CSS同一页面中具有不同ID的多个表

Question

我们在同一页面中有两个不同的表。另一个目的需要使用不同的ID。因此，我们在Style中创建了多个CSS表格元素。但是只有第一个在工作。如果我将客户的设计放在首位，它将被应用，但一次只能应用一次。

#salescss {
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
    border-collapse: collapse;
    width: 100%;
}

#salescss td, #salescss th {
    border: 1px solid #ddd;
    padding: 8px;
}

#salescss tr:nth-child(even){background-color: #f2f2f2;}

#salescss tr:hover {background-color: #ddd;}

#salescss th {
    padding-top: 12px;
    padding-bottom: 12px;
    text-align: left;
    background-color: #357EC7;
    color: white;
body {font-family: Arial;}


 #customers {
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
    border-collapse: collapse;
    width: 100%;
}

#customers td, #customers th {
    border: 1px solid #ddd;
    padding: 8px;
}

#customers tr:nth-child(even){background-color: #f2f2f2;}

#customers tr:hover {background-color: #ddd;}

#customers th {
    padding-top: 12px;
    padding-bottom: 12px;
    text-align: left;
    background-color: #357EC7;
    color: white;
body {font-family: Arial;}

Answer 1

您在}和#salescss th {之后缺少#customers th {

#salescss {
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
    border-collapse: collapse;
    width: 100%;
}    
#salescss td, #salescss th {
    border: 1px solid #ddd;
    padding: 8px;
}

#salescss tr:nth-child(even){background-color: #f2f2f2;}

#salescss tr:hover {background-color: #ddd;}

#salescss th {
    padding-top: 12px;
    padding-bottom: 12px;
    text-align: left;
    background-color: #357EC7;
    color: white;
    }
body {font-family: Arial;}


 #customers {
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
    border-collapse: collapse;
    width: 100%;
}

#customers td, #customers th {
    border: 1px solid #ddd;
    padding: 8px;
}

#customers tr:nth-child(even){background-color: #f2f2f2;}

#customers tr:hover {background-color: #ddd;}

#customers th {
    padding-top: 12px;
    padding-bottom: 12px;
    text-align: left;
    background-color: #357EC7;
    color: white;
    }
body {font-family: Arial;}