Question

我正在制作一个带样式的简单HTML。我希望每个部分都有不同不透明度的颜色叠加。叠加层应该是覆盖整个屏幕但不包括顶部导航栏的全宽度，但在我的样本工作html中它也完全覆盖了顶部区域。我还注意到，当我在下面添加另一部分时，它将与第一部分放在同一位置。

每个部分都应该有不同的不透明度。

我设法通过按导航栏的高度调整顶部来修复它。

＆＃13;

@import url('https://fonts.googleapis.com/css?family=Oswald:700');
html {
  background: url(https://images.pexels.com/photos/28026/pexels-photo-28026.jpg?w=1260&h=750&auto=compress&cs=tinysrgb) no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Oswald', sans-serif;
}
h1 {
  color: #cccccc;
}
/* Remove margins and padding from the list, and add a black background color */
ul.topnav {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
}
/* Float the list items side by side */
ul.topnav li {
  float: left;
}
/* Style the links inside the list items */
ul.topnav li a {
  display: inline-block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  transition: 0.3s;
  font-size: 17px;
}
/* Change background color of links on hover */
ul.topnav li a:hover {
  background-color: #555;
}
/* Hide the list item that contains the link that should open and close the topnav on small screens */
ul.topnav li.icon {
  display: none;
}
.spacer {
  margin-bottom: 20%;
}
.primary-head {
  font-size: 70px;
  font-weight: 700;
}
.sub-head {
  font-size: 50px;
  font-weight: 700;
  color: #9b9595;
  margin-top: -70px;
}
.section-one__overlay {
  position: absolute;
  padding: 0;
  margin: 0;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.5);
}

＆＃13;

<nav>
  <ul class="topnav" id="myTopnav">
    <li>
      <a href="" title="">Home</a>
    </li>
    <li>
      <a href="" title="">About</a>
    </li>
  </ul>
</nav>
<div class="section-one">
  <div class="section-one__overlay">
    <div class="spacer"></div>
    <h1 class="primary-head">Lorem ipsum dolor.</h1>
    <h2 class="sub-head">Lorem ipsum dolor sit.</h2>
  </div>
</div>

＆＃13;

Answer 1

您可以将叠加层section-one__overlay的顶部设置为导航栏的高度。

.section-one__overlay {
position: absolute;
padding: 0;
margin: 0;
/*-- change top --*/
top: 53px;
left: 0;
width: 100%;
height: 100%;
background: rgba(255,255,255,0.5);
}

＆＃13;

@import url('https://fonts.googleapis.com/css?family=Oswald:700');
html {
background: url(https://images.pexels.com/photos/28026/pexels-photo-28026.jpg?w=1260&h=750&auto=compress&cs=tinysrgb) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
* {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
body {
margin: 0;
font-family: 'Oswald', sans-serif;
}
h1 {
color: #cccccc;
}
/* Remove margins and padding from the list, and add a black background color */
ul.topnav {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #333;
}
/* Float the list items side by side */
ul.topnav li {
float: left;
}
/* Style the links inside the list items */
ul.topnav li a {
display: inline-block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
transition: 0.3s;
font-size: 17px;
}
/* Change background color of links on hover */
ul.topnav li a:hover {
background-color: #555;
}
/* Hide the list item that contains the link that should open and close the topnav on small screens */
ul.topnav li.icon {
display: none;
}
.spacer {
margin-bottom: 20%;
}
.primary-head {
font-size: 70px;
font-weight: 700;
}
.sub-head {
font-size: 50px;
font-weight: 700;
color: #9b9595;
margin-top: -70px;
}
.section-one__overlay {
position: absolute;
padding: 0;
margin: 0;
top: 53px;
left: 0;
width: 100%;
height: 100%;
background: rgba(255,255,255,0.5);
}

＆＃13;

<nav>
  <ul class="topnav" id="myTopnav">
    <li>
        <a href="" title="">Home</a>
    </li>
    <li>
        <a href="" title="">About</a>
    </li>
  </ul>
</nav>
<div class="section-one">
  <div class="section-one__overlay">
    <div class="spacer"></div>
    <h1 class="primary-head">Lorem ipsum dolor.</h1>
    <h2 class="sub-head">Lorem ipsum dolor sit.</h2>
  </div>
</div>

＆＃13;

Answer 2

＆＃13;

@import url('https://fonts.googleapis.com/css?family=Oswald:700');

html { 
  background: url(https://images.pexels.com/photos/28026/pexels-photo-28026.jpg?w=1260&h=750&auto=compress&cs=tinysrgb) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

body {
	margin: 0;
	font-family: 'Oswald', sans-serif;
}

h1{
	color: #cccccc;
}

/* Remove margins and padding from the list, and add a black background color */
ul.topnav {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

/* Float the list items side by side */
ul.topnav li {float: left;}

/* Style the links inside the list items */
ul.topnav li a {
    display: inline-block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    transition: 0.3s;
    font-size: 17px;
}

/* Change background color of links on hover */
ul.topnav li a:hover {background-color: #555;}

/* Hide the list item that contains the link that should open and close the topnav on small screens */
ul.topnav li.icon {display: none;}

.spacer {
	margin-bottom: 20%;
}

.primary-head {
	font-size: 70px;
	font-weight: 700;
}

.sub-head {
	font-size: 50px;
	font-weight: 700;
	color: #9b9595;
    margin-top: -70px;
}

.section-one__overlay {
	position: absolute;
    padding:0;
    margin:0;
    top:0;
    left:0;
    width: 100%;
    height: 100%;
    background:rgba(255,255,255,0.5);
    z-index:100;
}

nav{
      z-index: 10000;
    position: relative;
  }

＆＃13;

<nav>
		<ul class="topnav" id="myTopnav">
			<li><a href="" title="">Home</a></li>
			<li><a href="" title="">About</a></li>
		</ul>
	</nav>
	<div class="section-one">
		<div class="section-one__overlay">
			<div class="spacer"></div>
			<h1 class="primary-head">Lorem ipsum dolor.</h1>
			<h2 class="sub-head">Lorem ipsum dolor sit.</h2>
		</div>
	</div>

＆＃13;

请替换（.section-one__overlay）并在项目中添加（nav）以下代码

.section-one__overlay {
    position: absolute;
    padding:0;
    margin:0;
    top:0;
    left:0;
    width: 100%;
    height: 100%;
    background:rgba(255,255,255,0.5);
    z-index:100;
}

nav{
      z-index: 10000;
    position: relative;
  }

Answer 3

这是你想要做的事吗？

＆＃13;

@import url('https://fonts.googleapis.com/css?family=Oswald:700');
html {
background: url(https://images.pexels.com/photos/28026/pexels-photo-28026.jpg?w=1260&h=750&auto=compress&cs=tinysrgb) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
* {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
body {
margin: 0;
font-family: 'Oswald', sans-serif;
}
h1 {
color: #cccccc;
}
/* Remove margins and padding from the list, and add a black background color */
ul.topnav {
list-style-type: none;
margin: 0;
padding: 0;
position:relative;
overflow: hidden;
background-color: #333;
}
/* Float the list items side by side */
ul.topnav li {
float: left;
}
/* Style the links inside the list items */
ul.topnav li a {
display: inline-block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
transition: 0.3s;
font-size: 17px;
}
/* Change background color of links on hover */
ul.topnav li a:hover {
background-color: #555;
}
/* Hide the list item that contains the link that should open and close the topnav on small screens */
ul.topnav li.icon {
display: none;
}
.spacer {
margin-bottom: 18%;
}
.primary-head {
font-size: 70px;
font-weight: 700;
}
.sub-head {
font-size: 50px;
font-weight: 700;
color: #9b9595;
margin-top: -70px;
}
.section-one{
position:relative;
min-height:150px;
}
.section-one__overlay {
position: absolute;
padding: 0;
margin: 0;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: rgba(255,255,255,0.5);
}
.section-two__overlay {
rgba(255,255,255,0.8);
}

＆＃13;

<nav>
  <ul class="topnav" id="myTopnav">
    <li>
        <a href="" title="">Home</a>
    </li>
    <li>
        <a href="" title="">About</a>
    </li>
  </ul>
</nav>
<div class="section-one">
  <div class="section-one__overlay">
    <div class="spacer"></div>
    <h1 class="primary-head">Lorem ipsum dolor.</h1>
    <h2 class="sub-head">Lorem ipsum dolor sit.</h2>
  </div>
</div>
<div class="section-one ">
  <div class="section-one__overlay section-two__overlay">
    <div class="spacer"></div>
    <h1 class="primary-head">Lorem ipsum dolor.asd</h1>
    <h2 class="sub-head">Lorem ipsum dolor sit.</h2>
  </div>
</div>

＆＃13;

覆盖一个全宽覆盖和高度不包括导航栏的部分

3 个答案: