/**common css**/
*{margin:0px;padding:0px}
.clear{clear:both}

/**wrapper**/
#wrapper{width:800px;height:300px;background:#FFFFFF;margin:5px auto}

/**header**/
#header{width:800px;height:300px;background:#C0C0C0;padding-top:20px}
#slider{width:500px;height:200px;margin-left:150px;margin-top:40px;display:flex;box-shadow:5px 5px 10px pink;}