CSS3实现雪花飘落动画_html/css_WEB-ITnose

  	 	 	 	 	 	 snowflake 	  	 		body {			padding: 0;			margin: 0;			background-color: #333;			font-size: 14px;			color: #BCBCBC;		}		input {			border: solid 0px #DDD;			border-radius: 5px;			padding: 5px 10px;			width: 120px;		}		button {			border: solid 0px #CCC;			border-radius: 5px;			background-color: #FFF;			padding: 5px 10px;		}		#sky {			width: 100%;			max-width: 640px;			height: 100%;			background-color: #A39;			margin: 0 auto;			position: relative;    		overflow: hidden;		}		.snowflake {			width: 50px;			height: 50px;			border-radius: 50px;			background-color: rgba(255, 255, 255, 0.5);			position: absolute;			top: 10px;			left: 100px;			display: inline-block;			transition: top 2s;			-moz-transition: top 2s;/* Firefox 4 */			-webkit-transition: top 2s;/* Safari 和 Chrome */			-o-transition: top 2s;			transition-timing-function: cubic-bezier(0.25,0.1,0.25,1);			-moz-transition-timing-function: cubic-bezier(0.25,0.1,0.25,1);			-webkit-transition-timing-function: cubic-bezier(0.25,0.1,0.25,1);			-o-transition-timing-function: cubic-bezier(0.25,0.1,0.25,1);		}		#operate {			text-align: right;		}		#operate div {			margin: 10px;		}	   	


      
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