#container {
  background-color: var(--colorGray100);
}

.content-section .content-inner {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 40px 0;
}

.title-group-content,
.title-group,
.sub-title-group {
  align-items: center;
}

.desc {
  text-align: center;
}

/* responsive css */
@media screen and (min-width: 768px) and (max-width: 1279px) {
  .title-group-content {
    width: 100%;
  }
  .btn-group {
    width: 100%;
  }
  .btn.medium {
    flex: 1;
    padding: 0;
  }
}

@media screen and (max-width: 767px) {
  section {
    padding: 60px 0 80px 0;
  }
  .title-group-content {
    width: 100%;
  }
  .content-section .content-inner {
    gap: 20px 0;
  }
  .btn-group {
    gap: 10px 0;
  }
}