问题是页脚的文本在此页面上左对齐，但在使用相同代码的任何其他页面上则没有。我一步一步地注释掉了每个部分，是 map img 导致了这个问题。我可以通过将页脚设置为 clear right 来解决这个问题，但这似乎完全弄乱了页脚的高度。我提供了一些屏幕截图来帮助证明我的意思。 
#container {
background-image: url(..//Images/backgroundPic.jpg);
background-repeat: no-repeat;
margin-left: auto;
margin-right: auto;
width: 1000px;
border-style: ridge;
border-width: 5px;
}
h1,
h2 {
text-decoration: underline;
}
p {
font-weight: bold;
}
body {
font-family: Arial, Helvetica, sans-serif;
font-size: medium;
background-color: #F1EBEB;
}
/* Header */
#top {
padding: 0px;
margin: 0px;
background-color: white;
background-image: url(../images/tutorteam.png);
height: 50px;
width: 1000px;
font-size: 1em;
}
#top img {
padding-top: 5px;
padding-left: 5px;
padding-bottom: 5px;
padding-right: 5px;
}
#details {
display: table;
padding: 10px;
}
#details p {
display: table-cell;
vertical-align: top;
padding: 3px;
}
div.tablerow {
display: table-row
}
div.tablerow p:first-child {
text-align: right;
}
#logo {
float: right;
margin-left: 4px;
margin-top: 2px;
}
#back {
float: left;
margin-left: 40px;
margin-top: 2px;
}
#main {
padding: 10px;
margin-top: 20px;
margin-left: 20px;
margin-right: 20px;
background-color: white;
}
#tableContainer {
display: table;
margin-left: auto;
margin-right: auto;
border-spacing: 10px;
font-size: 0.25em;
}
#footer {
display: table-row;
}
#tableCell {
display: table-cell;
vertical-align: top;
}
#dubaiMap {
float: right;
position: relative;
right: 20px;
top: -200px;
}
#signUp {
margin-left: 110px;
margin-bottom: 100px;
border: 0px;
padding: 0px;
height: 90px;
}
#submit {
float: right;
position: relative;
bottom: 60px;
left: 420px;
margin-left: 20px;
background-color: #4CAF50;
/* Green */
border: 2px solid black;
color: white;
padding: 15px 32px;
text-align: center;
text-decoration: none;
font-size: 16px;
}
textarea {
float: right;
position: relative;
bottom: 250px;
right: 175px;
border: 3px solid #4CAF50;
font-size: 14px
}<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Sign Up</title>
<link type="text/css" rel="stylesheet" href="login.css">
</head>
<body>
<div id="container">
<section id="top">
<a href="../index.html">
<img id="back" src="../images/back.png" height="40px">
</a>
<img id="logo" src="../images/tutorTeamLogo.png" height="40px">
</section>
<section id="main">
<p>Are you a tutor or customer? please select the relevant option.</p>
<form>
<select name="user">
<option value="Customer">Customer</option>
<option value="Tutor">Tutor</option>
</select>
</form>
<form action="tutorSignUp.php" method="POST">
<p>Please complete to sign up.</p>
<section id="details">
<div class="tablerow">
<p>First name:</p>
<p>
<input type="text" name="firstName" value="">
</p>
</div>
<div class="tablerow">
<p>Last name:</p>
<p>
<input type="text" name="lastName" value="">
</p>
</div>
<div class="tablerow">
<p>Address:</p>
<p>
<input type="text" name="address" value="">
</p>
</div>
<div class="tablerow">
<p>city:</p>
<p>
<input type="text" name="city" value="">
</p>
</div>
<div class="tablerow">
<p>Zip:</p>
<p>
<input type="text" name="zip" value="">
</p>
</div>
<div class="tablerow">
<p>Telephone:</p>
<p>
<input type="tel" name="telephone" value="">
</p>
</div>
</section>
<img src="../Images/dubaiZones.png" id="dubaiMap">
<p>Tutoring level</p>
<select name="level">
<option value="Pre School">Pre School</option>
<option value="Primary School">Primary</option>
<option value="GCSE">GCSE</option>
<option value="A level">A Level</option>
<option value="Undergraduate">Undergraduate</option>
<option value="Post Graduate">Post Graduate</option>
</select>
<p>Subject specialism(s)</p>
<input type="checkbox" name="subject" value="English">English
<br>
<input type="checkbox" name="subject" value="Maths">Maths
<br>
<input type="checkbox" name="subject" value="Physics">Physics
<br>
<input type="checkbox" name="subject" value="Chemistry">Chemistry
<br>
<input type="checkbox" name="subject" value="Biology">Biology
<br>
<input type="checkbox" name="subject" value="History">History
<br>
<input type="checkbox" name="subject" value="Geography">Geography
<br>
<input type="checkbox" name="subject" value="Religious Studies">R.E.
<br>
<input type="checkbox" name="subject" value="French">French
<br>
<input type="checkbox" name="subject" value="German">German
<br>
<input type="checkbox" name="subject" value="Spanish">Spanish
<br>
<input type="checkbox" name="subject" value="Computing">Computing
<br>
<input type="checkbox" name="subject" value="Business">Business
<br>
<input type="checkbox" name="subject" value="Economics">Economics
<br>
<input type="checkbox" name="subject" value="Classics">Classics
<br>
<br>
<textarea id="textArea" name="comments" rows="10" cols="48">Additional Information...</textarea>
<input type="submit" value="Sign Up" id="submit">
</form>
</section>
<footer>
<table id="tableContainer">
<tr id="footer">
<td id="tableCell">Website design and coding provided by Technology in Learning 2016 Copyright Technology in Learning
<img id="til" src="../Images/company.png" height="12" width="12">
</td>
</tr>
</table>
</footer>
</div>
</body>
</html>最佳答案
我不理解使用表格来显示单行文本的必要性。
您只需要使用带有 text-align: center;
.text-center {
text-align: center;
}<footer id="footer">
<p class="text-center">Website design and coding provided by Technology in Learning 2016 Copyright Technology in Learning
<img id="til" src="../Images/company.png" height="12" width="12">
</p>
</footer>另外，我认为您的问题是由于表格的使用造成的。我相信默认情况下表格单元格在左侧对齐文本，并且我没有看到任何 CSS 规则可以在您的代码中更改它。
关于html - CSS 页脚定位，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41628569/