.helpCenter{width: 100%;height:640px; position:relative;}
.helpCenter .h1{font-size:55px; color:#fff; position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);}
.HC .pioneer_wen{ margin-bottom:50px; cursor:pointer;}
.HC .pioneer_wen:last-child{margin:0;}
.pioneer_img.HC{min-height:500px;}
@media screen and (max-width: 1594px) and (min-width: 1435px){
	.helpCenter{height:550px;}
	.helpCenter .h1{font-size:44px;}
}
@media screen and (max-width: 1434px) and (min-width: 1275px){
	.helpCenter{height:502px;}
	.helpCenter .h1{font-size:36px;}
}
@media screen and (max-width: 1274px) and (min-width: 1024px){
	.helpCenter{height:410px;}
	.helpCenter .h1{font-size:30px;}
}
@media screen and (max-width: 1023px) and (min-width: 768px){
	.helpCenter{height:337px;}
	.helpCenter .h1{font-size:24px;}
}
@media screen and (max-width: 767px){
	.helpCenter{height:200px;}
	.helpCenter .h1{font-size:18px;}
	.pioneer_zuo.HC{width:100%;}
	.pioneer_img.HC{min-height:auto;}
	.HC .pioneer_wen{ margin-bottom:20px; 
}