修复层级异常的问题

static/css/gitalk.css

@@ -92,7 +92,6 @@
 }
 
 .gitalk-container .gt-container .gt-spinner {
-    position: relative;
 }
 
 .gitalk-container .gt-container .gt-spinner::before {
@@ -111,7 +110,6 @@
 }
 
 .gitalk-container .gt-container .gt-loader {
-    position: relative;
     -webkit-animation: ease gt-kf-rotate 1.5s infinite;
     animation: ease gt-kf-rotate 1.5s infinite;
     display: inline-block;
@@ -193,7 +191,6 @@
 }
 
 .gitalk-container .gt-container .gt-btn-loading {
-    position: relative;
     margin-left: 0.5em;
     display: inline-block;
     width: 0.75em;
@@ -261,10 +258,8 @@
 .gitalk-container .gt-container .gt-meta {
     margin: 1.25em 0;
     padding: 1em 0;
-    position: relative;
     border-bottom: 1px solid var(--color-border-default);
     font-size: 1em;
-    z-index: 10;
 }
 
 .gitalk-container .gt-container .gt-meta:before,
@@ -333,7 +328,6 @@
     display: block;
     margin: 0.5em 0;
     padding: 0 1.125em;
-    position: relative;
 }
 
 .gitalk-container .gt-container .gt-popup .gt-action.is--active:before {
@@ -347,7 +341,6 @@
 }
 
 .gitalk-container .gt-container .gt-header {
-    position: relative;
     display: -webkit-box;
     display: -ms-flexbox;
     display: flex;
@@ -400,7 +393,6 @@
 }
 
 .gitalk-container .gt-container .gt-header-controls {
-    position: relative;
     margin: 0.75em 0 0;
 }
 
@@ -457,7 +449,6 @@
 }
 
 .gitalk-container .gt-container.gt-input-focused {
-    position: relative;
 }
 
 .gitalk-container .gt-container.gt-input-focused:after {
@@ -470,11 +461,9 @@
     opacity: 0.6;
     -webkit-transition: opacity 0.3s, bottom 0s;
     transition: opacity 0.3s, bottom 0s;
-    z-index: 9999;
 }
 
 .gitalk-container .gt-container.gt-input-focused .gt-header-comment {
-    z-index: 10000;
 }
 
 .gitalk-container .gt-container .gt-comments {
@@ -491,7 +480,6 @@
 }
 
 .gitalk-container .gt-container .gt-comment {
-    position: relative;
     padding: 0.625em 0;
     display: -webkit-box;
     display: -ms-flexbox;