diff --git a/frontend/src/views/components/SystemNotification/SystemNotification.css b/frontend/src/views/components/SystemNotification/SystemNotification.css
index c974492..b5b7bb3 100644
--- a/frontend/src/views/components/SystemNotification/SystemNotification.css
+++ b/frontend/src/views/components/SystemNotification/SystemNotification.css
@@ -221,336 +221,93 @@
 }
 
 /* Desktop manager layout: keep the authorization list and selected account settings visible together. */
+
+/* Manager layout: give the account list and selected account equal visual priority. */
 .notification-settings:has(> .notification-manager-panel) {
-  display: grid;
-  grid-template-columns: minmax(260px, 0.44fr) minmax(0, 1.56fr);
-  align-items: start;
-  gap: 8px 10px;
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
   min-width: 0;
-  padding: 12px 14px;
+  padding: 16px 18px 20px;
+}
+
+.notification-settings:has(> .notification-manager-panel) .notification-header {
+  min-height: 38px;
 }
 
 .notification-settings:has(> .notification-manager-panel) .notification-header p {
-  margin: 2px 0 0;
-  font-size: 12px;
-  line-height: 1.35;
-}
-
-.notification-settings:has(> .notification-manager-panel) .notification-header h2,
-.notification-settings:has(> .notification-manager-panel) .notification-header h3 {
-  margin-bottom: 4px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .el-alert {
-  padding: 8px 12px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .el-alert :deep(.el-alert__title) {
+  margin: 4px 0 0;
+  color: var(--el-text-color-secondary);
   font-size: 13px;
-  line-height: 1.3;
+  line-height: 1.45;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .el-alert :deep(.el-alert__description) {
-  margin-top: 2px;
-  font-size: 12px;
-  line-height: 1.35;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-header,
-.notification-settings:has(> .notification-manager-panel) > .el-alert {
-  grid-column: 1 / -1;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel {
-  grid-column: 1;
-  min-width: 0;
-  padding: 10px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel {
-  grid-column: 2;
-  min-width: 0;
-  padding: 10px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel h3 {
-  margin-bottom: 8px;
-}
-
-.notification-settings:has(> .notification-manager-panel) :deep(.el-table .cell) {
-  padding-inline: 6px;
-  font-size: 12px;
+.notification-settings:has(> .notification-manager-panel) .notification-header h2 {
+  margin-bottom: 0;
+  font-size: 24px;
   line-height: 1.25;
 }
 
-.notification-settings:has(> .notification-manager-panel) :deep(.el-table__cell) {
-  padding-block: 5px;
+.notification-settings:has(> .notification-manager-panel) > .el-alert {
+  padding: 10px 14px;
+  border-radius: 10px;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel .el-pagination {
-  margin-top: 8px;
+.notification-settings:has(> .notification-manager-panel) > .el-alert :deep(.el-alert__title) {
+  font-size: 14px;
+  line-height: 1.4;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-heading {
-  margin-bottom: 4px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-credential {
-  margin: 6px 0;
-  padding: 6px 8px;
+.notification-settings:has(> .notification-manager-panel) > .el-alert :deep(.el-alert__description) {
+  margin-top: 3px;
   font-size: 12px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns {
-  display: grid;
-  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
-  gap: 6px 10px;
-  align-items: start;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-form) {
-  grid-column: 1;
-  grid-row: 1;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions) {
-  grid-column: 1;
-  grid-row: 2;
-  min-width: 0;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) {
-  grid-column: 2;
-  grid-row: 1 / span 2;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.notification-hint) {
-  grid-column: 1;
-  grid-row: 3;
-  margin: 0;
-  font-size: 12px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions + .notification-hint) {
-  grid-column: 2;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-alert) {
-  grid-column: 1 / -1;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-form-item) {
-  margin-bottom: 6px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-form-item__label) {
-  margin-bottom: 2px;
-  font-size: 12px;
-  line-height: 1.3;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-limits {
-  gap: 6px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__header) {
-  margin-bottom: 4px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__title) {
-  font-size: 13px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__cell) {
-  padding: 4px 7px;
-  font-size: 12px;
-  line-height: 1.3;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__label) {
-  width: 96px;
-  white-space: nowrap;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-hint {
-  font-size: 11px;
-  line-height: 1.3;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel > .el-alert {
-  padding: 6px 10px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel > .el-alert :deep(.el-alert__title),
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel > .el-alert :deep(.el-alert__description) {
-  font-size: 12px;
-  line-height: 1.3;
-}
-
-@media (max-width: 920px) {
-  .notification-settings:has(> .notification-manager-panel) {
-    display: flex;
-    flex-direction: column;
-  }
-
-  .notification-settings:has(> .notification-manager-panel) > .notification-panel {
-    width: 100%;
-    box-sizing: border-box;
-  }
-
-  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns {
-    display: flex;
-    flex-direction: column;
-  }
-
-  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > * {
-    width: 100%;
-    box-sizing: border-box;
-  }
-}
-
-
-.notification-settings:has(> .notification-manager-panel) {
-  gap: 6px 8px;
-  padding: 8px 10px;
+  line-height: 1.45;
 }
 
 .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel,
 .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel {
-  padding: 8px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel h3,
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel h3 {
-  margin-bottom: 4px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns {
-  gap: 4px 8px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-form-item) {
-  margin-bottom: 4px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-form-item__label) {
-  margin-bottom: 1px;
-  font-size: 11px;
-  line-height: 1.2;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-limits {
-  gap: 4px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-actions {
-  gap: 4px;
-  margin-top: 2px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-actions :deep(.el-button) {
-  min-height: 28px;
-  padding: 5px 10px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__header) {
-  margin-bottom: 2px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__title) {
-  font-size: 12px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__cell) {
-  padding: 3px 5px;
-  font-size: 11px;
-  line-height: 1.2;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__label) {
-  width: 88px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-hint {
-  margin: 2px 0;
-  font-size: 10px;
-  line-height: 1.2;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel > .el-alert {
-  padding: 4px 8px;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel > .el-alert :deep(.el-alert__title),
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel > .el-alert :deep(.el-alert__description) {
-  font-size: 11px;
-  line-height: 1.2;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .el-alert :deep(.el-alert__description) {
-  display: none;
-}
-
-.notification-settings:has(> .notification-manager-panel) .notification-header p {
-  display: none;
-}
-
-/* The SMTP table is a dense read-only summary, so pair two records per row on desktop. */
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table {
-  display: block;
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody {
-  display: grid;
-  grid-template-columns: repeat(2, minmax(0, 1fr));
-}
-
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody > tr {
-  display: grid;
-  grid-template-columns: 96px minmax(0, 1fr);
+  width: 100%;
   min-width: 0;
+  box-sizing: border-box;
+  padding: 16px;
+  border-radius: 14px;
+  background: var(--el-bg-color);
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody > tr > td {
-  min-width: 0;
-  overflow-wrap: break-word;
-  word-break: normal;
+.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel {
+  display: flex;
+  align-items: center;
+  gap: 16px;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) code {
-  overflow-wrap: break-word;
-  word-break: normal;
-  white-space: normal;
+.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel h3 {
+  flex: 0 0 auto;
+  min-width: 132px;
+  margin: 0;
+  font-size: 16px;
+  line-height: 1.4;
 }
 
-@media (max-width: 920px) {
-  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table {
-    display: table;
-  }
-
-  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody {
-    display: table-row-group;
-  }
-
-  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody > tr {
-    display: table-row;
-  }
-}
-/* Keep the manager table and SMTP summary inside the available dialog width. */
-.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table),
-.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table__header-wrapper table),
-.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table__body-wrapper table) {
+.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table) {
+  flex: 1 1 auto;
   width: 100% !important;
   min-width: 0 !important;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table table) {
   table-layout: fixed;
 }
 
 .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table col:nth-child(1)) {
-  width: 26% !important;
+  width: 22% !important;
 }
 
 .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table col:nth-child(2)) {
-  width: 24% !important;
+  width: 30% !important;
 }
 
 .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table col:nth-child(3)) {
@@ -558,51 +315,220 @@
 }
 
 .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table col:nth-child(4)) {
-  width: 22% !important;
+  width: 20% !important;
 }
 
 .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table .cell) {
   min-width: 0;
-  padding-inline: 3px;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-  font-size: 11px;
+  padding-inline: 8px;
+  overflow-wrap: anywhere;
+  white-space: normal;
+  font-size: 13px;
+  line-height: 1.35;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table__cell) {
+  padding-block: 8px;
 }
 
 .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table .el-tag) {
   max-width: 100%;
-  overflow: hidden;
-  text-overflow: ellipsis;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions) {
+.notification-settings:has(> .notification-manager-panel) > .notification-manager-panel .el-pagination {
+  flex: 0 0 auto;
+  margin-top: 0;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel {
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-heading {
+  margin: 0;
+  padding-bottom: 12px;
+  border-bottom: 1px solid var(--el-border-color-lighter);
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-heading h3 {
+  margin: 0;
+  font-size: 18px;
+  line-height: 1.4;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-credential {
+  margin: 0;
+  padding: 10px 12px;
+  border-radius: 10px;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns {
+  display: grid;
+  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
+  gap: 16px;
+  align-items: start;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-control-column,
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-service-column {
+  min-width: 0;
+  padding: 14px;
+  border: 1px solid var(--el-border-color-lighter);
+  border-radius: 12px;
+  background: var(--el-fill-color-blank);
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-control-column {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-control-column > :deep(.el-form) {
+  padding-bottom: 14px;
+  border-bottom: 1px solid var(--el-border-color-lighter);
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-form-item) {
+  margin-bottom: 12px;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-form-item__label) {
+  margin-bottom: 5px;
+  color: var(--el-text-color-primary);
+  font-size: 13px;
+  line-height: 1.35;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-limits {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-input-number) {
   width: 100%;
-  max-width: 100%;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-actions {
+  gap: 8px;
+  margin: 0;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-actions :deep(.el-button + .el-button) {
+  margin-left: 0;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-usage-block {
   min-width: 0;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions__body),
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions__table) {
-  width: 100%;
-  max-width: 100%;
-  min-width: 0;
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-service-column :deep(.el-descriptions__header),
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-usage-block :deep(.el-descriptions__header) {
+  margin-bottom: 10px;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody,
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody > tr {
-  min-width: 0;
-  width: 100%;
-  max-width: 100%;
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__title) {
+  color: var(--el-text-color-primary);
+  font-size: 15px;
+  line-height: 1.4;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) .el-descriptions__body > table > tbody > tr > td {
-  min-width: 0;
-  max-width: 100%;
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__table) {
+  table-layout: fixed;
 }
 
-.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns > :deep(.el-descriptions ~ .el-descriptions) code {
-  display: inline;
-  max-width: 100%;
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__label) {
+  width: 132px;
+  color: var(--el-text-color-secondary);
+  white-space: nowrap;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__cell) {
+  min-width: 0;
+  padding: 9px 10px;
+  overflow-wrap: anywhere;
+  font-size: 13px;
+  line-height: 1.45;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel :deep(.el-descriptions__content) {
+  min-width: 0;
   overflow-wrap: anywhere;
 }
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-hint {
+  margin: 10px 0 0;
+  font-size: 12px;
+  line-height: 1.55;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-send-only-alert {
+  grid-column: 1 / -1;
+  margin: 0;
+}
+
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-send-only-alert :deep(.el-alert__title),
+.notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-send-only-alert :deep(.el-alert__description) {
+  line-height: 1.5;
+}
+
+@media (max-width: 980px) {
+  .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel {
+    align-items: stretch;
+    flex-wrap: wrap;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel h3 {
+    width: 100%;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table) {
+    flex-basis: 100%;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel .el-pagination {
+    margin-left: auto;
+  }
+}
+
+@media (max-width: 820px) {
+  .notification-settings:has(> .notification-manager-panel) {
+    padding: 12px;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel,
+  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel {
+    padding: 12px;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-columns {
+    grid-template-columns: 1fr;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-send-only-alert {
+    grid-column: auto;
+  }
+}
+
+@media (max-width: 560px) {
+  .notification-settings:has(> .notification-manager-panel) .notification-header {
+    align-items: flex-start;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) .notification-header :deep(.el-button) {
+    align-self: flex-start;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-detail-panel .notification-limits {
+    grid-template-columns: 1fr;
+    gap: 0;
+  }
+
+  .notification-settings:has(> .notification-manager-panel) > .notification-manager-panel :deep(.el-table .cell) {
+    padding-inline: 4px;
+    font-size: 12px;
+  }
+}
\ No newline at end of file
diff --git a/frontend/src/views/components/SystemNotification/SystemNotification.vue b/frontend/src/views/components/SystemNotification/SystemNotification.vue
index 3c4c18a..943c560 100644
--- a/frontend/src/views/components/SystemNotification/SystemNotification.vue
+++ b/frontend/src/views/components/SystemNotification/SystemNotification.vue
@@ -79,6 +79,7 @@
         </div>
 
         <div class="notification-columns">
+          <div class="notification-control-column">
         <el-form v-if="canManage" label-position="top" :disabled="submitting || loading" @submit.prevent="save">
           <el-form-item label="允许该账号通过 SMTP 发送系统通知">
             <el-switch v-model="form.enabled" active-text="开启" inactive-text="关闭" />
@@ -100,13 +101,17 @@
           </div>
         </el-form>
 
+        <div class="notification-usage-block">
         <el-descriptions title="使用状态" :column="1" border>
           <el-descriptions-item label="本分钟用量">{{ status.minute_used }} / {{ status.minute_limit }} 个收件人</el-descriptions-item>
           <el-descriptions-item label="今日用量（UTC）">{{ status.day_used }} / {{ status.day_limit }} 个收件人</el-descriptions-item>
           <el-descriptions-item label="单封限制">最多 {{ status.max_recipients }} 个收件人，最大 {{ status.max_message_bytes / 1048576 }} MiB</el-descriptions-item>
         </el-descriptions>
         <p class="notification-hint">配额按提交的收件人数计算，失败和重试也计数；更换凭据或重启不会清空配额。</p>
+        </div>
+        </div>
 
+        <div class="notification-service-column">
         <el-descriptions title="应用 SMTP 配置" :column="1" border>
           <el-descriptions-item label="服务器">{{ status.host }}</el-descriptions-item>
           <el-descriptions-item label="隐式 TLS 端口">{{ status.tls_port || '未启用' }}</el-descriptions-item>
@@ -117,7 +122,8 @@
           <el-descriptions-item label="发件名称">{{ status.sender_name }}（服务端固定）</el-descriptions-item>
         </el-descriptions>
         <p class="notification-hint">必须启用加密和证书校验。服务器名需正确解析且由证书覆盖；此处显示配置，不代表公网连通性已验收。</p>
-        <el-alert title="仅发信，不提供收件箱" description="通知地址拒收邮件；通知凭据不能用于网页登录、IMAP 或 POP3。普通邮箱及其原有凭据不受影响。" type="warning" :closable="false" show-icon />
+        </div>
+        <el-alert class="notification-send-only-alert" title="仅发信，不提供收件箱" description="通知地址拒收邮件；通知凭据不能用于网页登录、IMAP 或 POP3。普通邮箱及其原有凭据不受影响。" type="warning" :closable="false" show-icon />
         </div>
       </template>
       <el-empty v-else-if="!loading && !error" description="尚未读取账号状态" />