w https://developer.mozilla.org/en-US/docs/Web/CSS/calc The calc() CSS function can be used anywhere a <length>, <frequency>, <angle>, <time>, <number>, or <integer> is required. With calc(), you can perform calculation
CSS calc() allows you to mix and match units to get real-time calculations. It's useful when you need to size elements but you have some unknown number that you have to account for.
<style type="text/css"> /* Client-specific Styles */ #outlook a{padding:0;} /* Force Outlook to provide a "view in browser" button. */ body{width:100% !important;} .ReadMsgBody{width:100%;} .ExternalClass{wid
一种是用js判断兼容性 // JS if ("CSS" in window && "supports" in window.CSS) { var support = window.CSS.supports("mix-blend-mode","difference"); support = support?"mix-blend-mode":"no-mix-blend-mode&quo