style(docs): fix some doc site style issue

fix some doc site style issue

src/scss/custom.scss

@@ -23,6 +23,7 @@
   --doc-sidebar-section-title: #c9c5d0;
   --logto-border: #c4c7c7;
   --ifm-menu-link-sublist-icon: url('/static/img/menu-link-sublist-icon.svg');
+  --ifm-link-hover-decoration: none;
 
   --padding-max-width: 100px;
 }
@@ -41,6 +42,10 @@
   --logto-border: #5c5f60;
 }
 
+body #__docusaurus {
+  min-height: 100vh;
+}
+
 // Top Nav
 .navbar {
   box-shadow: 0px 4px 8px rgba(66, 41, 159, 0.08);
@@ -51,6 +56,15 @@
   margin-right: _.unit(2);
 }
 
+.navbar__logo {
+  display: flex;
+  align-items: center;
+
+  img {
+    height: 30px;
+  }
+}
+
 .navbar__item {
   font-size: 16px;
   line-height: 24px;
@@ -89,6 +103,11 @@
   word-break: break-word;
 }
 
+// overwrite default link hover color.
+a.menu__link:not(.menu__link--active):hover {
+  color: var(--ifm-menu-color);
+}
+
 .menu__list-item-collapsible {
   align-items: center;