更改BootStrap popover的默认样式

 .popover {
     position: absolute;
     top: 0;
     left: 0;
     z-index: 1060;
     display: none;
     max-width: 276px;
     padding: 1px;
     font-size: 14px;
     font-weight: 400;
     line-height: 1.42857143;
     text-align: left;
     white-space: normal;
     background-color: #fff;
     -webkit-background-clip: padding-box;
     background-clip: padding-box;
     border: 1px solid #ccc;
     border: 1px solid rgba(0,0,0,.2);
     border-radius: 6px;
     -webkit-box-shadow: 0 5px 10px rgba(0,0,0,.2);
     box-shadow: 0 5px 10px rgba(0,0,0,.2);
 }

BootStrap popover弹出框默认样式，需修改弹出框样式可在CSS中自定义要修改的样式，例如：padding改为6px，背景颜色修改为黑色，字体颜色修改为白色

 .popover{
     padding:6px;
     background-color:#000;
     color:#fff;
 }