feat: add theme and style

components/theme/themes/shared/genFontSizes.ts

@@ -0,0 +1,22 @@
+// https://zhuanlan.zhihu.com/p/32746810
+export default function getFontSizes(base: number) {
+  const fontSizes = new Array(10).fill(null).map((_, index) => {
+    const i = index - 1
+    const baseSize = base * 2.71828 ** (i / 5)
+    const intSize = index > 1 ? Math.floor(baseSize) : Math.ceil(baseSize)
+
+    // Convert to even
+    return Math.floor(intSize / 2) * 2
+  })
+
+  fontSizes[1] = base
+
+  return fontSizes.map(size => {
+    const height = size + 8
+
+    return {
+      size,
+      lineHeight: height / size
+    }
+  })
+}