素影藏掉，
display: :none;影藏不占位，不在这个地方。position: absolute;在这个地方。left :-99999px;不存在--->
opacity: 0.8 ;
z-index：1000;
}
.st-container > a{
z-index: 10;
font-weight: 700;
font-size: 16px;
background: #e23a6e;
text-align: center;
color: #fff;
box-shadow: 1px 1px 1px rgba(151,24,64,0.2);
}
#st-control-1,#st-control-1 + a{
left: 0%;
}
#st-control-2,#st-control-2 + a {
left: 20%;
}
#st-control-3,#st-control-3 + a {
left: 40%;
}
#st-control-4,#st-control-4 + a {
left: 60%;
}
#st-control-5,#st-control-5 + a {
left: 80%;
}
.st-container input:checked + a {
background:#821134;
}
