我正在研究CSS并创建一个响应式网页。我已经开始从事媒体查询工作。当我最大化屏幕时，所有功能都可以按预期工作，但是当我减小其尺寸时，将隐藏不适合视口的内容，并且在其位置保留空白。可以看到该空间将屏幕滚动到一侧。为什么出现该空间而不是其余内容？我也不明白为什么我的内容不能显示在屏幕上，因为我使用的是元素宽度的百分比值。我的代码如下：
@charset "UTF-8";
@import url('https://fonts.googleapis.com/css?family=Doppio+One|Open+Sans&display=swap');
html, body, *, *::before, *::after {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html, body{
width: 99.13vw;
}
body{
font-family: 'Open Sans', sans-serif;
margin: 0;
}
h2, h3{
margin-top: 10px;
margin-bottom: 10px;
}
a{
text-decoration: none;
transition: 0.2s linear;
}
header{
background-color: rgb(93, 158, 76);
display: flex;
align-items: center;
padding: 10px 30px;
width: 100%;
}
header img{
width: 45px;
}
header h1{
font-family: 'Doppio One', cursive;
margin-left: 10px;
color: rgb(214, 245, 210);
}
nav ul{
display: flex;
list-style: none;
}
nav ul li a{
margin-left: 55px;
}
nav a{
color: rgb(230, 245, 229);
font-size: 17px;
}
nav a:hover{
background-color: rgb(143, 182, 135);
padding: 10px 15px;
margin: 0 -15px 0 40px;
}
nav img{
display: none;
width: 30px;
height: 35px;
}
#firstsection{
background-image: url(Images/coffee-3289259_1280.jpg);
background-size: cover;
height: 900px;
position: relative;
}
#firstsection div{
margin-top: 0;
position: absolute;
left: 100px;
top: 150px;
color: rgb(47, 119, 27);
text-align: center;
}
#firstsection h1{
margin-bottom: 45px;
}
#firstsection div a{
font-weight: bold;
border: 2px solid rgb(47, 119, 27);
padding: 13px 30px;
font-size: 16.5px;
color: rgb(47, 119, 27);
}
#firstsection div a:hover{
color: rgb(133, 163, 131);
border: 2px solid rgb(133, 163, 131);
}
#textboxes{
display: flex;
margin-top: 50px;
flex-wrap: wrap;
}
#textboxes div{
text-align: center;
margin: 15px 60px;
border: 2px solid rgb(93, 158, 76);
padding: 30px 30px;
width: 27%;
}
#middlesection img:first-of-type{
width: 55px;
}
#middlesection h2{
text-align: center;
width: 100%;
}
#lastsection{
text-align: center;
}
#lastsection img{
width: 30%;
margin: 100px auto 0px;
}
#lastsection div{
position: relative;
bottom: 450px;
}
#lastsection div a:visited{
color: blue;
}
footer{
background-color: rgb(93, 158, 76);
padding: 15px;
color: rgb(214, 245, 210);
font-size: 14px;
display: flex;
justify-content: center;
align-items: center;
}
footer img{
height: 35px;
width: 35px;
margin-right: 15px;
}
footer div{
text-align: center;
}
@media screen and (max-width: 800px){
#textboxes div{
width: 100%;
}
#lastsection img{
width: 85%;
}
}<!DOCTYPE html>
<html>
<head>
<title>Finances | Manage your money easily</title>
<meta charset="UTF-8">
<meta content="width=device-width, initial-scale=1.0" name="viewport">
<meta content="Control you spending and manage your money easily. Your finances by the short hairs." name="description">
<meta content="Bruno M. B. Sdoukos" name="author">
<meta content="finances, managing money, spending control" name="keywords">
<link href="stylesheet.css" rel="stylesheet" type="text/css">
</head>
<body>
<header>
<a href="index.html"><img src="Images/icons8-fund-accounting-80.png"></a> <a href="index.html">
<h1>Finances</h1></a>
<nav>
<ul>
<li>
<a href="index.html">Home</a>
</li>
<li>
<a href="#">About</a>
</li>
<li>
<a href="#">Contact us</a>
</li>
<li>
<a href="#">Register</a>
</li>
<li>
<a href="#">Login</a>
</li>
</ul>
</nav>
</header>
<main>
<section id="firstsection">
<div>
<h1>Manage your money easily, anywhere, anytime.</h1><a href="#">Get started</a>
</div>
</section>
<section id="middlesection">
<div id="textboxes">
<div>
<img src="Images/icons8-increase-64.png">
<h3>Concrete data</h3>
<p>Simple but concrete data that are the answer to all the quesions about your current money, spending and.</p>
</div>
<div>
<img src="Images/icons8-navigation-toolbar-left-filled-50%20(1).png">
<h3>Easy interface</h3>
<p>An interface easy to use, made to you who want to manage your money faster and with no problems.</p>
</div>
<div>
<img src="Images/icons8-natural-user-interface-2-filled-50.png">
<h3>Fast access</h3>
<p>No complications that make you lose time. Just some clicks and done, you are in Finances, with all you need.</p>
</div>
</div>
</section>
<section id="lastsection">
<img src="Images/board-1362851_1280.png">
<div>
<h2>Register now and enjoy<br>
the best of Finances.</h2><a href="#">Create an account</a>
</div>
</section>
</main>
<footer>
<img src="Images/icons8-fund-accounting-80.png">
<div>
<p>A work of Bruno Sdoukos.</p>
</div>
</footer>
</body>
</html>
答案 0 :(得分：1)
实际上它不是隐藏的。标头中的链接恰好具有接近白色的颜色，以至于对比度真的很低。当标题的内容比视口宽时，它们会溢出标题的右侧。
最简单的解决方案是将flex-wrap:wrap赋予header，但我建议改用媒体查询来覆盖display:flex（以实现更好的向后兼容性）。
@charset "UTF-8";
@import url('https://fonts.googleapis.com/css?family=Doppio+One|Open+Sans&display=swap');
html,
body,
*,
*::before,
*::after {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
width: 99.13vw;
}
body {
font-family: 'Open Sans', sans-serif;
margin: 0;
}
h2,
h3 {
margin-top: 10px;
margin-bottom: 10px;
}
a {
text-decoration: none;
transition: 0.2s linear;
}
header {
background-color: rgb(93, 158, 76);
display: flex;
align-items: center;
padding: 10px 30px;
width: 100%;
}
@media all and (max-width:56em) {
header {
display: block;
}
header>a,
header>nav {
display: inline-block;
}
}
header img {
width: 45px;
}
header h1 {
font-family: 'Doppio One', cursive;
margin-left: 10px;
color: rgb(214, 245, 210);
}
nav ul {
display: flex;
list-style: none;
}
nav ul li a {
margin-left: 55px;
}
nav a {
color: rgb(230, 245, 229);
font-size: 17px;
}
nav a:hover {
background-color: rgb(143, 182, 135);
padding: 10px 15px;
margin: 0 -15px 0 40px;
}
nav img {
display: none;
width: 30px;
height: 35px;
}
#firstsection {
background-image: url(Images/coffee-3289259_1280.jpg);
background-size: cover;
height: 900px;
position: relative;
}
#firstsection div {
margin-top: 0;
position: absolute;
left: 100px;
top: 150px;
color: rgb(47, 119, 27);
text-align: center;
}
#firstsection h1 {
margin-bottom: 45px;
}
#firstsection div a {
font-weight: bold;
border: 2px solid rgb(47, 119, 27);
padding: 13px 30px;
font-size: 16.5px;
color: rgb(47, 119, 27);
}
#firstsection div a:hover {
color: rgb(133, 163, 131);
border: 2px solid rgb(133, 163, 131);
}
#textboxes {
display: flex;
margin-top: 50px;
flex-wrap: wrap;
}
#textboxes div {
text-align: center;
margin: 15px 60px;
border: 2px solid rgb(93, 158, 76);
padding: 30px 30px;
width: 27%;
}
#middlesection img:first-of-type {
width: 55px;
}
#middlesection h2 {
text-align: center;
width: 100%;
}
#lastsection {
text-align: center;
}
#lastsection img {
width: 30%;
margin: 100px auto 0px;
}
#lastsection div {
position: relative;
bottom: 450px;
}
#lastsection div a:visited {
color: blue;
}
footer {
background-color: rgb(93, 158, 76);
padding: 15px;
color: rgb(214, 245, 210);
font-size: 14px;
display: flex;
justify-content: center;
align-items: center;
}
footer img {
height: 35px;
width: 35px;
margin-right: 15px;
}
footer div {
text-align: center;
}
@media screen and (max-width: 800px) {
#textboxes div {
width: 100%;
}
#lastsection img {
width: 85%;
}
}<!DOCTYPE html>
<html>
<head>
<title>Finances | Manage your money easily</title>
<meta charset="UTF-8">
<meta content="width=device-width, initial-scale=1.0" name="viewport">
<meta content="Control you spending and manage your money easily. Your finances by the short hairs." name="description">
<meta content="Bruno M. B. Sdoukos" name="author">
<meta content="finances, managing money, spending control" name="keywords">
<link href="stylesheet.css" rel="stylesheet" type="text/css">
</head>
<body>
<header>
<a href="index.html"><img src="Images/icons8-fund-accounting-80.png"></a>
<a href="index.html">
<h1>Finances</h1>
</a>
<nav>
<ul>
<li>
<a href="index.html">Home</a>
</li>
<li>
<a href="#">About</a>
</li>
<li>
<a href="#">Contact us</a>
</li>
<li>
<a href="#">Register</a>
</li>
<li>
<a href="#">Login</a>
</li>
</ul>
</nav>
</header>
<main>
<section id="firstsection">
<div>
<h1>Manage your money easily, anywhere, anytime.</h1><a href="#">Get started</a>
</div>
</section>
<section id="middlesection">
<div id="textboxes">
<div>
<img src="Images/icons8-increase-64.png">
<h3>Concrete data</h3>
<p>Simple but concrete data that are the answer to all the quesions about your current money, spending and.</p>
</div>
<div>
<img src="Images/icons8-navigation-toolbar-left-filled-50%20(1).png">
<h3>Easy interface</h3>
<p>An interface easy to use, made to you who want to manage your money faster and with no problems.</p>
</div>
<div>
<img src="Images/icons8-natural-user-interface-2-filled-50.png">
<h3>Fast access</h3>
<p>No complications that make you lose time. Just some clicks and done, you are in Finances, with all you need.</p>
</div>
</div>
</section>
<section id="lastsection">
<img src="Images/board-1362851_1280.png">
<div>
<h2>Register now and enjoy<br> the best of Finances.</h2><a href="#">Create an account</a>
</div>
</section>
</main>
<footer>
<img src="Images/icons8-fund-accounting-80.png">
<div>
<p>A work of Bruno Sdoukos.</p>
</div>
</footer>
</body>
</html>