添加站点统计（小工具版）

新建插件文件夹和css文件夹，代码一直有问题，都迭代4.0了，🤣🤣，代码如下：

<?php
/**
 * Plugin Name: 网站数据统计小工具
 * Description: 显示网站运行时间、文章、评论、友链等统计信息
 * Version: 4.0
 * Author: QingZhao
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

class Site_Statistics_Widget extends WP_Widget {
    
    private $page_views_option = 'site_statistics_page_views';
    private $plugin_version = '4.0';
    
    // 构造函数
    public function __construct() {
        parent::__construct(
            'site_statistics_widget',
            '网站数据统计',
            array('description' => '显示网站运行时间、文章、评论、友链等统计信息')
        );
        
        // 注册样式表
        add_action('wp_enqueue_scripts', array($this, 'enqueue_styles'));
        
        // 初始化访问量统计
        add_action('init', array($this, 'init_page_views'));
        
        // 初始化会话
        add_action('init', array($this, 'init_session'));
        
        // 添加内联样式
        add_action('wp_head', array($this, 'add_inline_styles'));
    }
    
    // 注册前端样式
    public function enqueue_styles() {
        if (is_active_widget(false, false, $this->id_base, true)) {
            // 使用文件修改时间作为版本号，确保缓存更新
            $css_file = plugin_dir_path(__FILE__) . 'css/style.css';
            $css_version = file_exists($css_file) ? filemtime($css_file) : $this->plugin_version;
            
            // 添加缓存清除版本
            $cache_version = get_option('site_statistics_css_version', 0);
            if ($cache_version) {
                $css_version = $cache_version;
            }
            
            wp_enqueue_style(
                'site-statistics-style', 
                plugins_url('css/style.css', __FILE__),
                array(),
                $css_version
            );
        }
    }
    
    // 添加内联样式确保覆盖
    public function add_inline_styles() {
        if (is_active_widget(false, false, $this->id_base, true)) {
            echo '<style>
            .site-statistics { 
                background: #ffffff !important; 
                border: 1px solid #eaeaea !important; 
                border-radius: 8px !important; 
                padding: 20px !important;
                box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05) !important;
                font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
                font-size: 13px !important;
                line-height: 1.5 !important;
                color: #333 !important;
            }
            .site-statistics .stat-item { 
                background: transparent !important; 
                background-image: none !important; 
            }
            .site-statistics .stat-main, 
            .site-statistics .stat-details, 
            .site-statistics .stat-info { 
                border-bottom: 1px dashed #e0e0e0 !important; 
            }
            .site-statistics .stat-row, 
            .site-statistics .info-row { 
                border-bottom: 1px dashed #f0f0f0 !important; 
            }
            .site-statistics .footer-time { 
                background: #f9f9f9 !important; 
                border: 1px solid #eaeaea !important; 
            }
            .site-statistics * { 
                background-image: none !important; 
            }
            </style>';
        }
    }
    
    // 初始化会话
    public function init_session() {
        if (!session_id() && !headers_sent()) {
            session_start();
        }
    }
    
    // 初始化访问量
    public function init_page_views() {
        $page_views = get_option($this->page_views_option);
        if ($page_views === false) {
            update_option($this->page_views_option, 0);
        }
    }
    
    // 前端显示
    public function widget($args, $instance) {
        echo $args['before_widget'];
        
        if (!empty($instance['title'])) {
            echo $args['before_title'] . apply_filters('widget_title', $instance['title']) . $args['after_title'];
        }
        
        $this->display_statistics($instance);
        
        echo $args['after_widget'];
    }
    
    // 后台表单
    public function form($instance) {
        // 设置默认值
        $defaults = array(
            'title' => '网站数据统计',
            'start_date' => date('Y-m-d'),
            'guestbook_page_id' => '',
            'admin_user_id' => '',
            'initial_views' => '0',
            'timezone_offset' => '0'
        );
        
        // 显示选项默认值
        $display_defaults = array(
            'show_runtime' => 1,
            'show_articles' => 1,
            'show_wordcount' => 1,
            'show_comments' => 1,
            'show_links' => 1,
            'show_guestbook' => 1,
            'show_rundays' => 1,
            'show_pageviews' => 1,
            'show_login_time' => 1
        );
        
        // 合并所有默认值
        $all_defaults = array_merge($defaults, $display_defaults);
        
        // 确保所有字段都有值
        $instance = wp_parse_args((array) $instance, $all_defaults);
        
        // 获取所有用户
        $users = get_users(array(
            'orderby' => 'display_name',
            'order' => 'ASC'
        ));
        
        // 获取所有页面
        $pages = get_pages();
        
        // 获取当前访问量
        $current_views = get_option($this->page_views_option, 0);
        
        // 显示当前服务器时间
        $current_server_time = date('Y-m-d H:i:s');
        $server_timezone = date_default_timezone_get();
        
        // 获取CSS文件信息
        $css_file = plugin_dir_path(__FILE__) . 'css/style.css';
        $css_mtime = file_exists($css_file) ? date('Y-m-d H:i:s', filemtime($css_file)) : '文件不存在';
        ?>
        
        <div class="site-statistics-admin">
            <!-- 基础设置 -->
            <div class="admin-section">
                <h4>基本设置</h4>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('title')); ?>">标题：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('title')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('title')); ?>" 
                           type="text" value="<?php echo esc_attr($instance['title']); ?>">
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('start_date')); ?>">网站起始日期：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('start_date')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('start_date')); ?>" 
                           type="date" value="<?php echo esc_attr($instance['start_date']); ?>">
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('admin_user_id')); ?>">站长账号：</label>
                    <select class="widefat" id="<?php echo esc_attr($this->get_field_id('admin_user_id')); ?>" 
                            name="<?php echo esc_attr($this->get_field_name('admin_user_id')); ?>">
                        <option value="">-- 选择站长账号 --</option>
                        <?php foreach ($users as $user): ?>
                            <option value="<?php echo $user->ID; ?>" <?php selected($instance['admin_user_id'], $user->ID); ?>>
                                <?php echo esc_html($user->display_name); ?> (<?php echo esc_html($user->user_login); ?>)
                            </option>
                        <?php endforeach; ?>
                    </select>
                </p>
            </div>
            
            <!-- 时间设置 -->
            <div class="admin-section">
                <h4>时间设置</h4>
                
                <div style="background: #f5f5f5; padding: 10px; border-radius: 4px; margin-bottom: 10px;">
                    <p style="margin: 0; font-size: 12px;">
                        <strong>时间信息：</strong><br>
                        服务器时间：<?php echo $current_server_time; ?><br>
                        时区：<?php echo $server_timezone; ?> (UTC<?php echo date('P'); ?>)
                    </p>
                </div>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('timezone_offset')); ?>">时区校正（小时）：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('timezone_offset')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('timezone_offset')); ?>" 
                           type="number" value="<?php echo esc_attr($instance['timezone_offset']); ?>" 
                           step="0.5" min="-12" max="14">
                    <small>格式：数字，如 8, -5, 10.5, -8.5</small>
                </p>
                
                <div style="background: #e8f5e8; padding: 8px; border-radius: 4px; margin-top: 8px;">
                    <small>
                        <strong>校正说明：</strong><br>
                        如果显示时间比实际早，请设置为正数（如：10.5）<br>
                        如果显示时间比实际晚，请设置为负数（如：-10.5）
                    </small>
                </div>
            </div>
            
            <!-- 显示控制 -->
            <div class="admin-section">
                <h4>显示控制</h4>
                
                <div class="display-controls">
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_runtime')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_runtime')); ?>" 
                               value="1" <?php checked($instance['show_runtime'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_runtime')); ?>">
                            显示运行时间
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_articles')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_articles')); ?>" 
                               value="1" <?php checked($instance['show_articles'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_articles')); ?>">
                            显示文章数量
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_wordcount')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_wordcount')); ?>" 
                               value="1" <?php checked($instance['show_wordcount'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_wordcount')); ?>">
                            显示字数统计
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_comments')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_comments')); ?>" 
                               value="1" <?php checked($instance['show_comments'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_comments')); ?>">
                            显示文章评论
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_links')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_links')); ?>" 
                               value="1" <?php checked($instance['show_links'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_links')); ?>">
                            显示邻居友链
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_guestbook')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_guestbook')); ?>" 
                               value="1" <?php checked($instance['show_guestbook'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_guestbook')); ?>">
                            显示好友留言
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_rundays')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_rundays')); ?>" 
                               value="1" <?php checked($instance['show_rundays'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_rundays')); ?>">
                            显示详细运行时间
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_pageviews')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_pageviews')); ?>" 
                               value="1" <?php checked($instance['show_pageviews'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_pageviews')); ?>">
                            显示页面访问量
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_login_time')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_login_time')); ?>" 
                               value="1" <?php checked($instance['show_login_time'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_login_time')); ?>">
                            显示最后登录时间
                        </label>
                    </p>
                </div>
            </div>
            
            <!-- 数据设置 -->
            <div class="admin-section">
                <h4>数据设置</h4>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('guestbook_page_id')); ?>">留言板页面：</label>
                    <select class="widefat" id="<?php echo esc_attr($this->get_field_id('guestbook_page_id')); ?>" 
                            name="<?php echo esc_attr($this->get_field_name('guestbook_page_id')); ?>">
                        <option value="">-- 无留言板 --</option>
                        <?php foreach ($pages as $page): ?>
                            <option value="<?php echo $page->ID; ?>" <?php selected($instance['guestbook_page_id'], $page->ID); ?>>
                                <?php echo esc_html($page->post_title); ?>
                            </option>
                        <?php endforeach; ?>
                    </select>
                </p>
                
                <p>
                    <label>当前访问量：</label>
                    <span style="font-weight: bold; color: #333;"><?php echo number_format($current_views); ?> 次</span>
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('initial_views')); ?>">设置访问量：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('initial_views')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('initial_views')); ?>" 
                           type="number" value="<?php echo esc_attr($instance['initial_views']); ?>" min="0" step="1">
                    <small>设置后点击"保存"生效</small>
                </p>
            </div>
            
            <!-- CSS信息 -->
            <div class="admin-section">
                <h4>样式信息</h4>
                <div style="background: #f0f8ff; padding: 10px; border-radius: 4px; margin-bottom: 10px;">
                    <p style="margin: 0; font-size: 12px;">
                        <strong>CSS文件信息：</strong><br>
                        CSS最后修改：<?php echo $css_mtime; ?><br>
                        如果样式未更新：<br>
                        1. 按Ctrl+F5强制刷新<br>
                        2. <a href="<?php echo admin_url('options-general.php?page=site-statistics&action=clear_cache'); ?>" style="color: #0073aa;">点击清除CSS缓存</a>
                    </p>
                </div>
            </div>
        </div>
        
        <style>
        .site-statistics-admin {
            border: 1px solid #e0e0e0;
            border-radius: 4px;
            padding: 15px;
            background: #fafafa;
        }
        .admin-section {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid #e0e0e0;
        }
        .admin-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }
        .admin-section h4 {
            margin: 0 0 12px 0;
            color: #333;
            font-size: 14px;
        }
        .display-controls p {
            margin-bottom: 8px;
        }
        </style>
        <?php
    }
    
    // 更新设置
    public function update($new_instance, $old_instance) {
        $instance = array();
        
        // 基础设置
        $instance['title'] = !empty($new_instance['title']) ? sanitize_text_field($new_instance['title']) : '';
        $instance['start_date'] = !empty($new_instance['start_date']) ? sanitize_text_field($new_instance['start_date']) : date('Y-m-d');
        $instance['guestbook_page_id'] = isset($new_instance['guestbook_page_id']) ? intval($new_instance['guestbook_page_id']) : '';
        $instance['admin_user_id'] = isset($new_instance['admin_user_id']) ? intval($new_instance['admin_user_id']) : '';
        $instance['initial_views'] = isset($new_instance['initial_views']) ? intval($new_instance['initial_views']) : 0;
        $instance['timezone_offset'] = isset($new_instance['timezone_offset']) ? floatval($new_instance['timezone_offset']) : 0;
        
        // 显示选项
        $instance['show_runtime'] = isset($new_instance['show_runtime']) ? 1 : 0;
        $instance['show_articles'] = isset($new_instance['show_articles']) ? 1 : 0;
        $instance['show_wordcount'] = isset($new_instance['show_wordcount']) ? 1 : 0;
        $instance['show_comments'] = isset($new_instance['show_comments']) ? 1 : 0;
        $instance['show_links'] = isset($new_instance['show_links']) ? 1 : 0;
        $instance['show_guestbook'] = isset($new_instance['show_guestbook']) ? 1 : 0;
        $instance['show_rundays'] = isset($new_instance['show_rundays']) ? 1 : 0;
        $instance['show_pageviews'] = isset($new_instance['show_pageviews']) ? 1 : 0;
        $instance['show_login_time'] = isset($new_instance['show_login_time']) ? 1 : 0;
        
        // 更新访问量
        if ($instance['initial_views'] > 0) {
            $current_views = get_option($this->page_views_option, 0);
            if ($instance['initial_views'] > $current_views) {
                update_option($this->page_views_option, $instance['initial_views']);
            }
        }
        
        return $instance;
    }
    
    // 显示统计数据
    private function display_statistics($instance) {
        // 确保显示选项存在且正确
        $instance = wp_parse_args((array) $instance, array(
            'show_runtime' => 1,
            'show_articles' => 1,
            'show_wordcount' => 1,
            'show_comments' => 1,
            'show_links' => 1,
            'show_guestbook' => 1,
            'show_rundays' => 1,
            'show_pageviews' => 1,
            'show_login_time' => 1
        ));
        
        // 获取数据
        $data = $this->get_statistics_data($instance);
        
        // 如果没有设置站长，强制不显示登录时间
        if (empty($instance['admin_user_id'])) {
            $instance['show_login_time'] = 0;
        }
        
        ?>
        <div class="site-statistics">
            <!-- 主要统计 -->
            <?php if ($instance['show_runtime'] || $instance['show_articles']): ?>
            <div class="stat-main">
                <?php if ($instance['show_runtime']): ?>
                <div class="stat-item">
                    <div class="stat-label">运行时间</div>
                    <div class="stat-value"><?php echo $data['runtime']['years']; ?> 年</div>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_articles']): ?>
                <div class="stat-item">
                    <div class="stat-label">文章数量</div>
                    <div class="stat-value"><?php echo $data['post_count']; ?> 篇</div>
                    <?php if ($instance['show_wordcount']): ?>
                    <div class="stat-sub"><?php echo number_format($data['wordcount'] / 10000, 1); ?> 万字</div>
                    <?php endif; ?>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 详细统计 -->
            <?php if (($instance['show_comments'] && $data['article_comments'] > 0) || 
                      ($instance['show_links'] && $data['bookmarks_count'] > 0) || 
                      ($instance['show_guestbook'] && $data['guestbook_comments'] > 0)): ?>
            <div class="stat-details">
                <?php if ($instance['show_comments'] && $data['article_comments'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">文章评论</span>
                    <span class="detail-value"><?php echo $data['article_comments']; ?> 条</span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_links'] && $data['bookmarks_count'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">邻居友链</span>
                    <span class="detail-value"><?php echo $data['bookmarks_count']; ?> 个</span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_guestbook'] && $data['guestbook_comments'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">好友留言</span>
                    <span class="detail-value"><?php echo $data['guestbook_comments']; ?> 条</span>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 运行信息 -->
            <?php if ($instance['show_rundays'] || $instance['show_pageviews']): ?>
            <div class="stat-info">
                <?php if ($instance['show_rundays']): ?>
                <div class="info-row">
                    <span class="info-label">网站运行</span>
                    <span class="info-value">
                        <?php echo $data['runtime']['years']; ?>年
                        <?php echo $data['runtime']['months']; ?>月
                        <?php echo $data['runtime']['days']; ?>天
                    </span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_pageviews']): ?>
                <div class="info-row">
                    <span class="info-label">页面访问</span>
                    <span class="info-value"><?php echo number_format($data['page_views']); ?> 次</span>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 站长信息 -->
            <?php if ($instance['show_login_time'] && !empty($data['last_login'])): ?>
            <div class="stat-footer">
                <div class="footer-label">站长最后登录</div>
                <div class="footer-time"><?php echo $data['last_login']; ?></div>
            </div>
            <?php endif; ?>
        </div>
        <?php
    }
    
    // 获取统计数据
    private function get_statistics_data($instance) {
        $data = array();
        
        // 文章数据
        $data['post_count'] = wp_count_posts()->publish;
        $data['wordcount'] = $this->calculate_wordcount();
        
        // 评论数据
        $data['article_comments'] = $this->get_article_comments_count();
        $data['guestbook_comments'] = $this->get_guestbook_comments_count($instance);
        
        // 友链数据
        $data['bookmarks_count'] = $this->get_bookmarks_count();
        
        // 运行时间
        $data['runtime'] = $this->calculate_runtime($instance['start_date']);
        
        // 页面访问量
        $data['page_views'] = $this->get_page_views();
        
        // 最后登录时间
        if (!empty($instance['admin_user_id'])) {
            $data['last_login'] = $this->get_admin_last_login($instance);
        } else {
            $data['last_login'] = '';
        }
        
        return $data;
    }
    
    // 计算字数
    private function calculate_wordcount() {
        static $wordcount = null;
        
        if ($wordcount === null) {
            global $wpdb;
            
            $result = $wpdb->get_var(
                "SELECT SUM(
                    LENGTH(post_content) - LENGTH(REPLACE(post_content, ' ', '')) + 1
                ) as wordcount 
                FROM {$wpdb->posts} 
                WHERE post_type = 'post' 
                AND post_status = 'publish'"
            );
            
            $wordcount = $result ? intval($result) : 0;
        }
        
        return $wordcount;
    }
    
    // 获取文章评论数量
    private function get_article_comments_count() {
        global $wpdb;
        
        $count = $wpdb->get_var(
            "SELECT COUNT(*) 
            FROM {$wpdb->comments} c
            INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
            WHERE c.comment_approved = '1'
            AND p.post_type = 'post'
            AND p.post_status = 'publish'"
        );
        
        return $count ? intval($count) : 0;
    }
    
    // 获取留言板评论数量
    private function get_guestbook_comments_count($instance) {
        if (empty($instance['guestbook_page_id'])) {
            return 0;
        }
        
        global $wpdb;
        
        $count = $wpdb->get_var($wpdb->prepare(
            "SELECT COUNT(*) 
            FROM {$wpdb->comments} 
            WHERE comment_approved = '1' 
            AND comment_post_ID = %d",
            $instance['guestbook_page_id']
        ));
        
        return $count ? intval($count) : 0;
    }
    
    // 获取友情链接数量
    private function get_bookmarks_count() {
        $bookmarks = get_bookmarks(array('hide_invisible' => 1));
        return count($bookmarks);
    }
    
    // 计算运行时间
    private function calculate_runtime($start_date) {
        try {
            $start = new DateTime($start_date);
            $now = new DateTime();
            $interval = $start->diff($now);
            
            return array(
                'years' => $interval->y,
                'months' => $interval->m,
                'days' => $interval->d
            );
        } catch (Exception $e) {
            return array('years' => 0, 'months' => 0, 'days' => 0);
        }
    }
    
    // 获取页面访问量
    private function get_page_views() {
        return get_option($this->page_views_option, 0);
    }
    
    // 获取站长最后登录时间
    private function get_admin_last_login($instance) {
        $admin_id = $instance['admin_user_id'];
        
        if (empty($admin_id)) {
            return '';
        }
        
        // 获取时区偏移量
        $timezone_offset = isset($instance['timezone_offset']) ? floatval($instance['timezone_offset']) : 0;
        
        // 方法1：从专用字段获取
        $last_login = get_user_meta($admin_id, 'site_stats_last_login_corrected', true);
        
        // 方法2：如果没有专用字段，从普通字段获取并校正
        if (empty($last_login)) {
            $last_login_raw = get_user_meta($admin_id, 'last_login', true);
            
            if (!empty($last_login_raw)) {
                // 应用时区校正
                $last_login = $this->apply_timezone_correction($last_login_raw, $timezone_offset);
                update_user_meta($admin_id, 'site_stats_last_login_corrected', $last_login);
            }
        }
        
        // 方法3：从会话获取
        if (empty($last_login)) {
            $session_tokens = get_user_meta($admin_id, 'session_tokens', true);
            if (!empty($session_tokens) && is_array($session_tokens)) {
                $last_login_time = 0;
                foreach ($session_tokens as $session) {
                    if (isset($session['login']) && $session['login'] > $last_login_time) {
                        $last_login_time = $session['login'];
                    }
                }
                if ($last_login_time > 0) {
                    $last_login = $this->apply_timezone_correction(
                        date('Y-m-d H:i:s', $last_login_time), 
                        $timezone_offset
                    );
                    update_user_meta($admin_id, 'site_stats_last_login_corrected', $last_login);
                }
            }
        }
        
        return !empty($last_login) ? $last_login : '暂无记录';
    }
    
    // 应用时区校正
    private function apply_timezone_correction($time_string, $offset_hours) {
        try {
            // 解析时间
            $datetime = new DateTime($time_string);
            
            // 应用时区偏移
            if ($offset_hours != 0) {
                $interval = DateInterval::createFromDateString(abs($offset_hours) . ' hours');
                if ($offset_hours > 0) {
                    $datetime->add($interval);
                } else {
                    $datetime->sub($interval);
                }
            }
            
            // 返回格式化的时间
            return $datetime->format('Y-m-d H:i:s');
            
        } catch (Exception $e) {
            return $time_string;
        }
    }
}

// 注册小工具
function register_site_statistics_widget() {
    register_widget('Site_Statistics_Widget');
}
add_action('widgets_init', 'register_site_statistics_widget');

// 记录页面访问量
function site_statistics_count_page_view() {
    // 不记录后台访问
    if (is_admin()) {
        return;
    }
    
    // 不记录爬虫
    if (isset($_SERVER['HTTP_USER_AGENT'])) {
        $user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
        $bots = array('bot', 'spider', 'crawl', 'scrape', 'slurp', 'curl', 'wget', 'python', 'java');
        
        foreach ($bots as $bot) {
            if (strpos($user_agent, $bot) !== false) {
                return;
            }
        }
    }
    
    // 使用会话防止重复计数（24小时）
    if (!isset($_SESSION['site_stats_last_count'])) {
        $_SESSION['site_stats_last_count'] = time();
    } else {
        if (time() - $_SESSION['site_stats_last_count'] < 86400) {
            return;
        }
    }
    
    // 增加访问量
    $current_views = get_option('site_statistics_page_views', 0);
    update_option('site_statistics_page_views', $current_views + 1);
    
    // 更新最后计数时间
    $_SESSION['site_stats_last_count'] = time();
}
add_action('wp', 'site_statistics_count_page_view');

// 记录用户最后登录时间
function site_statistics_record_last_login($user_login, $user) {
    if ($user && $user->ID) {
        // 存储当前时间
        $current_time = current_time('mysql');
        
        // 存储到专用字段
        update_user_meta($user->ID, 'last_login', $current_time);
        
        // 清除校正后的缓存
        delete_user_meta($user->ID, 'site_stats_last_login_corrected');
    }
}
add_action('wp_login', 'site_statistics_record_last_login', 10, 2);

// 添加快捷码支持
function site_statistics_shortcode($atts) {
    $atts = shortcode_atts(array(
        'title' => ''
    ), $atts);
    
    ob_start();
    
    echo '<div class="site-statistics-shortcode">';
    if (!empty($atts['title'])) {
        echo '<h3>' . esc_html($atts['title']) . '</h3>';
    }
    
    // 创建默认实例
    $instance = array(
        'title' => '',
        'start_date' => '2002-04-20',
        'guestbook_page_id' => '',
        'admin_user_id' => 1,
        'initial_views' => 0,
        'timezone_offset' => 0,
        'show_runtime' => 1,
        'show_articles' => 1,
        'show_wordcount' => 1,
        'show_comments' => 1,
        'show_links' => 1,
        'show_guestbook' => 1,
        'show_rundays' => 1,
        'show_pageviews' => 1,
        'show_login_time' => 1
    );
    
    $widget = new Site_Statistics_Widget();
    $widget->display_statistics($instance);
    echo '</div>';
    
    return ob_get_clean();
}
add_shortcode('site_statistics', 'site_statistics_shortcode');

// 添加管理菜单
function site_statistics_add_admin_menu() {
    add_options_page(
        '网站统计设置',
        '网站统计',
        'manage_options',
        'site-statistics',
        'site_statistics_admin_page'
    );
}
add_action('admin_menu', 'site_statistics_add_admin_menu');

// 管理页面
function site_statistics_admin_page() {
    if (!current_user_can('manage_options')) {
        return;
    }
    
    // 处理表单提交
    if (isset($_POST['action'])) {
        if ($_POST['action'] === 'reset_views' && check_admin_referer('site_stats_reset')) {
            update_option('site_statistics_page_views', 0);
            echo '<div class="notice notice-success"><p>访问量已重置为0</p></div>';
        } elseif ($_POST['action'] === 'set_views' && check_admin_referer('site_stats_set')) {
            $views = intval($_POST['page_views']);
            update_option('site_statistics_page_views', $views);
            echo '<div class="notice notice-success"><p>访问量已设置为 ' . number_format($views) . '</p></div>';
        } elseif ($_POST['action'] === 'clear_login_cache' && check_admin_referer('site_stats_clear_cache')) {
            // 清除所有用户的登录时间缓存
            global $wpdb;
            $wpdb->query("DELETE FROM {$wpdb->usermeta} WHERE meta_key = 'site_stats_last_login_corrected'");
            echo '<div class="notice notice-success"><p>已清除登录时间缓存</p></div>';
        } elseif ($_POST['action'] === 'clear_css_cache' && check_admin_referer('site_stats_clear_css_cache')) {
            // 清除CSS缓存
            update_option('site_statistics_css_version', time());
            echo '<div class="notice notice-success"><p>CSS缓存已清除，请刷新页面查看新样式</p></div>';
        }
    }
    
    // 获取统计数据
    $page_views = get_option('site_statistics_page_views', 0);
    $post_count = wp_count_posts()->publish;
    
    global $wpdb;
    $comment_count = $wpdb->get_var(
        "SELECT COUNT(*) 
        FROM {$wpdb->comments} c
        INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
        WHERE c.comment_approved = '1'
        AND p.post_type = 'post'
        AND p.post_status = 'publish'"
    );
    
    $bookmarks_count = count(get_bookmarks(array('hide_invisible' => 1)));
    
    ?>
    <div class="wrap">
        <h1>网站统计设置</h1>
        
        <div class="site-stats-admin-page">
            <div class="stats-overview">
                <h2>统计数据概览</h2>
                <table class="widefat">
                    <tr>
                        <td><strong>页面访问量</strong></td>
                        <td><?php echo number_format($page_views); ?> 次</td>
                    </tr>
                    <tr>
                        <td><strong>文章总数</strong></td>
                        <td><?php echo $post_count; ?> 篇</td>
                    </tr>
                    <tr>
                        <td><strong>文章评论</strong></td>
                        <td><?php echo $comment_count; ?> 条</td>
                    </tr>
                    <tr>
                        <td><strong>友情链接</strong></td>
                        <td><?php echo $bookmarks_count; ?> 个</td>
                    </tr>
                </table>
            </div>
            
            <div class="stats-controls">
                <h2>访问量控制</h2>
                <form method="post" style="margin-bottom: 20px;">
                    <?php wp_nonce_field('site_stats_set'); ?>
                    <input type="hidden" name="action" value="set_views">
                    <p>
                        <label for="page_views">设置访问量：</label>
                        <input type="number" name="page_views" value="<?php echo $page_views; ?>" class="regular-text">
                        <input type="submit" value="设置" class="button button-primary">
                    </p>
                </form>
                
                <form method="post">
                    <?php wp_nonce_field('site_stats_reset'); ?>
                    <input type="hidden" name="action" value="reset_views">
                    <p>
                        <input type="submit" value="重置访问量为0" class="button button-secondary" 
                               onclick="return confirm('确定要重置访问量吗？这将无法恢复！');">
                    </p>
                </form>
                
                <h2>缓存管理</h2>
                <form method="post" style="margin-bottom: 15px;">
                    <?php wp_nonce_field('site_stats_clear_cache'); ?>
                    <input type="hidden" name="action" value="clear_login_cache">
                    <p>
                        <input type="submit" value="清除登录时间缓存" class="button">
                        <small>如果登录时间显示不正确，请清除缓存后重新登录</small>
                    </p>
                </form>
                
                <form method="post">
                    <?php wp_nonce_field('site_stats_clear_css_cache'); ?>
                    <input type="hidden" name="action" value="clear_css_cache">
                    <p>
                        <input type="submit" value="清除CSS样式缓存" class="button">
                        <small>如果样式没有更新，请清除CSS缓存</small>
                    </p>
                </form>
            </div>
        </div>
        
        <div class="stats-info">
            <h3>使用说明</h3>
            <ul>
                <li><strong>时区校正：</strong>如果显示的时间比实际时间早，请设置为正数（如：10.5）</li>
                <li><strong>显示控制：</strong>取消勾选的项目将不会在前台显示</li>
                <li><strong>文章评论：</strong>只统计文章（post类型）的评论，不包括页面和其他类型</li>
                <li><strong>好友留言：</strong>需要选择留言板页面才能统计</li>
                <li><strong>站长登录：</strong>需要选择站长账号才能显示</li>
                <li><strong>访问量：</strong>自动过滤爬虫，同一会话24小时内只计数一次</li>
                <li><strong>样式问题：</strong>如果样式未更新，请清除CSS缓存或按Ctrl+F5强制刷新</li>
            </ul>
        </div>
    </div>
    
    <style>
    .site-stats-admin-page {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin: 20px 0;
    }
    .stats-overview table {
        width: 100%;
        border-collapse: collapse;
    }
    .stats-overview td {
        padding: 10px;
        border-bottom: 1px solid #eee;
    }
    .stats-controls form {
        background: #f9f9f9;
        padding: 15px;
        border-radius: 4px;
        margin-bottom: 15px;
    }
    .stats-info ul {
        list-style: disc;
        margin-left: 20px;
    }
    .stats-info li {
        margin-bottom: 5px;
    }
    @media (max-width: 768px) {
        .site-stats-admin-page {
            grid-template-columns: 1fr;
        }
    }
    </style>
    <?php
}

// 添加仪表板小工具
function site_statistics_dashboard_widget() {
    wp_add_dashboard_widget(
        'site_statistics_dashboard',
        '网站统计概览',
        'site_statistics_dashboard_content'
    );
}
add_action('wp_dashboard_setup', 'site_statistics_dashboard_widget');

function site_statistics_dashboard_content() {
    $page_views = get_option('site_statistics_page_views', 0);
    $post_count = wp_count_posts()->publish;
    
    global $wpdb;
    $comment_count = $wpdb->get_var(
        "SELECT COUNT(*) 
        FROM {$wpdb->comments} c
        INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
        WHERE c.comment_approved = '1'
        AND p.post_type = 'post'
        AND p.post_status = 'publish'"
    );
    
    $bookmarks_count = count(get_bookmarks(array('hide_invisible' => 1)));
    
    echo '<div style="padding: 10px;">';
    echo '<p><strong>总访问量：</strong>' . number_format($page_views) . ' 次</p>';
    echo '<p><strong>文章总数：</strong>' . $post_count . ' 篇</p>';
    echo '<p><strong>文章评论：</strong>' . $comment_count . ' 条</p>';
    echo '<p><strong>友链数量：</strong>' . $bookmarks_count . ' 个</p>';
    echo '</div>';
}

// 在插件激活时设置时区相关选项
function site_statistics_activate() {
    // 确保访问量选项存在
    if (false === get_option('site_statistics_page_views')) {
        update_option('site_statistics_page_views', 0);
    }
    
    // 确保CSS版本选项存在
    if (false === get_option('site_statistics_css_version')) {
        update_option('site_statistics_css_version', 0);
    }
}
register_activation_hook(__FILE__, 'site_statistics_activate');

// 添加清除缓存链接到插件列表
function site_statistics_plugin_action_links($links) {
    $settings_link = '<a href="' . admin_url('options-general.php?page=site-statistics') . '">设置</a>';
    $cache_link = '<a href="' . admin_url('options-general.php?page=site-statistics&action=clear_cache') . '">清除缓存</a>';
    array_unshift($links, $cache_link);
    array_unshift($links, $settings_link);
    return $links;
}
add_filter('plugin_action_links_' . plugin_basename(__FILE__), 'site_statistics_plugin_action_links');<?php
/**
 * Plugin Name: 网站数据统计小工具
 * Description: 显示网站运行时间、文章、评论、友链等统计信息
 * Version: 4.0
 * Author: 您的名称
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

class Site_Statistics_Widget extends WP_Widget {
    
    private $page_views_option = 'site_statistics_page_views';
    private $plugin_version = '4.0';
    
    // 构造函数
    public function __construct() {
        parent::__construct(
            'site_statistics_widget',
            '网站数据统计',
            array('description' => '显示网站运行时间、文章、评论、友链等统计信息')
        );
        
        // 注册样式表
        add_action('wp_enqueue_scripts', array($this, 'enqueue_styles'));
        
        // 初始化访问量统计
        add_action('init', array($this, 'init_page_views'));
        
        // 初始化会话
        add_action('init', array($this, 'init_session'));
        
        // 添加内联样式
        add_action('wp_head', array($this, 'add_inline_styles'));
    }
    
    // 注册前端样式
    public function enqueue_styles() {
        if (is_active_widget(false, false, $this->id_base, true)) {
            // 使用文件修改时间作为版本号，确保缓存更新
            $css_file = plugin_dir_path(__FILE__) . 'css/style.css';
            $css_version = file_exists($css_file) ? filemtime($css_file) : $this->plugin_version;
            
            // 添加缓存清除版本
            $cache_version = get_option('site_statistics_css_version', 0);
            if ($cache_version) {
                $css_version = $cache_version;
            }
            
            wp_enqueue_style(
                'site-statistics-style', 
                plugins_url('css/style.css', __FILE__),
                array(),
                $css_version
            );
        }
    }
    
    // 添加内联样式确保覆盖
    public function add_inline_styles() {
        if (is_active_widget(false, false, $this->id_base, true)) {
            echo '<style>
            .site-statistics { 
                background: #ffffff !important; 
                border: 1px solid #eaeaea !important; 
                border-radius: 8px !important; 
                padding: 20px !important;
                box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05) !important;
                font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
                font-size: 13px !important;
                line-height: 1.5 !important;
                color: #333 !important;
            }
            .site-statistics .stat-item { 
                background: transparent !important; 
                background-image: none !important; 
            }
            .site-statistics .stat-main, 
            .site-statistics .stat-details, 
            .site-statistics .stat-info { 
                border-bottom: 1px dashed #e0e0e0 !important; 
            }
            .site-statistics .stat-row, 
            .site-statistics .info-row { 
                border-bottom: 1px dashed #f0f0f0 !important; 
            }
            .site-statistics .footer-time { 
                background: #f9f9f9 !important; 
                border: 1px solid #eaeaea !important; 
            }
            .site-statistics * { 
                background-image: none !important; 
            }
            </style>';
        }
    }
    
    // 初始化会话
    public function init_session() {
        if (!session_id() && !headers_sent()) {
            session_start();
        }
    }
    
    // 初始化访问量
    public function init_page_views() {
        $page_views = get_option($this->page_views_option);
        if ($page_views === false) {
            update_option($this->page_views_option, 0);
        }
    }
    
    // 前端显示
    public function widget($args, $instance) {
        echo $args['before_widget'];
        
        if (!empty($instance['title'])) {
            echo $args['before_title'] . apply_filters('widget_title', $instance['title']) . $args['after_title'];
        }
        
        $this->display_statistics($instance);
        
        echo $args['after_widget'];
    }
    
    // 后台表单
    public function form($instance) {
        // 设置默认值
        $defaults = array(
            'title' => '网站数据统计',
            'start_date' => date('Y-m-d'),
            'guestbook_page_id' => '',
            'admin_user_id' => '',
            'initial_views' => '0',
            'timezone_offset' => '0'
        );
        
        // 显示选项默认值
        $display_defaults = array(
            'show_runtime' => 1,
            'show_articles' => 1,
            'show_wordcount' => 1,
            'show_comments' => 1,
            'show_links' => 1,
            'show_guestbook' => 1,
            'show_rundays' => 1,
            'show_pageviews' => 1,
            'show_login_time' => 1
        );
        
        // 合并所有默认值
        $all_defaults = array_merge($defaults, $display_defaults);
        
        // 确保所有字段都有值
        $instance = wp_parse_args((array) $instance, $all_defaults);
        
        // 获取所有用户
        $users = get_users(array(
            'orderby' => 'display_name',
            'order' => 'ASC'
        ));
        
        // 获取所有页面
        $pages = get_pages();
        
        // 获取当前访问量
        $current_views = get_option($this->page_views_option, 0);
        
        // 显示当前服务器时间
        $current_server_time = date('Y-m-d H:i:s');
        $server_timezone = date_default_timezone_get();
        
        // 获取CSS文件信息
        $css_file = plugin_dir_path(__FILE__) . 'css/style.css';
        $css_mtime = file_exists($css_file) ? date('Y-m-d H:i:s', filemtime($css_file)) : '文件不存在';
        ?>
        
        <div class="site-statistics-admin">
            <!-- 基础设置 -->
            <div class="admin-section">
                <h4>基本设置</h4>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('title')); ?>">标题：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('title')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('title')); ?>" 
                           type="text" value="<?php echo esc_attr($instance['title']); ?>">
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('start_date')); ?>">网站起始日期：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('start_date')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('start_date')); ?>" 
                           type="date" value="<?php echo esc_attr($instance['start_date']); ?>">
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('admin_user_id')); ?>">站长账号：</label>
                    <select class="widefat" id="<?php echo esc_attr($this->get_field_id('admin_user_id')); ?>" 
                            name="<?php echo esc_attr($this->get_field_name('admin_user_id')); ?>">
                        <option value="">-- 选择站长账号 --</option>
                        <?php foreach ($users as $user): ?>
                            <option value="<?php echo $user->ID; ?>" <?php selected($instance['admin_user_id'], $user->ID); ?>>
                                <?php echo esc_html($user->display_name); ?> (<?php echo esc_html($user->user_login); ?>)
                            </option>
                        <?php endforeach; ?>
                    </select>
                </p>
            </div>
            
            <!-- 时间设置 -->
            <div class="admin-section">
                <h4>时间设置</h4>
                
                <div style="background: #f5f5f5; padding: 10px; border-radius: 4px; margin-bottom: 10px;">
                    <p style="margin: 0; font-size: 12px;">
                        <strong>时间信息：</strong><br>
                        服务器时间：<?php echo $current_server_time; ?><br>
                        时区：<?php echo $server_timezone; ?> (UTC<?php echo date('P'); ?>)
                    </p>
                </div>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('timezone_offset')); ?>">时区校正（小时）：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('timezone_offset')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('timezone_offset')); ?>" 
                           type="number" value="<?php echo esc_attr($instance['timezone_offset']); ?>" 
                           step="0.5" min="-12" max="14">
                    <small>格式：数字，如 8, -5, 10.5, -8.5</small>
                </p>
                
                <div style="background: #e8f5e8; padding: 8px; border-radius: 4px; margin-top: 8px;">
                    <small>
                        <strong>校正说明：</strong><br>
                        如果显示时间比实际早，请设置为正数（如：10.5）<br>
                        如果显示时间比实际晚，请设置为负数（如：-10.5）
                    </small>
                </div>
            </div>
            
            <!-- 显示控制 -->
            <div class="admin-section">
                <h4>显示控制</h4>
                
                <div class="display-controls">
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_runtime')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_runtime')); ?>" 
                               value="1" <?php checked($instance['show_runtime'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_runtime')); ?>">
                            显示运行时间
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_articles')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_articles')); ?>" 
                               value="1" <?php checked($instance['show_articles'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_articles')); ?>">
                            显示文章数量
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_wordcount')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_wordcount')); ?>" 
                               value="1" <?php checked($instance['show_wordcount'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_wordcount')); ?>">
                            显示字数统计
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_comments')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_comments')); ?>" 
                               value="1" <?php checked($instance['show_comments'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_comments')); ?>">
                            显示文章评论
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_links')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_links')); ?>" 
                               value="1" <?php checked($instance['show_links'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_links')); ?>">
                            显示邻居友链
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_guestbook')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_guestbook')); ?>" 
                               value="1" <?php checked($instance['show_guestbook'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_guestbook')); ?>">
                            显示好友留言
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_rundays')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_rundays')); ?>" 
                               value="1" <?php checked($instance['show_rundays'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_rundays')); ?>">
                            显示详细运行时间
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_pageviews')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_pageviews')); ?>" 
                               value="1" <?php checked($instance['show_pageviews'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_pageviews')); ?>">
                            显示页面访问量
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_login_time')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_login_time')); ?>" 
                               value="1" <?php checked($instance['show_login_time'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_login_time')); ?>">
                            显示最后登录时间
                        </label>
                    </p>
                </div>
            </div>
            
            <!-- 数据设置 -->
            <div class="admin-section">
                <h4>数据设置</h4>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('guestbook_page_id')); ?>">留言板页面：</label>
                    <select class="widefat" id="<?php echo esc_attr($this->get_field_id('guestbook_page_id')); ?>" 
                            name="<?php echo esc_attr($this->get_field_name('guestbook_page_id')); ?>">
                        <option value="">-- 无留言板 --</option>
                        <?php foreach ($pages as $page): ?>
                            <option value="<?php echo $page->ID; ?>" <?php selected($instance['guestbook_page_id'], $page->ID); ?>>
                                <?php echo esc_html($page->post_title); ?>
                            </option>
                        <?php endforeach; ?>
                    </select>
                </p>
                
                <p>
                    <label>当前访问量：</label>
                    <span style="font-weight: bold; color: #333;"><?php echo number_format($current_views); ?> 次</span>
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('initial_views')); ?>">设置访问量：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('initial_views')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('initial_views')); ?>" 
                           type="number" value="<?php echo esc_attr($instance['initial_views']); ?>" min="0" step="1">
                    <small>设置后点击"保存"生效</small>
                </p>
            </div>
            
            <!-- CSS信息 -->
            <div class="admin-section">
                <h4>样式信息</h4>
                <div style="background: #f0f8ff; padding: 10px; border-radius: 4px; margin-bottom: 10px;">
                    <p style="margin: 0; font-size: 12px;">
                        <strong>CSS文件信息：</strong><br>
                        CSS最后修改：<?php echo $css_mtime; ?><br>
                        如果样式未更新：<br>
                        1. 按Ctrl+F5强制刷新<br>
                        2. <a href="<?php echo admin_url('options-general.php?page=site-statistics&action=clear_cache'); ?>" style="color: #0073aa;">点击清除CSS缓存</a>
                    </p>
                </div>
            </div>
        </div>
        
        <style>
        .site-statistics-admin {
            border: 1px solid #e0e0e0;
            border-radius: 4px;
            padding: 15px;
            background: #fafafa;
        }
        .admin-section {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid #e0e0e0;
        }
        .admin-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }
        .admin-section h4 {
            margin: 0 0 12px 0;
            color: #333;
            font-size: 14px;
        }
        .display-controls p {
            margin-bottom: 8px;
        }
        </style>
        <?php
    }
    
    // 更新设置
    public function update($new_instance, $old_instance) {
        $instance = array();
        
        // 基础设置
        $instance['title'] = !empty($new_instance['title']) ? sanitize_text_field($new_instance['title']) : '';
        $instance['start_date'] = !empty($new_instance['start_date']) ? sanitize_text_field($new_instance['start_date']) : date('Y-m-d');
        $instance['guestbook_page_id'] = isset($new_instance['guestbook_page_id']) ? intval($new_instance['guestbook_page_id']) : '';
        $instance['admin_user_id'] = isset($new_instance['admin_user_id']) ? intval($new_instance['admin_user_id']) : '';
        $instance['initial_views'] = isset($new_instance['initial_views']) ? intval($new_instance['initial_views']) : 0;
        $instance['timezone_offset'] = isset($new_instance['timezone_offset']) ? floatval($new_instance['timezone_offset']) : 0;
        
        // 显示选项
        $instance['show_runtime'] = isset($new_instance['show_runtime']) ? 1 : 0;
        $instance['show_articles'] = isset($new_instance['show_articles']) ? 1 : 0;
        $instance['show_wordcount'] = isset($new_instance['show_wordcount']) ? 1 : 0;
        $instance['show_comments'] = isset($new_instance['show_comments']) ? 1 : 0;
        $instance['show_links'] = isset($new_instance['show_links']) ? 1 : 0;
        $instance['show_guestbook'] = isset($new_instance['show_guestbook']) ? 1 : 0;
        $instance['show_rundays'] = isset($new_instance['show_rundays']) ? 1 : 0;
        $instance['show_pageviews'] = isset($new_instance['show_pageviews']) ? 1 : 0;
        $instance['show_login_time'] = isset($new_instance['show_login_time']) ? 1 : 0;
        
        // 更新访问量
        if ($instance['initial_views'] > 0) {
            $current_views = get_option($this->page_views_option, 0);
            if ($instance['initial_views'] > $current_views) {
                update_option($this->page_views_option, $instance['initial_views']);
            }
        }
        
        return $instance;
    }
    
    // 显示统计数据
    private function display_statistics($instance) {
        // 确保显示选项存在且正确
        $instance = wp_parse_args((array) $instance, array(
            'show_runtime' => 1,
            'show_articles' => 1,
            'show_wordcount' => 1,
            'show_comments' => 1,
            'show_links' => 1,
            'show_guestbook' => 1,
            'show_rundays' => 1,
            'show_pageviews' => 1,
            'show_login_time' => 1
        ));
        
        // 获取数据
        $data = $this->get_statistics_data($instance);
        
        // 如果没有设置站长，强制不显示登录时间
        if (empty($instance['admin_user_id'])) {
            $instance['show_login_time'] = 0;
        }
        
        ?>
        <div class="site-statistics">
            <!-- 主要统计 -->
            <?php if ($instance['show_runtime'] || $instance['show_articles']): ?>
            <div class="stat-main">
                <?php if ($instance['show_runtime']): ?>
                <div class="stat-item">
                    <div class="stat-label">运行时间</div>
                    <div class="stat-value"><?php echo $data['runtime']['years']; ?> 年</div>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_articles']): ?>
                <div class="stat-item">
                    <div class="stat-label">文章数量</div>
                    <div class="stat-value"><?php echo $data['post_count']; ?> 篇</div>
                    <?php if ($instance['show_wordcount']): ?>
                    <div class="stat-sub"><?php echo number_format($data['wordcount'] / 10000, 1); ?> 万字</div>
                    <?php endif; ?>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 详细统计 -->
            <?php if (($instance['show_comments'] && $data['article_comments'] > 0) || 
                      ($instance['show_links'] && $data['bookmarks_count'] > 0) || 
                      ($instance['show_guestbook'] && $data['guestbook_comments'] > 0)): ?>
            <div class="stat-details">
                <?php if ($instance['show_comments'] && $data['article_comments'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">文章评论</span>
                    <span class="detail-value"><?php echo $data['article_comments']; ?> 条</span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_links'] && $data['bookmarks_count'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">邻居友链</span>
                    <span class="detail-value"><?php echo $data['bookmarks_count']; ?> 个</span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_guestbook'] && $data['guestbook_comments'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">好友留言</span>
                    <span class="detail-value"><?php echo $data['guestbook_comments']; ?> 条</span>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 运行信息 -->
            <?php if ($instance['show_rundays'] || $instance['show_pageviews']): ?>
            <div class="stat-info">
                <?php if ($instance['show_rundays']): ?>
                <div class="info-row">
                    <span class="info-label">网站运行</span>
                    <span class="info-value">
                        <?php echo $data['runtime']['years']; ?>年
                        <?php echo $data['runtime']['months']; ?>月
                        <?php echo $data['runtime']['days']; ?>天
                    </span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_pageviews']): ?>
                <div class="info-row">
                    <span class="info-label">页面访问</span>
                    <span class="info-value"><?php echo number_format($data['page_views']); ?> 次</span>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 站长信息 -->
            <?php if ($instance['show_login_time'] && !empty($data['last_login'])): ?>
            <div class="stat-footer">
                <div class="footer-label">站长最后登录</div>
                <div class="footer-time"><?php echo $data['last_login']; ?></div>
            </div>
            <?php endif; ?>
        </div>
        <?php
    }
    
    // 获取统计数据
    private function get_statistics_data($instance) {
        $data = array();
        
        // 文章数据
        $data['post_count'] = wp_count_posts()->publish;
        $data['wordcount'] = $this->calculate_wordcount();
        
        // 评论数据
        $data['article_comments'] = $this->get_article_comments_count();
        $data['guestbook_comments'] = $this->get_guestbook_comments_count($instance);
        
        // 友链数据
        $data['bookmarks_count'] = $this->get_bookmarks_count();
        
        // 运行时间
        $data['runtime'] = $this->calculate_runtime($instance['start_date']);
        
        // 页面访问量
        $data['page_views'] = $this->get_page_views();
        
        // 最后登录时间
        if (!empty($instance['admin_user_id'])) {
            $data['last_login'] = $this->get_admin_last_login($instance);
        } else {
            $data['last_login'] = '';
        }
        
        return $data;
    }
    
    // 计算字数
    private function calculate_wordcount() {
        static $wordcount = null;
        
        if ($wordcount === null) {
            global $wpdb;
            
            $result = $wpdb->get_var(
                "SELECT SUM(
                    LENGTH(post_content) - LENGTH(REPLACE(post_content, ' ', '')) + 1
                ) as wordcount 
                FROM {$wpdb->posts} 
                WHERE post_type = 'post' 
                AND post_status = 'publish'"
            );
            
            $wordcount = $result ? intval($result) : 0;
        }
        
        return $wordcount;
    }
    
    // 获取文章评论数量
    private function get_article_comments_count() {
        global $wpdb;
        
        $count = $wpdb->get_var(
            "SELECT COUNT(*) 
            FROM {$wpdb->comments} c
            INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
            WHERE c.comment_approved = '1'
            AND p.post_type = 'post'
            AND p.post_status = 'publish'"
        );
        
        return $count ? intval($count) : 0;
    }
    
    // 获取留言板评论数量
    private function get_guestbook_comments_count($instance) {
        if (empty($instance['guestbook_page_id'])) {
            return 0;
        }
        
        global $wpdb;
        
        $count = $wpdb->get_var($wpdb->prepare(
            "SELECT COUNT(*) 
            FROM {$wpdb->comments} 
            WHERE comment_approved = '1' 
            AND comment_post_ID = %d",
            $instance['guestbook_page_id']
        ));
        
        return $count ? intval($count) : 0;
    }
    
    // 获取友情链接数量
    private function get_bookmarks_count() {
        $bookmarks = get_bookmarks(array('hide_invisible' => 1));
        return count($bookmarks);
    }
    
    // 计算运行时间
    private function calculate_runtime($start_date) {
        try {
            $start = new DateTime($start_date);
            $now = new DateTime();
            $interval = $start->diff($now);
            
            return array(
                'years' => $interval->y,
                'months' => $interval->m,
                'days' => $interval->d
            );
        } catch (Exception $e) {
            return array('years' => 0, 'months' => 0, 'days' => 0);
        }
    }
    
    // 获取页面访问量
    private function get_page_views() {
        return get_option($this->page_views_option, 0);
    }
    
    // 获取站长最后登录时间
    private function get_admin_last_login($instance) {
        $admin_id = $instance['admin_user_id'];
        
        if (empty($admin_id)) {
            return '';
        }
        
        // 获取时区偏移量
        $timezone_offset = isset($instance['timezone_offset']) ? floatval($instance['timezone_offset']) : 0;
        
        // 方法1：从专用字段获取
        $last_login = get_user_meta($admin_id, 'site_stats_last_login_corrected', true);
        
        // 方法2：如果没有专用字段，从普通字段获取并校正
        if (empty($last_login)) {
            $last_login_raw = get_user_meta($admin_id, 'last_login', true);
            
            if (!empty($last_login_raw)) {
                // 应用时区校正
                $last_login = $this->apply_timezone_correction($last_login_raw, $timezone_offset);
                update_user_meta($admin_id, 'site_stats_last_login_corrected', $last_login);
            }
        }
        
        // 方法3：从会话获取
        if (empty($last_login)) {
            $session_tokens = get_user_meta($admin_id, 'session_tokens', true);
            if (!empty($session_tokens) && is_array($session_tokens)) {
                $last_login_time = 0;
                foreach ($session_tokens as $session) {
                    if (isset($session['login']) && $session['login'] > $last_login_time) {
                        $last_login_time = $session['login'];
                    }
                }
                if ($last_login_time > 0) {
                    $last_login = $this->apply_timezone_correction(
                        date('Y-m-d H:i:s', $last_login_time), 
                        $timezone_offset
                    );
                    update_user_meta($admin_id, 'site_stats_last_login_corrected', $last_login);
                }
            }
        }
        
        return !empty($last_login) ? $last_login : '暂无记录';
    }
    
    // 应用时区校正
    private function apply_timezone_correction($time_string, $offset_hours) {
        try {
            // 解析时间
            $datetime = new DateTime($time_string);
            
            // 应用时区偏移
            if ($offset_hours != 0) {
                $interval = DateInterval::createFromDateString(abs($offset_hours) . ' hours');
                if ($offset_hours > 0) {
                    $datetime->add($interval);
                } else {
                    $datetime->sub($interval);
                }
            }
            
            // 返回格式化的时间
            return $datetime->format('Y-m-d H:i:s');
            
        } catch (Exception $e) {
            return $time_string;
        }
    }
}

// 注册小工具
function register_site_statistics_widget() {
    register_widget('Site_Statistics_Widget');
}
add_action('widgets_init', 'register_site_statistics_widget');

// 记录页面访问量
function site_statistics_count_page_view() {
    // 不记录后台访问
    if (is_admin()) {
        return;
    }
    
    // 不记录爬虫
    if (isset($_SERVER['HTTP_USER_AGENT'])) {
        $user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
        $bots = array('bot', 'spider', 'crawl', 'scrape', 'slurp', 'curl', 'wget', 'python', 'java');
        
        foreach ($bots as $bot) {
            if (strpos($user_agent, $bot) !== false) {
                return;
            }
        }
    }
    
    // 使用会话防止重复计数（24小时）
    if (!isset($_SESSION['site_stats_last_count'])) {
        $_SESSION['site_stats_last_count'] = time();
    } else {
        if (time() - $_SESSION['site_stats_last_count'] < 86400) {
            return;
        }
    }
    
    // 增加访问量
    $current_views = get_option('site_statistics_page_views', 0);
    update_option('site_statistics_page_views', $current_views + 1);
    
    // 更新最后计数时间
    $_SESSION['site_stats_last_count'] = time();
}
add_action('wp', 'site_statistics_count_page_view');

// 记录用户最后登录时间
function site_statistics_record_last_login($user_login, $user) {
    if ($user && $user->ID) {
        // 存储当前时间
        $current_time = current_time('mysql');
        
        // 存储到专用字段
        update_user_meta($user->ID, 'last_login', $current_time);
        
        // 清除校正后的缓存
        delete_user_meta($user->ID, 'site_stats_last_login_corrected');
    }
}
add_action('wp_login', 'site_statistics_record_last_login', 10, 2);

// 添加快捷码支持
function site_statistics_shortcode($atts) {
    $atts = shortcode_atts(array(
        'title' => ''
    ), $atts);
    
    ob_start();
    
    echo '<div class="site-statistics-shortcode">';
    if (!empty($atts['title'])) {
        echo '<h3>' . esc_html($atts['title']) . '</h3>';
    }
    
    // 创建默认实例
    $instance = array(
        'title' => '',
        'start_date' => '2002-04-20',
        'guestbook_page_id' => '',
        'admin_user_id' => 1,
        'initial_views' => 0,
        'timezone_offset' => 0,
        'show_runtime' => 1,
        'show_articles' => 1,
        'show_wordcount' => 1,
        'show_comments' => 1,
        'show_links' => 1,
        'show_guestbook' => 1,
        'show_rundays' => 1,
        'show_pageviews' => 1,
        'show_login_time' => 1
    );
    
    $widget = new Site_Statistics_Widget();
    $widget->display_statistics($instance);
    echo '</div>';
    
    return ob_get_clean();
}
add_shortcode('site_statistics', 'site_statistics_shortcode');

// 添加管理菜单
function site_statistics_add_admin_menu() {
    add_options_page(
        '网站统计设置',
        '网站统计',
        'manage_options',
        'site-statistics',
        'site_statistics_admin_page'
    );
}
add_action('admin_menu', 'site_statistics_add_admin_menu');

// 管理页面
function site_statistics_admin_page() {
    if (!current_user_can('manage_options')) {
        return;
    }
    
    // 处理表单提交
    if (isset($_POST['action'])) {
        if ($_POST['action'] === 'reset_views' && check_admin_referer('site_stats_reset')) {
            update_option('site_statistics_page_views', 0);
            echo '<div class="notice notice-success"><p>访问量已重置为0</p></div>';
        } elseif ($_POST['action'] === 'set_views' && check_admin_referer('site_stats_set')) {
            $views = intval($_POST['page_views']);
            update_option('site_statistics_page_views', $views);
            echo '<div class="notice notice-success"><p>访问量已设置为 ' . number_format($views) . '</p></div>';
        } elseif ($_POST['action'] === 'clear_login_cache' && check_admin_referer('site_stats_clear_cache')) {
            // 清除所有用户的登录时间缓存
            global $wpdb;
            $wpdb->query("DELETE FROM {$wpdb->usermeta} WHERE meta_key = 'site_stats_last_login_corrected'");
            echo '<div class="notice notice-success"><p>已清除登录时间缓存</p></div>';
        } elseif ($_POST['action'] === 'clear_css_cache' && check_admin_referer('site_stats_clear_css_cache')) {
            // 清除CSS缓存
            update_option('site_statistics_css_version', time());
            echo '<div class="notice notice-success"><p>CSS缓存已清除，请刷新页面查看新样式</p></div>';
        }
    }
    
    // 获取统计数据
    $page_views = get_option('site_statistics_page_views', 0);
    $post_count = wp_count_posts()->publish;
    
    global $wpdb;
    $comment_count = $wpdb->get_var(
        "SELECT COUNT(*) 
        FROM {$wpdb->comments} c
        INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
        WHERE c.comment_approved = '1'
        AND p.post_type = 'post'
        AND p.post_status = 'publish'"
    );
    
    $bookmarks_count = count(get_bookmarks(array('hide_invisible' => 1)));
    
    ?>
    <div class="wrap">
        <h1>网站统计设置</h1>
        
        <div class="site-stats-admin-page">
            <div class="stats-overview">
                <h2>统计数据概览</h2>
                <table class="widefat">
                    <tr>
                        <td><strong>页面访问量</strong></td>
                        <td><?php echo number_format($page_views); ?> 次</td>
                    </tr>
                    <tr>
                        <td><strong>文章总数</strong></td>
                        <td><?php echo $post_count; ?> 篇</td>
                    </tr>
                    <tr>
                        <td><strong>文章评论</strong></td>
                        <td><?php echo $comment_count; ?> 条</td>
                    </tr>
                    <tr>
                        <td><strong>友情链接</strong></td>
                        <td><?php echo $bookmarks_count; ?> 个</td>
                    </tr>
                </table>
            </div>
            
            <div class="stats-controls">
                <h2>访问量控制</h2>
                <form method="post" style="margin-bottom: 20px;">
                    <?php wp_nonce_field('site_stats_set'); ?>
                    <input type="hidden" name="action" value="set_views">
                    <p>
                        <label for="page_views">设置访问量：</label>
                        <input type="number" name="page_views" value="<?php echo $page_views; ?>" class="regular-text">
                        <input type="submit" value="设置" class="button button-primary">
                    </p>
                </form>
                
                <form method="post">
                    <?php wp_nonce_field('site_stats_reset'); ?>
                    <input type="hidden" name="action" value="reset_views">
                    <p>
                        <input type="submit" value="重置访问量为0" class="button button-secondary" 
                               onclick="return confirm('确定要重置访问量吗？这将无法恢复！');">
                    </p>
                </form>
                
                <h2>缓存管理</h2>
                <form method="post" style="margin-bottom: 15px;">
                    <?php wp_nonce_field('site_stats_clear_cache'); ?>
                    <input type="hidden" name="action" value="clear_login_cache">
                    <p>
                        <input type="submit" value="清除登录时间缓存" class="button">
                        <small>如果登录时间显示不正确，请清除缓存后重新登录</small>
                    </p>
                </form>
                
                <form method="post">
                    <?php wp_nonce_field('site_stats_clear_css_cache'); ?>
                    <input type="hidden" name="action" value="clear_css_cache">
                    <p>
                        <input type="submit" value="清除CSS样式缓存" class="button">
                        <small>如果样式没有更新，请清除CSS缓存</small>
                    </p>
                </form>
            </div>
        </div>
        
        <div class="stats-info">
            <h3>使用说明</h3>
            <ul>
                <li><strong>时区校正：</strong>如果显示的时间比实际时间早，请设置为正数（如：10.5）</li>
                <li><strong>显示控制：</strong>取消勾选的项目将不会在前台显示</li>
                <li><strong>文章评论：</strong>只统计文章（post类型）的评论，不包括页面和其他类型</li>
                <li><strong>好友留言：</strong>需要选择留言板页面才能统计</li>
                <li><strong>站长登录：</strong>需要选择站长账号才能显示</li>
                <li><strong>访问量：</strong>自动过滤爬虫，同一会话24小时内只计数一次</li>
                <li><strong>样式问题：</strong>如果样式未更新，请清除CSS缓存或按Ctrl+F5强制刷新</li>
            </ul>
        </div>
    </div>
    
    <style>
    .site-stats-admin-page {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin: 20px 0;
    }
    .stats-overview table {
        width: 100%;
        border-collapse: collapse;
    }
    .stats-overview td {
        padding: 10px;
        border-bottom: 1px solid #eee;
    }
    .stats-controls form {
        background: #f9f9f9;
        padding: 15px;
        border-radius: 4px;
        margin-bottom: 15px;
    }
    .stats-info ul {
        list-style: disc;
        margin-left: 20px;
    }
    .stats-info li {
        margin-bottom: 5px;
    }
    @media (max-width: 768px) {
        .site-stats-admin-page {
            grid-template-columns: 1fr;
        }
    }
    </style>
    <?php
}

// 添加仪表板小工具
function site_statistics_dashboard_widget() {
    wp_add_dashboard_widget(
        'site_statistics_dashboard',
        '网站统计概览',
        'site_statistics_dashboard_content'
    );
}
add_action('wp_dashboard_setup', 'site_statistics_dashboard_widget');

function site_statistics_dashboard_content() {
    $page_views = get_option('site_statistics_page_views', 0);
    $post_count = wp_count_posts()->publish;
    
    global $wpdb;
    $comment_count = $wpdb->get_var(
        "SELECT COUNT(*) 
        FROM {$wpdb->comments} c
        INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
        WHERE c.comment_approved = '1'
        AND p.post_type = 'post'
        AND p.post_status = 'publish'"
    );
    
    $bookmarks_count = count(get_bookmarks(array('hide_invisible' => 1)));
    
    echo '<div style="padding: 10px;">';
    echo '<p><strong>总访问量：</strong>' . number_format($page_views) . ' 次</p>';
    echo '<p><strong>文章总数：</strong>' . $post_count . ' 篇</p>';
    echo '<p><strong>文章评论：</strong>' . $comment_count . ' 条</p>';
    echo '<p><strong>友链数量：</strong>' . $bookmarks_count . ' 个</p>';
    echo '</div>';
}

// 在插件激活时设置时区相关选项
function site_statistics_activate() {
    // 确保访问量选项存在
    if (false === get_option('site_statistics_page_views')) {
        update_option('site_statistics_page_views', 0);
    }
    
    // 确保CSS版本选项存在
    if (false === get_option('site_statistics_css_version')) {
        update_option('site_statistics_css_version', 0);
    }
}
register_activation_hook(__FILE__, 'site_statistics_activate');

// 添加清除缓存链接到插件列表
function site_statistics_plugin_action_links($links) {
    $settings_link = '<a href="' . admin_url('options-general.php?page=site-statistics') . '">设置</a>';
    $cache_link = '<a href="' . admin_url('options-general.php?page=site-statistics&action=clear_cache') . '">清除缓存</a>';
    array_unshift($links, $cache_link);
    array_unshift($links, $settings_link);
    return $links;
}
add_filter('plugin_action_links_' . plugin_basename(__FILE__), 'site_statistics_plugin_action_links');<?php
/**
 * Plugin Name: 网站数据统计小工具
 * Description: 显示网站运行时间、文章、评论、友链等统计信息
 * Version: 4.0
 * Author: 您的名称
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

class Site_Statistics_Widget extends WP_Widget {
    
    private $page_views_option = 'site_statistics_page_views';
    private $plugin_version = '4.0';
    
    // 构造函数
    public function __construct() {
        parent::__construct(
            'site_statistics_widget',
            '网站数据统计',
            array('description' => '显示网站运行时间、文章、评论、友链等统计信息')
        );
        
        // 注册样式表
        add_action('wp_enqueue_scripts', array($this, 'enqueue_styles'));
        
        // 初始化访问量统计
        add_action('init', array($this, 'init_page_views'));
        
        // 初始化会话
        add_action('init', array($this, 'init_session'));
        
        // 添加内联样式
        add_action('wp_head', array($this, 'add_inline_styles'));
    }
    
    // 注册前端样式
    public function enqueue_styles() {
        if (is_active_widget(false, false, $this->id_base, true)) {
            // 使用文件修改时间作为版本号，确保缓存更新
            $css_file = plugin_dir_path(__FILE__) . 'css/style.css';
            $css_version = file_exists($css_file) ? filemtime($css_file) : $this->plugin_version;
            
            // 添加缓存清除版本
            $cache_version = get_option('site_statistics_css_version', 0);
            if ($cache_version) {
                $css_version = $cache_version;
            }
            
            wp_enqueue_style(
                'site-statistics-style', 
                plugins_url('css/style.css', __FILE__),
                array(),
                $css_version
            );
        }
    }
    
    // 添加内联样式确保覆盖
    public function add_inline_styles() {
        if (is_active_widget(false, false, $this->id_base, true)) {
            echo '<style>
            .site-statistics { 
                background: #ffffff !important; 
                border: 1px solid #eaeaea !important; 
                border-radius: 8px !important; 
                padding: 20px !important;
                box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05) !important;
                font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
                font-size: 13px !important;
                line-height: 1.5 !important;
                color: #333 !important;
            }
            .site-statistics .stat-item { 
                background: transparent !important; 
                background-image: none !important; 
            }
            .site-statistics .stat-main, 
            .site-statistics .stat-details, 
            .site-statistics .stat-info { 
                border-bottom: 1px dashed #e0e0e0 !important; 
            }
            .site-statistics .stat-row, 
            .site-statistics .info-row { 
                border-bottom: 1px dashed #f0f0f0 !important; 
            }
            .site-statistics .footer-time { 
                background: #f9f9f9 !important; 
                border: 1px solid #eaeaea !important; 
            }
            .site-statistics * { 
                background-image: none !important; 
            }
            </style>';
        }
    }
    
    // 初始化会话
    public function init_session() {
        if (!session_id() && !headers_sent()) {
            session_start();
        }
    }
    
    // 初始化访问量
    public function init_page_views() {
        $page_views = get_option($this->page_views_option);
        if ($page_views === false) {
            update_option($this->page_views_option, 0);
        }
    }
    
    // 前端显示
    public function widget($args, $instance) {
        echo $args['before_widget'];
        
        if (!empty($instance['title'])) {
            echo $args['before_title'] . apply_filters('widget_title', $instance['title']) . $args['after_title'];
        }
        
        $this->display_statistics($instance);
        
        echo $args['after_widget'];
    }
    
    // 后台表单
    public function form($instance) {
        // 设置默认值
        $defaults = array(
            'title' => '网站数据统计',
            'start_date' => date('Y-m-d'),
            'guestbook_page_id' => '',
            'admin_user_id' => '',
            'initial_views' => '0',
            'timezone_offset' => '0'
        );
        
        // 显示选项默认值
        $display_defaults = array(
            'show_runtime' => 1,
            'show_articles' => 1,
            'show_wordcount' => 1,
            'show_comments' => 1,
            'show_links' => 1,
            'show_guestbook' => 1,
            'show_rundays' => 1,
            'show_pageviews' => 1,
            'show_login_time' => 1
        );
        
        // 合并所有默认值
        $all_defaults = array_merge($defaults, $display_defaults);
        
        // 确保所有字段都有值
        $instance = wp_parse_args((array) $instance, $all_defaults);
        
        // 获取所有用户
        $users = get_users(array(
            'orderby' => 'display_name',
            'order' => 'ASC'
        ));
        
        // 获取所有页面
        $pages = get_pages();
        
        // 获取当前访问量
        $current_views = get_option($this->page_views_option, 0);
        
        // 显示当前服务器时间
        $current_server_time = date('Y-m-d H:i:s');
        $server_timezone = date_default_timezone_get();
        
        // 获取CSS文件信息
        $css_file = plugin_dir_path(__FILE__) . 'css/style.css';
        $css_mtime = file_exists($css_file) ? date('Y-m-d H:i:s', filemtime($css_file)) : '文件不存在';
        ?>
        
        <div class="site-statistics-admin">
            <!-- 基础设置 -->
            <div class="admin-section">
                <h4>基本设置</h4>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('title')); ?>">标题：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('title')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('title')); ?>" 
                           type="text" value="<?php echo esc_attr($instance['title']); ?>">
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('start_date')); ?>">网站起始日期：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('start_date')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('start_date')); ?>" 
                           type="date" value="<?php echo esc_attr($instance['start_date']); ?>">
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('admin_user_id')); ?>">站长账号：</label>
                    <select class="widefat" id="<?php echo esc_attr($this->get_field_id('admin_user_id')); ?>" 
                            name="<?php echo esc_attr($this->get_field_name('admin_user_id')); ?>">
                        <option value="">-- 选择站长账号 --</option>
                        <?php foreach ($users as $user): ?>
                            <option value="<?php echo $user->ID; ?>" <?php selected($instance['admin_user_id'], $user->ID); ?>>
                                <?php echo esc_html($user->display_name); ?> (<?php echo esc_html($user->user_login); ?>)
                            </option>
                        <?php endforeach; ?>
                    </select>
                </p>
            </div>
            
            <!-- 时间设置 -->
            <div class="admin-section">
                <h4>时间设置</h4>
                
                <div style="background: #f5f5f5; padding: 10px; border-radius: 4px; margin-bottom: 10px;">
                    <p style="margin: 0; font-size: 12px;">
                        <strong>时间信息：</strong><br>
                        服务器时间：<?php echo $current_server_time; ?><br>
                        时区：<?php echo $server_timezone; ?> (UTC<?php echo date('P'); ?>)
                    </p>
                </div>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('timezone_offset')); ?>">时区校正（小时）：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('timezone_offset')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('timezone_offset')); ?>" 
                           type="number" value="<?php echo esc_attr($instance['timezone_offset']); ?>" 
                           step="0.5" min="-12" max="14">
                    <small>格式：数字，如 8, -5, 10.5, -8.5</small>
                </p>
                
                <div style="background: #e8f5e8; padding: 8px; border-radius: 4px; margin-top: 8px;">
                    <small>
                        <strong>校正说明：</strong><br>
                        如果显示时间比实际早，请设置为正数（如：10.5）<br>
                        如果显示时间比实际晚，请设置为负数（如：-10.5）
                    </small>
                </div>
            </div>
            
            <!-- 显示控制 -->
            <div class="admin-section">
                <h4>显示控制</h4>
                
                <div class="display-controls">
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_runtime')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_runtime')); ?>" 
                               value="1" <?php checked($instance['show_runtime'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_runtime')); ?>">
                            显示运行时间
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_articles')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_articles')); ?>" 
                               value="1" <?php checked($instance['show_articles'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_articles')); ?>">
                            显示文章数量
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_wordcount')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_wordcount')); ?>" 
                               value="1" <?php checked($instance['show_wordcount'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_wordcount')); ?>">
                            显示字数统计
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_comments')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_comments')); ?>" 
                               value="1" <?php checked($instance['show_comments'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_comments')); ?>">
                            显示文章评论
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_links')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_links')); ?>" 
                               value="1" <?php checked($instance['show_links'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_links')); ?>">
                            显示邻居友链
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_guestbook')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_guestbook')); ?>" 
                               value="1" <?php checked($instance['show_guestbook'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_guestbook')); ?>">
                            显示好友留言
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_rundays')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_rundays')); ?>" 
                               value="1" <?php checked($instance['show_rundays'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_rundays')); ?>">
                            显示详细运行时间
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_pageviews')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_pageviews')); ?>" 
                               value="1" <?php checked($instance['show_pageviews'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_pageviews')); ?>">
                            显示页面访问量
                        </label>
                    </p>
                    
                    <p>
                        <input type="checkbox" 
                               id="<?php echo esc_attr($this->get_field_id('show_login_time')); ?>" 
                               name="<?php echo esc_attr($this->get_field_name('show_login_time')); ?>" 
                               value="1" <?php checked($instance['show_login_time'], 1); ?>>
                        <label for="<?php echo esc_attr($this->get_field_id('show_login_time')); ?>">
                            显示最后登录时间
                        </label>
                    </p>
                </div>
            </div>
            
            <!-- 数据设置 -->
            <div class="admin-section">
                <h4>数据设置</h4>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('guestbook_page_id')); ?>">留言板页面：</label>
                    <select class="widefat" id="<?php echo esc_attr($this->get_field_id('guestbook_page_id')); ?>" 
                            name="<?php echo esc_attr($this->get_field_name('guestbook_page_id')); ?>">
                        <option value="">-- 无留言板 --</option>
                        <?php foreach ($pages as $page): ?>
                            <option value="<?php echo $page->ID; ?>" <?php selected($instance['guestbook_page_id'], $page->ID); ?>>
                                <?php echo esc_html($page->post_title); ?>
                            </option>
                        <?php endforeach; ?>
                    </select>
                </p>
                
                <p>
                    <label>当前访问量：</label>
                    <span style="font-weight: bold; color: #333;"><?php echo number_format($current_views); ?> 次</span>
                </p>
                
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id('initial_views')); ?>">设置访问量：</label>
                    <input class="widefat" id="<?php echo esc_attr($this->get_field_id('initial_views')); ?>" 
                           name="<?php echo esc_attr($this->get_field_name('initial_views')); ?>" 
                           type="number" value="<?php echo esc_attr($instance['initial_views']); ?>" min="0" step="1">
                    <small>设置后点击"保存"生效</small>
                </p>
            </div>
            
            <!-- CSS信息 -->
            <div class="admin-section">
                <h4>样式信息</h4>
                <div style="background: #f0f8ff; padding: 10px; border-radius: 4px; margin-bottom: 10px;">
                    <p style="margin: 0; font-size: 12px;">
                        <strong>CSS文件信息：</strong><br>
                        CSS最后修改：<?php echo $css_mtime; ?><br>
                        如果样式未更新：<br>
                        1. 按Ctrl+F5强制刷新<br>
                        2. <a href="<?php echo admin_url('options-general.php?page=site-statistics&action=clear_cache'); ?>" style="color: #0073aa;">点击清除CSS缓存</a>
                    </p>
                </div>
            </div>
        </div>
        
        <style>
        .site-statistics-admin {
            border: 1px solid #e0e0e0;
            border-radius: 4px;
            padding: 15px;
            background: #fafafa;
        }
        .admin-section {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid #e0e0e0;
        }
        .admin-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }
        .admin-section h4 {
            margin: 0 0 12px 0;
            color: #333;
            font-size: 14px;
        }
        .display-controls p {
            margin-bottom: 8px;
        }
        </style>
        <?php
    }
    
    // 更新设置
    public function update($new_instance, $old_instance) {
        $instance = array();
        
        // 基础设置
        $instance['title'] = !empty($new_instance['title']) ? sanitize_text_field($new_instance['title']) : '';
        $instance['start_date'] = !empty($new_instance['start_date']) ? sanitize_text_field($new_instance['start_date']) : date('Y-m-d');
        $instance['guestbook_page_id'] = isset($new_instance['guestbook_page_id']) ? intval($new_instance['guestbook_page_id']) : '';
        $instance['admin_user_id'] = isset($new_instance['admin_user_id']) ? intval($new_instance['admin_user_id']) : '';
        $instance['initial_views'] = isset($new_instance['initial_views']) ? intval($new_instance['initial_views']) : 0;
        $instance['timezone_offset'] = isset($new_instance['timezone_offset']) ? floatval($new_instance['timezone_offset']) : 0;
        
        // 显示选项
        $instance['show_runtime'] = isset($new_instance['show_runtime']) ? 1 : 0;
        $instance['show_articles'] = isset($new_instance['show_articles']) ? 1 : 0;
        $instance['show_wordcount'] = isset($new_instance['show_wordcount']) ? 1 : 0;
        $instance['show_comments'] = isset($new_instance['show_comments']) ? 1 : 0;
        $instance['show_links'] = isset($new_instance['show_links']) ? 1 : 0;
        $instance['show_guestbook'] = isset($new_instance['show_guestbook']) ? 1 : 0;
        $instance['show_rundays'] = isset($new_instance['show_rundays']) ? 1 : 0;
        $instance['show_pageviews'] = isset($new_instance['show_pageviews']) ? 1 : 0;
        $instance['show_login_time'] = isset($new_instance['show_login_time']) ? 1 : 0;
        
        // 更新访问量
        if ($instance['initial_views'] > 0) {
            $current_views = get_option($this->page_views_option, 0);
            if ($instance['initial_views'] > $current_views) {
                update_option($this->page_views_option, $instance['initial_views']);
            }
        }
        
        return $instance;
    }
    
    // 显示统计数据
    private function display_statistics($instance) {
        // 确保显示选项存在且正确
        $instance = wp_parse_args((array) $instance, array(
            'show_runtime' => 1,
            'show_articles' => 1,
            'show_wordcount' => 1,
            'show_comments' => 1,
            'show_links' => 1,
            'show_guestbook' => 1,
            'show_rundays' => 1,
            'show_pageviews' => 1,
            'show_login_time' => 1
        ));
        
        // 获取数据
        $data = $this->get_statistics_data($instance);
        
        // 如果没有设置站长，强制不显示登录时间
        if (empty($instance['admin_user_id'])) {
            $instance['show_login_time'] = 0;
        }
        
        ?>
        <div class="site-statistics">
            <!-- 主要统计 -->
            <?php if ($instance['show_runtime'] || $instance['show_articles']): ?>
            <div class="stat-main">
                <?php if ($instance['show_runtime']): ?>
                <div class="stat-item">
                    <div class="stat-label">运行时间</div>
                    <div class="stat-value"><?php echo $data['runtime']['years']; ?> 年</div>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_articles']): ?>
                <div class="stat-item">
                    <div class="stat-label">文章数量</div>
                    <div class="stat-value"><?php echo $data['post_count']; ?> 篇</div>
                    <?php if ($instance['show_wordcount']): ?>
                    <div class="stat-sub"><?php echo number_format($data['wordcount'] / 10000, 1); ?> 万字</div>
                    <?php endif; ?>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 详细统计 -->
            <?php if (($instance['show_comments'] && $data['article_comments'] > 0) || 
                      ($instance['show_links'] && $data['bookmarks_count'] > 0) || 
                      ($instance['show_guestbook'] && $data['guestbook_comments'] > 0)): ?>
            <div class="stat-details">
                <?php if ($instance['show_comments'] && $data['article_comments'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">文章评论</span>
                    <span class="detail-value"><?php echo $data['article_comments']; ?> 条</span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_links'] && $data['bookmarks_count'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">邻居友链</span>
                    <span class="detail-value"><?php echo $data['bookmarks_count']; ?> 个</span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_guestbook'] && $data['guestbook_comments'] > 0): ?>
                <div class="stat-row">
                    <span class="detail-label">好友留言</span>
                    <span class="detail-value"><?php echo $data['guestbook_comments']; ?> 条</span>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 运行信息 -->
            <?php if ($instance['show_rundays'] || $instance['show_pageviews']): ?>
            <div class="stat-info">
                <?php if ($instance['show_rundays']): ?>
                <div class="info-row">
                    <span class="info-label">网站运行</span>
                    <span class="info-value">
                        <?php echo $data['runtime']['years']; ?>年
                        <?php echo $data['runtime']['months']; ?>月
                        <?php echo $data['runtime']['days']; ?>天
                    </span>
                </div>
                <?php endif; ?>
                
                <?php if ($instance['show_pageviews']): ?>
                <div class="info-row">
                    <span class="info-label">页面访问</span>
                    <span class="info-value"><?php echo number_format($data['page_views']); ?> 次</span>
                </div>
                <?php endif; ?>
            </div>
            <?php endif; ?>
            
            <!-- 站长信息 -->
            <?php if ($instance['show_login_time'] && !empty($data['last_login'])): ?>
            <div class="stat-footer">
                <div class="footer-label">站长最后登录</div>
                <div class="footer-time"><?php echo $data['last_login']; ?></div>
            </div>
            <?php endif; ?>
        </div>
        <?php
    }
    
    // 获取统计数据
    private function get_statistics_data($instance) {
        $data = array();
        
        // 文章数据
        $data['post_count'] = wp_count_posts()->publish;
        $data['wordcount'] = $this->calculate_wordcount();
        
        // 评论数据
        $data['article_comments'] = $this->get_article_comments_count();
        $data['guestbook_comments'] = $this->get_guestbook_comments_count($instance);
        
        // 友链数据
        $data['bookmarks_count'] = $this->get_bookmarks_count();
        
        // 运行时间
        $data['runtime'] = $this->calculate_runtime($instance['start_date']);
        
        // 页面访问量
        $data['page_views'] = $this->get_page_views();
        
        // 最后登录时间
        if (!empty($instance['admin_user_id'])) {
            $data['last_login'] = $this->get_admin_last_login($instance);
        } else {
            $data['last_login'] = '';
        }
        
        return $data;
    }
    
    // 计算字数
    private function calculate_wordcount() {
        static $wordcount = null;
        
        if ($wordcount === null) {
            global $wpdb;
            
            $result = $wpdb->get_var(
                "SELECT SUM(
                    LENGTH(post_content) - LENGTH(REPLACE(post_content, ' ', '')) + 1
                ) as wordcount 
                FROM {$wpdb->posts} 
                WHERE post_type = 'post' 
                AND post_status = 'publish'"
            );
            
            $wordcount = $result ? intval($result) : 0;
        }
        
        return $wordcount;
    }
    
    // 获取文章评论数量
    private function get_article_comments_count() {
        global $wpdb;
        
        $count = $wpdb->get_var(
            "SELECT COUNT(*) 
            FROM {$wpdb->comments} c
            INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
            WHERE c.comment_approved = '1'
            AND p.post_type = 'post'
            AND p.post_status = 'publish'"
        );
        
        return $count ? intval($count) : 0;
    }
    
    // 获取留言板评论数量
    private function get_guestbook_comments_count($instance) {
        if (empty($instance['guestbook_page_id'])) {
            return 0;
        }
        
        global $wpdb;
        
        $count = $wpdb->get_var($wpdb->prepare(
            "SELECT COUNT(*) 
            FROM {$wpdb->comments} 
            WHERE comment_approved = '1' 
            AND comment_post_ID = %d",
            $instance['guestbook_page_id']
        ));
        
        return $count ? intval($count) : 0;
    }
    
    // 获取友情链接数量
    private function get_bookmarks_count() {
        $bookmarks = get_bookmarks(array('hide_invisible' => 1));
        return count($bookmarks);
    }
    
    // 计算运行时间
    private function calculate_runtime($start_date) {
        try {
            $start = new DateTime($start_date);
            $now = new DateTime();
            $interval = $start->diff($now);
            
            return array(
                'years' => $interval->y,
                'months' => $interval->m,
                'days' => $interval->d
            );
        } catch (Exception $e) {
            return array('years' => 0, 'months' => 0, 'days' => 0);
        }
    }
    
    // 获取页面访问量
    private function get_page_views() {
        return get_option($this->page_views_option, 0);
    }
    
    // 获取站长最后登录时间
    private function get_admin_last_login($instance) {
        $admin_id = $instance['admin_user_id'];
        
        if (empty($admin_id)) {
            return '';
        }
        
        // 获取时区偏移量
        $timezone_offset = isset($instance['timezone_offset']) ? floatval($instance['timezone_offset']) : 0;
        
        // 方法1：从专用字段获取
        $last_login = get_user_meta($admin_id, 'site_stats_last_login_corrected', true);
        
        // 方法2：如果没有专用字段，从普通字段获取并校正
        if (empty($last_login)) {
            $last_login_raw = get_user_meta($admin_id, 'last_login', true);
            
            if (!empty($last_login_raw)) {
                // 应用时区校正
                $last_login = $this->apply_timezone_correction($last_login_raw, $timezone_offset);
                update_user_meta($admin_id, 'site_stats_last_login_corrected', $last_login);
            }
        }
        
        // 方法3：从会话获取
        if (empty($last_login)) {
            $session_tokens = get_user_meta($admin_id, 'session_tokens', true);
            if (!empty($session_tokens) && is_array($session_tokens)) {
                $last_login_time = 0;
                foreach ($session_tokens as $session) {
                    if (isset($session['login']) && $session['login'] > $last_login_time) {
                        $last_login_time = $session['login'];
                    }
                }
                if ($last_login_time > 0) {
                    $last_login = $this->apply_timezone_correction(
                        date('Y-m-d H:i:s', $last_login_time), 
                        $timezone_offset
                    );
                    update_user_meta($admin_id, 'site_stats_last_login_corrected', $last_login);
                }
            }
        }
        
        return !empty($last_login) ? $last_login : '暂无记录';
    }
    
    // 应用时区校正
    private function apply_timezone_correction($time_string, $offset_hours) {
        try {
            // 解析时间
            $datetime = new DateTime($time_string);
            
            // 应用时区偏移
            if ($offset_hours != 0) {
                $interval = DateInterval::createFromDateString(abs($offset_hours) . ' hours');
                if ($offset_hours > 0) {
                    $datetime->add($interval);
                } else {
                    $datetime->sub($interval);
                }
            }
            
            // 返回格式化的时间
            return $datetime->format('Y-m-d H:i:s');
            
        } catch (Exception $e) {
            return $time_string;
        }
    }
}

// 注册小工具
function register_site_statistics_widget() {
    register_widget('Site_Statistics_Widget');
}
add_action('widgets_init', 'register_site_statistics_widget');

// 记录页面访问量
function site_statistics_count_page_view() {
    // 不记录后台访问
    if (is_admin()) {
        return;
    }
    
    // 不记录爬虫
    if (isset($_SERVER['HTTP_USER_AGENT'])) {
        $user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
        $bots = array('bot', 'spider', 'crawl', 'scrape', 'slurp', 'curl', 'wget', 'python', 'java');
        
        foreach ($bots as $bot) {
            if (strpos($user_agent, $bot) !== false) {
                return;
            }
        }
    }
    
    // 使用会话防止重复计数（24小时）
    if (!isset($_SESSION['site_stats_last_count'])) {
        $_SESSION['site_stats_last_count'] = time();
    } else {
        if (time() - $_SESSION['site_stats_last_count'] < 86400) {
            return;
        }
    }
    
    // 增加访问量
    $current_views = get_option('site_statistics_page_views', 0);
    update_option('site_statistics_page_views', $current_views + 1);
    
    // 更新最后计数时间
    $_SESSION['site_stats_last_count'] = time();
}
add_action('wp', 'site_statistics_count_page_view');

// 记录用户最后登录时间
function site_statistics_record_last_login($user_login, $user) {
    if ($user && $user->ID) {
        // 存储当前时间
        $current_time = current_time('mysql');
        
        // 存储到专用字段
        update_user_meta($user->ID, 'last_login', $current_time);
        
        // 清除校正后的缓存
        delete_user_meta($user->ID, 'site_stats_last_login_corrected');
    }
}
add_action('wp_login', 'site_statistics_record_last_login', 10, 2);

// 添加快捷码支持
function site_statistics_shortcode($atts) {
    $atts = shortcode_atts(array(
        'title' => ''
    ), $atts);
    
    ob_start();
    
    echo '<div class="site-statistics-shortcode">';
    if (!empty($atts['title'])) {
        echo '<h3>' . esc_html($atts['title']) . '</h3>';
    }
    
    // 创建默认实例
    $instance = array(
        'title' => '',
        'start_date' => '2002-04-20',
        'guestbook_page_id' => '',
        'admin_user_id' => 1,
        'initial_views' => 0,
        'timezone_offset' => 0,
        'show_runtime' => 1,
        'show_articles' => 1,
        'show_wordcount' => 1,
        'show_comments' => 1,
        'show_links' => 1,
        'show_guestbook' => 1,
        'show_rundays' => 1,
        'show_pageviews' => 1,
        'show_login_time' => 1
    );
    
    $widget = new Site_Statistics_Widget();
    $widget->display_statistics($instance);
    echo '</div>';
    
    return ob_get_clean();
}
add_shortcode('site_statistics', 'site_statistics_shortcode');

// 添加管理菜单
function site_statistics_add_admin_menu() {
    add_options_page(
        '网站统计设置',
        '网站统计',
        'manage_options',
        'site-statistics',
        'site_statistics_admin_page'
    );
}
add_action('admin_menu', 'site_statistics_add_admin_menu');

// 管理页面
function site_statistics_admin_page() {
    if (!current_user_can('manage_options')) {
        return;
    }
    
    // 处理表单提交
    if (isset($_POST['action'])) {
        if ($_POST['action'] === 'reset_views' && check_admin_referer('site_stats_reset')) {
            update_option('site_statistics_page_views', 0);
            echo '<div class="notice notice-success"><p>访问量已重置为0</p></div>';
        } elseif ($_POST['action'] === 'set_views' && check_admin_referer('site_stats_set')) {
            $views = intval($_POST['page_views']);
            update_option('site_statistics_page_views', $views);
            echo '<div class="notice notice-success"><p>访问量已设置为 ' . number_format($views) . '</p></div>';
        } elseif ($_POST['action'] === 'clear_login_cache' && check_admin_referer('site_stats_clear_cache')) {
            // 清除所有用户的登录时间缓存
            global $wpdb;
            $wpdb->query("DELETE FROM {$wpdb->usermeta} WHERE meta_key = 'site_stats_last_login_corrected'");
            echo '<div class="notice notice-success"><p>已清除登录时间缓存</p></div>';
        } elseif ($_POST['action'] === 'clear_css_cache' && check_admin_referer('site_stats_clear_css_cache')) {
            // 清除CSS缓存
            update_option('site_statistics_css_version', time());
            echo '<div class="notice notice-success"><p>CSS缓存已清除，请刷新页面查看新样式</p></div>';
        }
    }
    
    // 获取统计数据
    $page_views = get_option('site_statistics_page_views', 0);
    $post_count = wp_count_posts()->publish;
    
    global $wpdb;
    $comment_count = $wpdb->get_var(
        "SELECT COUNT(*) 
        FROM {$wpdb->comments} c
        INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
        WHERE c.comment_approved = '1'
        AND p.post_type = 'post'
        AND p.post_status = 'publish'"
    );
    
    $bookmarks_count = count(get_bookmarks(array('hide_invisible' => 1)));
    
    ?>
    <div class="wrap">
        <h1>网站统计设置</h1>
        
        <div class="site-stats-admin-page">
            <div class="stats-overview">
                <h2>统计数据概览</h2>
                <table class="widefat">
                    <tr>
                        <td><strong>页面访问量</strong></td>
                        <td><?php echo number_format($page_views); ?> 次</td>
                    </tr>
                    <tr>
                        <td><strong>文章总数</strong></td>
                        <td><?php echo $post_count; ?> 篇</td>
                    </tr>
                    <tr>
                        <td><strong>文章评论</strong></td>
                        <td><?php echo $comment_count; ?> 条</td>
                    </tr>
                    <tr>
                        <td><strong>友情链接</strong></td>
                        <td><?php echo $bookmarks_count; ?> 个</td>
                    </tr>
                </table>
            </div>
            
            <div class="stats-controls">
                <h2>访问量控制</h2>
                <form method="post" style="margin-bottom: 20px;">
                    <?php wp_nonce_field('site_stats_set'); ?>
                    <input type="hidden" name="action" value="set_views">
                    <p>
                        <label for="page_views">设置访问量：</label>
                        <input type="number" name="page_views" value="<?php echo $page_views; ?>" class="regular-text">
                        <input type="submit" value="设置" class="button button-primary">
                    </p>
                </form>
                
                <form method="post">
                    <?php wp_nonce_field('site_stats_reset'); ?>
                    <input type="hidden" name="action" value="reset_views">
                    <p>
                        <input type="submit" value="重置访问量为0" class="button button-secondary" 
                               onclick="return confirm('确定要重置访问量吗？这将无法恢复！');">
                    </p>
                </form>
                
                <h2>缓存管理</h2>
                <form method="post" style="margin-bottom: 15px;">
                    <?php wp_nonce_field('site_stats_clear_cache'); ?>
                    <input type="hidden" name="action" value="clear_login_cache">
                    <p>
                        <input type="submit" value="清除登录时间缓存" class="button">
                        <small>如果登录时间显示不正确，请清除缓存后重新登录</small>
                    </p>
                </form>
                
                <form method="post">
                    <?php wp_nonce_field('site_stats_clear_css_cache'); ?>
                    <input type="hidden" name="action" value="clear_css_cache">
                    <p>
                        <input type="submit" value="清除CSS样式缓存" class="button">
                        <small>如果样式没有更新，请清除CSS缓存</small>
                    </p>
                </form>
            </div>
        </div>
        
        <div class="stats-info">
            <h3>使用说明</h3>
            <ul>
                <li><strong>时区校正：</strong>如果显示的时间比实际时间早，请设置为正数（如：10.5）</li>
                <li><strong>显示控制：</strong>取消勾选的项目将不会在前台显示</li>
                <li><strong>文章评论：</strong>只统计文章（post类型）的评论，不包括页面和其他类型</li>
                <li><strong>好友留言：</strong>需要选择留言板页面才能统计</li>
                <li><strong>站长登录：</strong>需要选择站长账号才能显示</li>
                <li><strong>访问量：</strong>自动过滤爬虫，同一会话24小时内只计数一次</li>
                <li><strong>样式问题：</strong>如果样式未更新，请清除CSS缓存或按Ctrl+F5强制刷新</li>
            </ul>
        </div>
    </div>
    
    <style>
    .site-stats-admin-page {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin: 20px 0;
    }
    .stats-overview table {
        width: 100%;
        border-collapse: collapse;
    }
    .stats-overview td {
        padding: 10px;
        border-bottom: 1px solid #eee;
    }
    .stats-controls form {
        background: #f9f9f9;
        padding: 15px;
        border-radius: 4px;
        margin-bottom: 15px;
    }
    .stats-info ul {
        list-style: disc;
        margin-left: 20px;
    }
    .stats-info li {
        margin-bottom: 5px;
    }
    @media (max-width: 768px) {
        .site-stats-admin-page {
            grid-template-columns: 1fr;
        }
    }
    </style>
    <?php
}

// 添加仪表板小工具
function site_statistics_dashboard_widget() {
    wp_add_dashboard_widget(
        'site_statistics_dashboard',
        '网站统计概览',
        'site_statistics_dashboard_content'
    );
}
add_action('wp_dashboard_setup', 'site_statistics_dashboard_widget');

function site_statistics_dashboard_content() {
    $page_views = get_option('site_statistics_page_views', 0);
    $post_count = wp_count_posts()->publish;
    
    global $wpdb;
    $comment_count = $wpdb->get_var(
        "SELECT COUNT(*) 
        FROM {$wpdb->comments} c
        INNER JOIN {$wpdb->posts} p ON c.comment_post_ID = p.ID
        WHERE c.comment_approved = '1'
        AND p.post_type = 'post'
        AND p.post_status = 'publish'"
    );
    
    $bookmarks_count = count(get_bookmarks(array('hide_invisible' => 1)));
    
    echo '<div style="padding: 10px;">';
    echo '<p><strong>总访问量：</strong>' . number_format($page_views) . ' 次</p>';
    echo '<p><strong>文章总数：</strong>' . $post_count . ' 篇</p>';
    echo '<p><strong>文章评论：</strong>' . $comment_count . ' 条</p>';
    echo '<p><strong>友链数量：</strong>' . $bookmarks_count . ' 个</p>';
    echo '</div>';
}

// 在插件激活时设置时区相关选项
function site_statistics_activate() {
    // 确保访问量选项存在
    if (false === get_option('site_statistics_page_views')) {
        update_option('site_statistics_page_views', 0);
    }
    
    // 确保CSS版本选项存在
    if (false === get_option('site_statistics_css_version')) {
        update_option('site_statistics_css_version', 0);
    }
}
register_activation_hook(__FILE__, 'site_statistics_activate');

// 添加清除缓存链接到插件列表
function site_statistics_plugin_action_links($links) {
    $settings_link = '<a href="' . admin_url('options-general.php?page=site-statistics') . '">设置</a>';
    $cache_link = '<a href="' . admin_url('options-general.php?page=site-statistics&action=clear_cache') . '">清除缓存</a>';
    array_unshift($links, $cache_link);
    array_unshift($links, $settings_link);
    return $links;
}
add_filter('plugin_action_links_' . plugin_basename(__FILE__), 'site_statistics_plugin_action_links');

/* 高级简约风格 - 网站数据统计小工具 v4.0 */
.site-statistics {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 13px;
    line-height: 1.5;
    color: #333;
    background: #ffffff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #eaeaea;
}

/* 主要统计区域 */
.site-statistics .stat-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px dashed #e0e0e0;
}

.site-statistics .stat-item {
    flex: 1;
    text-align: center;
    padding: 0 10px;
}

.site-statistics .stat-item:first-child {
    text-align: left;
}

.site-statistics .stat-item:last-child {
    text-align: right;
}

.site-statistics .stat-label {
    font-size: 12px;
    color: #666;
    font-weight: 500;
    margin-bottom: 4px;
    display: block;
}

.site-statistics .stat-value {
    font-size: 18px;
    font-weight: 600;
    color: #222;
    margin-bottom: 3px;
    line-height: 1.2;
}

.site-statistics .stat-sub {
    font-size: 11px;
    color: #888;
    font-weight: normal;
}

/* 详细统计行 */
.site-statistics .stat-details {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px dashed #e0e0e0;
}

.site-statistics .stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed #f0f0f0;
}

.site-statistics .stat-row:last-child {
    border-bottom: none;
}

.site-statistics .detail-label {
    color: #555;
    font-size: 13px;
    font-weight: 500;
}

.site-statistics .detail-value {
    color: #222;
    font-weight: 600;
    font-size: 13px;
    font-feature-settings: "tnum";
}

/* 信息区域 */
.site-statistics .stat-info {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px dashed #e0e0e0;
}

.site-statistics .info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 0;
    border-bottom: 1px dashed #f0f0f0;
}

.site-statistics .info-row:last-child {
    border-bottom: none;
}

.site-statistics .info-label {
    color: #555;
    font-size: 13px;
    font-weight: 500;
}

.site-statistics .info-value {
    color: #222;
    font-weight: 600;
    font-size: 13px;
    text-align: right;
    font-feature-settings: "tnum";
}

/* 底部区域 */
.site-statistics .stat-footer {
    padding-top: 15px;
    text-align: center;
}

.site-statistics .footer-label {
    font-size: 11px;
    color: #777;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    font-weight: 600;
}

.site-statistics .footer-time {
    font-family: 'SF Mono', Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
    font-size: 12px;
    color: #444;
    background: #f9f9f9;
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #eaeaea;
    line-height: 1.4;
    font-weight: 500;
    font-feature-settings: "tnum";
}

/* 短码样式 */
.site-statistics-shortcode {
    max-width: 350px;
    margin: 0 auto;
}

.site-statistics-shortcode h3 {
    text-align: center;
    color: #222;
    margin-bottom: 18px;
    font-size: 16px;
    font-weight: 600;
    padding-bottom: 10px;
    border-bottom: 1px solid #eaeaea;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .site-statistics {
        padding: 16px;
        font-size: 12px;
    }
    
    .site-statistics .stat-main {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .site-statistics .stat-item {
        text-align: left !important;
        padding: 0;
        width: 100%;
    }
    
    .site-statistics .stat-item:first-child,
    .site-statistics .stat-item:last-child {
        text-align: left !important;
    }
    
    .site-statistics .stat-value {
        font-size: 16px;
    }
    
    .site-statistics .footer-time {
        font-size: 11px;
        padding: 6px 10px;
    }
    
    .site-statistics-shortcode {
        max-width: 100%;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .site-statistics {
        background: #1a1a1a;
        border-color: #333;
        color: #e0e0e0;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }
    
    .site-statistics .stat-main,
    .site-statistics .stat-details,
    .site-statistics .stat-info {
        border-color: #333;
    }
    
    .site-statistics .stat-row,
    .site-statistics .info-row {
        border-color: #2a2a2a;
    }
    
    .site-statistics .stat-label,
    .site-statistics .detail-label,
    .site-statistics .info-label {
        color: #aaa;
    }
    
    .site-statistics .stat-value,
    .site-statistics .detail-value,
    .site-statistics .info-value {
        color: #fff;
    }
    
    .site-statistics .stat-sub {
        color: #888;
    }
    
    .site-statistics .footer-label {
        color: #999;
    }
    
    .site-statistics .footer-time {
        background: #222;
        border-color: #333;
        color: #ccc;
    }
    
    .site-statistics-shortcode h3 {
        color: #fff;
        border-color: #444;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.site-statistics {
    animation: fadeInUp 0.3s ease-out;
}

/* 确保无渐变背景 */
.site-statistics .stat-item,
.site-statistics .footer-time {
    background: transparent !important;
    background-image: none !important;
}

/* 清除所有可能继承的渐变样式 */
.site-statistics * {
    background-image: none !important;
}/* 高级简约风格 - 网站数据统计小工具 v4.0 */
.site-statistics {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 13px;
    line-height: 1.5;
    color: #333;
    background: #ffffff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #eaeaea;
}

/* 主要统计区域 */
.site-statistics .stat-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px dashed #e0e0e0;
}

.site-statistics .stat-item {
    flex: 1;
    text-align: center;
    padding: 0 10px;
}

.site-statistics .stat-item:first-child {
    text-align: left;
}

.site-statistics .stat-item:last-child {
    text-align: right;
}

.site-statistics .stat-label {
    font-size: 12px;
    color: #666;
    font-weight: 500;
    margin-bottom: 4px;
    display: block;
}

.site-statistics .stat-value {
    font-size: 18px;
    font-weight: 600;
    color: #222;
    margin-bottom: 3px;
    line-height: 1.2;
}

.site-statistics .stat-sub {
    font-size: 11px;
    color: #888;
    font-weight: normal;
}

/* 详细统计行 */
.site-statistics .stat-details {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px dashed #e0e0e0;
}

.site-statistics .stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed #f0f0f0;
}

.site-statistics .stat-row:last-child {
    border-bottom: none;
}

.site-statistics .detail-label {
    color: #555;
    font-size: 13px;
    font-weight: 500;
}

.site-statistics .detail-value {
    color: #222;
    font-weight: 600;
    font-size: 13px;
    font-feature-settings: "tnum";
}

/* 信息区域 */
.site-statistics .stat-info {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px dashed #e0e0e0;
}

.site-statistics .info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 0;
    border-bottom: 1px dashed #f0f0f0;
}

.site-statistics .info-row:last-child {
    border-bottom: none;
}

.site-statistics .info-label {
    color: #555;
    font-size: 13px;
    font-weight: 500;
}

.site-statistics .info-value {
    color: #222;
    font-weight: 600;
    font-size: 13px;
    text-align: right;
    font-feature-settings: "tnum";
}

/* 底部区域 */
.site-statistics .stat-footer {
    padding-top: 15px;
    text-align: center;
}

.site-statistics .footer-label {
    font-size: 11px;
    color: #777;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    font-weight: 600;
}

.site-statistics .footer-time {
    font-family: 'SF Mono', Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
    font-size: 12px;
    color: #444;
    background: #f9f9f9;
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #eaeaea;
    line-height: 1.4;
    font-weight: 500;
    font-feature-settings: "tnum";
}

/* 短码样式 */
.site-statistics-shortcode {
    max-width: 350px;
    margin: 0 auto;
}

.site-statistics-shortcode h3 {
    text-align: center;
    color: #222;
    margin-bottom: 18px;
    font-size: 16px;
    font-weight: 600;
    padding-bottom: 10px;
    border-bottom: 1px solid #eaeaea;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .site-statistics {
        padding: 16px;
        font-size: 12px;
    }
    
    .site-statistics .stat-main {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .site-statistics .stat-item {
        text-align: left !important;
        padding: 0;
        width: 100%;
    }
    
    .site-statistics .stat-item:first-child,
    .site-statistics .stat-item:last-child {
        text-align: left !important;
    }
    
    .site-statistics .stat-value {
        font-size: 16px;
    }
    
    .site-statistics .footer-time {
        font-size: 11px;
        padding: 6px 10px;
    }
    
    .site-statistics-shortcode {
        max-width: 100%;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .site-statistics {
        background: #1a1a1a;
        border-color: #333;
        color: #e0e0e0;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }
    
    .site-statistics .stat-main,
    .site-statistics .stat-details,
    .site-statistics .stat-info {
        border-color: #333;
    }
    
    .site-statistics .stat-row,
    .site-statistics .info-row {
        border-color: #2a2a2a;
    }
    
    .site-statistics .stat-label,
    .site-statistics .detail-label,
    .site-statistics .info-label {
        color: #aaa;
    }
    
    .site-statistics .stat-value,
    .site-statistics .detail-value,
    .site-statistics .info-value {
        color: #fff;
    }
    
    .site-statistics .stat-sub {
        color: #888;
    }
    
    .site-statistics .footer-label {
        color: #999;
    }
    
    .site-statistics .footer-time {
        background: #222;
        border-color: #333;
        color: #ccc;
    }
    
    .site-statistics-shortcode h3 {
        color: #fff;
        border-color: #444;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.site-statistics {
    animation: fadeInUp 0.3s ease-out;
}

/* 确保无渐变背景 */
.site-statistics .stat-item,
.site-statistics .footer-time {
    background: transparent !important;
    background-image: none !important;
}

/* 清除所有可能继承的渐变样式 */
.site-statistics * {
    background-image: none !important;
}