style: 标题块 margin padding 与其他块统一、标题文本在块内垂直居中

app/src/assets/scss/component/_typography.scss

@@ -146,17 +146,11 @@
     flex-direction: column;
   }
 
-  .h1,
   h1,
-  .h2,
   h2,
-  .h3,
   h3,
-  .h4,
   h4,
-  .h5,
   h5,
-  .h6,
   h6 {
     padding: 4px;
     margin: 4px 0;
@@ -165,17 +159,32 @@
   }
 
   .h1,
+  .h2,
+  .h3,
+  .h4,
+  .h5,
+  .h6 {
+    font-weight: 600;
+  }
+
   h1 {
     padding: .3em 4px;
     font-size: 1.75em;
   }
 
-  .h2,
+  .h1 {
+    font-size: 1.75em;
+  }
+
   h2 {
     padding: .3em 4px;
     font-size: 1.55em;
   }
 
+  .h2 {
+    font-size: 1.55em;
+  }
+
   .h3,
   h3 {
     font-size: 1.38em;

app/src/assets/scss/protyle/_wysiwyg.scss

@@ -125,16 +125,6 @@
         align-items: center;
         word-break: keep-all;
 
-        & ~ .h1,
-        & ~ .h2,
-        & ~ .h3,
-        & ~ .h4,
-        & ~ .h5,
-        & ~ .h6 {
-          padding-top: 0;
-          padding-bottom: 0;
-        }
-
         &::after {
           content: "";
           position: absolute;