@media only screen and (min-width: 640px) {
#bk_image { float:left; width:103%; height:105%;margin-left:-2%;   }	
#floor { transform: perspective(350px) rotateX(71deg) skewX(2.6deg); width:100%; margin-top:7.7%; margin-left:2.8%; }	
.floor_img25 {width:6.2%; } 
}
@media only screen and (min-width: 800px) {
#bk_image { float:left; width:103%; height:70%; margin-left:-2%;  }	
#floor { transform: perspective(650px) rotateX(71deg) skewX(-3.6deg); width:90%; margin-top:7.7%; margin-left:2.8%; }
.floor_img25 {width:6.2%; } 	
}
@media only screen and (min-width: 960px) {
#bk_image { float:left; width:116%; height:106%; margin-left:-7%;  }
#floor { transform: perspective(650px) rotateX(71deg) skewX(-3.6deg); width:92%; margin-top:7.7%; margin-left:2.8%; }	
.floor_img25 {width:6.2%; } 
}
@media only screen and (min-width: 1024px) {	
#bk_image { float:left; width:103%; height:67%; margin-left:-2%;  }
#floor { transform: perspective(550px) rotateX(71deg) skewX(-1.6deg); width:98%; margin-top:7.7%; margin-left:2.8%; }
.floor_img25 {width:6.2%; } 	
}
@media only screen and (min-width: 1280px) {
#bk_image { float:left; width:103%; height:103%;margin-left:-2%;   }
#floor { transform: perspective(650px) rotateX(71deg) skewX(-3.6deg); width:90%; margin-top:7.7%; margin-left:2.8%; }
.floor_img25 {width:6.2%; } 
}
@media only screen and (min-width: 1824px) {
#bk_image { float:left; width:103%; height:103%;margin-left:-2%;   }
#floor { transform: perspective(650px) rotateX(71deg) skewX(-3.6deg); width:90%; margin-top:7.7%; margin-left:2.8%; }
.floor_img25 {width:6.2%; } 
}
@media only screen and (min-width: 2560px) {
#bk_image { float:left; width:103%; height:103%; margin-left:-2%;  }
#floor { transform: perspective(1350px) rotateX(71deg) skewX(-3.6deg); width:90%; margin-top:7.7%; margin-left:2.8%; }
.floor_img25 {width:7.2%; } 
}