web端，背景图

Question

一张背景图 宽度为100%，高度为固定值100px，如何应对宽屏手机导致图片宽度拉伸变得模糊

Answer 1

方案一：    图片原图高清：宽度依旧100%，height：auto；即可适用于 图片自适应，且跨平台方案二：    图片清晰度有限：用媒体查询    @media  screen and (max-width: 500px) {    //原图片最大宽度    img {        width：100%；    }}@media  screen and (min-width: 501px) and (max-width: 1980px){    //(原图片最大宽度+1)and (最大屏幕宽度)    img {        width：（原图片最大固定宽度）；        margin：auto；//图片居中        }}

Answer 2

根据不同的分辨率设置不同的图片

Answer 3

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