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我在滾動頁面時停止標題變得透明很麻煩。我不知道是什麼原因造成它（我用的模板），但你可以查看這裏的代碼：標題頂部是透明的
https://github.com/IF-Apps/IF-Charts
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<title>IF-Charts - Charts and Plates for Flight Simulation</title>
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<section class="hero">
<section class="navigation">
<header>
<div class="header-content">
<div class="header-nav">
<nav>
<ul class="primary-nav">
<li><a href="index.html">Home</a></li>
<li><a href="ifcharts.html">IF-Charts</a></li>
<li><a href="learnmore.html">Learn More</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</nav>
</div>
<div class="navicon">
<a class="nav-toggle" href="#"><span></span></a>
</div>
</div>
</header>
</section>
<div class="container">
<div class="row">
<div class="col-md-10 col-md-offset-1">
<div class="hero-content text-center">
<h1>IF-Charts</h1>
<p class="intro">Plan your flight with plates.</p>
</div>
</div>
</div>
</div>
</section>
<section class="features section-padding" id="features">
<div class="container">
<div class="row">
<div class="feature-list">
<h3>Plan your flight</h3>
<p>Select the airport you would like charts for. Want to learn how to use charts? Check out the <a href="tutorial.html">tutorial</a>. PLEASE NOTE THAT THESE CHARTS ARE NOT FOR OPERATIONAL USE!</p>
<br>
<div class="fb-like" data-href="https://www.facebook.com/IF-Charts-1233474450057832/" data-layout="button_count" data-action="like" data-show-faces="true" data-share="true"></div> <br> <br>
<br>
<div align="center">
<h2>Please choose:</h2>
<br />
<span>
<a href="charts_depart.html"><img src="img/takeoff-the-plane.png" alt="Departures" style="width:80px;height:80px;border:0;"></a>
<a href="charts_arrive.html"><img src="img/plane-landing.png" alt="Arrivals" style="width:80px;height:80px;border:0;"></a>
</span>
<p>View all charts <a href="ifcharts-old.html">here</a>.
</div>
</section>
<footer>
<div class="container">
<div class="row">
<div class="col-md-7">
<div class="footer-links">
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我認爲它與CSS做的，但我不當然。
問題是，當在頂部時，無法看到菜單項。我只想讓標題保持黑色。你可以看到這裏的問題：
https://if-charts.000webhostapp.com/
我們需要在這裏查看代碼...相關代碼 – DaniP