为什么顶部的边距不会改变？

Question

我正在尝试编辑导航栏链接的边距，但是当我更改边距时，没有任何反应。有谁知道为什么会这样？

/* Whole Page or not one specific section */
main {
  text-align: center;
}

body {
  max-width: 100%;
  height: 100vh;
  margin: 0px 0px 0px 0px;
  color: #C2D3CD;
}

.topbar, nav {
  background-color: #847E89;
}

/* Top Bar */
#temp-logo, #donate-top {
  display: inline-block;
}

#donate-top {
  float: right;
  padding-right: 2%;
  padding-left: 2%;
  background-color: #C2D3CD;
  color: #847E89;
  height: 10vh;
  cursor: pointer;
}

.donate-name {
  padding-top: 4vh;
  background-color: #C2D3CD;
  border: none;
  cursor: pointer;
}

#temp-logo {
  padding-top: 0vh;
  margin-left: 2%;
  font-size: 22px;
}

.topbar {
  display: block;
  border-bottom: solid 1px #C2D3CD;
  height: 10vh;
}

/* Nav Bar */
nav {
  text-align: center;
  height: 7vh;
}

.link, link:visited {
  color: #C2D3CD;
  text-decoration: none;
}

#mission-link, #about-link, #donations-link, #contact-link {
  margin-top: 5%;
}

/* First Page */
#home-screen {
  background-image: url(Images/beach-background-1-NEW.jpg);
  height: 80vh;
  width: 100%;
  background-repeat: no-repeat;
  background-size: 100%;
}

.text {
  padding-top: 30vh;
}

/* Gallery */
.img {
  width: 20vw;
  height: 20vw;
}

.desc {
  display: inline-block;
  position: relative;
  margin: 1%;
}

.desc:hover img {
  filter: blur(1.5px) brightness(60%);
  transition: 0.3s;
  box-shadow: 0 0 10px gray;
}

.desc :not(img) {
  position: absolute;
  top: 37%;
  z-index: 1;
  text-align: center;
  width: 100%;
  color: #FFF;
  opacity: 0;
  transition: 0.3s;
}

.desc:hover :not(img) {
  opacity: 1;
}

.img:hover {
  transform: scale(1.1);
}

<!DOCTYPE html>
<html>
  <head>
    <link href="main.css" rel="stylesheet">
    <title>Conejo Teen Organization</title>
  </head>
  <body>
    <!-- Top Bar -->
    <div class="topbar">
      <!-- Get logo ASAP -->
      <p id="temp-logo"><em>Conejo Teen Organization</em></p>
      <a id="donate-top" class="donate" href="#"><button class="donate-name">Donate</button></a>
    </div>
    <!-- Nav -->
    <nav> 
      <a id="mission-link" class="link" href="#">Mission</a>
      <a id="about-link" class="link" href="#">About Us</a>
      <a id="donations-link" class="link" href="#">What We Do</a>
      <a id="contact-link" class="link" href="#">Contact</a>
    </nav>
    <!-- Main -->
    <main>
      <!-- First Section -->
      <section id="home-screen">
       <article class="text">
        <h1 id="h1">Conejo Teen Organization</h1>
        <p id="h1-desc">Helping California teens in need since 2017</p>
        <button id="donate-home" class="donate">Donate Now!</button>
        </article>
      </section>
      <!-- Our Mission -->
      <section id="mission">
        <h2 id="mission-h2">Our Mission</h2>
        <p id="mission-statement">Our goal is to identify organizations and individuals in need, and assist in the most effective and appropriate way. In addition, the specific objective and purpose of Conejo Teen Organization shall be to provitde teens in an opportunity to learn about, perform and be engaged in community service activities. We want to provide a safe outlet and positive culture for teens to engage with other like-minded teens and mentors.</p>
      </section>
      <!-- Image Gallery (images of projects) -->
      <section id="gallery">
        <h2 id="images">Gallery</h2>
        <!-- Put service images here. On hover, enlarge image and put text overlay with link to that project -->
        <div class="row1 row">
          <!-- Image 1 -->
          <div class="desc-1 desc">
            <img src="Gallery/DecMyRoom-1-Edit.jpg" class="img img-1">
            <h3 id="img-desc">Dec My Room</h3>
          </div>
          <!-- Image 2 -->
          <div class="desc desc-2">
            <img src="Gallery/DecMyRoom-2-Edit.jpg" class="img img-2">
            <h3 id="img-desc">Dec My Room</h3>
          </div>
          <!-- Image 3 -->
          <div class="desc desc-1">
            <img src="Gallery/DecMyRoom-3-Edit.jpg" class="img img-3">
            <h3 id="img-desc">Dec My Room</h3>
          </div>
        </div>
      </section>
    </main>
    <!-- Footer -->
    <footer>
      <p id="copyright">&copy 2018 Conejo Teen Organization</p>
      <p id="my-credit">Created by <a href="#">Jacob Pieczynski</a></p>
    </footer>
  </body>
</html>

Answer 1

您正在尝试将 margin-top 应用于 inline 元素，但您不能这样做，因为这会中断页面的流动：

#mission-link, #about-link, #donations-link, #contact-link {
  display: inline-block; /* Try making them inline block */
  margin-top: 5%;
}

尝试建立链接inline-block。

Answer 2

添加display: inline-block喜欢：

#mission-link, #about-link, #donations-link, #contact-link {
  margin-top: 5%;
  display: inline-block;
}

我已经检查了您的代码删除：height: 10vh; from topbar class

为什么顶部的边距不会改变？

Why won't the margin on the top change?

html

css

margin

padding