html,
body {
	width: 100vw;
	margin: 0px;
	padding: 0px;
	font-size: 1em;
}

.container {
	height: 100vh;
	overflow-y: auto;
	position: relative;
	background: #E9F1FF;
}

.dialogDiv {
	width: 300px;
	height: 60px;
	font-size: 18px;
	font-weight: 400;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 5px;
	box-shadow: 0px 0px 3px 1px #ccc;
	background: #fff;
	position: absolute;
	left: 50%;
	top: 200px;
	margin-left: -150px;
	z-index: 999;
}

.header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	font-weight: bold;
	color: #3783F6;
	padding: 15px 30px;
}

.header .title {
	font-size: 24px;
	font-family: Microsoft YaHei;
	position: relative;
}

.header .title-right {
	display: flex;
	align-items: center;
}

.header>.title-right>.item {
	margin-left: 20px;
	position: relative;
	line-height: 60px;
	cursor: pointer;
}

.header>.title-right>.item:hover>img {
	display: inline-block;
}

.header>.title-right>.item>img, .brower-download>ul {
	z-index: 1;
	position: absolute;
	top: 60px;
	right: 0;
	display: none;
	border-radius: 4px;
	box-shadow: 0 0 20px 20px rgba(0, 0, 0, 0.1);
}

.brower-download:hover>ul {
	display: block;
}
.brower-download>ul {
	list-style: none;
	background: #fff;
	width: 100%;
	padding: 5px;
    margin: 0;
	text-align: center;
}

.brower-download>ul>li {
	line-height: 30px;
}
.brower-download>ul>li>a {
	color: #333;
	text-decoration:none;
}

.brower-download>ul>li>a:hover {
	color: #3783F6;
}

.nav-box {
	padding: 0 30px;
	margin: 0px auto;
	text-align: center;
}

.nav-item {
	width: 340px;
	height: 200px;
	text-align: center;
	margin-bottom: 25px;
	cursor: pointer;
}

.item-title {
	width: 163px;
	font-size: 27px;
	line-height: 30px;
	display: block;
	text-align: left;
	font-family: Microsoft YaHei;
	font-weight: bold;
	color: #FFF;
	margin-top: 28px;
	margin-left: 30px;
}

.flex-box {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
}

.nav-item:nth-child(1) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/english.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(2) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/mathematics.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(3) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/physics.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(4) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/chemistry.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(5) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/chinese.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(6) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/science.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(7) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/history.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(8) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/biology.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(9) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/geography.png') no-repeat center;
	background-size: 100% 100%;
}

.nav-item:nth-child(10) {
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/politics.png') no-repeat center;
	background-size: 100% 100%;
}



.nav-item:nth-child(5) {
	// opacity: 0.4;
}

.foot-box {
	width: 95%;
	height: 30.46vh;
	margin: 0px auto;
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/bottom-bg.png') no-repeat center;
	background-size: 100% 100%;
	display: flex;
	justify-content: center;
}

.img-box {
	width: 100px;
	height: 100px;
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/yixue-er.jpg') no-repeat center;
	background-size: 100% 100%;
}

.img-police {
	margin:0 6px 0 20px;
	width: 18px;
	height: 18px;
	background: url('https://skr-question-img.oss-cn-hangzhou.aliyuncs.com/xtjg/skr-home/images/police.png') no-repeat center;
	background-size: 100% 100%;
}

.contact {
	margin: 10px 0;
}

.extra-info {
	margin-top: 14px;
}