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html - 为什么调整导航栏大小时我的图像消失

问题描述

我有一个响应式导航栏并有一个下拉菜单。当我调整浏览器的大小以便到达断点并且导航转到其移动视图时，下面的英雄图像将消失并且部分看到标题标签，我不确定并且看不到是什么导致了这种情况。任何帮助将不胜感激！

HTML

    <section class="navigation">
  <div class="nav-container">
    <div class="brand">
      <a href="#!">image</a>
    </div>
    <nav>
      <div class="nav-mobile"><a id="nav-toggle" href="#!"><span></span></a></div>
      <ul class="nav-list">
        <li>
          <a href="#!">header 10</a>
        </li>
        <li>
          <a href="#!">header 9</a>
          <ul class="nav-dropdown">
            <li>
              <a href="#!">header 8</a>
            </li>
            <li>
              <a href="#!">header 7</a>
            </li>
            <li>
              <a href="#!">header 6</a>
            </li>
                        <li>
              <a href="#!">header 5</a>
            </li>
                        <li>
              <a href="#!">header 4</a>
            </li>
          </ul>
        </li>
        <li>
          <a href="#!">header3</a>
        </li>
        <li>
          <a href="#!">header 2</a>
        </li>
                <li>
          <a href="#!">Header 1</a>
        </li>
      </ul>
    </nav>
  </div>
</section>

<div class="hero-image">
  <div class="hero-text">
    <h1>Bring Your Garden And Driveway to life </h1>
    <h2>Scroll Down To Learn More</h2>
  </div>
</div>

CSS

    @charset "UTF-8";
.navigation {
  height: 70px;
  background: #262626;
}

.brand {
  position: absolute;
  padding-left: 20px;
  float: left;
  line-height: 70px;
  text-transform: uppercase;
  font-size: 1.4em;
}
.brand a,
.brand a:visited {
  color: #ffffff;
  text-decoration: none;
}

.nav-container {
  max-width: 1000px;
  margin: 0 auto;
}

nav {
  float: right;
}
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
nav ul li {
  float: left;
  position: relative;
}
nav ul li a,
nav ul li a:visited {
  display: block;
  padding: 0 20px;
  line-height: 70px;
  background: #262626;
  color: #ffffff;
  text-decoration: none;
}
nav ul li a:hover,
nav ul li a:visited:hover {
  color: grey;
}
nav ul li a:not(:only-child):after,
nav ul li a:visited:not(:only-child):after {
  padding-left: 4px;
  content: ' ▾';
}
nav ul li ul li {
  min-width: 190px;
}
nav ul li ul li a {
  padding: 15px;
  line-height: 20px;
}

.nav-dropdown {
  position: absolute;
  display: none;
  z-index: 1;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.15);
}

/* Mobile navigation */
.nav-mobile {
  display: none;
  position: absolute;
  top: 0;
  right: 0;
  background: #262626;
  height: 70px;
  width: 70px;
}

@media only screen and (max-width: 798px) {
  .nav-mobile {
    display: block;
  }

  nav {
    width: 100%;
    padding: 70px 0 15px;
  }
  nav ul {
    display: none;
  }
  nav ul li {
    float: none;
  }
  nav ul li a {
    padding: 15px;
    line-height: 20px;
  }
  nav ul li ul li a {
    padding-left: 30px;
  }

  .nav-dropdown {
    position: static;
  }
}
@media screen and (min-width: 799px) {
  .nav-list {
    display: block !important;
  }
}
#nav-toggle {
  position: absolute;
  left: 18px;
  top: 22px;
  cursor: pointer;
  padding: 10px 35px 16px 0px;
}
#nav-toggle span,
#nav-toggle span:before,
#nav-toggle span:after {
  cursor: pointer;
  border-radius: 1px;
  height: 5px;
  width: 35px;
  background: #ffffff;
  position: absolute;
  display: block;
  content: '';
  transition: all 300ms ease-in-out;
}
#nav-toggle span:before {
  top: -10px;
}
#nav-toggle span:after {
  bottom: -10px;
}
#nav-toggle.active span {
  background-color: transparent;
}
#nav-toggle.active span:before, #nav-toggle.active span:after {
  top: 0;
}
#nav-toggle.active span:before {
  transform: rotate(45deg);
}
#nav-toggle.active span:after {
  transform: rotate(-45deg);
}

body, html {
  height: 100%;
  margin: 0;
  font-family: 'Montserrat', sans-serif;
}

body {
  height: 1000px;
}

.hero-image {
  background-image: url(https://stmed.net/sites/default/files/leaves-wallpapers-25246-1391025.jpg);
  height: 50%;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/*==========WELCOME-TEXT==========*/
.hero-text {
  text-align: center;
  color: white;
  font-family: 'Slabo 27px', serif;
  font-size: 26px;
}

.hero-text h2 {
  font-style: italic;
  font-size: 22px;
}

@media only screen and (max-width: 450px) {
  .hero-text h1 {
    font-size: 20px;
    font-family: 'Slabo 20px', serif;
  }

  .hero-text h2 {
    font-size: 18px;
  }
}

下面是我的代码 https://jsfiddle.net/wkqph6x4/1/的 jsfiddle

标签： htmlcss

解决方案

您需要在.hero-image类上指定宽度。在这种情况下width: '100%';应该就足够了，尽管它可以是你想要的任何东西。

你会注意到，一旦你这样做了，导航和主图之间就会有一个15px间隙，这是从nav元素的底部填充开始的。如果这是一种风格/设计选择，那么无需担心删除或调整它。只是想提个醒。

更新小提琴：https ://jsfiddle.net/wxbj0L17/1/

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