event_news/modules/event_news_mod/event_news_index7.html.erb

<div class="i-annc index-announcement-7">
  <h3 class="i-annc__page-title">{{page-title}}</h3>
  <ul class="i-annc__list  row" data-level="0" data-list="event_news">
    <li class="i-annc__item  col-md-4">
    <div class="i-annc__img-wrap bullseye">
      <img class="i-annc__img" src="{{img_src}}" alt="{{img_description}}" title="{{img_description}}">
    </div>
    <div class="i-annc__content-wrap">
      <div class="i-annc__meta">
        <span class="i-annc__status-wrap" data-list="statuses" data-level="1">
          <span class="i-annc__status label {{status-class}}">{{status}}</span>
        </span>
        <span class="i-annc__postdate-wrap" date-format="%Y-%m-%d">
          <i class="fa fa-calendar-o"></i>
          <span class="i-annc__postdate">{{postdate}}</span>
        </span>
        <span class="i-annc__category-wrap">
          <i class="fa fa-tasks"></i>
          <span class="i-annc__category">{{category}}</span>
          </span>
      </div>
      <h4 class="i-annc__entry-title">
        <a class="i-annc__title" href="{{link_to_show}}">{{title}}</a>
      </h4>
      <p class="i-annc__subtitle">{{subtitle}}</p>
    </div>
    </li>
  </ul>
</div>
{{pagination_goes_here}}
<script>
	var lilength = $('.i-annc.index-announcement-7 li.i-annc__item').length;
	function combineul(){
		for(var i=1;i<$('.i-annc.index-announcement-7 ul.i-annc__list').length;i++)
			$('.i-annc.index-announcement-7 ul.i-annc__list').eq(0).find('>li').eq(-1).after($('.i-annc.index-announcement-7 ul.i-annc__list').eq(i).html());
		var ullength = $('.i-annc.index-announcement-7 ul.i-annc__list').length;
		for(var i = 1;i < ullength;i++)
			$('.i-annc.index-announcement-7 ul.i-annc__list').eq(-1).remove();
	};
	function reorganize(num){
		combineul();
		for(var i=1;i< Math.ceil(lilength/num);i++){
			$('.i-annc.index-announcement-7 ul.i-annc__list').eq(-1).after('<ul class="i-annc__list  row" data-level="0" data-list="event_news"></ul>')
			var lihtml="";
			if(i != (Math.ceil(lilength/num)-1)){
				for(var j=0;j<num;j++)
					lihtml += "<li class='i-annc__item  col-md-4'>"+$('.i-annc.index-announcement-7 li.i-annc__item').eq(i*num+j).html()+"</li>"
			}else{
				for(var j=0;j< lilength - num *(Math.ceil(lilength/num)-1) ;j++)
					lihtml += "<li class='i-annc__item  col-md-4'>"+$('.i-annc.index-announcement-7 li.i-annc__item').eq(i*num+j).html()+"</li>"
			};
			$('.i-annc.index-announcement-7 ul.i-annc__list').eq(-1).html(lihtml);
		};
		if(Math.ceil(lilength/num) != 1 )
			for(var i=0;i< lilength -num ; i++ )
				$('.i-annc.index-announcement-7 ul.i-annc__list').eq(0).find("li.i-annc__item").eq(num).remove();
		$('.i-annc.index-announcement-7 ul.i-annc__list >li').css('width','calc('+100/num+'% - '+20/16+'em)'); //20px=>li的margin
	};
	$(document).ready(function(){
		if($(window).width()>1024){
			reorganize(3);
			num=3;
		}else if($(window).width()>576){
			reorganize(2);
			num=2;
		}else{
			reorganize(1);
			num=1;
		}
	});
	$(window).resize(function(){
		if($(window).width()>1024){
			reorganize(3);
			num=3;
		}else if($(window).width()>576){
			reorganize(2);
			num=2;
		}else{
			reorganize(1);
			num=1;
		}
	})
</script>