* {
	margin: 0;
	padding: 0;
}

.c1 {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 15px;
}

.logo {
	width: 156px;
}

.lang {
	display: flex;
	align-items: center;
	justify-content: center;
	height: 45px;
	/* 这个可以根据实际需要调整 */
}
.lang select{
	border: none;
	font-size: 15px;
} 

.c2 p:nth-child(1) {
	margin: 0 auto;
	width: 90%;
	margin-top: 56px;
	font-size: 33px;
	text-align: center;
	color: #1a202c;
	font-weight: 700;
	line-height: 40px;
	letter-spacing: .06px;
}

.c2 p:nth-child(2) {
	text-align: center;
	margin: 14px 0 32px;
	font-size: 16px;
	line-height: 21px;
	padding: 15px;
}

.c3 {
	display: flex;
	justify-content: center;
}

.downloadbtn {
	background-color: black;
	padding: 10px;
	border-radius: 10px;
	display: flex;
	justify-content: space-between;
	padding-top: 5px;
	padding-bottom: 5px;
}

.downloadbtn p:nth-child(1) {
	font-size: 11px;
	color: #d5d8db;
}

.downloadbtn p:nth-child(2) {
	font-size: 14px;
	font-weight: 500;
	color: #fff;
}

.downloadbtn img {
	width: 32px;
	height: 32px;
	margin-right: 10px;
}

.dt {
	width: 100%;
	margin: 0 auto;
}

.c4 {
	padding-top: 20px;
	background: #3d8cfe;

}