增加登陆功能，并修改正式环境用5002端口

public/static/css/style.css

@@ -867,6 +867,117 @@ color: #666;
     opacity: 0.5;
 }
 
+/* ========== 登录页面 ========== */
+.login-overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 9999;
+}
+
+.login-box {
+    background: white;
+    padding: 40px;
+    border-radius: 12px;
+    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
+    width: 400px;
+    max-width: 90%;
+}
+
+.login-box h2 {
+    text-align: center;
+    color: #333;
+    margin-bottom: 8px;
+    font-size: 24px;
+}
+
+.login-subtitle {
+    text-align: center;
+    color: #888;
+    margin-bottom: 30px;
+    font-size: 14px;
+}
+
+.login-box .form-group {
+    margin-bottom: 20px;
+}
+
+.login-box label {
+    display: block;
+    margin-bottom: 8px;
+    color: #555;
+    font-weight: 500;
+}
+
+.login-box input {
+    width: 100%;
+    padding: 12px 15px;
+    border: 1px solid #ddd;
+    border-radius: 6px;
+    font-size: 14px;
+    box-sizing: border-box;
+    transition: border-color 0.3s;
+}
+
+.login-box input:focus {
+    outline: none;
+    border-color: var(--primary);
+    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
+}
+
+.btn-block {
+    width: 100%;
+    padding: 12px;
+    font-size: 16px;
+    margin-top: 10px;
+}
+
+.login-tip {
+    text-align: center;
+    color: #aaa;
+    font-size: 12px;
+    margin-top: 20px;
+}
+
+/* 顶部栏 */
+.header-bar {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 20px;
+}
+
+.user-info {
+    display: flex;
+    align-items: center;
+    gap: 15px;
+    font-size: 14px;
+    color: #555;
+}
+
+.user-info span {
+    font-weight: 500;
+}
+
+.btn-link {
+    background: none;
+    border: none;
+    color: var(--primary);
+    cursor: pointer;
+    padding: 4px 8px;
+    font-size: 14px;
+}
+
+.btn-link:hover {
+    text-decoration: underline;
+}
+
 .page-btn.active {
     background: var(--primary);
     color: white;