.tip {
	display: inline-block;
	position: relative;
}

.tip:before, .tip:after {
	opacity: 0; /*透明度为完全透明*/
	position: absolute;
	z-index: 1000; /*设为最上层*/
	/*鼠标放上元素上时的动画，鼠标放上后效果在.tip-*:hover:before, .tip-*:hover:after中设置;
            0.3s:规定完成过渡效果需要多少秒或毫秒,ease:规定慢速开始，然后变快，然后慢速结束的过渡效果*/
	transition: 0.3s ease;
	-webkit-transition: 0.3s ease;
	-moz-transition: 0.3s ease;
}

.tip:before {
	content: '';
	border: 6px solid transparent;
}

.tip:after {
	content: attr(data-tip); /*后去要提示的文本*/
	padding: 5px;
	white-space: nowrap; /*强制不换行*/
	background-color: #000000;
	color: #ffffff;
}

.tip:hover:before, .tip:hover:after {
	opacity: 1; /*鼠标放上时透明度为完全显示*/
	z-index: 1000;
}

/*top*/
.tip-top:before {
	bottom: 100%;
	left: 50%;
	border-top-color: rgba(0, 0, 0, 0.8); /*小三角效果*/
	margin-left: -3px;
	margin-bottom: -12px;
}

.tip-top:after {
	bottom: 100%;
	left: 50%;
	margin-left: -6px;
}

.tip-top:hover:before {
	margin-bottom: -6px;
}

.tip-top:hover:after {
	margin-bottom: 6px;
}

/*bottom*/
.tip-bottom:before {
	top: 100%;
	left: 50%;
	border-bottom-color: rgba(0, 0, 0, 0.8);
	margin-left: -3px;
	margin-top: -9px;
}

.tip-bottom:after {
	top: 100%;
	left: 50%;
	margin-left: -6px;
	margin-top: 3px;
}

.tip-bottom:hover:before {
	margin-top: -3px;
}

.tip-bottom:hover:after {
	margin-top: 9px;
}

/*right*/
.tip-right:before {
	top: 50%;
	left: 100%;
	border-right-color: rgba(0, 0, 0, 0.8);
	margin-left: -9px;
	margin-top: -3px;
}

.tip-right:after {
	top: 50%;
	left: 100%;
	margin-left: 3px;
	margin-top: -6px;
}

.tip-right:hover:before {
	margin-left: -3px;
}

.tip-right:hover:after {
	margin-left: 9px;
}

/*left*/
.tip-left:before {
	top: 50%;
	left: 0%;
	border-left-color: rgba(0, 0, 0, 0.8);
	margin-left: 0px;
	margin-top: -3px;
}

.tip-left:after {
	top: 50%;
	right: 100%;
	margin-right: 0px;
	margin-top: -6px;
}

.tip-left:hover:before {
	margin-left: -6px;
}

.tip-left:hover:after {
	margin-right: 6px;
}