我正在学习 HTML 和 CSS。我的<h3>文本不会对齐到页面的中心。我知道这与背景宽度为 50% 有关，但我需要这样才能使页面有两种颜色。有什么办法解决这个问题吗？
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Required meta tags always come first -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/css/bootstrap.min.css" integrity="sha384-AysaV+vQoT3kOAXZkl02PThvDr8HYKPZhNT5h/CXfBThSRXQ6jW5DO2ekP5ViFdi" crossorigin="anonymous">
<link rel="stylesheet" href="css/style.css">
<link href="https://fonts.googleapis.com/css?family=Oswald:300,400" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Prociono" rel="stylesheet">
<link rel="stylesheet" href="font-awesome/css/font-awesome.css">
</head>
<body>
<!-- HEADER -->
<section id="header">
<h1 class="name">Jessica Shae</h1>
<div class="container heading">
<div class="row">
<div class="col-md-4">
<img src="img/7.jpg" class="display">
</div>
<div class="col-md-4">
<img src="img/2.jpg" class="display">
</div>
<div class="col-md-4">
<img src="img/9.jpg" class="display">
</div>
<div class="row">
<div class="col-md-12 text-xs-center">
<a href="#gallery"<i class="fa fa-chevron-down fa-3x" aria-hidden="true"></i></a>
</div>
</div>
</section>
<!-- Gallery -->
<section id="gallery">
<h2 class="title">The Dark Room</h2>
<div class="container photo-collection">
<div class="row">
<div class="col-md-4 affect">
<img src="img/1.jpg" class="work">
</div>
<div class="col-md-4 affect">
<img src="img/10.jpg" class="work">
</div>
<div class="col-md-4 affect">
<img src="img/4.jpg" class="work">
</div>
</div>
<div class="row">
<div class="col-md-4 affect">
<img src="img/18.jpg" class="work">
</div>
<div class="col-md-4 affect">
<img src="img/6.jpg" class="work">
</div>
<div class="col-md-4 affect">
<img src="img/8.jpg" class="work">
</div>
</div>
<div class="row">
<div class="col-md-4 affect">
<img src="img/12.jpg" class="work">
</div>
<div class="col-md-4 affect">
<img src="img/11.jpg" class="work">
</div>
<div class="col-md-4 affect">
<img src="img/14.jpg" class="work">
</div>
</div>
</div>
</section>
<section class="contact-me">
<div class="contact">
<h3>Contact Me</h3>
</div>
</section>
还有我的 CSS:
* {
/*background-color: rgb(0, 0, 0);*/
background: #070606;
}
/* HEADER */
.display {
height: auto;
width: 500px;
box-sizing: border-box;
overflow: hidden;
overflow-x: hidden;
max-width: 100%;
border: 4px solid white;
border-radius: 6%;
}
.heading {
max-width: 100%;
}
.name {
font-family: 'Oswald', sans-serif;
text-transform: uppercase;
font-size: 500%;
font-weight: 100;
text-align: center;
color: whitesmoke;
width: 100%;
margin-bottom: 20px;
margin-top: 15px;
}
h1:after {
display: block;
height: 2px;
background-color: #e62222; /*Great way to give single line color */
content: " ";
width: 100px;
margin: 0 auto;
margin-top: 20px;
}
.fa {
margin-top: 18px;
}
.fa:link, /*Prevents color change when clicked */
.fa:visited {
text-decoration: none;
color: #bdc3c7;
}
.fa:hover,
.fa:active {
color: #ebedee;
}
/* GALLERY */
.work {
width: 300px;
height: 100%;
margin-top: 60px;
margin-bottom: 60px;
border: 3px solid white;
}
.title {
font-family: 'Prociono', serif;
font-size: 350%;
color: whitesmoke;
text-align: center;
padding-top:40px;
}
.affect img {
opacity: 0.2;
background-color: #070606;
transition: opacity .35s, transform .35s;
transform: scale(1.0);
}
.affect:hover img {
opacity: 1;
transform: scale(1.15);
}
/* CONTACT */
.contact {
background: linear-gradient(to right, black 50%, gray 50%);
}
h3 {
color: white;
text-align: center;
}
最佳答案
CSS 中的这条规则是将每个元素的背景颜色设置为 #070606，因为您使用的是星号，它是一个可以捕获所有内容的通配符选择器。
* { 背景:#070606； }
如果您只想将页面的背景颜色设置为该颜色，请使用 body 而不是 *。
关于css - 为什么文本不会在 <section> 背景中居中对齐？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40410938/