Flexbox顶部有意外的空格

Question

我有一个问题，一个flexbox没有填满我的导航栏，我不能为我的生活搞清楚，而负余量绝对没有什么

这是一个截图

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.hero {
  background-image: url("https://unsplash.it/1500?random");
  background-size: cover;
  background-position: center;
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  margin-top: -10px;
}

.hero>.center-content {
  width: 400px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  margin: auto;
}

.hero>.center-content h1,
.center-content h3 {
  color: white;
  line-height: 1;
}

.hero>.center-content h1 {
  text-transform: uppercase;
  font-size: 3em;
  margin-bottom: 0;
  text-align: center;
}

.hero>.center-content h3 {
  margin-bottom: 40px;
  font-size: 1.5em;
  font-weight: normal;
}

.center-content>.button {
  text-transform: uppercase;
  color: white;
  padding: 20px;
  border: 1px solid white;
  text-decoration: none;
}

.center-content>.button:hover {
  background-color: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.7);
  color: #006594;
}

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<div class="container" id="heroImage">
  <div class="hero">
    <div class="center-content">
      <h1>Lazris</h1>
      <h3>Revive Your Web Presence</h3>
      <a href="#" class="button">Some Action Here</a>
    </div>
  </div>
</div>

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Answer 1

删除活动菜单上的边距顶部

.nav > .active {
    /** margin-top: 10px; Remove **/
}