diff --git a/vehicle-data-platform/apps/web/index.html b/vehicle-data-platform/apps/web/index.html
index dc84da70..b0219270 100644
--- a/vehicle-data-platform/apps/web/index.html
+++ b/vehicle-data-platform/apps/web/index.html
@@ -3,13 +3,14 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>车辆数据管理中台</title>
+    <link rel="icon" type="image/svg+xml" href="/brand-mark.svg" />
+    <title>灵牛智能｜车辆数据中台</title>
     <style>
-      #platform-boot{display:grid;min-height:100vh;place-items:center;background:#f3f6fa;color:#1d2a3d;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}#platform-boot>div{display:grid;width:min(360px,calc(100vw - 40px));justify-items:center;border:1px solid #e1e8f1;border-radius:16px;background:#fff;padding:34px 28px;box-shadow:0 18px 55px rgba(22,43,75,.1);text-align:center}.platform-boot-mark{display:grid;width:44px;height:44px;place-items:center;border-radius:13px;background:#1268f3;color:#fff;font-size:20px;font-weight:800;box-shadow:0 9px 22px rgba(18,104,243,.22)}#platform-boot strong{margin-top:15px;font-size:18px}#platform-boot small{margin-top:8px;color:#758399;font-size:12px;line-height:1.6}#platform-boot button{height:40px;margin-top:20px;border:0;border-radius:8px;background:#1268f3;padding:0 18px;color:#fff;font-weight:700;cursor:pointer}#platform-boot.is-error .platform-boot-mark{background:#e5484d;box-shadow:0 9px 22px rgba(229,72,77,.2)}
+      #platform-boot{display:grid;min-height:100vh;place-items:center;background:#f3f6fa;color:#1d2a3d;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}#platform-boot>div{display:grid;width:min(360px,calc(100vw - 40px));justify-items:center;border:1px solid #e1e8f1;border-radius:16px;background:#fff;padding:34px 28px;box-shadow:0 18px 55px rgba(22,43,75,.1);text-align:center}.platform-boot-logo{display:block;width:150px;height:auto}#platform-boot strong{margin-top:18px;font-size:18px}#platform-boot small{margin-top:8px;color:#758399;font-size:12px;line-height:1.6}#platform-boot button{height:40px;margin-top:20px;border:0;border-radius:8px;background:#1268f3;padding:0 18px;color:#fff;font-weight:700;cursor:pointer}#platform-boot.is-error .platform-boot-logo{opacity:.45}
     </style>
   </head>
   <body>
-    <div id="root"><div id="platform-boot" role="status" aria-live="polite"><div><span class="platform-boot-mark">车</span><strong>车辆数据中台</strong><small>正在加载工作台…</small></div></div></div>
+    <div id="root"><div id="platform-boot" role="status" aria-live="polite"><div><img class="platform-boot-logo" src="/brand-logo.svg" alt="灵牛智能" /><strong>车辆数据中台</strong><small>正在加载工作台…</small></div></div></div>
     <script>
       (() => {
         const readyEvent = 'vehicle-platform:ready';
diff --git a/vehicle-data-platform/apps/web/public/brand-logo.svg b/vehicle-data-platform/apps/web/public/brand-logo.svg
new file mode 100644
index 00000000..c446aed9
--- /dev/null
+++ b/vehicle-data-platform/apps/web/public/brand-logo.svg
@@ -0,0 +1,44 @@
+<svg viewBox="5 4 140 28" fill="none" xmlns="http://www.w3.org/2000/svg" role="img" aria-labelledby="brand-title">
+<title id="brand-title">灵牛智能</title>
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diff --git a/vehicle-data-platform/apps/web/public/brand-mark.svg b/vehicle-data-platform/apps/web/public/brand-mark.svg
new file mode 100644
index 00000000..08f55e4a
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+<path d="M96.4304 26.879C99.2507 26.6667 98.9579 30.7714 95.9312 31.3474C92.5488 31.3098 93.6973 27.1881 96.4304 26.879ZM95.9883 30.5709C96.9304 30.2786 97.7955 29.3384 97.4662 28.3229C97.3944 28.096 97.2327 27.9087 97.0175 27.8056C96.7964 27.6975 96.4978 27.6448 96.2518 27.6614C95.3083 27.9393 94.49 28.8604 94.7842 29.8668C94.8501 30.099 95.0075 30.2944 95.2205 30.4079C95.4752 30.5427 95.7065 30.5599 95.9883 30.5709Z" fill="#2F2828"/>
+<path d="M120.579 26.8756C123.424 26.7179 123.034 30.7691 120.086 31.3456C116.806 31.3978 117.733 27.1994 120.579 26.8756ZM120.22 30.5368C122.019 29.9774 122.223 27.4751 120.314 27.6674C119.642 27.9156 119.439 28.0285 119.093 28.7081C118.616 29.6484 119.009 30.7721 120.22 30.5368Z" fill="#2F2828"/>
+<path d="M116.66 26.9238L117.992 26.9219C117.747 28.2834 117.347 29.9417 117.049 31.3153L116.157 31.3083C116.347 30.6023 116.495 29.7902 116.644 29.0672C116.688 28.9313 116.767 28.502 116.801 28.3408C116.395 29.0335 115.459 30.9511 114.675 31.3444C114.566 31.399 114.465 31.3038 114.371 31.2359C114.165 30.71 113.925 28.8772 113.836 28.242L113.198 31.3117L112.31 31.3165L113.23 26.9279L114.491 26.9225C114.605 27.7811 114.833 28.7942 114.973 29.6896C115.472 28.9993 116.215 27.6823 116.66 26.9238Z" fill="#2F2828"/>
+<path d="M86.5921 26.9211C86.9917 26.9147 87.4287 26.9264 87.8225 26.9095C90.4759 26.7956 90.1867 29.6754 88.5223 30.9111C87.5305 31.4374 86.7699 31.3173 85.6661 31.3024C85.7957 30.2878 86.3578 28.007 86.5921 26.9211ZM86.7231 30.4522C87.1359 30.4503 87.7347 30.4871 88.1007 30.316C88.6401 29.8127 89.3033 28.7778 88.6848 28.0956C88.3158 27.6887 87.7976 27.7551 87.2911 27.7533C87.1257 28.5612 86.9295 29.669 86.7231 30.4522Z" fill="#2F2828"/>
+<path d="M123.457 26.9226C124.213 26.9143 125.634 26.8007 126.186 27.3128C126.71 27.7978 125.896 28.5423 125.68 28.9376C125.595 29.0947 126.087 29.5814 126.078 29.8632C126.065 30.2604 125.746 30.6635 125.492 30.9391C124.737 31.4476 123.501 31.3147 122.564 31.3117C122.81 29.8751 123.187 28.3774 123.457 26.9226ZM123.593 30.5161C124.141 30.5116 124.358 30.5255 124.891 30.3884C125.067 30.151 125.129 30.0825 125.184 29.7933C125.024 29.2759 124.325 29.3801 123.862 29.3789L123.593 30.5161ZM123.999 28.6156C124.282 28.6098 124.866 28.6145 125.123 28.5796C125.245 28.3715 125.336 28.252 125.328 28.0082C125.082 27.6121 124.658 27.6901 124.214 27.6711C124.144 27.9762 124.058 28.3111 123.999 28.6156Z" fill="#2F2828"/>
+<path d="M90.735 26.9215C92.024 26.9243 94.8238 26.5442 93.2493 29.0441C93.0876 29.3009 92.7831 29.446 92.5137 29.583C92.7384 30.1413 92.9478 30.7419 93.1556 31.3095C92.8314 31.3198 92.3036 31.3998 92.0979 31.1551C91.9179 30.6395 91.7971 30.0956 91.3931 29.741C90.8792 29.6812 90.7592 30.8999 90.6765 31.3136L89.8201 31.3149C90.1114 29.8477 90.4166 28.3831 90.735 26.9215ZM91.2167 28.8258C91.4736 28.8227 92.2707 28.8268 92.4815 28.7911C92.6447 28.5511 92.7304 28.4484 92.7926 28.1652C92.6755 27.6152 91.9171 27.7496 91.4458 27.7535C91.366 28.1101 91.2891 28.4675 91.2167 28.8258Z" fill="#2F2828"/>
+<path d="M69.3081 26.9222L70.1771 26.9141C69.9698 28.186 69.5337 30.0383 69.2388 31.3177L68.1065 31.3098C67.8398 30.3494 67.4692 29.2815 67.1696 28.3128C67.0189 29.2546 66.7757 30.3753 66.5616 31.3076L65.6787 31.3079L66.6075 26.9221L67.7409 26.9223C68.0639 27.8733 68.37 28.898 68.6717 29.8604C68.873 28.8787 69.0851 27.8992 69.3081 26.9222Z" fill="#2F2828"/>
+<path d="M108.881 29.8868C109.027 29.2478 109.289 27.5001 109.54 27.0002C109.723 26.889 110.12 26.9136 110.352 26.9105C110.263 27.8288 109.679 30.3103 109.457 31.3037L108.341 31.3085C108.011 30.3531 107.719 29.367 107.384 28.4004L106.772 31.3134L105.9 31.3077C106.155 29.911 106.523 28.3126 106.832 26.9175L107.966 26.9206C108.2 27.8185 108.6 28.9795 108.881 29.8868Z" fill="#2F2828"/>
+<path d="M61.0197 26.9225L61.8629 26.9102C61.7079 28.0991 61.2332 30.0627 60.9722 31.3099L59.8503 31.3086C59.519 30.3592 59.2069 29.3429 58.8931 28.3815L58.2722 31.3125L57.3802 31.3049C57.7123 30.0129 58.0673 28.24 58.3208 26.9184L59.4601 26.922C59.6904 27.8033 60.1149 29.0009 60.4008 29.8927C60.5467 28.9635 60.7999 27.8383 61.0197 26.9225Z" fill="#2F2828"/>
+<path d="M78.6518 26.9215L79.5294 26.9146C79.4255 27.4595 79.2959 28.0172 79.1766 28.5603C79.689 28.553 80.216 28.5592 80.7298 28.5592L81.0951 26.923L81.9493 26.9141C81.8519 27.9269 81.2576 30.0868 81.0526 31.1643C81.0343 31.2615 80.9867 31.26 80.8865 31.3094C80.6281 31.3129 80.44 31.3262 80.1889 31.262C80.2658 30.6683 80.4253 30.0042 80.5534 29.4127L78.998 29.4118C78.867 30.0925 78.7586 30.6456 78.5669 31.3166L77.7339 31.3159C77.9893 29.9039 78.3363 28.3198 78.6518 26.9215Z" fill="#2F2828"/>
+<path d="M103.391 26.918L106.201 26.9222L106.032 27.7871C105.48 27.7389 104.623 27.7531 104.059 27.7493C104.008 28.0771 103.939 28.4261 103.88 28.7546L105.576 28.7521L105.445 29.4786C105.093 29.4693 104.014 29.408 103.727 29.5427L103.677 29.7236L103.488 30.4471L105.46 30.4415C105.391 30.7111 105.332 31.0336 105.273 31.3098C104.347 31.2889 103.359 31.3061 102.428 31.3067C102.714 29.9523 103.028 28.2233 103.391 26.918Z" fill="#2F2828"/>
+<path d="M101.23 26.8806C101.741 26.8186 102.269 26.978 102.715 27.2175C102.67 27.4649 102.637 27.8569 102.466 28.0164C102.325 28.0441 101.618 27.7141 101.272 27.6162C100.683 27.7595 100.181 27.9029 99.8684 28.4645C99.2265 29.6163 99.5405 30.8072 101.032 30.4857C101.475 30.0635 101.026 29.4324 101.687 29.1473C101.888 29.1663 102.02 29.1878 102.216 29.2257C102.312 29.5647 101.987 30.9407 101.742 31.0531C97.9931 32.7738 97.5708 27.2933 101.23 26.8806Z" fill="#2F2828"/>
+<path d="M74.9385 26.9214C75.1712 26.9118 75.4808 26.8744 75.6821 26.9707C75.7905 27.2226 75.7246 27.2838 75.6726 27.6035C75.3345 28.829 75.382 30.2578 74.2211 31.0737C73.6941 31.4969 72.454 31.4555 72.0957 30.8256C71.57 29.9017 72.2194 27.9607 72.4365 26.9236L73.3245 26.923C73.2315 27.4568 72.5294 29.9806 72.8643 30.2786C74.3522 31.6025 74.7181 27.8186 74.9385 26.9214Z" fill="#2F2828"/>
+<path d="M64.4934 26.8798C65.0658 26.8499 65.4038 26.9622 65.9183 27.1614C65.9004 27.4821 65.8231 27.8782 65.7694 28.201C65.3237 27.8267 65.0369 27.7669 64.4898 27.6111C64.0346 27.7299 63.4555 27.898 63.1815 28.3015C62.8659 28.7125 62.5666 30.01 63.1207 30.2988C64.5127 31.0242 64.4083 30.3038 64.6865 29.2341C64.6957 29.1988 65.0789 29.1547 65.1737 29.1403L65.443 29.2169C65.5798 29.5824 65.2474 30.6016 65.1325 31.0264C64.7903 31.1835 64.4256 31.2859 64.0516 31.3298C60.9761 31.6856 61.3322 27.1955 64.4934 26.8798Z" fill="#2F2828"/>
+<path d="M85.1552 26.9215L86.2297 26.918C85.7693 27.4771 85.3097 28.0605 84.8551 28.6258C84.028 29.5226 84.0163 30.1406 83.7762 31.3103L82.8773 31.3089C83.4446 29.0983 83.1291 29.0171 82.3298 26.9199L83.3107 26.9197C83.512 27.4507 83.7059 27.9844 83.8926 28.5204L85.1552 26.9215Z" fill="#2F2828"/>
+<path d="M139.373 26.9247L140.422 26.918C140.11 27.4009 139.441 28.178 139.059 28.6479C138.207 29.6578 138.305 30.0537 137.985 31.3112L137.113 31.3094C137.262 30.7606 137.396 30.0375 137.516 29.4702C137.197 28.6188 136.873 27.7696 136.543 26.9227L137.516 26.921C137.728 27.4476 137.932 27.9767 138.13 28.5083C138.556 27.9893 138.97 27.4613 139.373 26.9247Z" fill="#2F2828"/>
+<path d="M57.3993 4.67527C58.1061 4.65383 58.8637 4.66377 59.5748 4.66016C59.8347 5.63537 59.8946 6.41442 59.9652 7.40979C59.3798 7.36896 58.4268 7.39837 57.8139 7.39757C57.7331 6.3945 57.6463 5.64817 57.3993 4.67527Z" fill="#2F2828"/>
+<path d="M133.406 26.9219L136.447 26.9253L136.333 27.7751C135.986 27.7619 135.585 27.7671 135.234 27.7638C135.054 28.5778 134.891 29.4212 134.722 30.2397L134.468 31.3148L133.589 31.3145C133.858 30.1379 134.11 28.9573 134.343 27.7731C134.007 27.7561 133.613 27.7725 133.273 27.7783L133.406 26.9219Z" fill="#2F2828"/>
+<path d="M53.4287 26.918L54.3232 26.9254L53.5875 30.453L55.5179 30.4498L55.3763 31.3123C54.4204 31.2926 53.4227 31.3031 52.4631 31.2988C52.7142 30.6151 53.2746 27.7241 53.4287 26.918Z" fill="#2F2828"/>
+<path d="M128.859 26.924L129.753 26.9219C129.475 28.0093 129.226 29.3489 128.993 30.4563L130.915 30.4496L130.763 31.3133C129.848 31.2883 128.851 31.3078 127.93 31.3087L128.859 26.924Z" fill="#2F2828"/>
+<path d="M127.308 26.9204L128.164 26.918L127.239 31.3152L126.351 31.3151C126.65 29.8952 126.949 28.3149 127.308 26.9204Z" fill="#2F2828"/>
+<path d="M56.7724 26.918L57.6656 26.9141C57.3133 28.3287 57.0132 29.8795 56.7123 31.3129L55.8318 31.3086C56.1293 29.8417 56.4429 28.3781 56.7724 26.918Z" fill="#2F2828"/>
+<path d="M70.8595 26.9214L71.7381 26.918C71.567 28.0722 71.0941 30.1443 70.8119 31.3022L69.9707 31.3105C70.1852 29.9437 70.5812 28.3064 70.8595 26.9214Z" fill="#2F2828"/>
+<path d="M132.146 26.9187L133.056 26.918C132.809 28.082 132.418 30.2402 132.087 31.3152L131.25 31.3052C131.533 29.8444 131.902 28.3846 132.146 26.9187Z" fill="#2F2828"/>
+</svg>
diff --git a/vehicle-data-platform/apps/web/src/v2/auth/AuthGate.tsx b/vehicle-data-platform/apps/web/src/v2/auth/AuthGate.tsx
index be9cd7c1..21746ad2 100644
--- a/vehicle-data-platform/apps/web/src/v2/auth/AuthGate.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/auth/AuthGate.tsx
@@ -52,10 +52,10 @@ export function AuthGate({ children }: { children: ReactNode }) {
   };
 
   if (session.isPending) {
-    return <div className="v2-auth-screen"><div className="v2-auth-card"><i className="v2-auth-spinner" /><strong>正在验证访问身份…</strong></div></div>;
+    return <div className="v2-auth-screen"><div className="v2-auth-card"><img className="v2-auth-logo" src="/brand-logo.svg" alt="灵牛智能" /><i className="v2-auth-spinner" /><strong>正在验证访问身份…</strong></div></div>;
   }
   if (!session.data) {
-    return <div className="v2-auth-screen"><form className="v2-auth-card" onSubmit={login}><div className="v2-auth-mark">车</div><h1>车辆数据中台</h1><p>请输入运维人员分配的访问令牌。令牌仅保存在当前浏览器会话中。</p><label><span>访问令牌</span><input autoFocus required type="password" autoComplete="current-password" value={draftToken} onChange={(event) => setDraftToken(event.target.value)} placeholder="Bearer token" /></label>{attempted && session.error ? <em>{session.error.message}</em> : null}<button type="submit" disabled={!draftToken.trim()}>进入平台</button></form></div>;
+    return <div className="v2-auth-screen"><form className="v2-auth-card" onSubmit={login}><img className="v2-auth-logo" src="/brand-logo.svg" alt="灵牛智能" /><h1>车辆数据中台</h1><p>请输入运维人员分配的访问令牌。令牌仅保存在当前浏览器会话中。</p><label><span>访问令牌</span><input autoFocus required type="password" autoComplete="current-password" value={draftToken} onChange={(event) => setDraftToken(event.target.value)} placeholder="Bearer token" /></label>{attempted && session.error ? <em>{session.error.message}</em> : null}<button type="submit" disabled={!draftToken.trim()}>进入平台</button></form></div>;
   }
   return <AuthContext.Provider value={{ session: session.data, logout }}>{children}</AuthContext.Provider>;
 }
diff --git a/vehicle-data-platform/apps/web/src/v2/bootRecovery.test.ts b/vehicle-data-platform/apps/web/src/v2/bootRecovery.test.ts
index 339f72c1..70f2fe3a 100644
--- a/vehicle-data-platform/apps/web/src/v2/bootRecovery.test.ts
+++ b/vehicle-data-platform/apps/web/src/v2/bootRecovery.test.ts
@@ -4,7 +4,7 @@ import indexSource from '../../index.html?raw';
 const bootScript = indexSource.match(/<script>\s*([\s\S]*?vehicle-platform:ready[\s\S]*?)<\/script>/)?.[1];
 
 function mountBootShell() {
-  document.body.innerHTML = '<div id="root"><div id="platform-boot" role="status"><div><span class="platform-boot-mark">车</span><strong>车辆数据中台</strong><small>正在加载工作台…</small></div></div></div>';
+  document.body.innerHTML = '<div id="root"><div id="platform-boot" role="status"><div><img class="platform-boot-logo" src="/brand-logo.svg" alt="灵牛智能"><strong>车辆数据中台</strong><small>正在加载工作台…</small></div></div></div>';
   expect(bootScript).toBeTruthy();
   Function(bootScript!)();
 }
diff --git a/vehicle-data-platform/apps/web/src/v2/layout/AppShell.tsx b/vehicle-data-platform/apps/web/src/v2/layout/AppShell.tsx
index 7c5d8ea6..6f55cae5 100644
--- a/vehicle-data-platform/apps/web/src/v2/layout/AppShell.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/layout/AppShell.tsx
@@ -99,9 +99,9 @@ function Sidebar() {
 
   return (
     <aside className={`v2-sidebar${collapsed ? ' is-collapsed' : ''}`}>
-        <div className="v2-brand">
-          <span className="v2-brand-mark"><IconBox size="large" /></span>
-          <strong>车辆数据中台</strong>
+        <div className="v2-brand" aria-label="灵牛智能车辆数据中台">
+          <img className="v2-brand-logo" src="/brand-logo.svg" alt="灵牛智能" />
+          <img className="v2-brand-symbol" src="/brand-mark.svg" alt="" aria-hidden="true" />
         </div>
         <nav className="v2-navigation" aria-label="主导航">
           {navigation.map(({ to, label, icon: Icon }) => (
diff --git a/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts b/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
index 69ee9472..48099b0f 100644
--- a/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
+++ b/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
@@ -15,6 +15,8 @@ describe('V2 production entry', () => {
 
   test('renders a static boot shell and recovers when the React entry never becomes ready', () => {
     expect(indexSource).toContain('id="platform-boot"');
+    expect(indexSource).toContain('rel="icon" type="image/svg+xml" href="/brand-mark.svg"');
+    expect(indexSource).toContain('class="platform-boot-logo" src="/brand-logo.svg"');
     expect(indexSource).toContain("window.addEventListener('error', fail, true)");
     expect(indexSource).toContain("window.addEventListener('unhandledrejection', fail)");
     expect(indexSource).toContain('window.setTimeout(fail, 10_000)');
diff --git a/vehicle-data-platform/apps/web/src/v2/styles/v2.css b/vehicle-data-platform/apps/web/src/v2/styles/v2.css
index 22025f19..de85ef81 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/v2.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/v2.css
@@ -20,7 +20,8 @@ button, a { -webkit-tap-highlight-color: transparent; }
 
 .v2-auth-screen { display: grid; min-height: 100vh; place-items: center; background: radial-gradient(circle at 50% 10%, #edf4ff 0, #f4f7fb 42%, #eef2f7 100%); padding: 20px; }
 .v2-auth-card { display: flex; width: min(390px, 100%); flex-direction: column; align-items: stretch; border: 1px solid var(--v2-border); border-radius: 16px; background: #fff; padding: 34px; box-shadow: 0 22px 70px rgba(21, 32, 51, .12); }
-.v2-auth-card > strong { margin-top: 12px; text-align: center; }.v2-auth-mark { display: grid; width: 46px; height: 46px; margin: 0 auto 16px; place-items: center; border-radius: 13px; background: var(--v2-blue); color: #fff; font-size: 20px; font-weight: 800; box-shadow: 0 9px 20px rgba(18, 104, 243, .22); }
+.v2-auth-card > strong { margin-top: 12px; text-align: center; }
+.v2-auth-logo { display: block; width: 150px; height: auto; margin: 0 auto 18px; }
 .v2-auth-card h1 { margin: 0; text-align: center; font-size: 22px; }.v2-auth-card p { margin: 10px 0 24px; color: var(--v2-muted); text-align: center; font-size: 12px; line-height: 1.7; }
 .v2-auth-card label { display: flex; flex-direction: column; gap: 7px; color: #58667a; font-size: 12px; font-weight: 600; }.v2-auth-card input { height: 40px; border: 1px solid #d7e0ec; border-radius: 8px; padding: 0 11px; outline: 0; }.v2-auth-card input:focus { border-color: #8bb6fb; box-shadow: 0 0 0 3px rgba(18,104,243,.08); }
 .v2-auth-card em { margin-top: 9px; color: var(--v2-red); font-size: 11px; font-style: normal; }.v2-auth-card button { height: 40px; margin-top: 18px; border: 0; border-radius: 8px; background: var(--v2-blue); color: #fff; cursor: pointer; font-weight: 700; }.v2-auth-card button:disabled { opacity: .45; cursor: not-allowed; }
@@ -28,9 +29,9 @@ button, a { -webkit-tap-highlight-color: transparent; }
 
 .v2-shell { height: 100vh; height: 100dvh; overflow: hidden; background: var(--v2-bg); }
 .v2-sidebar { position: fixed; inset: 0 auto 0 0; z-index: 50; contain: layout paint; display: flex; width: 188px; flex-direction: column; border-right: 1px solid var(--v2-border); background: #fff; }
-.v2-brand { display: flex; height: 64px; align-items: center; gap: 11px; border-bottom: 1px solid var(--v2-border); padding: 0 16px; white-space: nowrap; overflow: hidden; }
-.v2-brand strong { font-size: 16px; letter-spacing: -.02em; }
-.v2-brand-mark { display: grid; width: 34px; height: 34px; flex: 0 0 34px; place-items: center; border-radius: 9px; background: var(--v2-blue); color: #fff; box-shadow: 0 6px 14px rgba(18, 104, 243, .22); }
+.v2-brand { display: flex; height: 64px; align-items: center; border-bottom: 1px solid var(--v2-border); padding: 0 16px; white-space: nowrap; overflow: hidden; }
+.v2-brand-logo { display: block; width: 140px; height: auto; flex: 0 0 auto; }
+.v2-brand-symbol { display: none; width: 36px; height: auto; flex: 0 0 36px; }
 .v2-navigation { display: flex; flex: 1; flex-direction: column; gap: 4px; padding: 14px 10px; }
 .v2-nav-item { position: relative; display: flex; height: 44px; align-items: center; gap: 12px; border-radius: 8px; padding: 0 14px; color: #59677c; text-decoration: none; white-space: nowrap; overflow: hidden; font-size: 13px; font-weight: 600; transition: background .16s, color .16s; }
 .v2-nav-item:hover { background: #f7f9fc; color: var(--v2-text); }
@@ -61,8 +62,10 @@ button, a { -webkit-tap-highlight-color: transparent; }
 .v2-content { min-width: 0; min-height: 0; flex: 1; overflow: auto; }
 .v2-sidebar.is-collapsed { width: 68px; }
 .v2-sidebar.is-collapsed + .v2-main { margin-left: 68px; }
-.v2-sidebar.is-collapsed .v2-brand strong, .v2-sidebar.is-collapsed .v2-nav-label, .v2-sidebar.is-collapsed .v2-collapse span { display: none; }
-.v2-sidebar.is-collapsed .v2-brand { padding: 0 17px; }
+.v2-sidebar.is-collapsed .v2-nav-label, .v2-sidebar.is-collapsed .v2-collapse span { display: none; }
+.v2-sidebar.is-collapsed .v2-brand { justify-content: center; padding: 0; }
+.v2-sidebar.is-collapsed .v2-brand-logo { display: none; }
+.v2-sidebar.is-collapsed .v2-brand-symbol { display: block; }
 .v2-sidebar.is-collapsed .v2-nav-item { justify-content: center; padding: 0; }
 .v2-sidebar.is-collapsed .v2-collapse { justify-content: center; padding: 0; transform: rotate(180deg); }
 
@@ -925,8 +928,10 @@ button, a { -webkit-tap-highlight-color: transparent; }
 @media (max-width: 900px) {
   .v2-sidebar { width: 68px; }
   .v2-main { margin-left: 68px; }
-  .v2-brand strong, .v2-nav-label, .v2-collapse span { display: none; }
-  .v2-brand { padding: 0 17px; }
+  .v2-nav-label, .v2-collapse span { display: none; }
+  .v2-brand { justify-content: center; padding: 0; }
+  .v2-brand-logo { display: none; }
+  .v2-brand-symbol { display: block; }
   .v2-nav-item { justify-content: center; padding: 0; }
   .v2-filterbar { grid-template-columns: 1fr 1fr; }
   .v2-search-field { grid-column: 1 / -1; }
