.lg-dev-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
/* 位置编排：左侧仅「+ / @」动作组；右侧依次为「基础模型 → 语音 → 发送」。
   用 flex order + auto 外边距实现，避免改动 React 托管的 DOM 结构。 */
.develop-composer__toolbar > .lg-dev-actions {
  order: 0;
  margin-left: 0;
  margin-right: auto;         /* 占据左侧空白，把后续元素推到最右 */
}
.develop-composer__toolbar > .develop-composer__left { order: 1; }
.develop-composer__toolbar > .lg-dev-mic { order: 2; }
.develop-composer__toolbar > .develop-composer__send { order: 3; }
.lg-dev-actbtn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.lg-dev-actbtn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: rgba(0, 0, 0, 0.75);
}
/* 需求调整：输入框左下角「基础模型」选择器去掉外框和底色 */
.develop-composer__left > .develop-composer__chip,
.develop-composer__left > .develop-composer__chip:hover {
  border-color: transparent !important;
  background: transparent !important;
}