.main-services .s-item {
    height: auto !important;
    min-height: 100vh !important;
}

.btn-default {
  position: relative;
  isolation: isolate;
}

.btn-default:before {
  z-index: -1;
}

.btn-default span {
  position: relative;
  z-index: 2;
  color: #fff !important;
}