我希望导航栏是透明的,但是当您向下滚动页面时,它会变为红色,例如.
<div class="nav">
<div class="container">
<div class="logo">
<a href="#"><img src="RepublicSquare_logo.svg" style="height: 80px;"></a>
</div>
<div class="navMain">
<ul>
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Services</a></li>
<li><a href="#">Portfolio</a></li>
<li><a href="#">Contact</a></li>
</ul>
</div>
</div>
</div>
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