去除less依赖

docs/assets/docs.css

@@ -0,0 +1,56 @@
+html, body, div, span, applet, object, iframe,
+h1, h2, h3, h4, h5, h6, p, blockquote, pre,
+a, abbr, acronym, address, big, cite, code,
+del, dfn, em, img, ins, kbd, q, s, samp,
+small, strike, strong, sub, sup, tt, var,
+b, u, i, center,
+dl, dt, dd, ol, ul, li,
+fieldset, form, label, legend,
+table, caption, tbody, tfoot, thead, tr, th, td,
+article, aside, canvas, details, embed, 
+figure, figcaption, footer, header, hgroup, 
+menu, nav, output, ruby, section, summary,
+time, mark, audio, video {
+  margin: 0;
+  padding: 0;
+  border: 0;
+  font-size: 100%;
+  vertical-align: baseline;
+}
+
+body {
+  font-family: 'Helvetica Neue',Helvetica,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',SimSun,sans-serif;
+  overflow: auto;
+  font-weight: 400;
+  -webkit-font-smoothing: antialiased;
+}
+
+a {
+  color: #4078c0;
+  text-decoration: none;
+}
+
+button, input, select, textarea {
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+  color: inherit;
+}
+
+ul {
+  list-style: none;
+}
+
+.hljs {
+  line-height: 1.8;
+  font-family: Menlo, Monaco, Consolas, Courier, monospace;
+  font-size: 12px;
+  padding: 18px 24px;
+  background-color: #f9fafc;
+  border: solid 1px #eaeefb;
+  margin-bottom: 25px;
+  border-radius: 4px;
+  -webkit-font-smoothing: auto;
+}
+
+