CSS：target :::伪元素导致其容器的背景颜色出现问题之前

Question

我正在使用:target::before伪元素和元素填充，以便将目标节正确地定位在固定的标题下，但是，这导致节容器的背景色超出了该节的顶部，并扩展到了前节的内容（并因此改变了节容器的背景颜色，从而无法实现视觉上划分内容的目的）。

[如何调整代码，以使部分:target::before伪元素的高度+负空白边在视觉上不会影响目标部分的background-color？

当然最好使用严格的CSS解决方案，但是可以接受JavaScript或JQuery。

相关CSS代码段：

.header_container {height: 6.8rem; margin: 0; padding: 0; width: 100vw; position: fixed; top: 0; display: block; z-index: 100;}
.container {width: 100%;}
.container:nth-of-type(even) {background-color: rgba(0,0,0,.06);}

/* Content positioned under fixed header */    
.main {margin-top: 6.8rem; width: 100%;} 
:target::before {height: 6.8rem; margin-top: -6.8rem; margin: 0; content: ""; display: block; visibility: hidden;}

/* Section padding */
.Section {padding-bottom: 5.5rem; width: 90%; margin: 0 auto;}
.Section:not(:target) {padding-top: 5.5rem;}
:target .services_header {padding-top: 5.5rem;}

完整代码：

html {
  overflow-x: hidden;
  margin-right: calc(100% - 100vw);
  font-size: 62.5%;
  line-height: 1.25;
}

body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow-x: hidden;
  font-size: 1.4rem;
  letter-spacing: .0107em;
  color: #888;
  background-color: white;
  font-family: Helvetica, Arial, sans-serif;
  text-align: left;
}

a:link,
a:visited,
a:hover,
a:focus {
  text-decoration: none;
  color: #fff;
}

a:hover,
a:focus {
  cursor: pointer;
}

* {
  box-sizing: border-box;
}

.header_container {
  width: 100vw;
  position: fixed;
  top: 0;
  display: block;
  z-index: 100;
  font-size: 1.6rem;
  background-color: #000;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.container {
  width: 100%;
}

.container:nth-of-type(even) {
  background-color: rgba(0, 0, 0, .06);
}

.Section {
  padding-bottom: 5.5rem;
  width: 90%;
  margin: 0 auto;
}

.Section:not(:target) {
  padding-top: 5.5rem;
  z-index: 90;
}

:target .services_header {
  padding-top: 5.5rem;
}

.Hcontainer {
  height: 6.8rem;
  margin: 0;
  padding: 0;
}

.main {
  margin-top: 6.8rem;
  width: 100%;
}

:target::before {
  margin: 0;
  content: "";
  display: block;
  visibility: hidden;
  height: 6.8rem;
  margin-top: -6.8rem;
}


/*** Text ***/

.logo {
  padding: 1rem 1.7rem 1rem 0;
  display: inline-block;
}

.services_header {
  padding: 0;
  position: relative;
  top: 0;
  left: 0;
  margin: 0 0 1.6rem 0;
  font-size: 2rem;
  color: #000;
}

.copy_description {
  margin: 1rem 0 0 0;
  padding: 0;
  line-height: 1.875;
}


/*** Menu  ***/

nav {
  margin: 0 auto;
  width: 90%;
  position: relative;
  display: inline-block;
  z-index: 100;
  padding: 1.6rem 0;
  line-height: 3.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  line-height: 3.2rem;
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
}

nav li {
  display: block;
  float: left;
  padding: .5rem 0rem;
  position: static;
  flex: 0 1 auto;
  margin: 0rem;
  max-width: 13rem;
  line-height: 1.29;
  transition: .2s ease;
}

nav ul>li:not(:last-child) {
  margin-right: 3.5rem;
}

nav li a {
  padding: 0;
  line-height: 1.29;
  align-items: flex-start;
  display: flex;
}

<div id="header" class="header_container Hcontainer">
  <nav>
    <span class="logo"><a href="#">LOGO</a></span>
    <ul>
      <li><a href="#product">PRODUCT</a></li>
      <li><a href="#strategy">STRATEGY</a></li>
      <li><a href="#marketing">MARKETING</a></li>
    </ul>
  </nav>
</div>

<div class="main">
  <div class="container">
    <div id="product" class="Section">
      <div class="services_header">PRODUCT</div>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </div>
  </div>
  <div class="container">
    <div id="strategy" class="Section">
      <div class="services_header">STRATEGY</div>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </div>
  </div>

  <div class="container">
    <div id="marketing" class="Section">
      <div class="services_header">MARKETING</div>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </div>
  </div>

</div>

Answer 1

考虑节的after伪元素以应用背景色，您可以在:target上轻松控制其高度>

相关代码：

.container:nth-of-type(even) .Section:after {
  content:"";
  position:absolute;
  top:0;
  /* To cover the 5% removed from width on each side */
  left:-11%; /* more precisely it's 100/9*/ 
  right:-11%;
  /**/
  bottom:0;
  background-color: rgba(0, 0, 0, .06);
}
.container:nth-of-type(even) .Section:target:after {
   top:6.8rem; /* The height of the before */
}
.Section {
   position:relative; /* Added */
   padding-bottom:5.5rem; 
   width: 90%; 
   margin: 0 auto; 
}

完整代码：

html {
  overflow-x: hidden;
  margin-right: calc(100% - 100vw);
  font-size: 62.5%;
  line-height: 1.25;
}

body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow-x: hidden;
  font-size: 1.4rem;
  letter-spacing: .0107em;
  color: #888;
  background-color: white;
  font-family: Helvetica, Arial, sans-serif;
  text-align: left;
}

a:link,
a:visited,
a:hover,
a:focus {
  text-decoration: none;
  color: #fff;
}

a:hover,
a:focus {
  cursor: pointer;
}

* {
  box-sizing: border-box;
}

.header_container {
  width: 100vw;
  position: fixed;
  top: 0;
  display: block;
  z-index: 100;
  font-size: 1.6rem;
  background-color: #000;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.container {
  width: 100%;
}

.container:nth-of-type(even) .Section:after {
  content:"";
  position:absolute;
  top:0;
  left:-11%;
  right:-11%;
  bottom:0;
  background-color: rgba(0, 0, 0, .06);
}
.container:nth-of-type(even) .Section:target:after {
   top:6.8rem;
}

.Section {
  padding-bottom: 5.5rem;
  width: 90%;
  margin: 0 auto;
  position:relative;
}

.Section:not(:target) {
  padding-top: 5.5rem;
  z-index: 90;
}

:target .services_header {
  padding-top: 5.5rem;
}

.Hcontainer {
  height: 6.8rem;
  margin: 0;
  padding: 0;
}

.main {
  margin-top: 6.8rem;
  width: 100%;
}

:target::before {
  margin: 0;
  content: "";
  display: block;
  visibility: hidden;
  height: 6.8rem;
  margin-top: -6.8rem;
}


/*** Text ***/

.logo {
  padding: 1rem 1.7rem 1rem 0;
  display: inline-block;
}

.services_header {
  padding: 0;
  position: relative;
  top: 0;
  left: 0;
  margin: 0 0 1.6rem 0;
  font-size: 2rem;
  color: #000;
}

.copy_description {
  margin: 1rem 0 0 0;
  padding: 0;
  line-height: 1.875;
}


/*** Menu  ***/

nav {
  margin: 0 auto;
  width: 90%;
  position: relative;
  display: inline-block;
  z-index: 100;
  padding: 1.6rem 0;
  line-height: 3.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  line-height: 3.2rem;
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
}

nav li {
  display: block;
  float: left;
  padding: .5rem 0rem;
  position: static;
  flex: 0 1 auto;
  margin: 0rem;
  max-width: 13rem;
  line-height: 1.29;
  transition: .2s ease;
}

nav ul>li:not(:last-child) {
  margin-right: 3.5rem;
}

nav li a {
  padding: 0;
  line-height: 1.29;
  align-items: flex-start;
  display: flex;
}

<div id="header" class="header_container Hcontainer">
  <nav>
    <span class="logo"><a href="#">LOGO</a></span>
    <ul>
      <li><a href="#product">PRODUCT</a></li>
      <li><a href="#strategy">STRATEGY</a></li>
      <li><a href="#marketing">MARKETING</a></li>
    </ul>
  </nav>
</div>

<div class="main">
  <div class="container">
    <div id="product" class="Section">
      <div class="services_header">PRODUCT</div>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </div>
  </div>
  <div class="container">
    <div id="strategy" class="Section">
      <div class="services_header">STRATEGY</div>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </div>
  </div>

  <div class="container">
    <div id="marketing" class="Section">
      <div class="services_header">MARKETING</div>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
      <p class="copy_description">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </div>
  </div>

</div>