@import url("smartphone.css") only screen and (max-width:599px);
@import url("gtsmart.css") only screen and (min-width:600px);
@import url("tb.css") only screen and (max-width:999px);
@import url("ltpc.css") only screen and (max-width:1099px);
@import url("pc.css") only screen and (min-width:1100px);
@import url("nb.css") only screen and (min-width:1000px) and (max-width:1199px);
@import url("dt.css") only screen and (min-width:1200px);