html {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
	background-image: url('/img/bg.jpg');
	background-repeat: no-repeat;
	background-position: center center;
	background-size: contain;
	/* 可选：固定背景，防止滚动时图片移动 */
	background-attachment: fixed;
	box-sizing: border-box;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}