.@{layout-prefix-cls}-sider.@{layout-prefix-cls}-light { background: @layout-sider-background-light; .@{layout-prefix-cls}-sider-trigger { color: @layout-trigger-color-light; background: @layout-trigger-background-light; } .@{layout-prefix-cls}-sider-zero-width-trigger { color: @layout-trigger-color-light; background: @layout-trigger-background-light; } }