radio 使用css修改默认单选样式

使用伪元素

<input class="radio_type" type="radio" name="type" id="radio2" /> 
<label for="radio2">radio2</label>

.radio_type{
    width: 20px;
    height: 20px;
    appearance: none;
    position: relative;
}
.radio_type:before{
    content: '';
    width: 20px;
    height: 20px;
    border: 1px solid #7d7d7d;
    display: inline-block;
    border-radius: 50%;
    vertical-align: middle;
}
.radio_type:checked:before{
    content: '';
    width: 20px;
    height: 20px;
    border: 1px solid #c59c5a;
    background:#c59c5a;
    display: inline-block;
    border-radius: 50%;
    vertical-align: middle;
}
.radio_type:checked:after{
    content: '';
    width: 10px;
    height:5px;
    border: 2px solid white;
    border-top: transparent;
    border-right: transparent;
    text-align: center;
    display: block;
    position: absolute;
    top: 6px;
    left:5px;
    vertical-align: middle;
    transform: rotate(-45deg);
}