@charset "utf-8";
/* CSS Document */

body {
	margin: 0;
	padding: 0;
	width: 100%;
	font-size: 18px;
	font-size: 1.25rem;
	font-family: Helvetica,Arial,sans-serif;
	line-height: 1.3;
	text-rendering: optimizeLegibility
}

ul {
	list-style: none;
	margin: 0;
	padding: 0
}

ul li {
	margin: 0;
	padding: 0
}

ol {
	margin: 0;
	padding: 0
}

p {
	padding: 0;
	margin: 0px 0px 5px 0px;
	margin: 0rem 0rem 0.3125rem 0rem
}

h1,h2,h3,h4,h5,h6 {
	padding: 0;
	margin: 0px 0px 10px 0px;
	margin: 0rem 0rem 0.625rem 0rem;
	font-weight: normal;
	
}

.header-sprite {
	display: block;
	cursor:pointer;
	text-indent:-5000px;
}

.home {
	overflow: hidden;
	position: relative;
	width: 100%;
	background: white
}


.home .home-background {
	display: block;
	position: relative;
	width: 1280px;
	height: 600px;
	margin-left: auto;
	margin-right: auto;
	overflow:hidden;
	background-image: -moz-linear-gradient( 90deg, rgb(224,224,224) 0%, rgb(255,255,255) 100%);
    background-image: -webkit-linear-gradient( 90deg, rgb(224,224,224) 0%, rgb(255,255,255) 100%);
    background-image: -ms-linear-gradient( 90deg, rgb(224,224,224) 0%, rgb(255,255,255) 100%);
	background-image: -o-linear-gradient(90deg, rgb(224,224,224) 0%,  rgb(255,255,255) 100%); 
	background-image: linear-gradient(0deg, rgb(224,224,224) 0%,  rgb(255,255,255) 100%); 
	background-image: -webkit-gradient(linear, bottom, top, from(#F4F4F4), to(#ffffff)); /* Saf4+, Chrome */
}

@media only screen and (min-width: 1281px) {
	.home .home-background {
		width: 100%;
	}
}

@media only screen and (max-width: 1110px) {
	.home .home-background {
		width: 100%;
	}
}





header {
	position: relative;
	width: 100%;
	z-index: 3;
	padding: 20px 0px 20px 0px;
	padding: 1.25rem 0rem 1.25rem 0rem;
}

@media only screen and (max-width: 1310px) {
	header {
		width: 100%;
		padding: 20px 15px 20px 15px;
		padding: 1.25rem 0.9375rem 1.25rem 0.9375rem;
	}
}
.row {
	max-width: 940px;
	max-width: 58.75rem;
	margin: 0 auto;
	position: relative;
	height: 100%
}

.logo {
	width: 89px;
	width:5.563rem;
	height: 70px;
	height:4.375rem;
	float:left;
	background-image:url(logo.svg);
	
}

header h1 {
	float: left;
	line-height: 15px;
	line-height: 0.9375rem
}

header h1 a {
	width: 220px;
	height: 70px;
	text-decoration: none;
	color: white
}

header h1 a span {
	position: relative;
	text-indent: -99999px;
	display: inline-block
}

header .right-panel {
	position: absolute;
	top: 7px;
	top: 0.4375rem;
	right: 0
}

.home h1{
text-indent: -5000px;
}

.home ul.items {
	margin:auto;
	height: 560px;
}

.home ul.items li {
	display: block;
	float: left;
	width:100%;
	height: 540px
}

.home .path1 {
	background: url(images/path.png) no-repeat center
}


@media only screen and (min-width:1281px) {
	.home .path1 {
		width: 100%;
		background: url(images/path.png) no-repeat center;
	}
}

@media only screen and (max-width:1016px) {
	.home .path1 {
		background: url(images/path.png) center no-repeat;
	}
}

@media only screen and (max-width:970px) {
	.home .path1 {
		background: url(images/tablet/path.png) center top no-repeat;
	}
}

@media only screen and (max-width:710px) {
	.home .path1 {
		background: url(images/mobile/path.png) center   no-repeat;
		background-position: center 120px;
	}

}

@media only screen and (max-width:450px) {
	.home .path1 {
		height: 339px;
		background: url(images/mobile/path-m.png) center no-repeat;
		background-position: center 120px;
	}
}


.home .home-content {
	position: relative;
	z-index: 3;
	top: -170px;
	top:-10.625rem;
	width: 940px;
	width: 58.75rem
}

@media only screen and (max-width: 940px) {
	.home .home-content {
		width: 100%;
	}
}

.home .goIlearn {
	position: absolute;
	bottom: 60px;
	right: 0;
	color: #606060;
	z-index: 5;
	width: 260px;

}
@media only screen and (max-width:970px) {
	.home .goIlearn {
		top: 220px;
		left:50px;
	}
}


@media only screen and (max-width: 710px) {
	.home .goIlearn {
		top: 20px;
		left:40px;
	}
}



.home .goIlearn h1 {
	text-align: left;
	font-family: Helvetica,Arial,sans-serif;
	font-size: 50px;
	font-size: 3.125rem;
	color: #000000;
	text-indent: 0;
}

.home .goIlearn p {
	font-family: Helvetica,Arial,sans-serif;
	text-align: left;
	font-size: 16px;
	font-size: 1rem;
	margin-bottom: 20px;
	margin-bottom: 1.25rem
}

.home .path2{
	
	
}

.home .path2 .insistStudy{
	margin:50px 0 0 0;
}

.home .path2 .insistStudy h1{
	font-size:40px;
	text-indent: 0;
}

.home .path2 .insistStudy p{
	font-size:24px;
}


.home .path2 .image{
	background: url(images/columnChat.png) no-repeat center;
	width:100%;
	height:220px;
	position:absolute;
	bottom:100px;
}



.home .insist{
	font-size:60px;
	
	
} 



.tiers{
	color: #7d7d7d;
	margin: 60px 0 140px 0;
	margin: 3.75rem 0  8.75rem 0;
}


@media only screen and (max-width:450px) {
	
	.tiers{
		color: #7d7d7d;
		margin: 60px 0 60px 0;
		margin: 3.75rem 0  3.75rem 0;
	}
}



.tiers  h1 {
	text-align:center;
	font-family: Helvetica,Arial,sans-serif;
	font-size: 50px;
	font-size: 3.125rem;
	color: #000000;
	margin:0 20px 16px 20px;
	margin:0 1.25rem 1rem 1.25rem;
}

@media only screen and (max-width:720px) {
	.tiers  h1 {
		font-size: 30px;
		font-size: 1.875rem;
	}

}


@media only screen and (max-width:470px) {
	.tiers  h1 {
		font-size: 20px;
		font-size: 1.25rem;
	}

}

.tiers  p {
	text-align:center;
	font-family: Helvetica,Arial,sans-serif;
	font-size: 16px;
	font-size: 1rem;
	color: #a9a9a9;
	margin:0 20px 0 20px;
	margin:0 1.25rem 0 1.25rem;
}

.tiers ul {
	position: relative;
	overflow: hidden;
	margin-top:20px;
	margin-top:1.25rem;
	
}

.tiers li {
	float:left;
	width:25%;
}


@media only screen and (max-width:710px) {
	.tiers li {
		width:50%;
		margin-top:40px;
		margin-top:2.5rem;
	}

}

@media only screen and (max-width:450px) {
	.tiers li {
		width:100%;
		margin-top:auto;
		margin-bottom:3.75rem;
	}

}




.tiers li h2 {
	color:#000000;
	text-align:center;
	font-size:20px;
	font-size:1.25rem;
}

.tiers .content {
	height:120px;
	height:7.5rem;
}



.tiers .icon {
	width:68px;
	width: 4.25rem;
	height: 68px;
	height: 4.25rem;
	margin:20px auto 0 auto;
	background: url('images/icon.png') no-repeat;
}

.tiers .ipad{
	width:50px;
	width: 3.125rem;
	height: 58px;
	height: 3.625rem;
	margin:40px auto 20px auto;
	background-position: 0px -266px;

}

.tiers .iphone{
	width:36px;
	width:2.25rem;
	height: 58px;
	height: 3.625rem;
	margin:40px auto 20px auto;
	background-position: -63px -207px;

}

.tiers .imac{
	width:62px;
	width: 3.875rem;
	height: 58px;
	height: 3.625rem;
	margin:40px auto 20px auto;
	background-position: 0px -207px;

}

.tiers .env{
	background-position: -69px 0;
}

.tiers .en{
	background-position: 0 -69px;
}

.tiers .math{
	background-position: -70px -138px;
}

.tiers .parent{
	background-position: -70px -69px;
}

.tiers .center{
	background-position: 0px -138px;
}


.intro .center-align {
	text-align: center
}

@media only screen and (max-width: 710px) {
	.intro .center-align {
		text-align: left;
	}
}


.intro ul {
	width: 100%;
	margin-left: auto;
	margin-right: auto
}


.intro ul li {
	width: 100%;
	position: relative;
	overflow: hidden;
	margin:0 0 100px 0;
	margin:0 0 6.25rem 0;
}

.intro ul li p {
	font-family: Helvetica,Arial,sans-serif;
	font-size: 16px;
	font-size: 1rem
}

.intro ul li.help{
	text-align:center;
	padding:0 0 5px 0;
	
	
}

.intro ul li.start{
	height: 220px;
	
}

.intro ul li.task{
	height: 239px;
}

.intro ul li.know{
	height: 321px;
}

.intro ul li.study{
	height: 258px;
}

.intro ul li.improve{
	height: 298px;
}

.intro h2 {
	text-align: center;
	font-family: Helvetica,Arial,sans-serif;
	font-size: 24px;
	font-size: 1.5rem;
	color: #000000;
	text-transform: uppercase;
	border-bottom: 1px solid #9c9c9c;
	display: inline;
}

.intro ul li .image{
	position: absolute;
  	width: 100%;
  	display: block;
	z-index:-1;
}



ul li.start .image{
	max-width: 445px;
	height: 87px;
	background: url(images/start.png) no-repeat;
	bottom: 0px;
	bottom: 0rem;
	right: 0px;
	right: 0rem;
}


@media only screen and (max-width: 710px) {
	ul li.start .image{
		bottom:0;
		top:auto;
		left:20px;
		right:auto;
	}
}

@media only screen and (max-width: 450px) {
	ul li.start .image{
		background: url(images/mobile/start.png) no-repeat;
		height:62px;
	}
}

@media only screen and (max-width: 710px) {
	
	.intro ul li.start{
		height:230px;	
	}
	
	.intro ul li.task{
		height:360px;	
	}
	
	.intro ul li.know{
		height:420px;	
	}
	
	.intro ul li.study{
		height:380px;	
	}
	
	.intro ul li.improve{
		height:420px;	
	}
	
	
}


ul li.task .image{
	max-width: 239px;
	height: 239px;
	background: url(images/calendar.png) no-repeat;
	top: 0px;
	top: 0rem;
	left: 0px;
	left: 0rem;
}
@media only screen and (max-width: 710px) {
	ul li.task .image{
		bottom:0;
		top:auto;
		right:20px;
		left:auto;
	}
}



ul li.know .image{
	max-width: 512px;
	height: 321px;
	background: url(images/brain.png) no-repeat;
	bottom: 0px;
	bottom: 0rem;
	right: 0px;
	right: 0rem;
}


@media only screen and (max-width: 710px) {
	ul li.know .image{
		background: url(images/tablet/brain.png) no-repeat;
		bottom:0;
		left:20px;
		top:auto;
		right:auto;
		height:257px;
		width:410px;
	}
	
	.intro ul li.know{
		height:360px;	
	}
	
	
}

@media only screen and (max-width: 430px) {
	ul li.know .image{
		background: url(images/mobile/brain.png) no-repeat;
		height: 188px;
		
	}
	
	.intro ul li.know{
		height:290px;	
	}
	
	
}



ul li.study .image{
	max-width: 534px;
	height: 258px;
	background: url(images/time.png) no-repeat;
	top: 0px;
	top: 0rem;
	left: 0px;
	left: 0rem;
}

@media only screen and (max-width: 710px) {
	ul li.study .image{
		bottom:0;
		top:auto;
		left:auto;
		right:20px;
	}
}

@media only screen and (max-width: 570px) {
	ul li.study .image{
		background: url(images/tablet/time.png) no-repeat;
		height:206px;
		width:427px;
	}
	
	.intro ul li.study{
		height:320px;	
	}
	
}

@media only screen and (max-width: 450px) {
	ul li.study .image{
		background: url(images/mobile/time.png) no-repeat;
		height:154px;
		width:320px;
	}
	
	.intro ul li.study{
		height:260px;	
	}
	
}




ul li.improve .image{
	max-width: 279px;
	height: 298px;
	background: url(images/improve.png) no-repeat;
	bottom: 0px;
	bottom: 0rem;
	right: 0px;
	right: 0rem;
}

@media only screen and (max-width: 710px) {
	ul li.improve .image{
		bottom:0;
		top:auto;
		left:20px;
		right:auto;
		
	}
}


.intro ul li h3 {
	font-size: 40px;
	font-size: 2.5rem;
	font-family: Helvetica,Arial,sans-serif;
	text-transform: uppercase;
	color: #000000;
	letter-spacing: 1.5px;
	letter-spacing: 0.09375rem
}

.intro ul li .grey{
	color:#707070;
}

ul li .leftcontent {
	left: 0;
	text-align: left;
	margin-left:20px;
}


@media only screen and (max-width: 710px) {
	.intro ul li .leftcontent {
		top: 0;
		left: 0;
		right: 0 !important;
		width: 100% !important;
		margin: 0 20px !important;
		margin: 0 1.25rem!important;
		float: none !important;
		background: white;
		
	}

	.intro ul li .leftcontent h3 {
		font-size: 20px;
		font-size: 1.25rem;
		color:#F5823E;
	}

	.intro ul li .leftcontent p {
		color: #696969;
		font-size: 14px;
		font-size: 0.875rem;
		padding-right:30px;
		padding-right:1.875rem;
	}
}



ul li .rightcontent {
	right: 0;
	text-align:right;
	margin-right:20px;
}


@media only screen and (max-width: 710px) {
	.intro ul li .rightcontent {
		top: 0;
		left: 0;
		right: 0 !important;
		width: 100% !important;
		margin: 0 0 0 -20px !important;
		margin: 0 0 0 -1.25rem !important;
		float: none !important;
		background: white;
	}

	.intro ul li .rightcontent h3 {
		font-size: 20px;
		font-size: 1.25rem;
		color:#F5823E;
	}

	.intro ul li .rightcontent p {
		color: #696969;
		font-size: 14px;
		font-size: 0.875rem
	}
}


.voice{
	overflow:hidden;
	
	
}

.voice .item{
	font-size:16px;
	color:#434343;
	text-indent:32px;
	
	pointer-events: none;
	
}

.uservoice{
	height:160px;
	width:80%;
	margin:auto;
	padding:0 20px 0 20px;

	
	
}

.trial{
	margin:100px 0 0 0;	
}

.trial ul{
	margin:40px 0 80px 0;
	overflow:hidden;
    
}

.trial  h1 {
	text-align:center;
	font-family: Helvetica,Arial,sans-serif;
	font-size: 50px;
	font-size: 3.125rem;
	color: #000000;
}


@media only screen and (max-width:600px) {
	.trial  h1 {
	text-align:center;
	font-family: Helvetica,Arial,sans-serif;
	font-size: 24px;
	font-size: 1.5rem;
	color: #000000;
}
	
}



.trial  ul li {
	text-align:center;
	width:50%;
	float:left;
}



@media only screen and (max-width:500px) {
	.trial  ul li {
		float:none;
		display:block;
		margin:0 auto 30px auto;
		width:100%;
	}
}


.button-primary--round {
	display: inline-block;
	box-sizing: border-box;
	padding: .6875rem .5625rem .5625rem;
	text-align: center;
	text-decoration: none;
	letter-spacing: .4px;
	letter-spacing: .025rem;
	font-size: 30px;
	font-size: 1.875rem;
	font-family: Gotham_SSm_5r,Helvetica,Arial,sans-serif;
}



.trial .button-primary--round{
	
	border: 1px solid #1fbc5a;
	background: #20c05c;
	color: #fff;
	-webkit-transition: background .25s ease-in-out 0;
	-moz-transition: background .25s ease-in-out 0;
	-o-transition: background .25s ease-in-out 0;
	transition: background .25s ease-in-out 0;
	
	-webkit-border-radius: 40px;
	-moz-border-radius: 40px;
	border-radius: 40px;
	
	min-width:230px;

}

.trial .button-primary--round:hover{
	background: #24D666 none repeat scroll 0% 0%;
}

@media only screen and (max-width:500px) {
	.trial .button-primary--round {
		float:none;
		margin:0 auto 30px auto;
		margin:0 auto 1.875px auto;
		font-size: 20px;
		font-size: 1.25rem;
		display: inline-block !important;
		
		width: 50%;
		
	}
	

}




.downloadapp{
padding: 2.5rem 0 5.375rem;

}

footer{
	margin-top:100px;
	
}

footer ul li{
	padding:0 20px 0 20px;
}


.footer-nav {
	clear: both;
	width: 100%;
	font-family: '微软雅黑',Helvetica,Arial,sans-serif;
	color: #ffffff;
	text-align: center;
	padding-top: 40px;
	padding-top: 2.5rem;
	background-color:#4A4A4A;
}

@media only screen and (min-width: 601px) {
	.footer-nav {
		padding: 40px 0px;
		padding: 2.5rem 0rem;
	}
}

.footer-nav .top-nav li {
	display: inline;
	position: relative;
	margin: 0px 10px;
	margin: 0rem 0.625rem
}

.footer-nav .top-nav{
	height:40px;
}


@media only screen and (min-width: 760px) {
	.footer-nav .top-nav li:after {
		position: absolute;
		color:#ECECEC;
		content: '.';
		top: -8px;
		top: -0.5rem;
		right: -12px;
		right: -0.75rem;
		font-size: 16px;
		font-size: 1rem;
	}
}

.footer-nav .top-nav li:lang(ar):after,.footer-nav .top-nav li:last-child:after {
	display: none
}

.footer-nav .top-nav li a {
	font-family: '微软雅黑',Helvetica,Arial,sans-serif;
	text-decoration: none;
	text-transform: uppercase;
	color: #ffffff;
	font-size: 16px;
	font-size: 1rem;
	-webkit-transition: border 0.3s ease-in-out 0;
	-moz-transition: border 0.3s ease-in-out 0;
	-o-transition: border 0.3s ease-in-out 0;
	transition: border 0.3s ease-in-out 0
}

.footer-nav .bottom-section {
	width: 100%;
	margin-left: auto;
	margin-right: auto;
	margin-top: 20px;
	margin-top: 1.25rem;
}


.footer-nav .copyright{
	color:#BDBDBD;	
	
	
}