docs: update site style

packages/vant-cli/site/common/style/highlight.less

@@ -9,7 +9,7 @@ code {
   font-weight: 400;
   font-size: 13px;
   font-family: @van-doc-code-font-family;
-  line-height: 24px;
+  line-height: 26px;
   white-space: pre-wrap;
   word-wrap: break-word;
 }

packages/vant-cli/site/common/style/var.less

@@ -15,6 +15,7 @@
 @van-doc-padding: 30px;
 @van-doc-row-max-width: 1680px;
 @van-doc-nav-width: 220px;
+@van-doc-border-radius: 12px;
 
 // header
 @van-doc-header-top-height: 60px;

packages/vant-cli/site/desktop/components/Content.vue

@@ -32,7 +32,7 @@ export default {
     margin-bottom: 24px;
     padding: 24px;
     background-color: #fff;
-    border-radius: 6px;
+    border-radius: @van-doc-border-radius;
     box-shadow: 0 8px 12px #ebedf0;
   }
 
@@ -96,7 +96,6 @@ export default {
     color: @van-doc-text-color;
     font-size: 13px;
     line-height: 1.5;
-    border-radius: 6px;
     border-collapse: collapse;
 
     th {
@@ -148,7 +147,7 @@ export default {
     padding-left: 15px;
     color: @van-doc-text-color;
     font-size: 14px;
-    line-height: 22px;
+    line-height: 26px;
 
     &::before {
       position: absolute;
@@ -177,7 +176,7 @@ export default {
     margin: 2px 3px;
     padding: 2px 5px;
     background-color: #f0f2f5;
-    box-shadow: none;
+    border-radius: 4px;
   }
 
   section {
@@ -189,22 +188,22 @@ export default {
     margin: 20px 0 0;
     padding: 16px;
     color: rgba(52, 73, 94, 0.8);
+    font-weight: 500;
     font-size: 14px;
     background-color: #ecf9ff;
-    border-left: 5px solid #50bfff;
-    border-radius: 4px;
+    border-radius: @van-doc-border-radius;
   }
 
   img {
     width: 100%;
-    margin: 15px 0;
-    box-shadow: 0 2px 4px #ebedf0;
+    margin: 16px 0;
+    border-radius: @van-doc-border-radius;
   }
 
   &--changelog {
     strong {
       display: block;
-      margin: 12px 0;
+      margin: 24px 0 12px;
       font-weight: 500;
       font-size: 15px;
     }

packages/vant-cli/site/desktop/components/Header.vue

@@ -156,7 +156,7 @@ export default {
   &__cube {
     position: relative;
     display: block;
-    padding: 0 10px;
+    padding: 0 12px;
     color: #fff;
     font-size: 14px;
     font-family: 'Helvetica Neue', Arial, sans-serif;
@@ -194,13 +194,13 @@ export default {
       line-height: 36px;
       text-align: left;
       background-color: #fff;
-      border-radius: 3px;
+      border-radius: @van-doc-border-radius;
       box-shadow: 0 4px 12px #ebedf0;
       transform-origin: top;
       transition: 0.2s cubic-bezier(0.215, 0.61, 0.355, 1);
 
       &-item {
-        padding-left: 7px;
+        padding-left: 12px;
         transition: 0.2s;
 
         &:hover {

packages/vant-cli/site/desktop/components/Simulator.vue

@@ -56,7 +56,7 @@ export default {
   min-width: @van-doc-simulator-width;
   overflow: hidden;
   background: #fafafa;
-  border-radius: 6px;
+  border-radius: @van-doc-border-radius;
   box-shadow: #ebedf0 0 4px 12px;
 
   @media (max-width: 1100px) {