fix: Fix the underline animation of the links

src/styles/modules/mdx.module.scss

@@ -122,56 +122,59 @@ main {
               margin: 0 1.5em;
             }
           }
-
-          a:has(code[class*="language-"]) {
-            position: relative;
+          a {
             color: light.$pacify-success;
-            text-decoration: none;
-            transition: color 0.3s ease;
-            background-image: none !important;
-
-            &::after {
-              content: "";
-              position: absolute;
-              left: 0;
-              bottom: -0.05em;
-              width: 100%;
-              height: 0.1rem;
-              background-color: light.$pacify-success;
-              transform: scaleX(1);
-              transform-origin: left;
-              transition: transform 0.4s ease;
-            }
-
-            &:hover {
-              color: light.$pacify-success;
+            &:has(code[class*="language-"]) {
+              position: relative;
+              text-decoration: none;
+              transition: color 0.3s ease;
+              background-image: none !important;
 
               &::after {
+                content: "";
+                position: absolute;
+                left: 0;
+                bottom: -0.05em;
+                width: 100%;
+                height: 0.1rem;
+                background-color: light.$pacify-success;
                 transform: scaleX(0);
                 transform-origin: right;
+                transition: transform 0.4s ease;
+              }
+
+              &:hover {
+                &::after {
+                  transform: scaleX(1);
+                  transform-origin: left;
+                }
+              }
+            }
+
+            &:not([data-footnote-ref]):not([data-footnote-backref]):not(
+                [aria-label*="permalink"]
+              ):not(code[class*="language-"]) {
+              background-image: linear-gradient(
+                to right,
+                light.$pacify-success,
+                light.$pacify-success
+              );
+
+              background-size: 0 0.1rem, 100% 0.1rem;
+              background-position: 100% 100%, 0 100%;
+
+              background-repeat: no-repeat;
+              transition: background-size 0.4s ease;
+
+              &:hover,
+              &:focus {
+                background-size: 100% 0.1rem, 0 0.1rem;
+                background-position: 0 100%, 100% 100%;
               }
             }
-          }
 
-          a:not([data-footnote-ref]):not([data-footnote-backref]):not(
-              [aria-label*="permalink"]
-            ):not(code[class*="language-"]) {
-            background-image: linear-gradient(
-              to right,
-              light.$pacify-success,
-              light.$pacify-success
-            );
-
-            background-size: 0 0.1rem, 100% 0.1rem;
-            background-position: 100% 100%, 0 100%;
-
-            background-repeat: no-repeat;
-            transition: background-size 0.4s ease;
-
-            &:hover,
-            &:focus {
-              background-size: 100% 0.1rem, 0 0.1rem;
-              background-position: 0 100%, 100% 100%;
+            code[class*="language-"] {
+              color: light.$pacify-success;
             }
           }