原效果用addClass 改為slideUp，純學習
效果圖：
代碼如下：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <link rel="stylesheet" type="text/css" href="css.css" rel="external nofollow" > <title>Document</title></head><body> <style type="text/css">*{margin:0;padding:0;list-style-type:none;}a,img{border:0;}a{color:#000;text-decoration: none;font-weight: 600}body{font:12px/180% Arial, Helvetica, sans-serif, "新宋體";}.sph{ width: 1300px; margin: 0 auto; padding: 100px 0;}.spbq{ width: 250px; height: 250px; float: left; line-height: 2; padding: 10px 10px 0 20px; margin: 20px; position: relative; overflow: hidden;}.spbq h2{ color: #14191e; font: bold 14px/18px "Microsoft Yahei","Hiragino Sans GB",Helvetica,"微軟雅黑",Tahoma,Arial,sans-serif; margin-top: 18px;}.spbq span{ display: block; color: #b4bbbf; font: 12px/18px "Microsoft Yahei","Hiragino Sans GB",Helvetica,"微軟雅黑",Tahoma,Arial,sans-serif; margin: 8px 0;}.spbq b{ color: #787d82; font: 12px/18px "Microsoft Yahei","Hiragino Sans GB",Helvetica,"微軟雅黑",Tahoma,Arial,sans-serif;}.biankuang{ width: 3px; height: 3px; position: absolute; z-index: 99; border-radius:10px; /*background: black;*/}.biankuang_1{ height: 3px; top: -6px; left:0px; border-left: 3px solid #EB5858;}.biankuang_2 { width: 0px; bottom:-3px; left: 0px; border-top: 3px solid #EB5858;}.biankuang_3{ height: 0px; bottom:0px; right:0px; border-right: 3px solid #EB5858;}.biankuang_4{ width:0px; top:-3px; right:0px; border-bottom: 3px solid #EB5858;}.text_gobuy { position: absolute; z-index: 9; bottom: 0; left: 0px; width: 280px; height: 50px; overflow: hidden; background-color: rgba(32, 32, 33,0.5); cursor: pointer; display: none; text-align: center;}.text_gobuy_show{padding: 20px 15px ;opacity: 1;}.spbq p{ position: absolute; bottom:10px; left:110px; line-height: 33px; color: #fff}</style></head><body><div class="sph"> <div class="spbq"> <div class="biankuang biankuang_1"></div> <div class="biankuang biankuang_2"></div> <div class="biankuang biankuang_3"></div> <div class="biankuang biankuang_4"></div> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基礎課程</h2><span>讓jQuery帶您進入網頁動態交互世界，為...</span><b>更新完畢 15783人學習</b></a> <div class="text_gobuy"> <br/> <p>9小時17分鐘 | 初級</p> <br/> </div> </div> <div class="spbq"> <div class="biankuang biankuang_1"></div> <div class="biankuang biankuang_2"></div> <div class="biankuang biankuang_3"></div> <div class="biankuang biankuang_4"></div> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基礎課程</h2><span>讓jQuery帶您進入網頁動態交互世界，為...</span><b>更新完畢 15783人學習</b></a> <div class="text_gobuy"> <br/> <p>9小時17分鐘 | 初級</p> <br/> </div> </div> <div class="spbq"> <div class="biankuang biankuang_1"></div> <div class="biankuang biankuang_2"></div> <div class="biankuang biankuang_3"></div> <div class="biankuang biankuang_4"></div> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基礎課程</h2><span>讓jQuery帶您進入網頁動態交互世界，為...</span><b>更新完畢 15783人學習</b></a> <div class="text_gobuy"> <br/> <p>9小時17分鐘 | 初級</p> <br/> </div> </div> <div class="spbq"> <div class="biankuang biankuang_1"></div> <div class="biankuang biankuang_2"></div> <div class="biankuang biankuang_3"></div> <div class="biankuang biankuang_4"></div> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基礎課程</h2><span>讓jQuery帶您進入網頁動態交互世界，為...</span><b>更新完畢 15783人學習</b></a> <div class="text_gobuy"> <br/> <p>9小時17分鐘 | 初級</p> <br/> </div> </div></div> <script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script> <script type="text/javascript">function biankuang(obj) { $(obj).find('.biankuang_1').stop(true).animate({ height: '305px' }, 300) $(obj).find('.biankuang_2').stop(true).delay('300').animate({ width: '305px' }, 300) $(obj).find('.biankuang_3').stop(true).animate({ height: '305px' }, 300) $(obj).find('.biankuang_4').stop(true).delay('300').animate({ width: '305px' }, 300)}function biankuang1(obj) { $(obj).find('.biankuang_1').animate({ height: '0' }, 100) $(obj).find('.biankuang_2').animate({ width: '0' }, 100) $(obj).find('.biankuang_3').animate({ height: '0' }, 100) $(obj).find('.biankuang_4').animate({ width: '0' }, 100)}$('.spbq').hover(function() { var obj = $(this); obj.find('.text_gobuy').slideDown(300); biankuang(obj);}, function() { var obj = $(this); obj.find('.text_gobuy').slideUp(300); biankuang1(obj);})</script></body></html>以上就是本文的全部內容，希望本文的內容對大家的學習或者工作能帶來一定的幫助，同時也希望多多支持武林網！
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