标题li项不会并排对齐

Question

我正试图将标题中的li项并排排列。但是，当我用内联显示和左浮动定义ul & li时，我想要实现的不会发生，让li项仍然垂直地而不是水平地堆叠在一起？

​

* {
    margin: 0;
    padding: 0;
    width: 100%;
    margin: 0;
    list-style: none;
    text-decoration: none;
    font-size: 1em;
    font-family: Helvetica Neue, Helvetica,Arial,Sans-serif;
}
a {
    background: transparent;
    border: none;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    transition: .3s color;
    transition: .3s height;
}
header {
    display: block;
    position: fixed;
    height: 80px;
    width: 100%;
}
.header-wrapper {
    width: 100%;
    height: 100%;
    background: transparent;
}
.header-bg,
.header-content {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    text-align: center;
}
.header-bg {
    color: gray;
    background: white;
    border-bottom: 1px solid black;
    transition: .3s height;
    height: 0;
}
.header-content {
    transition: .3s color;
    color: white;
    background: transparent;
    height: 80px;
    transition: .3s height;
    overflow: hidden;
    list-style: none;
}
ul {
       list-style-type: none;
       margin: 0;
       padding: 0;
}
li {
display: inline-block;
float:left;
}
.navBarLinks {
    color: inherit;
    cursor: pointer;
    font-size: .8em;
    letter-spacing: 0.05em;
    transition: .3s color;
}
content {
    display: block;
    height: 2000px;
    background: orange;
}
.stage {
    color: #fff;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    height: 100vh;
    background: white;
    border-bottom: 1px solid black;
    font-size: 48px;
    height: 200px;
    width: 100%;
}
.stage-0 {
    background: grey;
    height: 400px;
}

<header>
  <div class="header-wrapper">
    <div class="header-bg"></div>
    <div class="header-content">
      <ul id="horizontal-list">
        <li class="instagram"> <a href="" class="navBarLinks">Social Icon</a></li>
        <li class="home"><a href="" class="navBarLinks">Logo </a></li>
        <li class="hamburger"><a href="" class="navBarLinks">Hamburger</a></li>
      </ul>
    </div>
  </div>
</header>
<content>
<div class="stage stage-0">1</div>
<div class="stage stage-2">3</div>
<div class="stage stage-4">5</div>
<div class="stage stage-6">7</div>
<div class="stage stage-8">9</div>
<div class="stage stage-10">11</div>
<div class="stage stage-12">13</div>
<div class="stage stage-14">15</div>
<div class="stage stage-16">17</div>
<div class="stage stage-18">19</div>
<div class="stage stage-20">21</div>
<div class="stage stage-22">23</div>
</content>

​

Answer 1

由于以下原因，列表项垂直堆叠：

* {
    margin: 0;
    padding: 0;
    width: 100%; /*right here*/
    margin: 0;
    list-style: none;
    text-decoration: none;
    font-size: 1em;
    font-family: Helvetica Neue, Helvetica,Arial,Sans-serif;
}

每个列表项-- 这件事的一切 --都有100%的宽度，因此它们被迫叠加。考虑将width:100%;放置在类上或其他一些目标元素的方法上可能更谨慎。*通常用于默认样式的绝对重置。