diff --git a/app/src/renderer/src/App.vue b/app/src/renderer/src/App.vue
index 350388f..669d14d 100644
--- a/app/src/renderer/src/App.vue
+++ b/app/src/renderer/src/App.vue
@@ -172,7 +172,38 @@ function handleSwitchTab(tab) {
   </n-config-provider>
 </template>
 
-<style>
+<style lang="less">
+:root {
+  --frost-primary-color: #0ea5a0;
+  --frost-primary-color-hover: #0b8c87;
+  --frost-primary-color-pressed: #0b8c87;
+  --frost-primary-color-suppl: #0ea5a0;
+  --frost-success-color: #22c55e;
+  --frost-success-color-hover: #16a34a;
+  --frost-success-color-pressed: #15803d;
+  --frost-success-color-suppl: #22c55e;
+  --frost-warning-color: #f59e0b;
+  --frost-warning-color-hover: #d97706;
+  --frost-warning-color-pressed: #b45309;
+  --frost-warning-color-suppl: #f59e0b;
+  --frost-error-color: #ef4444;
+  --frost-error-color-hover: #dc2626;
+  --frost-error-color-pressed: #b91c1c;
+  --frost-error-color-suppl: #ef4444;
+  --frost-info-color: #3b82f6;
+  --frost-info-color-hover: #2563eb;
+  --frost-info-color-pressed: #1d4ed8;
+  --frost-info-color-suppl: #3b82f6;
+  --frost-color-text-tertiary: #999;
+  --frost-color-topic: #d25a00;
+  --frost-color-bg-light: #f5f7fa;
+  --frost-color-bg-item: #fafafa;
+  --frost-shadow-black-4: rgba(0, 0, 0, 0.04);
+  --frost-shadow-black-6: rgba(0, 0, 0, 0.06);
+  --frost-shadow-black-8: rgba(0, 0, 0, 0.08);
+  --frost-shadow-black-12: rgba(0, 0, 0, 0.12);
+}
+
 html, body, #app {
   margin: 0;
   padding: 0;
@@ -189,12 +220,12 @@ html, body, #app {
   padding: 0 0 16px 0;
   height: calc(100vh - 50px);
   overflow: hidden;
-}
 
-.dashboard-content {
-  display: flex;
-  flex-direction: column;
-  overflow: hidden;
+  &.dashboard-content {
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+  }
 }
 
 .dashboard-scroll-wrapper {
@@ -210,29 +241,27 @@ html, body, #app {
   gap: 12px;
   height: 100%;
   min-width: 0;
-}
 
-.publish-panel,
-.messages-panel {
-  min-width: 0;
-  min-height: 0;
-}
+  .publish-panel,
+  .messages-panel {
+    min-width: 0;
+    min-height: 0;
+  }
 
-.publish-panel {
-  box-sizing: border-box;
-  height: 100%;
-  min-height: 0;
-  overflow: hidden;
-}
+  .publish-panel {
+    box-sizing: border-box;
+    height: 100%;
+    min-height: 0;
+    overflow: hidden;
+  }
 
-.messages-panel {
-  height: 100%;
-  min-height: 0;
-  overflow: hidden;
-}
+  .messages-panel {
+    height: 100%;
+    min-height: 0;
+    overflow: hidden;
+  }
 
-@media (max-width: 900px) {
-  .message-center-layout {
+  @media (max-width: 900px) {
     grid-template-columns: 1fr;
   }
 }
@@ -242,22 +271,27 @@ html, body, #app {
   scrollbar-width: thin;
   scrollbar-color: rgba(144, 147, 153, 0.5) transparent;
 }
+
 ::-webkit-scrollbar {
   width: 8px;
   height: 8px;
-}
-::-webkit-scrollbar-track {
-  background-color: transparent;
-}
-::-webkit-scrollbar-thumb {
-  background-color: rgba(144, 147, 153, 0.5);
-  border-radius: 4px;
-}
-::-webkit-scrollbar-thumb:hover {
-  background-color: rgba(144, 147, 153, 0.8);
-}
-::-webkit-scrollbar-corner {
-  display: none;
-  background-color: transparent;
+
+  &-track {
+    background-color: transparent;
+  }
+
+  &-thumb {
+    background-color: rgba(144, 147, 153, 0.5);
+    border-radius: 4px;
+
+    &:hover {
+      background-color: rgba(144, 147, 153, 0.8);
+    }
+  }
+
+  &-corner {
+    display: none;
+    background-color: transparent;
+  }
 }
 </style>
diff --git a/app/src/renderer/src/components/Sidebar.vue b/app/src/renderer/src/components/Sidebar.vue
index 471b540..9d8b216 100644
--- a/app/src/renderer/src/components/Sidebar.vue
+++ b/app/src/renderer/src/components/Sidebar.vue
@@ -216,7 +216,7 @@ async function handleImportFile(event) {
   </n-layout-sider>
 </template>
 
-<style scoped>
+<style scoped lang="less">
 :deep(.sidebar-scroll-container) {
   height: 100%;
   overflow: hidden !important;
@@ -242,7 +242,7 @@ async function handleImportFile(event) {
 .sidebar-logo {
   width: 32px;
   height: 32px;
-  background: #0ea5a0;
+  background: var(--frost-primary-color);
   border-radius: 6px;
   display: flex;
   align-items: center;
@@ -278,15 +278,19 @@ async function handleImportFile(event) {
   margin-bottom: 4px;
   border: 1px solid transparent;
   transition: all 0.15s;
-}
 
-.server-item:hover {
-  background: var(--n-color-hover);
-}
+  &:hover {
+    background: var(--n-color-hover);
 
-.server-item.active {
-  background: var(--n-color-pressed);
-  border-color: #0ea5a0;
+    .server-actions {
+      opacity: 1;
+    }
+  }
+
+  &.active {
+    background: var(--n-color-pressed);
+    border-color: var(--frost-primary-color);
+  }
 }
 
 .server-item-top {
@@ -310,23 +314,19 @@ async function handleImportFile(event) {
   transition: opacity 0.15s;
 }
 
-.server-item:hover .server-actions {
-  opacity: 1;
-}
-
 .server-url {
   margin-top: 4px;
   overflow: hidden;
-}
 
-.server-url :deep(.n-tag) {
-  max-width: 100%;
-}
+  :deep(.n-tag) {
+    max-width: 100%;
+  }
 
-.server-url :deep(.n-tag__content) {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
+  :deep(.n-tag__content) {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
 }
 
 .server-bottom {
@@ -347,23 +347,23 @@ async function handleImportFile(event) {
   height: 6px;
   border-radius: 50%;
   margin-right: 2px;
-}
 
-.status-dot.connected {
-  background: #22c55e;
-}
+  &.connected {
+    background: var(--frost-success-color);
+  }
 
-.status-dot.connecting {
-  background: #f59e0b;
-  animation: pulse 1s infinite;
-}
+  &.connecting {
+    background: var(--frost-warning-color);
+    animation: pulse 1s infinite;
+  }
 
-.status-dot.disconnected {
-  background: #999;
-}
+  &.disconnected {
+    background: var(--frost-color-text-tertiary);
+  }
 
-.status-dot.error {
-  background: #ef4444;
+  &.error {
+    background: var(--frost-error-color);
+  }
 }
 
 @keyframes pulse {
diff --git a/app/src/renderer/src/views/Dashboard.vue b/app/src/renderer/src/views/Dashboard.vue
index d416331..9eb59a3 100644
--- a/app/src/renderer/src/views/Dashboard.vue
+++ b/app/src/renderer/src/views/Dashboard.vue
@@ -189,25 +189,27 @@ async function handleToggleConnection(srv) {
   </div>
 </template>
 
-<style scoped>
+<style scoped lang="less">
 .dashboard {
   max-width: 900px;
 }
 
-.server-descriptions :deep(.n-descriptions-table) {
-  table-layout: fixed;
-  width: 100%;
-}
+.server-descriptions {
+  :deep(.n-descriptions-table) {
+    table-layout: fixed;
+    width: 100%;
+  }
 
-.server-descriptions :deep(.n-descriptions-table-header),
-.server-descriptions :deep(.n-descriptions-table-content) {
-  width: 25%;
-}
+  :deep(.n-descriptions-table-header),
+  :deep(.n-descriptions-table-content) {
+    width: 25%;
+  }
 
-.server-descriptions :deep(.n-descriptions-table-content) {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
+  :deep(.n-descriptions-table-content) {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
 }
 
 .status-dot {
@@ -215,23 +217,23 @@ async function handleToggleConnection(srv) {
   width: 8px;
   height: 8px;
   border-radius: 50%;
-}
 
-.status-dot.connected {
-  background: #22c55e;
-}
+  &.connected {
+    background: var(--frost-success-color);
+  }
 
-.status-dot.connecting {
-  background: #f59e0b;
-  animation: pulse 1s infinite;
-}
+  &.connecting {
+    background: var(--frost-warning-color);
+    animation: pulse 1s infinite;
+  }
 
-.status-dot.disconnected {
-  background: #999;
-}
+  &.disconnected {
+    background: var(--frost-color-text-tertiary);
+  }
 
-.status-dot.error {
-  background: #ef4444;
+  &.error {
+    background: var(--frost-error-color);
+  }
 }
 
 @keyframes pulse {
diff --git a/app/src/renderer/src/views/Messages.vue b/app/src/renderer/src/views/Messages.vue
index c731fd6..f49e330 100644
--- a/app/src/renderer/src/views/Messages.vue
+++ b/app/src/renderer/src/views/Messages.vue
@@ -154,29 +154,29 @@ function formatPayload(payload) {
 
 </template>
 
-<style scoped>
+<style scoped lang="less">
 .messages-view {
   width: 100%;
   height: 100%;
   min-width: 0;
   min-height: 0;
-}
 
-.messages-view :deep(.n-card) {
-  display: flex;
-  flex-direction: column;
-  height: 100%;
-  min-height: 0;
-}
+  :deep(.n-card) {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    min-height: 0;
+  }
 
-.messages-view :deep(.n-card__content) {
-  flex: 1 1 auto;
-  min-height: 0;
-  overflow: hidden;
+  :deep(.n-card__content) {
+    flex: 1 1 auto;
+    min-height: 0;
+    overflow: hidden;
+  }
 }
 
 .msg-log {
-  background: #f5f7fa;
+  background: var(--frost-color-bg-light);
   border-radius: 6px;
   padding: 12px;
   height: 100%;
@@ -192,7 +192,7 @@ function formatPayload(payload) {
 
 .msg-entry {
   padding: 8px 0;
-  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
+  border-bottom: 1px solid var(--frost-shadow-black-6);
 }
 
 .msg-header {
@@ -203,45 +203,51 @@ function formatPayload(payload) {
 }
 
 .msg-time {
-  color: #999;
+  color: var(--frost-color-text-tertiary);
   flex-shrink: 0;
 }
+
 .msg-dir {
   flex-shrink: 0;
   font-weight: 700;
   width: 28px;
+
+  &.pub {
+    color: var(--frost-info-color);
+  }
+
+  &.sub {
+    color: var(--frost-success-color);
+  }
 }
-.msg-dir.pub {
-  color: #3b82f6;
-}
-.msg-dir.sub {
-  color: #22c55e;
-}
+
 .msg-topic {
-  color: #d25a00;
+  color: var(--frost-color-topic);
   min-width: 0;
   flex: 1;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
   cursor: pointer;
+
+  &:hover {
+    text-decoration: underline;
+  }
 }
 
-.msg-topic:hover {
-  text-decoration: underline;
-}
 .msg-payload {
   margin: 6px 0 0;
   padding: 8px 10px;
   border-radius: 4px;
-  background: rgba(0, 0, 0, 0.04);
+  background: var(--frost-shadow-black-4);
   color: #333;
   font: inherit;
   white-space: pre-wrap;
   overflow-wrap: anywhere;
 }
+
 .msg-meta {
-  color: #999;
+  color: var(--frost-color-text-tertiary);
   font-size: 11px;
   flex-shrink: 0;
 }
diff --git a/app/src/renderer/src/views/Publish.vue b/app/src/renderer/src/views/Publish.vue
index 3f57761..ab17bed 100644
--- a/app/src/renderer/src/views/Publish.vue
+++ b/app/src/renderer/src/views/Publish.vue
@@ -299,7 +299,7 @@ async function copyTopic(topic) {
 
 </template>
 
-<style scoped>
+<style scoped lang="less">
 .publish-view {
   display: flex;
   flex-direction: column;
@@ -307,61 +307,61 @@ async function copyTopic(topic) {
   height: 100%;
   min-width: 0;
   min-height: 0;
-}
 
-.publish-view :deep(.n-tabs) {
-  display: flex;
-  flex-direction: column;
-  height: 100%;
-  min-height: 0;
-}
+  :deep(.n-tabs) {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    min-height: 0;
+  }
 
-.publish-view :deep(.n-tabs-nav) {
-  flex-shrink: 0;
-}
+  :deep(.n-tabs-nav) {
+    flex-shrink: 0;
+  }
 
-.publish-view :deep(.n-tabs-pane-wrapper) {
-  flex: 1 1 auto;
-  min-height: 0;
-  overflow: hidden;
-}
+  :deep(.n-tabs-pane-wrapper) {
+    flex: 1 1 auto;
+    min-height: 0;
+    overflow: hidden;
+  }
 
-.publish-view :deep(.n-tabs-tab-panels),
-.publish-view :deep(.n-tabs-pane-wrapper) {
-  height: 100%;
-  min-height: 0;
-}
+  :deep(.n-tabs-tab-panels),
+  :deep(.n-tabs-pane-wrapper) {
+    height: 100%;
+    min-height: 0;
+  }
 
-.publish-view :deep(.n-tab-pane) {
-  box-sizing: border-box;
-  height: 100%;
-  min-height: 0;
-}
+  :deep(.n-tab-pane) {
+    box-sizing: border-box;
+    height: 100%;
+    min-height: 0;
+  }
 
-.publish-view :deep(.n-tab-pane > .n-card) {
-  display: flex;
-  flex-direction: column;
-  height: 100%;
-  min-height: 0;
-}
+  :deep(.n-tab-pane > .n-card) {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    min-height: 0;
+  }
 
-.publish-view :deep(.n-card__content) {
-  flex: 1 1 auto;
-  min-height: 0;
-  overflow: hidden;
-}
+  :deep(.n-card__content) {
+    flex: 1 1 auto;
+    min-height: 0;
+    overflow: hidden;
 
-.publish-view :deep(.n-card__content > div) {
-  height: 100%;
-  min-height: 0;
+    > div {
+      height: 100%;
+      min-height: 0;
+    }
+  }
 }
 
 .topic-field {
   width: 100%;
-}
 
-.topic-field :deep(.n-form-item-blank) {
-  width: 100%;
+  :deep(.n-form-item-blank) {
+    width: 100%;
+  }
 }
 
 .publish-form {
@@ -369,34 +369,34 @@ async function copyTopic(topic) {
   flex-direction: column;
   height: 100%;
   min-height: 0;
-}
 
-.publish-form .payload-field {
-  flex: 1;
-  min-height: 0;
-  display: flex;
-  flex-direction: column;
-}
+  .payload-field {
+    flex: 1;
+    min-height: 0;
+    display: flex;
+    flex-direction: column;
 
-.publish-form .payload-field :deep(.n-form-item-blank) {
-  flex: 1;
-  min-height: 0;
-}
+    :deep(.n-form-item-blank) {
+      flex: 1;
+      min-height: 0;
+    }
 
-.publish-form .payload-field :deep(.n-input) {
-  height: 100%;
-}
+    :deep(.n-input) {
+      height: 100%;
+    }
 
-.publish-form .payload-field :deep(.n-input__textarea-el),
-.publish-form .payload-field :deep(textarea) {
-  resize: none !important;
-  height: 100% !important;
-  min-height: 0 !important;
-  font-family: monospace;
+    :deep(.n-input__textarea-el),
+    :deep(textarea) {
+      resize: none !important;
+      height: 100% !important;
+      min-height: 0 !important;
+      font-family: monospace;
+    }
+  }
 }
 
 .msg-log {
-  background: #f5f7fa;
+  background: var(--frost-color-bg-light);
   border-radius: 6px;
   padding: 12px;
   height: 100%;
@@ -411,7 +411,7 @@ async function copyTopic(topic) {
 
 .msg-entry {
   padding: 8px 0;
-  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
+  border-bottom: 1px solid var(--frost-shadow-black-6);
 }
 
 .msg-header {
@@ -422,7 +422,7 @@ async function copyTopic(topic) {
 }
 
 .msg-time {
-  color: #999;
+  color: var(--frost-color-text-tertiary);
   flex-shrink: 0;
 }
 
@@ -430,31 +430,31 @@ async function copyTopic(topic) {
   flex-shrink: 0;
   font-weight: 700;
   width: 28px;
-}
 
-.msg-dir.pub {
-  color: #3b82f6;
+  &.pub {
+    color: var(--frost-info-color);
+  }
 }
 
 .msg-topic {
-  color: #d25a00;
+  color: var(--frost-color-topic);
   min-width: 0;
   flex: 1;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
   cursor: pointer;
-}
 
-.msg-topic:hover {
-  text-decoration: underline;
+  &:hover {
+    text-decoration: underline;
+  }
 }
 
 .msg-payload {
   margin: 6px 0 0;
   padding: 8px 10px;
   border-radius: 4px;
-  background: rgba(0, 0, 0, 0.04);
+  background: var(--frost-shadow-black-4);
   color: #333;
   font: inherit;
   white-space: pre-wrap;
@@ -462,7 +462,7 @@ async function copyTopic(topic) {
 }
 
 .msg-meta {
-  color: #999;
+  color: var(--frost-color-text-tertiary);
   font-size: 11px;
   flex-shrink: 0;
 }
diff --git a/app/src/renderer/src/views/QuickSend.vue b/app/src/renderer/src/views/QuickSend.vue
index 133dec5..f13f8c3 100644
--- a/app/src/renderer/src/views/QuickSend.vue
+++ b/app/src/renderer/src/views/QuickSend.vue
@@ -664,7 +664,7 @@ onUnmounted(() => {
 
 </template>
 
-<style scoped>
+<style scoped lang="less">
 .quick-send-view {
   display: flex;
   flex-direction: column;
@@ -672,19 +672,19 @@ onUnmounted(() => {
   height: 100%;
   min-width: 0;
   min-height: 0;
-}
 
-.quick-send-view :deep(.n-card) {
-  display: flex;
-  flex-direction: column;
-  height: 100%;
-  min-height: 0;
-}
+  :deep(.n-card) {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    min-height: 0;
+  }
 
-.quick-send-view :deep(.n-card__content) {
-  flex: 1 1 auto;
-  min-height: 0;
-  overflow: hidden;
+  :deep(.n-card__content) {
+    flex: 1 1 auto;
+    min-height: 0;
+    overflow: hidden;
+  }
 }
 
 .quick-list {
@@ -696,18 +696,18 @@ onUnmounted(() => {
   gap: 12px;
   padding-right: 4px;
   align-content: start;
-}
 
-.quick-list.columns-1 {
-  grid-template-columns: 1fr;
-}
+  &.columns-1 {
+    grid-template-columns: 1fr;
+  }
 
-.quick-list.columns-2 {
-  grid-template-columns: repeat(2, 1fr);
-}
+  &.columns-2 {
+    grid-template-columns: repeat(2, 1fr);
+  }
 
-.quick-list.columns-3 {
-  grid-template-columns: repeat(3, 1fr);
+  &.columns-3 {
+    grid-template-columns: repeat(3, 1fr);
+  }
 }
 
 .payload-field {
@@ -715,29 +715,29 @@ onUnmounted(() => {
   flex-direction: column;
   gap: 8px;
   width: 100%;
-}
 
-.payload-field :deep(.n-input) {
-  width: 100%;
-}
+  :deep(.n-input) {
+    width: 100%;
+  }
 
-.payload-field .n-button {
-  align-self: flex-end;
+  .n-button {
+    align-self: flex-end;
+  }
 }
 
 .quick-item {
-  border: 1px solid rgba(0, 0, 0, 0.08);
+  border: 1px solid var(--frost-shadow-black-8);
   border-radius: 6px;
   padding: 12px;
-  background: #fafafa;
+  background: var(--frost-color-bg-item);
   cursor: grab;
   transition: box-shadow 0.2s, opacity 0.2s;
-}
 
-.quick-item.dragging {
-  opacity: 0.6;
-  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
-  cursor: grabbing;
+  &.dragging {
+    opacity: 0.6;
+    box-shadow: 0 4px 12px var(--frost-shadow-black-12);
+    cursor: grabbing;
+  }
 }
 
 .quick-header {
@@ -751,11 +751,11 @@ onUnmounted(() => {
 .quick-checkbox {
   flex-shrink: 0;
   margin-top: 2px;
-}
 
-.quick-checkbox :deep(.n-checkbox-box) {
-  width: 16px;
-  height: 16px;
+  :deep(.n-checkbox-box) {
+    width: 16px;
+    height: 16px;
+  }
 }
 
 .quick-topic-wrap {
@@ -772,14 +772,14 @@ onUnmounted(() => {
   font-weight: 700;
   width: 28px;
   font-size: 12px;
-}
 
-.quick-dir.pub {
-  color: #3b82f6;
+  &.pub {
+    color: var(--frost-info-color);
+  }
 }
 
 .quick-topic {
-  color: #d25a00;
+  color: var(--frost-color-topic);
   min-width: 0;
   flex: 1;
   overflow: hidden;
@@ -788,14 +788,14 @@ onUnmounted(() => {
   cursor: pointer;
   font-family: monospace;
   font-size: 13px;
-}
 
-.quick-topic:hover {
-  text-decoration: underline;
+  &:hover {
+    text-decoration: underline;
+  }
 }
 
 .quick-meta {
-  color: #999;
+  color: var(--frost-color-text-tertiary);
   font-size: 11px;
   flex-shrink: 0;
   font-family: monospace;
@@ -805,7 +805,7 @@ onUnmounted(() => {
   margin: 10px 0 0;
   padding: 8px 10px;
   border-radius: 4px;
-  background: rgba(0, 0, 0, 0.04);
+  background: var(--frost-shadow-black-4);
   color: #333;
   font: inherit;
   white-space: pre-wrap;
@@ -817,23 +817,27 @@ onUnmounted(() => {
   overflow-y: auto;
 }
 
-.quick-send-modal .n-form-item {
-  margin-bottom: 20px;
+.quick-send-modal {
+  .n-form-item {
+    margin-bottom: 20px;
+
+    &__label {
+      margin-bottom: 8px;
+    }
+
+    &:last-child {
+      margin-bottom: 0;
+    }
+  }
+
+  .n-grid {
+    margin-bottom: 20px;
+  }
 }
 
-.quick-send-modal .n-form-item__label {
-  margin-bottom: 8px;
-}
-
-.quick-send-modal .n-form-item:last-child {
-  margin-bottom: 0;
-}
-
-.quick-send-modal .n-grid {
-  margin-bottom: 20px;
-}
-
-.quick-send-dialog .n-dialog__icon {
-  color: #0ea5a0;
+.quick-send-dialog {
+  :deep(.n-dialog__icon) {
+    color: var(--frost-primary-color);
+  }
 }
 </style>
diff --git a/app/src/renderer/src/views/Subscribe.vue b/app/src/renderer/src/views/Subscribe.vue
index 68fe91e..687fbf7 100644
--- a/app/src/renderer/src/views/Subscribe.vue
+++ b/app/src/renderer/src/views/Subscribe.vue
@@ -426,7 +426,7 @@ async function handleEditSave(t) {
 
 </template>
 
-<style scoped>
+<style scoped lang="less">
 .subscribe-view {
   display: flex;
   flex-direction: column;
@@ -479,10 +479,12 @@ async function handleEditSave(t) {
   flex: 0 0 auto;
 }
 
-.topic-field :deep(.n-form-item-blank),
-.qos-field :deep(.n-form-item-blank),
-.comment-field :deep(.n-form-item-blank) {
-  width: 100%;
+.topic-field,
+.qos-field,
+.comment-field {
+  :deep(.n-form-item-blank) {
+    width: 100%;
+  }
 }
 
 .topic-item {
@@ -491,14 +493,14 @@ async function handleEditSave(t) {
   min-height: 56px;
   padding-top: 0 !important;
   padding-bottom: 0 !important;
-}
 
-.topic-item :deep(.n-list-item__main) {
-  display: flex;
-  align-items: center;
-  height: 100%;
-  min-width: 0;
-  gap: 12px;
+  :deep(.n-list-item__main) {
+    display: flex;
+    align-items: center;
+    height: 100%;
+    min-width: 0;
+    gap: 12px;
+  }
 }
 
 .topic-content {
@@ -526,10 +528,10 @@ async function handleEditSave(t) {
   font-size: 13px;
   overflow: hidden;
   visibility: visible;
-}
 
-.topic-name.is-hidden {
-  visibility: hidden;
+  &.is-hidden {
+    visibility: hidden;
+  }
 }
 
 .topic-label {
@@ -554,19 +556,19 @@ async function handleEditSave(t) {
   color: var(--n-text-color-3);
   font-size: 11px;
   line-height: 16px;
-}
 
-.topic-comment-prefix {
-  flex-shrink: 0;
-  color: #0f766e;
-}
+  &-prefix {
+    flex-shrink: 0;
+    color: #0f766e;
+  }
 
-.topic-comment-text {
-  flex: 1;
-  min-width: 0;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
+  &-text {
+    flex: 1;
+    min-width: 0;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
 }
 
 .topic-qos-tag {
@@ -577,23 +579,23 @@ async function handleEditSave(t) {
 .topic-actions {
   flex-shrink: 0;
   visibility: visible;
-}
 
-.topic-actions.is-hidden {
-  visibility: hidden;
-  pointer-events: none;
-}
+  &.is-hidden {
+    visibility: hidden;
+    pointer-events: none;
+  }
 
-.topic-actions .n-button {
-  min-width: 40px;
-}
+  .n-button {
+    min-width: 40px;
+  }
 
-.topic-actions .topic-action-sub {
-  min-width: auto;
-}
+  .topic-action-sub {
+    min-width: auto;
+  }
 
-.topic-actions .topic-action-remove {
-  min-width: 24px;
+  .topic-action-remove {
+    min-width: 24px;
+  }
 }
 
 .topic-edit-row {
@@ -609,11 +611,11 @@ async function handleEditSave(t) {
   overflow: hidden;
   visibility: hidden;
   pointer-events: none;
-}
 
-.topic-edit-row.is-visible {
-  visibility: visible;
-  pointer-events: auto;
+  &.is-visible {
+    visibility: visible;
+    pointer-events: auto;
+  }
 }
 
 .topic-edit-topic {