Landing pages aren't like any other page of a website. The goal isn't to get users to discover new content for engagement. It's to target a specific group of users with a particular product to convert them into customers. Therefore, the design and layout of your landing page should reflect this.
Since a landing page isn't for discovery or engagement, it should not include a navigation bar or header. Instead, it needs to have these three sections in this order:
Hero Section
Feature Sections
Call-to-Action Section