diff --git a/web/download/index.html b/web/download/index.html
index 782a35f..037c8e4 100644
--- a/web/download/index.html
+++ b/web/download/index.html
@@ -3,50 +3,145 @@
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>Ponshu Room</title>
-  <meta name="description" content="日本酒コレクションアプリ">
+  <title>Ponshu Room - ダウンロード</title>
+  <meta name="description" content="日本酒コレクションアプリ - 撮って、記録して、味わう">
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500&family=Noto+Serif+JP:wght@400;500&display=swap" rel="stylesheet">
   <link rel="stylesheet" href="style.css">
   <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>🍶</text></svg>">
+  <style>
+    .user-select-overlay {
+      position: fixed;
+      top: 0; left: 0;
+      width: 100%; height: 100%;
+      background: rgba(74, 59, 50, 0.95);
+      backdrop-filter: blur(10px);
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      z-index: 1000;
+      opacity: 1;
+      transition: opacity 0.3s var(--ease-out);
+    }
+    .user-select-overlay.hidden {
+      opacity: 0;
+      pointer-events: none;
+    }
+    .user-select-box {
+      background: var(--washi-white);
+      border-radius: 24px;
+      padding: var(--space-xl);
+      max-width: 400px;
+      width: 90%;
+      text-align: center;
+    }
+    .user-select-title {
+      font-family: var(--font-serif);
+      font-size: 1.5rem;
+      margin-bottom: var(--space-lg);
+      color: var(--sumi-black);
+    }
+    .user-buttons {
+      display: flex;
+      gap: var(--space-md);
+      margin-bottom: var(--space-md);
+    }
+    .user-button {
+      flex: 1;
+      padding: var(--space-lg);
+      background: white;
+      border: 2px solid var(--gray-200);
+      border-radius: 16px;
+      font-family: var(--font-sans);
+      font-size: 1.125rem;
+      font-weight: 500;
+      color: var(--sumi-black);
+      cursor: pointer;
+      transition: all 0.3s var(--ease-out);
+    }
+    .user-button:hover {
+      border-color: var(--kohaku-gold);
+      transform: translateY(-2px);
+      box-shadow: 0 12px 24px -8px rgba(74, 59, 50, 0.15);
+    }
+    .user-select-note {
+      font-size: 0.75rem;
+      color: var(--gray-400);
+      margin-top: var(--space-md);
+    }
+    .version-card.disabled {
+      opacity: 0.5;
+      pointer-events: none;
+    }
+    .info-banner {
+      background: rgba(212, 165, 116, 0.1);
+      border: 1px solid var(--kohaku-gold);
+      border-radius: 12px;
+      padding: var(--space-sm) var(--space-md);
+      text-align: center;
+    }
+    .info-banner-user {
+      font-weight: 500;
+      color: var(--kohaku-gold);
+    }
+    .change-user-btn {
+      display: inline-block;
+      margin-top: var(--space-xs);
+      font-size: 0.75rem;
+      color: var(--kohaku-gold);
+      text-decoration: underline;
+      cursor: pointer;
+    }
+    .change-user-btn:hover { color: var(--kohaku-deep); }
+    .card-version {
+      font-size: 0.7rem;
+      color: var(--gray-400);
+      letter-spacing: 0.04em;
+    }
+    @media (prefers-color-scheme: dark) {
+      .user-select-box { background: #1E1E1E; }
+      .user-button { background: #2A2A2A; border-color: #3A3A3A; color: var(--sumi-black); }
+      .info-banner { background: rgba(212, 165, 116, 0.15); }
+    }
+  </style>
 </head>
 <body>
+  <!-- User Selection Overlay -->
+  <div id="userSelectOverlay" class="user-select-overlay">
+    <div class="user-select-box">
+      <h2 class="user-select-title">ユーザーを選択</h2>
+      <div class="user-buttons">
+        <button class="user-button" onclick="selectUser('maita')">Mai</button>
+        <button class="user-button" onclick="selectUser('eiji')">Eiji</button>
+      </div>
+      <p class="user-select-note">あなた専用のAPKをダウンロードします</p>
+    </div>
+  </div>
+
   <div class="container">
-    <!-- Hero Section -->
+    <!-- Hero -->
     <header class="hero">
       <div class="logo">
-        <svg class="sake-icon" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
-          <path d="M24 4L28 12H20L24 4Z" fill="currentColor" opacity="0.6"/>
-          <path d="M16 12H32V16C32 18 30 20 30 24V40C30 42 28 44 24 44C20 44 18 42 18 40V24C18 20 16 18 16 16V12Z" fill="currentColor"/>
-          <ellipse cx="24" cy="32" rx="4" ry="2" fill="currentColor" opacity="0.3"/>
-        </svg>
+        <span class="sake-icon" role="img" aria-label="日本酒">🍶</span>
         <h1>Ponshu Room</h1>
       </div>
       <p class="tagline">日本酒を撮って、記録して、味わう</p>
     </header>
 
-    <!-- App Preview -->
-    <section class="preview">
-      <div class="phone-frame">
-        <div class="screen-placeholder">
-          <div class="grid-preview">
-            <div class="grid-item"></div>
-            <div class="grid-item"></div>
-            <div class="grid-item"></div>
-            <div class="grid-item"></div>
-            <div class="grid-item"></div>
-            <div class="grid-item"></div>
-          </div>
-        </div>
+    <!-- User Info Banner -->
+    <div id="infoBanner" class="info-banner" style="display: none;">
+      <div class="info-banner-user">
+        <span id="currentUserName"></span> 用のAPK &nbsp;·&nbsp; <span id="releaseDate"></span>
       </div>
-    </section>
+      <a class="change-user-btn" onclick="changeUser()">ユーザーを変更</a>
+    </div>
 
     <!-- Download Section -->
     <section class="download">
       <div class="version-cards">
-        <!-- Lite Version -->
-        <a href="https://github.com/YOUR_REPO/releases/download/v1.0.12/ponshu-room-lite.apk" class="version-card" download>
+        <!-- Lite -->
+        <a id="liteDownload" href="#" class="version-card" download>
           <div class="card-header">
             <span class="version-name">Lite</span>
             <span class="version-badge free">Free</span>
@@ -56,11 +151,12 @@
               <path d="M12 3v12m0 0l-4-4m4 4l4-4M5 17v2a2 2 0 002 2h10a2 2 0 002-2v-2"/>
             </svg>
           </div>
-          <span class="file-size">88 MB</span>
+          <span class="card-version" id="liteVersion"></span>
+          <span class="file-size" id="liteSize">90 MB</span>
         </a>
 
-        <!-- Pro Version -->
-        <a href="https://github.com/YOUR_REPO/releases/download/v1.0.12/ponshu-room-pro.apk" class="version-card pro" download>
+        <!-- Pro -->
+        <a id="proDownload" href="#" class="version-card pro" download>
           <div class="card-header">
             <span class="version-name">Pro</span>
             <span class="version-badge pro-badge">Pro</span>
@@ -70,14 +166,15 @@
               <path d="M12 3v12m0 0l-4-4m4 4l4-4M5 17v2a2 2 0 002 2h10a2 2 0 002-2v-2"/>
             </svg>
           </div>
-          <span class="file-size">89 MB</span>
+          <span class="card-version" id="proVersion"></span>
+          <span class="file-size" id="proSize">90 MB</span>
         </a>
       </div>
 
-      <p class="platform-note">Android 8.0+</p>
+      <p class="platform-note">Android 8.0+ (API Level 24)</p>
     </section>
 
-    <!-- Features (Icons Only) -->
+    <!-- Features -->
     <section class="features">
       <div class="feature">
         <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
@@ -106,11 +203,104 @@
         <span>マップ</span>
       </div>
     </section>
-
-    <!-- Footer -->
-    <footer>
-      <p>v1.0.12</p>
-    </footer>
   </div>
+
+  <script>
+    let currentUser = null;
+    let releaseData = null;
+
+    // releases.json から動的にデータを取得
+    async function loadReleases() {
+      try {
+        const res = await fetch('releases.json?t=' + Date.now());
+        releaseData = await res.json();
+        applyReleaseData();
+      } catch (e) {
+        // フォールバック: 固定値
+        releaseData = {
+          version: 'v1.0.16',
+          date: '2026-02-23',
+          apks: {
+            maita: {
+              lite: { url: 'https://posimai-lab.tail72e846.ts.net/mai/ponshu-room-lite/releases/download/v1.0.16/ponshu_room_lite_maita.apk', size_mb: 90 },
+              pro:  { url: 'https://posimai-lab.tail72e846.ts.net/mai/ponshu-room-lite/releases/download/v1.0.16/ponshu_room_pro_maita.apk',  size_mb: 90 }
+            },
+            eiji: {
+              lite: { url: 'https://posimai-lab.tail72e846.ts.net/mai/ponshu-room-lite/releases/download/v1.0.16/ponshu_room_lite_eiji.apk', size_mb: 90 },
+              pro:  { url: 'https://posimai-lab.tail72e846.ts.net/mai/ponshu-room-lite/releases/download/v1.0.16/ponshu_room_pro_eiji.apk',  size_mb: 90 }
+            }
+          }
+        };
+        applyReleaseData();
+      }
+    }
+
+    function applyReleaseData() {
+      if (!releaseData) return;
+      document.getElementById('liteVersion').textContent = releaseData.version;
+      document.getElementById('proVersion').textContent  = releaseData.version;
+      document.getElementById('liteSize').textContent = releaseData.apks.eiji?.lite?.size_mb + ' MB' || '90 MB';
+      document.getElementById('proSize').textContent  = releaseData.apks.eiji?.pro?.size_mb  + ' MB' || '90 MB';
+      document.getElementById('releaseDate').textContent = releaseData.date;
+      if (currentUser) updateDownloadLinks();
+    }
+
+    function selectUser(user) {
+      currentUser = user;
+      localStorage.setItem('ponshu_user', user);
+      updateDownloadLinks();
+      hideUserSelect();
+    }
+
+    function changeUser() { showUserSelect(); }
+
+    function updateDownloadLinks() {
+      if (!currentUser || !releaseData) return;
+      const apks = releaseData.apks[currentUser];
+      const nameMap = { maita: 'Mai', eiji: 'Eiji' };
+
+      // Lite
+      if (apks?.lite?.url) {
+        document.getElementById('liteDownload').href = apks.lite.url;
+        document.getElementById('liteDownload').classList.remove('disabled');
+      }
+
+      // Pro（存在しない場合は非表示）
+      const proCard = document.getElementById('proDownload');
+      if (apks?.pro?.url) {
+        proCard.href = apks.pro.url;
+        proCard.style.display = '';
+      } else {
+        proCard.style.display = 'none';
+      }
+
+      document.getElementById('currentUserName').textContent = nameMap[currentUser] || currentUser;
+      document.getElementById('infoBanner').style.display = 'block';
+    }
+
+    function showUserSelect() {
+      document.getElementById('userSelectOverlay').classList.remove('hidden');
+    }
+    function hideUserSelect() {
+      document.getElementById('userSelectOverlay').classList.add('hidden');
+    }
+
+    window.addEventListener('DOMContentLoaded', async () => {
+      await loadReleases();
+      const savedUser = localStorage.getItem('ponshu_user');
+      if (savedUser === 'maita' || savedUser === 'eiji') {
+        selectUser(savedUser);
+      } else {
+        showUserSelect();
+      }
+    });
+
+    document.getElementById('liteDownload').addEventListener('click', (e) => {
+      if (!currentUser) { e.preventDefault(); showUserSelect(); }
+    });
+    document.getElementById('proDownload').addEventListener('click', (e) => {
+      if (!currentUser) { e.preventDefault(); showUserSelect(); }
+    });
+  </script>
 </body>
 </html>
