@charset "UTF-8";
/*!
 *  Font Awesome 4.6.3 by @davegandy - http://fontawesome.io - @fontawesome
 *  License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
 */
/* FONT PATH
 * -------------------------- */
@font-face {
  font-family: 'FontAwesome';
  src: url("./gitbook/fonts/fontawesome/fontawesome-webfont.eot?v=4.6.3");
  src: url("./gitbook/fonts/fontawesome/fontawesome-webfont.eot?#iefix&v=4.6.3") format("embedded-opentype"), url("./gitbook/fonts/fontawesome/fontawesome-webfont.woff2?v=4.6.3") format("woff2"), url("./gitbook/fonts/fontawesome/fontawesome-webfont.woff?v=4.6.3") format("woff"), url("./gitbook/fonts/fontawesome/fontawesome-webfont.ttf?v=4.6.3") format("truetype"), url("./gitbook/fonts/fontawesome/fontawesome-webfont.svg?v=4.6.3#fontawesomeregular") format("svg");
  font-weight: normal;
  font-style: normal; }

.fa {
  display: inline-block;
  font: normal normal normal 14px/1 FontAwesome;
  font-size: inherit;
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale; }

/* makes the font 33% larger relative to the icon container */
.fa-lg {
  font-size: 1.33333em;
  line-height: 0.75em;
  vertical-align: -15%; }

.fa-2x {
  font-size: 2em; }

.fa-3x {
  font-size: 3em; }

.fa-4x {
  font-size: 4em; }

.fa-5x {
  font-size: 5em; }

.fa-fw {
  width: 1.28571em;
  text-align: center; }

.fa-ul {
  padding-left: 0;
  margin-left: 2.14286em;
  list-style-type: none; }
  .fa-ul > li {
    position: relative; }

.fa-li {
  position: absolute;
  left: -2.14286em;
  width: 2.14286em;
  top: 0.14286em;
  text-align: center; }
  .fa-li.fa-lg {
    left: -1.85714em; }

.fa-border {
  padding: .2em .25em .15em;
  border: solid 0.08em #eee;
  border-radius: .1em; }

.fa-pull-left {
  float: left; }

.fa-pull-right {
  float: right; }

.fa.fa-pull-left {
  margin-right: .3em; }

.fa.fa-pull-right {
  margin-left: .3em; }

/* Deprecated as of 4.4.0 */
.pull-right {
  float: right; }

.pull-left {
  float: left; }

.fa.pull-left {
  margin-right: .3em; }

.fa.pull-right {
  margin-left: .3em; }

.fa-spin {
  -webkit-animation: fa-spin 2s infinite linear;
  animation: fa-spin 2s infinite linear; }

.fa-pulse {
  -webkit-animation: fa-spin 1s infinite steps(8);
  animation: fa-spin 1s infinite steps(8); }

@-webkit-keyframes fa-spin {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg); }
  100% {
    -webkit-transform: rotate(359deg);
    transform: rotate(359deg); } }

@keyframes fa-spin {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg); }
  100% {
    -webkit-transform: rotate(359deg);
    transform: rotate(359deg); } }

.fa-rotate-90 {
  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=1)";
  -webkit-transform: rotate(90deg);
  -ms-transform: rotate(90deg);
  transform: rotate(90deg); }

.fa-rotate-180 {
  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=2)";
  -webkit-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  transform: rotate(180deg); }

.fa-rotate-270 {
  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=3)";
  -webkit-transform: rotate(270deg);
  -ms-transform: rotate(270deg);
  transform: rotate(270deg); }

.fa-flip-horizontal {
  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=0, mirror=1)";
  -webkit-transform: scale(-1, 1);
  -ms-transform: scale(-1, 1);
  transform: scale(-1, 1); }

.fa-flip-vertical {
  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=2, mirror=1)";
  -webkit-transform: scale(1, -1);
  -ms-transform: scale(1, -1);
  transform: scale(1, -1); }

:root .fa-rotate-90,
:root .fa-rotate-180,
:root .fa-rotate-270,
:root .fa-flip-horizontal,
:root .fa-flip-vertical {
  filter: none; }

.fa-stack {
  position: relative;
  display: inline-block;
  width: 2em;
  height: 2em;
  line-height: 2em;
  vertical-align: middle; }

.fa-stack-1x, .fa-stack-2x {
  position: absolute;
  left: 0;
  width: 100%;
  text-align: center; }

.fa-stack-1x {
  line-height: inherit; }

.fa-stack-2x {
  font-size: 2em; }

.fa-inverse {
  color: #fff; }

/* Font Awesome uses the Unicode Private Use Area (PUA) to ensure screen
   readers do not read off random characters that represent icons */
.fa-glass:before {
  content: ""; }

.fa-music:before {
  content: ""; }

.fa-search:before {
  content: ""; }

.fa-envelope-o:before {
  content: ""; }

.fa-heart:before {
  content: ""; }

.fa-star:before {
  content: ""; }

.fa-star-o:before {
  content: ""; }

.fa-user:before {
  content: ""; }

.fa-film:before {
  content: ""; }

.fa-th-large:before {
  content: ""; }

.fa-th:before {
  content: ""; }

.fa-th-list:before {
  content: ""; }

.fa-check:before {
  content: ""; }

.fa-remove:before,
.fa-close:before,
.fa-times:before {
  content: ""; }

.fa-search-plus:before {
  content: ""; }

.fa-search-minus:before {
  content: ""; }

.fa-power-off:before {
  content: ""; }

.fa-signal:before {
  content: ""; }

.fa-gear:before,
.fa-cog:before {
  content: ""; }

.fa-trash-o:before {
  content: ""; }

.fa-home:before {
  content: ""; }

.fa-file-o:before {
  content: ""; }

.fa-clock-o:before {
  content: ""; }

.fa-road:before {
  content: ""; }

.fa-download:before {
  content: ""; }

.fa-arrow-circle-o-down:before {
  content: ""; }

.fa-arrow-circle-o-up:before {
  content: ""; }

.fa-inbox:before {
  content: ""; }

.fa-play-circle-o:before {
  content: ""; }

.fa-rotate-right:before,
.fa-repeat:before {
  content: ""; }

.fa-refresh:before {
  content: ""; }

.fa-list-alt:before {
  content: ""; }

.fa-lock:before {
  content: ""; }

.fa-flag:before {
  content: ""; }

.fa-headphones:before {
  content: ""; }

.fa-volume-off:before {
  content: ""; }

.fa-volume-down:before {
  content: ""; }

.fa-volume-up:before {
  content: ""; }

.fa-qrcode:before {
  content: ""; }

.fa-barcode:before {
  content: ""; }

.fa-tag:before {
  content: ""; }

.fa-tags:before {
  content: ""; }

.fa-book:before {
  content: ""; }

.fa-bookmark:before {
  content: ""; }

.fa-print:before {
  content: ""; }

.fa-camera:before {
  content: ""; }

.fa-font:before {
  content: ""; }

.fa-bold:before {
  content: ""; }

.fa-italic:before {
  content: ""; }

.fa-text-height:before {
  content: ""; }

.fa-text-width:before {
  content: ""; }

.fa-align-left:before {
  content: ""; }

.fa-align-center:before {
  content: ""; }

.fa-align-right:before {
  content: ""; }

.fa-align-justify:before {
  content: ""; }

.fa-list:before {
  content: ""; }

.fa-dedent:before,
.fa-outdent:before {
  content: ""; }

.fa-indent:before {
  content: ""; }

.fa-video-camera:before {
  content: ""; }

.fa-photo:before,
.fa-image:before,
.fa-picture-o:before {
  content: ""; }

.fa-pencil:before {
  content: ""; }

.fa-map-marker:before {
  content: ""; }

.fa-adjust:before {
  content: ""; }

.fa-tint:before {
  content: ""; }

.fa-edit:before,
.fa-pencil-square-o:before {
  content: ""; }

.fa-share-square-o:before {
  content: ""; }

.fa-check-square-o:before {
  content: ""; }

.fa-arrows:before {
  content: ""; }

.fa-step-backward:before {
  content: ""; }

.fa-fast-backward:before {
  content: ""; }

.fa-backward:before {
  content: ""; }

.fa-play:before {
  content: ""; }

.fa-pause:before {
  content: ""; }

.fa-stop:before {
  content: ""; }

.fa-forward:before {
  content: ""; }

.fa-fast-forward:before {
  content: ""; }

.fa-step-forward:before {
  content: ""; }

.fa-eject:before {
  content: ""; }

.fa-chevron-left:before {
  content: ""; }

.fa-chevron-right:before {
  content: ""; }

.fa-plus-circle:before {
  content: ""; }

.fa-minus-circle:before {
  content: ""; }

.fa-times-circle:before {
  content: ""; }

.fa-check-circle:before {
  content: ""; }

.fa-question-circle:before {
  content: ""; }

.fa-info-circle:before {
  content: ""; }

.fa-crosshairs:before {
  content: ""; }

.fa-times-circle-o:before {
  content: ""; }

.fa-check-circle-o:before {
  content: ""; }

.fa-ban:before {
  content: ""; }

.fa-arrow-left:before {
  content: ""; }

.fa-arrow-right:before {
  content: ""; }

.fa-arrow-up:before {
  content: ""; }

.fa-arrow-down:before {
  content: ""; }

.fa-mail-forward:before,
.fa-share:before {
  content: ""; }

.fa-expand:before {
  content: ""; }

.fa-compress:before {
  content: ""; }

.fa-plus:before {
  content: ""; }

.fa-minus:before {
  content: ""; }

.fa-asterisk:before {
  content: ""; }

.fa-exclamation-circle:before {
  content: ""; }

.fa-gift:before {
  content: ""; }

.fa-leaf:before {
  content: ""; }

.fa-fire:before {
  content: ""; }

.fa-eye:before {
  content: ""; }

.fa-eye-slash:before {
  content: ""; }

.fa-warning:before,
.fa-exclamation-triangle:before {
  content: ""; }

.fa-plane:before {
  content: ""; }

.fa-calendar:before {
  content: ""; }

.fa-random:before {
  content: ""; }

.fa-comment:before {
  content: ""; }

.fa-magnet:before {
  content: ""; }

.fa-chevron-up:before {
  content: ""; }

.fa-chevron-down:before {
  content: ""; }

.fa-retweet:before {
  content: ""; }

.fa-shopping-cart:before {
  content: ""; }

.fa-folder:before {
  content: ""; }

.fa-folder-open:before {
  content: ""; }

.fa-arrows-v:before {
  content: ""; }

.fa-arrows-h:before {
  content: ""; }

.fa-bar-chart-o:before,
.fa-bar-chart:before {
  content: ""; }

.fa-twitter-square:before {
  content: ""; }

.fa-facebook-square:before {
  content: ""; }

.fa-camera-retro:before {
  content: ""; }

.fa-key:before {
  content: ""; }

.fa-gears:before,
.fa-cogs:before {
  content: ""; }

.fa-comments:before {
  content: ""; }

.fa-thumbs-o-up:before {
  content: ""; }

.fa-thumbs-o-down:before {
  content: ""; }

.fa-star-half:before {
  content: ""; }

.fa-heart-o:before {
  content: ""; }

.fa-sign-out:before {
  content: ""; }

.fa-linkedin-square:before {
  content: ""; }

.fa-thumb-tack:before {
  content: ""; }

.fa-external-link:before {
  content: ""; }

.fa-sign-in:before {
  content: ""; }

.fa-trophy:before {
  content: ""; }

.fa-github-square:before {
  content: ""; }

.fa-upload:before {
  content: ""; }

.fa-lemon-o:before {
  content: ""; }

.fa-phone:before {
  content: ""; }

.fa-square-o:before {
  content: ""; }

.fa-bookmark-o:before {
  content: ""; }

.fa-phone-square:before {
  content: ""; }

.fa-twitter:before {
  content: ""; }

.fa-facebook-f:before,
.fa-facebook:before {
  content: ""; }

.fa-github:before {
  content: ""; }

.fa-unlock:before {
  content: ""; }

.fa-credit-card:before {
  content: ""; }

.fa-feed:before,
.fa-rss:before {
  content: ""; }

.fa-hdd-o:before {
  content: ""; }

.fa-bullhorn:before {
  content: ""; }

.fa-bell:before {
  content: ""; }

.fa-certificate:before {
  content: ""; }

.fa-hand-o-right:before {
  content: ""; }

.fa-hand-o-left:before {
  content: ""; }

.fa-hand-o-up:before {
  content: ""; }

.fa-hand-o-down:before {
  content: ""; }

.fa-arrow-circle-left:before {
  content: ""; }

.fa-arrow-circle-right:before {
  content: ""; }

.fa-arrow-circle-up:before {
  content: ""; }

.fa-arrow-circle-down:before {
  content: ""; }

.fa-globe:before {
  content: ""; }

.fa-wrench:before {
  content: ""; }

.fa-tasks:before {
  content: ""; }

.fa-filter:before {
  content: ""; }

.fa-briefcase:before {
  content: ""; }

.fa-arrows-alt:before {
  content: ""; }

.fa-group:before,
.fa-users:before {
  content: ""; }

.fa-chain:before,
.fa-link:before {
  content: ""; }

.fa-cloud:before {
  content: ""; }

.fa-flask:before {
  content: ""; }

.fa-cut:before,
.fa-scissors:before {
  content: ""; }

.fa-copy:before,
.fa-files-o:before {
  content: ""; }

.fa-paperclip:before {
  content: ""; }

.fa-save:before,
.fa-floppy-o:before {
  content: ""; }

.fa-square:before {
  content: ""; }

.fa-navicon:before,
.fa-reorder:before,
.fa-bars:before {
  content: ""; }

.fa-list-ul:before {
  content: ""; }

.fa-list-ol:before {
  content: ""; }

.fa-strikethrough:before {
  content: ""; }

.fa-underline:before {
  content: ""; }

.fa-table:before {
  content: ""; }

.fa-magic:before {
  content: ""; }

.fa-truck:before {
  content: ""; }

.fa-pinterest:before {
  content: ""; }

.fa-pinterest-square:before {
  content: ""; }

.fa-google-plus-square:before {
  content: ""; }

.fa-google-plus:before {
  content: ""; }

.fa-money:before {
  content: ""; }

.fa-caret-down:before {
  content: ""; }

.fa-caret-up:before {
  content: ""; }

.fa-caret-left:before {
  content: ""; }

.fa-caret-right:before {
  content: ""; }

.fa-columns:before {
  content: ""; }

.fa-unsorted:before,
.fa-sort:before {
  content: ""; }

.fa-sort-down:before,
.fa-sort-desc:before {
  content: ""; }

.fa-sort-up:before,
.fa-sort-asc:before {
  content: ""; }

.fa-envelope:before {
  content: ""; }

.fa-linkedin:before {
  content: ""; }

.fa-rotate-left:before,
.fa-undo:before {
  content: ""; }

.fa-legal:before,
.fa-gavel:before {
  content: ""; }

.fa-dashboard:before,
.fa-tachometer:before {
  content: ""; }

.fa-comment-o:before {
  content: ""; }

.fa-comments-o:before {
  content: ""; }

.fa-flash:before,
.fa-bolt:before {
  content: ""; }

.fa-sitemap:before {
  content: ""; }

.fa-umbrella:before {
  content: ""; }

.fa-paste:before,
.fa-clipboard:before {
  content: ""; }

.fa-lightbulb-o:before {
  content: ""; }

.fa-exchange:before {
  content: ""; }

.fa-cloud-download:before {
  content: ""; }

.fa-cloud-upload:before {
  content: ""; }

.fa-user-md:before {
  content: ""; }

.fa-stethoscope:before {
  content: ""; }

.fa-suitcase:before {
  content: ""; }

.fa-bell-o:before {
  content: ""; }

.fa-coffee:before {
  content: ""; }

.fa-cutlery:before {
  content: ""; }

.fa-file-text-o:before {
  content: ""; }

.fa-building-o:before {
  content: ""; }

.fa-hospital-o:before {
  content: ""; }

.fa-ambulance:before {
  content: ""; }

.fa-medkit:before {
  content: ""; }

.fa-fighter-jet:before {
  content: ""; }

.fa-beer:before {
  content: ""; }

.fa-h-square:before {
  content: ""; }

.fa-plus-square:before {
  content: ""; }

.fa-angle-double-left:before {
  content: ""; }

.fa-angle-double-right:before {
  content: ""; }

.fa-angle-double-up:before {
  content: ""; }

.fa-angle-double-down:before {
  content: ""; }

.fa-angle-left:before {
  content: ""; }

.fa-angle-right:before {
  content: ""; }

.fa-angle-up:before {
  content: ""; }

.fa-angle-down:before {
  content: ""; }

.fa-desktop:before {
  content: ""; }

.fa-laptop:before {
  content: ""; }

.fa-tablet:before {
  content: ""; }

.fa-mobile-phone:before,
.fa-mobile:before {
  content: ""; }

.fa-circle-o:before {
  content: ""; }

.fa-quote-left:before {
  content: ""; }

.fa-quote-right:before {
  content: ""; }

.fa-spinner:before {
  content: ""; }

.fa-circle:before {
  content: ""; }

.fa-mail-reply:before,
.fa-reply:before {
  content: ""; }

.fa-github-alt:before {
  content: ""; }

.fa-folder-o:before {
  content: ""; }

.fa-folder-open-o:before {
  content: ""; }

.fa-smile-o:before {
  content: ""; }

.fa-frown-o:before {
  content: ""; }

.fa-meh-o:before {
  content: ""; }

.fa-gamepad:before {
  content: ""; }

.fa-keyboard-o:before {
  content: ""; }

.fa-flag-o:before {
  content: ""; }

.fa-flag-checkered:before {
  content: ""; }

.fa-terminal:before {
  content: ""; }

.fa-code:before {
  content: ""; }

.fa-mail-reply-all:before,
.fa-reply-all:before {
  content: ""; }

.fa-star-half-empty:before,
.fa-star-half-full:before,
.fa-star-half-o:before {
  content: ""; }

.fa-location-arrow:before {
  content: ""; }

.fa-crop:before {
  content: ""; }

.fa-code-fork:before {
  content: ""; }

.fa-unlink:before,
.fa-chain-broken:before {
  content: ""; }

.fa-question:before {
  content: ""; }

.fa-info:before {
  content: ""; }

.fa-exclamation:before {
  content: ""; }

.fa-superscript:before {
  content: ""; }

.fa-subscript:before {
  content: ""; }

.fa-eraser:before {
  content: ""; }

.fa-puzzle-piece:before {
  content: ""; }

.fa-microphone:before {
  content: ""; }

.fa-microphone-slash:before {
  content: ""; }

.fa-shield:before {
  content: ""; }

.fa-calendar-o:before {
  content: ""; }

.fa-fire-extinguisher:before {
  content: ""; }

.fa-rocket:before {
  content: ""; }

.fa-maxcdn:before {
  content: ""; }

.fa-chevron-circle-left:before {
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.fa-unlock-alt:before {
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.fa-bullseye:before {
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.fa-ellipsis-h:before {
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.fa-ellipsis-v:before {
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.fa-rss-square:before {
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.fa-play-circle:before {
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.fa-minus-square:before {
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.fa-minus-square-o:before {
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.fa-level-up:before {
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.fa-level-down:before {
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.fa-check-square:before {
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.fa-pencil-square:before {
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.fa-external-link-square:before {
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.fa-share-square:before {
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.fa-compass:before {
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.fa-toggle-down:before,
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.fa-euro:before,
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.fa-gbp:before {
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.fa-dollar:before,
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.fa-rupee:before,
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.fa-cny:before,
.fa-rmb:before,
.fa-yen:before,
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.fa-ruble:before,
.fa-rouble:before,
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.fa-won:before,
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.fa-bitcoin:before,
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.fa-file:before {
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.fa-file-text:before {
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.fa-sort-alpha-asc:before {
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.fa-sort-alpha-desc:before {
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.fa-sort-amount-asc:before {
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.fa-sort-amount-desc:before {
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.fa-sort-numeric-asc:before {
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.fa-sort-numeric-desc:before {
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.fa-thumbs-up:before {
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.fa-thumbs-down:before {
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.fa-youtube-square:before {
  content: ""; }

.fa-youtube:before {
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.fa-xing:before {
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.fa-xing-square:before {
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.fa-youtube-play:before {
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.fa-dropbox:before {
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.fa-stack-overflow:before {
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.fa-instagram:before {
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.fa-flickr:before {
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.fa-adn:before {
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.fa-bitbucket:before {
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.fa-bitbucket-square:before {
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.fa-tumblr:before {
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.fa-long-arrow-down:before {
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.fa-long-arrow-up:before {
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.fa-long-arrow-left:before {
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.fa-long-arrow-right:before {
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.fa-apple:before {
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.fa-windows:before {
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.fa-android:before {
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.fa-linux:before {
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.fa-dribbble:before {
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.fa-skype:before {
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.fa-foursquare:before {
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.fa-trello:before {
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.fa-female:before {
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.fa-male:before {
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.fa-gittip:before,
.fa-gratipay:before {
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.fa-sun-o:before {
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.fa-moon-o:before {
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.fa-archive:before {
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.fa-bug:before {
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.fa-vk:before {
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.fa-weibo:before {
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.fa-renren:before {
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.fa-pagelines:before {
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.fa-stack-exchange:before {
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.fa-arrow-circle-o-right:before {
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.fa-arrow-circle-o-left:before {
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.fa-toggle-left:before,
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.fa-dot-circle-o:before {
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.fa-wheelchair:before {
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.fa-vimeo-square:before {
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.fa-turkish-lira:before,
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.fa-plus-square-o:before {
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.fa-space-shuttle:before {
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.fa-slack:before {
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.fa-envelope-square:before {
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.fa-wordpress:before {
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.fa-openid:before {
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.fa-institution:before,
.fa-bank:before,
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.fa-mortar-board:before,
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.fa-yahoo:before {
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.fa-google:before {
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.fa-reddit:before {
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.fa-stumbleupon-circle:before {
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.fa-stumbleupon:before {
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.fa-delicious:before {
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.fa-digg:before {
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.fa-pied-piper-pp:before {
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.fa-drupal:before {
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.fa-joomla:before {
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.fa-language:before {
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.fa-fax:before {
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.fa-building:before {
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.fa-child:before {
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.fa-paw:before {
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.fa-spoon:before {
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.fa-cube:before {
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.fa-cubes:before {
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.fa-behance:before {
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.fa-behance-square:before {
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.fa-steam:before {
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.fa-steam-square:before {
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.fa-recycle:before {
  content: ""; }

.fa-automobile:before,
.fa-car:before {
  content: ""; }

.fa-cab:before,
.fa-taxi:before {
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.fa-tree:before {
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.fa-spotify:before {
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.fa-deviantart:before {
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.fa-soundcloud:before {
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.fa-database:before {
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.fa-file-pdf-o:before {
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.fa-file-word-o:before {
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.fa-file-excel-o:before {
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.fa-file-powerpoint-o:before {
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.fa-file-photo-o:before,
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.fa-file-image-o:before {
  content: ""; }

.fa-file-zip-o:before,
.fa-file-archive-o:before {
  content: ""; }

.fa-file-sound-o:before,
.fa-file-audio-o:before {
  content: ""; }

.fa-file-movie-o:before,
.fa-file-video-o:before {
  content: ""; }

.fa-file-code-o:before {
  content: ""; }

.fa-vine:before {
  content: ""; }

.fa-codepen:before {
  content: ""; }

.fa-jsfiddle:before {
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.fa-life-bouy:before,
.fa-life-buoy:before,
.fa-life-saver:before,
.fa-support:before,
.fa-life-ring:before {
  content: ""; }

.fa-circle-o-notch:before {
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.fa-ra:before,
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.fa-ge:before,
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.fa-git-square:before {
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.fa-git:before {
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.fa-y-combinator-square:before,
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.fa-tencent-weibo:before {
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.fa-qq:before {
  content: ""; }

.fa-wechat:before,
.fa-weixin:before {
  content: ""; }

.fa-send:before,
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.fa-send-o:before,
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.fa-history:before {
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.fa-circle-thin:before {
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.fa-header:before {
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.fa-sliders:before {
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.fa-share-alt:before {
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.fa-share-alt-square:before {
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.fa-bomb:before {
  content: ""; }

.fa-soccer-ball-o:before,
.fa-futbol-o:before {
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.fa-tty:before {
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.fa-binoculars:before {
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.fa-plug:before {
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.fa-slideshare:before {
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.fa-twitch:before {
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.fa-yelp:before {
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.fa-newspaper-o:before {
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.fa-wifi:before {
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.fa-calculator:before {
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.fa-paypal:before {
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.fa-google-wallet:before {
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.fa-cc-visa:before {
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.fa-cc-mastercard:before {
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.fa-cc-discover:before {
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.fa-cc-amex:before {
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.fa-cc-paypal:before {
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.fa-cc-stripe:before {
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.fa-bell-slash:before {
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.fa-bell-slash-o:before {
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.fa-trash:before {
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.fa-copyright:before {
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.fa-at:before {
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.fa-eyedropper:before {
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.fa-paint-brush:before {
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.fa-birthday-cake:before {
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.fa-area-chart:before {
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.fa-pie-chart:before {
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.fa-line-chart:before {
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.fa-lastfm:before {
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.fa-lastfm-square:before {
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.fa-toggle-on:before {
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.fa-bicycle:before {
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.fa-bus:before {
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.fa-ioxhost:before {
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.fa-angellist:before {
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.fa-shekel:before,
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.fa-connectdevelop:before {
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.fa-forumbee:before {
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.fa-leanpub:before {
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.fa-sellsy:before {
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.fa-shirtsinbulk:before {
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.fa-simplybuilt:before {
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.fa-skyatlas:before {
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.fa-cart-plus:before {
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.fa-cart-arrow-down:before {
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.fa-diamond:before {
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.fa-ship:before {
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.fa-user-secret:before {
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.fa-motorcycle:before {
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.fa-street-view:before {
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.fa-heartbeat:before {
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.fa-venus:before {
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.fa-mars:before {
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.fa-mercury:before {
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.fa-intersex:before,
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.fa-transgender-alt:before {
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.fa-venus-double:before {
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.fa-mars-double:before {
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.fa-venus-mars:before {
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.fa-mars-stroke:before {
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.fa-mars-stroke-v:before {
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.fa-mars-stroke-h:before {
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.fa-neuter:before {
  content: ""; }

.fa-genderless:before {
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.fa-facebook-official:before {
  content: ""; }

.fa-pinterest-p:before {
  content: ""; }

.fa-whatsapp:before {
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.fa-server:before {
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.fa-user-plus:before {
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.fa-user-times:before {
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.fa-hotel:before,
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  content: ""; }

.fa-viacoin:before {
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.fa-train:before {
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.fa-subway:before {
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.fa-medium:before {
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.fa-yc:before,
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  content: ""; }

.fa-optin-monster:before {
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.fa-opencart:before {
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.fa-expeditedssl:before {
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.fa-battery-4:before,
.fa-battery-full:before {
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.fa-battery-3:before,
.fa-battery-three-quarters:before {
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.fa-battery-2:before,
.fa-battery-half:before {
  content: ""; }

.fa-battery-1:before,
.fa-battery-quarter:before {
  content: ""; }

.fa-battery-0:before,
.fa-battery-empty:before {
  content: ""; }

.fa-mouse-pointer:before {
  content: ""; }

.fa-i-cursor:before {
  content: ""; }

.fa-object-group:before {
  content: ""; }

.fa-object-ungroup:before {
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.fa-sticky-note:before {
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.fa-sticky-note-o:before {
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.fa-cc-jcb:before {
  content: ""; }

.fa-cc-diners-club:before {
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.fa-clone:before {
  content: ""; }

.fa-balance-scale:before {
  content: ""; }

.fa-hourglass-o:before {
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.fa-hourglass-1:before,
.fa-hourglass-start:before {
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.fa-hourglass-2:before,
.fa-hourglass-half:before {
  content: ""; }

.fa-hourglass-3:before,
.fa-hourglass-end:before {
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.fa-hourglass:before {
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.fa-hand-grab-o:before,
.fa-hand-rock-o:before {
  content: ""; }

.fa-hand-stop-o:before,
.fa-hand-paper-o:before {
  content: ""; }

.fa-hand-scissors-o:before {
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.fa-hand-lizard-o:before {
  content: ""; }

.fa-hand-spock-o:before {
  content: ""; }

.fa-hand-pointer-o:before {
  content: ""; }

.fa-hand-peace-o:before {
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.fa-trademark:before {
  content: ""; }

.fa-registered:before {
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.fa-creative-commons:before {
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.fa-gg:before {
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.fa-gg-circle:before {
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.fa-tripadvisor:before {
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.fa-odnoklassniki:before {
  content: ""; }

.fa-odnoklassniki-square:before {
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.fa-get-pocket:before {
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.fa-wikipedia-w:before {
  content: ""; }

.fa-safari:before {
  content: ""; }

.fa-chrome:before {
  content: ""; }

.fa-firefox:before {
  content: ""; }

.fa-opera:before {
  content: ""; }

.fa-internet-explorer:before {
  content: ""; }

.fa-tv:before,
.fa-television:before {
  content: ""; }

.fa-contao:before {
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.fa-500px:before {
  content: ""; }

.fa-amazon:before {
  content: ""; }

.fa-calendar-plus-o:before {
  content: ""; }

.fa-calendar-minus-o:before {
  content: ""; }

.fa-calendar-times-o:before {
  content: ""; }

.fa-calendar-check-o:before {
  content: ""; }

.fa-industry:before {
  content: ""; }

.fa-map-pin:before {
  content: ""; }

.fa-map-signs:before {
  content: ""; }

.fa-map-o:before {
  content: ""; }

.fa-map:before {
  content: ""; }

.fa-commenting:before {
  content: ""; }

.fa-commenting-o:before {
  content: ""; }

.fa-houzz:before {
  content: ""; }

.fa-vimeo:before {
  content: ""; }

.fa-black-tie:before {
  content: ""; }

.fa-fonticons:before {
  content: ""; }

.fa-reddit-alien:before {
  content: ""; }

.fa-edge:before {
  content: ""; }

.fa-credit-card-alt:before {
  content: ""; }

.fa-codiepie:before {
  content: ""; }

.fa-modx:before {
  content: ""; }

.fa-fort-awesome:before {
  content: ""; }

.fa-usb:before {
  content: ""; }

.fa-product-hunt:before {
  content: ""; }

.fa-mixcloud:before {
  content: ""; }

.fa-scribd:before {
  content: ""; }

.fa-pause-circle:before {
  content: ""; }

.fa-pause-circle-o:before {
  content: ""; }

.fa-stop-circle:before {
  content: ""; }

.fa-stop-circle-o:before {
  content: ""; }

.fa-shopping-bag:before {
  content: ""; }

.fa-shopping-basket:before {
  content: ""; }

.fa-hashtag:before {
  content: ""; }

.fa-bluetooth:before {
  content: ""; }

.fa-bluetooth-b:before {
  content: ""; }

.fa-percent:before {
  content: ""; }

.fa-gitlab:before {
  content: ""; }

.fa-wpbeginner:before {
  content: ""; }

.fa-wpforms:before {
  content: ""; }

.fa-envira:before {
  content: ""; }

.fa-universal-access:before {
  content: ""; }

.fa-wheelchair-alt:before {
  content: ""; }

.fa-question-circle-o:before {
  content: ""; }

.fa-blind:before {
  content: ""; }

.fa-audio-description:before {
  content: ""; }

.fa-volume-control-phone:before {
  content: ""; }

.fa-braille:before {
  content: ""; }

.fa-assistive-listening-systems:before {
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.fa-asl-interpreting:before,
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  content: ""; }

.fa-deafness:before,
.fa-hard-of-hearing:before,
.fa-deaf:before {
  content: ""; }

.fa-glide:before {
  content: ""; }

.fa-glide-g:before {
  content: ""; }

.fa-signing:before,
.fa-sign-language:before {
  content: ""; }

.fa-low-vision:before {
  content: ""; }

.fa-viadeo:before {
  content: ""; }

.fa-viadeo-square:before {
  content: ""; }

.fa-snapchat:before {
  content: ""; }

.fa-snapchat-ghost:before {
  content: ""; }

.fa-snapchat-square:before {
  content: ""; }

.fa-pied-piper:before {
  content: ""; }

.fa-first-order:before {
  content: ""; }

.fa-yoast:before {
  content: ""; }

.fa-themeisle:before {
  content: ""; }

.fa-google-plus-circle:before,
.fa-google-plus-official:before {
  content: ""; }

.fa-fa:before,
.fa-font-awesome:before {
  content: ""; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0; }

.sr-only-focusable:active, .sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto; }

/*! normalize.css v2.1.0 | MIT License | git.io/normalize */
/* ==========================================================================
   HTML5 display definitions
   ========================================================================== */
/**
 * Correct `block` display not defined in IE 8/9.
 */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
main,
nav,
section,
summary {
  display: block; }

/**
 * Correct `inline-block` display not defined in IE 8/9.
 */
audio,
canvas,
video {
  display: inline-block; }

/**
 * Prevent modern browsers from displaying `audio` without controls.
 * Remove excess height in iOS 5 devices.
 */
audio:not([controls]) {
  display: none;
  height: 0; }

/**
 * Address styling not present in IE 8/9.
 */
[hidden] {
  display: none; }

/* ==========================================================================
   Base
   ========================================================================== */
/**
 * 1. Set default font family to sans-serif.
 * 2. Prevent iOS text size adjust after orientation change, without disabling
 *    user zoom.
 */
html {
  font-family: sans-serif;
  /* 1 */
  -webkit-text-size-adjust: 100%;
  /* 2 */
  -ms-text-size-adjust: 100%;
  /* 2 */ }

/**
 * Remove default margin.
 */
body {
  margin: 0; }

/* ==========================================================================
   Links
   ========================================================================== */
/**
 * Address `outline` inconsistency between Chrome and other browsers.
 */
a:focus {
  outline: thin dotted; }

/**
 * Improve readability when focused and also mouse hovered in all browsers.
 */
a:active,
a:hover {
  outline: 0; }

/* ==========================================================================
   Typography
   ========================================================================== */
/**
 * Address variable `h1` font-size and margin within `section` and `article`
 * contexts in Firefox 4+, Safari 5, and Chrome.
 */
h1 {
  font-size: 2em;
  margin: 0.67em 0; }

/**
 * Address styling not present in IE 8/9, Safari 5, and Chrome.
 */
abbr[title] {
  border-bottom: 1px dotted; }

/**
 * Address style set to `bolder` in Firefox 4+, Safari 5, and Chrome.
 */
b,
strong {
  font-weight: bold; }

/**
 * Address styling not present in Safari 5 and Chrome.
 */
dfn {
  font-style: italic; }

/**
 * Address differences between Firefox and other browsers.
 */
hr {
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  height: 0; }

/**
 * Address styling not present in IE 8/9.
 */
mark {
  background: #ff0;
  color: #000; }

/**
 * Correct font family set oddly in Safari 5 and Chrome.
 */
code,
kbd,
pre,
samp {
  font-family: monospace, serif;
  font-size: 1em; }

/**
 * Improve readability of pre-formatted text in all browsers.
 */
pre {
  white-space: pre-wrap; }

/**
 * Set consistent quote types.
 */
q {
  quotes: "\201C" "\201D" "\2018" "\2019"; }

/**
 * Address inconsistent and variable font size in all browsers.
 */
small {
  font-size: 80%; }

/**
 * Prevent `sub` and `sup` affecting `line-height` in all browsers.
 */
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline; }

sup {
  top: -0.5em; }

sub {
  bottom: -0.25em; }

/* ==========================================================================
   Embedded content
   ========================================================================== */
/**
 * Remove border when inside `a` element in IE 8/9.
 */
img {
  border: 0; }

/**
 * Correct overflow displayed oddly in IE 9.
 */
svg:not(:root) {
  overflow: hidden; }

/* ==========================================================================
   Figures
   ========================================================================== */
/**
 * Address margin not present in IE 8/9 and Safari 5.
 */
figure {
  margin: 0; }

/* ==========================================================================
   Forms
   ========================================================================== */
/**
 * Define consistent border, margin, and padding.
 */
fieldset {
  border: 1px solid #c0c0c0;
  margin: 0 2px;
  padding: 0.35em 0.625em 0.75em; }

/**
 * 1. Correct `color` not being inherited in IE 8/9.
 * 2. Remove padding so people aren't caught out if they zero out fieldsets.
 */
legend {
  border: 0;
  /* 1 */
  padding: 0;
  /* 2 */ }

/**
 * 1. Correct font family not being inherited in all browsers.
 * 2. Correct font size not being inherited in all browsers.
 * 3. Address margins set differently in Firefox 4+, Safari 5, and Chrome.
 */
button,
input,
select,
textarea {
  font-family: inherit;
  /* 1 */
  font-size: 100%;
  /* 2 */
  margin: 0;
  /* 3 */ }

/**
 * Address Firefox 4+ setting `line-height` on `input` using `!important` in
 * the UA stylesheet.
 */
button,
input {
  line-height: normal; }

/**
 * Address inconsistent `text-transform` inheritance for `button` and `select`.
 * All other form control elements do not inherit `text-transform` values.
 * Correct `button` style inheritance in Chrome, Safari 5+, and IE 8+.
 * Correct `select` style inheritance in Firefox 4+ and Opera.
 */
button,
select {
  text-transform: none; }

/**
 * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
 *    and `video` controls.
 * 2. Correct inability to style clickable `input` types in iOS.
 * 3. Improve usability and consistency of cursor style between image-type
 *    `input` and others.
 */
button,
html input[type="button"],
input[type="reset"],
input[type="submit"] {
  -webkit-appearance: button;
  /* 2 */
  cursor: pointer;
  /* 3 */ }

/**
 * Re-set default cursor for disabled elements.
 */
button[disabled],
html input[disabled] {
  cursor: default; }

/**
 * 1. Address box sizing set to `content-box` in IE 8/9.
 * 2. Remove excess padding in IE 8/9.
 */
input[type="checkbox"],
input[type="radio"] {
  box-sizing: border-box;
  /* 1 */
  padding: 0;
  /* 2 */ }

/**
 * 1. Address `appearance` set to `searchfield` in Safari 5 and Chrome.
 * 2. Address `box-sizing` set to `border-box` in Safari 5 and Chrome
 *    (include `-moz` to future-proof).
 */
input[type="search"] {
  -webkit-appearance: textfield;
  /* 1 */
  -moz-box-sizing: content-box;
  -webkit-box-sizing: content-box;
  /* 2 */
  box-sizing: content-box; }

/**
 * Remove inner padding and search cancel button in Safari 5 and Chrome
 * on OS X.
 */
input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none; }

/**
 * Remove inner padding and border in Firefox 4+.
 */
button::-moz-focus-inner,
input::-moz-focus-inner {
  border: 0;
  padding: 0; }

/**
 * 1. Remove default vertical scrollbar in IE 8/9.
 * 2. Improve readability and alignment in all browsers.
 */
textarea {
  overflow: auto;
  /* 1 */
  vertical-align: top;
  /* 2 */ }

/* ==========================================================================
   Tables
   ========================================================================== */
/**
 * Remove most spacing between table cells.
 */
table {
  border-collapse: collapse;
  border-spacing: 0; }

* {
  box-sizing: border-box;
  -webkit-overflow-scrolling: touch;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: none;
  -webkit-touch-callout: none;
  -webkit-font-smoothing: antialiased; }

html, body {
  height: 100%;
  font-size: 14px;
  color: #333333; }

body {
  text-rendering: optimizeLegibility;
  font-smoothing: antialiased;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif;
  text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%; }

.book {
  position: relative;
  width: 100%;
  height: 100%; }

@media (max-width: 600px) {
  .book.with-summary {
    overflow: hidden; } }

.book-body {
  position: absolute;
  top: 0px;
  right: 0px;
  left: 0px;
  bottom: 0px;
  overflow-y: auto; }
  @media (max-width: 1240px) {
    .book-body {
      padding-bottom: 20px; } }
  .book.without-animation .book-body {
    transition: none !important; }
  @media (max-width: 600px) {
    .book.with-summary .book-body {
      transform: translate(calc(100% - 60px), 0px); } }

.book-body .body-inner {
  position: absolute;
  top: 0px;
  right: 0px;
  left: 0px;
  bottom: 0px;
  overflow-y: auto;
  padding: 15px 25px;
  color: #303133;
  background: #f0f2f5; }
  @media (max-width: 1240px) {
    .book-body .body-inner {
      position: static;
      min-height: calc( 100% - 50px); } }

.page-wrapper {
  position: relative;
  outline: none;
  background-color: #fff; }

.page-inner {
  position: relative;
  background: #fff;
  max-width: 1200px;
  min-height: 400px;
  margin: 0px auto;
  padding: 20px 270px 40px 40px; }

.book-header {
  position: absolute; }

.page-inner .btn-group .btn {
  border-radius: 0px;
  background: #eee;
  border: 0px; }

.book-header {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  overflow: visible;
  height: 30px;
  z-index: 2;
  padding: 0px 5px;
  color: #303133;
  background: transparent; }

.book-header .btn {
  display: block;
  height: 30px;
  padding: 0px 2px;
  border-bottom: none;
  text-transform: uppercase;
  line-height: 30px;
  box-shadow: none !important;
  position: relative;
  font-size: 14px;
  color: #EBEEF5; }

.book-header .btn:hover {
  position: relative;
  text-decoration: none;
  color: #4d4d4d; }

.book-header .btn:focus {
  outline: none; }

.book-header h1 {
  display: none; }

.book-header h1 {
  margin: 0px;
  text-align: center;
  line-height: 30px;
  opacity: 0;
  transition: opacity ease 0.4s;
  padding-left: 200px;
  padding-right: 200px;
  transition: opacity 0.2s ease;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 1.25rem;
  font-weight: 200; }
  @media (max-width: 1000px) {
    .book-header h1 {
      display: none; } }

.book-header h1 a,
.book-header h1 a:hover {
  color: inherit;
  text-decoration: none; }

.book-header h1 i {
  display: none; }

.book-header:hover h1 {
  opacity: 1; }

.book.is-loading .book-header h1 i {
  display: inline-block; }

.book.is-loading .book-header h1 a {
  display: none; }

.book-summary {
  position: absolute;
  top: 0;
  left: -300px;
  bottom: 0;
  z-index: 1;
  overflow-y: auto;
  width: 300px;
  color: #364149;
  background: #171F34;
  border-right: 1px solid #f2f2f2;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 1em;
  transition: left 250ms ease; }
  @media (max-width: 600px) {
    .book-summary {
      width: calc( 100% - 60px);
      bottom: 0;
      left: -100%; } }

.book.with-summary .book-summary {
  left: 0; }

.book.without-animation .book-summary {
  transition: none !important; }

.book-body {
  transition: left 250ms ease, transform 250ms ease; }

@media (min-width: 600px) {
  .book.with-summary .book-body {
    left: 300px; } }

.book-summary, .book-body {
  top: 60px; }

.book-summary ul.summary {
  list-style: none;
  margin: 0;
  padding: 20px 0;
  transition: top 0.5s ease; }

.book-summary .hide {
  display: none !important; }

.book-summary ul.summary li {
  list-style: none; }

.book-summary ul.summary li.header {
  padding: 10px 0;
  padding-top: 20px;
  color: #939da3;
  text-transform: uppercase;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif; }

.book-summary ul.summary li.header:first-child {
  padding-top: 0; }

.book-summary ul.summary li.header.selected {
  color: #1F93FF; }

.book-summary ul.summary li.divider {
  height: 1px;
  margin: 5px 0;
  overflow: hidden;
  background: #f2f2f2; }

.book-summary ul.summary li a,
.book-summary ul.summary li span {
  position: relative;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 10px 0;
  border-bottom: none;
  font-size: 16px;
  color: #ffffff;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif; }

.book-summary ul.summary li span {
  opacity: 0.8; }

.book-summary ul.summary li.selected > a,
.book-summary ul.summary li.selected > span {
  font-weight: bold; }

.book-summary ul.summary li.active > a,
.book-summary ul.summary li a:hover {
  color: #1F93FF;
  text-decoration: none; }

.book-summary ul.summary li ul {
  padding-left: 10px; }

a {
  color: #1F93FF;
  text-decoration: none; }

a:hover {
  text-decoration: underline; }

.book.font-size-0 .book-body .page-inner section {
  font-size: 0.8rem; }

.book.font-size-1 .book-body .page-inner section {
  font-size: 1rem; }

.book.font-size-2 .book-body .page-inner section {
  font-size: 1.2rem; }

.book.font-size-3 .book-body .page-inner section {
  font-size: 1.6rem; }

.book.font-size-4 .book-body .page-inner section {
  font-size: 2.4rem; }

.markdown-section {
  display: block;
  word-wrap: break-word;
  overflow: hidden;
  line-height: 1.5;
  text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%; }

.markdown-section * {
  box-sizing: border-box;
  -webkit-box-sizing: border-box; }

.markdown-section > *:first-child {
  margin-top: 0 !important; }

.markdown-section > *:last-child {
  margin-bottom: 0 !important; }

.markdown-section .glossary-term {
  cursor: help;
  text-decoration: underline; }

pre, code, blockquote, tr, img, table, figure {
  page-break-inside: avoid; }

p, h2, h3, h4, h5 {
  orphans: 3;
  widows: 3; }

h1, h2, h3, h4, h5 {
  page-break-after: avoid; }

p {
  line-height: 1.5; }

img {
  border: 0;
  max-width: 100%; }

hr {
  overflow: hidden;
  padding: 0;
  border: none;
  height: 4px;
  margin: 30px 0;
  background-color: #f2f2f2; }

h1 {
  color: #3E3F40;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif;
  font-size: 2rem; }

h2 {
  color: #3E3F40;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif;
  font-size: 1.6rem; }

h3 {
  color: #3E3F40;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif;
  font-size: 1.2rem; }

h4 {
  color: #3E3F40;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif;
  font-size: 1rem; }

h5 {
  color: #3E3F40;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif;
  font-size: 0.9rem; }

h6 {
  color: #3E3F40;
  font-family: PingFangSC-Regular, PingFang SC, Microsoft YaHei, Helvetica Neue, Hiragino Sans GB, Helvetica, Arial, sans-serif;
  font-size: 0.8rem; }

code, pre {
  direction: ltr;
  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
  margin: 0px;
  padding: 0px;
  border: none; }

pre {
  overflow: auto;
  word-wrap: normal;
  margin: 0px;
  padding: 0.85em 1em;
  margin-bottom: 10px;
  background: #f2f2f2; }

pre > code {
  display: inline;
  max-width: initial;
  padding: 0;
  margin: 0;
  overflow: initial;
  line-height: inherit;
  white-space: pre;
  font-size: 0.85em;
  background: transparent; }
  pre > code:before, pre > code:after {
    content: normal; }

code {
  padding: 0.2em;
  margin: 0;
  font-size: 0.85em;
  background-color: #f2f2f2; }
  code:before, code:after {
    letter-spacing: -0.2em;
    content: "\00a0"; }

table {
  display: table;
  width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
  overflow: auto; }

tr {
  background-color: white;
  border-top: 1px solid #EBEEF5; }
  tr:nth-child(2n) {
    background-color: #f2f2f2; }

th {
  padding: 5px 10px;
  border: 1px solid #EBEEF5;
  font-weight: bold; }

td {
  padding: 5px 10px;
  border: 1px solid #EBEEF5; }

.markdown-section ul {
  margin-bottom: 10px;
  padding-left: 2em; }

.markdown-section ol {
  margin-bottom: 10px;
  padding-left: 2em; }

.markdown-section ol ol {
  list-style-type: lower-roman; }

blockquote {
  margin: 0 0 0 10px;
  padding: 0 20px;
  color: #909399;
  border-left: 4px solid #f2f2f2; }
  blockquote:first-child {
    margin-top: 0; }
  blockquote:last-child {
    margin-bottom: 0; }

dl {
  padding: 0; }

dl dt {
  padding: 0;
  margin-top: 10px;
  font-style: italic;
  font-weight: bold; }

dl dd {
  padding: 0 10px;
  margin-bottom: 10px; }

dd {
  margin-left: 0; }

.buttons:before, .buttons:after {
  content: " ";
  display: table; }

.buttons:after {
  clear: both; }

.button {
  border: 0;
  background-color: transparent;
  width: 100%;
  text-align: center;
  float: left;
  line-height: 1.5;
  padding: 10px 5px;
  background: #909399;
  color: #4d4d4d; }

.button:hover {
  color: #333333; }

.button:focus,
.button:hover {
  outline: none; }

.button.size-2 {
  width: 50%; }

.button.size-3 {
  width: 33%; }

.navigation {
  position: absolute;
  top: 50%;
  bottom: 50%;
  margin: 0;
  display: flex;
  justify-content: center;
  align-content: center;
  flex-direction: column;
  text-align: center;
  max-width: 150px;
  min-width: 40px;
  font-size: 40px;
  color: #EBEEF5;
  transition: all 350ms ease; }
  @media (max-width: 1240px) {
    .navigation {
      position: static;
      top: auto;
      max-width: 50%;
      width: 50%;
      display: inline-block;
      float: left; }
      .navigation.navigation-unique {
        max-width: 100%;
        width: 100%; } }

.navigation:hover {
  text-decoration: none;
  color: #4d4d4d; }

.navigation.navigation-next {
  right: 0px; }

.navigation.navigation-prev {
  left: 0px; }

#book-search-input {
  padding: 0;
  transition: top 0.5s ease;
  width: 300px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  background: white;
  border-radius: 4px;
  border: 1px solid #dcdfe6;
  float: right;
  background: #fff;
  border: 1px solid #f2f2f2; }
  #book-search-input input, #book-search-input input:focus, #book-search-input input:hover {
    box-shadow: none;
    outline: none;
    background: transparent;
    border: 1px solid transparent;
    padding: 7px 10px; }
  #book-search-input input[type="text"] {
    float: right;
    flex: 1;
    font-size: 14px;
    color: #666; }
  #book-search-input i {
    padding: 13px;
    color: #c0c4cc;
    padding: 0 13px;
    line-height: 32px;
    transform: rotate(-45deg); }

.search-results-title {
  margin-bottom: 35px; }

body.with-search .navigation {
  display: none; }

.dropdown {
  position: relative; }

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: -17px;
  z-index: 100;
  display: none;
  float: left;
  min-width: 160px;
  padding: 0;
  margin: 2px 0 0;
  list-style: none;
  font-size: 14px;
  border: 1px solid #f2f2f2;
  border-radius: 1px;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
  background-clip: padding-box;
  background: white;
  box-shadow: 0px 4px 16px 0px rgba(0, 0, 0, 0.12); }

.dropdown-menu.open {
  display: block; }

.dropdown-menu.dropdown-left {
  left: auto;
  right: 4%; }

.dropdown-menu.dropdown-left .dropdown-caret {
  right: 14px;
  left: auto; }

.dropdown-caret {
  position: absolute;
  top: -8px;
  left: 30px;
  width: 18px;
  height: 10px;
  float: left;
  overflow: hidden; }

.dropdown-caret .caret-outer {
  position: absolute;
  border-left: 9px solid transparent;
  border-right: 9px solid transparent;
  border-bottom: 9px solid #f2f2f2;
  height: auto;
  left: 0;
  top: 0;
  width: auto;
  display: inline-block;
  margin-left: -1px; }

.dropdown-caret .caret-inner {
  position: absolute;
  display: inline-block;
  margin-left: -1px;
  margin-top: -1px;
  top: 0;
  top: 1px;
  border-left: 9px solid transparent;
  border-right: 9px solid transparent;
  border-bottom: 9px solid #fff; }

.dropdown .buttons {
  border-bottom: 1px solid #f2f2f2;
  /* Clear fix */ }
  .dropdown .buttons:before, .dropdown .buttons:after {
    content: " ";
    display: table; }
  .dropdown .buttons:after {
    clear: both; }

.dropdown .buttons:last-child {
  border-bottom: none; }

.dropdown .button {
  border: 0;
  background-color: transparent;
  color: #b8c3dc;
  width: 100%;
  text-align: center;
  float: left;
  line-height: 1.5;
  padding: 8px 4px; }

.dropdown .button:hover {
  color: #4d4d4d; }

.dropdown .button:focus,
.dropdown .button:hover {
  outline: none; }

.dropdown .button.size-2 {
  width: 50%; }

.dropdown .button.size-3 {
  width: 33%; }

/* Book  anchor*/
.book-anchor {
  width: 180px;
  position: absolute;
  top: 130px;
  right: 30px;
  padding: 0 10px 10px 0px;
  z-index: 999;
  user-select: none;
  border-left: 1px solid #ececec; }
  .book-anchor a {
    display: block;
    line-height: 35px;
    color: #606266;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    left: -1px;
    position: relative; }
    .book-anchor a:hover {
      color: #1F93FF;
      text-decoration: none; }
  .book-anchor .selected {
    color: #1F93FF;
    text-decoration: none;
    font-weight: bold;
    position: relative; }
    .book-anchor .selected::before {
      content: ' ';
      width: 2px;
      height: 20px;
      background: #1f83ff;
      position: absolute;
      left: 0px;
      top: 6px; }
  .book-anchor .anchor-h2 {
    padding-left: 16px; }
  .book-anchor .anchor-h3 {
    padding-left: 24px; }

.book-anchor-title {
  line-height: 38px;
  font-weight: 400;
  cursor: pointer; }

/* 导航 */
.header-inner {
  width: 100%;
  padding: 10px 30px;
  border-bottom: 1px solid #dededede;
  margin: auto;
  *zoom: 1;
  height: 60px; }
  .header-inner:before {
    content: " ";
    display: table;
    line-height: 0; }
  .header-inner:after {
    content: " ";
    display: table;
    line-height: 0;
    clear: both; }
  .header-inner .logo {
    float: left;
    height: 50px;
    width: 120px;
    background: url("./logo.png");
    background-size: 120px 50px;
    background-repeat: no-repeat; }
    .header-inner .logo img {
      display: block;
      height: inherit;
      padding: 5px 0; }
  .header-inner .title {
    float: left;
    font-size: 16px;
    line-height: 16px;
    padding: 8px 0px 8px 16px;
    color: #333;
    position: relative; }
    .header-inner .title::after {
      content: '';
      border-left: 1px solid #ccc;
      width: 0;
      position: absolute;
      height: 15px;
      top: 12px;
      left: 8px; }
    .header-inner .title .dot {
      font-size: 25px;
      display: inline-block;
      transform: translateY(-3px);
      padding: 0 4px; }
  .header-inner .more {
    float: left; }
    .header-inner .more i.toggle-dropdown {
      font-size: 18px;
      line-height: 40px;
      padding: 0 10px;
      cursor: pointer; }
    .header-inner .more .dropdown-menu {
      left: -23px; }
    .header-inner .more ul {
      list-style: none;
      padding: 0;
      margin: 8px 0; }
      .header-inner .more ul li {
        height: 40px;
        line-height: 40px;
        padding: 0 24px;
        font-size: 14px;
        width: max-content; }
        .header-inner .more ul li a {
          color: #606266;
          text-decoration: none; }
        .header-inner .more ul li:hover a {
          color: #1a91ff; }
  .header-inner .book-logo {
    padding: 10px 0;
    float: left; }
  .header-inner .book-logo img {
    max-height: 30px; }

table tr {
  background-color: white; }
  table tr:nth-child(2n) {
    background-color: white; }

table th {
  color: #909399;
  background: #EBEEF5;
  padding: 10px; }

table td {
  color: #606266;
  padding: 20px 10px; }

@media (max-width: 768px) {
  .book-summary {
    top: 101px; }
  .book-body {
    top: 101px; }
  .header-inner #book-search-input {
    clear: both;
    width: 100%;
    top: 11px;
    position: relative; } }

@media (max-width: 1240px) {
  .book-anchor {
    display: none; }
  .page-inner {
    padding-right: 40px; } }

@media (max-width: 480px) {
  .header-inner .title {
    display: none; }
  .header-inner .title {
    display: none; } }
