diff --git a/.memory/worklog.json b/.memory/worklog.json
index 04b98ca..f24bcb8 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -1,18 +1,5 @@
 {
   "entries": [
-    {
-      "files_changed": 3,
-      "message": "Codex 会话活跃 · 最近命令：codex · 3 项未提交变更 · 最近提交：auto-save 2026-05-14 04:04 (~6)",
-      "ts": "2026-05-13T20:08:50Z",
-      "type": "session-heartbeat"
-    },
-    {
-      "files_changed": 4,
-      "hash": "0448d28",
-      "message": "auto-save 2026-05-14 04:10 (~4)",
-      "ts": "2026-05-14T04:10:26+08:00",
-      "type": "commit"
-    },
     {
       "files_changed": 3,
       "message": "Claude 会话活跃 · 最近命令：claude · 3 项未提交变更 · 最近提交：auto-save 2026-05-14 04:10 (~4)",
@@ -3260,6 +3247,19 @@
       "type": "session-heartbeat",
       "message": "Codex 会话活跃 · 最近命令：codex · 1 项未提交变更 · 最近提交：auto-save 2026-05-15 20:14 (~5)",
       "files_changed": 1
+    },
+    {
+      "ts": "2026-05-15T20:20:21+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-15 20:20 (~3)",
+      "hash": "fa17798",
+      "files_changed": 3
+    },
+    {
+      "ts": "2026-05-15T13:18:50Z",
+      "type": "session-heartbeat",
+      "message": "Codex 会话活跃 · 最近命令：codex · 3 项未提交变更 · 最近提交：auto-save 2026-05-15 20:20 (~3)",
+      "files_changed": 3
     }
   ]
 }
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index 6b454de..3d60e29 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -954,7 +954,7 @@ SubjectAsset {
             </header>
             <div class="body">
               <p><strong>问题：</strong>组合登录框仍放在普通文档流的居中容器里，背景滚动或视口变化时视觉上会偏离画面中心。</p>
-              <p><strong>改动：</strong><code>web/app/globals.css</code> 将 <code>login-source-overlay</code> 改为固定覆盖全屏的网格层，用 <code>place-items:center</code> 居中；组合登录框自身也显式 <code>justify-self/align-self:center</code>，保证整框以视口中心为基准。</p>
+              <p><strong>改动：</strong><code>web/app/globals.css</code> 将 <code>login-source-overlay</code> 改为固定覆盖全屏层；组合登录框自身用 <code>position:fixed; left/top:50%; transform:translate(-50%,-50%)</code> 直接锚定视口中心，避免网格或背景滚动状态造成偏移。</p>
               <p><strong>影响：</strong><code>web/app/globals.css</code>、<code>docs/source-analysis.html</code>。</p>
             </div>
           </article>
diff --git a/web/app/globals.css b/web/app/globals.css
index f71da38..abc2a19 100644
--- a/web/app/globals.css
+++ b/web/app/globals.css
@@ -378,23 +378,23 @@
   position: fixed;
   inset: 0;
   z-index: 10;
-  display: grid;
+  display: block;
   min-height: 100vh;
   min-height: 100dvh;
-  grid-template-columns: minmax(0, auto);
-  place-items: center;
   padding: clamp(20px, 4vw, 56px);
   pointer-events: none;
 }
 .login-page--oasis .login-source-auth-panel {
+  position: fixed;
+  left: 50%;
+  top: 50%;
   display: grid;
   width: min(820px, calc(100vw - 40px));
   grid-template-columns: minmax(320px, 360px) minmax(300px, 360px);
   align-items: center;
   gap: 20px;
   padding: 18px;
-  justify-self: center;
-  align-self: center;
+  transform: translate(-50%, -50%);
   pointer-events: auto;
   background: rgba(10, 18, 10, 0.2);
   backdrop-filter: none;