jiguang

.all-IE{property:value\9;}
:root .IE-9{property:value\0/;}
.gte-IE-8{property:value\0;}
.lte-IE-7{*property:value;}
.IE-7{+property:value;}
.IE-6{_property:value;}
.not-IE{property//:value;}
@-moz-document url-prefix() { .firefox{property:value;} }
@media all and (-webkit-min-device-pixel-ratio:0) { .webkit{property:value;} }
@media all and (-webkit-min-device-pixel-ratio:10000),not all and (-webkit-min-device-pixel-ratio:0) { .opera{property:value;} }

jiguang

/* 清除浮动 */
.fix:after {
	visibility:hidden;
	display:block;
	font-size:0;
	content:" ";
	clear:both;
	height:0;
}
.clearfix {