correct frame title.

typst cannot properly handle ul/bold/it math...

firatheme.typ

@@ -40,6 +40,8 @@
       linebreaks: self.store.mini-slides.at("linebreaks", default: true),
       short-heading: self.store.mini-slides.at("short-heading", default: true),
     )
+  } else if self.store.navigation == "line" {
+    
   }
 }
 
@@ -324,7 +326,7 @@
     short-heading: true,
   ),
   footer: none,
-  footer-right: context utils.slide-counter.display() + " / " + utils.last-slide-number,
+  footer-right: none,
   primary: rgb("#0c4842"),
   alpha: 60%,
   subslide-preamble: self => block(
@@ -341,10 +343,15 @@
     (height: 4em, x: 2em, display-section: false, display-subsection: true, linebreaks: true, short-heading: true),
     mini-slides,
   )
-  set text(size: 24pt, font: "FiraGO", weight: 400)
+  set text(size: 24pt, font: ("FiraGO","Source Han Sans SC"), weight: 400)
   show math.equation: set text(font: "Fira Math")
   set strong(delta: 200)
   set par(justify: true)
+  show heading: it => [
+  #set text(size: 1.21em)
+  #it.body
+  // #underline(it.body,stroke: 4pt, offset: 4pt)
+]
 
   show: touying-slides.with(
     config-page(

touying.typ

@@ -6,7 +6,7 @@
 
 #show: fira-theme.with(
   // aspect-ratio: "16-9",
-  navigation: "mini-slides",
+  navigation: "line",
   config-info(
     title: [Looong LONG lng Long longlonglonglonglonglong TITLE],
     subtitle: [Subtitle],
@@ -24,7 +24,7 @@
 
 = Section A
 
-== Subsection A.1
+== General piecewise linear convex function *$bb(R)^b bb(Z)^n $*
 
 $ x_(n+1) = (x_n + a/x_n) / 2 $