/*!
 * built with boostrap3 
 * @navbar-height: 30px
 * @nav-link-padding: 7px
 */

pre {
    word-break: normal;
    word-wrap: normal;
    position: relative
}

code {
    white-space: pre-line;
    word-wrap: break-word
}

i {
    margin-right: 4px;
    display: inline-block;
    vertical-align: -4%
}

h2:first-child {
    margin-top: 0
}

h1 {
    padding-top: 45px;
    margin-bottom: 35px
}

h1 i {
    margin-right: 7px
}

h3 {
    margin-bottom: 11px
}

blockquote p {
    font-size: 14.5px!important;
    line-height: 1.3!important
}

.image-cover-box {
    position: relative
}

.image-cover {
    position: absolute;
    left: 0;
    text-align: center;
    color: #eee;
    font-size: 25px;
    font-weight: bold
}

.image-cover i {
    margin-left: 7px
}

.footnote li p {
    margin-bottom: 0;
    display: inline-block
}

.niu2-header-anchor {
    margin-left: 5px;
    font-size: 85%;
    visibility: hidden;
    color: #bbb
}

.niu2-header-anchor:hover {
    color: #333;
    text-decoration: none
}

#niu2-main-content h1:hover .niu2-header-anchor,
#niu2-main-content h2:hover .niu2-header-anchor,
#niu2-main-content h3:hover .niu2-header-anchor,
#niu2-main-content h4:hover .niu2-header-anchor,
#niu2-main-content h5:hover .niu2-header-anchor,
#niu2-main-content h6:hover .niu2-header-anchor {
    visibility: visible
}

#niu2-toolbar {
    position: fixed;
    top: 30%;
    left: -36px
}

#niu2-toolbar-viewsource {
    padding-left: 2px
}

#niu2-toolbar a {
    color: #666
}

#niu2-toolbar a:hover {
    color: #428bca;
    text-decoration: none
}

#content-comments {
    margin-top: 25px;
    padding-top: 20px
}

sup {
    margin: 0 3px 0 2px
}

.niu2-sidebar-tag sup {
    font-style: italic
}

sup a.footnote-ref:before {
    content: "[";
    margin-right: 1px
}

sup a.footnote-ref:after {
    content: "]";
    margin-left: 1px
}

sup a.footnote-ref:hover {
    text-decoration: none
}

div.footnote hr {
    margin-bottom: 10px
}

div.footnote li {
    margin-top: 2px
}

div.footnote span {
    line-height: 1.2
}

div.footnote p {
    display: inline
}

.activeSubBackref {
    text-decoration: underline
}

a.activeSubBackref:hover {
    text-decoration: underline!important
}

.backref-span {
    vertical-align: super
}

a.footnote-backref:hover {
    text-decoration: none
}

div.popover {
    line-height: 1.6;
    max-width: 320px;
    background-color: white;
    color: black
}

.alert-info a {
    font-weight: bold
}

.navbar {
    -webkit-backface-visibility: hidden
}

#niu2-main-content ul ul,
#niu2-main-content ol ul,
#niu2-main-content ul ol,
#niu2-main-content ol ol {
    margin-bottom: 5px
}

.navbar ul,
.navbar ol {
    line-height: 1.42!important
}

p,
#niu2-main-content ul,
#niu2-main-content ol {
    line-height: 1.7
}

.footnote ul,
.footnote ol,
.footnote p {
    line-height: 1.6!important
}

hr {
    border-top: 1px solid #ccc
}

img {
    max-width: 100%
}

.with-right-border {
    border-right: 1px solid #ccc
}

.niu2-right-container {
    padding-left: 16px
}

a.niu2-active-toc,
a.niu2-active-toc:hover {
    color: white;
    background-color: #428bca;
    display: inline-block;
    text-decoration: none
}

.niu2-sidebar-tag {
    margin-bottom: 4px;
    display: inline-block;
    margin-right: -16px;
    white-space: nowrap
}

.niu2-sidebar-label:first-child {
    margin-top: 0!important
}

.niu2-sidebar-label {
    margin-top: 10px;
    margin-bottom: 4px;
    font-size: 15px
}

.niu2-sidebar-inter-value {
    margin-left: 20px
}

.niu2-sidebar-value {
    margin-left: 20px
}

.niu2-sidebar-value ul {
    padding-left: 0;
    list-style: none
}

#niu2-sidebar-toc-ctrl:hover {
    cursor: pointer
}

.niu2-sidebar-toc-index {
    float: left;
    text-align: right;
    width: 35px
}

#niu2-sidebar-toc {
    margin-top: 10px!important;
    min-width: 210px!important
}

#niu2-sidebar-toc-list {
    padding-left: 0;
    margin-left: -4px;
    overflow-x: hidden;
    overflow-y: auto;
    line-height: 1.6
}

#niu2-sidebar-toc-list li ol {
    margin-left: -3px
}

#niu2-sidebar-toc-list li ol li ol,
#niu2-sidebar-toc-list li ul li ul {
    margin-left: -2px
}

#niu2-sidebar-toc-list a {
    padding: 0 3px;
    margin-left: 3px;
    display: inline-block;
    max-width: 70%;
    text-overflow: ellipsis;
    -o-text-overflow: ellipsis;
    overflow: hidden;
    vertical-align: top;
    white-space: nowrap
}

#niu2-sidebar-toc-list li li a {
    max-width: 68%
}

#niu2-sidebar-toc-list li li li a {
    max-width: 68%;
    margin-left: 6px
}

#niu2-sidebar-toc-list li ol,
#niu2-sidebar-toc-list li ul {
    display: none
}

#niu2-sidebar-toc-list ol li,
#niu2-sidebar-toc-list ul li {
    display: none;
    position: relative;
    left: 1em;
    list-style-position: outside
}

#niu2-sidebar-toc-list li {
    margin-left: -20px;
    margin-top: 4px;
    list-style: none
}

#niu2-sidebar-toc-list>li {
    margin-left: -15px
}

.niu2-sidebar-toc-fixed {
    width: inherit;
    position: fixed;
    top: 50px!important
}

.niu2-top-icon-hidden {
    display: none
}

.niu2-top-icon:hover {
    display: inline
}

.niu2-404-info-bigger {
    margin-top: 30px;
    font-size: 100px;
    text-align: center
}

.niu2-404-info {
    font-size: 50px;
    text-align: center
}

#niu2-cse-wrapper {
    margin-right: 20px
}

#niu2-cse-header-box {
    position: absolute;
    margin-top: 3.5px;
    margin-left: -172px
}

#niu2-cse-search-input {
    width: 150px;
    height: 21px;
    padding: 1px 3px;
    margin-top: 1px
}

#niu2-cse-ctrl-box {
    color: #999;
    margin-top: 6px;
    cursor: pointer
}

#niu2-cse-search-image {
    margin: 2px 3px 0 5px
}

.niu2-clearfix {
    height: 0
}

.niu2-meta {
    margin-bottom: 35px
}

.niu2-meta a,
.niu2-meta-index a {
    color: #333
}

.niu2-meta-tag {
    padding-left: 10px
}

.niu2-meta-tag a,
.niu2-meta-tag-index a {
    margin-right: 6px;
    display: inline-block
}

.niu2-meta-category-index,
.niu2-meta-tag-index {
    margin-right: 10px
}

.niu2-meta-index {
    margin: 8px 0
}

.niu2-meta-date-index {
    font-size: 14px;
    margin-right: 10px
}

.niu2-index-title {
    margin-bottom: 20px
}

.niu2-index-article {
    margin-bottom: 20px
}

.niu2-index-article-title {
    font-size: 25px
}

.niu2-footer {
    clear: both
}

.niu2-footer hr {
    margin: 8px 0
}

.niu2-footer p {
    padding: 0;
    margin: 5px 0;
    line-height: 1.42!important
}

.niu2-footer-link {
    margin: 0 2px
}

.niu2-footer-icon {
    margin: 0 2px
}

.tagcloud-list {
    line-height: 1.5
}

.niu2-button {
    margin-left: 5px
}

.niu2-icons a {
    text-decoration: none
}

.niu2-category-list {
    padding-left: 5px
}

.niu2-category-list li {
    list-style: none
}

a.niu2-toggle-ctrl {
    height: 28px;
    font-size: 18px;
    padding-left: 5px;
    cursor: pointer;
    display: block;
    color: #333;
    width: 100%;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    margin-bottom: 3px
}

a.niu2-toggle-ctrl:hover {
    text-decoration: none;
    color: white;
    background-color: #428bca
}

#niu2-archives {
    font-size: 15px;
    line-height: 1.7
}

#niu2-archives .panel {
    box-shadow: none;
    margin-bottom: 10px
}

#niu2-archives ul {
    margin-bottom: 4px;
    padding-left: 25px
}

#niu2-archives li {
    list-style: none
}

#niu2-archives li span {
    margin-right: 10px
}

#niu2-tagcloud {
    margin-top: 15px
}

#niu2-tagcloud-filter-input {
    width: 40%
}

#niu2-tagcloud ul {
    padding: 0
}

#niu2-tagcloud a {
    display: inline-block;
    padding: 0 3px
}

#niu2-tagcloud a:hover {
    text-decoration: none;
    color: white;
    background-color: #428bca
}

#niu2-tagcloud li {
    display: inline
}

#niu2-tagcloud li,
.dropdown-toc li {
    list-style: none
}

.dropdown-toc a {
    padding: 3px 0 5px 5px;
    color: #333;
    display: list-item
}

.dropdown-toc a:hover {
    color: white;
    background-color: #428bca;
    text-decoration: none
}

.dropdown-toc .dropdown-menu {
    max-height: 500px;
    overflow: auto
}

.dropdown-toc>ul {
    min-width: 200px
}

.dropdown-toc>.dropdown-menu ul {
    padding-left: 10px
}

.dropdown-toc>.dropdown-menu>li>a {
    padding-left: 10px
}

.niu2-content {
    padding-top: 30px
}

h1:before,
h2:before,
h3:before,
h4:before,
h5:before,
h6:before {
    display: block;
    content: "";
    height: 45px;
    margin: -45px 0 0
}

#niu2-loading-overly {
    position: fixed;
    top: 0;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: .9;
    z-index: 9999
}

#niu2-loading-icon {
    position: relative;
    top: 43%;
    left: 45%;
    color: #fff
}

@-webkit-keyframes anim-rotate {
    0% {
        -webkit-transform: rotate(0deg)
    }
    100% {
        -webkit-transform: rotate(360deg)
    }
}

@keyframes anim-rotate {
    0% {
        transform: rotate(0deg)
    }
    100% {
        transform: rotate(360deg)
    }
}

.icon-spin {
    -webkit-animation: anim-rotate 2s infinite linear;
    animation: anim-rotate 2s infinite linear
}

.icon-lg {
    font-size: 1.33333333em;
    line-height: .75em;
    vertical-align: -15%
}

.icon-2x {
    font-size: 2em
}

.icon-3x {
    font-size: 3em
}

.icon-4x {
    font-size: 4em
}

.icon-5x {
    font-size: 5em
}

@media(max-width:1000px) {
    #niu2-sidebar-toc {
        display: none!important
    }
}

@media(max-width:767px) {
    #niu2-cse-wrapper {
        margin-right: 20px;
        padding-bottom: 10px;
        width: 140px
    }
    #niu2-cse-header-box {
        position: relative;
        margin-top: 2.5px;
        margin-left: -8px
    }
    #niu2-cse-search-input {
        width: 150px;
        position: absolute;
        margin-left: -3px;
        margin-top: -12px
    }
    #niu2-cse-ctrl-box {
        color: #999;
        position: absolute;
        margin-top: -20px;
        margin-left: 3px
    }
    #niu2-cse-search-text {
        display: none
    }
}