.main {
	width: 100%;
	overflow-x: hidden;
	min-width: 1200px;
	background: #1a1b23;
}

.banner {
	width: 100%;
	height: 600px;
	background: url(../2020_a_images/banner.png) no-repeat center center;
	background-size: cover;
}


nav li:first-child {
	margin-left: 0;
}


.fun-wrapper {
	height: 1000px;
	color: #fff;
	font-size: 50px;
}

.active {
	color: #4fbbff;
	border-bottom: 3px solid #4fbbff;
}


.nav-height {
	position: relative;
	height: 50px;
}

.nav-wrap {
	width: 100%;
	height: 69px;
	border-bottom: 1px solid #2c2e3b;
	background: #1a1b23;
}

.nav-wrap.navFix {
	position: fixed;
	top: 0;
	left: 0;
	box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
	border-bottom: 1px solid #2c2e3b;
	z-index: 99999;
}

.nav-wrap ul {
	width: 580px;
	margin: 0 auto;
}

.nav-wrap.navFix ul {
	border-bottom: 0;
}

.nav-wrap li {
	height: 69px;
	line-height: 69px;
	float: left;
	font-size: 18px;
	margin-left: 40px;
}

.nav-wrap li a {
	display: block;
	padding: 0 20px;
	font-size: 18px;
	color: #fff;
	text-decoration: none;
}

.nav-wrap li a:hover {
	color: #4680d1;
}

.nav-wrap li a.active {
	border-bottom: 2px solid #4680d1;
	color: #4680d1;
}

.section-content {
	width: 1200px;
	margin: auto;
	overflow: hidden;
}

.section-header {
	width: 430px;
	height: 80px;
	margin: 80px auto 100px;
}

.section1-bg {
	background: url(../2020_a_images/fun.png) no-repeat center center;
	background-size: fit;
}

.section2-bg {
	background: url(../2020_a_images/jiegou.png) no-repeat center center;
	background-size: fit;
}

.section3-bg {
	background: url(../2020_a_images/youshi.png) no-repeat center center;
	background-size: fit;
}

.section4-bg {
	background: url(../2020_a_images/app.png) no-repeat center center;
	background-size: fit;
}

.section-item {
	height: 210px;
	width: 595px;
	margin-left: 10px;
	background: #1f2129;
	float: left;
	margin-bottom: 10px;
}

.section-item:first-child {
	margin-left: 0;
}

.section-item-three {
	height: 210px;
	width: 393px;
	margin-right: 10px;
	background: #1f2129;
	float: left;
	margin-bottom: 10px;
}

.section-item-three:nth-child(3),
.section-item-three:nth-child(6) {
	margin-right: 0;
}

.section-item-left {
	width: 100px;
	height: 100%;
	float: left;
}

.section-item-left img {
	width: 50px;
	height: 50px;
	margin: 42px 0 0 42px;
}

.section-item-right {
	width: 455px;
	height: 100%;
	float: left;
}
.section-item-three-right{
	width: 253px;
	height: 100%;
	float: left;
}
.section-item-title {
	margin-top: 42px;
	width: 100%;
	height: 50px;
	line-height: 50px;
	font-size: 24px;
	color: #fff;
	font-weight: bold;
}
.section-item-info{
	width: 100%;
	height: 50px;
	line-height: 25px;
	font-size: 14px;
	color: #ccc;
	margin-top: 15px;
}
.structure{
	width: 1200px;
	height: 595px;
	margin: 45px auto;
}
.advantage{
	width: 1200px;
	margin: 45px auto;
	overflow: hidden;
}
.advantage-item{
	width: 320px;
	height: 300px;
	float: left;
	margin-left: 120px;
}
.advantage-item:nth-child(1){
	margin-left: 0;
}
.advantage-item-pic{
	width: 100%;
	height: 120px;
	text-align: center;
}
.advantage-item-title{
	width: 100%;
	height: 80px;
	line-height: 80px;
	text-align: center;
	color: #fff;
	font-size: 24px;
	font-weight: bold;
}
.advantage-item-info{
	width: 100%;
	height: 88px;
	line-height: 22px;
	text-align: center;
	color: #999999;
	font-size: 12px;
	overflow: hidden;
}
._warp {
  width: 1200px;
  height: 437px;
  margin: 70px auto;
  display: flex;
}
._warp .left {
  flex: none;
  width: 600px;
  height: 100%;
  background: url(../2020_a_images/scenebg.png) no-repeat;
  background-size: cover;
  position: relative;
  overflow: hidden;
}
._warp .left::before {
  content: '';
  display: block;
  position: absolute;
  top: -40px;
  left: -40px;
  width: 0;
  height: 0;
  border: 40px solid transparent;
  border-bottom-color: #1A1B23;
  z-index: 5;
  transform: rotate(-45deg);
}
._warp .left::after {
  content: '';
  display: block;
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 0;
  height: 0;
  border: 40px solid transparent;
  border-top-color: #1A1B23;
  z-index: 5;
  transform: rotate(-45deg);
}
._warp .left .content {
  width: 588px;
  height: 424px;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  overflow: hidden;
}
/* ._warp .left .content::before {
  content: '';
  display: block;
  position: absolute;
  top: -41px;
  left: -41px;
  width: 0;
  height: 0;
  border: 40px solid transparent;
  border-bottom-color: #505262;
  z-index: 4;
  transform: rotate(-45deg);
}
._warp .left .content::after {
  content: '';
  display: block;
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 0;
  height: 0;
  border: 40px solid transparent;
  border-top-color: #505262;
  z-index: 4;
  transform: rotate(-45deg);
} */
._warp .left .content img {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
}

._warp .left .mask{
	position: absolute;
	bottom: 30px;
	left: 30px;
	width: 502px;
	height: 115px;
	z-index: 999;
}

._warp .right {
  flex: none;
  width: 620px;
  height: 380px;
  background: #21222B;
  padding: 30px 10px 0 30px;
  box-sizing: border-box;
}
._warp .right .item {
  width: 120px;
  height: 150px;
  border-radius: 4px;
  float: left;
  margin: 0 25px 25px 0;
  cursor: pointer;
  text-align: center;
  transition: 0.5s;
  position: relative;
}
._warp .right .item:hover {
  box-shadow: 0px 0px 20px 0px #888fcb;
  transform: scale(1.1);
}

._warp .right .item .type {
  position: absolute;
  bottom: 13px;
  left: 50%;
  font-size: 14px;
  transform: translate(-50%, 0);
  color: #ffffff;
  width: 100%;
}
.mask-title{
	height: 50px;
	line-height: 50px;
	width: 100%;
	color: #f0efef;
	font-size: 24px;
}
.mask-info{
	line-height: 22px;
	width: 100%;
	color: #f0efef;
	font-size: 12px;
}