@mixin flex($direction: row) {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: $direction;
}

/* 几行出现省略号 */
@mixin line-feed($line: 1) {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: $line;
  overflow: hidden;
  text-overflow: ellipsis;
}