.dd{position:relative;display:block;margin:0;padding:0;max-width:600px;list-style:none;font-size:13px;line-height:20px;}.dd-list{display:block;position:relative;margin:0;padding:0;list-style:none;}.dd-list .dd-list{padding-left:30px;}.dd-collapsed .dd-list{display:none;}.dd-item,.dd-empty,.dd-placeholder{display:block;position:relative;margin:0;padding:0;min-height:20px;font-size:13px;line-height:20px;}.dd-handle{display:block;height:30px;margin:5px 0;padding:5px 10px;cursor:move;color:#333;text-decoration:none;font-weight:bold;border:1px solid #ccc;background:#F5F5F5;box-sizing:border-box;-moz-box-sizing:border-box;}.dd-handle:hover{color:#2ea8e5;background:#fff;}.dd-item>button{display:block;position:relative;cursor:pointer;float:left;width:25px;height:20px;margin:5px 0;padding:0;text-indent:100%;white-space:nowrap;overflow:hidden;border:0;background:transparent;font-size:12px;line-height:1;text-align:center;font-weight:bold;}.dd-item>button:before{content:'+';display:block;position:absolute;width:100%;text-align:center;text-indent:0;}.dd-item>button[data-action="collapse"]:before{content:'-';}.dd-placeholder,.dd-empty{margin:5px 0;padding:0;min-height:30px;background:#f2fbff;border:1px dashed #b6bcbf;box-sizing:border-box;-moz-box-sizing:border-box;}.dd-empty{border:1px dashed #bbb;min-height:100px;background-color:#e5e5e5;background-image:-webkit-linear-gradient(45deg,#fff 25%,transparent 25%,transparent 75%,#fff 75%,#fff),-webkit-linear-gradient(45deg,#fff 25%,transparent 25%,transparent 75%,#fff 75%,#fff);background-image:-moz-linear-gradient(45deg,#fff 25%,transparent 25%,transparent 75%,#fff 75%,#fff),-moz-linear-gradient(45deg,#fff 25%,transparent 25%,transparent 75%,#fff 75%,#fff);background-image:linear-gradient(45deg,#fff 25%,transparent 25%,transparent 75%,#fff 75%,#fff),linear-gradient(45deg,#fff 25%,transparent 25%,transparent 75%,#fff 75%,#fff);background-size:60px 60px;background-position:0 0,30px 30px;}.dd-dragel{position:absolute;pointer-events:none;z-index:9999;}.dd-dragel>.dd-item .dd-handle{margin-top:0;}.dd-dragel .dd-handle{-webkit-box-shadow:2px 4px 6px 0 rgba(0,0,0,.1);box-shadow:2px 4px 6px 0 rgba(0,0,0,.1);}.dd3-content{display:block;height:30px;margin:5px 0;padding:5px 10px 5px 40px;color:#333;text-decoration:none;font-weight:bold;border:1px solid #ccc;background:#F5F5F5;box-sizing:border-box;-moz-box-sizing:border-box;}.dd3-content:hover{color:#2ea8e5;background:#d5d5d5;}.dd-dragel>.dd3-item>.dd3-content{margin:0;}.dd3-item>button{margin-left:30px;}.dd3-handle{position:absolute;margin:0;left:0;top:0;cursor:pointer;width:30px;text-indent:100%;white-space:nowrap;overflow:hidden;border:1px solid #ccc;background:#d5d5d5;border-top-right-radius:0;border-bottom-right-radius:0;}.dd3-handle:before{content:'≡';display:block;position:absolute;left:0;top:3px;width:100%;text-align:center;text-indent:0;color:#fff;font-size:20px;font-weight:normal;}.dd3-handle:hover{background:#404040;border:1px solid #404040;}