프로모션 관련 css 수정

src/main/webapp/ux/mo/css/common_m.css

@@ -1140,7 +1140,7 @@ button.alertCls {-webkit-appearance: none;padding: 0;cursor: pointer;background:
 .foldGroup.case2 .fold_answer{padding-top:1.8rem;}
 
 .fold_head {padding: 0; border-bottom: 0.1rem solid transparent;}
-.fold_head::after {content: ''; position: absolute; display: inline-block; top:50%; left: auto; right:2.0rem; transform: translateY(-50%);  width:1.3rem; height:0.7rem; background: url('//image.istyle24.com/Style24/images/mo/ico_fold_arrow1.png'); background-repeat: no-repeat; background-position: 0 100%; background-size: cover;}
+.fold_head::after {content: ''; position: absolute; display: inline-block; top:50%; left: auto; right:2.0rem; transform: translateY(-50%);  width:1.3rem; height:0.7rem; background: url('//image.istyle24.com/Style24/images/mo/ico_fold_arrow1.png'); background-repeat: no-repeat; background-position: 0 100%; background-size: cover;z-index:-1;}
 .fold_head.on::after {background-repeat: no-repeat; background-position:0 0%;}
 .fold_head a::after ,
 .fold_head a div::after,