为什么我的<nav>按钮会向左对齐？
我尝试对text-align:center，nav，ul使用li，但是它们没有使按钮在视口中居中的作用。我也尝试过nav {text-align: left;}。不起作用。
CSS代码：
#container {
width: 100%;
background-color: black;
margin-left: auto;
margin-right: auto;}
main {
background-color: rgb(225, 234, 234);
display: block;
border-radius: 2em;
border-top: medium solid powderblue;
border-bottom: medium solid powderblue;
margin-left: 0.8em;
margin-right: 0.8em;
padding-top: 1em;
padding-right: 0.5em;
padding-bottom: 1em;
padding-left: 0.5em;}
.equip {
width: 100%;
margin-left: auto;
margin-right: auto;}
h1 {
color: powderblue;
text-align: center;
font-size: 1.7em;
font-family: cursive,fantasy,"Times New Roman";
font-style: italic;
white-space: nowrap;}
nav ul {
list-style-type: none;
border-radius: 2em;}
nav ul li {
text-align: center;
padding-bottom: 0.3em;
padding-top: 0.3em;
border-color: powderblue;
background-color: grey;
margin-bottom: 0.5em;
margin-top: 0.5em;
border-radius: 3em;}
nav a {
color: white;
font-family: "Times New Roman";
font-size: 1.3em;
white-space: nowrap;
text-decoration: none;}
footer {
margin-top: 1em;
padding-bottom: 1em;
text-align: center;
font-size: 0.8em;
color: white;}
- HTML代码：
<!DOCTYPE html>
<html lang="en-us">
<head>
<title>FFC|Home</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf-8">
<link rel="stylesheet" href="stylesheet.css">
</head>
<body>
<div id="container">
<header>
<img class="equip" src="D:\ghanesh\ghanesh\Y Combinator\Intern Summer 2019\interning Prep Course\HTML Learn\Step-by-Step Guide\Forward Fitness Club\images\fitness club logo_grey_background.jpg"
alt="Forward Fitness Club ">
<h1>
Forward Fitness Club
</h1>
</header>
<nav>
<ul>
<li> <a href="About Us.html"> About Us </a> </li>
<li> <a href="Classes.html"> Classes </a></li>
<li> <a href="About Us.html"> About Us </a></li>
<li> <a href="Nutrition.html"> Nutrition </a></li>
<li> <a href="Contact Us.html"> Contact Us </a></li>
</ul>
</nav>
<main>
<p>Welcome to Forward Fitness Club. Our mission is to help our clients meet their fitness <b>AND</b> nutrition goals. <br> </p> <!--<span style="font-weight: bold"> </span>-->
<h2> FREE ONE-WEEK TRIAL MEMBERSHIP</h2>
<a href="Contact Us.html">Call Us today to Get Started</a> <br>
<h3>Fitness Club Hours</h3>
<p>
<ul style="list-style-type:none">
<li style="text-align:left"> Monday-Thursday: 6:00am - 6:00pm</li>
<li> Friday: 6:00am - 4:00pm</li>
<li> Saturday: 8:00am - 6:00pm</li>
<li> Sunday: Closed</li>
</ul>
</p>
</main>
<footer >
<address>
Copyright 2015. All Rights Reserved.<br>
<a style="color:powderblue" href="ghanesh.t@gmail.com">forwardfitnessclub@gmail.com</a>
</address>
</footer>
</div>
</body>
</html>
图片1：Samsung Galaxy Note 2视口
图片2：桌面浏览器视口
3 个答案:
答案 0 :(得分：3)
ul列表的左侧有一些默认填充。尝试为text-align: center设置padding-left: 0 和 nav ul：
#container {
width: 100%;
background-color: black;
margin-left: auto;
margin-right: auto;
}
main {
background-color: rgb(225, 234, 234);
display: block;
border-radius: 2em;
border-top: medium solid powderblue;
border-bottom: medium solid powderblue;
margin-left: 0.8em;
margin-right: 0.8em;
padding-top: 1em;
padding-right: 0.5em;
padding-bottom: 1em;
padding-left: 0.5em;
}
.equip {
width: 100%;
margin-left: auto;
margin-right: auto;
}
h1 {
color: powderblue;
text-align: center;
font-size: 1.7em;
font-family: cursive, fantasy, "Times New Roman";
font-style: italic;
white-space: nowrap;
}
nav ul {
text-align: center;
padding-left: 0;
list-style-type: none;
border-radius: 2em;
}
nav ul li {
text-align: center;
padding-bottom: 0.3em;
padding-top: 0.3em;
border-color: powderblue;
background-color: grey;
margin-bottom: 0.5em;
margin-top: 0.5em;
border-radius: 3em;
}
nav a {
color: white;
font-family: "Times New Roman";
font-size: 1.3em;
white-space: nowrap;
text-decoration: none;
}
footer {
margin-top: 1em;
padding-bottom: 1em;
text-align: center;
font-size: 0.8em;
color: white;
}<!DOCTYPE html>
<html lang="en-us">
<head>
<title>FFC|Home</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf-8">
<link rel="stylesheet" href="stylesheet.css">
</head>
<body>
<div id="container">
<header>
<img class="equip" src="D:\ghanesh\ghanesh\Y Combinator\Intern Summer 2019\interning Prep Course\HTML Learn\Step-by-Step Guide\Forward Fitness Club\images\fitness club logo_grey_background.jpg" alt="Forward Fitness Club ">
<h1>
Forward Fitness Club
</h1>
</header>
<nav>
<ul>
<li> <a href="About Us.html"> About Us </a> </li>
<li> <a href="Classes.html"> Classes </a></li>
<li> <a href="About Us.html"> About Us </a></li>
<li> <a href="Nutrition.html"> Nutrition </a></li>
<li> <a href="Contact Us.html"> Contact Us </a></li>
</ul>
</nav>
<main>
<p>Welcome to Forward Fitness Club. Our mission is to help our clients meet their fitness <b>AND</b> nutrition goals. <br> </p>
<!--<span style="font-weight: bold"> </span>-->
<h2> FREE ONE-WEEK TRIAL MEMBERSHIP</h2>
<a href="Contact Us.html">Call Us today to Get Started</a> <br>
<h3>Fitness Club Hours</h3>
<p>
<ul style="list-style-type:none">
<li style="text-align:left"> Monday-Thursday: 6:00am - 6:00pm</li>
<li> Friday: 6:00am - 4:00pm</li>
<li> Saturday: 8:00am - 6:00pm</li>
<li> Sunday: Closed</li>
</ul>
</p>
</main>
<footer>
<address>
Copyright 2015. All Rights Reserved.<br>
<a style="color:powderblue" href="ghanesh.t@gmail.com">forwardfitnessclub@gmail.com</a>
</address>
</footer>
</div>
</body>
</html>
答案 1 :(得分：1)
如果您将其设置为nav { text-align: center;}
#container {
width: 100%;
background-color: black;
margin-left: auto;
margin-right: auto;}
main {
background-color: rgb(225, 234, 234);
display: block;
border-radius: 2em;
border-top: medium solid powderblue;
border-bottom: medium solid powderblue;
margin-left: 0.8em;
margin-right: 0.8em;
padding-top: 1em;
padding-right: 0.5em;
padding-bottom: 1em;
padding-left: 0.5em;}
.equip {
width: 100%;
margin-left: auto;
margin-right: auto;}
h1 {
color: powderblue;
text-align: center;
font-size: 1.7em;
font-family: cursive,fantasy,"Times New Roman";
font-style: italic;
white-space: nowrap;}
nav ul {
list-style-type: none;
border-radius: 2em;}
nav { text-align: center;}
main{ text-align: center;}
address{ text-align: center;}<!DOCTYPE html>
<html lang="en-us">
<head>
<title>FFC|Home</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf-8">
<link rel="stylesheet" href="stylesheet.css">
</head>
<body>
<div id="container">
<header>
<img class="equip" src="D:\ghanesh\ghanesh\Y Combinator\Intern Summer 2019\interning Prep Course\HTML Learn\Step-by-Step Guide\Forward Fitness Club\images\fitness club logo_grey_background.jpg"
alt="Forward Fitness Club ">
<h1>
Forward Fitness Club
</h1>
</header>
<nav>
<ul>
<li> <a href="About Us.html"> About Us </a> </li>
<li> <a href="Classes.html"> Classes </a></li>
<li> <a href="About Us.html"> About Us </a></li>
<li> <a href="Nutrition.html"> Nutrition </a></li>
<li> <a href="Contact Us.html"> Contact Us </a></li>
</ul>
</nav>
<main>
<p>Welcome to Forward Fitness Club. Our mission is to help our clients meet their fitness <b>AND</b> nutrition goals. <br> </p> <!--<span style="font-weight: bold"> </span>-->
<h2> FREE ONE-WEEK TRIAL MEMBERSHIP</h2>
<a href="Contact Us.html">Call Us today to Get Started</a> <br>
<h3>Fitness Club Hours</h3>
<p>
<ul style="list-style-type:none">
<li style="text-align:center"> Monday-Thursday: 6:00am - 6:00pm</li>
<li> Friday: 6:00am - 4:00pm</li>
<li> Saturday: 8:00am - 6:00pm</li>
<li> Sunday: Closed</li>
</ul>
</p>
</main>
<footer >
<address>
Copyright 2015. All Rights Reserved.<br>
<a style="color:powderblue" href="ghanesh.t@gmail.com">forwardfitnessclub@gmail.com</a>
</address>
</footer>
</div>
</body>
</html>
答案 2 :(得分：1)
有时，浏览器会应用默认的用户样式表，如果您错过了课堂上要提及的常见样式。
我给出的示例
所以我的解决方案是，尝试在代码中添加填充
padding: 0px
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