function zib_login_security_notice() {
    if (is_user_logged_in() && !wp_is_mobile()) {
        $user = wp_get_current_user();
        $login_ip = !empty($_SERVER['HTTP_X_FORWARDED_FOR']) ? explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'])[0] : $_SERVER['REMOTE_ADDR'];
        $login_time = current_time('mysql');
        
        // 获取上次登录信息
        $last_ip = get_user_meta($user->ID, 'last_login_ip', true);
        $last_login = get_user_meta($user->ID, 'last_login', true);
        
        // 更新本次登录信息
        update_user_meta($user->ID, 'last_login', $login_time);
        update_user_meta($user->ID, 'last_login_ip', $login_ip);

        // 仅在检测到新 IP 时显示通知
        if ($last_ip && $last_ip != $login_ip) {
            $security_message = '检测到新登录地点，请确认是否本人操作！';
            
            ob_start(); ?>
            
            
                
                    
                
                
                    
                    账户安全提醒
                
                
                    
                        
                            
                        
                        
                            登录IP
                            
                        
                    
                    
                        
                            
                        
                        
                            登录时间
                            
                        
                    
                    
                        
                            
                        
                        
                            上次登录IP
                            
                        
                    
                
                
                    
                
            

            
            .zib-security-alert {
                position: fixed;
                bottom: 20px;
                right: 20px;
                background: rgba(255,255,255,0.98);
                border: 1px solid rgba(0,0,0,0.1);
                border-radius: 12px;
                padding: 16px;
                width: 320px;
                box-shadow: 0 8px 24px rgba(0,0,0,0.1);
                z-index: 999999;
                transform: translateY(20px);
                opacity: 0;
                animation: alertSlide 0.3s ease-out forwards;
                font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, sans-serif;
            }

            @media (max-width: 768px) {
                .zib-security-alert {
                    display: none !important;
                }
            }

            @media (prefers-color-scheme: dark) {
                .zib-security-alert {
                    background: rgba(30,30,30,0.98);
                    border-color: rgba(255,255,255,0.1);
                }
                .label { color: #858585; }
                .value { color: #e0e0e0; }
                .alert-footer.warning {
                    background: rgba(255, 213, 153, 0.15);
                    color: #ffb347;
                    border-color: rgba(255, 179, 71, 0.2);
                }
            }

            .alert-header {
                display: flex;
                align-items: center;
                margin-bottom: 16px;
            }
            .alert-header svg {
                color: #ff4d4f;
                margin-right: 12px;
            }
            .alert-header h3 {
                margin: 0;
                font-size: 16px;
                color: #1a1a1a;
            }

            .alert-item {
                display: flex;
                align-items: center;
                margin: 12px 0;
            }
            .item-icon {
                width: 36px;
                height: 36px;
                background: rgba(255,77,79,0.1);
                border-radius: 8px;
                display: flex;
                align-items: center;
                justify-content: center;
                margin-right: 12px;
            }
            .item-icon svg {
                color: #ff4d4f;
            }
            .item-info {
                flex: 1;
            }
            .label {
                display: block;
                font-size: 12px;
                color: #666;
                margin-bottom: 2px;
            }
            .value {
                display: block;
                font-size: 14px;
                font-weight: 500;
                color: #1a1a1a;
            }

            .alert-footer {
                margin-top: 16px;
                padding: 12px;
                border-radius: 8px;
                font-size: 13px;
                text-align: center;
            }
            .alert-footer.warning {
                background: #fff2f0;
                color: #ff4d4f;
                border: 1px solid #ffccc7;
            }

            .alert-close {
                position: absolute;
                top: 16px;
                right: 16px;
                cursor: pointer;
                opacity: 0.6;
                transition: all 0.2s;
            }
            .alert-close:hover {
                opacity: 1;
                transform: rotate(90deg);
            }

            @keyframes alertSlide {
                to {
                    transform: translateY(0);
                    opacity: 1;
                }
            }
            

            
            function handleCloseSecurity() {
                document.getElementById('zibSecurityAlert').style.display = 'none';
                var date = new Date();
                date.setDate(date.getDate() + 1);
                document.cookie = "zib_security_closed=1; expires=" + date.toUTCString() + "; path=/";
            }
            
            document.addEventListener('DOMContentLoaded', function() {
                if (/Mobi|Android/i.test(navigator.userAgent)) return;
                if (document.cookie.includes('zib_security_closed')) {
                    document.getElementById('zibSecurityAlert').style.display = 'none';
                }
            });
            
            
            <?php
            echo ob_get_clean();
        }
    }
}
add_action('wp_footer', 'zib_login_security_notice');