markdown 组件和代码高亮组件优化

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src/components/highlight-styles/atelier-seaside-light.css

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+/* Base16 Atelier Seaside Light - Theme */
+/* by Bram de Haan (http://atelierbram.github.io/syntax-highlighting/atelier-schemes/seaside) */
+/* Original Base16 color scheme by Chris Kempson (https://github.com/chriskempson/base16) */
+
+/* Atelier-Seaside Comment */
+.hljs-comment,
+.hljs-quote {
+  color: #687d68;
+}
+
+/* Atelier-Seaside Red */
+.hljs-variable,
+.hljs-template-variable,
+.hljs-attribute,
+.hljs-tag,
+.hljs-name,
+.hljs-regexp,
+.hljs-link,
+.hljs-name,
+.hljs-selector-id,
+.hljs-selector-class {
+  color: #e6193c;
+}
+
+/* Atelier-Seaside Orange */
+.hljs-number,
+.hljs-meta,
+.hljs-built_in,
+.hljs-builtin-name,
+.hljs-literal,
+.hljs-type,
+.hljs-params {
+  color: #87711d;
+}
+
+/* Atelier-Seaside Green */
+.hljs-string,
+.hljs-symbol,
+.hljs-bullet {
+  color: #29a329;
+}
+
+/* Atelier-Seaside Blue */
+.hljs-title,
+.hljs-section {
+  color: #3d62f5;
+}
+
+/* Atelier-Seaside Purple */
+.hljs-keyword,
+.hljs-selector-tag {
+  color: #ad2bee;
+}
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  background: #f4fbf4;
+  color: #5e6e5e;
+  padding: 0.5em;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}