ant-design/style/core/layouts.less

// Grid system
.row {
  .make-row();
  display: block;
}

.row-flex {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;

  &:before,
  &:after {
    display: flex;
  }
}

// x轴原点
.row-flex-start {
  justify-content: flex-start;
}

// x轴居中
.row-flex-center {
  justify-content: center;
}

// x轴反方向
.row-flex-end {
  justify-content: flex-end;
}

// x轴平分
.row-flex-space-between {
  justify-content: space-between;
}

// x轴有间隔地平分
.row-flex-space-around {
  justify-content: space-around;
}

// 顶部对齐
.row-flex-top {
  align-items: flex-start;
}

// 居中对齐
.row-flex-middle {
  align-items: center;
}

// 底部对齐
.row-flex-bottom {
  align-items: flex-end;
}

.col {
  position: relative;
  display: block;
  float: left;
  flex: 0 0 auto;
}

.make-grid-columns();
.make-grid();

// Extra small grid
//
// Columns, offsets, pushes, and pulls for extra small devices like
// smartphones.

.make-grid(-xs);

// Small grid
//
// Columns, offsets, pushes, and pulls for the small device range, from phones
// to tablets.

@media (min-width: @screen-sm-min) {
  .make-grid(-sm);
}


// Medium grid
//
// Columns, offsets, pushes, and pulls for the desktop device range.

@media (min-width: @screen-md-min) {
  .make-grid(-md);
}


// Large grid
//
// Columns, offsets, pushes, and pulls for the large desktop device range.

@media (min-width: @screen-lg-min) {
  .make-grid(-lg);
}