diff --git a/static/css/themes/test01.css b/static/css/themes/test01.css
new file mode 100644
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+++ b/static/css/themes/test01.css
@@ -0,0 +1,270 @@
+/* test01 —— 由 dev/theme-builder 生成，可直接手改。
+   装饰层固定 10 个槽位（对应 base.css 的 12 层背景）；
+   按页面覆盖时也必须写满 10 个，否则图层会与 size/position 错位。 */
+html[data-theme-style="test01"] {
+    --tb-bg: #eef3f9;
+    --tb-surface: rgba(255,255,255,0.86);
+    --tb-surface-2: rgba(242, 242, 243, 0.86);
+    --tb-surface-hover: rgba(237, 242, 249, 0.86);
+    --tb-navbar: rgba(255,255,255,0.52);
+    --tb-border: #d6e0ec;
+    --tb-text: #222d3b;
+    --tb-text-secondary: rgb(107, 116, 127);
+    --tb-text-muted: rgb(146, 154, 164);
+    --tb-primary: #4a7fc1;
+    --tb-primary-weak: rgba(74, 127, 193, 0.12);
+    --tb-page-image: none;
+    --tb-page-pattern: none;
+    --tb-page-pattern-size: 320px 320px;
+    --tb-page-position: center center;
+    --tb-deco: none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none;
+    --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top;
+}
+
+html[data-theme="dark"][data-theme-style="test01"] {
+    --tb-bg: #141a22;
+    --tb-surface: #1d2530;
+    --tb-surface-2: rgb(41, 49, 60);
+    --tb-surface-hover: rgb(37, 50, 66);
+    --tb-navbar: #141a22;
+    --tb-border: #334052;
+    --tb-text: #e3eaf4;
+    --tb-text-secondary: rgb(152, 159, 168);
+    --tb-text-muted: rgb(113, 120, 129);
+    --tb-primary: #6fa3e0;
+    --tb-primary-weak: rgba(111, 163, 224, 0.12);
+    --tb-page-image: linear-gradient(180deg, #141a22 0%, #141a22 60%, #0e1319 100%);
+    --tb-page-pattern: none;
+    --tb-deco: none, none, none, none, none, none, none, none, none, none;
+    --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: left top, left top, left top, left top, left top, left top, left top, left top, left top, left top;
+}
+
+/* 箱主页 /_/{domain} */
+html[data-theme-style="test01"][data-page-scope="box"] {
+    --tb-page-image: url("/static/images/themes/test01/20260803152009-33-24.webp");
+    --tb-page-pattern: none;
+    --tb-page-pattern-size: 320px 320px;
+    --tb-page-position: center center;
+    --tb-deco: none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none;
+    --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top;
+}
+
+html[data-theme="dark"][data-theme-style="test01"][data-page-scope="box"] {
+    --tb-page-image: none;
+    --tb-page-pattern: none;
+    --tb-deco: none, none, none, none, none, none, none, none, none, none;
+    --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: left top, left top, left top, left top, left top, left top, left top, left top, left top, left top;
+}
+
+/* 问题页 /_/{domain}/{id} */
+html[data-theme-style="test01"][data-page-scope="question"] {
+    --tb-page-image: none;
+    --tb-page-pattern: none;
+    --tb-page-pattern-size: 320px 320px;
+    --tb-page-position: center center;
+    --tb-deco: url("/static/images/themes/test01/yande-re-20537358-205-to.webp"),
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none;
+    --tb-deco-size: auto clamp(min(calc(100vh - 24px), 198px), 40vh, 360px), auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: calc(50% - 0.67vh) calc(100% - 42.56vh),
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top;
+}
+
+html[data-theme="dark"][data-theme-style="test01"][data-page-scope="question"] {
+    --tb-page-image: none;
+    --tb-page-pattern: none;
+    --tb-deco: none, none, none, none, none, none, none, none, none, none;
+    --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: left top, left top, left top, left top, left top, left top, left top, left top, left top, left top;
+}
+
+/* 题目列表 /user/questions */
+html[data-theme-style="test01"][data-page-scope="admin"] {
+    --tb-page-image: none;
+    --tb-page-pattern: none;
+    --tb-page-pattern-size: 320px 320px;
+    --tb-page-position: center center;
+    --tb-deco: url("/static/images/themes/test01/yande-re-20537358-205-to.webp"),
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none,
+        none;
+    --tb-deco-size: auto clamp(min(calc(100vh - 24px), 198px), 40vh, 360px), auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: calc(50% + 0px) calc(100% - 4.44vh),
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top,
+        left top;
+}
+
+html[data-theme="dark"][data-theme-style="test01"][data-page-scope="admin"] {
+    --tb-page-image: none;
+    --tb-page-pattern: none;
+    --tb-deco: none, none, none, none, none, none, none, none, none, none;
+    --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+    --tb-deco-position: left top, left top, left top, left top, left top, left top, left top, left top, left top, left top;
+}
+
+/* 窄屏：卡片几乎占满宽度，两侧没有留白，桌面那套背景与装饰在这里只会被裁/被盖。
+   每个独立配置的页面都要写一条 —— 页面覆盖块特异性更高（0,2,1），
+   只写 html[data-theme-style] 的话，独立配置的页面在手机上根本不生效。 */
+@media (max-width: 900px) {
+    html[data-theme-style="test01"] {
+        --tb-deco: none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none;
+        --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+        --tb-deco-position: left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top;
+    }
+    html[data-theme-style="test01"][data-page-scope="box"] {
+        --tb-page-position: center center;
+        --tb-deco: none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none;
+        --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+        --tb-deco-position: left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top;
+    }
+    html[data-theme-style="test01"][data-page-scope="question"] {
+        --tb-deco: none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none;
+        --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+        --tb-deco-position: left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top;
+    }
+    html[data-theme-style="test01"][data-page-scope="admin"] {
+        --tb-deco: none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none,
+            none;
+        --tb-deco-size: auto, auto, auto, auto, auto, auto, auto, auto, auto, auto;
+        --tb-deco-position: left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top,
+            left top;
+    }
+}
diff --git a/static/images/themes/test01/20260803152009-33-24.webp b/static/images/themes/test01/20260803152009-33-24.webp
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diff --git a/static/images/themes/test01/yande-re-20537358-205-to.webp b/static/images/themes/test01/yande-re-20537358-205-to.webp
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