     <li class="astro-3HS6YOU4">
                  <a href="#" class="astro-3HS6YOU4">Introduction <i class="fa arrow astro-3HS6YOU4"></i></a>
                  <ul class="nav astro-3HS6YOU4">
                    <li class="astro-3HS6YOU4"><a href="#whats-inside" class="astro-3HS6YOU4">What's Inside?</a></li>
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                </li>

                <li class="nav-header astro-3HS6YOU4">STRUCTURE</li>
                <li class="astro-3HS6YOU4">
                  <a href="#html-structur