.node-news.node-teaser {
}
.node-news.node-teaser .group-left {
  width: 270px;
}
.node-news.node-teaser .group-right {
  width: auto;
  float: none;
  margin-left: 270px;
}

.node-news.view-mode-core_small_teaser  .group-left {
  width: 110px;
}
.node-news.view-mode-core_small_teaser  .group-right {
  width: auto;
  float: none;
  margin-left: 110px;
}