#sec1 .sec1_slide .img1{background: url(../img/sub3/5/image1.jpg)no-repeat 50% 50%;background-size: cover;}
#sec1 .sec1_slide .img2{background: url(../img/sub3/5/image2.jpg)no-repeat 50% 50%;background-size: cover;}
#sec1 .sec1_slide .img3{background: url(../img/sub3/5/image3.jpg)no-repeat 50% 50%;background-size: cover;}

#sec2{background: url(../img/sub3/5/image2.jpg)no-repeat 50% 50%;background-size: cover; }