html,body{ margin: 0;padding: 0; }
a{ text-decoration: none; }

/*盒模型*/
.wa{ width: 100%; }
.bb{ box-sizing: border-box; }
.fl{ float: left; }
.fr{ float: right; }
.d_b{ display: block; }
.d_f{ display: flex; }
.d_f_a{ display: flex;justify-content: space-around;  }
.d_f_b{ display: flex;justify-content: space-between; }
.d_f_ic{
	display: flex;
	align-items: center;
}
.o_h{ overflow: hidden; }
.m0_a{ margin: 0 auto; }
.mr20{ margin-right: 20px; }
.br_h{ border-radius: 50%; }

/*位置*/
.pos_f{ position: fixed; }
.pos_r{ position: relative; }
.t0{ top: 0; }
.l0{ left: 0; }
.r0{ right: 0; }
.b0{ bottom: 0; }

/*颜色*/
.col_f{ color: #fff; }
.col_35{ color: #353535; }

/*字体*/
.fwb{ font-weight: bold; }
.tac{ text-align: center; }
.tar{ text-align: right; }
/*不同字数文字同宽*/
.tal_j{
	text-align: justify;
	text-align-last: justify;
}

/*鼠标*/
.cp{ cursor: pointer; }

/*通用*/
.show{ display: block; }
.hide{ display: none; }