我是一名HTML / CSS新手，我正在使用名为Topol.io的免费程序为我即将发送的电子邮件（在EMMA中）创建HTML页脚。
在Topol网站上，在预览模式下，它在桌面和移动设备上都是正确的（桌面上有两排四个按钮，移动设备上有一列堆叠按钮）。
但是，当我向自己发送测试电子邮件时（在Gmail中，桌面上），按钮堆叠而不是两行4.
有人可以指出我的代码有什么问题吗？我知道它与屏幕尺寸代码有关，但我不确定究竟是什么变化。
以下是代码：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office">
<head>
<title></title>
<!--[if !mso]><!-- -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!--<![endif]-->
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style type="text/css">
#outlook a {
padding: 0;
}
.ReadMsgBody {
width: 100%;
}
.ExternalClass {
width: 100%;
}
.ExternalClass * {
line-height: 100%;
}
body {
margin: 0;
padding: 0;
-webkit-text-size-adjust: 100%;
-ms-text-size-adjust: 100%;
}
table,
td {
border-collapse: collapse;
mso-table-lspace: 0pt;
mso-table-rspace: 0pt;
}
img {
border: 0;
height: auto;
line-height: 100%;
outline: none;
text-decoration: none;
-ms-interpolation-mode: bicubic;
}
p {
display: block;
margin: 13px 0;
}
</style>
<!--[if !mso]><!-->
<style type="text/css">
@media only screen and (max-width:480px) {
@-ms-viewport {
width: 320px;
}
@viewport {
width: 320px;
}
}
</style>
<!--<![endif]-->
<!--[if mso]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> <o:PixelsPerInch>96</o:PixelsPerInch> </o:OfficeDocumentSettings></xml><![endif]-->
<!--[if lte mso 11]><style type="text/css"> .outlook-group-fix { width:100% !important; }</style><![endif]-->
<!--[if !mso]><!-->
<link href="https://fonts.googleapis.com/css?family=Ubuntu:300,400,500,700" rel="stylesheet" type="text/css">
<style type="text/css">
@import url(https://fonts.googleapis.com/css?family=Ubuntu:300,400,500,700);
</style>
<!--<![endif]-->
<style type="text/css">
@media only screen and (min-width:480px) {
.mj-column-per-25 {
width: 25% !important;
}
}
</style>
</head>
<body style="background: #FFFFFF;">
<div class="mj-container" style="background-color:#FFFFFF;">
<!--[if mso | IE]> <table role="presentation" border="0" cellpadding="0" cellspacing="0" width="600" align="center" style="width:600px;"> <tr> <td style="line-height:0px;font-size:0px;mso-line-height-rule:exactly;"> <![endif]-->
<table role="presentation" cellpadding="0" cellspacing="0" style="background:#7784C3;font-size:0px;width:100%;" border="0">
<tbody>
<tr>
<td>
<div style="margin:0px auto;max-width:600px;">
<table role="presentation" cellpadding="0" cellspacing="0" style="font-size:0px;width:100%;" align="center" border="0">
<tbody>
<tr>
<td style="text-align:center;vertical-align:top;direction:ltr;font-size:0px;padding:26px 0px 26px 0px;">
<!--[if mso | IE]> <table role="presentation" border="0" cellpadding="0" cellspacing="0"> <tr> <td style="vertical-align:top;width:150px;"> <![endif]-->
<div class="mj-column-per-25 outlook-group-fix" style="vertical-align:top;display:inline-block;direction:ltr;font-size:13px;text-align:left;width:100%;">
<table role="presentation" cellpadding="0" cellspacing="0" width="100%" border="0">
<tbody>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/new-parent-baby/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:16px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">Programs</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/contact-us/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:16px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">Contact</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
<!--[if mso | IE]> </td><td style="vertical-align:top;width:150px;"> <![endif]-->
<div class="mj-column-per-25 outlook-group-fix" style="vertical-align:top;display:inline-block;direction:ltr;font-size:13px;text-align:left;width:100%;">
<table role="presentation" cellpadding="0" cellspacing="0" width="100%" border="0">
<tbody>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/class-calendar/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:16px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">Schedule</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/curriculum/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:16px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">Preschool</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
<!--[if mso | IE]> </td><td style="vertical-align:top;width:150px;"> <![endif]-->
<div class="mj-column-per-25 outlook-group-fix" style="vertical-align:top;display:inline-block;direction:ltr;font-size:13px;text-align:left;width:100%;">
<table role="presentation" cellpadding="0" cellspacing="0" width="100%" border="0">
<tbody>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/class-calendar/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:16px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">Events</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/what-we-do/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:16px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">About Us</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
<!--[if mso | IE]> </td><td style="vertical-align:top;width:150px;"> <![endif]-->
<div class="mj-column-per-25 outlook-group-fix" style="vertical-align:top;display:inline-block;direction:ltr;font-size:13px;text-align:left;width:100%;">
<table role="presentation" cellpadding="0" cellspacing="0" width="100%" border="0">
<tbody>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/birthdays/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:16px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">Parties</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td style="word-wrap:break-word;font-size:0px;padding:11px 0px 11px 0px;padding-top:10px;padding-left:25px;" align="center">
<table role="presentation" cellpadding="0" cellspacing="0" style="border-collapse:separate;" align="center" border="0">
<tbody>
<tr>
<td style="border:none;border-radius:24px;color:#fff;cursor:auto;padding:10px 25px;" align="center" valign="middle" bgcolor="#ff2166"><a href="http://www.bubblesacademy.com/blog/" style="text-decoration:none;background:#ff2166;color:#fff;font-family:Ubuntu, Helvetica, Arial, sans-serif, Helvetica, Arial, sans-serif;font-size:17px;font-weight:normal;line-height:120%;text-transform:none;margin:0px;"
target="_blank">Blog</a></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
<!--[if mso | IE]> </td></tr></table> <![endif]-->
</td>
</tr>
</tbody>
</table>
</div>
</td>
</tr>
</tbody>
</table>
<!--[if mso | IE]> </td></tr></table> <![endif]-->
提前谢谢!!