<fieldset>
    <legend style="color: red;">自定義單選框radio</legend>
    <div class="login_agree">
        <input type="radio" id="agree_btn">
        <label for="agree_btn"  class="input_agree" style="width: 36%;">同意XXX協議</label>
    </div>
</fieldset>
<fieldset
 
>
   <legend style="color: red;">自定義複選框checkbox</legend>
   <div class="sex_checkbox">
     <input type="checkbox" checked="" id="sex_male" value="1" name="sex"><label for="sex_male">男</label>
     <input type="checkbox" id="sex_female" value="0" name="sex">
 
<label for="sex_female">女</label>
   </div>
</fieldset>

style：

/*公共部分——按鈕樣式*/
        label::before {
            content: "";
            display: inline-block;
            width: 20px;
            height: 20px;
            background: #EEE;
            vertical-align: middle;
            -webkit-border-radius
 
: 50%;
            margin-right: 10px;
            -webkit-box-sizing:border-box;
          -webkit-transition:background ease-in .5s
        }
        input[type="checkbox"]:checked+label::before{
            background-color: #6399ae;
            border: 2px #b3b3b3 solid;
        }
        /*自定義單選框radio樣式*/
        .login_agree {
            position: relative;
        }
        .login_agree input[type="radio"]{
            display: none;
        }
        .login_agree input[type="radio"]:checked+label::before{
            background-color: #f4d345;
            border: 4px #ccc solid;
        }
        /*自定義複選框checkbox*/
        .sex_checkbox{
            position: relative;
        }
        .sex_checkbox input[type="checkbox"]{
            display: none;
        }

複選框中男女性別的選擇用jquery控制二者選其一

/*自定義複選框checkbox需要用js控制，二者只可選擇其一*/
$('.sex_checkbox').find('input[type=checkbox]').bind('click', function(){
    $('.sex_checkbox').find('input[type=checkbox]').not(this).attr("checked", false);
});