perf: 优化网络测试页面，夜间模式显示效果

packages/ui/certd-client/src/views/sys/nettest/DomainTestCard.vue

@@ -221,14 +221,12 @@ onMounted(() => {
   border: 1px solid #e8e8e8;
   border-radius: 4px;
   overflow: hidden;
-  background-color: #fff;
 
   .card-header {
     display: flex;
     justify-content: space-between;
     align-items: center;
     padding: 12px 16px;
-    background-color: #fafafa;
     border-bottom: 1px solid #e8e8e8;
   }
 
@@ -245,13 +243,11 @@ onMounted(() => {
   .input-form {
     margin-bottom: 12px;
     padding: 12px;
-    background-color: #fafafa;
     border-radius: 4px;
   }
 
   .domain-info {
     padding: 5.5px 12px;
-    background-color: #f0f0f0;
     border-radius: 4px;
     display: flex;
     gap: 16px;
@@ -272,7 +268,6 @@ onMounted(() => {
   .summary {
     margin-top: 16px;
     padding: 12px;
-    background-color: #f8f9fa;
     border-radius: 4px;
     .summary-text {
     }

packages/ui/certd-client/src/views/sys/nettest/ServerInfoCard.vue

@@ -110,7 +110,6 @@ onMounted(() => {
   }
 
   .info-item {
-    background-color: #fafafa;
     border-radius: 4px;
     padding: 12px;
 

packages/ui/certd-client/src/views/sys/nettest/TestCase.vue

@@ -138,7 +138,6 @@ const resultError = computed(() => {
 .port-info {
   font-size: 12px;
   color: #999;
-  background-color: #f0f0f0;
   padding: 2px 6px;
   border-radius: 3px;
   margin-right: 8px;
@@ -154,7 +153,6 @@ const resultError = computed(() => {
   .error-message,
   .object-result,
   .text-result {
-    background-color: #f8f8f8;
     padding: 8px 10px;
     border-radius: 3px;
     overflow-x: auto;
@@ -170,7 +168,6 @@ const resultError = computed(() => {
   }
 
   .test-log {
-    background-color: #f8f8f8;
     padding: 8px 10px;
     border-radius: 3px;
     overflow-x: auto;

packages/ui/certd-client/src/views/sys/nettest/index.vue

@@ -30,7 +30,6 @@ import ServerInfoCard from "./ServerInfoCard.vue";
 .page-sys-nettest {
   .nettest-container {
     padding: 16px;
-    background-color: #fff;
   }
 
   .test-areas {