   <input type="checkbox" id="opcoes" class="menu-ham">
        <label for="opcoes">
            <div class="icone-menu">
            </div>
        </label>
        <nav class="nav">
            <ul>
                <li class="nav-item"><a href="#">Início</a></li>
                <li class="nav-item"><a href="#sobre">Sobre</a></li>
                <li class="nav-item"><a href="#sobre 2">Como Instalar</a></li>
                <li class="nav-item"><a href="#formulario">Contato</a></li>
            </ul>
   