$(".list li").css({backgroundColor:"#bbdefd", border:"1px dashed #303f9f"}); //하위 선택자
$(".list > li").css({backgroundColor:"#bbdefd", border:"1px dashed #303f9f"}); //자식 선택자
$(".list5 + li").css({backgroundColor:"#bbdefd", border:"1px dashed #303f9f"}); //형제 선택자
$(".list5 ~ li").css({backgroundColor:"#bbdefd", border:"1px dashed #303f9f"}); //형제들 선택자
