/* --------------------------------Modules - reusable parts of our design-------------------------------- */
.cd-container {
	width: 90%;
	max-width: 768px;
	height: 3000px;
	margin: 2em auto;
	display: block
}

.cd-container::after {
	/* clearfix */
	content: '';
	display: table;
	clear: both;
}

/* --------------------------------Main components-------------------------------- */
header {
	background: #5c4751;
	height: 100px;
	text-align: center;
}

header h1 {
	font-size: 20px;
	font-size: 1.25rem;
	font-weight: bold;
	font-family: "Open Sans", sans-serif;
	text-transform: uppercase;
	font-weight: bold;
	padding-top: 1.6em;
	margin-bottom: .2em;
}

header p {
	font-size: 13px;
	font-size: 0.8125rem;
	color: #957484;
}

@media only screen and (min-width: 1024px) {
	header {
		height: 200px;
	}

	header h1 {
		font-size: 30px;
		font-size: 1.875rem;
		padding-top: 2.6em;
	}
}

main p {
	font-size: 14px;
	font-size: 1rem;
	line-height: 22px;
}

@media only screen and (min-width: 1024px) {
	main p {
		font-size: 14px;
		font-size: 1rem;
	}
}

.cd-top {
	display: inline-block;
	height: 40px;
	width: 40px;
	position: fixed;
	bottom: 40px;
	right: 10px;
	box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
	/* image replacement properties */
	overflow: hidden;
	text-indent: 100%;
	white-space: nowrap;
	background: rgba(232, 98, 86, 0.8) url(../images/cd-top-arrow.svg) no-repeat center 50%;
	visibility: hidden;
	opacity: 0;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

.cd-top.cd-is-visible {
	/* the button becomes visible */
	visibility: visible;
	opacity: 1;
}

.cd-top.cd-fade-out {
	/* 如果用户继续向下滚动,这个按钮的透明度会变得更低 */
	opacity: .5;
}

.no-touch .cd-top:hover {
	background-color: #e86256;
	opacity: 1;
}

@media only screen and (min-width: 768px) {
	.cd-top {
		right: 20px;
		bottom: 20px;
	}
}

@media only screen and (min-width: 1024px) {
	.cd-top {
		height: 60px;
		width: 60px;
		right: 30px;
		bottom: 30px;
	}
}