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                <div class="parallax">
  <h2>CSS 打造 parallax-background 背景視差滾動特效</h2>

<p class="des">
  而Facebook Message最強大的地方,就在於可跨裝置的登入帳號後,就可隨時的瀏覽訊息,今天因為梅干嫂忘了帶手機,無法使用LINE只好暫時的使用臉書訊息,但不想一直開著臉書網頁,以及安裝Facebook訊息,因此梅干就傳先前分享過的Chrome外掛給梅干嫂,才發現原來那外掛已經下架了,所以梅干找到另一套的臉書訊息外掛,讓你使用Chrome瀏覽其它網頁時,也不擔心臉書訊息漏接,真的是超方便啦! <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>


                h2{color:#fff; font-size:30px; text-align:center; background:rgba(0,0,0,0.5); padding:50px;}
.parallax {
  /* 設定背景圖片/居中/不重覆 */
  background: url("")center center no-repeat;

  /* 設定區塊高度 */
  min-height: 600px; 

  /* 背景自動縮放/固定 */
  background-attachment: fixed;
  background-size: cover;