table{border-collapse:collapse;border-spacing:0;border-left:1px solid #888;border-top:1px solid #888;}
th,td{border-right:1px solid #888;border-bottom:1px solid #888;padding:5px 15px;}
th{font-weight:bold;}
原文：https://www.cnblogs.com/tianmiaogongzuoshi/p/11412559.html