input[type="radio"]:not(old){
width:28px;
margin:0;
padding:0;
@include opacity(0);
}
input[type="radio"]:not(old) + label{
display: inline-block;
margin-left: -28px;
padding-left: 18px;
background: url("//www.shopunt.com/images/eng/btn/radio.png") no-repeat;
width:auto;
line-height: 12px;
}
input[type="radio"]:not(old):checked + label{
background: url("//www.shopunt.com/images/eng/btn/radio-r.png") no-repeat;
width:auto;
}但是chrome的新版本(39版)後開始，不能直接在input旁邊加:not(old)，這段語法，點擊後，會無法正常顯示，所以解決的方法有兩個
1. 要使用:not(old)這段語法，不能在input旁邊加，必須是在他的外層上加，如下所例
.r-btn:not(old){
input[type="radio"]{
width:28px;
margin:0;
padding:0;
@include opacity(0);
}
input[type="radio"] + label{
display: inline-block;
margin-left: -28px;
padding-left: 18px;
background: url("//www.shopunt.com/images/eng/btn/radio.png") no-repeat;
width:auto;
line-height: 12px;
}
input[type="radio"]:checked + label{
background: url("//www.shopunt.com/images/eng/btn/radio-r.png") no-repeat;
width:auto;
}
}2. 不使用:not(old)，改用:not(:checked)寫法，Selectors 4也建議使用此語法，如下所例
input[type="radio"]:not(:checked), input[type="radio"]:checked {
position: absolute;
left: -9999px;
}
input[type="radio"]:not(checked) + label{
display: inline-block;
margin-left: 4px;
padding-left: 18px;
background: url("//www.shopunt.com/images/eng/btn/radio.png") no-repeat;
width:auto;
line-height: 12px;
}
input[type="radio"]:checked + label{
background: url("//www.shopunt.com/images/eng/btn/radio-r.png") no-repeat;
width:auto;
}