.course-sidebar-result { display: none; position: absolute; width: 260px; margin: 39px 0 0 -1px; padding-left: 0; list-style-type: none; border: 1px solid #e6e8e9; background-color: #fff; box-shadow: 0px 1px 2px #d5d7d8; font-size: 12px; }
.course-sidebar-result > li { line-height: 30px; padding-left: 12px; }

请问两处padding-left应该怎么理解啊