.f {
	width:120px; 
	height:50px; 
	background:#fff; 
	position:fixed; 
	right:30px; 
	top:180px; 
	margin:0px;
	border-radius:20px;
	box-shadow: 1px 1px 5px rgba(0,0,0,.5);
}
.f:hover{
	background:#618ccc; 
	cursor:pointer;
	transform: scale(1.1);
	transition: all 0.5s ease-in-out;
}
input[type="button"] {
	font-size: 16px;
	z-index: 1;
}
.intro{
	background-color: #ffffff;
}
.intro .text{
	width: 100%;
	text-align: center;
	padding-top: 8vh;
	position: relative;
	z-index: 1;
	animation: appear 1s;
}
.intro img{
	width: 100%;
	animation: showup 1s;
}
.channel img{
	width: 100%;
}
.channel .text{
	width: 100%;
	text-align: center;
	position: absolute;
	top: 0;
	padding: 5px 0;
	color: rgb(0, 0, 0);
}
.channel img{
	width: 100%;
	animation: showup 1s;
}
.distribute .text{
	width: 35%;
	position: absolute;
	color: rgb(0, 0, 0);
	top: 25%;
	left: 10%;
}
@keyframes showup{
	from{opacity: 0; transform: scale(0.95);}
	to{opacity: 1; transform: scale(1);}
}
@keyframes appear
{
	from {opacity: 0}
	to {opacity: 1}
}
.intro h1{
	line-height: 0px;
}
.intro h2{
	color: #00a9ec;
}
.application{
	background: #fff;
	padding: 10px;
}
.application .roll{
	background-image: url(/images/products/u-mooc/roll.jpg);
	background-size: cover;
	height: 30vw;
	max-height: 450px;
	width: 100%;
	animation: backgroundshift 50s infinite linear;
}
.application .text{
	padding: 6px;
}
@media(max-width:800px){
	.channel,
	.channel .text{
		position: relative;
		padding: 1px 16px;
		background: none;
	}
	.application{
		padding: 4px;
	}
}
.text.center{
	width: 100%;
	max-width: 800px;
	margin: 0 auto;
	text-align: center;
}
.features{
	background: #fff;
	padding: 8px 16px;
}
.features img{
	width: 100%;
	max-width: 2500px;
	margin: 0 auto;
}
.data{
	background: #fff;
	padding: 8px 16px;
}
.data img{
	width: 100%;
	max-width: 2500px;
	margin: 0 auto;
}
.Administration{
	display: flex;
	align-items: center;
	justify-content: space-between;
	background: #ffffff;
	padding: 0;
}
.Administration img{
	width: 60%;
	max-width: 788px;
}
.Administration .text{
	width: 40%;
	max-width: 500px;
	padding: 16px;
	margin: 0 auto;
}
.manage{
	background: #fff;
	display: flex;
	justify-content: space-around;
	align-items: center;
	min-height: 500px;
}
.manage .text{
	width: 40%;
	max-width: 600px;
	padding: 16px;
}
.manage img{
	width: 60%;
}
.more{
	background: #345;
	color: #fff;
	padding: 8px 16px 24px 16px;
}
.more>h1{
	text-align: center;
}
.more main{
	width: 100%;
	max-width: 1200px;
	margin: 0 auto;
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
}
.more div{
	width: calc(33% - 16px);
}
.more main h1{
	font-size: 1.6em;
}
@media(max-width: 800px){
	.Administration{
		flex-wrap: wrap-reverse;
		padding: 8px;
	}
	.manage{
		flex-wrap: wrap;
		padding: 8px;
	}
	.Administration>*, .manage>*{
		width: 100% !important;
		margin: 0 auto;
		padding: 0;
		text-align: center;
	}
	.Administration .text, .manage .text{
		max-width: none
	
	}
	.more div{
		width: calc(50% - 16px);
	}
	.more div h1{
		font-size: 1.4em
	}
	.distribute{
		background: rgb(255, 255, 255);
	}
    .distribute .text{
		width: 100%;
		position: static;
		text-shadow: none;
		padding: 16px;
		text-align: center;
		margin-top: -20px;
	}
}
@media(max-width: 500px){
	.more div{
		width: 100%;
		text-align: center;
	}
	
input[type="button"] {
	z-index: -1;
	font-size: 16px;
}
}