[docs update]修改字体

docs/.vuepress/styles/palette.scss

@@ -1,3 +1,23 @@
 $theme-color: #2980b9;
 $sidebar-width: 20rem;
 $sidebar-mobile-width: 16rem;
+$font-family:
+  -apple-system,
+  system-ui,
+  BlinkMacSystemFont,
+  Helvetica Neue,
+  PingFang SC,
+  Hiragino SansGB,
+  Microsoft YaHei,
+  Arial,
+  sans-serif;
+$font-family-heading:
+  -apple-system,
+  system-ui,
+  BlinkMacSystemFont,
+  Helvetica Neue,
+  PingFang SC,
+  Hiragino SansGB,
+  Microsoft YaHei,
+  Arial,
+  sans-serif;

docs/readme.md

@@ -4,7 +4,7 @@ icon: home
 title: Java 面试指南
 heroImage: /logo.svg
 heroText: JavaGuide
-tagline: 「Java学习 + 面试指南」一份涵盖大部分 Java 程序员所需要掌握的核心知识。准备 Java 面试，首选 JavaGuide！
+tagline: 「Java学习 + 面试指南」涵盖 Java 程序员需要掌握的核心知识
 actions:
   - text: 开始阅读
     link: /home.md