如何移除视差滚动效果顶部的白色条?

如果我想在视差滚动效果中改变文本的背景颜色，它的顶部会有一个白色条。我试着改变我写下的每一种颜色，但它没有消失。你可以看到这里的白色条。我是否需要在CSS中改变颜色，或者我是否需要创建一个新的div?

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box;}
.parallax {
background-image: url("pexels-philippe-donn-1169754.jpg");
/* specific heigh */
min-height: 500px; 
/*parallax scrolling effect */
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
body {
margin: 0;
font-family: Arial, Helvetica, sans-serif;
}
.header {
overflow: hidden;
background-color: #f1f1f1;
padding: 20px 10px;
}
.header a {
float: left;
color: black;
text-align: center;
padding: 12px;
text-decoration: none;
font-size: 18px;
line-height: 25px;
border-radius: 4px;
}
.header a.logo {
font-size: 25px;
font-weight: bold;
}
.header a:hover {
background-color: #ddd;
color: black;
}
.header a.active {
background-color: dodgerblue;
color: white;
}
.header-right {
float: right;
}
@media screen and (max-width: 500px) {
.header a {
float: none;
display: block;
text-align: left;
}
.header-right {
float: none;
}
}
</style>
</head>
<body>
<div class="header">
<a href="#default" class="logo">Space, Universe And Other Stuff</a>
<div class="header-right">
<a class="active" href="#home">Home</a>
<a href="#chat">Chat</a>
<a href="#personalprojects">Personal Projects</a>
<a href="#contact">Contact</a>
<a href="#about">About</a>
</div>
</div>
<div class="parallax"></div>
<div style="height:700px;background-color:lightgrey;font-size:36px">
<div style="padding-left:20px">
<h1>Text</h1>
<p>Text....</p>
<p>More text...</p>
</div>
<div class="parallax"></div>
</body>
</html>

h1的默认页边距导致了这个问题。

....
<div style="padding-left:20px">
<h1 style="margin-top:0px">Text</h1>
<p>Text....</p>
<p>More text...</p>
</div>
....

你应该添加一个类而不是添加style属性

这似乎是<h1>标签的默认外边距突出顶部。试着用

清除边距

h1 {margin: 0;}

如果你确实需要<h1>上方的一些灰色空间，你可以添加填充代替。

在h1元素上设置margin: 0;

* {
box-sizing: border-box;
}
h1 {
margin: 0;
}
.parallax {
background-image: url("https://i0.wp.com/www.fmxexpress.com/wp-content/uploads/2020/09/pexels-philippe-donn-1169754.jpg");
/* specific heigh */
min-height: 500px;
/*parallax scrolling effect */
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
body {
margin: 0;
font-family: Arial, Helvetica, sans-serif;
}
.header {
overflow: hidden;
background-color: #f1f1f1;
padding: 20px 10px;
}
.header a {
float: left;
color: black;
text-align: center;
padding: 12px;
text-decoration: none;
font-size: 18px;
line-height: 25px;
border-radius: 4px;
}
.header a.logo {
font-size: 25px;
font-weight: bold;
}
.header a:hover {
background-color: #ddd;
color: black;
}
.header a.active {
background-color: dodgerblue;
color: white;
}
.header-right {
float: right;
}
@media screen and (max-width: 500px) {
.header a {
float: none;
display: block;
text-align: left;
}
.header-right {
float: none;
}
}

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div class="header">
<a href="#default" class="logo">Space, Universe And Other Stuff</a>
<div class="header-right">
<a class="active" href="#home">Home</a>
<a href="#chat">Chat</a>
<a href="#personalprojects">Personal Projects</a>
<a href="#contact">Contact</a>
<a href="#about">About</a>
</div>
</div>
<div class="parallax"></div>
<div style="height:700px;background-color:lightgrey;font-size:36px">
<div style="padding-left:20px">
<h1>Text</h1>
<p>Text....</p>
<p>More text...</p>
</div>
<div class="parallax"></div>
</body>
</html>

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