�</h2> <div id="radio"><div class="radio-group"><div class="radio-group"><label class="radio-box checked"><input type="radio" value="1" checked="checked"> <span class="radio-text">选项1
    </span></label><label class="radio-box"><input type="radio" value="2"> <span class="radio-text">选项2
    </span></label><label class="radio-box"><input type="radio" value="3"> <span class="radio-text">选项3
    </span></label></div></div></div> <div class="language-html extra-class"><pre class="language-html"><cod