html, body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
	overflow-x: scroll;
}

*, *::before, *::after {
    box-sizing: inherit;
}
.dongshizhangzhiciwenben,.fazhanshijianxian, .dongshizhangzhici,.fazhanlicheng,.yuangongzhufu,.yuangongfengcai {
    display: flex;
    flex-direction: column; /* 将主轴方向改为垂直方向 */
    justify-content: center; /* 水平居中 */
    align-items: center; /* 垂直居中 */
    position: relative;
    width: 100vw;
    height: 84.2592vh/*910px即84.2592vh*/
}
.dongshizhangzhiciwenben{
	width:100vw;
	height:84.2592vh;
    background-image: url("../images/hero/20th-1.jpg");
    background-size: 100vw 84.2592vh;
	background-position:center center;
}
.fazhanshijianxian{
	width:100vw;
	height:84.2592vh;
    background-image: url("../images/hero/20th-2.jpg");
    background-size: 100vw 84.2592vh;
		background-position:center center;
}

.fazhanlicheng{
	width:100vw;
	height:84.2592vh;
    background-image: url("../images/hero/20th-3.jpg");
    background-size: 100vw 84.2592vh;
		background-position:center center;
}
.yuangongzhufu{
	width:100vw;
	height:84.2592vh;
    background-image: url("../images/hero/20th-4.jpg");
    background-size: 100vw 84.2592vh;
	background-position:center center;
}
.dongshizhangzhici{
	width:100vw;
	height:84.2592vh;
    background-image: url("../images/hero/20th-5.jpg");
    background-size: 100vw 84.2592vh;
	background-position:center center;
}

.yuangongfengcai{
	width:100vw;
	height:84.2592vh;
    background-image: url("../images/hero/20th-6.jpg");
    background-size: 100vw 84.2592vh;
	background-position:center center;
}
.videoplay{
    width:41.67vw;
    height:41.67vh;
}
#myVideo1,#myVideo2,#myVideo3,#myVideo4,#myVideo5{
    width:41.67vw;
    height:41.67vh;
}
.videotitle{
    width:53.33vw;
    height:10vh;
    line-height: 3vh;
    font-size: 20px;
    font-weight: bold;
    color:#ff0000;
}
.videotitle span{
    display: block;
}