IE6-IE11,Firefox/Safari/Opera/Chrome目前最常见的是*html *前缀只对IE6生效*+html *+前缀只对IE7生效@media screen9{...}只对IE6/7生效@media screen {body { background: red; }}只对IE8有效@media screen,screen9{body { background: blue; }}只对IE6/7/8有效@media screen {body { background: green; }} 只对IE8/9/10有效@media screen and (min-width:0 ) {body { background: gray; }} 只对IE9/10有效@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {body { background: orange; }} 只对IE10有效IE6，识别_，识别*，不识别!importantIE7，识别*，识别!important，不识别_Firefox，识别!important，不识别_，不识别*“-″减号是IE6专有的hack“9″ IE6/IE7/IE8/IE9/IE10都生效“ ″ IE8/IE9/IE10都生效，是IE8/9/10的hack“9 ″ 只对IE9/IE10生效，是IE9/10的hack
