chore: 新增主题风格

src/styles/1.less

@@ -0,0 +1,91 @@
+body.has-sidebar-page #main-outlet-wrapper {
+  max-width: 95%
+}
+
+#main:before {
+  content: "";
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100vw;
+  height: 100vh;
+  background-position: top;
+  background: url(https://linux.do/uploads/default/original/3X/1/5/15f54137e70a147bae0ab5198682e87800bae61b.jpeg);
+  background-repeat: no-repeat;
+  background-attachment: fixed;
+  background-size: 100%;
+  z-index: -1;
+  background-size: cover
+}
+
+:root {
+  --base-font-size: 15px !important;
+  --d-sidebar-row-height: 35px !important
+}
+
+#topic-title h1 {
+  font-size: 24px;
+  margin-bottom: 12px
+}
+
+.embedded-posts.bottom>div .row .topic-body .topic-meta-data .post-link-arrow {
+  bottom: 0
+}
+
+.topic-post {
+  margin-bottom: 30px
+}
+
+.topic-body {
+  flex: 1;
+  margin-left: 30px;
+  padding: 16px 24px 0 !important;
+  background: #f0f0f0 !important;
+  border-radius: 10px
+}
+
+.has-sidebar-page .sidebar-wrapper .sidebar-container {
+  background: #f5f5f5
+}
+
+.topic-avatar,
+.topic-map.--op {
+  border: none !important
+}
+
+body:not(.archetype-private_message) .topic-map {
+  padding-left: 100px
+}
+
+.custom-search-banner-wrap .btn.search-icon:not(.has-search-button-text)+.search-menu-container .search-input {
+  background: #ededed;
+  border-radius: 5px
+}
+
+.global-notice {
+  display: none
+}
+
+.list-controls .combo-box .combo-box-header {
+  background: #ededed !important;
+  border-color: #d3d3d3 !important
+}
+
+.list-container,
+.list-controls {
+  padding-right: 100px
+}
+
+.presence-users {
+  background: none !important
+}
+
+.user-content {
+  background: none !important;
+}
+
+.user-stream .item,
+.user-stream .user-stream-item,
+.user-main .about.collapsed-info .details {
+  background: none !important;
+}

src/styles/README.md

@@ -0,0 +1,5 @@
+# 插件内置论坛主题
+
+```
+@import url()
+```