使用Bootstrap我的手机导航栏太长了

我的网站代码有点问题https://bjmrq.github.io/foyer.html笔记本电脑上一切正常，但当我用手机查看时，导航栏似乎太长了！如果有人能帮我的话：)(我用的是Bootstrap 4) 感谢您抽出时间！

<nav id="mainNavbar" class="navbar navbar-dark navbar-expand-sm fixed-top" style="background-color: #563d7c;">
<a class="navbar-brand navTitle mx-2" href="index.html"><span class="fas fa-camera-retro"></span>&nbsp; Sophie Madonna</a>
<button class="navbar-toggler" data-toggle="collapse" data-target="#navLinks" aria-label="Toggle navigation">
  <span class="navbar-toggle``r-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navLinks">
  <ul class="navbar-nav">
    <li class="nav-item mx-2">
      <a class="navbar navTitle nav-link" href="foyer.html"><span class="fab fa-gripfire"></span>&nbsp; Le foyer</a>
    </li>
  </ul>
  <ul class="navbar-nav ml-auto">
    <li class="nav-item mx-2">
      <a href="about.html" class="nav-link">My Story</a>
    </li>
    <li class="nav-item mx-2">
      <a href="contact.html" class="nav-link">Follow Me</a>
    </li>
  </ul>
</div>

.navbar {
font-family: 'Ranga';
color: white;
font-size: 1.3em;
}

.navbar-light .navbar-brand .navbar-nav .nav-link .navTitle .navbar .navbar-dark {
font-family: 'Ranga';
color: white;
font-size: 1.3em;
}

here is my problem

---

解决方案

第一个<h1>标记下面的<hr>元素具有设置的宽度width: 500px;，这会导致正文的其余部分在较小的屏幕上向左推。