#sec1 .main_slide .img1{background: url(../images/sub3/5/image1.jpg)no-repeat 50% 50%;background-size: cover;}
#sec1 .main_slide .img2{background: url(../images/sub3/5/image2.jpg)no-repeat 50% 50%;background-size: cover;}
#sec1 .main_slide .img3{background: url(../images/sub3/5/image3.jpg)no-repeat 50% 50%;background-size: cover;}
#sec1 .main_slide .img4{background: url(../images/sub3/5/image4.jpg)no-repeat 50% 50%;background-size: cover;}

#sec2 .sec2_in .mi .img{width:100%;height:700px;background: url(../images/sub3/5/image1.jpg)no-repeat 50% 50%;background-size: cover;}