diff --git a/apps/test/content/posts/task-list-test.md b/apps/test/content/posts/task-list-test.md
index 6f4d5485..f4f4b556 100644
--- a/apps/test/content/posts/task-list-test.md
+++ b/apps/test/content/posts/task-list-test.md
@@ -26,6 +26,7 @@ This post tests the rendering of task lists in Markdown.
 - [<] Scheduled Task
 - [>] Rescheduled Task
 - [!] Important Task
+- [!x] Important Checked Task
 - [?] Question Task
 - Regular list item
 
@@ -43,6 +44,7 @@ This post tests the rendering of task lists in Markdown.
       - [<] Scheduled Task
       - [>] Rescheduled Task
       - [!] Important Task
+      - [!x] Important Checked Task
       - [?] Question Task
 
 ## Mixed Content in List Items
diff --git a/assets/css/_core/_function/_index.scss b/assets/css/_core/_function/_index.scss
new file mode 100644
index 00000000..486f9dd0
--- /dev/null
+++ b/assets/css/_core/_function/_index.scss
@@ -0,0 +1,2 @@
+@import 'rgba';
+@import 'var';
diff --git a/assets/css/_core/_function/_rgba.scss b/assets/css/_core/_function/_rgba.scss
new file mode 100644
index 00000000..7b1f93ee
--- /dev/null
+++ b/assets/css/_core/_function/_rgba.scss
@@ -0,0 +1,8 @@
+/// Build an rgba-like color from any source color expression.
+/// @param {Color | String} $color - Source color, supports CSS vars such as fixit-var(secondary).
+/// @param {Number} $alpha [1] - Alpha channel value in range 0..1.
+/// @example
+///   color: fixit-rgba(fixit-var(secondary), 0.2);
+@function fixit-rgba($color, $alpha: 1) {
+  @return unquote("rgb(from #{$color} r g b / #{$alpha})");
+}
diff --git a/assets/css/_core/_function/_var.scss b/assets/css/_core/_function/_var.scss
new file mode 100644
index 00000000..8b4f6b80
--- /dev/null
+++ b/assets/css/_core/_function/_var.scss
@@ -0,0 +1,14 @@
+/// Get CSS variable with prefix
+/// @param {String} $name - CSS variable name (without prefix)
+/// @param {*} $fallback - Optional fallback value
+/// @return {String} - Complete CSS variable reference
+/// @example
+///   color: fixit-var(global-font-color);
+///   background: fixit-var(custom-bg, #fff);
+@function fixit-var($name, $fallback: null) {
+	@if $fallback {
+		@return var(#{$rootPrefix}#{$name}, #{$fallback});
+	} @else {
+		@return var(#{$rootPrefix}#{$name});
+	}
+}
diff --git a/assets/css/_core/_index.scss b/assets/css/_core/_index.scss
index ebc5a7bd..feb8facc 100644
--- a/assets/css/_core/_index.scss
+++ b/assets/css/_core/_index.scss
@@ -1,3 +1,4 @@
+@import "_function";
 @import "_mixin";
 @import "_base";
 @import "_common";
diff --git a/assets/css/_core/_mixin/_theme-vars.scss b/assets/css/_core/_mixin/_theme-vars.scss
index b478bc26..8634ad41 100644
--- a/assets/css/_core/_mixin/_theme-vars.scss
+++ b/assets/css/_core/_mixin/_theme-vars.scss
@@ -2,21 +2,6 @@
 // Theme Variable Mixins and Functions
 // ========================================
 
-/// Get CSS variable with prefix
-/// @param {String} $name - CSS variable name (without prefix)
-/// @param {*} $fallback - Optional fallback value
-/// @return {String} - Complete CSS variable reference
-/// @example
-///   color: fixit-var(global-font-color);
-///   background: fixit-var(custom-bg, #fff);
-@function fixit-var($name, $fallback: null) {
-  @if $fallback {
-    @return var(#{$rootPrefix}#{$name}, #{$fallback});
-  } @else {
-    @return var(#{$rootPrefix}#{$name});
-  }
-}
-
 /// Set a single CSS variable
 /// @param {String} $name - CSS variable name (without prefix)
 /// @param {*} $value - Variable value
diff --git a/assets/css/_page/_single/_index.scss b/assets/css/_page/_single/_index.scss
index 298fcd84..7c7d59ae 100644
--- a/assets/css/_page/_single/_index.scss
+++ b/assets/css/_page/_single/_index.scss
@@ -241,6 +241,16 @@
           color: fixit-var(task-text-color);
         }
       }
+      
+      &[data-task='x'] {
+        @include task-icon {
+          background-color: fixit-rgba(fixit-var(secondary), 0.2);
+          mask-image: linear-gradient(#000, #000);
+          mask-size: 0.875em 0.875em;
+          mask-repeat: no-repeat;
+          mask-position: center;
+        };
+      }
 
       &[data-task='-'] {
         @include task-icon {
@@ -257,7 +267,8 @@
         @include task-text(fixit-var(success));
       }
 
-      &[data-task='!'] {
+      &[data-task='!'],
+      &[data-task='!x'] {
         @include task-icon(fixit-var(danger));
       }
 
diff --git a/i18n/de.toml b/i18n/de.toml
index 26f0335c..ea6143f4 100644
--- a/i18n/de.toml
+++ b/i18n/de.toml
@@ -208,6 +208,7 @@ x = "Überprüft"
 "<" = "Geplant"
 ">" = "Verschoben"
 "!" = "Wichtig"
+"!x" = "Wichtig Erledigt"
 "?" = "Frage"
 # === Task lists ===
 
diff --git a/i18n/en.toml b/i18n/en.toml
index 8a921585..dfeaf6ed 100644
--- a/i18n/en.toml
+++ b/i18n/en.toml
@@ -208,6 +208,7 @@ x = "Checked"
 "<" = "Scheduled"
 ">" = "Rescheduled"
 "!" = "Important"
+"!x" = "Important Checked"
 "?" = "Question"
 # === Task lists ===
 
diff --git a/i18n/es.toml b/i18n/es.toml
index c80d62b3..b8799ca6 100644
--- a/i18n/es.toml
+++ b/i18n/es.toml
@@ -208,6 +208,7 @@ x = "Verificado"
 "<" = "Programado"
 ">" = "Reprogramado"
 "!" = "Importante"
+"!x" = "Importante Verificado"
 "?" = "Pregunta"
 # === Task lists ===
 
diff --git a/i18n/fr.toml b/i18n/fr.toml
index 6ef00792..c15f1f05 100644
--- a/i18n/fr.toml
+++ b/i18n/fr.toml
@@ -208,6 +208,7 @@ x = "Vérifié"
 "<" = "Planifié"
 ">" = "Replanifié"
 "!" = "Important"
+"!x" = "Important Vérifié"
 "?" = "Question"
 # === Task lists ===
 
diff --git a/i18n/hi.toml b/i18n/hi.toml
index 6b0d976b..9ffe4e8a 100644
--- a/i18n/hi.toml
+++ b/i18n/hi.toml
@@ -209,6 +209,7 @@ x = "जांच की गई"
 "<" = "अनुसूचित"
 ">" = "पुनः अनुसूचित"
 "!" = "महत्वपूर्ण"
+"!x" = "महत्वपूर्ण सत्यापित"
 "?" = "सवाल"
 # === Task lists ===
 
diff --git a/i18n/it.toml b/i18n/it.toml
index b7678cc9..6659c0f4 100644
--- a/i18n/it.toml
+++ b/i18n/it.toml
@@ -208,6 +208,7 @@ x = "Verificato"
 "<" = "Programmato"
 ">" = "Ripianificato"
 "!" = "Importante"
+"!x" = "Importante Verificato"
 "?" = "Domanda"
 # === Task lists ===
 
diff --git a/i18n/ja.toml b/i18n/ja.toml
index bb5b50d8..6ead33a1 100644
--- a/i18n/ja.toml
+++ b/i18n/ja.toml
@@ -204,6 +204,7 @@ x = "完了"
 "<" = "予定"
 ">" = "再予定"
 "!" = "重要"
+"!x" = "重要・確認済み"
 "?" = "問題"
 # === Task lists ===
 
diff --git a/i18n/ko.toml b/i18n/ko.toml
index 963e46fc..610d60b9 100644
--- a/i18n/ko.toml
+++ b/i18n/ko.toml
@@ -204,6 +204,7 @@ x = "완료"
 "<" = "계획됨"
 ">" = "다시 계획됨"
 "!" = "중요"
+"!x" = "중요 확인됨"
 "?" = "문제"
 # === Task lists ===
 
diff --git a/i18n/pl.toml b/i18n/pl.toml
index c485869f..8d9f2e08 100644
--- a/i18n/pl.toml
+++ b/i18n/pl.toml
@@ -208,6 +208,7 @@ x = "Zweryfikowane"
 "<" = "Zaplanowane"
 ">" = "Przełożone"
 "!" = "Ważne"
+"!x" = "Ważne Sprawdzone"
 "?" = "Pytanie"
 # === Task lists ===
 
diff --git a/i18n/pt-BR.toml b/i18n/pt-BR.toml
index b97d9fde..e7c4e221 100644
--- a/i18n/pt-BR.toml
+++ b/i18n/pt-BR.toml
@@ -209,6 +209,7 @@ x = "Verificado"
 "<" = "Agendado"
 ">" = "Reagendado"
 "!" = "Importante"
+"!x" = "Importante Verificado"
 "?" = "Dúvida"
 # === Task lists ===
 
diff --git a/i18n/ro.toml b/i18n/ro.toml
index 04b6f051..a63f7c9a 100644
--- a/i18n/ro.toml
+++ b/i18n/ro.toml
@@ -208,6 +208,7 @@ x = "Controlat"
 "<" = "Programat"
 ">" = "Reprogramat"
 "!" = "Important"
+"!x" = "Important Verificat"
 "?" = "Întrebare"
 # === Task lists ===
 
diff --git a/i18n/ru.toml b/i18n/ru.toml
index b8932b88..5584354d 100644
--- a/i18n/ru.toml
+++ b/i18n/ru.toml
@@ -208,6 +208,7 @@ x = "Проверено"
 "<" = "Запланировано"
 ">" = "Перенесено"
 "!" = "Важно"
+"!x" = "Важно Проверено"
 "?" = "Вопрос"
 # === Task lists ===
 
diff --git a/i18n/sr.toml b/i18n/sr.toml
index 84eac1ce..d48c1f75 100644
--- a/i18n/sr.toml
+++ b/i18n/sr.toml
@@ -208,6 +208,7 @@ x = "Проверено"
 "<" = "Планирано"
 ">" = "Преустановљено"
 "!" = "Важно"
+"!x" = "Важно Проверено"
 "?" = "Питање"
 # === Task lists ===
 
diff --git a/i18n/vi.toml b/i18n/vi.toml
index f41831ec..f3c4f0da 100644
--- a/i18n/vi.toml
+++ b/i18n/vi.toml
@@ -207,6 +207,7 @@ x = "Đã kiểm tra"
 "<" = "Đã lên lịch"
 ">" = "Đã lên lịch lại"
 "!" = "Quan trọng"
+"!x" = "Quan trọng Đã kiểm tra"
 "?" = "Câu hỏi"
 # === Task lists ===
 
diff --git a/i18n/zh-CN.toml b/i18n/zh-CN.toml
index 05f90eaf..7de671f6 100644
--- a/i18n/zh-CN.toml
+++ b/i18n/zh-CN.toml
@@ -204,6 +204,7 @@ x = "已完成"
 "<" = "已计划"
 ">" = "已重新计划"
 "!" = "重要"
+"!x" = "重要已核验"
 "?" = "问题"
 # === Task lists ===
 
diff --git a/i18n/zh-TW.toml b/i18n/zh-TW.toml
index 121ccf53..c6ea1281 100644
--- a/i18n/zh-TW.toml
+++ b/i18n/zh-TW.toml
@@ -204,6 +204,7 @@ x = "已完成"
 "<" = "已計劃"
 ">" = "已重新計劃"
 "!" = "重要"
+"!x" = "重要已核驗"
 "?" = "問題"
 # === Task lists ===
 
diff --git a/layouts/_partials/function/task-lists.html b/layouts/_partials/function/task-lists.html
index 75ed8343..99d54202 100644
--- a/layouts/_partials/function/task-lists.html
+++ b/layouts/_partials/function/task-lists.html
@@ -3,12 +3,13 @@
 
 {{- $iconMap := dict
   " " "fa-regular fa-square"
-  "x" "fa-solid fa-check-square"
+  "x" "fa-regular fa-check-square"
   "/" "fa-regular fa-square"
   "-" "fa-solid fa-square-xmark"
   "<" "fa-regular fa-calendar-plus"
   ">" "fa-regular fa-calendar-minus"
-  "!" "fa-solid fa-circle-exclamation"
+  "!" "fa-regular fa-star"
+  "!x" "fa-solid fa-star"
   "\\?" "fa-regular fa-circle-question"
 -}}
 {{- /* Custom Task lists */ -}}
@@ -41,6 +42,7 @@
   - [<] Scheduled
   - [>] Rescheduled
   - [!] Important
+  - [!x] Important Checked
   - [?] Question
 */ -}}
 {{- range $extendedSigns -}}