Question

我有一个示例练习，其中侧边栏导航在屏幕左侧固定。我说content-div应该有一个绝对位置到身体，还有一个 padding-left 和侧边栏的宽度，这样我就能集中我的内容在可见区域（没有侧边栏的宽度）。

现在，当我尝试添加一个媒体查询时，“当屏幕小于1000px时，补充工具栏应该消失，内容区域的填充应该变为0（这样它就会在正常的屏幕宽度区域居中）“它不起作用。

我是html和css的初学者

这是我的代码：

body {
  font-family: 'Oswald', sans-serif;
  padding: 0;
  margin: 0;
  background-color: #35af7e;
}

@media screen and (max-width: 1000px) {
  .Sidebar {
    left: -10rem;
  }

  .body {
    padding-left: 0;
    padding: 0;
  }


}

#flex {
  display: flex;
}

/* MEDIA QUERY FIX: NAVIC ; BODY-paddingleft ;  */

.NavIc {
  left: 1rem;
  top: 1rem;
  height: 30px;
  width: 30px;
  background-color: red;
  border-radius: 3px;
  z-index: 4;
  position: fixed;
  cursor: pointer;
}

.NavIc:hover .Sidebar {
  background-color: red;
}


.Sidebar {
  position: fixed;
  width: 10rem;
  height: 100%;
  background: #E9D758;
  color: white;
  z-index: 3;
  display: flex;
  flex-direction: column;
  transition: 200ms ease-in-out;
}

.space {
  flex-grow: 1;
  width: auto;
}

.Nav {
  list-style-type: none;
  display: block;
  width: 100%;
  padding: 0;
  font-size: 1.5rem;
  z-index: 2;
  flex-grow: 18;
}

ul li {
  box-sizing: border-box;
  padding: 0.7rem 0 0.7rem 1rem;
  position: relative;
  transition: 150ms ease-in-out;
}

ul li:hover {
  background-color: white;
  color: black;
  transform: scale(1.07) translate(0.3rem);
  cursor: pointer;
}

.footnotes {
  flex-grow: 1;
  box-sizing: border-box;
  padding: 0 1rem 0 1rem;
}

hr {
  border-style: solid;
  color: white;
}

.body {
  position: absolute;
  width: 100%;
  padding-left: 10rem;
  box-sizing: border-box;
  top: 0;
  color: white;
  transition: 200ms ease-in-out;
}

.mid {
  position: relative;
  width: 60%;
  left: 50%;
  transform: translate(-50%);
  font-size: 1.5rem;
}


.img {
  position: relative;
  max-width: 500px;
  height: auto;
  left: 50%;
  transform: translate(-50%);
  transition: 200ms ease-in-out;
}

.Logo {
  position: relative;
  left: 50%;
  transform: translate(-50%);
  max-width: 100%;
  height: auto;
  padding: 5rem 0 5rem 0;
}

.mid > hr {
  width: 80%;
}

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Sidebar</title>

    <link rel="stylesheet" style="text/css" href="sidebar.css">
    <link href="https://fonts.googleapis.com/css?family=Oswald" rel="stylesheet">
  </head>
  <body>

    <div class="NavIc">
    </div>

    <div class="Sidebar">
      <div class="space">
      </div>
      <ul class="Nav">
        <li>Home</li>
        <li>Gallery</li>
        <li>Our Team</li>
        <li>Contact</li>
      </ul>

      <div class="footnotes">
        <hr>
        <p>blablabla<br>
        All rights reserved</p>
        <p>blablabla</p>
      </div>
    </div>

    <div class="body">
      <div class="mid">
        <div class="img">
          <img src="Logo.svg" alt="Logo" class="Logo">
        </div>

        <hr>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing 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.</p><p>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. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor.</p><p>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.</br>
        <hr>
 
      </div>
    </div>

  </body>
</html>

Answer 1

在媒体查询中，使用display: none;隐藏侧边栏，然后设置内容的padding: 0px;。就是这样。

@media only screen and (max-width: 1000px) {
 .Sidebar{
 display: none;
 }
 .body{
 display: block;
 padding: 0px;
 }
}

Answer 2

因为.body中的@media (max-width: 1000px)规则正在被覆盖。使用！important或学习一些CSS特异性/优先级。

＆＃13;

body {
  font-family: 'Oswald', sans-serif;
  padding: 0;
  margin: 0;
  background-color: #35af7e;
}

@media screen and (max-width: 1000px) {
  .Sidebar {
    left: -10rem;
  }

  .body {
    padding-left: 0 !important;
    padding: 0;
  }


}

#flex {
  display: flex;
}

/* MEDIA QUERY FIX: NAVIC ; BODY-paddingleft ;  */

.NavIc {
  left: 1rem;
  top: 1rem;
  height: 30px;
  width: 30px;
  background-color: red;
  border-radius: 3px;
  z-index: 4;
  position: fixed;
  cursor: pointer;
}

.NavIc:hover .Sidebar {
  background-color: red;
}


.Sidebar {
  position: fixed;
  width: 10rem;
  height: 100%;
  background: #E9D758;
  color: white;
  z-index: 3;
  display: flex;
  flex-direction: column;
  transition: 200ms ease-in-out;
}

.space {
  flex-grow: 1;
  width: auto;
}

.Nav {
  list-style-type: none;
  display: block;
  width: 100%;
  padding: 0;
  font-size: 1.5rem;
  z-index: 2;
  flex-grow: 18;
}

ul li {
  box-sizing: border-box;
  padding: 0.7rem 0 0.7rem 1rem;
  position: relative;
  transition: 150ms ease-in-out;
}

ul li:hover {
  background-color: white;
  color: black;
  transform: scale(1.07) translate(0.3rem);
  cursor: pointer;
}

.footnotes {
  flex-grow: 1;
  box-sizing: border-box;
  padding: 0 1rem 0 1rem;
}

hr {
  border-style: solid;
  color: white;
}

.body {
  position: absolute;
  width: 100%;
  padding-left: 10rem;
  box-sizing: border-box;
  top: 0;
  color: white;
  transition: 200ms ease-in-out;
}

.mid {
  position: relative;
  width: 60%;
  left: 50%;
  transform: translate(-50%);
  font-size: 1.5rem;
}


.img {
  position: relative;
  max-width: 500px;
  height: auto;
  left: 50%;
  transform: translate(-50%);
  transition: 200ms ease-in-out;
}

.Logo {
  position: relative;
  left: 50%;
  transform: translate(-50%);
  max-width: 100%;
  height: auto;
  padding: 5rem 0 5rem 0;
}

.mid > hr {
  width: 80%;
}

＆＃13;

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Sidebar</title>

    <link rel="stylesheet" style="text/css" href="sidebar.css">
    <link href="https://fonts.googleapis.com/css?family=Oswald" rel="stylesheet">
  </head>
  <body>

    <div class="NavIc">
    </div>

    <div class="Sidebar">
      <div class="space">
      </div>
      <ul class="Nav">
        <li>Home</li>
        <li>Gallery</li>
        <li>Our Team</li>
        <li>Contact</li>
      </ul>

      <div class="footnotes">
        <hr>
        <p>blablabla<br>
        All rights reserved</p>
        <p>blablabla</p>
      </div>
    </div>

    <div class="body">
      <div class="mid">
        <div class="img">
          <img src="Logo.svg" alt="Logo" class="Logo">
        </div>

        <hr>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing 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.</p><p>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. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor.</p><p>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.</br>
        <hr>
 
      </div>
    </div>

  </body>
</html>

＆＃13;

添加屏幕宽度媒体查询时填充更改不起作用

2 个答案: