.bg-top-image-1{background-image:url(/images/bg/PC_top_1.webp)}@media (max-width:520px){.bg-top-image-1{background-image:url(/images/bg/SP_top_1.webp)}}.bg-top-image-2{background-image:url(/images/bg/PC_top_2.webp)}@media (max-width:520px){.bg-top-image-2{background-image:url(/images/bg/SP_top_2.webp)}}.bg-top-image-3{background-image:url(/images/bg/PC_top_4.webp)}@media (max-width:520px){.bg-top-image-3{background-image:url(/images/bg/SP_top_4.webp)}}