* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: MiSans;
}

li {
	list-style: none;
}

a {
	text-decoration: none;
	list-style: none;
}

div {
	display: block;
}

img {
	display: block;
	user-select: none;
	-webkit-user-drag: none;
}

.main {
	min-height: 100vh;
	height: 100%;
	background: rgb(12, 14, 21);
}

.app-main {
	min-width: 100%;
}

.container {
	font-family: MiSans;
}

.banner {
	position: relative;
}

.banner .banner-img {
	width: 100%;
	height: 400px;
}

.banner .title {
	color: #f5f6f8;
	font-weight: 600;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
}

.flex {
	display: flex;
}

.flex-wrap {
	flex-wrap: wrap;
}

.flex-space {
	justify-content: space-between;
}

.flex-column {
	flex-direction: column;
}

.flex-center {
	justify-content: center;
	align-items: center;
}




@media screen and (min-width: 640px) {
	.banner {
		position: relative;
		height: 400px;
		overflow: hidden;
	}

	.banner .banner-img {
		height: 400px;
		width: 100%;
		min-width: 1920px;
		position: absolute;
		top: 0;
		left: 50%;
		transform: translate(-50%);
	}

	.banner .title {
		font-size: 54px;
	}

	.content {
		width: 640px;
		margin: 0 auto;
		padding: 80px 60px;
		box-sizing: border-box;
		background: #FFFFFF;
		box-shadow: 0 10px 40px #000d3714;
		border-radius: 4px;
		transform: translateY(-50px);
	}

	.brief {
		display: block;
		text-align: center;
	}

	.brief .left {
		min-width: 460px;
		margin: 0 auto;
	}

	.brief .brief-title {
		font-size: 40px;
		font-weight: 700;
		color: #131620;
	}

	.brief .brief-subtitle {
		font-size: 24px;
		font-weight: 700;
		color: #e7e7e8;
	}

	.brief .left .desc {
		font-size: 16px;
		font-weight: 400;
		color: #131620;
		line-height: 30px;
		text-align: justify;
		margin-top: 50px;
	}

	.brief .right {
		width: 100%;
	}

	.brief .right .company-img {
		width: 460px;
		margin: 50px auto 0;
	}

	.brief {
		display: block;
		text-align: center;
	}

	.bottom {
		width: 640px;
		margin: 0 auto 50px;
		font-size: 16px;
		font-weight: 400;
		color: #fff;
		line-height: 30px;
		text-align: justify;
	}

	.brief .brief-title {
		font-size: 40px;
		font-weight: 700;
		color: #131620;
	}

	.brief .brief-subtitle {
		font-size: 24px;
		font-weight: 700;
		color: #e7e7e8;
	}

	.bottom .brief-subtitle {
		margin-bottom: 30px;
		margin-top: 20px;
		color: #25272d !important;
	}

	.bottom .html {
		text-align: justify;
		color: #fff;
	}

	.bottom .img-list {
		margin: 30px 0 10px;
	}

	.bottom .img-list .about-img {
		width: calc(50% - 10px);
		margin-bottom: 20px;
	}

	.bottom .html {
		text-align: justify;
		color: #fff;
	}
}

@media screen and (min-width: 1200px) {
	.content {
		width: 1200px;
		transform: translateY(-60px);
	}

	.brief {
		display: flex;
	}

	.brief .left {
		margin: 0;
		width: 460px;
	}

	.brief .right {
		width: 560px;
	}

	.brief .right .company-img {
		width: 100%;
		margin-left: 60px;
	}

	.brief {
		display: flex;
	}

	.bottom {
		width: 1200px;
		text-align: center;
		display: block;
	}

	.bottom .brief-title {
		color: #fff;
	}

	.bottom .img-list .about-img {
		width: calc(25% - 12px);
	}
}

@media screen and (min-width: 640px) and (max-width: 1660px) {
	.app-main {
		min-height: calc(100vh - 208px);
	}
}

@media screen and (max-width: 640px) {
	.app-main {
		min-height: calc(100vh - 3.54rem);
	}

	.banner img {
		height: 2.56rem;
	}

	.banner .title {
		font-size: .51rem;
	}

	.content {
		width: calc(100vw - 0.76rem);
		margin: 0 auto;
		padding: 0.64rem 0.34rem;
		box-sizing: border-box;
		background: #FFFFFF;
		box-shadow: 0 0.05rem 0.22rem #000d3714;
		border-radius: 0.02rem;
		transform: translateY(-0.76rem);
	}

	.brief .brief-title {
		font-size: .5rem;
		font-weight: 700;
		color: #131620;
		text-align: center;
	}

	.brief .brief-subtitle {
		font-size: .3rem;
		font-weight: 700;
		color: #ededee;
		margin-top: 0.1rem;
		text-align: center;
	}

	.brief .desc {
		font-size: .25rem;
		font-weight: 400;
		color: #131620;
		line-height: .46rem;
		text-align: justify;
		margin-top: 0.5rem;
	}

	.brief .right {
		width: 100%;
	}

	.brief .right .company-img {
		width: 100%;
		margin-top: 0.38rem;
	}

	.bottom {
		width: calc(100vw - 0.76rem);
		margin: 0 auto;
		padding: 0.64rem 0.34rem;
		box-sizing: border-box;
		font-size: .25rem;
		font-weight: 400;
		color: #fff;
		line-height: .46rem;
		text-align: justify;
	}

	.brief .brief-title {
		font-size: .5rem;
		font-weight: 700;
		color: #131620;
		text-align: center;
	}

	.bottom .brief-title {
		color: #fff;
	}

	.brief .brief-subtitle {
		font-size: .3rem;
		font-weight: 700;
		color: #ededee;
		margin-top: 0.1rem;
		text-align: center;
	}

	.bottom .brief-subtitle {
		margin-bottom: 0.2rem;
		margin-top: 0.1rem;
		color: #25272d;
	}

	.bottom .html {
		text-align: justify;
		color: #fff;
	}

	.bottom .img-list {
		margin: 0.5rem 0 0.24rem;
	}

	.bottom .img-list .about-img {
		width: calc(50% - 0.13rem);
		margin-bottom: 0.26rem;
	}

	.bottom .html {
		text-align: justify;
		color: #fff;
	}
}