问如何使用垂直堆叠的选项卡，而不是水平堆叠的选项卡？

EN

/*tabs*/
.tabs {
  position: relative;
  min-height: 200px;
  clear: both;
  margin: 25px 0;
}

.tab {
  float: left;
}

.tab label {
  background: #eee;
  padding: 10px;
  margin-left: -1px;
  position: relative;
  left: 1px;
}

.tab [type=radio] {
  display: none;
}

.tab-content {
  position: absolute;
  top: 28px;
  left: 0;
  background: #f7faff;
  right: 0;
  bottom: 0;
  padding: 20px;
  border: 1px solid red;
}

[type=radio]:checked ~ label {
  background: white;
  border-bottom: 1px solid white;
  z-index: 2;
}

[type=radio]:checked ~ label ~ .tab-content {
  z-index: 1;
}