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rem的用法_html/css_WEB-ITnose

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Release: 2016-06-24 11:36:22
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rem 是css3中的属性,ie8下不兼容。
rem是相对于根元素  这就意味着我们只需要在 根目录加入以下css代码。 默认单位为16px,我们需要在用rem的时候除以16  就是rem的值。  比如字体是20px,

 20÷16 = 1.25rem即可。

@media only screen and (max-width: 320px) {    html {        font-size: 16px;    }}@media only screen and (min-width: 321px) and (max-width: 360px) {    html {        font-size: 18px;    }}@media only screen and (min-width: 361px) and (max-width: 375px) {    html {        font-size: 18.75px;    }}@media only screen and (min-width: 376px) and (max-width: 384px) {    html {        font-size: 19px;    }}@media only screen and (min-width: 385px) and (max-width: 413px) {    html {        font-size: 19px;    }}@media only screen and (min-width: 414px) and (max-width: 480px) {    html {        font-size: 20.7px;    }}@media only screen and (min-width: 481px) and (max-width: 540px) {    html {        font-size: 27px;    }}
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