Вот мой ответ:
table {
margin: auto;
width: 100%;
border-collapse: collapse;
border-spacing: 0;
}
th,
td {
padding: 5px 10px;
}
tr {
border-bottom: 1px solid #ccc;
}
thead th {
border-bottom: 2px solid #ddd;
}
tr.responsive-table-item .responsive-table-cell {
display: none;
}
@media (max-width: 768px) {
.table-header {
display: none;
}
tr.responsive-table-item {
display: block;
}
tr.responsive-table-item .responsive-table-cell {
display: inline-block;
}
tr.responsive-table-item td:first-child {
background-color: #ccc;
display: block;
text-align: center;
width: 100%;
}
tr.responsive-table-item td,
tr.responsive-table-item th {
display: inline-block;
width: calc(50% - 22px);
word-break: break-all;
vertical-align: top;
}
}
<table class="responsive-table">
<thead>
<tr class="table-header">
<th></th>
<th class="right-header">Step 1</th>
<th class="right-header">Step 2</th>
<th class="right-header">Step 3</th>
<th class="right-header">Step 4</th>
<th class="right-header">Step 5</th>
<th class="right-header">Step 6</th>
<th class="right-header">Step 7</th>
<th class="right-header">Step 8</th>
</tr>
</thead>
<tbody>
<tr class="responsive-table-item">
<td class="left-header">Test</td>
<th class="responsive-table-cell">Step 1</th>
<td class="left-header"> $57.36</td>
<th class="responsive-table-cell">Step 2</th>
<td class="left-header"> $58.94</td>
<th class="responsive-table-cell">Step 3</th>
<td class="left-header"> $60.56</td>
<th class="responsive-table-cell">Step 4</th>
<td class="left-header"> $62.23</td>
<th class="responsive-table-cell">Step 5</th>
<td class="left-header"> $65.70</td>
<th class="responsive-table-cell">Step 6</th>
<td class="left-header"> $69.37</td>
<th class="responsive-table-cell">Step 7</th>
<td class="left-header"> $73.23</td>
<th class="responsive-table-cell">Step 8</th>
<td class="left-header"> $77.31</td>
</tr>
<tr class="responsive-table-item">
<td class="left-header">Test</td>
<th class="responsive-table-cell">Step 1</th>
<td class="left-header"> $4,588.80</td>
<th class="responsive-table-cell">Step 2</th>
<td class="left-header"> $4,715.20</td>
<th class="responsive-table-cell">Step 3</th>
<td class="left-header"> $4,844.80</td>
<th class="responsive-table-cell">Step 4</th>
<td class="left-header"> $4,978.40</td>
<th class="responsive-table-cell">Step 5</th>
<td class="left-header"> $5,256.00</td>
<th class="responsive-table-cell">Step 6</th>
<td class="left-header"> $5,549.60</td>
<th class="responsive-table-cell">Step 7</th>
<td class="left-header"> $5,858.40</td>
<th class="responsive-table-cell">Step 8</th>
<td class="left-header"> $6,184.80</td>
</tr>
<tr class="responsive-table-item">
<td class="left-header">Test</td>
<th class="responsive-table-cell">Step 1</th>
<td class="left-header"> $119,767.68</td>
<th class="responsive-table-cell">Step 2</th>
<td class="left-header"> $123,066.72</td>
<th class="responsive-table-cell">Step 3</th>
<td class="left-header"> $126,449.28</td>
<th class="responsive-table-cell">Step 4</th>
<td class="left-header"> $129,936.24</td>
<th class="responsive-table-cell">Step 5</th>
<td class="left-header"> $137,181.60</td>
<th class="responsive-table-cell">Step 6</th>
<td class="left-header"> $144,844.56</td>
<th class="responsive-table-cell">Step 7</th>
<td class="left-header"> $152,904.24</td>
<th class="responsive-table-cell">Step 8</th>
<td class="left-header"> $161,423.28</td>
</tr>
</tbody>
</table>