fix: body 背景改为深色 #0A0C16，消除滚动闪白

- reset.css body background: #FFFFFF → #0A0C16
- theme.css body background: #FFFFFF → #0A0C16
- 修复 theme.css 被误删的规则（textarea/input）
- 滚动条颜色适配深色主题

common/reset.css

@@ -34,8 +34,8 @@ h5 {
 }
 
 body {
-  background-color: #FFFFFF;
-  color: rgba(0, 0, 0, 0.90);
+  background-color: #0A0C16;
+  color: rgba(220, 228, 240, 0.9);
   font-size: 16px;
   font-family: PingFang SC;
   font-weight: 400;

common/theme.css

@@ -1,20 +1,20 @@
-h1 {
-  font-size: 40px;
-  /* font-weight: bold; */
-}
-
-h2 {
-  font-size: 32px;
-}
-
-h3 {
-  font-size: 24px;
-}
-
-h4 {
-  font-size: 22px;
-}
-
+h1 {
+  font-size: 40px;
+  /* font-weight: bold; */
+}
+
+h2 {
+  font-size: 32px;
+}
+
+h3 {
+  font-size: 24px;
+}
+
+h4 {
+  font-size: 22px;
+}
+
 h5 {
   font-size: 20px;
 }
@@ -23,39 +23,38 @@ h5 {
   /* 全站主色：亮蓝偏青，科技感更强，和首页地球/轨迹保持一致 */
   color: #38BDF8;
 }
-
-textarea {
-  resize: none;
-}
-
-body {
-  background-color: #FFFFFF;
-  color: rgba(0, 0, 0, 0.90);
-  font-size: 14px;
-  font-family: PingFang SC;
-  font-weight: 400;
-}
-
-input {
-  outline: none;
-}
-
-/* 盒子阴影 */
-.box-shadow {
-  background: #FFFFFF;
-  box-shadow: 0px 0px 16px rgba(52, 52, 52, 0.16);
-}
-
-.box-shadow-light {
-  background: #FFFFFF;
-  box-shadow: 0px 0px 8px rgba(52, 52, 52, 0.08);
-}
-
-
-
-
+
+textarea {
+  resize: none;
+}
+
+body {
+  background-color: #0A0C16;
+  color: rgba(220, 228, 240, 0.9);
+  font-size: 14px;
+  font-family: PingFang SC;
+  font-weight: 400;
+}
+
+input {
+  outline: none;
+}
+
+/* 盒子阴影 */
+.box-shadow {
+  background: #FFFFFF;
+  box-shadow: 0px 0px 16px rgba(52, 52, 52, 0.16);
+}
+
+.box-shadow-light {
+  background: #FFFFFF;
+  box-shadow: 0px 0px 8px rgba(52, 52, 52, 0.08);
+}
+
+
+
 a {
-  color: #666;
+  color: #999;
   cursor: pointer;
   text-decoration: none;
 }
@@ -72,32 +71,31 @@ a:hover {
 .link-hover:hover {
   color: rgba(56, 189, 248, 1) !important;
 }
-
-.title-desc {
-  color: rgba(0, 0, 0, 0.9);
-  font-size: 14px;
-}
-
-
-
-::-webkit-scrollbar-thumb {
-  background-color: rgba(0, 0, 0, 0.2);
-  border: 1px solid #fff;
-  border-radius: 10px;
-}
-
-::-webkit-scrollbar {
-  width: 6px;
-  height: 6px;
-}
-
-
-.animated {
-  animation-duration: .5s !important;
-}
-
-
-
+
+.title-desc {
+  color: rgba(220, 228, 240, 0.8);
+  font-size: 14px;
+}
+
+
+::-webkit-scrollbar-thumb {
+  background-color: rgba(255, 255, 255, 0.15);
+  border: 1px solid rgba(255, 255, 255, 0.05);
+  border-radius: 10px;
+}
+
+::-webkit-scrollbar {
+  width: 6px;
+  height: 6px;
+}
+
+
+.animated {
+  animation-duration: .5s !important;
+}
+
+
+
 /* 按钮：统一改为无圆角，更贴近偏硬朗的科技风 */
 .btn {
   padding: 8px 20px;
@@ -135,11 +133,11 @@ a:hover {
   background: linear-gradient(135deg, #0EA5E9 0%, #4F46E5 100%);
   box-shadow: 0 14px 36px rgba(56, 189, 248, 0.6);
 }
-
-.btn-normal:disabled {
-  opacity: 0.4;
-}
-
+
+.btn-normal:disabled {
+  opacity: 0.4;
+}
+
 .btn-normal-light {
   color: rgba(15, 23, 42, 0.9);
   background: rgba(255, 255, 255, 0.95);