/*：这只是演示代码。源码下载链接: http://www.bootstrapmb.com/item/207(这个说明仅在演示里会看到,下载的源码里没有)*//** * Nestable */.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-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:700}.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)}/** * Nestable Extras */.nestable-lists {    display:block;    clear:both;    padding:30px 0;    width:100%;    border:0;    border-top:2px solid #ddd;    border-bottom:2px solid #ddd}#nestable-menu {    padding:0;    margin: 0 0 10px;}#nestable-output,#nestable2-output {    width:100%;    height:7em;    font-size:.75em;    line-height:1.333333em;    font-family:Consolas,monospace;    padding:5px;    box-sizing:border-box;    -moz-box-sizing:border-box}#nestable2 .dd-handle {    color:#fff;    border: 1px solid #999;    background: #aaa;}#nestable2 .dd-handle:hover {    background:#bbb}#nestable2 .dd-item >button:before {    color:#fff}.dd-hover >.dd-handle {    background:#2ea8e5!important}/** * Nestable Draggable Handles */.dd3-content {    display:block;    height:30px;    margin:5px 0;    padding:5px 10px 5px 40px;    color:#333;    text-decoration:none;    font-weight:700;    border:1px solid #ccc;    background:#fafafa;    background:-webkit-linear-gradient(top,#fafafa 0%,#eee 100%);    background:-moz-linear-gradient(top,#fafafa 0%,#eee 100%);    background:linear-gradient(top,#fafafa 0%,#eee 100%);    -webkit-border-radius:3px;    border-radius:3px;    box-sizing:border-box;    -moz-box-sizing:border-box}.dd3-content:hover {    color:#2ea8e5;    background:#fff}.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 #aaa;    background:#ddd;    background:-webkit-linear-gradient(top,#ddd 0%,#bbb 100%);    background:-moz-linear-gradient(top,#ddd 0%,#bbb 100%);    background:linear-gradient(top,#ddd 0%,#bbb 100%);    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:400}.dd3-handle:hover {    background:#ddd}/*：这只是演示代码。源码下载链接: http://www.bootstrapmb.com/item/207(这个说明仅在演示里会看到,下载的源码里没有)*/