下面是我的网站关于度假目的地(纽约(的HTML代码。到目前为止，我已经制作了一个导航栏，并用两个背景图像实现了视差滚动。然后我在运行代码时发现，导航栏和第一个背景图像后面有一个空白，我不知道如何解决这个问题。我试过改变填充和边距，但没有效果：(非常感谢您的帮助！
body, html{
height: 100%;
margin: 0;
padding: 0;
font-family: 'Work Sans', sans-serif;
font-weight: 400;
}
.container {
width: 80%;
margin: 0 50px;
}
header{
background:plum;
position: relative;
}
header::after{
content: "";
display: table;
clear:both;
}
.logo{
width: 100px;;
height: 60px;
float: left;
padding: 0px;
}
nav{
float: inline-end;
overflow: auto;
}
nav ul{
margin: 0;
padding: 0;
list-style: none;
}
nav li{
display: inline-block;
margin-left: 70px;
padding-top: 20px;
font-size: 18px;
position: relative;
}
nav a{
color: black;
text-decoration: none;
text-transform: uppercase;
}
nav a:hover{
color: rgb(0, 0, 0);
}
nav a::before{
content: "";
display: block;
height: 3px;
background-color: rgb(0, 0, 0);
position: absolute;
top: 0;
width: 0%;
transition: all ease-in-out 250ms;
}
nav a:hover::before{
width: 100%;
}
.bg-one{
background-image: url("bg-one.jpg");
height: 100%;
padding-top: 0;
background-repeat: no-repeat;
background-attachment: fixed;
background-position: center;
background-size: cover;
position:relative;
}
.transbox{
padding: 10px;
width: 30%;
background-color: white;
border: 10px double black;
opacity: 0.6;
margin-left: 50px;
margin-right: auto;
margin-top: 4%;
margin-bottom: auto;
display: block;
}
.transbox p{
margin: 5%;
font-weight: bold;
color: black;
}
h1{
text-align: center;
font-size: 65px;
}
.first-block{
height: 100px;
background-color:rgb(109, 176, 243);
text-align: center;
border: 10px double white;
padding-bottom: 60px;
vertical-align: auto;
}
h3{
text-transform: uppercase;
font-size: 50px;
text-align: center;
color: rgb(13, 97, 170);
}
.bg-two{
background-image: url("bg-two.jpg");
height: 100%;
background-repeat: no-repeat;
background-attachment: fixed;
background-position: center;
background-size: cover;
position: relative;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>New York</title>
<link rel="stylesheet" href="main.css">
<link rel="preconnect" href="https://fonts.gstatic.com">
<link href="https://fonts.googleapis.com/css2?family=Work+Sans:wght@400&display=swap"
rel="stylesheet">
</head>
<body>
<header>
<div class="container">
<img src="nyc-logo.png" alt="logo" class="logo">
<nav>
<ul>
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Gallery</a></li>
<li><a href="#">Contacts</a></li>
</ul>
</nav>
</div>
</header>
<div class="bg-one">
<div class="transbox">
<h1>NEW YORK</h1>
</div>
</div>
<div class="first-block">
<h3>Welcome to the city that never sleeps...</h3>
</div>
<div class="bg-two"></div>
</body>
</html>我不完全理解你的意思是什么是空白，但尝试删除中的margin-top:4%
.transbox{
padding: 10px;
width: 30%;
background-color: white;
border: 10px double black;
opacity: 0.6;
margin-left: 50px;
margin-right: auto;
margin-bottom: auto;
display: block;
}