.ProductDetail_b1 {width: 1200px; margin: 0 auto;}
.ProductDetail_b1 h2{ font-size:30px; line-height:50px; margin-bottom:20px;font-family:"微软雅黑";}
.ProductDetail_b1 h3{ font-size: 16px; line-height:32px; font-family:Arial;}
.ProductDetail_b1 .Product_Detail{ width:100%; margin-top:50px;}

.caseback{ width:180px; height:180px; display:block; margin:50px auto; border-radius:50%; text-align:center; line-height:180px; font-size:40px;font-family:"微软雅黑"; color:#333; border:3px #0077cc solid;transform:translateY(0px);transition-duration:0.5s;}
.caseback:hover{transform:translateY(-10px);transition-duration:0.5s; color:#333;}