.item_collapse {
  display: none;
}

.section_feature_install,
.section_feature_update {
  position: relative;
  transition: all 0.3s ease;
  top: 0;
}

.section_feature_install.expand,
.section_feature_update.expand {
  top: -120px;
}

.header_feature_use.feature_use_expand .buttons {
  margin-bottom: 120px;
}

.header_feature_use .buttons .img_collapse {
  display: none;
}
.header_feature_use .buttons .feature_update_button.feature_update_button_expand .img_collapse {
  display: inline;
}
.header_feature_use .buttons .feature_update_button.feature_update_button_expand .img_expand {
  display: none;
}
.header_feature_use .buttons .feature_install_button.feature_install_button_expand .img_collapse {
  display: inline;
}
.header_feature_use .buttons .feature_install_button.feature_install_button_expand .img_expand {
  display: none;
}

@media only screen and (max-width: 767.9px) {
  .header_feature_use.feature_use_expand .buttons {
    margin-bottom: 0;
  }
  .section_feature_install.expand,
  .section_feature_update.expand {
    top: 0;
  }
}