У меня проблема с моим отзывчивым меню. Пока я открываю бургермену, я могу прокрутить вниз и увидеть содержимое страницы. Единственное содержимое, которое я вижу, это те три коробки, и я не знаю почему! Я опущу код для этих ящиков и, может быть, вы можете сказать, почему. Если что-то неясно, пожалуйста, дайте мне знать, чтобы я мог выполнить ваши запросы. PS Я загружаю GIF, который показывает, что происходит. 
const hamburger = document.querySelector(".hamburger");
const navLinks = document.querySelector(".nav-links");
const links = document.querySelectorAll(".nav-links li");
hamburger.addEventListener('click', () => {
navLinks.classList.toggle('open');
links.forEach(link => {
link.classList.toggle("fade");
});
});
* {
margin: 0px;
padding: 0px;
box-sizing: border-box;
}
body {
font-family: 'Poppins', sans-serif;
/*background-color: #ffffff;
background-color: #d8e7ff;
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background-attachment: fixed;
background-size: cover;*/
}
button {
font-family: 'Poppins', sans-serif;
}
header {
display: flex;
width: 100%;
margin: auto;
align-items: center;
}
.logo-container, .nav-links {
display: flex;
}
.logo-container {
flex: 1;
height: 10vh;
}
.logo {
font-weight: 400;
margin: 5px;
}
nav {
flex: 1;
height: 10vh;
background: #3C3664;
}
.nav-links li a {
color: white;
}
.nav-links {
display: flex;
justify-content: space-around;
list-style: none;
align-items: center;
width: 50%;
height: 100%;
margin-left: auto;
}
.nav-link {
color: #5f5f79;
font-size: 18px;;
}
/* Removing the underline of navigation bar */
.nav-links a {
text-decoration: none;
}
.presentation {
display: flex;
width: 90%;
margin: auto;
min-height: 80vh;
align-items: center;
}
.introduction {
flex: 1;
animation: drop 0.5s ease;
}
.welcometext h1 {
font-size: 17px;
margin-top: 5px;
color: #3C3664;
font-weight: 300;
letter-spacing: 8px;
}
.intro-text h1 {
font-size: 44px;
font-weight: 700;
background: linear-gradient(to right, #3C3664, #6f6f89);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
}
.intro-text p {
font-size: 18px;
margin-top: 5px;
color: #3C3664;
}
.cta {
padding: 50px 0px 0px 0px;
}
.cta-tmm {
background-color: #3C3664;
width: 150px;
height: 50px;
cursor: pointer;
font-size: 16px;
color: white;
border: none;
}
.cover {
flex: 1;
display: flex;
justify-content: center;
height: 55vh;
}
.cover img {
height: 100%;
animation: drop 0.5s ease;
}
.text {
display: block;
width: 90%;
margin: auto;
margin-top: 70px;
min-height: 10vh;
align-items: center;
text-align: center;
}
.text h1 {
font-size: 20px;
letter-spacing: 8px;
font-weight: 300;
color: #3C3664;
}
.text p {
font-size: 25px;
font-weight: 600;
color: #3C3664;
}
.text img {
width: 250px;
}
.services {
display: flex;
height: 60vh;
width: 100%;
margin: auto;
align-items: center;
text-align: center;
flex-direction: row;
justify-content: space-around;
position: absolute;
/* centering the parent div
left: 50%;
transform: translateX(-50%);
*/
}
.qm:hover img {
filter: invert(100%);
-webkit-filter: invert(100%);
}
/* If icon color is not black or white, then we just set the brightness to 0 which sets
the color of img to black and then we just invert it to 0 which basically means
that whatever the actual color is just make it the total opposite of that */
.qm:hover img {
filter: brightness(0) invert(1);
}
.qm:hover {
background-color: #3C3664;
cursor: pointer;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.8);
height: 63%;
width: 18;
}
.qm:hover h1 {
color: white;
}
.qm:hover p {
color: white;
}
.audit:hover img {
filter: brightness(0) invert(1);
}
.audit:hover {
background-color: #3C3664;
cursor: pointer;
box-shadow: 5px 7px 18px rgb(0, 0, 0, 0.8);
height: 63%;
width: 18;
}
.audit:hover h1 {
color: white;
}
.audit:hover p {
color: white;
}
.pm:hover img {
filter: brightness(0) invert(1);
}
.pm:hover {
background-color: #3C3664;
cursor: pointer;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.8);
height: 63%;
width: 18;
}
.pm:hover h1 {
color: white;
}
.pm:hover p {
color: white;
}
.qm {
height: 60%;
background: #fcfcfc;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.2);
border-radius: 20px;
padding: 0 1rem;
width: 15%;
min-width: 10%;
position: relative;
overflow: hidden;
text-align: center;
}
.audit {
height: 60%;
background: #fcfcfc;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.2);
border-radius: 20px;
padding: 0 1rem;
width: 15%;
position: relative;
overflow: hidden;
}
.pm {
height: 60%;
background: #fcfcfc;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.2);
border-radius: 20px;
padding: 0 1rem;
width: 15%;
position: relative;
overflow: hidden;
}
.qmheading {
width: 100%;
height: 30%;
color: #3C3664;
}
.auditheading {
width: 100%;
height: 30%;
color: #3C3664;
}
.pmheading {
width: 100%;
height: 30%;
color: #3C3664;
}
.qmimage {
width: 100%;
height: 40%;
}
.auditimage {
width: 100%;
height: 40%;
}
.pmimage {
width: 100%;
height: 40%;
}
.qmimage img {
width: 100%;
height: 100%;
width: 85px;
}
.auditimage img {
width: 100%;
height: 100%;
width: 85px;
}
.pmimage img {
width: 100%;
height: 100%;
width: 70px;
}
.qmparagraph {
width: 100%;
height: 30%;
text-align: left;
}
.auditparagraph {
width: 100%;
height: 30%;
text-align: left;
}
.pmparagraph {
width: 100%;
height: 30%;
text-align: left;
}
.qm h1, .audit h1, .pm h1 {
font-weight: 600;
font-size: 22px;
}
.audit h1 {
padding-top: 20px;
}
.qm p, .audit p, .pm p {
padding-top: 20px;
font-weight: 600;
color: #3C3664;
font-size: 13px;
}
@keyframes drop {
0%{
opacity: 0;
transform: translateY(-50px);
}
100%{
opacity: 1;
transform: translateY(0px);
}
}
@media screen and (max-width: 768px) {
.line {
width: 30px;
height: 3px;
background: white;
margin: 5px;
}
nav {
position: relative;
}
.hamburger {
position: absolute;
cursor: pointer;
right: 5%;
top: 50%;
transform: translate(-5%, -50%);
z-index: 2;
}
.services {
z-index: 0;
}
.nav-links {
position: fixed;
background: #3C3664;
height: 100vh;
width: 100%;
flex-direction: column;
clip-path: circle(100px at 90% -10%);
-webkit-clip-path: circle(100px at 90% -10%);
transition: all 1s ease-out;
pointer-events: none;
}
.nav-links.open {
clip-path: circle(1200px at 90% -10%);
-webkit-clip-path: circle(1200px at 90% -10%);
pointer-events: all;
}
/* Changing the color from violet to white after the burgermenu shows up */
.nav-links li a {
color: white;
}
.nav-links li {
opacity: 0;
}
.nav-links li a {
font-size: 20px;
}
.nav-links li:nth-child(1){
transition: all 0.5s ease 0.2s;
}
.nav-links li:nth-child(2){
transition: all 0.5s ease 0.4s;
}
.nav-links li:nth-child(3){
transition: all 0.5s ease 0.6s;
}
.nav-links li:nth-child(4){
transition: all 0.5s ease 0.8s;
}
li.fade {
opacity: 1;
}
.presentation {
flex-direction: column;
}
.services {
flex-direction: column;
}
.introduction {
margin-top: 5vh;
text-align: center;
}
.text h1 {
font-size: 20px;
}
.text p {
font-size: 25px;
}
.intro-text img {
width: 30%;
}
.qm {
height: 200vh;
background: #fcfcfc;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.2);
border-radius: 20px;
padding: 0 1rem;
width: 55%;
position: relative;
overflow: hidden;
margin-top: 5%;
}
.audit {
height: 200vh;
background: #fcfcfc;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.2);
border-radius: 20px;
padding: 0 1rem;
width: 55%;
position: relative;
overflow: hidden;
margin-top: 5%;
}
.pm {
height: 200vh;
background: #fcfcfc;
box-shadow: 5px 7px 18px rgba(0, 0, 0, 0.2);
border-radius: 20px;
padding: 0 1rem;
width: 55%;
position: relative;
overflow: hidden;
margin-top: 5%;
}
.audit h1 {
font-size: 17px;
}
.intro-text h1 {
font-size: 25px;
}
.intro-text p {
font-size: 14px;
}
.cta {
padding: 10px 0px 0px 0px;
}
.cover img {
height: 60%;
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie-edge">
<link href="https://fonts.googleapis.com/css?family=Poppins:400,500&display=swap" rel="stylesheet">
<link rel="stylesheet" href="./style.css" />
<title>QM-SÜD GmbH Qualitätsmanagement</title>
</head>
<body>
<header>
<!--
<div class="logo-container">
<img src="./img/logo.svg" alt="logo">
<h4 class="logo"> QM SÜD</h4>
</div>
-->
<nav>
<div class="hamburger">
<div class="line"></div>
<div class="line"></div>
<div class="line"></div>
</div>
<ul class="nav-links">
<li><a class="nav=link" href="index.html">Home</a></li>
<li><a class="nav=link" href="services.html">Services</a></li>
<li><a class="nav=link" href="#">About Us</a></li>
<li><a class="nav=link" href="#">Credentials</a></li>
</ul>
</nav>
</header>
<!-- Actaul Content -->
<main>
<section class="presentation">
<div class="introduction">
<div class="welcometext">
<h1>
WELLCOME
</h1>
</div>
<div class="intro-text">
<h1>Optimal Solution for Your Products</h1>
<img src="./img/line.png" alt="" class="lineimage">
<p>
Ensuring optimal solution for your
Quality Management.
</p>
</div>
<div class="cta">
<!-- cta-tmm stands for call to action - tell me more -->
<button class="cta-tmm">Tell me more</button>
</div>
</div>
<div class="cover">
<img src="./img/homeimg.svg" alt="homepageimg">
</div>
</section>
<div class="text">
<h1>
SERVICES
</h1>
<div class="line">
<!-- <img src="./img/line.png" alt="line"> -->
</div>
<p>
We have specialized <br>in the following areas
</p>
<img src="./img/line.png" alt="">
</div>
<div class="services">
<!-- Quality Management -->
<div class="qm">
<div class="qmheading">
<h1>
Quality Management
</h1>
</div>
<div class="qmimage">
<img src="./img/qmimage.svg" alt="" class="qmimage1">
</div>
<div class="qmparagraph">
<p>
ISO 9001 2015, <br>
ISO 17025 & ISO 13485
</p>
</div>
</div>
<!-- Auditing -->
<div class="audit">
<div class="auditheading">
<h1>
Auditing
</h1>
</div>
<div class="auditimage">
<img src="./img/auditimage.svg" alt="">
</div>
<div class="auditparagraph">
<p>
INTERNAL AUDITING &
EXTERNAL AUDITING,
LEAD AUDITOR
</p>
</div>
</div>
<!-- Project Management -->
<div class="pm">
<div class="pmheading">
<h1>
Project Management
</h1>
</div>
<div class="pmimage">
<img src="./img/pmimage.svg" alt="">
</div>
<div class="pmparagraph">
<p>
QUALITY MANAGEMENT &
CONTROLLING
</p>
</div>
</div>
</div>
<script src="app.js">
</script>
</main>
</body>
</html>