Button Aligment on Desktop and Mobile

Hi there, 

I am trying to align the buttons on a few pages of my site. I would like the buttons to be aligned with the other buttons in that section, regardless of the content in the column. See attached screenshots. 

These are the pages:

https://www.westendskincare.com/facials
https://www.westendskincare.com/advanced-skincare-treatments
https://www.westendskincare.com/hair-removal
https://www.westendskincare.com/packages

I tired using the below code (on the facials page) but it is not working. Any suggestions?

@media screen and (min-width:641px) {#collection-605105ce98128e2f5856d180
  button {display: flex; 
  justify-content: center;
  align-items: center; 
  }
}

Also tried this to target the section:

@media screen and (min-width:641px){section[data-section-id="605105ce98128e2f5856d184"]
  .button {display: flex; 
  justify-content: center;
  align-items: center; 
  }
}
 

Thank you!
 

With Facials Page, add to Design > Custom CSS. If it works, we will give code for other pages

/* align facials buttons */
@media screen and (min-width:768px) {
div#page-section-605105ce98128e2f5856d184>.row {
    display: flex;
}
div#page-section-605105ce98128e2f5856d184 .button-block {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}
div#page-section-605105ce98128e2f5856d184 .span-4 {
    flex: 1;
    position: relative;
    padding-bottom: 100px;
}
}

Thank you @tuanphan! I will test and let you know. Appreciate it!