.div_banner {
  background-color: #f5f6fa;
  width: 100%;
  position: relative;
  z-index: -2;
  padding-bottom: 5%;
}
.banner_div {
  width: 50%;
  height: 70%;
  background-color: #fff;
  position: absolute;
  top: 12%;
  right: 0;
  z-index: -1
}
.footer_div {
  background-color: #f5f6fa;
  padding-top: 3%;
  padding-bottom: 3%;
  margin-top: 5%;
}
.footer_a {
  display:inline-block;
  height: 55px;
  max-width: 142px;
  border-radius: 15px;
  background-color: #f9ad3d;
  color: #fff;
  font-size: 18px;
  line-height: 55px;
  text-align: center;
}
.footer_a:hover {
  background-color: #d18e00;
  color: #fff;
}