<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>RGBA colors</title> <style type="text/css"> body{background:url(http://static.mukewang.com/static/img/logo_index.png)} p{ font-size:42px; text-align:center; font-weight:bold; background-color:rgba(255,255,225,0.5); } </style></head><body><p>背景半透明的？</p></body></html>
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