@import url(stylepc.css) screen and (min-width: 1281px);
@import url(stylepcs.css) screen and (max-width: 1280px) and (min-width: 921px);
@import url(styletablet.css) screen and (max-width: 920px) and (min-width: 768px);
@import url(stylesmart.css) screen and (max-width: 767px);