.layui-layer-btn{text-align:center !important}@font-face{font-family:'Lato';src:url("/flat-ui/fonts/lato/lato-black.eot");src:url("/flat-ui/fonts/lato/lato-black.eot?#iefix") format("embedded-opentype"),url("/flat-ui/fonts/lato/lato-black.woff") format("woff"),url("/flat-ui/fonts/lato/lato-black.ttf") format("truetype"),url("/flat-ui/fonts/lato/lato-black.svg#latoblack") format("svg");font-weight:900;font-style:normal}@font-face{font-family:'Lato';src:url("/flat-ui/fonts/lato/lato-bold.eot");src:url("/flat-ui/fonts/lato/lato-bold.eot?#iefix") format("embedded-opentype"),url("/flat-ui/fonts/lato/lato-bold.woff") format("woff"),url("/flat-ui/fonts/lato/lato-bold.ttf") format("truetype"),url("/flat-ui/fonts/lato/lato-bold.svg#latobold") format("svg");font-weight:bold;font-style:normal}@font-face{font-family:'Lato';src:url("/flat-ui/fonts/lato/lato-bolditalic.eot");src:url("/flat-ui/fonts/lato/lato-bolditalic.eot?#iefix") format("embedded-opentype"),url("/flat-ui/fonts/lato/lato-bolditalic.woff") format("woff"),url("/flat-ui/fonts/lato/lato-bolditalic.ttf") format("truetype"),url("/flat-ui/fonts/lato/lato-bolditalic.svg#latobold-italic") format("svg");font-weight:bold;font-style:italic}@font-face{font-family:'Lato';src:url("/flat-ui/fonts/lato/lato-italic.eot");src:url("/flat-ui/fonts/lato/lato-italic.eot?#iefix") format("embedded-opentype"),url("/flat-ui/fonts/lato/lato-italic.woff") format("woff"),url("/flat-ui/fonts/lato/lato-italic.ttf") format("truetype"),url("/flat-ui/fonts/lato/lato-italic.svg#latoitalic") format("svg");font-weight:normal;font-style:italic}@font-face{font-family:'Lato';src:url("/flat-ui/fonts/lato/lato-light.eot");src:url("/flat-ui/fonts/lato/lato-light.eot?#iefix") format("embedded-opentype"),url("/flat-ui/fonts/lato/lato-light.woff") format("woff"),url("/flat-ui/fonts/lato/lato-light.ttf") format("truetype"),url("/flat-ui/fonts/lato/lato-light.svg#latolight") format("svg");font-weight:300;font-style:normal}@font-face{font-family:'Lato';src:url("/flat-ui/fonts/lato/lato-regular.eot");src:url("/flat-ui/fonts/lato/lato-regular.eot?#iefix") format("embedded-opentype"),url("/flat-ui/fonts/lato/lato-regular.woff") format("woff"),url("/flat-ui/fonts/lato/lato-regular.ttf") format("truetype"),url("/flat-ui/fonts/lato/lato-regular.svg#latoregular") format("svg");font-weight:normal;font-style:normal}@font-face{font-family:'Flat-UI-Pro-Icons';src:url("/flat-ui/fonts/glyphicons/flat-ui-pro-icons-regular.eot");src:url("/flat-ui/fonts/glyphicons/flat-ui-pro-icons-regular.eot?#iefix") format("embedded-opentype"),url("/flat-ui/fonts/glyphicons/flat-ui-pro-icons-regular.woff") format("woff"),url("/flat-ui/fonts/glyphicons/flat-ui-pro-icons-regular.ttf") format("truetype"),url("/flat-ui/fonts/glyphicons/flat-ui-pro-icons-regular.svg#flat-ui-pro-icons-regular") format("svg")}@font-face{font-family:SiYuan-Bold;src:url("/fonts/siyuan-black/SourceHanSansCN-Normal.woff")}*{font-family:SiYuan-Bold,"Lato",Helvetica,Arial,sans-serif}.course-group-logo{width:200px;height:200px}.course-index-img{width:356px;height:200px;border:1px solid #efefef;background-color:#e6e6e6}.file-upload-box .add-file .add-file-btn{display:inline-block;width:73px;height:25px;color:#fff;overflow:hidden;padding:2px 5px;position:relative;line-height:24px;text-align:center;font-size:14px;border-radius:2px;background:#a56008}.file-upload-box .add-file .add-file-btn .file-input{opacity:0;width:100%;height:100%;position:absolute;top:0;left:0;background:linear-gradient(30deg,#1e9fff,#5dc8fb);background:-moz-linear-gradient(30deg,#1e9fff,#5dc8fb);background:-webkit-linear-gradient(30deg,#1e9fff,#5dc8fb)}.file-upload-box .file-list-box .file-list .file-item{color:#fff;padding:2px 5px;font-size:15px;border-radius:3px;margin-bottom:3px;position:relative;overflow:hidden;height:36px}.file-upload-box .file-list-box .file-list .file-item .text{z-index:2;background:transparent;position:absolute;width:97%;line-height:28px;padding:5px 10px}.file-upload-box .file-list-box .file-list .file-item .text .size{float:right}.file-upload-box .file-list-box .file-list .file-item .text .del{float:right;margin-right:10px;color:#fff;cursor:pointer;background:#f50;padding:0 13px}.file-upload-box .file-list-box .file-list .file-item .text .name{background:transparent;border:0;color:#fff;padding:2px 0;width:80%}.file-upload-box .file-list-box .file-list .file-item .progress{background:#a0a0a0;position:absolute;width:100%;height:100%;z-index:1;overflow:hidden}.file-upload-box .file-list-box .file-list .file-item .progress .progress-bar{background:#31a4f4;height:100%;overflow:hidden}*::-webkit-scrollbar{width:8px;height:1px}*::-webkit-scrollbar-thumb{border-radius:5px;border:1px solid #9a9a9a;background:#989696}*::-webkit-scrollbar-track{-webkit-box-shadow:inset 0 0 5px #00000059;-moz-box-shadow:inset 0 0 5px #00000059;box-shadow:inset 0 0 5px #00000059}.left-nav{overflow-y:auto}#nav li{border:none !important}#nav li a{padding-top:15px !important;padding-bottom:15px !important}.container .left_open i{background:#393d49;color:#fff}.layui-tree-main{cursor:pointer;padding-right:10px}.layui-tree-icon{height:12px;line-height:12px;width:14px;text-align:center;border:1px solid #b1b3b3}.layui-tree-icon .layui-icon{color:#888}.layui-tree-txt{display:inline-block;vertical-align:middle;color:#000;font-size:14px}.layui-tree-entry{position:relative;padding:4px 0;height:30px;white-space:nowrap}.layui-tree-line .layui-tree-set .layui-tree-set:after{top:20px;border-top:2px #dadada dotted}.layui-tree-line .layui-tree-set:before{border-left:2px #dadada dotted}.qianshan-tree{border:1px solid #dadada;height:400px;overflow-y:auto}.course-video-box{border:1px solid #e2e2e2;display:inline-block;padding:10px;margin:2px}.course-video{width:400px}.course-video.empty-src{display:none}.course-video-tips{color:#f14742}.course-video-tips-free{color:#0bbdad}.videoFileBtn{height:30px;line-height:30px;padding:0 12px;text-align:center;background:#0ba092;color:#fff;display:inline-block;position:relative;font-size:12px;cursor:pointer}.videoFileBtn .videoText{display:inline-block;cursor:pointer;z-index:2;width:100%;height:100%}.videoFileBtn .videoFile{display:inline-block;width:100%;height:100%;position:absolute;opacity:0;left:0;top:0;cursor:pointer;z-index:1}.videoFileBtn .upload-status{color:#000;font-size:13px}.video-upload-progress{width:100%;background:#6d6a6a;position:relative;height:20px;display:none}.video-upload-progress .progress-bar{background:#960000;height:100%;width:0}.video-upload-progress .video-upload-size{position:absolute;top:0;width:100%;text-align:center;color:#fff;font-size:12px}#open-message{text-align:left;width:100%;height:100%;overflow:scroll;background:#616161;color:#fff}