html,body,ul,li,a {
	margin:0;
	padding:0;
}
ul {
	list-style:none;
	margin:150px;
}
/* 按钮效果 */
    .myBtn {
	padding:20px 40px;
	font-size:13px;
	color:#333;
	text-decoration:none;
	box-sizing:border-box;
	position:relative;
	border:1px solid #e0e0e0;
	border-radius:3px;
}
.myBtn:before,.myBtn:after {
	box-sizing:border-box;
	content:'';
	border:1px solid transparent;
	border-radius:3px;
	position:absolute;
	width:0;
	height:0;
}
.myBtn:before {
	top:0;
	left:0;
	transition:border-color 0s .8s,width .2s .6s,height .2s .4s;
}
.myBtn:hover:before {
	border-top-color:#3db4d8;
	/* 上边框颜色 */
      border-right-color:#3db4d8;
	/* 右边框颜色 */
      width:100%;
	height:100%;
	transition:width .2s,height .2s .2s;
}
.myBtn:after {
	right:0;
	bottom:0;
	transition:border-color 0s .4s,width .2s .2s,height .2s;
}
.myBtn:hover:after {
	border-bottom-color:#3db4d8;
	/* 下边框颜色 */
      border-left-color:#3db4d8;
	/* 左边框颜色 */
      width:100%;
	height:100%;
	transition:border-color 0s .4s,width .2s .4s,height .2s .6s;
}