table 边界的样式

table {
  border: 1px solid #000;
  padding: 0;
  border-collapse: collapse;
  table-layout: fixed;
  margin-top: 10px;
}
table td {
  height: 30px;
  border: 1px solid #000;
  background: #fff;
  font-size: 15px;
  padding: 3px 3px 3px 8px;
  color: #000;
  width: 160px;
}