为什么点击文字radio圆圈不选中 是浏览器问题吗？

<div class="form-group">
        <div class="col-xs-6">
            <div class="radio">
                <lable class="radio-inline">
                <input type="radio" name="number"/>男性
                </lable>
            </div>
            
        </div>
        <div class="col-xs-6">
            <div class="radio">
                <lable class="radio-inline">
                <input type="radio" name="number"/>女性
                </lable>
            </div>
            
        </div>