diff --git a/platform/frontend/articles.html b/platform/frontend/articles.html
index 4a027dc..c00420f 100644
--- a/platform/frontend/articles.html
+++ b/platform/frontend/articles.html
@@ -7,29 +7,14 @@
     <link rel="stylesheet" href="element-plus.css">
     <link rel="stylesheet" href="theme-modern.css">
     <style>
-        .search-bar { margin-left: auto; width: 240px; }
-
-        .status-dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; }
-        .status-dot.draft { background: #E6A23C; }
-        .status-dot.reviewed { background: #67C23A; }
-        .status-dot.published { background: #409EFF; }
-
         .article-card-list { display: none; }
-
         @media (max-width: 768px) {
-            .el-table { display: none; }
             .article-card-list { display: block; }
-            .article-card {
-                background: white;
-                border-radius: 12px;
-                padding: 12px;
-                margin-bottom: 12px;
-                box-shadow: 0 2px 8px rgba(0,0,0,0.08);
-            }
+            .article-card { background: var(--color-bg-raised); border-radius: var(--radius-md); padding: 12px; margin-bottom: 12px; box-shadow: var(--shadow-sm); }
             .article-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
-            .article-card-title { font-size: 14px; font-weight: 600; color: #303133; flex: 1; margin-right: 8px; }
-            .article-card-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: 12px; color: #606266; margin-bottom: 12px; }
-            .article-card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid #ebeef5; }
+            .article-card-title { font-size: var(--font-size-body); font-weight: 600; color: var(--color-text-primary); flex: 1; margin-right: 8px; }
+            .article-card-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: var(--font-size-caption); color: var(--color-text-regular); margin-bottom: 12px; }
+            .article-card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--color-border); }
             .article-card-actions .el-button { margin: 0; width: 100%; justify-content: center; }
             .search-bar { width: 100%; margin-left: 0; }
         }
diff --git a/platform/frontend/index.html b/platform/frontend/index.html
index b977c97..c3b2f51 100644
--- a/platform/frontend/index.html
+++ b/platform/frontend/index.html
@@ -7,134 +7,24 @@
     <link rel="stylesheet" href="element-plus.css">
     <link rel="stylesheet" href="theme-modern.css">
     <style>
-        /* 仪表盘统计卡片 */
         .page { display: none; animation: fadeIn 0.5s ease-out; }
         .page.active { display: block; }
         @keyframes fadeIn {
             from { opacity: 0; transform: translateY(20px); }
             to { opacity: 1; transform: translateY(0); }
         }
-
-        .stats-grid {
-            display: grid;
-            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
-            gap: 20px;
-            margin-bottom: 40px;
-        }
-        .stat-card {
-            background: white;
-            border: 1px solid #ebeef5;
-            border-radius: 16px;
-            padding: 24px;
-            cursor: pointer;
-            transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
-            position: relative;
-            overflow: hidden;
-        }
-        .stat-card:hover {
-            transform: translateY(-8px) scale(1.02);
-            border-color: #c6d8ff;
-            box-shadow: 0 12px 32px rgba(102, 126, 234, 0.15);
-        }
-        .stat-title {
-            font-size: 13px;
-            color: #909399;
-            margin-bottom: 12px;
-            text-transform: uppercase;
-            letter-spacing: 0.5px;
-            font-weight: 500;
-        }
-        .stat-value {
-            font-size: 36px;
-            font-weight: 800;
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-            -webkit-background-clip: text;
-            -webkit-text-fill-color: transparent;
-            background-clip: text;
-            line-height: 1.2;
-        }
-        .stat-card.primary .stat-value { background: linear-gradient(135deg, #667eea, #764ba2); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
-        .stat-card.success .stat-value { background: linear-gradient(135deg, #67c23a, #85e61d); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
-        .stat-card.warning .stat-value { background: linear-gradient(135deg, #e6a23c, #f5c543); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
-        .stat-card.danger .stat-value { background: linear-gradient(135deg, #f56c6c, #f79296); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
-        .stat-card.info .stat-value { background: linear-gradient(135deg, #409eff, #5cd0f3); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
-
-        /* 模块卡片 */
-        .module-grid {
-            display: grid;
-            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
-            gap: 20px;
-        }
-        .module-card {
-            background: white;
-            border: 1px solid #ebeef5;
-            border-radius: 16px;
-            padding: 24px;
-            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
-        }
-        .module-card:hover {
-            transform: translateY(-6px);
-            border-color: #c6d8ff;
-            box-shadow: 0 8px 24px rgba(0,0,0,0.08);
-        }
-        .module-header {
-            display: flex;
-            justify-content: space-between;
-            align-items: center;
-            margin-bottom: 16px;
-        }
-        .module-title {
-            font-size: 16px;
-            font-weight: 600;
-            color: #303133;
-            display: flex;
-            align-items: center;
-            gap: 8px;
-        }
-        .module-status {
-            padding: 6px 12px;
-            border-radius: 20px;
-            font-size: 12px;
-            font-weight: 600;
-            background: rgba(103, 194, 58, 0.12);
-            color: #67c23a;
-            border: 1px solid rgba(103, 194, 58, 0.25);
-        }
-        .module-status.running {
-            animation: pulse-glow 2s infinite;
-        }
-        .module-content {
-            font-size: 14px;
-            color: #606266;
-            line-height: 1.8;
-        }
-        .module-content div {
-            display: flex;
-            justify-content: space-between;
-            padding: 4px 0;
-            border-bottom: 1px dashed #f0f0f0;
-        }
+        .module-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-lg); }
+        .module-card { background: var(--color-bg-raised); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--spacing-lg); transition: all 0.3s var(--ease-out); }
+        .module-card:hover { transform: translateY(-6px); border-color: var(--color-border-hover); box-shadow: var(--shadow-lg); }
+        .module-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--spacing-md); }
+        .module-title { font-size: var(--font-size-h3); font-weight: 600; color: var(--color-text-primary); display: flex; align-items: center; gap: var(--spacing-sm); }
+        .module-status { padding: 6px 12px; border-radius: var(--radius-xl); font-size: var(--font-size-caption); font-weight: 600; background: rgba(103,194,58,0.12); color: #67c23a; border: 1px solid rgba(103,194,58,0.25); }
+        .module-status.running { animation: pulse-glow 2s infinite; }
+        .module-content { font-size: var(--font-size-body); color: var(--color-text-regular); line-height: 1.8; }
+        .module-content div { display: flex; justify-content: space-between; padding: 4px 0; border-bottom: 1px dashed var(--color-border); }
         .module-content div:last-child { border-bottom: none; }
-
-        @media (max-width: 768px) {
-            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
-            .stat-card { padding: 16px; }
-            .stat-value { font-size: 24px; }
-            .module-grid { grid-template-columns: 1fr; }
-        }
-    </style>
-    <style>
-        body { background: #f5f7fa !important; color: #303133 !important; }
-        .navbar { background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%) !important; border-bottom: none !important; backdrop-filter: none !important; }
-        .navbar-title { background: none !important; -webkit-text-fill-color: white !important; color: white !important; }
-        .user-info { color: white !important; }
-        .avatar { background: rgba(255,255,255,0.2) !important; color: white !important; }
-        .sidebar { background: white !important; border-right: 1px solid #ebeef5 !important; backdrop-filter: none !important; }
-        
-        
-        
-        #page-overview h2, #page-overview h3, #page-overview .module-title { color: #303133 !important; }
-        #page-overview .module-content { color: #303133 !important; }
+        .stat-title { font-size: var(--font-size-small); color: var(--color-text-secondary); margin-bottom: var(--spacing-md); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 500; }
+        @media (max-width: 768px) { .module-grid { grid-template-columns: 1fr; } }
     </style>
 
     <script src="uni-nav.js"></script>
diff --git a/platform/frontend/login.html b/platform/frontend/login.html
index 41c70e0..5bc401d 100644
--- a/platform/frontend/login.html
+++ b/platform/frontend/login.html
@@ -5,218 +5,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>宇之然内容创作平台 - 登录</title>
   <link rel="stylesheet" href="element-plus.css">
-  <style>
-    /* 重置与基础样式 */
-    * { margin: 0; padding: 0; box-sizing: border-box; }
-    body {
-      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
-      /* 紫蓝渐变背景 */
-      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-      min-height: 100vh;
-      display: flex;
-      align-items: center;
-      justify-content: center;
-      overflow: hidden;
-      position: relative;
-    }
-
-    /* 背景动态装饰圆 */
-    .bg-circle {
-      position: absolute;
-      border-radius: 50%;
-      background: rgba(255, 255, 255, 0.1);
-      animation: float 20s infinite ease-in-out;
-    }
-    .bg-circle:nth-child(1) { width: 300px; height: 300px; top: -150px; left: -150px; animation-delay: 0s; }
-    .bg-circle:nth-child(2) { width: 200px; height: 200px; bottom: -100px; right: -100px; animation-delay: -5s; }
-    .bg-circle:nth-child(3) { width: 150px; height: 150px; top: 50%; right: 10%; animation-delay: -10s; }
-    .bg-circle:nth-child(4) { width: 100px; height: 100px; bottom: 20%; left: 5%; animation-delay: -15s; }
-
-    @keyframes float {
-      0%, 100% { transform: translate(0, 0) scale(1); }
-      25% { transform: translate(30px, -30px) scale(1.1); }
-      50% { transform: translate(-20px, 20px) scale(0.9); }
-      75% { transform: translate(20px, 30px) scale(1.05); }
-    }
-
-    /* 登录卡片 */
-    .login-card {
-      position: relative;
-      z-index: 10;
-      width: 100%;
-      max-width: 420px;
-      padding: 48px 40px;
-      background: rgba(255, 255, 255, 0.95);
-      backdrop-filter: blur(20px);
-      border-radius: 24px;
-      box-shadow:
-        0 20px 60px rgba(0, 0, 0, 0.3),
-        0 0 0 1px rgba(255, 255, 255, 0.2) inset;
-      animation: slide-up 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
-    }
-
-    @keyframes slide-up {
-      from {
-        opacity: 0;
-        transform: translateY(40px) scale(0.95);
-      }
-      to {
-        opacity: 1;
-        transform: translateY(0) scale(1);
-      }
-    }
-
-    .login-title {
-      text-align: center;
-      font-size: 28px;
-      font-weight: 700;
-      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-      -webkit-background-clip: text;
-      -webkit-text-fill-color: transparent;
-      background-clip: text;
-      margin-bottom: 40px;
-      letter-spacing: -0.5px;
-    }
-
-    .login-subtitle {
-      text-align: center;
-      color: #9ca3af;
-      font-size: 14px;
-      margin-top: -24px;
-      margin-bottom: 32px;
-    }
-
-    /* 表单样式 */
-    .form-group {
-      margin-bottom: 24px;
-      position: relative;
-    }
-
-    .form-input {
-      width: 100%;
-      padding: 14px 16px;
-      border: 2px solid #e5e7eb;
-      border-radius: 12px;
-      font-size: 16px;
-      color: #1f2937;
-      background: #f9fafb;
-      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
-      outline: none;
-    }
-
-    .form-input:focus {
-      border-color: #667eea;
-      background: #ffffff;
-      box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
-      transform: translateY(-2px);
-    }
-
-    .form-input:not(:placeholder-shown) {
-      border-color: #764ba2;
-    }
-
-    .form-label {
-      position: absolute;
-      left: 14px;
-      top: 50%;
-      transform: translateY(-50%);
-      color: #9ca3af;
-      pointer-events: none;
-      transition: all 0.2s ease;
-      font-size: 16px;
-      background: transparent;
-      padding: 0 4px;
-    }
-
-    .form-input:focus ~ .form-label,
-    .form-input:not(:placeholder-shown) ~ .form-label {
-      top: 0;
-      font-size: 12px;
-      color: #667eea;
-      background: #ffffff;
-    }
-
-    /* 登录按钮 */
-    .login-btn {
-      width: 100%;
-      padding: 14px;
-      margin-top: 8px;
-      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-      color: white;
-      border: none;
-      border-radius: 12px;
-      font-size: 16px;
-      font-weight: 600;
-      cursor: pointer;
-      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
-      position: relative;
-      overflow: hidden;
-    }
-
-    .login-btn:hover:not(:disabled) {
-      transform: translateY(-2px);
-      box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
-    }
-
-    .login-btn:active:not(:disabled) {
-      transform: translateY(0);
-    }
-
-    .login-btn:disabled {
-      opacity: 0.6;
-      cursor: not-allowed;
-      transform: none;
-    }
-
-    /* 按钮加载动画 */
-    .btn-loader {
-      display: inline-block;
-      width: 16px;
-      height: 16px;
-      border: 2px solid rgba(255, 255, 255, 0.3);
-      border-top-color: white;
-      border-radius: 50%;
-      animation: spin 0.8s linear infinite;
-      margin-right: 8px;
-      vertical-align: middle;
-    }
-
-    @keyframes spin {
-      to { transform: rotate(360deg); }
-    }
-
-    /* 底部信息 */
-    .login-footer {
-      text-align: center;
-      margin-top: 24px;
-      color: #6b7280;
-      font-size: 13px;
-    }
-
-    .login-footer a {
-      color: #667eea;
-      text-decoration: none;
-      transition: color 0.2s;
-    }
-
-    .login-footer a:hover {
-      color: #764ba2;
-    }
-
-    /* 响应式 */
-    @media (max-width: 480px) {
-      .login-card {
-        max-width: 90%;
-        padding: 32px 24px;
-        margin: 16px;
-        border-radius: 20px;
-      }
-      .login-title {
-        font-size: 24px;
-        margin-bottom: 24px;
-      }
-    }
-  </style>
+  <link rel="stylesheet" href="theme-modern.css">
 </head>
 <body>
   <!-- 背景装饰 -->
diff --git a/platform/frontend/metrics.html b/platform/frontend/metrics.html
index c269d69..875c179 100644
--- a/platform/frontend/metrics.html
+++ b/platform/frontend/metrics.html
@@ -28,14 +28,14 @@
         }
         .metrics-table { display: block; }
         .metrics-card-list { display: none; }
-        .metrics-card { background: white; border-radius: 10px; padding: 14px; margin-bottom: 10px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
+        .metrics-card { background: var(--color-bg-raised); border-radius: var(--radius-sm); padding: 14px; margin-bottom: 10px; box-shadow: var(--shadow-sm); }
         .metrics-card:active { transform: scale(0.99); }
-        .metrics-card-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; border-bottom: 1px dashed #f0f0f0; font-size: 13px; }
+        .metrics-card-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; border-bottom: 1px dashed var(--color-border); font-size: var(--font-size-small); }
         .metrics-card-row:last-child { border-bottom: none; }
-        .metrics-card-label { color: #909399; }
-        .metrics-card-value { color: #303133; font-weight: 500; }
-        .metrics-card-title { font-size: 15px; font-weight: 600; color: #303133; margin-bottom: 10px; }
-        .metrics-card-reason { font-size: 12px; color: #606266; margin-top: 6px; line-height: 1.5; }
+        .metrics-card-label { color: var(--color-text-secondary); }
+        .metrics-card-value { color: var(--color-text-primary); font-weight: 500; }
+        .metrics-card-title { font-size: var(--font-size-body); font-weight: 600; color: var(--color-text-primary); margin-bottom: 10px; }
+        .metrics-card-reason { font-size: var(--font-size-caption); color: var(--color-text-regular); margin-top: 6px; line-height: 1.5; }
     </style>
     <script src="uni-nav.js"></script>
     <script src="chart.umd.min.js"></script>
diff --git a/platform/frontend/theme-modern.css b/platform/frontend/theme-modern.css
index d77d26c..f019fe7 100644
--- a/platform/frontend/theme-modern.css
+++ b/platform/frontend/theme-modern.css
@@ -1,107 +1,234 @@
-/* Modern page fade-in */
-.page-fade { animation: fadeIn 0.4s ease-out; }
-@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
+/* ============================================
+  宇之然 · Design System
+  Inspired by opencode.ai — clean, modern, responsive
+  ============================================ */
 
-/* Enhanced cards */
-.card-modern { border-radius: 16px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
-.card-modern:hover { box-shadow: 0 8px 28px rgba(0,0,0,0.1); }
+/* ========== Design Tokens ========== */
+:root {
+  /* Colors */
+  --color-primary: #667eea;
+  --color-primary-dark: #5a6fd6;
+  --color-primary-light: #8b9cf0;
+  --color-accent: #764ba2;
+  --color-success: #67c23a;
+  --color-warning: #e6a23c;
+  --color-danger: #f56c6c;
+  --color-info: #909399;
 
-/* Gradient text */
-.text-gradient { background: linear-gradient(135deg, #2563eb, #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
-.text-gradient-primary { background: linear-gradient(135deg, #667eea, #764ba2); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
-.text-gradient-success { background: linear-gradient(135deg, #67c23a, #85e61d); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
-.text-gradient-warning { background: linear-gradient(135deg, #e6a23c, #f5c543); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
-.text-gradient-danger { background: linear-gradient(135deg, #f56c6c, #f79296); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
-.text-gradient-info { background: linear-gradient(135deg, #409eff, #5cd0f3); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+  --color-bg: #f5f7fa;
+  --color-bg-raised: #ffffff;
+  --color-bg-subtle: #f0f5ff;
+  --color-border: #ebeef5;
+  --color-border-hover: #c6d8ff;
 
-/* Pulse animation */
-@keyframes pulse-glow { 0%, 100% { box-shadow: 0 0 0 0 rgba(103, 194, 58, 0.4); } 50% { box-shadow: 0 0 0 8px rgba(103, 194, 58, 0); } }
+  --color-text-primary: #303133;
+  --color-text-regular: #606266;
+  --color-text-secondary: #909399;
+  --color-text-placeholder: #c0c4cc;
 
-/* Shimmer hover effect */
-.shimmer { position: relative; overflow: hidden; }
-.shimmer::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.06), transparent); transition: left 0.6s; }
-.shimmer:hover::before { left: 100%; }
+  /* Spacing */
+  --spacing-xs: 4px;
+  --spacing-sm: 8px;
+  --spacing-md: 16px;
+  --spacing-lg: 24px;
+  --spacing-xl: 32px;
+  --spacing-2xl: 48px;
 
-/* Elastic hover lift */
-.hover-lift { transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1); }
-.hover-lift:hover { transform: translateY(-6px) scale(1.02); }
+  /* Font scale */
+  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+  --font-size-h1: 28px;
+  --font-size-h2: 24px;
+  --font-size-h3: 18px;
+  --font-size-body: 14px;
+  --font-size-small: 13px;
+  --font-size-caption: 12px;
 
-/* Modern stat card */
-.stat-card-modern { border-radius: 16px; padding: 24px; cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); background: white; border: 1px solid #ebeef5; }
-.stat-card-modern:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); border-color: #c6d8ff; }
-.stat-card-modern .stat-value { font-size: 32px; font-weight: 800; line-height: 1.2; }
-.stat-card-modern .stat-label { font-size: 13px; color: #909399; margin-top: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
+  /* Border radius */
+  --radius-sm: 8px;
+  --radius-md: 12px;
+  --radius-lg: 16px;
+  --radius-xl: 20px;
+  --radius-full: 24px;
 
-/* Status badge */
-.status-badge-modern { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; }
-.status-badge-modern.running { background: rgba(103, 194, 58, 0.12); color: #67c23a; border: 1px solid rgba(103, 194, 58, 0.25); animation: pulse-glow 2s infinite; }
+  /* Shadows */
+  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
+  --shadow-md: 0 2px 12px rgba(0,0,0,0.06);
+  --shadow-lg: 0 8px 28px rgba(0,0,0,0.1);
+  --shadow-xl: 0 20px 60px rgba(0,0,0,0.3);
 
-/* el-table refinements */
-.el-table { border-radius: 12px; overflow: hidden; width: 100%; }
-.el-table .el-table__cell { word-break: break-word; }
+  /* Transitions */
+  --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
+  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
 
-/* Smooth page transitions */
-.page-enter-active { animation: fadeIn 0.4s ease-out; }
-
-/* ========== Reset & Base ========== */
-* { margin: 0; padding: 0; box-sizing: border-box; }
-body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background: #f5f7fa; color: #303133; min-height: 100vh; }
-
-/* ========== 统一布局 ========== */
-/* 固定顶部导航占位，所有页面自动继承 */
-.main-content { padding-top: 60px !important; display: flex; flex: 1; max-width: 1400px; margin: 0 auto; min-height: calc(100vh - 60px); }
-.content-area { flex: 1; padding: 24px; overflow-y: auto; }
-
-/* ========== 共享卡片 ========== */
-.card { background: white; border-radius: 16px; padding: 24px; margin-bottom: 24px; box-shadow: 0 2px 12px rgba(0,0,0,0.06); overflow-x: auto; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
-
-/* ========== 页面标题 ========== */
-.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
-.page-title { font-size: 24px; font-weight: 700; color: #303133; display: flex; align-items: center; gap: 8px; }
-
-/* ========== 筛选/工具栏 ========== */
-.filter-bar { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
-.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
-
-/* ========== H5响应式 ========== */
-@media (max-width: 768px) {
-  /* 对话框自适应宽度 */
-  .el-dialog { width: calc(100vw - 24px) !important; max-width: none !important; }
-  .el-dialog__body { padding: 16px !important; }
-
-  /* 表单网格在手机上改为单列 */
-  .el-row .el-col-12 { width: 100% !important; }
-
-    /* 手机端表格卡片 */
-  .mobile-card { position: relative; }
-  .mobile-card:active { transform: scale(0.98); }
-
-  /* 共享 content-area + card 响应式 */
-  .content-area { padding: 16px !important; padding-bottom: 80px; }
-  .card { padding: 16px !important; }
-
-  /* 页面标题在手机上紧凑 */
-  .page-header { flex-direction: column; align-items: flex-start !important; gap: 8px !important; }
+  /* Layout */
+  --nav-height: 60px;
+  --content-max-width: 1400px;
 }
 
-/* ========== 预览对话框（选题/文章共用） ========== */
-.preview-iframe { box-sizing: border-box; }
-.preview-dialog-custom.el-dialog { max-height: calc(100vh - 90px); overflow: hidden; display: flex; flex-direction: column; margin-top: 0 !important; }
-.preview-dialog-custom.el-dialog .el-dialog__header { padding: 8px 12px; margin: 0; flex-shrink: 0; }
-.preview-dialog-custom.el-dialog .el-dialog__body { padding: 12px; overflow: hidden; }
-.preview-dialog-custom.el-dialog .el-dialog__footer { flex-shrink: 0; padding: 8px 12px; }
-.preview-dialog-custom.is-fullscreen { z-index: 100001 !important; }
-body:has(.preview-dialog-custom.is-fullscreen) > [class*="el-overlay"] { z-index: 100000 !important; }
-@media (max-width: 768px) { .preview-iframe { max-height: calc(100vh - 250px) !important; } }
-@media (min-width: 769px) { .preview-iframe { max-height: calc(100vh - 100px) !important; } .preview-dialog-custom { position: relative; left: 90px; } }
+/* ========== Dark Mode ========== */
+@media (prefers-color-scheme: dark) {
+  :root {
+    --color-bg: #1a1a2e;
+    --color-bg-raised: #16213e;
+    --color-bg-subtle: #1a1a3e;
+    --color-border: #2a2a4e;
+    --color-border-hover: #4a4a6e;
 
-/* ========== 共享卡片无数据状态 ========== */
-.empty-state { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 60px 20px; color: #909399; }
-.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; opacity: 0.4; }
-.empty-state .empty-text { font-size: 14px; margin-bottom: 16px; }
-.loading-state { text-align: center; padding: 60px 20px; color: #909399; font-size: 16px; }
+    --color-text-primary: #e0e6ed;
+    --color-text-regular: #a0a6b0;
+    --color-text-secondary: #6b7280;
+    --color-text-placeholder: #4a4a5e;
 
-/* ========== 通用移动端卡片列表（替代表格） ========== */
+    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
+    --shadow-md: 0 2px 12px rgba(0,0,0,0.3);
+    --shadow-lg: 0 8px 28px rgba(0,0,0,0.4);
+  }
+  body { background: var(--color-bg); color: var(--color-text-primary); }
+  .card { background: var(--color-bg-raised); }
+  .el-table { --el-table-tr-bg: var(--color-bg-raised); --el-table-header-bg: var(--color-bg-subtle); }
+}
+
+/* ========== Reset & Base ========== */
+*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
+body {
+  font-family: var(--font-family);
+  font-size: var(--font-size-body);
+  background: var(--color-bg);
+  color: var(--color-text-primary);
+  min-height: 100vh;
+  line-height: 1.6;
+  -webkit-font-smoothing: antialiased;
+}
+
+/* ========== Page Transition ========== */
+.page-fade { animation: fadeIn 0.4s var(--ease-out); }
+@keyframes fadeIn {
+  from { opacity: 0; transform: translateY(12px); }
+  to { opacity: 1; transform: translateY(0); }
+}
+
+/* ========== Layout ========== */
+.main-content {
+  padding-top: var(--nav-height) !important;
+  display: flex;
+  flex: 1;
+  max-width: var(--content-max-width);
+  margin: 0 auto;
+  min-height: calc(100vh - var(--nav-height));
+}
+.content-area { flex: 1; padding: var(--spacing-lg); overflow-y: auto; }
+
+/* ========== Card ========== */
+.card {
+  background: var(--color-bg-raised);
+  border-radius: var(--radius-lg);
+  padding: var(--spacing-lg);
+  margin-bottom: var(--spacing-lg);
+  box-shadow: var(--shadow-md);
+  overflow-x: auto;
+  transition: all 0.3s var(--ease-out);
+}
+
+/* ========== Page Header ========== */
+.page-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: var(--spacing-lg);
+  flex-wrap: wrap;
+  gap: var(--spacing-sm);
+}
+.page-title {
+  font-size: var(--font-size-h2);
+  font-weight: 700;
+  color: var(--color-text-primary);
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-sm);
+}
+.card-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: var(--spacing-md);
+}
+.card-title { font-size: var(--font-size-h3); font-weight: 600; }
+
+/* ========== Toolbar & Filters ========== */
+.filter-bar, .toolbar {
+  display: flex;
+  gap: var(--spacing-sm);
+  flex-wrap: wrap;
+  align-items: center;
+}
+.filter-bar { margin-bottom: 20px; }
+.toolbar { margin-bottom: var(--spacing-md); }
+
+/* ========== Stats Grid ========== */
+.stats-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+  gap: var(--spacing-md);
+  margin-bottom: var(--spacing-lg);
+}
+.stat-card {
+  border-radius: var(--radius-md);
+  padding: 20px;
+  cursor: pointer;
+  transition: all 0.3s var(--ease-out);
+  background: var(--color-bg-subtle);
+  border: 1px solid var(--color-border);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  text-align: center;
+}
+.stat-card:hover {
+  transform: translateY(-4px);
+  box-shadow: var(--shadow-lg);
+  border-color: var(--color-border-hover);
+}
+.stat-card .stat-value {
+  font-size: var(--font-size-h1);
+  font-weight: 800;
+  line-height: 1.2;
+}
+.stat-card .stat-label {
+  font-size: var(--font-size-caption);
+  color: var(--color-text-secondary);
+  margin-top: var(--spacing-sm);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+.stat-card.stat-primary .stat-value { color: var(--color-primary); }
+.stat-card.stat-success .stat-value { color: var(--color-success); }
+.stat-card.stat-warning .stat-value { color: var(--color-warning); }
+.stat-card.stat-danger .stat-value { color: var(--color-danger); }
+.stat-card.stat-info .stat-value { color: var(--color-info); }
+
+/* ========== Stat Summary Bar ========== */
+.stat-summary { display: flex; gap: var(--spacing-md); flex-wrap: wrap; margin-bottom: var(--spacing-md); }
+.stat-summary .stat-item {
+  background: var(--color-bg-subtle); border-radius: var(--radius-sm);
+  padding: 12px 20px; display: flex; flex-direction: column;
+  align-items: center; min-width: 100px;
+}
+.stat-summary .stat-item .num { font-size: var(--font-size-h2); font-weight: 600; color: var(--color-primary); }
+.stat-summary .stat-item .label { font-size: var(--font-size-caption); color: var(--color-text-secondary); margin-top: var(--spacing-xs); }
+
+/* ========== Loading / Empty / Error States ========== */
+.loading-state, .card-loading {
+  display: flex; flex-direction: column; align-items: center; justify-content: center;
+  min-height: 200px; color: var(--color-text-secondary); font-size: var(--font-size-body);
+}
+.empty-state {
+  display: flex; flex-direction: column; align-items: center; justify-content: center;
+  padding: 60px 20px; color: var(--color-text-secondary);
+}
+.empty-state .empty-icon { font-size: 48px; margin-bottom: var(--spacing-sm); opacity: 0.4; }
+.empty-state .empty-text { font-size: var(--font-size-body); margin-bottom: var(--spacing-md); }
+
+/* ========== Mobile Card List (replaces table on small screens) ========== */
 .card-table { display: block; }
 .card-list-mobile { display: none; }
 @media (max-width: 768px) {
@@ -109,70 +236,185 @@ body:has(.preview-dialog-custom.is-fullscreen) > [class*="el-overlay"] { z-index
   .card-list-mobile { display: block; }
 }
 .card-list-mobile .card-item {
-  background: #fafbfc; border-radius: 10px; padding: 14px; margin-bottom: 10px;
-  border: 1px solid #ebeef5; transition: all 0.2s ease;
+  background: var(--color-bg); border-radius: 10px; padding: 14px; margin-bottom: 10px;
+  border: 1px solid var(--color-border); transition: all 0.2s ease;
 }
 .card-list-mobile .card-item:active { transform: scale(0.99); }
 .card-list-mobile .card-row {
   display: flex; justify-content: space-between; padding: 6px 0;
-  font-size: 13px; border-bottom: 1px dashed #f0f0f0;
+  font-size: var(--font-size-small); border-bottom: 1px dashed var(--color-border);
 }
 .card-list-mobile .card-row:last-child { border-bottom: none; }
-.card-list-mobile .card-label { color: #909399; flex-shrink: 0; margin-right: 8px; }
-.card-list-mobile .card-value { color: #303133; text-align: right; word-break: break-word; }
+.card-list-mobile .card-label { color: var(--color-text-secondary); flex-shrink: 0; margin-right: var(--spacing-sm); }
+.card-list-mobile .card-value { color: var(--color-text-primary); text-align: right; word-break: break-word; }
 .card-list-mobile .card-actions {
-  display: flex; gap: 8px; justify-content: flex-end;
-  padding-top: 10px; margin-top: 6px; border-top: 1px solid #ebeef5;
+  display: flex; gap: var(--spacing-sm); justify-content: flex-end;
+  padding-top: 10px; margin-top: 6px; border-top: 1px solid var(--color-border);
 }
 
-/* ========== 统计摘要条 ========== */
-.stat-summary { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
-.stat-summary .stat-item {
-  background: #f0f5ff; border-radius: 8px; padding: 12px 20px;
-  display: flex; flex-direction: column; align-items: center; min-width: 100px;
+/* ========== Status Badge & Dots ========== */
+.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: var(--spacing-xs); }
+.status-dot.pending, .status-dot.\34  pending { background: var(--color-warning); }
+.status-dot.review, .status-dot.\34  review { background: var(--color-danger); }
+.status-dot.ready, .status-dot.\34  ready { background: var(--color-success); }
+.status-dot.published, .status-dot.\34  published { background: var(--color-primary); }
+.status-dot.draft { background: var(--color-text-secondary); }
+
+/* ========== Search Bar ========== */
+.search-bar { display: flex; gap: var(--spacing-sm); flex-wrap: wrap; align-items: center; margin-bottom: var(--spacing-md); }
+
+/* ========== el-table refinements ========== */
+.el-table { border-radius: var(--radius-md); overflow: hidden; width: 100%; }
+.el-table .el-table__cell { word-break: break-word; }
+
+/* ========== Gradient Text ========== */
+.text-gradient { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+
+/* ========== Animations ========== */
+@keyframes pulse-glow { 0%, 100% { box-shadow: 0 0 0 0 rgba(103, 194, 58, 0.4); } 50% { box-shadow: 0 0 0 8px rgba(103, 194, 58, 0); } }
+.hover-lift { transition: all 0.4s var(--ease-bounce); }
+.hover-lift:hover { transform: translateY(-6px) scale(1.02); }
+.shimmer { position: relative; overflow: hidden; }
+.shimmer::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.06), transparent); transition: left 0.6s; }
+.shimmer:hover::before { left: 100%; }
+
+/* ========== Login Page ========== */
+.login-body {
+  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
+  min-height: 100vh; display: flex; align-items: center; justify-content: center;
+  overflow: hidden; position: relative;
 }
-.stat-summary .stat-item .num { font-size: 24px; font-weight: 600; color: #409eff; }
-.stat-summary .stat-item .label { font-size: 12px; color: #909399; margin-top: 4px; }
+.bg-circle {
+  position: absolute; border-radius: 50%;
+  background: rgba(255, 255, 255, 0.1);
+  animation: float 20s infinite var(--ease-out);
+}
+.bg-circle:nth-child(1) { width: 300px; height: 300px; top: -150px; left: -150px; animation-delay: 0s; }
+.bg-circle:nth-child(2) { width: 200px; height: 200px; bottom: -100px; right: -100px; animation-delay: -5s; }
+.bg-circle:nth-child(3) { width: 150px; height: 150px; top: 50%; right: 10%; animation-delay: -10s; }
+.bg-circle:nth-child(4) { width: 100px; height: 100px; bottom: 20%; left: 5%; animation-delay: -15s; }
+@keyframes float {
+  0%, 100% { transform: translate(0, 0) scale(1); }
+  25% { transform: translate(30px, -30px) scale(1.1); }
+  50% { transform: translate(-20px, 20px) scale(0.9); }
+  75% { transform: translate(20px, 30px) scale(1.05); }
+}
+@keyframes slide-up {
+  from { opacity: 0; transform: translateY(40px) scale(0.95); }
+  to { opacity: 1; transform: translateY(0) scale(1); }
+}
+.login-card {
+  position: relative; z-index: 10;
+  width: 100%; max-width: 420px;
+  padding: var(--spacing-2xl) 40px;
+  background: rgba(255, 255, 255, 0.95);
+  backdrop-filter: blur(20px);
+  border-radius: var(--radius-full);
+  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(255,255,255,0.2) inset;
+  animation: slide-up 0.6s var(--ease-bounce);
+}
+.login-title {
+  text-align: center; font-size: var(--font-size-h1); font-weight: 700;
+  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
+  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
+  margin-bottom: 40px; letter-spacing: -0.5px;
+}
+.login-subtitle { text-align: center; color: #9ca3af; font-size: var(--font-size-body); margin-top: -24px; margin-bottom: var(--spacing-xl); }
+.form-group { margin-bottom: var(--spacing-lg); position: relative; }
+.form-input {
+  width: 100%; padding: 14px 16px;
+  border: 2px solid #e5e7eb; border-radius: var(--radius-md);
+  font-size: var(--font-size-body); color: #1f2937;
+  background: #f9fafb; outline: none;
+  transition: all 0.3s var(--ease-out);
+}
+.form-input:focus { border-color: var(--color-primary); background: #ffffff; box-shadow: 0 0 0 4px rgba(102,126,234,0.1); transform: translateY(-2px); }
+.form-input:not(:placeholder-shown) { border-color: var(--color-accent); }
+.form-label {
+  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
+  color: #9ca3af; pointer-events: none; font-size: var(--font-size-body);
+  background: transparent; padding: 0 4px; transition: all 0.2s ease;
+}
+.form-input:focus ~ .form-label, .form-input:not(:placeholder-shown) ~ .form-label {
+  top: 0; font-size: var(--font-size-caption); color: var(--color-primary); background: #ffffff;
+}
+.login-btn {
+  width: 100%; padding: 14px; margin-top: var(--spacing-sm);
+  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
+  color: white; border: none; border-radius: var(--radius-md);
+  font-size: var(--font-size-body); font-weight: 600; cursor: pointer;
+  transition: all 0.3s var(--ease-out); position: relative; overflow: hidden;
+}
+.login-btn:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(102,126,234,0.4); }
+.login-btn:active:not(:disabled) { transform: translateY(0); }
+.login-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
+.btn-loader {
+  display: inline-block; width: 16px; height: 16px;
+  border: 2px solid rgba(255,255,255,0.3); border-top-color: white;
+  border-radius: 50%; animation: spin 0.8s linear infinite;
+  margin-right: var(--spacing-sm); vertical-align: middle;
+}
+@keyframes spin { to { transform: rotate(360deg); } }
+.login-footer { text-align: center; margin-top: var(--spacing-lg); color: #6b7280; font-size: var(--font-size-small); }
+.login-footer a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
+.login-footer a:hover { color: var(--color-accent); }
+
+/* ========== Preview Dialog ========== */
+.preview-iframe { box-sizing: border-box; }
+.preview-dialog-custom.el-dialog {
+  max-height: calc(100vh - 90px); overflow: hidden; display: flex;
+  flex-direction: column; margin-top: 0 !important;
+}
+.preview-dialog-custom.el-dialog .el-dialog__header { padding: var(--spacing-sm) var(--spacing-md); margin: 0; flex-shrink: 0; }
+.preview-dialog-custom.el-dialog .el-dialog__body { padding: var(--spacing-md); overflow: hidden; }
+.preview-dialog-custom.el-dialog .el-dialog__footer { flex-shrink: 0; padding: var(--spacing-sm) var(--spacing-md); }
+.preview-dialog-custom.is-fullscreen { z-index: 100001 !important; }
+body:has(.preview-dialog-custom.is-fullscreen) > [class*="el-overlay"] { z-index: 100000 !important; }
+
+/* ========== Responsive ========== */
 @media (max-width: 768px) {
-  .stat-summary { gap: 8px; }
-  .stat-summary .stat-item { min-width: 70px; padding: 8px 12px; }
+  .content-area { padding: var(--spacing-md) !important; padding-bottom: 80px; }
+  .card { padding: var(--spacing-md) !important; }
+  .page-header { flex-direction: column; align-items: flex-start !important; gap: var(--spacing-sm) !important; }
+
+  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-sm); }
+  .stat-card { padding: var(--spacing-md); }
+  .stat-card .stat-value { font-size: 24px; }
+
+  .stat-summary { gap: var(--spacing-sm); }
+  .stat-summary .stat-item { min-width: 70px; padding: var(--spacing-sm) var(--spacing-md); }
   .stat-summary .stat-item .num { font-size: 18px; }
-}
 
-/* ========== 加载中状态 ========== */
-.card-loading { display: flex; justify-content: center; align-items: center; min-height: 200px; color: #909399; font-size: 14px; }
-
-/* ========== 状态圆点 ========== */
-.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; }
-.status-dot.pending { background: #E6A23C; }
-.status-dot.review { background: #F56C6C; }
-.status-dot.ready { background: #67C23A; }
-.status-dot.published { background: #409EFF; }
-.status-dot.draft { background: #909399; }
-
-/* ========== 搜索栏 ========== */
-.search-bar { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
-@media (max-width: 768px) {
   .search-bar { flex-direction: column; align-items: stretch; }
   .search-bar .el-input, .search-bar .el-select { width: 100% !important; }
-}
 
-/* ========== 触摸优化 ========== */
-@media (max-width: 768px) {
+  .el-dialog { width: calc(100vw - 24px) !important; max-width: none !important; }
+  .el-dialog__body { padding: var(--spacing-md) !important; }
+  .el-row .el-col-12 { width: 100% !important; }
+
   .el-button { min-height: 36px; }
-  .el-button--small { min-height: 36px; padding: 8px 14px !important; }
+  .el-button--small { min-height: 36px; padding: var(--spacing-sm) 14px !important; }
   .el-button--default { padding: 10px 16px !important; }
   .el-input__inner { min-height: 38px; }
-  .el-table__cell .el-button { padding: 8px 12px !important; }
 
-  .btn-group-mobile { display: flex; gap: 6px; flex-wrap: wrap; }
-  .btn-group-mobile .el-button { flex: 1; min-width: 0; justify-content: center; }
-
-  .action-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
-  .action-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
-
-  .filter-bar-mobile { flex-direction: column; align-items: stretch !important; }
-  .filter-bar-mobile .el-select,
-  .filter-bar-mobile .el-input { width: 100% !important; }
-  .page-header-mobile { flex-direction: column; align-items: flex-start !important; gap: 8px !important; }
+  .preview-iframe { max-height: calc(100vh - 250px) !important; }
+  .preview-dialog-custom { position: relative; }
 }
+@media (min-width: 769px) {
+  .preview-iframe { max-height: calc(100vh - 100px) !important; }
+  .preview-dialog-custom { position: relative; left: 90px; }
+}
+
+@media (max-width: 480px) {
+  .login-card { max-width: 90%; padding: var(--spacing-xl) var(--spacing-lg); margin: var(--spacing-md); border-radius: var(--radius-xl); }
+  .login-title { font-size: var(--font-size-h2); margin-bottom: var(--spacing-lg); }
+}
+
+/* ========== Utility ========== */
+.btn-group-mobile { display: flex; gap: 6px; flex-wrap: wrap; }
+.btn-group-mobile .el-button { flex: 1; min-width: 0; justify-content: center; }
+.action-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
+.action-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
+.filter-bar-mobile { flex-direction: column; align-items: stretch !important; }
+.filter-bar-mobile .el-select, .filter-bar-mobile .el-input { width: 100% !important; }
+.page-header-mobile { flex-direction: column; align-items: flex-start !important; gap: var(--spacing-sm) !important; }
diff --git a/platform/frontend/topics.html b/platform/frontend/topics.html
index bacedaf..b8b5d23 100644
--- a/platform/frontend/topics.html
+++ b/platform/frontend/topics.html
@@ -7,35 +7,19 @@
     <link rel="stylesheet" href="element-plus.css">
     <link rel="stylesheet" href="theme-modern.css">
     <style>
-        .selected-count { color: #909399; font-size: 14px; margin-left: auto; }
-
-        .status-badge { display: inline-flex; align-items: center; gap: 4px; }
-        .status-dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; }
-        .status-dot.pending { background: #E6A23C; }
-        .status-dot.review { background: #F56C6C; }
-        .status-dot.ready { background: #67C23A; }
-        .status-dot.published { background: #409EFF; }
-
+        .selected-count { color: var(--color-text-secondary); font-size: var(--font-size-body); margin-left: auto; }
         .topic-card-list { display: none; }
-
         @media (max-width: 768px) {
-            .el-table { display: none; }
             .topic-card-list { display: block; }
-            .topic-card {
-                background: white;
-                border-radius: 12px;
-                padding: 12px;
-                margin-bottom: 12px;
-                box-shadow: 0 2px 8px rgba(0,0,0,0.08);
-            }
+            .topic-card { background: var(--color-bg-raised); border-radius: var(--radius-md); padding: 12px; margin-bottom: 12px; box-shadow: var(--shadow-sm); }
             .topic-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
-            .topic-card-title { font-size: 16px; font-weight: 600; color: #303133; flex: 1; margin-right: 8px; }
+            .topic-card-title { font-size: var(--font-size-body); font-weight: 600; color: var(--color-text-primary); flex: 1; margin-right: 8px; }
             .topic-card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
-            .topic-card-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: 12px; color: #606266; margin-bottom: 12px; }
-            .topic-card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid #ebeef5; }
+            .topic-card-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: var(--font-size-caption); color: var(--color-text-regular); margin-bottom: 12px; }
+            .topic-card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--color-border); }
             .topic-card-actions .el-button { margin: 0; width: 100%; justify-content: center; }
             .topic-card-actions .el-button:last-child:nth-child(odd) { grid-column: 1 / -1; }
-            .topic-card.is-checked { border: 2px solid #409eff; box-shadow: 0 0 0 1px rgba(64,158,255,0.2); }
+            .topic-card.is-checked { border: 2px solid var(--color-primary); box-shadow: 0 0 0 1px rgba(64,158,255,0.2); }
         }
     </style>
     <script src="uni-nav.js"></script>
diff --git a/platform/frontend/users.html b/platform/frontend/users.html
index 689c765..fed4d80 100644
--- a/platform/frontend/users.html
+++ b/platform/frontend/users.html
@@ -15,39 +15,14 @@
         @media (max-width: 768px) {
             .user-table { display: none; }
             .user-card-list { display: block; margin: 0 -16px; }
-            .user-card {
-                background: white;
-                border-radius: 10px;
-                padding: 16px;
-                margin-bottom: 12px;
-                box-shadow: 0 2px 8px rgba(0,0,0,0.08);
-                transition: all 0.2s ease;
-            }
+            .user-card { background: var(--color-bg-raised); border-radius: var(--radius-sm); padding: var(--spacing-md); margin-bottom: 12px; box-shadow: var(--shadow-sm); transition: all 0.2s ease; }
             .user-card:active { transform: scale(0.99); }
-            .user-card-header {
-                display: flex;
-                justify-content: space-between;
-                align-items: center;
-                margin-bottom: 12px;
-            }
-            .user-card-name { font-size: 16px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
-            .user-card-meta {
-                display: grid;
-                grid-template-columns: 1fr 1fr;
-                gap: 8px;
-                font-size: 13px;
-                color: #606266;
-                margin-bottom: 12px;
-            }
+            .user-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
+            .user-card-name { font-size: var(--font-size-h3); font-weight: 600; display: flex; align-items: center; gap: var(--spacing-sm); }
+            .user-card-meta { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-sm); font-size: var(--font-size-small); color: var(--color-text-regular); margin-bottom: 12px; }
             .user-card-meta-item { display: flex; flex-direction: column; gap: 2px; }
-            .user-card-meta-label { font-size: 11px; color: #909399; }
-            .user-card-actions {
-                display: flex;
-                gap: 8px;
-                justify-content: flex-end;
-                padding-top: 12px;
-                border-top: 1px solid #ebeef5;
-            }
+            .user-card-meta-label { font-size: var(--font-size-caption); color: var(--color-text-secondary); }
+            .user-card-actions { display: flex; gap: var(--spacing-sm); justify-content: flex-end; padding-top: 12px; border-top: 1px solid var(--color-border); }
         }
     </style>
     <script src="uni-nav.js"></script>