diff --git a/internal/conf/static.go b/internal/conf/static.go
index 70139a6..c8d0b18 100644
--- a/internal/conf/static.go
+++ b/internal/conf/static.go
@@ -10,7 +10,7 @@ var (
 	BuildCommit = "dev"
 
 	// StaticVersion 静态资源缓存版本号：base.css 与主题 css 共用，改样式只改这一处。
-	StaticVersion = "20261019n"
+	StaticVersion = "20261019o"
 )
 
 // 文本审核通道取值（[security] text_censor_source）。定义在 conf 侧，
diff --git a/static/css/themes/shiroko.css b/static/css/themes/shiroko.css
index 4c91a59..118421f 100644
--- a/static/css/themes/shiroko.css
+++ b/static/css/themes/shiroko.css
@@ -25,7 +25,7 @@ html[data-theme-style="shiroko"] {
 
     /* 整页底色用极浅的竖向渐变（纯 CSS）：比图片稳，不会有 cover 缩放差异 */
     --tb-page-image: linear-gradient(180deg, #f8fbfe 0%, #edf3f9 58%, #e2ecf6 100%);
-    --tb-page-pattern: url("/static/images/themes/shiroko/pattern.svg");
+    --tb-page-pattern: url("/static/images/themes/shiroko/pattern.svg?v=20261019o");
     --tb-page-pattern-size: 340px 340px;
 
     /* 装饰层：左下角一组两人（盘腿坐 + 挥手），都贴住左边缘与页面下沿。
@@ -60,7 +60,7 @@ html[data-theme="dark"][data-theme-style="shiroko"] {
     --tb-shadow-hover: 0 1px 2px rgba(0, 0, 0, 0.40), 0 18px 40px -20px rgba(0, 0, 0, 0.68);
 
     --tb-page-image: linear-gradient(180deg, #161d26 0%, #141a22 60%, #11161d 100%);
-    --tb-page-pattern: url("/static/images/themes/shiroko/pattern-dark.svg");
+    --tb-page-pattern: url("/static/images/themes/shiroko/pattern-dark.svg?v=20261019o");
     --tb-page-pattern-size: 340px 340px;
 
     /* 深色下人物整体关掉：浅色立绘在深底上会变成一块块亮斑，抢正文 */
diff --git a/static/images/themes/shiroko/pattern-dark.svg b/static/images/themes/shiroko/pattern-dark.svg
index 5aec0aa..031cc47 100644
--- a/static/images/themes/shiroko/pattern-dark.svg
+++ b/static/images/themes/shiroko/pattern-dark.svg
@@ -1,11 +1,15 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="240" height="240" viewBox="0 0 240 240">
-  <g fill="none" stroke="#8FB4DE" stroke-width="1.3" stroke-linecap="round" stroke-linejoin="round" opacity="0.11">
-    <g transform="translate(52 56)">
-      <path d="M0 -19V19M-16.5 -9.5L16.5 9.5M-16.5 9.5L16.5 -9.5"/>
-      <path d="M0 -19l-4.2 4.2M0 -19l4.2 4.2M0 19l-4.2-4.2M0 19l4.2-4.2"/>
+  <g fill="none" stroke="#8FB4DE" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round" opacity="0.09">
+    <g transform="translate(48 52)">
+      <path d="M0 -18V18M-15.6 -9L15.6 9M-15.6 9L15.6 -9"/>
+      <path d="M0 -18l-4 4M0 -18l4 4M0 18l-4-4M0 18l4-4"/>
     </g>
-    <ellipse cx="178" cy="62" rx="19" ry="6.8"/>
-    <circle cx="124" cy="150" r="1.6"/>
-    <circle cx="196" cy="176" r="1.3"/>
+    <circle cx="152" cy="64" r="1.6"/>
+    <ellipse cx="198" cy="132" rx="18" ry="6.4"/>
+    <g transform="translate(88 152) scale(0.62)">
+      <path d="M0 -18V18M-15.6 -9L15.6 9M-15.6 9L15.6 -9"/>
+    </g>
+    <circle cx="42" cy="212" r="1.4"/>
+    <circle cx="164" cy="204" r="1.7"/>
   </g>
 </svg>
diff --git a/static/images/themes/shiroko/pattern.svg b/static/images/themes/shiroko/pattern.svg
index 4a3f412..dea4fec 100644
--- a/static/images/themes/shiroko/pattern.svg
+++ b/static/images/themes/shiroko/pattern.svg
@@ -1,14 +1,16 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="240" height="240" viewBox="0 0 240 240">
-  <g fill="none" stroke="#6F90BC" stroke-width="1.3" stroke-linecap="round" stroke-linejoin="round" opacity="0.16">
-    <!-- 雪花 -->
-    <g transform="translate(52 56)">
-      <path d="M0 -19V19M-16.5 -9.5L16.5 9.5M-16.5 9.5L16.5 -9.5"/>
-      <path d="M0 -19l-4.2 4.2M0 -19l4.2 4.2M0 19l-4.2-4.2M0 19l4.2-4.2"/>
+  <!-- 元素按 3 行均布：集中在某一侧时，铺开后会出现横向条纹带 -->
+  <g fill="none" stroke="#6F90BC" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round" opacity="0.13">
+    <g transform="translate(48 52)">
+      <path d="M0 -18V18M-15.6 -9L15.6 9M-15.6 9L15.6 -9"/>
+      <path d="M0 -18l-4 4M0 -18l4 4M0 18l-4-4M0 18l4-4"/>
     </g>
-    <!-- 光环 -->
-    <ellipse cx="178" cy="62" rx="19" ry="6.8"/>
-    <!-- 两点碎屑：只保留极少元素，避免整页像涂鸦 -->
-    <circle cx="124" cy="150" r="1.6"/>
-    <circle cx="196" cy="176" r="1.3"/>
+    <circle cx="152" cy="64" r="1.6"/>
+    <ellipse cx="198" cy="132" rx="18" ry="6.4"/>
+    <g transform="translate(88 152) scale(0.62)">
+      <path d="M0 -18V18M-15.6 -9L15.6 9M-15.6 9L15.6 -9"/>
+    </g>
+    <circle cx="42" cy="212" r="1.4"/>
+    <circle cx="164" cy="204" r="1.7"/>
   </g>
 </svg>