body {
            margin: 0;
            padding: 0;
        }
        /* 视频背景样式 */
        #fullscreen-video {
            position: fixed; /* 固定视频位置，不随滚动变化 */
            top: 50%;
            left: 50%;
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto;
            z-index: -1; /* 置于底层，不遮挡内容 */
            transform: translate(-50%, -50%); /* 居中视频 */
        }


div{
	text-align:center;
	color:#ffffff;
	position:relative;
	top:11rem;
}

h1{
	font-family: "Arial","Microsoft YaHei","黑体","宋体",sans-serif;
	letter-spacing: 0.2rem;
	font-size:2.1rem;

}
span {
	
    letter-spacing: 0.2rem;
    font-size: 0.9rem;
    line-height: 2;
}
.footer {
    position: absolute;
    bottom: 0.1%;
    text-align: center;
    width: 99%;
	color:#eeeeee
}
#copyright {
	
	letter-spacing: 0.2rem;
	font-size: 0.25rem;
	opacity: 0.75;
	}