body {
	margin: 0;
	padding: 0;
	min-width: 1440px;
}

.header {
	height: 118px;
	padding: 0;
	z-index: 100;
	width: 100%;
	display: table;
	background: #f0f8ff;
}

.row {
	display: table-row;
}

.cell {
	display: table-cell;
	vertical-align: middle;
}

header {
	font-size: 38px;
	font-family: PingFangSC-Semibold, PingFang SC;
	font-weight: 600;
	color: #2b2b2b;
	line-height: 118px;
	display: inline-block;
	margin-left: 50px;
}

.nav {
	font-size: 30px;
	font-family: PingFangSC-Semibold, PingFang SC;
	font-weight: 600;
	color: #2b2b2b;
	line-height: 118px;
	display: inline-block;
}

.nav a {
	text-decoration: none;
	color: black;
}

.nav span {
	padding: 36px 50px 36px 50px;
	margin-right: 20px;
	margin-left: 20px;
}

.nav span.checked {
	color: blue;
	border-bottom: 3px solid blue;
}

.page {
	width: 100%;
	background: linear-gradient(1turn, #fff, #f0f8ff);
	padding-top: 20px;
	padding-bottom: 20px;
	position: relative;
}

.bg1 {
	top: 0;
	right: 0;
	background: url(../img/bg1.png) no-repeat 100% 0;
	background-size: 100% 100%;
	position: absolute;
	width: 784px;
	height: 751px;
}

.bg2 {
	bottom: 0;
	right: 0;
	left: auto;
	background: url(../img/bg2.png) no-repeat 100% 100%;
	background-size: 100% 100%;
	position: absolute;
	width: 120px;
	height: 278px;
}

.bg3 {
	top: 0;
	left: 0;
	background: url(../img/bg3.png) no-repeat 0 0;
	background-size: 100% 100%;
	position: absolute;
	width: 784px;
	height: 751px;
}

.bg4 {
	bottom: 0;
	left: 0;
	background: url(../img/bg4.png) no-repeat 0 100%;
	background-size: 100% 100%;
	position: absolute;
	width: 120px;
	height: 278px;
}

.app {
	padding-top: 40px;
	width: 50%;
}

.app_img {
	width: 100%;
	height: auto;
}

.aside {
	display: inline-block;
	font-size: 15px;
	color: #666;
	line-height: 28px;
}

.app_icon {
	display: inline-block;
	width: 128px;
	height: auto;
	margin-right: 32px;
}

.app_div {
	display: inline-block;
	position: relative;
	bottom: 15px;
}

.app_name {
	font-size: 56px;
	font-family: PingFangSC-Semibold, PingFang SC;
	font-weight: 600;
	color: #2d3343;
	line-height: 78px;
}

.app_name .downbtn {
	font-size: 25px;
	font-weight: 400;
	line-height: 78px;
	background-color: #0000FF;
	padding: 8px 25px;
	color: white;
	border-radius: 8px;
	margin-left: 20px;
	position: relative;
	bottom: 10px;
}

.app_name a {
	text-decoration: none;
}

.app_intro {
	font-size: 26px;
	color: #636979;
	line-height: 37px;
}

.app_info {
	max-width: 580px;
	font-size: 16px;
	color: #666;
	line-height: 28px;
	margin-top: 46px;
}

#company-intro-name {
	z-index: 100;
	padding-top: 3em;
	padding-left: 3em;
	font-family: PingFangSC-Semibold;
	font-size: 2.5em;
	line-height: 1.4em;
}

#company-intro-text {
	width: 40em;
	padding-top: 2em;
	padding-left: 6em;
	color: #2f3440;
	font-size: 1.25em;
	line-height: 2.2em;
}

#company-intro-img {
	display: inline-block;
	width: 31.65em;
	height: 22em;
	right: 10em;
	background-image: url(../img/about-bg.png);
	background-repeat: no-repeat;
	background-size: 100% 100%;
}