feat: add fonts for Traditional Chinese

lib/fonts/_kai.scss

@@ -0,0 +1,31 @@
+/**
+ * Author: Sivan [sun.sivan@gmail.com]
+ * Description: define font-face Heti Kai.
+ */
+
+// 标准 Regular
+@font-face {
+  font-family: "Heti Kai";
+  src:
+    local("Kaiti SC Regular"),
+    local("Kaiti TC Regular"),
+    local("BiauKai");
+}
+
+// 粗体 Bold
+@font-face {
+  font-family: "Heti Kai";
+  font-weight: 600;
+  src:
+    local("Kaiti SC Bold"),
+    local("Kaiti TC Bold");
+}
+
+// 黑体 Black
+@font-face {
+  font-family: "Heti Kai Black";
+  font-weight: 800;
+  src:
+    local("Kaiti SC Black"),
+    local("Kaiti TC Black");
+}