fix(site): fix

Author: shenjunjian

examples/sites/src/assets/custom-block.less

@@ -115,6 +115,7 @@ body {
   border-left: 0.5rem solid;
   padding: 1rem 1.5rem;
   overflow-x: auto;
+  border-radius: 8px;
 }
 .markdown-body {
   .custom-block.tip {

examples/sites/src/views/docs/docs.vue

@@ -71,6 +71,10 @@ onMounted(() => {
   background-color: #000;
 }
 
+.dark .docs-container .markdown-body pre {
+  background-color: #1a1a1a;
+}
+
 .dark .docs-container .markdown-body code {
   text-shadow: none;
   color: var(--tv-color-text);