section.wp-block-cnb-sectiongray {
  margin-bottom: 0;
  position: relative;
  padding: 50px 0;
}
section.wp-block-cnb-sectiongray::after {
  content: '';
  display: block;
  background: #F5F8FA;
  position: absolute;
  top: 0;
  bottom: 0;
  width: 100vw;
  left: 50%;
  transform: translateX(-50%);
  z-index: -1;
}