Unstable CSS, how to fix it

Good evening guys, it’s a pleasure to be part of this community. I encountered a problem on my site with CSS, as you can see from the link, after the description on the right side of the page begins “address, details etc.”.
I have modified these in CSS and in some pages it remains as I want it, under the slide alongside the description.. in others how it moves. My question is, how can I make an element I edit with CSS stable and firm? Thanks I hope you can help me, I have been trying for days.
This is the code I used for the elements

.price_area {
    position:relative;
	top:675px;
	margin-right:500px;
	z-index:20;
}

.wpestate_property_description
{
	position:relative;
	box-sizing:border-box;
	width: 700px;
  padding: 1px;  
  border: 0px solid blue;
	top:50px;
	margin-bottom:-800px;
	z-index:-1
	
	}

#accordion_prop_addr, #accordion_prop_details, #accordion_prop_features
{
	
	position:relative;
	display:block;
	height:220px;
	width:590px;
	bottom:0px;
	left:750px;
	z-index:25;
	margin-bottom:-50px
}

.wpestate_agent_details_wrapper
{
	position:relative;
	top:200px
}

• This topic was modified 6 years, 2 months ago by denardis.
• This topic was modified 6 years, 2 months ago by denardis.

The page I need help with: [log in to see the link]