page.php

You don’t need the page.php. You can change the custom-page.php of your child-theme (so copy the parent custom-page.php in your child-theme folder and modify it) and select it as template for you wpdeals pages.
That said, I gave a look at this wpdeals.. well it shares a lot with woocommerce, for which customizr is compatible.
So you can do this instead of changing templates and other stuff like that.. just add the code below in your child-theme functions.php :

add_action('after_setup_theme', 'wp_deals_comp', 50);
function wp_deals_comp(){
    if ( ! is_plugin_active('wp-deals/wpdeals.php') )
        return;

    // unhook wp deals wrapper
    remove_action('wpdeals_before_main_content', 'wpdeals_output_content_wrapper', 10 );
    remove_action('wpdeals_after_main_content', 'wpdeals_output_content_wrapper_end', 10 );

    // hook customizr wrapper and action hooks
    add_action('wpdeals_before_main_content', 'tc_wpdeals_wrappers');
    add_action('wpdeals_after_main_content', 'tc_wpdeals_wrappers');

    function tc_wpdeals_wrappers() {
        switch ( current_filter() ) {
          case 'wpdeals_before_main_content':

          ?>
            <div id="main-wrapper" class="<?php echo tc__f( 'tc_main_wrapper_classes' , 'container' ) ?>">

            <?php do_action( '__before_main_container' ); ##hook of the featured page (priority 10) and breadcrumb (priority 20)...and whatever you need! ?>

            <div class="container" role="main">
                <div class="<?php echo tc__f( 'tc_column_content_wrapper_classes' , 'row column-content-wrapper' ) ?>">

                    <?php do_action( '__before_article_container'); ##hook of left sidebar?>

                        <div id="content" class="<?php echo tc__f( '__screen_layout' , tc__f ( '__ID' ) , 'class' ) ?> article-container">

                            <?php do_action ('__before_loop');##hooks the header of the list of post : archive, search... ?>
          <?php

            break;

          case 'wpdeals_after_main_content':
          ?>
                            <?php do_action ('__after_loop');##hook of the comments and the posts navigation with priorities 10 and 20 ?>

                        </div><!--.article-container -->

                    <?php do_action( '__after_article_container'); ##hook of left sidebar?>

                </div><!--.row -->
            </div><!-- .container role: main -->

            <?php do_action( '__after_main_container' ); ?>

          </div><!--#main-wrapper"-->

          <?php
            break;
        }//end of switch on hook
        ?>
        <?php
    }//end of nested function

    //handles the wpdeals sidebar: removes action if sidebars not active
    if ( ! is_active_sidebar( 'deals' ) ) {
        remove_action( 'wpdeals_sidebar', 'wpdeals_get_sidebar', 10 );
    }

    //disables post navigation
    add_filter( 'tc_show_post_navigation', 'tc_wpdeals_disable_post_navigation' );
    function tc_wpdeals_disable_post_navigation($bool) {
        return ( function_exists('is_wpdeals') && is_wpdeals() ) ? false : $bool;
    }

    //removes post comment action on after_loop hook
    add_filter( 'tc_show_comments', 'tc_wpdeals_disable_comments' );
    function tc_wpdeals_disable_comments($bool) {
        return ( function_exists('is_wpdeals') && is_wpdeals() ) ? false : $bool;
    }
}

This is exactly the same code customizr uses for woocommerce compatibility (just adapted, changing functions and hooks names).
I’ve made a small tests and works pretty fine.
Just add also this on your custom css:

.deals-description {
    clear: both;
}

You shouldn’t do it.
Who talked about sidebars? 🙂
Is this the plugin we’re talking about? https://ww.wp.xz.cn/plugins/wp-deals/
If yes, please paste the whole content of your functions.php in pastebin and then paste the link here. ‘Cause that code works, I tested it as I said.

Also I still don’t get why you don’t wanna use a child theme. A child theme inherits all the options you set in the parent theme. The only thing you have to set again is the menu, just select it again, not build it from the start.
Also, whatever you change in the parent theme files will be lost with a theme update.

But it’s your choice.

Btw the css part isn’t applied ’cause you have this in your custom css:

/*Current page menu item*/
.navbar .nav > li.current-menu-item > a{
    color: #7EC247;
    background: #000000;

.deals-description {
    clear: both;
}

as you can see a closing bracket is missing before .deals-description .
So wanna share your functions.php so we can see why doesn’t work for you?

@ibogo
let me clear you one thing:

/*Current page menu item*/
.navbar .nav > li.current-menu-item > a{
    color: #7EC247;
    background: #000000;

.deals-description {
    clear: both;
}

That is wrong, this is good:

/*Current page menu item*/
.navbar .nav > li.current-menu-item > a{
    color: #7EC247;
    background: #000000;
}
.deals-description {
    clear: both;
}

Now, you say doesn’t change anything ’cause you have other problems, but it changes something.
That said, fine you’re using another plugin, let’s see what can we do to make it compatible with customizr.
So I presume is this right? https://ww.wp.xz.cn/plugins/deals-engine/

Hey @ibogo
you know what? There must have been an issue on this forum, for example I couldn’t see this when I replied about the css rule not applied. 🙂