html,
body {
	padding: 0;
	margin: 0;
	font-size: 16px;
}

* {
	box-sizing: border-box;
	font-family: "微软雅黑", "SF Pro Text", "Helvetica", "Arial", sans-serif;
}

.p10{padding: 10px;}
.p20{padding: 20px;}
.p30{padding: 30px;}
.p40{padding: 40px;}
.p50{padding: 50px;}
.pl10{padding-left: 10px;}
.pl20{padding-left: 20px;}
.pl30{padding-left: 30px;}
.pl40{padding-left: 40px;}
.pl50{padding-left: 50px;}
.pr10{padding-right: 10px;}
.pr20{padding-right: 20px;}
.pr30{padding-right: 30px;}
.pr40{padding-right: 40px;}
.pr50{padding-right: 50px;}
.pt10{padding-top: 10px;}
.pt20{padding-top: 20px;}
.pt30{padding-top: 30px;}
.pt40{padding-top: 40px;}
.pt50{padding-top: 50px;}
.pb10{padding-bottom: 10px;}
.pb20{padding-bottom: 20px;}
.pb30{padding-bottom: 30px;}
.pb40{padding-bottom: 40px;}
.pb50{padding-bottom: 50px;}
.m10{margin: 10px;}
.m20{margin: 20px;}
.m30{margin: 30px;}
.m40{margin: 40px;}
.m50{margin: 50px;}
.ml10{margin-left: 10px;}
.ml20{margin-left: 20px;}
.ml30{margin-left: 30px;}
.ml40{margin-left: 40px;}
.ml50{margin-left: 50px;}
.mr10{margin-right: 10px;}
.mr20{margin-right: 20px;}
.mr30{margin-right: 30px;}
.mr40{margin-right: 40px;}
.mr50{margin-right: 50px;}
.mt10{margin-top: 10px;}
.mt20{margin-top: 20px;}
.mt30{margin-top: 30px;}
.mt40{margin-top: 40px;}
.mt50{margin-top: 50px;}
.mb10{margin-bottom: 10px;}
.mb20{margin-bottom: 20px;}
.mb30{margin-bottom: 30px;}
.mb40{margin-bottom: 40px;}
.mb50{margin-bottom: 50px;}
.f12{font-size: 12px;}
.f14{font-size: 14px;}
.f16{font-size: 16px;}
.f18{font-size: 18px;}
.f20{font-size: 20px;}
.f22{font-size: 22px;}
.f24{font-size: 24px;}
.f26{font-size: 26px;}
.f28{font-size: 28px;}
.f30{font-size: 30px;}