/*responsive_1*/
.responsive_1 { width: 320px; height: 100px; }
@media(min-width: 500px) { .responsive_1 { width: 468px; height: 60px; } }
@media(min-width: 800px) { .responsive_1 { width: 728px; height: 90px; } }

/*responsive_2*/
.responsive_2 { width: 320px; height: 100px; }
@media(min-width: 800px) { .responsive_2 { width: 728px; height: 90px; } }