border-collapse:collapse;
table,th,td{
border: 1px dashed red; /*此时会出现边框重叠*/
border-collapse: collapse;/* 合并相邻边框*/
}
border-collapse:collapse;
table,th,td{
border: 1px dashed red; /*此时会出现边框重叠*/
border-collapse: collapse;/* 合并相邻边框*/
}