diff --git a/docs/_coverpage.md b/docs/_coverpage.md
index 7b7c327ea..e409f40c0 100644
--- a/docs/_coverpage.md
+++ b/docs/_coverpage.md
@@ -1,6 +1,6 @@
 ![logo](_media/icon.svg)
 
-# docsify <small>4.8.6</small>
+# docsify <small>4.9.0</small>
 
 > A magical documentation site generator.
 
diff --git a/lib/docsify.js b/lib/docsify.js
index 7b5d531b2..413cd5afe 100644
--- a/lib/docsify.js
+++ b/lib/docsify.js
@@ -3335,7 +3335,7 @@ function getAndRemoveConfig(str) {
     str = str
       .replace(/^'/, '')
       .replace(/'$/, '')
-      .replace(/:([\w-]+)=?([\w-]+)?/g, function (m, key, value) {
+      .replace(/(?:^|\s):([\w-]+)=?([\w-]+)?/g, function (m, key, value) {
         config[key] = (value && value.replace(/&quot;/g, '')) || true;
         return ''
       })
@@ -3483,6 +3483,7 @@ Compiler.prototype.compileEmbed = function compileEmbed (href, title) {
       embed = compileMedia[type].call(this, href, title);
       embed.type = type;
     }
+    embed.fragment = config.fragment;
 
     return embed
   }
@@ -3633,6 +3634,23 @@ Compiler.prototype._initRenderer = function _initRenderer () {
 
     return ("<img src=\"" + url + "\"data-origin=\"" + href + "\" alt=\"" + text + "\"" + attrs + ">")
   };
+  origin.list = renderer.list = function (body, ordered, start) {
+    var isTaskList = /<li class="task-list-item">/.test(body.split('class="task-list"')[0]);
+    var isStartReq = start && start > 1;
+    var tag = ordered ? 'ol' : 'ul';
+    var tagAttrs = [
+      (isTaskList ? 'class="task-list"' : ''),
+      (isStartReq ? ("start=\"" + start + "\"") : '')
+    ].join(' ').trim();
+
+    return ("<" + tag + " " + tagAttrs + ">" + body + "</" + tag + ">")
+  };
+  origin.listitem = renderer.listitem = function (text) {
+    var isTaskItem = /^(<input.*type="checkbox"[^>]*>)/.test(text);
+    var html = isTaskItem ? ("<li class=\"task-list-item\"><label>" + text + "</label></li>") : ("<li>" + text + "</li>");
+
+    return html
+  };
 
   renderer.origin = origin;
 
@@ -3708,6 +3726,9 @@ function btn(el) {
   var toggle = function (_) { return body.classList.toggle('close'); };
 
   el = getNode(el);
+  if (el == null) {
+    return
+  }
   on(el, 'click', function (e) {
     e.stopPropagation();
     toggle();
@@ -3723,7 +3744,9 @@ function btn(el) {
 
 function collapse(el) {
   el = getNode(el);
-
+  if (el == null) {
+    return
+  }
   on(el, 'click', function (ref) {
     var target = ref.target;
 
@@ -3761,8 +3784,10 @@ function sticky() {
  */
 function getAndActive(router, el, isParent, autoTitle) {
   el = getNode(el);
-
-  var links = findAll(el, 'a');
+  var links = [];
+  if (el != null) {
+    links = findAll(el, 'a');
+  }
   var hash = decodeURI(router.toURL(router.getCurrentPath()));
   var target;
 
@@ -3965,7 +3990,10 @@ function scrollActiveSidebar(router) {
   coverHeight = cover ? cover.offsetHeight : 0;
 
   var sidebar = getNode('.sidebar');
-  var lis = findAll(sidebar, 'li');
+  var lis = [];
+  if (sidebar != null) {
+    lis = findAll(sidebar, 'li');
+  }
 
   for (var i = 0, len = lis.length; i < len; i += 1) {
     var li = lis[i];
@@ -4049,6 +4077,11 @@ function walkFetchEmbed(ref, cb) {
           if (token.embed.type === 'markdown') {
             embedToken = compile.lexer(text);
           } else if (token.embed.type === 'code') {
+            if (token.embed.fragment) {
+              var fragment = token.embed.fragment;
+              var pattern = new RegExp(("(?:###|\\/\\/\\/)\\s*\\[" + fragment + "\\]([\\s\\S]*)(?:###|\\/\\/\\/)\\s*\\[" + fragment + "\\]"));
+              text = ((text.match(pattern) || [])[1] || '').trim();
+            }
             embedToken = compile.lexer(
               '```' +
                 token.embed.lang +
@@ -5013,7 +5046,7 @@ function initGlobalAPI () {
     dom: dom,
     get: get,
     slugify: slugify,
-    version: '4.8.6'
+    version: '4.9.0'
   };
   window.DocsifyCompiler = Compiler;
   window.marked = marked;
diff --git a/lib/docsify.min.js b/lib/docsify.min.js
index 6dfa8588d..f13cf8c5e 100644
--- a/lib/docsify.min.js
+++ b/lib/docsify.min.js
@@ -1 +1 @@
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e=this.route,i=e.path,a=G(e.query,["id"]),t=this.config,o=t.loadNavbar,s=t.requestHeaders,l=t.loadSidebar,c=this.router.getFile(i),u=Me(c+a,0,s);this.isHTML=/\.html$/g.test(c),u.then(function(e,t){return r._renderMain(e,t,r._loadSideAndNav(i,a,l,n))},function(e){r._fetchFallbackPage(c,a,n)||r._fetch404(c,a,n)}),o&&Pe(i,a,o,function(e){return r._renderNav(e)},this,!0)},Ne._fetchCover=function(){var t=this,e=this.config,n=e.coverpage,r=e.requestHeaders,i=this.route.query,a=Q(this.route.path);if(n){var o=null,s=this.route.path;if("string"==typeof n)"/"===s&&(o=n);else if(Array.isArray(n))o=-1<n.indexOf(s)&&"_coverpage";else{var l=n[s];o=!0===l?"_coverpage":l}var c=Boolean(o)&&this.config.onlyCover;return o?(o=this.router.getFile(a+o),this.coverIsHTML=/\.html$/g.test(o),F(o+G(i,["id"]),!1,r).then(function(e){return t._renderCover(e,c)})):this._renderCover(null,c),c}},Ne.$fetch=function(e){var t=this;void 0===e&&(e=p);var n=function(){h(t,"doneEach"),e()};this._fetchCover()?n():this._fetch(function(){t.$resetEvents(),n()})},Ne._fetchFallbackPage=function(n,r,i){var a=this;void 0===i&&(i=p);var e=this.config,t=e.requestHeaders,o=e.fallbackLanguages,s=e.loadSidebar;if(!o)return!1;var l=n.split("/")[1];if(-1===o.indexOf(l))return!1;var c=n.replace(new RegExp("^/"+l),"");return Me(c+r,0,t).then(function(e,t){return a._renderMain(e,t,a._loadSideAndNav(n,r,s,i))},function(){return a._fetch404(n,r,i)}),!0},Ne._fetch404=function(e,t,n){var r=this;void 0===n&&(n=p);var i=this.config,a=i.loadSidebar,o=i.requestHeaders,s=i.notFoundPage,l=this._loadSideAndNav(e,t,a,n);if(s){var c=function(t,e){var n,r,i=e.notFoundPage,a="_404"+(e.ext||".md");switch(typeof i){case"boolean":r=a;break;case"string":r=i;break;case"object":r=(n=Object.keys(i).sort(function(e,t){return t.length-e.length}).find(function(e){return t.match(new RegExp("^"+e))}))&&i[n]||a}return r}(e,this.config);return Me(this.router.getFile(c),0,o).then(function(e,t){return r._renderMain(e,t,l)},function(){return r._renderMain(null,{},l)}),!0}return this._renderMain(null,{},l),!1},qe.$resetEvents=function(){me(this.route.path,this.route.query.id),this.config.loadNavbar&&oe(this.router,"nav")},window.Docsify={util:Oe,dom:e,get:F,slugify:U,version:"4.9.0"},window.DocsifyCompiler=re,window.marked=M,window.Prism=a,function(e){var t=document.readyState;if("complete"===t||"interactive"===t)return setTimeout(e,0);document.addEventListener("DOMContentLoaded",e)}(function(e){return new Fe})}();
diff --git a/lib/plugins/search.js b/lib/plugins/search.js
index f04f4c06d..3d820f631 100644
--- a/lib/plugins/search.js
+++ b/lib/plugins/search.js
@@ -1,6 +1,18 @@
 (function () {
 var INDEXS = {};
 
+var LOCAL_STORAGE = {
+  EXPIRE_KEY: 'docsify.search.expires',
+  INDEX_KEY: 'docsify.search.index'
+};
+
+function resolveExpireKey(namespace) {
+  return namespace ? ((LOCAL_STORAGE.EXPIRE_KEY) + "/" + namespace) : LOCAL_STORAGE.EXPIRE_KEY
+}
+function resolveIndexKey(namespace) {
+  return namespace ? ((LOCAL_STORAGE.INDEX_KEY) + "/" + namespace) : LOCAL_STORAGE.INDEX_KEY
+}
+
 function escapeHtml(string) {
   var entityMap = {
     '&': '&amp;',
@@ -34,9 +46,9 @@ function getAllPaths(router) {
   return paths
 }
 
-function saveData(maxAge) {
-  localStorage.setItem('docsify.search.expires', Date.now() + maxAge);
-  localStorage.setItem('docsify.search.index', JSON.stringify(INDEXS));
+function saveData(maxAge, expireKey, indexKey) {
+  localStorage.setItem(expireKey, Date.now() + maxAge);
+  localStorage.setItem(indexKey, JSON.stringify(INDEXS));
 }
 
 function genIndex(path, content, router, depth) {
@@ -154,9 +166,13 @@ function search(query) {
 
 function init$1(config, vm) {
   var isAuto = config.paths === 'auto';
-  var isExpired = localStorage.getItem('docsify.search.expires') < Date.now();
 
-  INDEXS = JSON.parse(localStorage.getItem('docsify.search.index'));
+  var expireKey = resolveExpireKey(config.namespace);
+  var indexKey = resolveIndexKey(config.namespace);
+
+  var isExpired = localStorage.getItem(expireKey) < Date.now();
+
+  INDEXS = JSON.parse(localStorage.getItem(indexKey));
 
   if (isExpired) {
     INDEXS = {};
@@ -177,7 +193,7 @@ function init$1(config, vm) {
       .get(vm.router.getFile(path), false, vm.config.requestHeaders)
       .then(function (result) {
         INDEXS[path] = genIndex(path, result, vm.router, config.depth);
-        len === ++count && saveData(config.maxAge);
+        len === ++count && saveData(config.maxAge, expireKey, indexKey);
       });
   });
 }
@@ -311,7 +327,8 @@ var CONFIG = {
   paths: 'auto',
   depth: 2,
   maxAge: 86400000, // 1 day
-  hideOtherSidebarContent: false
+  hideOtherSidebarContent: false,
+  namespace: undefined
 };
 
 var install = function (hook, vm) {
@@ -327,6 +344,7 @@ var install = function (hook, vm) {
     CONFIG.noData = opts.noData || CONFIG.noData;
     CONFIG.depth = opts.depth || CONFIG.depth;
     CONFIG.hideOtherSidebarContent = opts.hideOtherSidebarContent || CONFIG.hideOtherSidebarContent;
+    CONFIG.namespace = opts.namespace || CONFIG.namespace;
   }
 
   var isAuto = CONFIG.paths === 'auto';
diff --git a/lib/plugins/search.min.js b/lib/plugins/search.min.js
index 35b1c7a65..14d5be28c 100644
--- a/lib/plugins/search.min.js
+++ b/lib/plugins/search.min.js
@@ -1 +1 @@
-!function(){var d={};function h(e){var n={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;","/":"&#x2F;"};return String(e).replace(/[&<>"'/]/g,function(e){return n[e]})}function o(i,a){var e="auto"===i.paths,n=localStorage.getItem("docsify.search.expires")<Date.now();if(d=JSON.parse(localStorage.getItem("docsify.search.index")),n)d={};else if(!e)return;var o,r,t=e?(o=a.router,r=[],Docsify.dom.findAll(".sidebar-nav a:not(.section-link):not([data-nosearch])").forEach(function(e){var n=e.href,t=e.getAttribute("href"),i=o.parse(n).path;i&&-1===r.indexOf(i)&&!Docsify.util.isAbsolutePath(t)&&r.push(i)}),r):i.paths,s=t.length,c=0;t.forEach(function(t){if(d[t])return c++;Docsify.get(a.router.getFile(t),!1,a.config.requestHeaders).then(function(e){var n;d[t]=function(n,e,t,i){void 0===e&&(e="");var a,o=window.marked.lexer(e),r=window.Docsify.slugify,s={};return o.forEach(function(e){if("heading"===e.type&&e.depth<=i)a=t.toURL(n,{id:r(e.text)}),s[a]={slug:a,title:e.text,body:""};else{if(!a)return;s[a]?s[a].body?s[a].body+="\n"+(e.text||""):s[a].body=e.text:s[a]={slug:a,title:"",body:""}}}),r.clear(),s}(t,e,a.router,i.depth),s===++c&&(n=i.maxAge,localStorage.setItem("docsify.search.expires",Date.now()+n),localStorage.setItem("docsify.search.index",JSON.stringify(d)))})})}var c,l="";function s(e){var n=Docsify.dom.find("div.search"),t=Docsify.dom.find(n,".results-panel"),i=Docsify.dom.find(n,".clear-button"),a=Docsify.dom.find(".sidebar-nav"),o=Docsify.dom.find(".app-name");if(!e)return t.classList.remove("show"),i.classList.remove("show"),t.innerHTML="",void(c.hideOtherSidebarContent&&(a.classList.remove("hide"),o.classList.remove("hide")));var r=function(e){var a=[],o=[];Object.keys(d).forEach(function(n){o=o.concat(Object.keys(d[n]).map(function(e){return d[n][e]}))});var r=(e=e.trim()).split(/[\s\-，\\/]+/);1!==r.length&&(r=[].concat(e,r));for(var n=function(e){var n=o[e],s=!1,c="",d=n.title&&n.title.trim(),l=n.body&&n.body.trim(),t=n.slug||"";if(d&&l&&(r.forEach(function(e){var n,t=new RegExp(e.replace(/[|\\{}()[\]^$+*?.]/g,"\\$&"),"gi"),i=-1;if(n=d&&d.search(t),i=l&&l.search(t),n<0&&i<0)s=!1;else{s=!0,i<0&&(i=0);var a,o=0;(o=0==(a=i<11?0:i-10)?70:i+e.length+60)>l.length&&(o=l.length);var r="..."+h(l).substring(a,o).replace(t,'<em class="search-keyword">'+e+"</em>")+"...";c+=r}}),s)){var i={title:h(d),content:c,url:t};a.push(i)}},t=0;t<o.length;t++)n(t);return a}(e),s="";r.forEach(function(e){s+='<div class="matching-post">\n<a href="'+e.url+'">\n<h2>'+e.title+"</h2>\n<p>"+e.content+"</p>\n</a>\n</div>"}),t.classList.add("show"),i.classList.add("show"),t.innerHTML=s||'<p class="empty">'+l+"</p>",c.hideOtherSidebarContent&&(a.classList.add("hide"),o.classList.add("hide"))}function p(e){c=e}function r(e,n){var t,i,a,o,r=n.router.parse().query.s;p(e),Docsify.dom.style("\n.sidebar {\n  padding-top: 0;\n}\n\n.search {\n  margin-bottom: 20px;\n  padding: 6px;\n  border-bottom: 1px solid #eee;\n}\n\n.search .input-wrap {\n  display: flex;\n  align-items: center;\n}\n\n.search .results-panel {\n  display: none;\n}\n\n.search .results-panel.show {\n  display: block;\n}\n\n.search input {\n  outline: none;\n  border: none;\n  width: 100%;\n  padding: 0 7px;\n  line-height: 36px;\n  font-size: 14px;\n}\n\n.search input::-webkit-search-decoration,\n.search input::-webkit-search-cancel-button,\n.search input {\n  -webkit-appearance: none;\n  -moz-appearance: none;\n  appearance: none;\n}\n.search .clear-button {\n  width: 36px;\n  text-align: right;\n  display: none;\n}\n\n.search .clear-button.show {\n  display: block;\n}\n\n.search .clear-button svg {\n  transform: scale(.5);\n}\n\n.search h2 {\n  font-size: 17px;\n  margin: 10px 0;\n}\n\n.search a {\n  text-decoration: none;\n  color: inherit;\n}\n\n.search .matching-post {\n  border-bottom: 1px solid #eee;\n}\n\n.search .matching-post:last-child {\n  border-bottom: 0;\n}\n\n.search p {\n  font-size: 14px;\n  overflow: hidden;\n  text-overflow: ellipsis;\n  display: -webkit-box;\n  -webkit-line-clamp: 2;\n  -webkit-box-orient: vertical;\n}\n\n.search p.empty {\n  text-align: center;\n}\n\n.app-name.hide, .sidebar-nav.hide {\n  display: none;\n}"),function(e){void 0===e&&(e="");var n='<div class="input-wrap">\n      <input type="search" value="'+e+'" />\n      <div class="clear-button">\n        <svg width="26" height="24">\n          <circle cx="12" cy="12" r="11" fill="#ccc" />\n          <path stroke="white" stroke-width="2" d="M8.25,8.25,15.75,15.75" />\n          <path stroke="white" stroke-width="2"d="M8.25,15.75,15.75,8.25" />\n        </svg>\n      </div>\n    </div>\n    <div class="results-panel"></div>\n    </div>',t=Docsify.dom.create("div",n),i=Docsify.dom.find("aside");Docsify.dom.toggleClass(t,"search"),Docsify.dom.before(i,t)}(r),i=Docsify.dom.find("div.search"),a=Docsify.dom.find(i,"input"),o=Docsify.dom.find(i,".input-wrap"),Docsify.dom.on(i,"click",function(e){return"A"!==e.target.tagName&&e.stopPropagation()}),Docsify.dom.on(a,"input",function(n){clearTimeout(t),t=setTimeout(function(e){return s(n.target.value.trim())},100)}),Docsify.dom.on(o,"click",function(e){"INPUT"!==e.target.tagName&&(a.value="",s())}),r&&setTimeout(function(e){return s(r)},500)}function f(e,n){p(e),function(e,n){var t=Docsify.dom.getNode('.search input[type="search"]');if(t)if("string"==typeof e)t.placeholder=e;else{var i=Object.keys(e).filter(function(e){return-1<n.indexOf(e)})[0];t.placeholder=e[i]}}(e.placeholder,n.route.path),function(e,n){if("string"==typeof e)l=e;else{var t=Object.keys(e).filter(function(e){return-1<n.indexOf(e)})[0];l=e[t]}}(e.noData,n.route.path)}var u={placeholder:"Type to search",noData:"No Results!",paths:"auto",depth:2,maxAge:864e5,hideOtherSidebarContent:!1};$docsify.plugins=[].concat(function(e,n){var t=Docsify.util,i=n.config.search||u;Array.isArray(i)?u.paths=i:"object"==typeof i&&(u.paths=Array.isArray(i.paths)?i.paths:"auto",u.maxAge=t.isPrimitive(i.maxAge)?i.maxAge:u.maxAge,u.placeholder=i.placeholder||u.placeholder,u.noData=i.noData||u.noData,u.depth=i.depth||u.depth,u.hideOtherSidebarContent=i.hideOtherSidebarContent||u.hideOtherSidebarContent);var a="auto"===u.paths;e.mounted(function(e){r(u,n),!a&&o(u,n)}),e.doneEach(function(e){f(u,n),a&&o(u,n)})},$docsify.plugins)}();
+!function(){var f={},u={EXPIRE_KEY:"docsify.search.expires",INDEX_KEY:"docsify.search.index"};function h(e){var n={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;","/":"&#x2F;"};return String(e).replace(/[&<>"'/]/g,function(e){return n[e]})}function o(o,r){var e,n,t="auto"===o.paths,s=(e=o.namespace)?u.EXPIRE_KEY+"/"+e:u.EXPIRE_KEY,c=(n=o.namespace)?u.INDEX_KEY+"/"+n:u.INDEX_KEY,a=localStorage.getItem(s)<Date.now();if(f=JSON.parse(localStorage.getItem(c)),a)f={};else if(!t)return;var i,d,l=t?(i=r.router,d=[],Docsify.dom.findAll(".sidebar-nav a:not(.section-link):not([data-nosearch])").forEach(function(e){var n=e.href,t=e.getAttribute("href"),a=i.parse(n).path;a&&-1===d.indexOf(a)&&!Docsify.util.isAbsolutePath(t)&&d.push(a)}),d):o.paths,h=l.length,p=0;l.forEach(function(i){if(f[i])return p++;Docsify.get(r.router.getFile(i),!1,r.config.requestHeaders).then(function(e){var n,t,a;f[i]=function(n,e,t,a){void 0===e&&(e="");var i,o=window.marked.lexer(e),r=window.Docsify.slugify,s={};return o.forEach(function(e){if("heading"===e.type&&e.depth<=a)i=t.toURL(n,{id:r(e.text)}),s[i]={slug:i,title:e.text,body:""};else{if(!i)return;s[i]?s[i].body?s[i].body+="\n"+(e.text||""):s[i].body=e.text:s[i]={slug:i,title:"",body:""}}}),r.clear(),s}(i,e,r.router,o.depth),h===++p&&(n=o.maxAge,t=s,a=c,localStorage.setItem(t,Date.now()+n),localStorage.setItem(a,JSON.stringify(f)))})})}var c,d="";function s(e){var n=Docsify.dom.find("div.search"),t=Docsify.dom.find(n,".results-panel"),a=Docsify.dom.find(n,".clear-button"),i=Docsify.dom.find(".sidebar-nav"),o=Docsify.dom.find(".app-name");if(!e)return t.classList.remove("show"),a.classList.remove("show"),t.innerHTML="",void(c.hideOtherSidebarContent&&(i.classList.remove("hide"),o.classList.remove("hide")));var r=function(e){var i=[],o=[];Object.keys(f).forEach(function(n){o=o.concat(Object.keys(f[n]).map(function(e){return f[n][e]}))});var r=(e=e.trim()).split(/[\s\-，\\/]+/);1!==r.length&&(r=[].concat(e,r));for(var n=function(e){var n=o[e],s=!1,c="",d=n.title&&n.title.trim(),l=n.body&&n.body.trim(),t=n.slug||"";if(d&&l&&(r.forEach(function(e){var n,t=new RegExp(e.replace(/[|\\{}()[\]^$+*?.]/g,"\\$&"),"gi"),a=-1;if(n=d&&d.search(t),a=l&&l.search(t),n<0&&a<0)s=!1;else{s=!0,a<0&&(a=0);var i,o=0;(o=0==(i=a<11?0:a-10)?70:a+e.length+60)>l.length&&(o=l.length);var r="..."+h(l).substring(i,o).replace(t,'<em class="search-keyword">'+e+"</em>")+"...";c+=r}}),s)){var a={title:h(d),content:c,url:t};i.push(a)}},t=0;t<o.length;t++)n(t);return i}(e),s="";r.forEach(function(e){s+='<div class="matching-post">\n<a href="'+e.url+'">\n<h2>'+e.title+"</h2>\n<p>"+e.content+"</p>\n</a>\n</div>"}),t.classList.add("show"),a.classList.add("show"),t.innerHTML=s||'<p class="empty">'+d+"</p>",c.hideOtherSidebarContent&&(i.classList.add("hide"),o.classList.add("hide"))}function l(e){c=e}function r(e,n){var t,a,i,o,r=n.router.parse().query.s;l(e),Docsify.dom.style("\n.sidebar {\n  padding-top: 0;\n}\n\n.search {\n  margin-bottom: 20px;\n  padding: 6px;\n  border-bottom: 1px solid #eee;\n}\n\n.search .input-wrap {\n  display: flex;\n  align-items: center;\n}\n\n.search .results-panel {\n  display: none;\n}\n\n.search .results-panel.show {\n  display: block;\n}\n\n.search input {\n  outline: none;\n  border: none;\n  width: 100%;\n  padding: 0 7px;\n  line-height: 36px;\n  font-size: 14px;\n}\n\n.search input::-webkit-search-decoration,\n.search input::-webkit-search-cancel-button,\n.search input {\n  -webkit-appearance: none;\n  -moz-appearance: none;\n  appearance: none;\n}\n.search .clear-button {\n  width: 36px;\n  text-align: right;\n  display: none;\n}\n\n.search .clear-button.show {\n  display: block;\n}\n\n.search .clear-button svg {\n  transform: scale(.5);\n}\n\n.search h2 {\n  font-size: 17px;\n  margin: 10px 0;\n}\n\n.search a {\n  text-decoration: none;\n  color: 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diff --git a/lib/themes/buble.css b/lib/themes/buble.css
index 09b8c8276..1b6c87490 100644
--- a/lib/themes/buble.css
+++ b/lib/themes/buble.css
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/lib/themes/dark.css b/lib/themes/dark.css
index c5bdac76c..6f749f26d 100644
--- a/lib/themes/dark.css
+++ b/lib/themes/dark.css
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/lib/themes/dolphin.css b/lib/themes/dolphin.css
new file mode 100644
index 000000000..86daa8d3e
--- /dev/null
+++ b/lib/themes/dolphin.css
@@ -0,0 +1 @@
+@import url("https://fonts.googleapis.com/css?family=Thasadith:400,400i,700");*{-webkit-font-smoothing:antialiased;-webkit-overflow-scrolling:touch;-webkit-tap-highlight-color:rgba(0,0,0,0);-webkit-text-size-adjust:none;-webkit-touch-callout:none;box-sizing:border-box}body:not(.ready){overflow:hidden}body:not(.ready) .app-nav,body:not(.ready)>nav,body:not(.ready) [data-cloak]{display:none}div#app{font-size:30px;font-weight:lighter;margin:40vh auto;text-align:center}div#app:empty:before{content:"Loading..."}.emoji{height:1.2rem;vertical-align:middle}.progress{background-color:var(--theme-color,#0ff);height:2px;left:0;position:fixed;right:0;top:0;transition:width .2s,opacity .4s;width:0;z-index:5}.search .search-keyword,.search a:hover{color:var(--theme-color,#0ff)}.search .search-keyword{font-style:normal;font-weight:700}body,html{height:100%}body{-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased;color:#34495e;font-family:Source Sans Pro,Helvetica 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#ddd;border-bottom-color:#ccc;border-radius:4px;box-sizing:border-box;display:none;max-height:calc(100vh - 61px);overflow-y:auto;padding:10px 0;position:absolute;right:-15px;text-align:left;top:100%;white-space:nowrap}.app-nav li ul li{display:block;font-size:14px;line-height:1rem;margin:0;margin:8px 14px;white-space:nowrap}.app-nav li ul a{display:block;font-size:inherit;margin:0;padding:0}.app-nav li ul a.active{border-bottom:0}.app-nav li:hover ul{display:block}.github-corner{border-bottom:0;position:fixed;right:0;text-decoration:none;top:0;z-index:1}.github-corner:hover .octo-arm{animation:a .56s ease-in-out}.github-corner svg{color:azure;fill:var(--theme-color,#0ff);height:80px;width:80px}main{display:block;position:relative;width:100vw;height:100%;z-index:0}main.hidden{display:none}.anchor{display:inline-block;text-decoration:none;transition:all .3s}.anchor span{color:#34495e}.anchor:hover{text-decoration:underline}.sidebar{border-right:1px solid 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ul{padding-left:20px}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:transparent;border-radius:4px}.sidebar:hover::-webkit-scrollbar-thumb{background:hsla(0,0%,53%,.4)}.sidebar:hover::-webkit-scrollbar-track{background:hsla(0,0%,53%,.1)}.sidebar-toggle{background-color:transparent;background-color:rgba(240,255,255,.8);border:0;outline:none;padding:10px;position:absolute;bottom:0;left:0;text-align:center;transition:opacity .3s;width:284px;z-index:4}.sidebar-toggle .sidebar-toggle-button:hover{opacity:.4}.sidebar-toggle span{background-color:var(--theme-color,#0ff);display:block;margin-bottom:4px;width:16px;height:2px}body.sticky .sidebar,body.sticky .sidebar-toggle{position:fixed}.content{padding-top:60px;position:absolute;top:0;right:0;bottom:0;left:300px;transition:left .25s ease}.markdown-section{margin:0 auto;max-width:800px;padding:30px 15px 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a:last-child:hover{color:inherit;opacity:.8}section.cover .cover-main>p:last-child a:hover{color:inherit}section.cover blockquote>p>a{border-bottom:2px solid var(--theme-color,#0ff);transition:color .3s}section.cover blockquote>p>a:hover{color:var(--theme-color,#0ff)}.sidebar,body{background-color:azure}.sidebar{color:#364149}.sidebar li{margin:6px 0}.sidebar ul li a{color:#505d6b;font-size:14px;font-weight:400;overflow:hidden;text-decoration:none;text-overflow:ellipsis;white-space:nowrap}.sidebar ul li a:hover{text-decoration:underline}.sidebar ul li ul{padding:0}.sidebar ul li.active>a{border-right:2px solid;color:var(--theme-color,#0ff);font-weight:600}.app-sub-sidebar li:before{content:"-";padding-right:4px;float:left}.markdown-section h1,.markdown-section h2,.markdown-section h3,.markdown-section h4,.markdown-section strong{color:#2c3e50;font-weight:600}.markdown-section a{color:var(--theme-color,#0ff);font-weight:600}.markdown-section a:hover{text-decoration:underline}.markdown-section h1{font-size:2rem;margin:0 0 1rem}.markdown-section h2{font-size:1.75rem;margin:45px 0 .8rem}.markdown-section h3{font-size:1.5rem;margin:40px 0 .6rem}.markdown-section h4{font-size:1.25rem}.markdown-section h5{font-size:1rem}.markdown-section h6{color:#777;font-size:1rem}.markdown-section figure,.markdown-section p{margin:1.2em 0}.markdown-section ol,.markdown-section p,.markdown-section ul{line-height:1.6rem;word-spacing:.05rem}.markdown-section ol,.markdown-section ul{padding-left:1.5rem}.markdown-section blockquote{border-left:4px solid var(--theme-color,#0ff);color:#858585;margin:2em 0;padding-left:20px}.markdown-section blockquote p{font-weight:600;margin-left:0}.markdown-section iframe{margin:1em 0}.markdown-section em{color:#7f8c8d}.markdown-section code{border-radius:2px;color:#e96900;font-size:.8rem;margin:0 2px;padding:3px 5px;white-space:pre-wrap}.markdown-section code,.markdown-section pre{background-color:#f8f8f8;font-family:Roboto Mono,Monaco,courier,monospace}.markdown-section pre{-moz-osx-font-smoothing:initial;-webkit-font-smoothing:initial;line-height:1.5rem;margin:1.2em 0;overflow:auto;padding:0 1.4rem;position:relative;word-wrap:normal}.token.cdata,.token.comment,.token.doctype,.token.prolog{color:#8e908c}.token.namespace{opacity:.7}.token.boolean,.token.number{color:#c76b29}.token.punctuation{color:#525252}.token.property{color:#c08b30}.token.tag{color:#2973b7}.token.string{color:var(--theme-color,#0ff)}.token.selector{color:#6679cc}.token.attr-name{color:#2973b7}.language-css .token.string,.style 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.token{-moz-osx-font-smoothing:initial;-webkit-font-smoothing:initial;min-height:1.5rem}pre:after{color:#ccc;content:attr(data-lang);font-size:.6rem;font-weight:600;height:15px;line-height:15px;padding:5px 10px 0;position:absolute;right:0;text-align:right;top:0}
\ No newline at end of file
diff --git a/lib/themes/pure.css b/lib/themes/pure.css
index 54488c86e..db31850d6 100644
--- a/lib/themes/pure.css
+++ b/lib/themes/pure.css
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/lib/themes/vue.css b/lib/themes/vue.css
index e58fdcc0e..7bfb52040 100644
--- a/lib/themes/vue.css
+++ b/lib/themes/vue.css
@@ -1 +1 @@
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\ No newline at end of file
+@import url("https://fonts.googleapis.com/css?family=Roboto+Mono|Source+Sans+Pro:300,400,600");*{-webkit-font-smoothing:antialiased;-webkit-overflow-scrolling:touch;-webkit-tap-highlight-color:rgba(0,0,0,0);-webkit-text-size-adjust:none;-webkit-touch-callout:none;box-sizing:border-box}body:not(.ready){overflow:hidden}body:not(.ready) .app-nav,body:not(.ready)>nav,body:not(.ready) [data-cloak]{display:none}div#app{font-size:30px;font-weight:lighter;margin:40vh auto;text-align:center}div#app:empty:before{content:"Loading..."}.emoji{height:1.2rem;vertical-align:middle}.progress{background-color:var(--theme-color,#42b983);height:2px;left:0;position:fixed;right:0;top:0;transition:width .2s,opacity .4s;width:0;z-index:5}.search .search-keyword,.search a:hover{color:var(--theme-color,#42b983)}.search .search-keyword{font-style:normal;font-weight:700}body,html{height:100%}body{-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased;color:#34495e;font-family:Source Sans 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ul{padding-left:20px}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:transparent;border-radius:4px}.sidebar:hover::-webkit-scrollbar-thumb{background:hsla(0,0%,53%,.4)}.sidebar:hover::-webkit-scrollbar-track{background:hsla(0,0%,53%,.1)}.sidebar-toggle{background-color:transparent;background-color:hsla(0,0%,100%,.8);border:0;outline:none;padding:10px;position:absolute;bottom:0;left:0;text-align:center;transition:opacity .3s;width:284px;z-index:4}.sidebar-toggle .sidebar-toggle-button:hover{opacity:.4}.sidebar-toggle span{background-color:var(--theme-color,#42b983);display:block;margin-bottom:4px;width:16px;height:2px}body.sticky .sidebar,body.sticky .sidebar-toggle{position:fixed}.content{padding-top:60px;position:absolute;top:0;right:0;bottom:0;left:300px;transition:left .25s ease}.markdown-section{margin:0 auto;max-width:800px;padding:30px 15px 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1rem}.markdown-section h2{font-size:1.75rem;margin:45px 0 .8rem}.markdown-section h3{font-size:1.5rem;margin:40px 0 .6rem}.markdown-section h4{font-size:1.25rem}.markdown-section h5{font-size:1rem}.markdown-section h6{color:#777;font-size:1rem}.markdown-section figure,.markdown-section p{margin:1.2em 0}.markdown-section ol,.markdown-section p,.markdown-section ul{line-height:1.6rem;word-spacing:.05rem}.markdown-section ol,.markdown-section ul{padding-left:1.5rem}.markdown-section blockquote{border-left:4px solid var(--theme-color,#42b983);color:#858585;margin:2em 0;padding-left:20px}.markdown-section blockquote p{font-weight:600;margin-left:0}.markdown-section iframe{margin:1em 0}.markdown-section em{color:#7f8c8d}.markdown-section code{border-radius:2px;color:#e96900;font-size:.8rem;margin:0 2px;padding:3px 5px;white-space:pre-wrap}.markdown-section code,.markdown-section pre{background-color:#f8f8f8;font-family:Roboto Mono,Monaco,courier,monospace}.markdown-section pre{-moz-osx-font-smoothing:initial;-webkit-font-smoothing:initial;line-height:1.5rem;margin:1.2em 0;overflow:auto;padding:0 1.4rem;position:relative;word-wrap:normal}.token.cdata,.token.comment,.token.doctype,.token.prolog{color:#8e908c}.token.namespace{opacity:.7}.token.boolean,.token.number{color:#c76b29}.token.punctuation{color:#525252}.token.property{color:#c08b30}.token.tag{color:#2973b7}.token.string{color:var(--theme-color,#42b983)}.token.selector{color:#6679cc}.token.attr-name{color:#2973b7}.language-css .token.string,.style .token.string,.token.entity,.token.url{color:#22a2c9}.token.attr-value,.token.control,.token.directive,.token.unit{color:var(--theme-color,#42b983)}.token.function,.token.keyword{color:#e96900}.token.atrule,.token.regex,.token.statement{color:#22a2c9}.token.placeholder,.token.variable{color:#3d8fd1}.token.deleted{text-decoration:line-through}.token.inserted{border-bottom:1px dotted 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\ No newline at end of file
diff --git a/packages/docsify-server-renderer/package-lock.json b/packages/docsify-server-renderer/package-lock.json
index 190ab624b..be4696fed 100644
--- a/packages/docsify-server-renderer/package-lock.json
+++ b/packages/docsify-server-renderer/package-lock.json
@@ -37,5 +37,5 @@
       "integrity": "sha1-6DWIAbhrg7F1YNTjw4LXrvIQCUQ="
     }
   },
-  "version": "4.8.6"
+  "version": "4.9.0"
 }
diff --git a/packages/docsify-server-renderer/package.json b/packages/docsify-server-renderer/package.json
index 207863141..f6b612a4b 100644
--- a/packages/docsify-server-renderer/package.json
+++ b/packages/docsify-server-renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "docsify-server-renderer",
-  "version": "4.8.6",
+  "version": "4.9.0",
   "description": "docsify server renderer",
   "author": {
     "name": "qingwei-li",