* {
  box-sizing: border-box;
}

/* text */

/*docs
---
title: .text-red
name: text-red
category: text
---
テキストカラー:<span class="text-red">赤■</span>

```html
<span class="text-red">.text-red</span>
```
*/
.text-red {
  color: #f66;
}

/*docs
---
title: .text-blue
name: text-blue
category: text
---
テキストカラー:<span class="text-blue">青■</span>

```html
<span class="text-blue">.text-blue</span>
```
*/
.text-blue {
  color: #66f;
}

/*docs
---
title: .text-green
name: text-green
category: text
---
テキストカラー:<span class="text-green">緑■</span>

```html
<span class="text-green">.text-green</span>
```
*/
.text-green {
  color: #6A6;
}


/* button */

/*docs
---
title: .btn-1
name: btn-1
category: btn
---
ボタン1

```html
<p><a href="DUMMY" class="btn-1">ボタン1</a></p>
<button class="btn-1">ボタン1</button>
```
*/
button.btn-1 {
  -webkit-appearance: none;
  -moz-appearance: none;
}
.btn-1 {
  display: inline-block;
  min-width: 140px;
  padding: 5px 10px;
  border: 1px solid #aaa;
  border-radius: 3px;
  background: #fff;
  outline: none;
  color: #333;
  font-size: 14px;
  text-align: center;
  text-decoration: none;
  transition: background .2s ease-in-out;
  cursor: pointer;
}
.btn-1:hover {
  background: #eaeaea;
}

/* link */

/*docs
---
title: .link-1
name: link-1
category: link
---
リンク

```html
<p><a href="DUMMY" class="link-1">リンク1</a></p>
```
*/
.link-1 {
  color: #006;
}
<!DOCTYPE html>
<html>
  <head>
    <title>test</title>
  </head>
  <body>
    <a href="./styleguide/index.html">スタイルガイド</a>
  </body>
</html>
* {
  font-family: "lato", "Mplus 1p", sans-serif;
}

pre {
  margin-bottom: 0;
}

.guide-header {
  margin: 0 0 15px;
  border-bottom: 1px solid #eaeaea;
}

.guide-categories {
  margin: 0 0 30px -5px;
  padding: 0;
  list-style: none;
  letter-spacing: -.4em;
}

.guide-categories li {
  display: inline-block;
  margin: 0 0 0 5px;
  letter-spacing: normal;
}

.guide-categories button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  -moz-appearance: none;
  -webkit-appearance: none;
  min-width: 80px;
  height: 30px;
  vertical-align: top;
  outline: none;
}

.guide-body {
  color: #333;
}

.guide-heading-1 {
  margin: 10px 0;
  color: #333;
  font-size: 28px;
  font-weight: normal;
}

.guide-heading-2 {
  padding: 0 0 0 7px;
  border-left: 3px solid #666;
  color: #333;
  font-size: 20px;
}

.guide-divide {
  margin: 20px 0;
  border: 1px solid #eaeaea;
  box-shadow: 0 2px 2px rgba(0,0,0,.05);
}

.sample {
  padding: 1px 0 0;
  border: 1px dashed #eaeaea;
  border-top: 0;
}
(function(global, $) {

  var styles = {};
  var settingJson = 'setting.json'; // ←追加

  marked.setOptions({
    langPrefix: '',
    highlight: function(code, lang) {
      return hljs.highlightAuto(code, [lang]).value;
    }
  });

  var app = new Vue({
    el: '#app',
    data: {
      siteTitle: '', // ←追加
      description: '',
      categories: [],
      curCategory: '',
      curStyles: {
        title: '',
        name: '',
        category: '',
        html: ''
      }
    },
    created: function() {
      this.getReadme();
      this.getSetting(); // ←変更
    },
    methods: {
      getReadme: function() {
        axios.get('README.md')
        .then(function (response) {
          app.description = marked(response.data);
        })
        .catch(function (error) {
          console.log(error);
        });
      },
      getSetting: function() { // ←追加
        axios.get(settingJson)
          .then(function (response) {
            var setdata = response.data;
            document.title = app.siteTitle = setdata.title;

            if (setdata.css !== undefined) {
              app.getStyles(setdata.css);
            }
          })
          .catch(function (error) {
            console.log(error);
          });
      },
      getStyles: function(resdata) { // ←変更
        $('head').append('<link rel="stylesheet" href="' + resdata + '">'); // ←追加

        axios.get(resdata) // ←変更
        .then(function (response) {
          var res = response.data.match(/\/\*docs[\s\S]*?\*\//gm);
          var tmpStyles = [];

          res.forEach(function(v,i,a) {
            var info, html, sample;
            var title = '';
            var name = '';
            var category = '';

            // html = a[i];
            html = v;

            // 情報取得
            info = html.match(/\-\-\-[\s\S]*?\-\-\-/gm);

            if (info !== null) {
              if (info[0].match(/title: ?(.*)[\s\S]/) !== null) {
                title = info[0].match(/title: ?(.*)[\s\S]/)[1];
              }
              if (info[0].match(/name: ?(.*)[\s\S]/) !== null) {
                name = info[0].match(/name: ?(.*)[\s\S]/)[1];
              }
              if (info[0].match(/category: ?(.*)[\s\S]/) !== null) {
                category = info[0].match(/category: ?(.*)[\s\S]/)[1];
                if (app.categories.indexOf(category) == -1) {
                  app.categories.push(category);
                }
              }
            }

            // sample表示用HTML取得
            sample = html.match(/\`\`\`html[\s\S]*?\`\`\`/gm);

            // 不要情報削除
            html = html.replace(/\/\*docs[\s\S]/, '')
            .replace(/[\s\S]\*\//, '')
            .replace(/\-\-\-[\s\S]*?\-\-\-/gm, '');

            // Markdown形式に変換
            html = marked(html);

            // sample表示用HTMLが存在する場合、サンプル枠を追加
            if (sample !== null) {
            sample = sample[0].replace(/\`\`\`html[\s\S]/, '').replace(/[\s\S]\`\`\`/, '');
              html = html + '<div class="sample">' + sample + '</div>';
            }

            // tmpStyles
            tmpStyles[i] = {
              title: title,
              name: name,
              category: category,
              html: html
            };
          });

          styles = tmpStyles;
          app.setCategory('');
        })
        .catch(function (error) {
          console.log(error);
        });
      },
      sortData: function(ary) {
        // 並び替えしながらセット
        app.curStyles = ary.sort(function(a, b) {
          return (a["name"] > b["name"]) ? 1 : -1;
        });
      },
      setCategory: function(str) {
        app.curCategory = str;
        // 選択したカテゴリからデータ抽出
        var tmpStyles = styles;
        var filtered = $.grep(tmpStyles,
          function(elm, index) {
            return (elm.category === app.curCategory);
          }
        );
        app.sortData(filtered);
      }
    }
  });
})(window, jQuery);
<!DOCTYPE html>
<html>

  <head>
    <link data-require="highlight.js@*" data-semver="0.7.3" rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/7.3/styles/solarized_dark.min.css" />
    <link data-require="highlight.js@*" data-semver="0.7.3" rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/7.3/styles/github.min.css" />
    <link data-require="highlight.js@*" data-semver="0.7.3" rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/7.3/styles/default.min.css" />
    <link href="https://fonts.googleapis.com/css?family=Lato" rel="stylesheet">
    <link href="https://fonts.googleapis.com/earlyaccess/mplus1p.css" rel="stylesheet" />
    <link rel="stylesheet" href="guide.css" />
  </head>

  <body>
    <div id="app">
      <header class="guide-header">
        <h1 class="guide-heading-1">{{ siteTitle }}</h1><!-- ←変更 -->
      </header>
      <ul class="guide-categories">
        <li><button @click="setCategory('')">ホーム</button></li>
        <li v-for="catItem in categories"><button @click="setCategory(catItem)">{{ catItem }}</button></li>
      </ul>
      <div v-if="curCategory === ''" class="guide-home">
        <div  v-html="description"></div>
      </div>
      <div v-for="style in curStyles" class="guide-wrapper">
        <h2 class="guide-heading-2">{{ style.title }}</h2>
        <div v-html="style.html" class="guide-body"></div>
        <hr class="guide-divide">
      </div>
    </div>
    <script data-require="jquery@2.2.4" data-semver="2.2.4" src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
    <script data-require="vue.js@*" data-semver="10.0.26" src="https://cdn.jsdelivr.net/vue/1.0.26/vue.min.js"></script>
    <script data-require="axios@*" data-semver="0.018.0" src="https://unpkg.com/axios@0.18.0/dist/axios.min.js"></script>
    <script data-require="marked@*" data-semver="0.3.5" src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.5/marked.min.js"></script>
    <script data-require="highlight.js@*" data-semver="0.7.3" src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/7.3/highlight.min.js"></script>
    <script src="guide.js"></script>
  </body>

</html>
## Vue.jsでCSSのスタイルガイドを作ってみる

README.md を読み込ませて、ホーム用の文章を表示しています。

このスタイルガイドを利用するには、以下のファイルが必要です。

- index.html(ファイル名変更可)
- guide.css(スタイルガイド用CSS)
- guide.js(スタイルガイド用JS)
- README.md(ホーム表示用Markdown)
- setting.json(タイトル、読み込むCSSを記載)

とかとか、説明文を書いたりします。
{
  "title": "Vue.js でスタイルガイド作成に挑戦!!",
  "css": "../style.css"
}