style.css

.aDiv{
	background-image:linear-gradient(rgba(153,153,153,.65) 0,rgba(153,153,153,.65) 100%);
	color:white;
	height:auto;
	width:1000px;
	position:relative;
	margin:50px auto;animation-delay:1s;
    -webkit-animation-delay:1s;
	-webkit-animation:mymove 2s ;
}
.logo{
	width:80%;	
}

.input_search{
	width:500px;
	text-align:left;
	float:center;
	height:40px;
	border:solid #ccc 1px;
	font-size:20px;
	padding-left:10px;
	vertical-align:middle;
}

.input :focus{
	border:solid #4791ff 1px;
}
.icon_search{
	width:20px;
	height:30px;
	text-align:right;
	background: #fff 			     background-image:url(https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/static/protocol/https/soutu/img/soutu_icons_6eead741.png) no-repeat 0;}
.btn_search{
	vertical-align:middle;
	width:120px;
	height:40px;
	border:none;
	background-color:#4791ff;
	font-size:18px;
	color:white;	
	text-align:center;}
.main{
	clear:both;
	vertical-align:top;
	text-align:center;
	margin:20px auto;
	-webkit-animation:search_move 0.5s;
}
@-webkit-keyframes search_move{
	from{
		margin-top:0px;
	}
	to{
		margin-top:20px;
		visibility:visible;
		}
}
@-webkit-keyframes mymove{
	from{
		margin:100px auto;
		display:none;
	}
	to{
		margin:50px auto;
		display:block;
	}
}
body{
	background-repeat:no-repeat;
	background-attachment:fixed;
	background-color:rgb(255, 255, 255);background-image:url("https://ss3.bdstatic.com/lPoZeXSm1A5BphGlnYG/skin/2.jpg?2");
	width:1200px;
	height:100%;
	position:relative;
	margin:0 auto;
	text-decoration:none;
}
.span_show{
	height:30px;
	width:120px;
	display:inline-block;
	text-align:center;
	float:left;
	padding-top:15px;
	cursor:pointer;
	color:#000;
	border-bottom:thin  #000;
}

.item{
	background-color:#FFF;
	width:120px;
	height:40px;
	color:#000;
	text-align:center;
	padding-top:20px;
	margin-left:15px;
	vertical-align:middle;
	text-decoration:none;
	float:left;

	}
.web{
	text-decoration:none;
	color:#000;
	padding-left:5px;
	vertical-align:middle;
}
.comment {
	display:none;
	background-color:#FF0;
	font-size:12px;
	height:15px;
	margin-top:5px;
	text-decoration:underline;
}
.foot{
	padding-top:50px;
	text-align:center;
	color:#FFF;
	font-size:12px;
	
	}