The necessary plugins for this demo are:
1. Elementor
2. DFD Extensions (it is included in the theme)
3. Slider Revolution (it is included in the theme)
4. MC4WP: Mailchimp for WordPress

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Slider Revolution for import - duotone1.zip

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The code for the Mailchimp form
MC4WP - Form - Add new form - paste into "Form code" - Save Changes

<div class="elementor-container">
  	<div class="elementor-column elementor-col-70">
  		<input type="email" name="EMAIL" placeholder="Type your email" required />
  	</div>
  	<div class="elementor-column elementor-col-30">
  		<input type="submit" value="SUBSCRIBE" />
  	</div>
</div>

Copy the shortcode (for example [mc4wp_form id=68]) and replace it in the demo.