css修改单选按钮样式

功能需要选择支付方式—css实现选中单选按钮样式切换

如图所示

上代码

// 代码片段为选择支付方式模块
// 原生效果
		<div class="order-pay pd border">
            <div class="label">请选择支付方式</div>
            <div class="item">
                <input class="check" type="radio" id="wx" name="item" value="选项一"/>
                <div class="check-back"></div>
                <label for="wx">
                    <div class="img"><img src="./img/weixin.png" alt=""></div>
                    <div class="method">微信支付</div>
                </label>
            </div>
            <div class="item">
                <input class="check" type="radio" id="zfb" name="item" value="选项二"/>
                <div class="check-back"></div>
                <label for="zfb">
                    <div class="img"><img src="./img/zfb.png" alt=""></div>
                    <div class="method">支付宝支付</div>
                </label>
            </div>
        </div>

/* rem为移动端单位 */
/* order-pay */
.order-pay{
     
    padding: .3rem .2rem;
}
.order-pay .label{
     
    color: #808080;
}
.order-pay .item{
     
    position: relative;
    height: 1rem;
    line-height: 1rem;
    text-align: center;
    display: flex;
}
.order-pay .item input{
     
    width: .4rem;
    height: .4rem;
    margin-top: .35rem;
}
.order-pay .img{
     
    margin: 0 .2rem;
}
.order-pay img{
     
    width: .4rem;
    height: .4rem;
    vertical-align: middle;
}
.order-pay label{
     
    height: 1rem;
    line-height: 1rem;
    width: 100%;
    display: flex;
    margin-left: .45rem;
}
.order-pay .method{
     
    color: #666666;
}
.check{
     
    width: .4rem;
    height: .4rem;
    position: absolute;
    opacity: 0;
    z-index: 3;
}
.check-back{
     
    width:.4rem;
    height:.4rem;
    position: absolute;
    background: url("./img/check.png");
    background-size: contain;
    background-repeat: no-repeat;
    z-index: 2;
    top: .35rem;
}
.item input:checked + .check-back{
     
    background: url("./img/checked.png");
    background-size: contain;
    background-repeat: no-repeat;
}
.pay-btn{
     
    width:6.8rem;
    height:1rem;
    line-height: 1rem;
    text-align: center;
    background:rgba(233,86,26,1);
    color: #fff;
    border-radius:8px;
    margin: .2rem auto;
}