CSS：保证金仅围绕特定 HTML div？
CSS: margin only around specific HTML div?
我有以下 HTML 文档，在文档中我希望在以下 div:
周围留出空白
<div class="messageBody">
同时保持页眉和页脚的原始宽度。
我该怎么做？
我试过添加
.messageBody{
margin: 10px
}
在 <style> 标签中，但不影响 div?
中的边距
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html data-editor-version="2" class="sg-campaigns" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1">
<!--[if !mso]><!-->
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<!--<![endif]-->
<!--[if (gte mso 9)|(IE)]>
<xml>
<o:OfficeDocumentSettings>
<o:AllowPNG/>
<o:PixelsPerInch>96</o:PixelsPerInch>
</o:OfficeDocumentSettings>
</xml>
<![endif]-->
<style type="text/css">
body {
width: 600px;
margin: 0 auto;
}
table {
border-collapse: collapse;
}
table,
td {
mso-table-lspace: 0pt;
mso-table-rspace: 0pt;
}
img {
-ms-interpolation-mode: bicubic;
}
body,
p,
div {
font-family: arial, helvetica, sans-serif;
font-size: 14px;
}
body {
color: #000000;
}
body a {
color: #1188E6;
text-decoration: none;
}
p {
margin: 0;
padding: 0;
}
table.wrapper {
width: 100% !important;
table-layout: fixed;
-webkit-font-smoothing: antialiased;
-webkit-text-size-adjust: 100%;
-moz-text-size-adjust: 100%;
-ms-text-size-adjust: 100%;
}
img.max-width {
max-width: 100% !important;
}
.column.of-2 {
width: 50%;
}
.column.of-3 {
width: 33.333%;
}
.column.of-4 {
width: 25%;
}
@media screen and (max-width:480px) {
.preheader .rightColumnContent,
.footer .rightColumnContent {
text-align: left !important;
}
.preheader .rightColumnContent div,
.preheader .rightColumnContent span,
.footer .rightColumnContent div,
.footer .rightColumnContent span {
text-align: left !important;
.preheader .rightColumnContent,
.preheader .leftColumnContent {
font-size: 80% !important;
padding: 5px 0;
}
table.wrapper-mobile {
width: 100% !important;
table-layout: fixed;
}
img.max-width {
height: auto !important;
max-width: 100% !important;
}
a.bulletproof-button {
display: block !important;
width: auto !important;
font-size: 80%;
padding-left: 0 !important;
padding-right: 0 !important;
}
.columns {
width: 100% !important;
}
.column {
display: block !important;
width: 100% !important;
padding-left: 0 !important;
padding-right: 0 !important;
margin-left: 0 !important;
margin-right: 0 !important;
}
}
</style>
<table class="wrapper" role="module" data-type="image" border="0" cellpadding="0" cellspacing="0" width="100%" style="table-layout: fixed;" data-muid="b258ba20-9e45-4cef-96e8-396a2f5fbce8">
<tbody>
<tr>
<td style="font-size:6px; line-height:10px; padding:0px 0px 0px 0px;" valign="top" align="center">
<img class="max-width" border="0" style="display:block; color:#000000; text-decoration:none; font-family:Helvetica, arial, sans-serif; font-size:16px; max-width:100% !important; width:100%; height:auto !important;" width="600" alt="" data-proportionally-constrained="true"
data-responsive="true" src="stub src">
</td>
</tr>
</tbody>
</table>
</head>
<body>
<table class="module" role="module" data-type="code" border="0" cellpadding="0" cellspacing="0" width="100%" style="table-layout: fixed;" data-muid="5dd19a7e-9c00-4720-8d1e-272802ca3964">
<tbody>
<tr>
<td style="font-size:6px; line-height:10px; padding:0px 0px 0px 0px;" valign="top" align="center">
<img class="max-width" border="0" style="display:block; color:#000000; text-decoration:none; font-family:Helvetica, arial, sans-serif; font-size:16px; max-width:100% !important; width:100%; height:auto !important;" width="600" alt="" data-proportionally-constrained="true"
data-responsive="true" src="stub src" ">
</td>
</tr>
<div class="messageBody ">
<tr>
<td height="100% " valign="top " role="module-content ">
<div class="introduction ">
<br>
<p class="sansserif ">
<b>Hi,</b>
<br>
<br> Click the link in the table below to see more info .
<br>
<br>
</p>
</div>
<style>
.messageBody{
margin: 38px
}
p.sansserif {
font-family: Arial, Helvetica, sans-serif;
}
#carTable {
color: #333;
font-family: Arial, Helvetica, sans-serif;
width: 100%;
;
border-collapse: collapse;
border-spacing: 0;
}
#carTable td,
th {
border: 1px solid transparent;
/* No more visible border */
height: 30px;
transition: all 0.3s;
/* Simple transition for hover effect */
}
#carTable th {
background: #DFDFDF;
/* Darken header a bit */
font-weight: bold;
text-align: left
}
#carTable td {
background: #FAFAFA;
text-align: left
/* Cells in even rows (2,4,6...) are one color */
#carTable tr:nth-child(even) td {
background: #F1F1F1;
}
/* Cells in odd rows (1,3,5...) are another (excludes header cells) */
#carTable tr:nth-child(odd) td {
background: #FEFEFE;
}
</style>
<div class="table ">
<table id="carTable ">
<tbody>
<tr>
<th>Car Number</th>
<th>Group</th>
</tr>
<!-- -->
<tr>
<td><a href="https://www.testurl.com ">CAR_1</a></td>
<td>Group 1</td>
<!-- -->
</tbody>
</table>
</div>
<div class="errorInformation ">
<br>
<p class="sansserif ">
If you think this was sent mistakenly, please contact support at <a href="mailto:mail@test.com ">mail@test.com</a>
<br>
<br>
</p>
</div>
</td>
</tr>
</div>
</tbody>
</table>
</body>
<footer>
<table class="module " role="module " data-type="text " border="0 " cellpadding="0 " cellspacing="0 " width="100% " style="table-layout: fixed; " data-muid="20f34b16-a07e-4993-8822-da37a70f37cc " data-mc-module-version="2019-10-22 ">
<tbody>
<tr>
<td style="padding:14px 0px 14px 0px; line-height:10px; text-align:inherit; background-color:#135670; " height="100% " valign="top " bgcolor="#135670 " role="module-content ">
<div>
<div style="font-family: inherit; text-align: center "><span style="color: #f6f2f2 ">Get the latest news at </span><a href="https://testurl.com><span style="color: #20ede7">testurl.com</span></a>
</div>
<div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</footer>
</html>
我目前在这个 HTML 文档中有 2 个样式表，我想知道一个是否覆盖了另一个？
简介
样式表可以级联，也可以相互覆盖。
您已经为 messagebody 设置了 margin，因此您应该设置那个。
增加现有保证金而不是增加新保证金。
.messageBody{
margin: 38px
}
此外，您的代码似乎违反了 HTML 惯例。如评论中所述，您应该 运行 您的代码通过 html 验证器。
使用浏览器检查器玩 CSS
看看下面的文章：Get Started With Viewing And Changing CSS
使用检查器，我看到了您当前代码的结果并添加了一个 dotted border 以使其更加可见。
当我把边距改成200px时，效果更明显：
我有以下 HTML 文档，在文档中我希望在以下 div:
周围留出空白<div class="messageBody">
同时保持页眉和页脚的原始宽度。
我该怎么做？
我试过添加
.messageBody{
margin: 10px
}
在 <style> 标签中，但不影响 div?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html data-editor-version="2" class="sg-campaigns" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1">
<!--[if !mso]><!-->
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<!--<![endif]-->
<!--[if (gte mso 9)|(IE)]>
<xml>
<o:OfficeDocumentSettings>
<o:AllowPNG/>
<o:PixelsPerInch>96</o:PixelsPerInch>
</o:OfficeDocumentSettings>
</xml>
<![endif]-->
<style type="text/css">
body {
width: 600px;
margin: 0 auto;
}
table {
border-collapse: collapse;
}
table,
td {
mso-table-lspace: 0pt;
mso-table-rspace: 0pt;
}
img {
-ms-interpolation-mode: bicubic;
}
body,
p,
div {
font-family: arial, helvetica, sans-serif;
font-size: 14px;
}
body {
color: #000000;
}
body a {
color: #1188E6;
text-decoration: none;
}
p {
margin: 0;
padding: 0;
}
table.wrapper {
width: 100% !important;
table-layout: fixed;
-webkit-font-smoothing: antialiased;
-webkit-text-size-adjust: 100%;
-moz-text-size-adjust: 100%;
-ms-text-size-adjust: 100%;
}
img.max-width {
max-width: 100% !important;
}
.column.of-2 {
width: 50%;
}
.column.of-3 {
width: 33.333%;
}
.column.of-4 {
width: 25%;
}
@media screen and (max-width:480px) {
.preheader .rightColumnContent,
.footer .rightColumnContent {
text-align: left !important;
}
.preheader .rightColumnContent div,
.preheader .rightColumnContent span,
.footer .rightColumnContent div,
.footer .rightColumnContent span {
text-align: left !important;
.preheader .rightColumnContent,
.preheader .leftColumnContent {
font-size: 80% !important;
padding: 5px 0;
}
table.wrapper-mobile {
width: 100% !important;
table-layout: fixed;
}
img.max-width {
height: auto !important;
max-width: 100% !important;
}
a.bulletproof-button {
display: block !important;
width: auto !important;
font-size: 80%;
padding-left: 0 !important;
padding-right: 0 !important;
}
.columns {
width: 100% !important;
}
.column {
display: block !important;
width: 100% !important;
padding-left: 0 !important;
padding-right: 0 !important;
margin-left: 0 !important;
margin-right: 0 !important;
}
}
</style>
<table class="wrapper" role="module" data-type="image" border="0" cellpadding="0" cellspacing="0" width="100%" style="table-layout: fixed;" data-muid="b258ba20-9e45-4cef-96e8-396a2f5fbce8">
<tbody>
<tr>
<td style="font-size:6px; line-height:10px; padding:0px 0px 0px 0px;" valign="top" align="center">
<img class="max-width" border="0" style="display:block; color:#000000; text-decoration:none; font-family:Helvetica, arial, sans-serif; font-size:16px; max-width:100% !important; width:100%; height:auto !important;" width="600" alt="" data-proportionally-constrained="true"
data-responsive="true" src="stub src">
</td>
</tr>
</tbody>
</table>
</head>
<body>
<table class="module" role="module" data-type="code" border="0" cellpadding="0" cellspacing="0" width="100%" style="table-layout: fixed;" data-muid="5dd19a7e-9c00-4720-8d1e-272802ca3964">
<tbody>
<tr>
<td style="font-size:6px; line-height:10px; padding:0px 0px 0px 0px;" valign="top" align="center">
<img class="max-width" border="0" style="display:block; color:#000000; text-decoration:none; font-family:Helvetica, arial, sans-serif; font-size:16px; max-width:100% !important; width:100%; height:auto !important;" width="600" alt="" data-proportionally-constrained="true"
data-responsive="true" src="stub src" ">
</td>
</tr>
<div class="messageBody ">
<tr>
<td height="100% " valign="top " role="module-content ">
<div class="introduction ">
<br>
<p class="sansserif ">
<b>Hi,</b>
<br>
<br> Click the link in the table below to see more info .
<br>
<br>
</p>
</div>
<style>
.messageBody{
margin: 38px
}
p.sansserif {
font-family: Arial, Helvetica, sans-serif;
}
#carTable {
color: #333;
font-family: Arial, Helvetica, sans-serif;
width: 100%;
;
border-collapse: collapse;
border-spacing: 0;
}
#carTable td,
th {
border: 1px solid transparent;
/* No more visible border */
height: 30px;
transition: all 0.3s;
/* Simple transition for hover effect */
}
#carTable th {
background: #DFDFDF;
/* Darken header a bit */
font-weight: bold;
text-align: left
}
#carTable td {
background: #FAFAFA;
text-align: left
/* Cells in even rows (2,4,6...) are one color */
#carTable tr:nth-child(even) td {
background: #F1F1F1;
}
/* Cells in odd rows (1,3,5...) are another (excludes header cells) */
#carTable tr:nth-child(odd) td {
background: #FEFEFE;
}
</style>
<div class="table ">
<table id="carTable ">
<tbody>
<tr>
<th>Car Number</th>
<th>Group</th>
</tr>
<!-- -->
<tr>
<td><a href="https://www.testurl.com ">CAR_1</a></td>
<td>Group 1</td>
<!-- -->
</tbody>
</table>
</div>
<div class="errorInformation ">
<br>
<p class="sansserif ">
If you think this was sent mistakenly, please contact support at <a href="mailto:mail@test.com ">mail@test.com</a>
<br>
<br>
</p>
</div>
</td>
</tr>
</div>
</tbody>
</table>
</body>
<footer>
<table class="module " role="module " data-type="text " border="0 " cellpadding="0 " cellspacing="0 " width="100% " style="table-layout: fixed; " data-muid="20f34b16-a07e-4993-8822-da37a70f37cc " data-mc-module-version="2019-10-22 ">
<tbody>
<tr>
<td style="padding:14px 0px 14px 0px; line-height:10px; text-align:inherit; background-color:#135670; " height="100% " valign="top " bgcolor="#135670 " role="module-content ">
<div>
<div style="font-family: inherit; text-align: center "><span style="color: #f6f2f2 ">Get the latest news at </span><a href="https://testurl.com><span style="color: #20ede7">testurl.com</span></a>
</div>
<div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</footer>
</html>
我目前在这个 HTML 文档中有 2 个样式表，我想知道一个是否覆盖了另一个？
简介
样式表可以级联，也可以相互覆盖。
您已经为 messagebody 设置了 margin，因此您应该设置那个。
增加现有保证金而不是增加新保证金。
.messageBody{
margin: 38px
}
此外，您的代码似乎违反了 HTML 惯例。如评论中所述，您应该 运行 您的代码通过 html 验证器。
使用浏览器检查器玩 CSS
看看下面的文章：Get Started With Viewing And Changing CSS
使用检查器，我看到了您当前代码的结果并添加了一个 dotted border 以使其更加可见。
当我把边距改成200px时，效果更明显：