问题：mediawiki 100％的时间没有正确显示我的表格代码。看起来它似乎错误地“继承”了“父”表中的某些颜色，而这些颜色是放在里面的。我希望我可以简单地将CSS编码转移一下以使其正常工作，但到目前为止我没有运气。
第三，我将提供屏幕截图中显示的页面的wiki语法。
h1 {font-variant:small-caps; font-size:200%; font-weight:bold; white-space:nowrap;}
h2 {font-variant:small-caps; font-size:175%; font-weight:bold; white-space:nowrap;}
h3 {font-size:150%; font-weight:bold; white-space:nowrap;}
h4 {font-size:125%; font-weight:bold; white-space:nowrap;}
h5 {font-size:112%; font-weight:bold; white-space:nowrap;}
h6 {font-size:100%; font-weight:bold; white-space:nowrap;}
#bodyContent h1, #bodyContent h2 {margin-bottom: 0.1em;}
table.Default {background:white; color:white; border:1px solid gray;}
table.Default th {background:gray;}
table.Default td {color:black; border:1px solid lightgray;}
table.Default ul {list-style-image:none; list-style-type:square;}
table.Default a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.Default a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.Default a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.Default a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.Default2 {background:white; color:white; border:1px solid gray;}
table.Default2 th {background:gray;}
table.Default2 td {color:black; border:1px solid lightgray; padding:5px;}
table.Default2 ul {list-style-image:none; list-style-type:square;}
table.Default2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.Default2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.Default2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.Default2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.ProductsAndServices {background:rgb(100,0,0); color:white; border:1px solid rgb(50,0,0);}
table.ProductsAndServices th {background:rgb(50,0,0);}
table.ProductsAndServices td {border:1px solid rgb(50,0,0);}
table.ProductsAndServices ul {list-style-image:none; list-style-type:square;}
table.ProductsAndServices a:link {color:rgb(255,100,100); text-decoration:none;}
table.ProductsAndServices a:visited {color:rgb(255,100,100); text-decoration:none;}
table.ProductsAndServices a:hover {color:rgb(255,200,200); text-decoration:none;}
table.ProductsAndServices a:active {color:rgb(255,100,100); text-decoration:none;}
table.ProductsAndServices th a:link {color:white; text-decoration:none;}
table.ProductsAndServices th a:visited {color:white; text-decoration:none;}
table.ProductsAndServices th a:hover {color:rgb(255,200,200); text-decoration:none;}
table.ProductsAndServices th a:active {color:white; text-decoration:none;}
table.ProductsAndServices2 {background:rgb(200,0,0); color:white; border:1px solid rgb(50,0,0); border-spacing:1px;}
table.ProductsAndServices2 th {background:rgb(175,0,0); white-space:nowrap;}
table.ProductsAndServices2 td {background:rgb(255,245,245); color:black; border:1px solid rgb(50,0,0); padding:5px;}
table.ProductsAndServices2 ul {color:black; list-style-image:none; list-style-type:square;}
table.ProductsAndServices2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.ProductsAndServices2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.ProductsAndServices2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.ProductsAndServices2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.ProductsAndServices2 th a:link {color:white; text-decoration:none;}
table.ProductsAndServices2 th a:visited {color:white; text-decoration:none;}
table.ProductsAndServices2 th a:hover {color:rgb(255,200,200); text-decoration:none;}
table.ProductsAndServices2 th a:active {color:white; text-decoration:none;}
table.Tools {background:rgb(225,125,0); color:white; border:1px solid rgb(200,100,0);}
table.Tools th {background:rgb(200,100,0);}
table.Tools td {border:1px solid rgb(200,100,0);}
table.Tools ul {list-style-image:none; list-style-type:square;}
table.Tools a:link {color:rgb(255,200,150); text-decoration:none;}
table.Tools a:visited {color:rgb(255,200,150); text-decoration:none;}
table.Tools a:hover {color:rgb(255,225,200); text-decoration:none;}
table.Tools a:active {color:rgb(255,200,150); text-decoration:none;}
table.Tools th a:link {color:white; text-decoration:none;}
table.Tools th a:visited {color:white; text-decoration:none;}
table.Tools th a:hover {color:rgb(255,225,200); text-decoration:none;}
table.Tools th a:active {color:white; text-decoration:none;}
table.Tools2 {background:rgb(255,175,0); color:white; border:1px solid rgb(200,100,0); border-spacing:1px;}
table.Tools2 th {background:rgb(225,150,0); white-space:nowrap;}
table.Tools2 td {background:rgb(255,245,225); color:black; border:1px solid rgb(200,100,0); padding:5px;}
table.Tools2 ul {color:black; list-style-image:none; list-style-type:square;}
table.Tools2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.Tools2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.Tools2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.Tools2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.Tools2 th a:link {color:white; text-decoration:none;}
table.Tools2 th a:visited {color:white; text-decoration:none;}
table.Tools2 th a:hover {color:rgb(255,225,200); text-decoration:none;}
table.Tools2 th a:active {color:white; text-decoration:none;}
table.Email {background:rgb(175,175,0); color:white; border:1px solid rgb(150,150,0);}
table.Email th {background:rgb(150,150,0);}
table.Email td {border:1px solid rgb(150,150,0);}
table.Email ul {list-style-image:none; list-style-type:square;}
table.Email a:link {color:rgb(255,255,100); text-decoration:none;}
table.Email a:visited {color:rgb(255,255,100); text-decoration:none;}
table.Email a:hover {color:rgb(255,255,200); text-decoration:none;}
table.Email a:active {color:rgb(255,255,100); text-decoration:none;}
table.Email th a:link {color:white; text-decoration:none;}
table.Email th a:visited {color:white; text-decoration:none;}
table.Email th a:hover {color:rgb(255,255,200); text-decoration:none;}
table.Email th a:active {color:white; text-decoration:none;}
table.Email2 {background:rgb(225,255,0); color:white; border:1px solid rgb(150,150,0); border-spacing:1px;}
table.Email2 th {background:rgb(200,200,0); white-space:nowrap;}
table.Email2 td {background:rgb(255,255,225); color:black; border:1px solid rgb(150,150,0); padding:5px;}
table.Email2 ul {color:black; list-style-image:none; list-style-type:square;}
table.Email2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.Email2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.Email2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.Email2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.Email2 th a:link {color:white; text-decoration:none;}
table.Email2 th a:visited {color:white; text-decoration:none;}
table.Email2 th a:hover {color:rgb(255,255,200); text-decoration:none;}
table.Email2 th a:active {color:white; text-decoration:none;}
table.DomainNameSystem {background:rgb(0,100,0); color:white; border:1px solid rgb(0,50,0);}
table.DomainNameSystem th {background:rgb(0,50,0);}
table.DomainNameSystem td {border:1px solid rgb(0,50,0);}
table.DomainNameSystem ul {list-style-image:none; list-style-type:square;}
table.DomainNameSystem a:link {color:rgb(100,255,100); text-decoration:none;}
table.DomainNameSystem a:visited {color:rgb(100,255,100); text-decoration:none;}
table.DomainNameSystem a:hover {color:rgb(200,255,200); text-decoration:none;}
table.DomainNameSystem a:active {color:rgb(100,255,100); text-decoration:none;}
table.DomainNameSystem th a:link {color:white; text-decoration:none;}
table.DomainNameSystem th a:visited {color:white; text-decoration:none;}
table.DomainNameSystem th a:hover {color:rgb(200,255,200); text-decoration:none;}
table.DomainNameSystem th a:active {color:white; text-decoration:none;}
table.DomainNameSystem2 {background:rgb(0,200,0); color:white; border:1px solid rgb(0,50,0); border-spacing:1px;}
table.DomainNameSystem2 th {background:rgb(0,150,0); white-space:nowrap;}
table.DomainNameSystem2 td {background:rgb(235,255,235); color:black; border:1px solid rgb(0,50,0); padding:5px;}
table.DomainNameSystem2 ul {color:black; list-style-image:none; list-style-type:square;}
table.DomainNameSystem2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.DomainNameSystem2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.DomainNameSystem2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.DomainNameSystem2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.DomainNameSystem2 th a:link {color:white; text-decoration:none;}
table.DomainNameSystem2 th a:visited {color:white; text-decoration:none;}
table.DomainNameSystem2 th a:hover {color:rgb(200,255,200); text-decoration:none;}
table.DomainNameSystem2 th a:active {color:white; text-decoration:none;}
table.Policies {background:rgb(0,0,150); color:white; border:1px solid rgb(0,0,100);}
table.Policies th {background:rgb(0,0,50);}
table.Policies td {border:1px solid rgb(0,0,100);}
table.Policies ul {list-style-image:none; list-style-type:square;}
table.Policies a:link {color:rgb(100,100,255); text-decoration:none;}
table.Policies a:visited {color:rgb(100,100,255); text-decoration:none;}
table.Policies a:hover {color:rgb(200,200,255); text-decoration:none;}
table.Policies a:active {color:rgb(100,100,255); text-decoration:none;}
table.Policies th a:link {color:white; text-decoration:none;}
table.Policies th a:visited {color:white; text-decoration:none;}
table.Policies th a:hover {color:rgb(200,200,255); text-decoration:none;}
table.Policies th a:active {color:white; text-decoration:none;}
table.Policies2 {background:rgb(0,0,255); color:white; border:1px solid rgb(0,0,100); border-spacing:1px;}
table.Policies2 th {background:rgb(0,0,200); white-space:nowrap;}
table.Policies2 td {background:rgb(235,235,255); color:black; border:1px solid rgb(0,0,100); padding:5px;}
table.Policies2 ul {color:black; list-style-image:none; list-style-type:square;}
table.Policies2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.Policies2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.Policies2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.Policies2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.Policies2 th a:link {color:white; text-decoration:none;}
table.Policies2 th a:visited {color:white; text-decoration:none;}
table.Policies2 th a:hover {color:rgb(200,200,255); text-decoration:none;}
table.Policies2 th a:active {color:white; text-decoration:none;}
table.Training {background:rgb(100,0,100); color:white; border:1px solid rgb(50,0,50);}
table.Training th {background:rgb(50,0,50);}
table.Training td {border:1px solid rgb(50,0,50);}
table.Training ul {list-style-image:none; list-style-type:square;}
table.Training a:link {color:rgb(255,100,255); text-decoration:none;}
table.Training a:visited {color:rgb(255,100,255); text-decoration:none;}
table.Training a:hover {color:rgb(255,200,255); text-decoration:none;}
table.Training a:active {color:rgb(255,100,255); text-decoration:none;}
table.Training th a:link {color:white; text-decoration:none;}
table.Training th a:visited {color:white; text-decoration:none;}
table.Training th a:hover {color:rgb(255,200,255); text-decoration:none;}
table.Training th a:active {color:white; text-decoration:none;}
table.Training2 {background:rgb(175,0,175); color:white; border:1px solid rgb(50,0,50); border-spacing:1px;}
table.Training2 th {background:rgb(125,0,125); white-space:nowrap;}
table.Training2 td {background:rgb(255,235,255); color:black; border:1px solid rgb(50,0,50); padding:5px;}
table.Training2 ul {color:black; list-style-image:none; list-style-type:square;}
table.Training2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.Training2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.Training2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.Training2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.Training2 th a:link {color:white; text-decoration:none;}
table.Training2 th a:visited {color:white; text-decoration:none;}
table.Training2 th a:hover {color:rgb(255,200,255); text-decoration:none;}
table.Training2 th a:active {color:white; text-decoration:none;}
table.WebsiteBuilders {background:rgb(75,50,0); color:white; border:1px solid rgb(25,0,0);}
table.WebsiteBuilders th {background:rgb(25,0,0);}
table.WebsiteBuilders td {border:1px solid rgb(50,25,0);}
table.WebsiteBuilders ul {list-style-image:none; list-style-type:square;}
table.WebsiteBuilders a:link {color:rgb(250,225,100); text-decoration:none;}
table.WebsiteBuilders a:visited {color:rgb(250,225,100); text-decoration:none;}
table.WebsiteBuilders a:hover {color:rgb(255,250,200); text-decoration:none;}
table.WebsiteBuilders a:active {color:rgb(250,225,100); text-decoration:none;}
table.WebsiteBuilders th a:link {color:white; text-decoration:none;}
table.WebsiteBuilders th a:visited {color:white; text-decoration:none;}
table.WebsiteBuilders th a:hover {color:rgb(255,250,200); text-decoration:none;}
table.WebsiteBuilders th a:active {color:white; text-decoration:none;}
table.WebsiteBuilders2 {background:rgb(175,125,0); color:white; border:1px solid rgb(25,0,0); border-spacing:1px;}
table.WebsiteBuilders2 th {background:rgb(125,75,0); white-space:nowrap;}
table.WebsiteBuilders2 td {background:rgb(255,240,225); color:black; border:1px solid rgb(25,0,0); padding:5px;}
table.WebsiteBuilders2 ul {color:black; list-style-image:none; list-style-type:square;}
table.WebsiteBuilders2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.WebsiteBuilders2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.WebsiteBuilders2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.WebsiteBuilders2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.WebsiteBuilders2 th a:link {color:white; text-decoration:none;}
table.WebsiteBuilders2 th a:visited {color:white; text-decoration:none;}
table.WebsiteBuilders2 th a:hover {color:rgb(255,250,200); text-decoration:none;}
table.WebsiteBuilders2 th a:active {color:white; text-decoration:none;}
table.Troubleshooting {background:rgb(50,50,50); color:white; border:1px solid rgb(0,0,0);}
table.Troubleshooting th {background:rgb(0,0,0);}
table.Troubleshooting td {border:1px solid rgb(0,0,0);}
table.Troubleshooting ul {list-style-image:none; list-style-type:square;}
table.Troubleshooting a:link {color:rgb(175,175,175); text-decoration:none;}
table.Troubleshooting a:visited {color:rgb(175,175,175); text-decoration:none;}
table.Troubleshooting a:hover {color:rgb(255,255,255); text-decoration:none;}
table.Troubleshooting a:active {color:rgb(175,175,175); text-decoration:none;}
table.Troubleshooting th a:link {color:white; text-decoration:none;}
table.Troubleshooting th a:visited {color:white; text-decoration:none;}
table.Troubleshooting th a:hover {color:rgb(225,225,225); text-decoration:none;}
table.Troubleshooting th a:active {color:white; text-decoration:none;}
table.Troubleshooting2 {background:rgb(150,150,150); color:white; border:1px solid rgb(0,0,0); border-spacing:1px;}
table.Troubleshooting2 th {background:rgb(100,100,100); white-space:nowrap;}
table.Troubleshooting2 td {background:rgb(245,245,245); color:black; border:1px solid rgb(0,0,0); padding:5px;}
table.Troubleshooting2 ul {color:black; list-style-image:none; list-style-type:square;}
table.Troubleshooting2 a:link {color:rgb(51, 102, 102); text-decoration:none;}
table.Troubleshooting2 a:visited {color:rgb(51, 102, 102); text-decoration:none;}
table.Troubleshooting2 a:hover {color:rgb(153, 204, 204); text-decoration:none;}
table.Troubleshooting2 a:active {color:rgb(51, 102, 102); text-decoration:none;}
table.Troubleshooting2 th a:link {color:white; text-decoration:none;}
table.Troubleshooting2 th a:visited {color:white; text-decoration:none;}
table.Troubleshooting2 th a:hover {color:rgb(225,225,225); text-decoration:none;}
table.Troubleshooting2 th a:active {color:white; text-decoration:none;}
the screenshot http://testrfrost.ipage.com/stackoverflow/mediawiki_css_table_class_bug.JPG
{|width="100%"
|
{|class="Default2" width="100%"
!Default2 Header
|-
|Default2 Body
|-
|
{|class="ProductsAndServices2" width="100%"
!ProductsAndServices2 Header
|-
|ProductsAndServices2 Body
|-
|
{|class="Tools2" width="100%"
!Tools2 Header
|-
|Tools2 Body
|-
|
{|class="Email2" width="100%"
!Email2 Header
|-
|Email2 Body
|-
|
{|class="DomainNameSystem2" width="100%"
!DomainNameSystem2 Header
|-
|DomainNameSystem2 Body
|-
|
{|class="Policies2" width="100%"
!Policies2 Header
|-
|Policies2 Body
|-
|
{|class="Training2" width="100%"
!Training2 Header
|-
|Training2 Body
|-
|
{|class="WebsiteBuilders2" width="100%"
!WebsiteBuilders2 Header
|-
|WebsiteBuilders2 Body
|-
|
{|class="Troubleshooting2" width="100%"
!Troubleshooting2 Header
|-
|Troubleshooting2 Body
|}
|}
|}
|}
|}
|}
|}
|}
|}
|
{|class="Troubleshooting2" width="100%"
!Troubleshooting2 Header
|-
|Troubleshooting2 body
|-
|
{|class="WebsiteBuilders2" width="100%"
!WebsiteBuilders2 Header
|-
|WebsiteBuilders2 body
|-
|
{|class="Training2" width="100%"
!Training2 Header
|-
|Training2 body
|-
|
{|class="Policies2" width="100%"
!Policies2 Header
|-
|Policies2 body
|-
|
{|class="DomainNameSystem2" width="100%"
!DomainNameSystem2 Header
|-
|DomainNameSystem2 body
|-
|
{|class="Email2" width="100%"
!Email2 Header
|-
|Email2 body
|-
|
{|class="Tools2" width="100%"
!Tools2 Header
|-
|Tools2 body
|-
|
{|class="ProductsAndServices2" width="100%"
!ProductsAndServices2 Header
|-
|ProductsAndServices2 body
|-
|
{|class="Default2" width="100%"
!Default2 Header
|-
|Default2 body
|}
|}
|}
|}
|}
|}
|}
|}
|}
|-
|
{|class="Default" width="100%"
!Default Header
|-
|Default body
|-
|
{|class="ProductsAndServices" width="100%"
!ProductsAndServices Header
|-
|ProductsAndServices body
|-
|
{|class="Tools" width="100%"
!Tools Header
|-
|Tools body
|-
|
{|class="Email" width="100%"
!Email Header
|-
|Email body
|-
|
{|class="DomainNameSystem" width="100%"
!DomainNameSystem Header
|-
|DomainNameSystem body
|-
|
{|class="Policies" width="100%"
!Policies Header
|-
|Policies body
|-
|
{|class="Training" width="100%"
!Training Header
|-
|Training body
|-
|
{|class="WebsiteBuilders" width="100%"
!WebsiteBuilders Header
|-
|WebsiteBuilders body
|-
|
{|class="Troubleshooting" width="100%"
!Troubleshooting Header
|-
|Troubleshooting body
|}
|}
|}
|}
|}
|}
|}
|}
|}
|
{|class="Troubleshooting" width="100%"
!Troubleshooting Header
|-
|Troubleshooting body
|-
|
{|class="WebsiteBuilders" width="100%"
!WebsiteBuilders Header
|-
|WebsiteBuilders body
|-
|
{|class="Training" width="100%"
!Training Header
|-
|Training body
|-
|
{|class="Policies" width="100%"
!Policies Header
|-
|Policies body
|-
|
{|class="DomainNameSystem" width="100%"
!DomainNameSystem Header
|-
|DomainNameSystem body
|-
|
{|class="Email" width="100%"
!Email Header
|-
|Email body
|-
|
{|class="Tools" width="100%"
!Tools Header
|-
|Tools body
|-
|
{|class="ProductsAndServices" width="100%"
!ProductsAndServices Header
|-
|ProductsAndServices body
|-
|
{|class="Default" width="100%"
!Default Header
|-
|Default body
|}
|}
|}
|}
|}
|}
|}
|}
|}
|}
{|width="100%"
|
{|class="Default2" width="100%"
!Default2 Header
|-
|Default2 Body
|}
|
{|class="ProductsAndServices2" width="100%"
!ProductsAndServices2 Header
|-
|ProductsAndServices2 Body
|}
|
{|class="Tools2" width="100%"
!Tools2 Header
|-
|Tools2 Body
|}
|-
|
{|class="Email2" width="100%"
!Email2 Header
|-
|Email2 Body
|}
|
{|class="DomainNameSystem2" width="100%"
!DomainNameSystem2 Header
|-
|DomainNameSystem2 Body
|}
|
{|class="Policies2" width="100%"
!Policies2 Header
|-
|Policies2 Body
|}
|-
|
{|class="Training2" width="100%"
!Training2 Header
|-
|Training2 Body
|}
|
{|class="WebsiteBuilders2" width="100%"
!WebsiteBuilders2 Header
|-
|WebsiteBuilders2 Body
|}
|
{|class="Troubleshooting2" width="100%"
!Troubleshooting2 Header
|-
|Troubleshooting2 Body
|}
|}
{|width="100%"
|
{|class="Default" width="100%"
!Default Header
|-
|Default Body
|}
|
{|class="ProductsAndServices" width="100%"
!ProductsAndServices Header
|-
|ProductsAndServices Body
|}
|
{|class="Tools" width="100%"
!Tools Header
|-
|Tools Body
|}
|-
|
{|class="Email" width="100%"
!Email Header
|-
|Email Body
|}
|
{|class="DomainNameSystem" width="100%"
!DomainNameSystem Header
|-
|DomainNameSystem Body
|}
|
{|class="Policies" width="100%"
!Policies Header
|-
|Policies Body
|}
|-
|
{|class="Training" width="100%"
!Training Header
|-
|Training Body
|}
|
{|class="WebsiteBuilders" width="100%"
!WebsiteBuilders Header
|-
|WebsiteBuilders Body
|}
|
{|class="Troubleshooting" width="100%"
!Troubleshooting Header
|-
|Troubleshooting Body
|}
|}
答案 0 :(得分：1)
您的所有样式都使用后代选择器而不是子选择器。因此，嵌套表将和应该具有与其父表相同的样式。不是因为继承，而是因为它们匹配选择器。改为使用子选择器：
table.Default > tbody > tr > td { color:black; border:1px solid lightgray; }
这样，子表中的表格单元格不再与选择器匹配。您可以选择保留选择器，只需定义另一个更强大的选择器来覆盖前一个选择器：
table.Default table td { border: 0px none; }
我不会花费数小时来浏览所有CSS和标记，所以我猜其中的一些。如果问题不在于子表正在拾取父表样式，而是子表没有拾取为它们定义的样式，则需要使选择器更强。例如，如果您定义了以下样式：
table.foo td { background-color: #ccc; }
table.bar td { background-color: #ff0; }
使用此标记：
<table class="bar">
<tbody>
<tr>
<td>
<table class="foo">
<tbody>
<tr>
<td>Why am I yellow, and not gray?!</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
文字为黄色，不是灰色：http://jsfiddle.net/gilly3/gzRX6/
为什么呢？因为table.bar td是更强的选择器。为什么？当两个选择器相等时，文档中稍后出现的选择器是更强的选择器。您的解决方案就像在文档中稍后移动子表样式一样简单。但是，最好让它们更明显更强大，例如在混合中添加tr：
table.foo tr td { background-color: #ccc; }
table.bar td { background-color: #ff0; }