.bottomimg{
  background: url(https://tkww-static.tkww.hk/agreementImg/images/projectImg/special/bg_bottom.jpg) no-repeat;
	background-position-x: center;
}
.topimg{
  background: url(https://tkww-static.tkww.hk/agreementImg/images/projectImg/special/bg_top.jpg) no-repeat;
  padding-top: 150px;
  margin-top: 10px;
	background-position-x: center;
}