SOURCE

<div id="accordion" class="accordion">
    <div class="accordion-item">
        <h3 class="accordion-title">
            <em class="ico">
            </em>
            为什么JS社区大量采用未发布或者未广泛支持的语言特性？
            <i>
            </i>
        </h3>
        <div class="accordion-content">
            <p>
                有不少其他答案说是因为JS太差。我下面的答案已经说了，这不是根本性的原因。但除此之外，我还要纠正一些对JS具体问题的误解。JS当初是被作为脚本语言设计的，所以某些问题并不是JS设计得差或者是JS设计者的失误。比如var的作用域问题，并不是“错误”，而是当时绝大部分脚本语言都是这样的，如perl/php/sh等。模块的问题也是，脚本语言几乎都没有模块/命名空间功能。弱类型、for-in之类的问题也是，只不过现在用那些老的脚本语言的人比较少，所以很多人都误以为是JS才有的坑。另外有人说JS是半残语言，满足不了开发需求，1999年就该死。半残这个嘛，就夸张了。JS虽然有很多问题，但是设计总体还是优秀的。——来自知乎@贺师俊
            </p>
        </div>
    </div>
    <div class="accordion-item">
        <h3 class="accordion-title">
            <em class="ico">
            </em>
            为什么JS社区大量采用未发布或者未广泛支持的语言特性？
            <i>
            </i>
        </h3>
        <div class="accordion-content">
            <p>
                有不少其他答案说是因为JS太差。我下面的答案已经说了，这不是根本性的原因。但除此之外，我还要纠正一些对JS具体问题的误解。JS当初是被作为脚本语言设计的，所以某些问题并不是JS设计得差或者是JS设计者的失误。比如var的作用域问题，并不是“错误”，而是当时绝大部分脚本语言都是这样的，如perl/php/sh等。模块的问题也是，脚本语言几乎都没有模块/命名空间功能。弱类型、for-in之类的问题也是，只不过现在用那些老的脚本语言的人比较少，所以很多人都误以为是JS才有的坑。另外有人说JS是半残语言，满足不了开发需求，1999年就该死。半残这个嘛，就夸张了。JS虽然有很多问题，但是设计总体还是优秀的。——来自知乎@贺师俊
            </p>
        </div>
    </div>
    <div class="accordion-item">
        <h3 class="accordion-title">
            <em class="ico">
            </em>
            为什么JS社区大量采用未发布或者未广泛支持的语言特性？
            <i>
            </i>
        </h3>
        <div class="accordion-content">
            <p>
                有不少其他答案说是因为JS太差。我下面的答案已经说了，这不是根本性的原因。但除此之外，我还要纠正一些对JS具体问题的误解。JS当初是被作为脚本语言设计的，所以某些问题并不是JS设计得差或者是JS设计者的失误。比如var的作用域问题，并不是“错误”，而是当时绝大部分脚本语言都是这样的，如perl/php/sh等。模块的问题也是，脚本语言几乎都没有模块/命名空间功能。弱类型、for-in之类的问题也是，只不过现在用那些老的脚本语言的人比较少，所以很多人都误以为是JS才有的坑。另外有人说JS是半残语言，满足不了开发需求，1999年就该死。半残这个嘛，就夸张了。JS虽然有很多问题，但是设计总体还是优秀的。——来自知乎@贺师俊
            </p>
        </div>
    </div>
</div>

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a,a:hover{color:#333;}
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body {
    margin: 0;
    font-family:"Hiragino Sans GB", "Microsoft Yahei", sans-serif;
    font-size: 14px;
    color: #333333;
}
.clearfix:after, .clearfix:before {
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.clearfix:after {
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ul.icon_lists li {
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ul.icon_lists li:hover {
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.col-1,.col-2,.col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-10,.col-11,.col-11,.col-12{
    background: rgba(0,160,233,.7);
    padding: 16px 0;
    color: #fff;
    text-align: center;
}
.col-1:nth-of-type(odd),.col-1:nth-of-type(odd),.col-2:nth-of-type(odd),.col-3:nth-of-type(odd),.col-4:nth-of-type(odd),.col-5:nth-of-type(odd),.col-6:nth-of-type(odd),.col-7:nth-of-type(odd),.col-8:nth-of-type(odd),.col-9:nth-of-type(odd),.col-10:nth-of-type(odd),.col-11:nth-of-type(odd),.col-11:nth-of-type(odd),.col-12:nth-of-type(odd) {
    background: #00a0e9;
}
.show-grid{
    margin-bottom: 20px;
}


.aside-title {
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    padding: 0 24px;
}
.aside-title span {
    border-bottom: 1px solid #e9e9e9;
    display: block;
    font-size: 18px;
    font-weight: 700;
    line-height: 65px;
    height: 65px;
}
.sidebar {
    background: #fff;
    border-right: 1px solid #e9e9e9;
    overflow-x: hidden;
    overflow-y: auto;
    position: fixed;
    top: 0px;
    left: 0;
    width: 256px;
    bottom: 0;
    z-index: 10;
}

.sidebar li{
    padding: 0 24px;
    line-height: 42px;
    height: 42px;
}
.main-wrapper {
    background: #fff;
    border-radius: 6px;
    overflow: hidden;
    padding: 24px;
    position: relative;
    margin: 0 16px 0 272px;
}
.code-box {
    border: 1px solid #ebedf0;
    border-radius: 2px;
    display: inline-block;
    width: 100%;
    position: relative;
    margin: 0 0 16px;
    -webkit-transition: all .2s;
    transition: all .2s;
}
.code-box-demo {
    border-bottom: 1px solid #ebedf0;
    padding: 42px 24px 50px;
    color: rgba(0,0,0,.65);
}
.code-box-meta.markdown {
    position: relative;
    padding: 18px 32px;
    border-radius: 0 0 2px 2px;
    -webkit-transition: background-color .4s;
    transition: background-color .4s;
    width: 100%;
    font-size: 14px;
}
.code-box-title {
    position: absolute;
    top: -14px;
    padding: 1px 8px;
    margin-left: -8px;
    color: #777;
    border-radius: 2px 2px 0 0;
    background: #fff;
    -webkit-transition: background-color .4s;
    transition: background-color .4s;
    font-weight: 500px;
}

.code-box-title a{
    color: #314659;
    font-size: 14px;
    font-weight: 700;
}








.pagination {
    margin: 20px 0;
}
.pagination ul {
    display: inline-block;
    margin-bottom: 0;
    margin-left: 0;
}
.pagination ul>li {
    display: inline;
}
.pagination ul>li>a, .pagination ul>li>span {
    float: left;
    padding: 4px 12px;
    line-height: 20px;
    text-decoration: none;
    background-color: #fff;
    border: 1px solid #ddd;
    margin-right: 8px;
    border-radius:4px;
}
.pagination ul>.active>a, .pagination ul>.active>span {
    color: #1890ff;
    border: 1px solid #1890ff;
    -webkit-transition: color .3s ease;
    transition: color .3s ease;
}
.pagination ul>li>a:hover, .pagination ul>li>a:focus, .pagination ul>.active>a, .pagination ul>.active>span {
    color: #1890ff;
    border: 1px solid #1890ff;
}
.pagination-centered {
    text-align: center;
}
.pagination-righted {
    text-align: right;
}
/*分页END*/




.breadcrumb {
    padding: 8px 15px;
    margin: 0 0 20px;
    list-style: none;
}
.breadcrumb>li {
    display: inline-block;
}
.breadcrumb>li>.divider {
    padding: 0 5px;
    color: #ccc;
}
.breadcrumb>.active {
    color: #999;
}
/*面包屑END*/


.table {
    width: 100%;
    margin-bottom: 18px;
    max-width: 100%;
    background-color: transparent;
    border-collapse: collapse;
    border-spacing: 0;
}
.table caption + thead tr:first-child th, .table caption + thead tr:first-child td, .table colgroup + thead tr:first-child th, .table colgroup + thead tr:first-child td, .table thead:first-child tr:first-child th, .table thead:first-child tr:first-child td {
    border-top: 0;
}

.table thead th {
    vertical-align: bottom;
}

.table th {
    font-weight: bold;
}
.table th, .table td {
    padding: 16px;
    line-height: 18px;
    text-align: left;
    vertical-align: middle;
    border-top: 1px solid #e8e8e8;
}
.table.table-bordered {
    border: 1px solid #e8e8e8;
    border-collapse: separate;
    border-left: 0;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
}
.table.table-bordered th, .table.table-bordered td {
    border-left: 1px solid #e8e8e8;
}
.table.table-bordered th {
    background-color: #fafafa;
}
/*表格END*/



.form-group {
    margin-bottom: 15px;
    position: relative;
}
.form-group label {
    display: inline-block;
    max-width: 100%;
    margin-bottom: 5px;
    font-weight: 700;
}
.form-control {
    display: block;
    width: 100%;
    height: 34px;
    padding: 6px 12px;
    font-size: 14px;
    line-height: 1.42857143;
    color: #555;
    background-color: #fff;
    background-image: none;
    border: 1px solid #e6e6e6;
    border-radius: 4px;
    -webkit-transition: all .3s;
    transition: all .3s;
}
.form-control:focus {
    outline: 0;
    -webkit-box-shadow: 0 0 0 2px rgba(24,144,255,.2);
    box-shadow: 0 0 0 2px rgba(24,144,255,.2);
    border-color: #40a9ff;
}
.checkbox, .radio {
    position: relative;
    display: block;
    margin-top: 10px;
    margin-bottom: 10px;
}
.checkbox label, .radio label{
    cursor: pointer;
}
.checkbox input,.radio input{
    margin-right:4px;
}
.form-inline .form-group {
    display: inline-block;
    margin-bottom: 0;
    vertical-align: middle;
}
.form-inline .form-control {
    display: inline-block;
    width: auto;
    vertical-align: middle;
}

.form-horizontal .control-label {
    padding-top: 7px;
    margin-bottom: 0;
    text-align: right;
}
.form-group:after {
    content: '';
    display: block;
    clear: both;
    height: 0;
    overflow: hidden;
}
.checkbox-inline, .radio-inline {
    position: relative;
    display: inline-block;
    padding-right: 20px;
    margin-bottom: 0;
    font-weight: 400;
    vertical-align: middle;
    cursor: pointer;
}
.Validform_checktip {
    font-size: 12px;
    line-height: 18px;
    vertical-align: middle;
    position: relative;
    color: #555555;
    display: block;
    border-radius: 4px;
}
.Validform_wrong {
    border: 1px solid #fcdbd9;
    background-color: #fef0ef;
    padding: 8px 15px;
    margin-top: 5px;
    color: #f5222d;
}
.Validform_right {
    border: 1px solid #b7eb8f;
    background-color: #f6ffed;
    padding: 8px 15px;
    margin-top: 5px;
    color: #52c41a;
}
/*表单END*/


.msg.msg-error {
    color: #ea4a36;
}
.msg {
    font-size: 12px;
    line-height: 18px;
    vertical-align: middle;
    display: inline-block;
    position: relative;
    color: #555555;   
    margin-bottom: 16px; 
}
.msg.msg-error > .msg-con {
    border: 1px solid #ffe3e0;
    background-color: #fff2f2;
}
.msg > .msg-con {
    -webkit-border-radius: 2px;
    -moz-border-radius: 2px;
    border-radius: 2px;
    padding:8px 15px;
}
.msg > .msg-icon {
    display: inline-block;
    position: absolute;
    top: 3px;
    left: 6px;
}
.msg.msg-success {
    color: #4ab933;
}
.msg.msg-success > .msg-con {
    border: 1px solid #dcf9d6;
    background-color: #edffe9;
}
.msg.msg-warning {
    color: #cf700b;
}
.msg.msg-warning > .msg-con {
    border: 1px solid #fee8d7;
    background-color: #fef1e3;
}
.msg.msg-notice {
    color: #ee9f28;
}
.msg.msg-notice > .msg-con {
    border: 1px solid #faf1d7;
    background-color: #fffff1;
}
.msg.msg-tips {
    color: #ee9f28;
}
.msg.msg-tips > .msg-con {
    border: 1px solid #faf1d7;
    background-color: #fffff1;
}
.msg.msg-info {
    color: #3a9ed5;
}
.msg.msg-info > .msg-con {
    border: 1px solid #e4f3fd;
    background-color: #f2faff;
}
.msg.msg-question {
    color: #333;
}
.msg.msg-question > .msg-con {
    border: 1px solid #eaeaea;
    background-color: #f7f7f7;
}
.msg.msg-clear {
    display: block;
}
.msg.msg-clear > .msg-con {
    display: inline-block;
}
.msg.msg-block {
    display: block;
    margin-bottom: 18px;
}
.msg.msg-block {
    display: block;
    margin-bottom: 18px;
}
.msg.msg-large {
    font-size: 14px;
    line-height: 22px;
    font-weight: bold;
}

/*消息END*/




.steps-round {
    font-size: 0px;
    overflow: hidden;
    line-height: 0px;
    margin: 18px 0px;
    padding: 0px 6px;
}
.steps-round > div {
    display: inline-block;
    vertical-align: top;
    position: relative;
}
.steps-round > div .wrap:before, .steps-round > div .wrap:after {
    display: table;
    content: "";
    line-height: 0;
}
.steps-round > .finished .round {
    border: 4px #1890ff solid;
    background-color: #1890ff;
    color: #ffffff;
}
.steps-round > div .round {
    width: 32px;
    height: 32px;
    -webkit-border-radius: 32px;
    -moz-border-radius: 32px;
    border-radius: 32px;
    display: inline-block;
    vertical-align: middle;
    font-size: 12px;
    color: #FFF;
    line-height: 22px;
    text-align: center;
    float: left;
}
.steps-round > .finished .bar {
    background-color: #1890ff;
}
.steps-round > div .bar {
    margin: 10px 10px 0px 40px;
    width: 200px;
    height: 6px;
    vertical-align: middle;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
}
.steps-round > div .wrap:after {
    clear: both;
}
.steps-round > div:first-child > label {
    width: auto;
    max-width: 50%;
    margin-left: 0;
    left: 0;
}
.steps-round > div > label {
    display: inline-block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 12px;
    line-height: 12px;
    height: 12px;
    margin-top: 6px;
    color: #28a3ef;
    cursor: default;
    text-align: center;
    width: 50%;
    margin-left: -25%;
    position: relative;
    left: 15px;
}
.steps-round > .current .round {
    border: 4px #1890ff solid;
    background-color: #1890ff;
}
.steps-round > .current .bar {
    background-color: #1890ff;
}
.steps-round > .todo > label {
    color: #999999;
}
.steps-round > .todo .round {
    border: 4px #d3d3d3 solid;
    background-color: #FFF;
    color: #999999;
}
.steps-round > .todo .bar {
    background-color: #eeeeee;
}
.steps-round > div:last-child, .steps-round > div.last {
    width: 30px !important;
}
.steps-round > div:last-child > label, .steps-round > div.last > label {
    position: absolute;
    width: auto;
    margin-left: 0;
    left: auto;
    right: 0;
}
.steps-round-auto {
    display: table;
    width: 100%;
}
.steps-round-auto > div {
    display: table-cell;
}
.steps-round-auto > div .bar {
    width: auto;
}
.steps-3 > div {
    width: 50%;
}
.steps-4 > div {
    width: 33%;
}
.steps-5 > div {
    width: 25%;
}
.steps-6 > div {
    width: 20%;
}
.steps-7 > div {
    width: 16%;
}
/*步骤条END*/



.btn {
    display: inline-block;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    border: 1px solid transparent;
    padding: 0px 15px;
    font-size: 14px;
    border-radius: 4px;
    height:32px;
    line-height:32px;
    transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}
.btn .icon{
    margin-right: 8px
}
.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}
.btn-success{
color: #fff;
    background-color: #28a745;
    border-color: #28a745;
}
.btn-info{
color: #fff;
    background-color: #17a2b8;
    border-color: #17a2b8;
}
.btn-warning{
color: #fff;
    background-color: #ffc107;
    border-color: #ffc107;
}
.btn-danger{
color: #fff;
    background-color: #dc3545;
    border-color: #dc3545;    
}
/*按钮END*/







/*栅格*/
.show-grid:after, .show-grid:before {
    content: " ";
    display: table;
}
.show-grid:after {
    clear: both;
    visibility: hidden;
    font-size: 0;
    height: 0;
}
.col-1,.col-2,.col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-10,.col-11,.col-12{
    float: left;
    position: relative;
    min-height: 1px;
    padding-right: 15px;
    padding-left: 15px;
}
.col-1 {
    width: 8.33333333%;
}
.col-2 {
    width: 16.66666667%;
}
.col-3 {
    width: 25%;
}
.col-4 {
    width: 33.33333333%;
}
.col-5 {
    width: 41.66666667%;
}
.col-6 {
    width: 50%;
}
.col-7 {
    width: 58.33333333%;
}
.col-8 {
    width: 66.66666667%;
}
.col-9 {
    width: 75%;
}
.col-10 {
    width: 83.33333333%;
}
.col-11 {
    width: 91.66666667%;
}
.col-12 {
    width: 100%;
}
/*栅格 END*/



/*弹出层*/
.modal-open {
  overflow: hidden;
}
.modal {
  display: none;
  overflow: hidden;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1050;
  -webkit-overflow-scrolling: touch;
  outline: 0;
}
.modal.fade .modal-dialog {
  -webkit-transform: translate(0, -25%);
  -ms-transform: translate(0, -25%);
  -o-transform: translate(0, -25%);
  transform: translate(0, -25%);
  -webkit-transition: -webkit-transform 0.3s ease-out;
  -o-transition: -o-transform 0.3s ease-out;
  transition: transform 0.3s ease-out;
}
.modal.in .modal-dialog {
  -webkit-transform: translate(0, 0);
  -ms-transform: translate(0, 0);
  -o-transform: translate(0, 0);
  transform: translate(0, 0);
}
.modal-open .modal {
  overflow-x: hidden;
  overflow-y: auto;
}
.modal-dialog {
  position: relative;
  width: auto;
  margin: 10px;
}
.modal-content {
  position: relative;
  background-color: #ffffff;
  border: 1px solid #999999;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  -webkit-box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
  box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
  -webkit-background-clip: padding-box;
          background-clip: padding-box;
  outline: 0;
}
.modal-backdrop {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1040;
  background-color: #000000;
}
.modal-backdrop.fade {
  opacity: 0;
  filter: alpha(opacity=0);
}
.modal-backdrop.in {
  opacity: 0.5;
  filter: alpha(opacity=50);
}
.modal-header {
  padding: 15px;
  border-bottom: 1px solid #e5e5e5;
}
.modal-header .close {
  margin-top: -2px;
}
.modal-title {
  margin: 0;
  line-height: 1.42857143;
  font-size: 18px
}
.modal-body {
  position: relative;
  padding: 15px;
}
.modal-footer {
  padding: 15px;
  text-align: right;
  border-top: 1px solid #e5e5e5;
}
.modal-footer .btn + .btn {
  margin-left: 5px;
  margin-bottom: 0;
}
.modal-footer .btn-group .btn + .btn {
  margin-left: -1px;
}
.modal-footer .btn-block + .btn-block {
  margin-left: 0;
}
.modal-scrollbar-measure {
  position: absolute;
  top: -9999px;
  width: 50px;
  height: 50px;
  overflow: scroll;
}
.modal-dialog {
    width: 600px;
    margin: 60px auto;
}
.close {
    float: right;
    font-size: 21px;
    font-weight: 700;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    filter: alpha(opacity=20);
    opacity: .2;
}
button.close {
    -webkit-appearance: none;
    padding: 0;
    cursor: pointer;
    background: 0 0;
    border: 0;
}

/*弹出层 END*/


/*选项卡*/
.tabs {
  margin-bottom: 0;
  padding-left: 0;
  list-style: none;
}
.tabs > li {
  position: relative;
  display: block;
}
.tabs > li > a {
  position: relative;
  display: block;
  padding: 8px 20px;
  color: #666
}
.tabs {
  border-bottom: 1px solid #dddddd;
  margin-bottom: 16px;
}
.tabs > li {
  float: left;
  margin-bottom: -1px;
  margin-right: 24px;
}
.tabs > li > a {
  line-height: 1.42857143;
  border: 1px solid transparent;
}
.tabs > li.active > a,
.tabs > li.active > a:hover,
.tabs > li.active > a:focus {
  color: #007bff;
  border: 1px solid transparent;
  border-bottom-color: #007bff;
  cursor: default;
}
.tabs > li > a:hover{
  color: #007bff;
  -webkit-transition: color .3s cubic-bezier(.645,.045,.355,1);
  transition: color .3s cubic-bezier(.645,.045,.355,1);
}
.tab-content > .tab-pane {
  display: none;
  clear: both;
}
.tab-content > .active {
  display: block;
}
.tabs:before,
.tabs:after,
.tabs-header:before,
.tabs-header:after,
.tabs-collapse:before,
.tabs-collapse:after {
  content: " ";
  display: table;
  clear: both;
}


/* Accordion 折叠面板*/
.accordion{
    border: 1px solid #e2e2e2;
    overflow: hidden;
    border-radius: 4px 
}
.accordion.colla{
    border:none;
}
.accordion.colla .accordion-item{
    border: 1px solid #e2e2e2;
    margin-bottom:6px;
}
.accordion.colla .accordion-item:first-child {
    border-top: 1px solid #e2e2e2;
}
.accordion .accordion-item{
    border-top: 1px solid #e2e2e2;
}
.accordion .accordion-item:first-child {
    border-top: none;
}
.accordion .accordion-title{
    position:relative;
    color: #333;
    background-color: #f2f2f2;
    cursor: pointer;
    padding: 12px 40px 12px 12px;
    font-size: 14px;
}
.accordion .accordion-title i{
    content:'';
    width: 0;
    height: 0;
    border-width: 6px;
    overflow: hidden;
    cursor: pointer;
    transition: all .5s; 
    -webkit-transition: all .5s;
    border-style: dashed dashed solid;
    border-color: transparent transparent #c2c2c2;
    position: absolute;  
    top: 50%;
    right: 15px;
    margin-top: -8px;
}
.accordion .accordion-title:hover{
    text-decoration: none;
    background-color: #f2f2f2;
}
.accordion .accordion-title.current{
    background-color: #f2f2f2;
    color:#007bff;
}
.accordion .accordion-title.current i{
    border-style: solid dashed dashed;
    border-color: #c2c2c2 transparent transparent;
    margin-top: -3px;
}
.accordion .accordion-content{
    display: none;
    border-top: 1px solid #e2e2e2;
    color: #666;
    padding:15px;
}
/* Accordion 折叠面板END*/



.tooltip {
  position: absolute;
  z-index: 1070;
  display: block;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-style: normal;
  font-weight: normal;
  letter-spacing: normal;
  line-break: auto;
  line-height: 1.42857143;
  text-align: left;
  text-align: start;
  text-decoration: none;
  text-shadow: none;
  text-transform: none;
  white-space: normal;
  word-break: normal;
  word-spacing: normal;
  word-wrap: normal;
  font-size: 12px;
  opacity: 0;
  filter: alpha(opacity=0);
}
.tooltip.in {
  opacity: 0.9;
  filter: alpha(opacity=90);
}
.tooltip.top {
  margin-top: -3px;
  padding: 5px 0;
}
.tooltip.right {
  margin-left: 3px;
  padding: 0 5px;
}
.tooltip.bottom {
  margin-top: 3px;
  padding: 5px 0;
}
.tooltip.left {
  margin-left: -3px;
  padding: 0 5px;
}
.tooltip-inner {
  max-width: 200px;
  padding: 3px 8px;
  color: #ffffff;
  text-align: center;
  background-color: #000000;
  border-radius: 4px;
}
.tooltip-arrow {
  position: absolute;
  width: 0;
  height: 0;
  border-color: transparent;
  border-style: solid;
}
.tooltip.top .tooltip-arrow {
  bottom: 0;
  left: 50%;
  margin-left: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000000;
}
.tooltip.top-left .tooltip-arrow {
  bottom: 0;
  right: 5px;
  margin-bottom: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000000;
}
.tooltip.top-right .tooltip-arrow {
  bottom: 0;
  left: 5px;
  margin-bottom: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000000;
}
.tooltip.right .tooltip-arrow {
  top: 50%;
  left: 0;
  margin-top: -5px;
  border-width: 5px 5px 5px 0;
  border-right-color: #000000;
}
.tooltip.left .tooltip-arrow {
  top: 50%;
  right: 0;
  margin-top: -5px;
  border-width: 5px 0 5px 5px;
  border-left-color: #000000;
}
.tooltip.bottom .tooltip-arrow {
  top: 0;
  left: 50%;
  margin-left: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000000;
}
.tooltip.bottom-left .tooltip-arrow {
  top: 0;
  right: 5px;
  margin-top: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000000;
}
.tooltip.bottom-right .tooltip-arrow {
  top: 0;
  left: 5px;
  margin-top: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000000;
}
/*文字提示 END*/