body{
	background-image: url("g1c4learning.jpeg");
	background-size: cover;
	background-position: center bottom;
	background-attachment: fixed;
	background-repeat: no-repeat;
}
#distanceTo{
	position: absolute;
	left: 7.5%;
	text-align: left;
	top: 12.5%;
	color: white;
	text-shadow: 1px 2px 2px rgba(127,127,127,0.8);
}
#timeClock{
	position: absolute;
	right: 7.5%;
	text-align: right;
	top: 12.5%;
	color: white;
	text-shadow: 1px 2px 4px rgba(127,127,127,0.8);
}
.main-bgpic-cover{
	position: absolute;
	width: 100%;
	height: 40%;
	bottom: 0;
	background-color: rgba(255,255,255,0.9);
	overflow: hidden;
}
.main-bgpic-cover p{
	top: 100%;
	position: absolute;
	font-size: 12px;
	line-height: 24px;
	color: gray;
	text-align: center;
	animation: flying100Announcement 45s infinite linear;
}
@keyframes flying100Announcement{
	from{top: 100%;}
	to{top: -640px}
}

.navigationTable{
	position: absolute;
	top: calc(60% - 144px);
	margin: 0 auto;
	left: calc(50% - 240px);		/* 此处的 left 数值应由下面的 width 手动更改*/
	width: 480px;
	background-color: rgba(245,245,245,0.8);
	padding: 24px;
	border: #aaaaaa solid 1px;
	border-radius: 6px;
	box-shadow: 2px 4px 12px rgba(191,191,191,0.6);
}
.navigationTable-pic{
	text-align: center;
}
.navigationTable-pic img{
	width: 72px;
	height: 72px;
}
.navigationTable-text{
	text-align: center;
}
.navigationTable-text a{
	display: inline-block;
	font-size: 16px;
	height: 16px;
	text-decoration: none;
	color: #333333;
}

#chalk{
	position: absolute;
	width: 120px;
	height: 80px;
	left: calc(25% + 30px);
	transform: translateX(-50%);
	bottom: calc(5% + 20px);
	background-image: url("chalk.png");
	background-size: 100%;
	background-repeat: no-repeat;
}
#blackboard{
	position: absolute;
	width: 160px;
	height: 120px;
	right: 25%;
	transform: translateX(50%);
	bottom: 5%;
	background-image: url("blackboard.png");
	background-size: 100%;
	background-repeat: no-repeat;
}
#entryAnimation1{
	position: absolute;
	top: 0;
	width: 100%;
	height: 60%;
	background-color: #f7f7f7;
	z-index: 200;
}
#entryAnimation1 h1{			/* 梦想，不惧遥远 */
	/*display: block;*/
	position: absolute;
	top: 25%;
	width: 100%;
	font-size: 64px;
	font-weight: bold;
	text-align: center;
}
#entryAnimation1 span{			/* 滑动解锁 */
	/*display: block;*/
	position: absolute;
	bottom: calc(5% + 48px);
	width: 100%;
	font-size: 28px;
	color: gray;
	text-align: center;
}
#entryAnimation2{
	position: absolute;
	bottom: 0;
	width: 100%;
	height: 40%;
	background-color: #f7f7f7;
	z-index: 200;
}