diff --git a/src/components/layout/MainLayout.tsx b/src/components/layout/MainLayout.tsx
index c62d283..81ace68 100644
--- a/src/components/layout/MainLayout.tsx
+++ b/src/components/layout/MainLayout.tsx
@@ -13,15 +13,15 @@ import { Button } from '@/components/ui/Button';
 import { PageTransition } from '@/components/common/PageTransition';
 import { MainRoutes } from '@/router/MainRoutes';
 import {
-  IconBot,
-  IconChartLine,
-  IconFileText,
-  IconInfo,
-  IconLayoutDashboard,
-  IconScrollText,
-  IconSettings,
-  IconShield,
-  IconTimer,
+  IconSidebarAuthFiles,
+  IconSidebarConfig,
+  IconSidebarDashboard,
+  IconSidebarLogs,
+  IconSidebarOauth,
+  IconSidebarProviders,
+  IconSidebarQuota,
+  IconSidebarSystem,
+  IconSidebarUsage,
 } from '@/components/ui/icons';
 import { INLINE_LOGO_JPEG } from '@/assets/logoInline';
 import {
@@ -38,15 +38,15 @@ import { isSupportedLanguage } from '@/utils/language';
 import type { Theme } from '@/types';
 
 const sidebarIcons: Record<string, ReactNode> = {
-  dashboard: <IconLayoutDashboard size={18} />,
-  aiProviders: <IconBot size={18} />,
-  authFiles: <IconFileText size={18} />,
-  oauth: <IconShield size={18} />,
-  quota: <IconTimer size={18} />,
-  usage: <IconChartLine size={18} />,
-  config: <IconSettings size={18} />,
-  logs: <IconScrollText size={18} />,
-  system: <IconInfo size={18} />,
+  dashboard: <IconSidebarDashboard size={18} />,
+  aiProviders: <IconSidebarProviders size={18} />,
+  authFiles: <IconSidebarAuthFiles size={18} />,
+  oauth: <IconSidebarOauth size={18} />,
+  quota: <IconSidebarQuota size={18} />,
+  usage: <IconSidebarUsage size={18} />,
+  config: <IconSidebarConfig size={18} />,
+  logs: <IconSidebarLogs size={18} />,
+  system: <IconSidebarSystem size={18} />,
 };
 
 // Header action icons - smaller size for header buttons
@@ -132,7 +132,13 @@ const headerIcons = {
         </clipPath>
       </defs>
       <circle cx="12" cy="12" r="4" />
-      <circle cx="12" cy="12" r="4" clipPath="url(#mainLayoutAutoThemeSunLeftHalf)" fill="currentColor" />
+      <circle
+        cx="12"
+        cy="12"
+        r="4"
+        clipPath="url(#mainLayoutAutoThemeSunLeftHalf)"
+        fill="currentColor"
+      />
       <path d="M12 2v2" />
       <path d="M12 20v2" />
       <path d="M4.93 4.93l1.41 1.41" />
@@ -171,17 +177,35 @@ const THEME_CARDS: Array<{
   {
     key: 'white',
     labelKey: 'theme.white',
-    colors: { bg: '#ffffff', card: '#ffffff', border: '#e5e5e5', text: '#2d2a26', textMuted: '#a29c95' },
+    colors: {
+      bg: '#ffffff',
+      card: '#ffffff',
+      border: '#e5e5e5',
+      text: '#2d2a26',
+      textMuted: '#a29c95',
+    },
   },
   {
     key: 'light',
     labelKey: 'theme.light',
-    colors: { bg: '#faf9f5', card: '#f0eee8', border: '#e3e1db', text: '#2d2a26', textMuted: '#a29c95' },
+    colors: {
+      bg: '#faf9f5',
+      card: '#f0eee8',
+      border: '#e3e1db',
+      text: '#2d2a26',
+      textMuted: '#a29c95',
+    },
   },
   {
     key: 'dark',
     labelKey: 'theme.dark',
-    colors: { bg: '#151412', card: '#1d1b18', border: '#3a3530', text: '#f6f4f1', textMuted: '#9c958d' },
+    colors: {
+      bg: '#151412',
+      card: '#1d1b18',
+      border: '#3a3530',
+      text: '#f6f4f1',
+      textMuted: '#9c958d',
+    },
   },
 ];
 
@@ -420,7 +444,6 @@ export function MainLayout() {
     });
   }, [fetchConfig]);
 
-
   const statusClass =
     connectionStatus === 'connected'
       ? 'success'
@@ -503,7 +526,7 @@ export function MainLayout() {
     clearCache();
     const results = await Promise.allSettled([
       fetchConfig(undefined, true),
-      triggerHeaderRefresh()
+      triggerHeaderRefresh(),
     ]);
     const rejected = results.find((result) => result.status === 'rejected');
     if (rejected && rejected.status === 'rejected') {
@@ -618,7 +641,10 @@ export function MainLayout() {
             >
               {headerIcons.update}
             </Button>
-            <div className={`language-menu ${languageMenuOpen ? 'open' : ''}`} ref={languageMenuRef}>
+            <div
+              className={`language-menu ${languageMenuOpen ? 'open' : ''}`}
+              ref={languageMenuRef}
+            >
               <Button
                 variant="ghost"
                 size="sm"
@@ -631,7 +657,11 @@ export function MainLayout() {
                 {headerIcons.language}
               </Button>
               {languageMenuOpen && (
-                <div className="notification entering language-menu-popover" role="menu" aria-label={t('language.switch')}>
+                <div
+                  className="notification entering language-menu-popover"
+                  role="menu"
+                  aria-label={t('language.switch')}
+                >
                   {LANGUAGE_ORDER.map((lang) => (
                     <button
                       key={lang}
@@ -667,7 +697,11 @@ export function MainLayout() {
                       : headerIcons.sun}
               </Button>
               {themeMenuOpen && (
-                <div className="notification entering theme-menu-popover" role="menu" aria-label={t('theme.switch')}>
+                <div
+                  className="notification entering theme-menu-popover"
+                  role="menu"
+                  aria-label={t('theme.switch')}
+                >
                   {THEME_CARDS.map((tc) => (
                     <button
                       key={tc.key}
@@ -679,7 +713,10 @@ export function MainLayout() {
                     >
                       <div
                         className="theme-card-preview"
-                        style={{ background: tc.colors.bg, border: `1px solid ${tc.colors.border}` }}
+                        style={{
+                          background: tc.colors.bg,
+                          border: `1px solid ${tc.colors.border}`,
+                        }}
                       >
                         <div
                           className="theme-card-header"
diff --git a/src/components/ui/icons.tsx b/src/components/ui/icons.tsx
index 53487e4..f79092f 100644
--- a/src/components/ui/icons.tsx
+++ b/src/components/ui/icons.tsx
@@ -16,7 +16,15 @@ const baseSvgProps: SVGProps<SVGSVGElement> = {
   strokeLinecap: 'round',
   strokeLinejoin: 'round',
   'aria-hidden': 'true',
-  focusable: 'false'
+  focusable: 'false',
+};
+
+const sidebarSvgProps: SVGProps<SVGSVGElement> = {
+  ...baseSvgProps,
+  strokeWidth: 1.72,
+  strokeLinecap: 'square',
+  strokeLinejoin: 'miter',
+  strokeMiterlimit: 10,
 };
 
 export function IconSlidersHorizontal({ size = 20, ...props }: IconProps) {
@@ -322,3 +330,185 @@ export function IconLayoutDashboard({ size = 20, ...props }: IconProps) {
     </svg>
   );
 }
+
+export function IconSidebarDashboard({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <rect x="3.75" y="4.5" width="16.5" height="15" rx="1.5" />
+      <path d="M3.75 9.25h16.5" />
+      <path d="M10.5 9.25V19.5" />
+      <rect
+        x="6.1"
+        y="12.1"
+        width="2.3"
+        height="2.3"
+        rx="0.35"
+        fill="currentColor"
+        fillOpacity="0.16"
+      />
+      <polyline points="13.1 15.8 15.2 13.6 16.8 15 18.35 11.95" />
+    </svg>
+  );
+}
+
+export function IconSidebarConfig({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <path d="M5 8h14" />
+      <path d="M5 16h14" />
+      <path d="M9 6.1 10.9 8 9 9.9 7.1 8Z" fill="currentColor" fillOpacity="0.16" />
+      <rect
+        x="13.6"
+        y="14.1"
+        width="2.9"
+        height="2.9"
+        rx="0.45"
+        fill="currentColor"
+        fillOpacity="0.16"
+      />
+    </svg>
+  );
+}
+
+export function IconSidebarProviders({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <path d="M12 4.7 14.8 7.5 12 10.3 9.2 7.5Z" fill="currentColor" fillOpacity="0.16" />
+      <rect x="4.6" y="13" width="3.8" height="3.8" rx="0.5" />
+      <rect x="15.6" y="13" width="3.8" height="3.8" rx="0.5" />
+      <rect x="10.1" y="16.5" width="3.8" height="3.8" rx="0.5" />
+      <path d="M12 10.3v6.2" />
+      <path d="M12 10.3 6.5 13" />
+      <path d="M12 10.3 17.5 13" />
+    </svg>
+  );
+}
+
+export function IconSidebarAuthFiles({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <path d="M7 4.5h7l3 3v11a2.5 2.5 0 0 1-2.5 2.5H7.5A2.5 2.5 0 0 1 5 18.5V7a2.5 2.5 0 0 1 2-2.5Z" />
+      <path d="M14 4.5v3h3" />
+      <path d="M8.4 10.9h5.7" />
+      <path d="M8.4 14.2h4.4" />
+      <path d="M15.9 14.6 18.3 17 15.9 19.4 13.5 17Z" fill="currentColor" fillOpacity="0.16" />
+      <path d="m14.9 17 0.9 0.9 1.8-1.9" />
+    </svg>
+  );
+}
+
+export function IconSidebarOauth({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <path d="M4.5 8.5h8.2" />
+      <polyline points="10.1 5.6 13 8.5 10.1 11.4" />
+      <path d="M19.5 15.5h-8.2" />
+      <polyline points="13.9 12.6 11 15.5 13.9 18.4" />
+      <path d="M12 9.4 14.6 12 12 14.6 9.4 12Z" fill="currentColor" fillOpacity="0.16" />
+    </svg>
+  );
+}
+
+export function IconSidebarQuota({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <path d="M5 16.8a7 7 0 0 1 14 0" />
+      <path d="m7.3 13.8 1.4-1.4" />
+      <path d="M12 11V9" />
+      <path d="m16.7 13.8-1.4-1.4" />
+      <path d="M12 16.8 15.5 12.4" />
+      <path d="M12 15.2 13.6 16.8 12 18.4 10.4 16.8Z" fill="currentColor" stroke="none" />
+    </svg>
+  );
+}
+
+export function IconSidebarUsage({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <path d="M5 5v14a2 2 0 0 0 2 2h12" />
+      <polyline points="7.4 15.5 10.2 12.3 12.7 13.8 16.1 9.1 18.4 10.8" />
+      <rect
+        x="9.55"
+        y="11.65"
+        width="1.3"
+        height="1.3"
+        rx="0.2"
+        fill="currentColor"
+        stroke="none"
+      />
+      <rect
+        x="12.05"
+        y="13.15"
+        width="1.3"
+        height="1.3"
+        rx="0.2"
+        fill="currentColor"
+        stroke="none"
+      />
+      <rect
+        x="15.45"
+        y="8.45"
+        width="1.3"
+        height="1.3"
+        rx="0.2"
+        fill="currentColor"
+        stroke="none"
+      />
+    </svg>
+  );
+}
+
+export function IconSidebarLogs({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <rect x="4" y="5" width="16" height="14" rx="1.5" />
+      <path d="M4 9h16" />
+      <rect
+        x="6.1"
+        y="6.35"
+        width="1.15"
+        height="1.15"
+        rx="0.15"
+        fill="currentColor"
+        stroke="none"
+      />
+      <rect
+        x="8.55"
+        y="6.35"
+        width="1.15"
+        height="1.15"
+        rx="0.15"
+        fill="currentColor"
+        fillOpacity="0.45"
+        stroke="none"
+      />
+      <path d="m7.1 12.3 2.5 2-2.5 2" />
+      <path d="M11.9 12.2h3.4" />
+      <path d="M11.9 16.4h4.8" />
+    </svg>
+  );
+}
+
+export function IconSidebarSystem({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...sidebarSvgProps} width={size} height={size} {...props}>
+      <rect x="5" y="5" width="14" height="3.3" rx="0.8" />
+      <rect x="5" y="10.35" width="14" height="3.3" rx="0.8" />
+      <rect x="5" y="15.7" width="14" height="3.3" rx="0.8" />
+      <rect x="6.8" y="6.05" width="1.1" height="1.1" rx="0.15" fill="currentColor" stroke="none" />
+      <rect x="6.8" y="11.4" width="1.1" height="1.1" rx="0.15" fill="currentColor" stroke="none" />
+      <rect
+        x="6.8"
+        y="16.75"
+        width="1.1"
+        height="1.1"
+        rx="0.15"
+        fill="currentColor"
+        stroke="none"
+      />
+      <path d="M10.4 6.6h5.2" />
+      <path d="M10.4 11.95h5.2" />
+      <path d="M10.4 17.3h5.2" />
+    </svg>
+  );
+}
diff --git a/src/styles/layout.scss b/src/styles/layout.scss
index c5cbec0..27a4045 100644
--- a/src/styles/layout.scss
+++ b/src/styles/layout.scss
@@ -81,7 +81,9 @@
     cursor: pointer;
     font-size: 16px;
     font-weight: bold;
-    transition: background $transition-fast, color $transition-fast;
+    transition:
+      background $transition-fast,
+      color $transition-fast;
     display: flex;
     align-items: center;
     justify-content: center;
@@ -118,7 +120,10 @@
       max-width: 320px;
       opacity: 1;
       transform: translateX(0);
-      transition: max-width 0.4s ease, opacity 0.4s ease, transform 0.4s ease;
+      transition:
+        max-width 0.4s ease,
+        opacity 0.4s ease,
+        transform 0.4s ease;
     }
 
     .brand-abbr {
@@ -126,7 +131,9 @@
       transform: translateX(12px);
       opacity: 0;
       pointer-events: none;
-      transition: opacity 0.4s ease, transform 0.4s ease;
+      transition:
+        opacity 0.4s ease,
+        transform 0.4s ease;
     }
 
     &.collapsed {
@@ -220,7 +227,9 @@
         display: flex;
         align-items: center;
         justify-content: space-between;
-        transition: background-color $transition-fast, color $transition-fast;
+        transition:
+          background-color $transition-fast,
+          color $transition-fast;
 
         &:hover {
           background: var(--bg-secondary);
@@ -278,7 +287,9 @@
         flex-direction: column;
         align-items: center;
         gap: 4px;
-        transition: border-color $transition-fast, background-color $transition-fast;
+        transition:
+          border-color $transition-fast,
+          background-color $transition-fast;
 
         &:hover {
           background: var(--bg-secondary);
@@ -439,7 +450,9 @@
   display: flex;
   flex-direction: column;
   gap: $spacing-lg;
-  transition: width $transition-normal, transform $transition-normal;
+  transition:
+    width $transition-normal,
+    transform $transition-normal;
   overflow-y: auto;
   flex-shrink: 0;
   height: 100%;
@@ -464,22 +477,33 @@
   .nav-item {
     padding: 10px 12px;
     border-radius: $radius-md;
+    border: 1px solid transparent;
     color: var(--text-primary);
     font-weight: 600;
     display: flex;
     align-items: center;
     gap: $spacing-sm;
     cursor: pointer;
-    transition: background $transition-fast, color $transition-fast;
+    transition:
+      background $transition-fast,
+      color $transition-fast;
 
     .nav-icon {
-      width: 20px;
-      height: 20px;
+      width: 28px;
+      height: 28px;
       display: inline-flex;
       align-items: center;
       justify-content: center;
       flex-shrink: 0;
-      opacity: 0.9;
+      opacity: 0.96;
+      border-radius: 7px;
+      background: linear-gradient(180deg, rgb(255 255 255 / 0.18), rgb(255 255 255 / 0))
+        var(--bg-secondary);
+      box-shadow: inset 0 0 0 1px var(--border-primary);
+      transition:
+        background $transition-fast,
+        box-shadow $transition-fast,
+        color $transition-fast;
 
       svg {
         width: 18px;
@@ -496,12 +520,24 @@
 
     &:hover {
       background: var(--bg-secondary);
+
+      .nav-icon {
+        background: linear-gradient(180deg, rgb(255 255 255 / 0.24), rgb(255 255 255 / 0))
+          var(--bg-primary);
+        box-shadow: inset 0 0 0 1px var(--border-hover);
+      }
     }
 
     &.active {
       background: rgba($primary-color, 0.14);
       color: var(--primary-color);
       border: 1px solid rgba($primary-color, 0.35);
+
+      .nav-icon {
+        background: linear-gradient(180deg, rgb(255 255 255 / 0.22), rgb(255 255 255 / 0))
+          rgba($primary-color, 0.1);
+        box-shadow: inset 0 0 0 1px rgba($primary-color, 0.26);
+      }
     }
   }