CSS - 垂直对齐DIV内容

.container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
}

.container {
  display: grid;
  align-items: center;
  justify-items: center;
  height: 100px;
}

.container {
  position: relative;
  height: 100px;
}
.content {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.container {
  height: 100px;
  padding-top: 50%;
  box-sizing: border-box;
}
.content {
  margin-top: -50%;
}

.container {
  display: table-cell;
  vertical-align: middle;
  height: 100px;
}