.header-bg{
  background: linear-gradient(to bottom, #03605c, #18ae4f);
  height: 335px;
  width: 100%;
  top: 0;
  position: absolute;
  z-index: 0;
}
.header-bg2{
  background: linear-gradient(to bottom, #03605c, #18ae4f);
  height: 200px;
  width: 100%;
  top: 0;
  position: absolute;
  z-index: 0;
}

/* 吸顶状态下的样式 */
.nutui-sticky--fixed {
  .header-bg {
    height: 100%;
  }
}