.bnBase {width:100% ; height:auto; background:rgba(0,0,0,0.0); overflow: hidden;}
.bnBase .bn { margin: 0 auto; width:1200px;height:　auto; text-align: center;background:rgba(0,0,0,0.0);overflow: hidden;}
.bnBase .bn a { float:left; text-align: center; }
.bnBase .bn a img { width:100%; }
.bnBase .bn a:nth-child(1) { width:53%;}
.bnBase .bn a:nth-child(2) { margin: 2% 2% 0px 2%; padding: 10px 0 ; width:43%;}
.bnBase .bn a:nth-child(3) { margin: 1% 2% 0px 2%; padding: 10px 0 ; width:43%;}
.bnBase .bn a:nth-child(4) { margin: 1% 2% 0px 2%; padding: 10px 0 ; width:43%;}

.bnBase .bn a:nth-child(2):hover {box-shadow: 0 2px 0 #aaa}
.bnBase .bn a:nth-child(3):hover {box-shadow: 0 2px 0 #aaa}
.bnBase .bn a:nth-child(4):hover {box-shadow: 0 2px 0 #aaa}

.bnBase .bn .botton { display:block; margin:0; border-radius: 40px; font: bold 26px/26px "微軟正黑體"; color:#fff; text-decoration: none; background:#00c7d9;}
.bnBase .bn .botton em {font: 14px/16px "微軟正黑體"; color:#fefefe;}

@media only screen and (max-width: 1199px){
.bnBase .bn { margin: 0 auto; width:100%;height:　auto; text-align: center;background:rgba(0,0,0,0.0);}
.bnBase .bn a img { width:90%; margin: 5%;}	
}

@media only screen and (max-width: 768px){
.bnBase {width:100% ; height:auto; background:rgba(0,0,0,0.0);}
.bnBase .bn { margin: 0 auto; width:100%;height:auto; text-align: center;background:rgba(0,0,0,0.0);}
.bnBase .bn a { float:none; text-align: center; }

.bnBase .bn a:nth-child(1) { width:100%;}
.bnBase .bn a:nth-child(2) { margin:0; padding: 2% 0 ; width:100%;}
.bnBase .bn a:nth-child(3) { margin:1% 0; padding: 2% 0 ; width:100%;}
.bnBase .bn a:nth-child(4) { margin:1% 0; padding: 2% 0 ; width:100%;}

.bnBase .bn .botton { display:block; margin:0; border-radius: 40px; font: bold 30px/30px "微軟正黑體"; color:#fff; text-decoration: none; background:#00c7d9;}
.bnBase .bn .botton em {font: 18px/18px "微軟正黑體"; color:#fefefe;}
	
}

@media only screen and (max-width: 375px){

.bnBase .bn .botton { display:block; margin:0; border-radius: 40px; font: bold 28px/28px "微軟正黑體"; color:#fff; text-decoration: none; background:#00c7d9;}
.bnBase .bn .botton em {font: 14px/14px "微軟正黑體"; color:#fefefe;}
	
}