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.wrap h3 {
	font-size:18px;
	color:#ffffff;
}
.wrap p {
	font-size:14px;
	color:#ffffff;
	font-variant-ligatures:common-ligatures
                                    discretionary-ligatures
                                    historical-ligatures;
}
body {
	min-height:100vh;
	box-sizing:border-box;
	margin:0;
	padding-top:calc(50vh - 6em);
	font:150%/1.6 Baskerville,Palatino,serif;
}
body,.wrap::before {
	background:url("http://www.jq22.com/demo/circleMagic201710082042/dest/img/bg.jpg") 0 / cover fixed;
}
.wrap {
	position:relative;
	margin:0 auto;
	padding:1em;
	max-width:23em;
	background:hsla(0,0%,100%,.25) border-box;
	overflow:hidden;
	border-radius:.3em;
	box-shadow:0 0 0 1px hsla(0,0%,100%,.3) inset,0 .5em 1em rgba(0,0,0,0.6);
	text-shadow:0 1px 1px hsla(0,0%,100%,.3);
}
.wrap::before {
	content:'';
	position:absolute;
	top:0;
	right:0;
	bottom:0;
	left:0;
	margin:-30px;
	z-index:-1;
	-webkit-filter:blur(20px);
	filter:blur(20px);
}

                        
↑上面代码改变,会自动显示代码结果 jQuery调用版本:1.11.3
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css3毛玻璃效果(背景虚化)

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