From 2d7f903b3df4c0364356fac54858dfb77376af66 Mon Sep 17 00:00:00 2001
From: Snowball_233 <wangrb.qq@outlook.com>
Date: Fri, 23 Jan 2026 01:17:17 +0800
Subject: [PATCH] Configure font fallbacks for box-drawing chars and emoji
 support

---
 book.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/book.toml b/book.toml
index a6ac995b..8f65b430 100644
--- a/book.toml
+++ b/book.toml
@@ -31,7 +31,7 @@ output-file = "rust-course.pdf"
 pdf-engine = "tectonic"
 pdf-engine-opt = ["-Z", "continue-on-errors"]
 to = "pdf"
-variables = { mainfont = "Noto Sans CJK SC", sansfont = "Noto Sans CJK SC", CJKmainfont = "Noto Sans CJK SC", monofont = "DejaVu Sans Mono" }
+variables = { mainfont = "Noto Sans CJK SC", sansfont = "Noto Sans CJK SC", CJKmainfont = "Noto Sans CJK SC", monofont = "DejaVu Sans Mono", monofontfallback = ["DejaVu Sans Mono:", "Noto Color Emoji:"], mainfontfallback = ["Noto Sans CJK SC:", "Noto Color Emoji:"] }
 
 [output.pandoc.profile.epub]
 output-file = "rust-course.epub"