.aw-kv {
    width: 100%;
    height: 112vw;
	background-image: url(/brand/biztrf/aiot/img/aiot-kv-2020-01.png);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}
.gbox {
	margin: 30px auto;
}

@media screen and (min-width: 640px){
	.aw-kv {
	  height: 60vw;
	  background-image: url(/brand/biztrf/aiot/img/aiot-kv-2020-02.png);
	}
	.gbox {
		margin-bottom: 50px;
	}
	.gwrap {
		width: 360px;
	}
}

@media screen and (min-width: 768px){
	.aw-kv {
	  height: 58vw;
	}
}

@media screen and (min-width: 980px){
	.aw-kv {
	  height: 45vw;
	}
}

@media screen and (min-width: 1400px){
	.aw-kv {
	  height: 34vw;
	  background-image: url(/brand/biztrf/aiot/img/aiot-kv-2020-03.png);
	}
}