diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 39a404b..dfc31e6 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -4,11 +4,11 @@ import {
   Bot,
   Boxes,
   ChevronLeft,
+  ChevronRight,
   Clock3,
   FileText,
   Home,
   PlayCircle,
-  User,
   Video,
   Workflow,
 } from "lucide-react";
@@ -31,7 +31,6 @@ const mainItems: Array<{
   { key: "history", label: "历史记录", icon: Clock3 },
   { key: "test", label: "测试助手", icon: PlayCircle },
   { key: "workflow", label: "工作流", icon: Workflow },
-  { key: "profile", label: "个人中心", icon: User },
 ];
 
 const assistantSubItems: Array<{
@@ -94,16 +93,25 @@ export function Sidebar({
         />
 
         <div className="pt-2">
-          <div
-            className={[
-              "flex h-11 w-full items-center gap-3 rounded-full px-3 text-sm",
-              assistantActive ? "text-foreground" : "text-muted-foreground",
-              collapsed ? "justify-center" : "",
-            ].join(" ")}
-          >
-            <Bot size={18} />
-            {!collapsed && <span className="font-medium">创建助手</span>}
-          </div>
+          {collapsed ? (
+            <div
+              className="flex h-8 items-center justify-center"
+              aria-hidden="true"
+              title="创建助手"
+            >
+              <span className="h-px w-6 rounded-full bg-hairline-strong" />
+            </div>
+          ) : (
+            <div
+              className={[
+                "flex h-11 w-full items-center gap-3 rounded-full px-3 text-sm",
+                assistantActive ? "text-foreground" : "text-muted-foreground",
+              ].join(" ")}
+            >
+              <Bot size={18} />
+              <span className="font-medium">创建助手</span>
+            </div>
+          )}
 
           <div
             className={[
@@ -139,15 +147,78 @@ export function Sidebar({
         </div>
       </nav>
 
-      <div className="border-t border-sidebar-border p-3">
+      <div className="space-y-2 border-t border-sidebar-border p-3">
+        {/* 个人中心 */}
+        <button
+          onClick={() => onNavigate("profile")}
+          title={collapsed ? "个人中心 · 管理员" : undefined}
+          className={[
+            "group relative flex w-full items-center overflow-hidden rounded-2xl border py-2 text-left transition-[background-color,color,border-color,box-shadow,transform] duration-200 active:scale-[0.98]",
+            active === "profile"
+              ? "border-sidebar-border bg-sidebar-accent text-sidebar-accent-foreground shadow-sm"
+              : "border-transparent text-muted-foreground hover:border-sidebar-border hover:bg-sidebar-accent/60 hover:text-foreground hover:shadow-sm",
+            collapsed ? "justify-center gap-0 px-0" : "gap-3 px-2.5",
+          ].join(" ")}
+        >
+          <span className="relative shrink-0">
+            <span
+              className="flex h-9 w-9 items-center justify-center rounded-full text-sm font-medium text-on-primary shadow-sm transition-transform duration-200 group-hover:scale-105"
+              style={{
+                backgroundColor: "var(--primary)",
+                backgroundImage:
+                  "radial-gradient(circle at 30% 20%, color-mix(in srgb, var(--gradient-sky) 70%, transparent), transparent 60%), radial-gradient(circle at 80% 90%, color-mix(in srgb, var(--gradient-lavender) 65%, transparent), transparent 55%)",
+              }}
+            >
+              <span style={{ color: "var(--primary-foreground)" }}>管</span>
+            </span>
+            <span
+              className="absolute -bottom-0.5 -right-0.5 h-3 w-3 rounded-full border-2 border-sidebar"
+              style={{ backgroundColor: "var(--success)" }}
+            />
+          </span>
+
+          <span
+            className={[
+              "min-w-0 flex-1 overflow-hidden transition-all duration-300 ease-[cubic-bezier(0.22,1,0.36,1)]",
+              collapsed ? "w-0 opacity-0 -translate-x-2" : "opacity-100 translate-x-0",
+            ].join(" ")}
+          >
+            <span className="block truncate text-sm font-medium text-foreground">
+              管理员
+            </span>
+            <span className="block truncate text-xs text-muted-soft">超级管理员</span>
+          </span>
+
+          <ChevronRight
+            size={16}
+            className={[
+              "shrink-0 text-muted-soft transition-all duration-200 group-hover:translate-x-0.5 group-hover:text-foreground",
+              collapsed ? "hidden" : "opacity-0 group-hover:opacity-100",
+            ].join(" ")}
+          />
+        </button>
+
+        {/* 收起 / 展开侧栏 */}
         <button
           onClick={onToggle}
-          className="flex h-10 w-full items-center justify-center rounded-full border border-hairline-strong text-muted-foreground transition-[background-color,color,border-color,transform] duration-200 hover:bg-surface-strong hover:text-foreground active:scale-95"
+          title={collapsed ? "展开侧栏" : "收起侧栏"}
+          className={[
+            "group flex h-10 w-full items-center gap-2 overflow-hidden rounded-full border border-hairline-strong text-sm text-muted-foreground transition-[background-color,color,border-color,transform] duration-200 hover:bg-surface-strong hover:text-foreground active:scale-[0.98]",
+            collapsed ? "justify-center px-0" : "justify-between px-3.5",
+          ].join(" ")}
         >
+          <span
+            className={[
+              "min-w-0 truncate transition-all duration-300 ease-[cubic-bezier(0.22,1,0.36,1)]",
+              collapsed ? "w-0 opacity-0 -translate-x-2" : "opacity-100 translate-x-0",
+            ].join(" ")}
+          >
+            收起侧栏
+          </span>
           <ChevronLeft
             size={18}
             className={[
-              "transition-transform duration-300 ease-[cubic-bezier(0.22,1,0.36,1)]",
+              "shrink-0 transition-transform duration-300 ease-[cubic-bezier(0.22,1,0.36,1)] group-hover:scale-110",
               collapsed ? "rotate-180" : "rotate-0",
             ].join(" ")}
           />
@@ -177,12 +248,12 @@ function NavButton({
       onClick={onClick}
       title={collapsed ? label : undefined}
       className={[
-        "group mt-1 flex w-full items-center gap-3 overflow-hidden rounded-full px-3 text-sm transition-[background-color,color,transform] duration-200 hover:translate-x-0.5 active:scale-[0.98]",
+        "group mt-1 flex w-full items-center overflow-hidden rounded-full text-sm transition-[background-color,color,transform] duration-200 active:scale-[0.98]",
         small ? "h-10" : "h-11",
         active
           ? "bg-sidebar-accent text-sidebar-accent-foreground font-medium"
           : "text-muted-foreground hover:bg-sidebar-accent/60 hover:text-foreground",
-        collapsed ? "justify-center" : "",
+        collapsed ? "justify-center gap-0 px-0" : "gap-3 px-3 hover:translate-x-0.5",
       ].join(" ")}
     >
       <Icon