diff --git a/css/base.less b/css/base.less
index 4c28f07..ba4e2f0 100755
--- a/css/base.less
+++ b/css/base.less
@@ -351,22 +351,6 @@ nav > ul {
         font-size: 80%;
     }
 
-    sub,
-    sup {
-        font-size: 75%;
-        line-height: 0;
-        position: relative;
-        vertical-align: baseline;
-    }
-
-    sup {
-        top: -0.5em;
-    }
-
-    sub {
-        bottom: -0.25em;
-    }
-
     svg:not(:root) {
         overflow: hidden;
     }