@media screen and (max-width:640px) {
    body {width: 100%;}
	/*top*/
    .top_box{width:100%;}
    .top_left{padding-top:0px;width:120px;height:auto;}
    .top_right_bottom p{width:200px;height:90px;line-height:90px;font-size:16px;text-align:right;}
	
	/*banner*/
    .ba img{margin-top:-24px;}
	/*字*/
    .index p{font-size:20px;margin-top: 10px;}
    .index span{font-size:16px;}
	/*

    .about{width:100%;height: auto;}
    .about img{margin-top:20px;}*/
	.about1{width:100%;height: auto;}
	.about1_box{margin-top: 20px;}
    .about1_le{width:100%;height: auto;}
	.about1_ri1 img{margin-top:20px;}
	.about1_ri1,.about1_ri2{width:100%;height: auto;}
	
    .index_2 p{font-size:20px;margin-top:20px;}
    .bat{margin-top:20px;}
    .index_3 p{font-size: 20px;margin-top: -70px;}
    .video_box{width: 100%;}
    .video_left{width: 100%;height: auto;}
    .video_left_top{width: 100%;height:auto;margin-top:-20px;}
    .video_left1 p,.video_left2 p,.video_left3 p,.video_left4 p{width: 100%;margin-bottom:10px;}
    .video_left1,.video_left2,.video_left3,.video_left4{width:47%;height: auto;}
    .video_left1 img,.video_left2 img,.video_left3 img,.video_left4 img{width:100%;height: auto;}
    .video_left1 p,.video_left2 p,.video_left3 p,.video_left4 p{width:100%;height: auto;}
    .video_right{margin-top:20px;}
    .index_4{clear: both;}
    .index_4 p{font-size:20px;padding-top:20px;}
    .pro2_box,.pro3_box,.pro4_box{width:100%;}
    .pro2_1,.pro2_2,.pro2_3,.pro2_4{width:49%;height: auto;overflow: hidden;}
    .pro3_1,.pro3_2,.pro3_3,.pro3_4{width:49%;height: auto;overflow: hidden;}
    .pro4_1,.pro4_2,.pro4_3,.pro4_4{width:49%;height: auto;overflow: hidden;}
    .index_5 p{font-size: 20px;padding-top:20px;}
    .banner1{width:100%;height:auto;}
    .banner1_box{width:100%;height: auto;}
    .banner1_box img{margin-top:20px;}
    .service{margin-top:10px;}
    .service_box img{width:100%;height:50%;}
    .service_box{width:100%;}
    .service_1{width:135px;margin-right:0px;}
    .service_1 p{margin-top:10px;font-size:16px;margin-bottom:0px;}
    .service_1 a{font-size:20px;display:block;}
    .service_1 span{font-size:16px;padding-top:2px;display: none;}
    .bottom{display:none;}
    .bottom2{display:block;width:100%;margin-top:-130px;}
}