你好,我有问题,当我做标题使用html和css。我的页眉在固定的位置,但内容被我的页眉遮住了。当我运行它时,我希望我的内容位置在标题下。还有一点,我将页眉宽度设置为100%,但它会向右移动,这样就不会覆盖屏幕上的整个宽度。已更新

<style>
@media(min-width: 468px) {
body{
background-color: aqua;
}
.container-1{
display: flex;
/*
align-items: flex-start; -->box 1 lebih sempit ke atas
align-items: flex-end; -->box 1 lebih sempit ke bawah
align-items: center; -->box 1 lebih sempit ke tengah (atas bawah)
flex-direction: column; -->flex box menjadi kolom
*/
}
.container-2{
display: flex;
/*
justify-content: flex-end;
justify-content: flex-start;
*/
justify-content: space-between; /*ada spasi diantara kotak*/
}
}
.container-3{
display: flex;
flex-wrap: wrap;
}
.container-1 div, .container-2 div, .container-3 div{
border:1px #000000 solid;
padding:10px;
}
.box-1{
flex:2;
order:2;
}
.box-2{
flex:1;
order:1;
}
.box-3{
flex: 1;
order:3;
}
.container-2-box{
flex-basis:20%;
}
.container-3-box{
flex-basis: 10%;
}
header{
padding: 0.5rem;
text-align: center;
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: beige;
position: fixed;
width: 100%;
margin:0;
}
.whole-container{
margin-top:2.0rem;
}
</style><html>
<head>
<meta charset='utf-8'>
<meta http-equiv='X-UA-Compatible' content='IE=edge'>
<title>Flexbox</title>
<meta name='viewport' content='width=device-width, initial-scale=1'>
</head>
<body>
<header>
<h1> Flexbox</h1>
</header>
<div class="whole-container">
<div class="container-1">
<div class="box-1">
<h3>Box 1</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="box-2">
<h3>Box 2</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="box-3">
<h3>Box 3</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
</div>
<div class="container-2">
<div class="container-2-box">
<h3>Box 4</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="container-2-box">
<h3>Box 5</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="container-2-box">
<h3>Box 6</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
</div>
<div class="container-3">
<div class="container-3-box">
<h3>Box 7</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="container-3-box">
<h3>Box 8</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="container-3-box">
<h3>Box 9</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="container-3-box">
<h3>Box 10</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="container-3-box">
<h3>Box 11</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
<div class="container-3-box">
<h3>Box 12</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>
</div>
</div>
</body>
</html>
发布于 2020-02-19 23:27:04
在看不到HTML代码的情况下,这是一种猜测,但我会试一试。
向元素添加position: fixed将使其位于其他内容之上。该元素将从文档流中取出。所以重叠是很自然的行为。
若要防止隐藏内容,应向框的父级添加填充。我猜当您添加以下代码时,它就解决了这个问题
body {
padding-top: 3rem; /* should be at least the height of the header*/
}关于头部位置的第二个问题可以通过以下代码来解决:
/* option 1, add a left position:*/
header {
...
left: 0;
}
/* option 2, remove the width, use left and right position instead: */
header {
...
/* width: 100%; remove this line */
left: 0;
right: 0;
}发布于 2020-02-19 23:55:42
body { margin: 0; }
body {
margin: 0;
}
header {
padding: 0.5rem;
text-align: center;
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: beige;
position: fixed;
width: 100%;
/*not cover whole width*/
margin: 0;
}
.whole-container {
margin-top: 2.0rem;
}<body>
<header>
0000
</header>
</body>
https://stackoverflow.com/questions/60303562
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