我不知道，但我的段落在我的导航栏后面我是 html 和 css 新手下面是代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title> First App </title>
<link rel="stylesheet" href ="style.css">
</head>
<body>
<header>
<nav>
<ul>
<li class = "a"> <a href = "#"> Google </a></li>
<li class = "b"> <a href = "#"> Youtube </a></li>
<li> <a href = "#"> Facebook </a></li>
<li> <input type="text"> <button> Press Here </button></li>
</ul>
</nav>
</header>
<p>
Lorem, ipsum dolor sit amet consectetur adipisicin
g elit. Est tempora quasi ipsum commodi
. Atque ut officia …