.kefu{
		position: fixed;
		bottom: 260px;
    	left: 50%;
    	margin-bottom: -69px;
    	margin-left: -141px;
		width: 250px;
		padding: 10px;
		box-shadow: 0 0 6px rgba(0,0,0,0.15);
    	border-radius: 3px;
    	background: #fff;
		overflow: hidden;
	z-index: 9999
	}
	.kefu img{
		width: 250px;
		height: 80px;
	}
	.kefu .kefu_t{
		width: 250px;
		margin-top: 10px;
		overflow: hidden
	}
	#btn{
		float: left;
		width: 118px;
    	height: 28px;
    	line-height: 30px;
    	font-size: 13px;
		color: #2778ff;
		border: solid 1px #2778ff;
		border-radius: 3px;
    	text-align: center;
    	text-decoration: none;
    	cursor: pointer;
	}
	.kefu .kefu_t a{
		float: right;
		width: 118px;
    	height: 28px;
    	line-height: 30px;
    	font-size: 13px;
		color: #fff;
		background: #2778ff;
		border-radius: 3px;
    	text-align: center;
    	text-decoration: none;
    	cursor: pointer;
	}
.dibu span{
		position: fixed;
		left:-5em;
		bottom: -5em;
	width: 10em;
    height: 10em;
    background: #ccc;
    border-radius: 5em;
    font-size: 11px;
	z-index: 9999;
	display: block
	}
	.dibu span a{
    line-height: 1;
	font-weight: normal;
    position: absolute;
    top: 2.5em;
    font-size: 11px;
	display: inline;
	right: 1em;
    left: auto;
	color: #fff;
    transform: rotate(45deg);
	}