html table 边框
<html><head> <style> table{border-collapse:collapse;border-spacing:0;border-left:1px solid #888;border-top:1px solid #888;background:#efefef;} th,td{border-right:1px solid #888;border-bottom:1px solid #888;padding:5px 15px;} th{font-weight:bold;background:#ccc;} table.gui-table {border-collapse:collapse;border-spacing:0;border-left:1px solid #888;border-top:1px solid #888;background:#efefef; margin: 0 auto;} table.gui-table th,.gui-table td{border-right:1px solid #888;border-bottom:1px solid #888;padding:5px 15px;} table.gui-table th{font-weight:bold;background:#ccc;} </style></head><body> <table> <tr> <th>table head (row1, col1)</th> <th>table head (row1, col2)</th> <th>table head (row1, col3)</th> </tr> <tr> <td>table data (row1, col1)</td> <td>table data (row1, col2)</td> <td>table data (row1, col3)</td> </tr> <tr> <td>table data (row2, col1)</td> <td>table data (row2, col2)</td> <td>table data (row2, col3)</td> </tr> </table></body></html>?