Where is the html of the main page in Bitrix?

Question

CMS

On the site, on all pages except the main one, you need to change the background. Site on Bitrix. The main page only needs to change the code a bit, but I can't find it. css is there but html is not. Where to look for the file with the source code of the main one in Bitrix?

Answer 1

The body of the main page is here $_SERVER['DOCUMENT_ROOT'].'/index.php'.
If you need to add styles only for the main page of the site, then the easiest way is to add a condition to the site template:

<?php
$curPage = $APPLICATION->GetCurPage(true);
if (
            $curPage == SITE_DIR."index.php"
){?>

<style type="text/css">
  <!--
  стили для главной страницы
  -->
  </style>

<?}?>

in general, it is better to put the styles in a separate file:

<link rel="stylesheet" type="text/css" href="<?=CUtil::GetAdditionalFileURL(SITE_TEMPLATE_PATH."/for_index_page.css")?>" />

Answer 2

Here is the source of the template:
Administration->Settings->Sites->Site Templates