diff --git a/Cargo.lock b/Cargo.lock
index a42baf4..5a1e771 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -463,6 +463,12 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "base64"
+version = "0.23.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac07cdecf99051d9a5238b80f35af32cdeba5b336e55d957b318b50137e18da5"
+
 [[package]]
 name = "bindgen"
 version = "0.72.1"
@@ -796,6 +802,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "core_maths"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77745e017f5edba1a9c1d854f6f3a52dac8a12dd5af5d2f54aecf61e43d80d30"
+dependencies = [
+ "libm",
+]
+
 [[package]]
 name = "coreaudio-rs"
 version = "0.11.3"
@@ -1036,6 +1051,18 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "egui-system-fonts"
+version = "0.36.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6607438a84f3bd373419978c1e3f2e775bc01a5ad115a545cb11d07b349cfe30"
+dependencies = [
+ "egui",
+ "ehttp",
+ "log",
+ "system-fonts",
+]
+
 [[package]]
 name = "egui-wgpu"
 version = "0.36.1"
@@ -1092,6 +1119,20 @@ dependencies = [
  "winit",
 ]
 
+[[package]]
+name = "ehttp"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2f1b93eb2e039aaff63ce07cca59bd1dca02f2ce30075a17b619d2c42f56efc"
+dependencies = [
+ "document-features",
+ "js-sys",
+ "ureq 3.4.2",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
 [[package]]
 name = "either"
 version = "1.18.0"
@@ -1294,6 +1335,29 @@ dependencies = [
  "bytemuck",
 ]
 
+[[package]]
+name = "fontconfig-parser"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbc773e24e02d4ddd8395fd30dc147524273a83e54e0f312d986ea30de5f5646"
+dependencies = [
+ "roxmltree",
+]
+
+[[package]]
+name = "fontdb"
+version = "0.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "457e789b3d1202543297a350643cf459f836cade38934e7a4cf6a39e7cde2905"
+dependencies = [
+ "fontconfig-parser",
+ "log",
+ "memmap2",
+ "slotmap",
+ "tinyvec",
+ "ttf-parser",
+]
+
 [[package]]
 name = "foreign-types"
 version = "0.5.0"
@@ -1635,6 +1699,22 @@ version = "3.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "62adaabb884c94955b19907d60019f4e145d091c75345379e70d1ee696f7854f"
 
+[[package]]
+name = "http"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "918d3568bebf352712bc2ef3d46a8bcf1a75b373be6539de198e9105cbbf9ce0"
+dependencies = [
+ "bytes",
+ "itoa",
+]
+
+[[package]]
+name = "httparse"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dbf3de79e51f3d586ab4cb9d5c3e2c14aa28ed23d180cf89b4df0454a69cc87"
+
 [[package]]
 name = "icu_collections"
 version = "2.3.0"
@@ -3048,6 +3128,12 @@ dependencies = [
  "symphonia",
 ]
 
+[[package]]
+name = "roxmltree"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c20b6793b5c2fa6553b250154b78d6d0db37e72700ae35fad9387a46f487c97"
+
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"
@@ -3535,6 +3621,17 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "system-fonts"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46ba78ea149d4bb0626dacad10aa789eedc83395889890a0e6e7ec69a4577442"
+dependencies = [
+ "fontdb",
+ "sys-locale",
+ "web-sys",
+]
+
 [[package]]
 name = "tar"
 version = "0.4.46"
@@ -3748,6 +3845,9 @@ name = "ttf-parser"
 version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2df906b07856748fa3f6e0ad0cbaa047052d4a7dd609e231c4f72cee8c36f31"
+dependencies = [
+ "core_maths",
+]
 
 [[package]]
 name = "type-map"
@@ -3811,7 +3911,7 @@ version = "2.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "02d1a66277ed75f640d608235660df48c8e3c19f3b4edb6a263315626cc3c01d"
 dependencies = [
- "base64",
+ "base64 0.22.1",
  "flate2",
  "log",
  "once_cell",
@@ -3823,6 +3923,35 @@ dependencies = [
  "webpki-roots 0.26.11",
 ]
 
+[[package]]
+name = "ureq"
+version = "3.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a7ac20be9b7726e0bbdbf974c059676d9acb1cd414961f570a4e8231cacd7fc"
+dependencies = [
+ "base64 0.23.1",
+ "flate2",
+ "log",
+ "percent-encoding",
+ "rustls",
+ "rustls-pki-types",
+ "ureq-proto",
+ "utf8-zero",
+ "webpki-roots 1.0.9",
+]
+
+[[package]]
+name = "ureq-proto"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f86fd172ccca569e458f61b6bdd6220965a9ef36e672a6852953b51a0e1583be"
+dependencies = [
+ "base64 0.23.1",
+ "http",
+ "httparse",
+ "log",
+]
+
 [[package]]
 name = "url"
 version = "2.5.8"
@@ -3835,6 +3964,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "utf8-zero"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8c0a043c9540bae7c578c88f91dda8bd82e59ae27c21baca69c8b191aaf5a6e"
+
 [[package]]
 name = "utf8_iter"
 version = "1.0.4"
@@ -3858,6 +3993,7 @@ version = "0.7.0"
 dependencies = [
  "cc",
  "eframe",
+ "egui-system-fonts",
  "flate2",
  "rfd",
  "rodio",
@@ -3867,7 +4003,7 @@ dependencies = [
  "sha2",
  "sys-locale",
  "tar",
- "ureq",
+ "ureq 2.12.1",
  "winres",
  "zip",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index f1e8694..bbdc082 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,6 +23,7 @@ zip = { version = "2.2", default-features = false, features = ["deflate"] }
 flate2 = "1.0"
 tar = "0.4"
 sys-locale = "0.3"
+egui-system-fonts = "0.36.0"
 
 [build-dependencies]
 cc = "1.2"
diff --git a/src/ui/app.rs b/src/ui/app.rs
index 44a77d9..2486d56 100644
--- a/src/ui/app.rs
+++ b/src/ui/app.rs
@@ -34,48 +34,7 @@ pub struct VcdPlayerApp {
 }
 
 fn setup_custom_fonts(ctx: &egui::Context) {
-    let mut fonts = egui::FontDefinitions::default();
-
-    // Candidate CJK font paths on Windows, Linux, and macOS
-    let candidate_font_paths = [
-        // Windows (Microsoft YaHei, SimSun, SimHei)
-        r"C:\Windows\Fonts\msyh.ttc",
-        r"C:\Windows\Fonts\msyh.ttf",
-        r"C:\Windows\Fonts\simsun.ttc",
-        r"C:\Windows\Fonts\simhei.ttf",
-        // Linux
-        "/usr/share/fonts/truetype/wqy/wqy-microhei.ttc",
-        "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
-        // macOS
-        "/System/Library/Fonts/PingFang.ttc",
-        "/Library/Fonts/Songti.ttc",
-    ];
-
-    for path in candidate_font_paths {
-        if let Ok(bytes) = std::fs::read(path) {
-            fonts.font_data.insert(
-                "cjk_font".to_owned(),
-                std::sync::Arc::new(egui::FontData::from_owned(bytes)),
-            );
-
-            // Add CJK font at highest priority for Proportional font family
-            fonts
-                .families
-                .entry(egui::FontFamily::Proportional)
-                .or_default()
-                .insert(0, "cjk_font".to_owned());
-
-            fonts
-                .families
-                .entry(egui::FontFamily::Monospace)
-                .or_default()
-                .push("cjk_font".to_owned());
-
-            break;
-        }
-    }
-
-    ctx.set_fonts(fonts);
+    egui_system_fonts::set_auto(ctx, egui_system_fonts::FontStyle::Sans);
 }
 
 /// Transient status message linger duration (5 seconds).