.pc_640 { display: block; }
.sp_640 { display: none; }
@media only screen and (max-width: 641px) {
.pc_640 { display: none; }
.sp_640 { display: block; }
}

.pc_768 { display: block; }
.sp_768 { display: none; }
@media only screen and (max-width: 769px) {
.pc_768 { display: none; }
.sp_768 { display: block; }
}

.pc_1024 { display: block; }
.sp_1024 { display: none; }
@media only screen and (max-width: 1025px) {
.pc_1024 { display: none; }
.sp_1024 { display: block; }
}

.pc_1280 { display: block; }
.sp_1280 { display: none; }
@media only screen and (max-width: 1281px) {
.pc_1280 { display: none; }
.sp_1280 { display: block; }
}