css自适应各种格式背景图

body {
			position: relative;
			background-color: #eee;
			background-image: url(链接);
			background-size: 100%;
			max-width: 580px;
			margin: 0 auto;
		}

 直接在源代码中插入如下

style="background-repeat:no-repeat; background-attachment:fixed;background-size:cover;background-image: url(链接);">

放在<style>标签即可

<style>
      body {
        position:relative;
        background-color: #eee;
        background-image: url(链接);
        background-size: 100%;
        max-width: 580px;
        margin: 0 auto;
      }
    </style>