diff --git a/config.example.yaml b/config.example.yaml
index a1cef63..71ec177 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -19,7 +19,7 @@ api:
 
 cron:
   enabled: true
-  daily_spec: "0 10 * * *"
+  daily_spec: "20 8-23/4 * * *"
 
 retention:
   days: 0
diff --git a/internal/bootstrap/bootstrap.go b/internal/bootstrap/bootstrap.go
index 78449eb..5729ae7 100644
--- a/internal/bootstrap/bootstrap.go
+++ b/internal/bootstrap/bootstrap.go
@@ -36,6 +36,20 @@ func Init(webFS embed.FS, configPath string) *gin.Engine {
 	// 2. 初始化日志
 	util.InitLogger(cfg.Log)
 
+	// 以 debug 级别输出配置加载详情和环境变量覆盖情况
+	util.Logger.Debug("Configuration loading details",
+		zap.String("config_file", config.GetRawViper().ConfigFileUsed()),
+	)
+	envOverrides := config.GetEnvOverrides()
+	if len(envOverrides) > 0 {
+		for _, override := range envOverrides {
+			util.Logger.Debug("Environment variable override applied", zap.String("detail", override))
+		}
+	} else {
+		util.Logger.Debug("No environment variable overrides detected")
+	}
+	util.Logger.Debug("Full effective configuration:\n" + config.GetFormattedSettings())
+
 	// 输出配置信息
 	util.Logger.Info("Application configuration loaded")
 	util.Logger.Info("├─ Config file", zap.String("path", config.GetRawViper().ConfigFileUsed()))
diff --git a/internal/config/config.go b/internal/config/config.go
index 408dc23..fa75254 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -3,6 +3,7 @@ package config
 import (
 	"fmt"
 	"os"
+	"sort"
 	"strings"
 	"sync"
 	"time"
@@ -156,7 +157,7 @@ func Init(configPath string) error {
 	v.SetDefault("log.db_log_level", "info")
 	v.SetDefault("api.mode", "local")
 	v.SetDefault("cron.enabled", true)
-	v.SetDefault("cron.daily_spec", "0 10 * * *")
+	v.SetDefault("cron.daily_spec", "20 8-23/4 * * *")
 	v.SetDefault("retention.days", 0)
 	v.SetDefault("db.type", "sqlite")
 	v.SetDefault("db.dsn", "data/bing_paper.db")
@@ -254,6 +255,38 @@ func GetRawViper() *viper.Viper {
 	return v
 }
 
+// GetAllSettings 返回所有生效配置项
+func GetAllSettings() map[string]interface{} {
+	return v.AllSettings()
+}
+
+// GetFormattedSettings 以 key: value 形式返回所有配置项的字符串
+func GetFormattedSettings() string {
+	keys := v.AllKeys()
+	sort.Strings(keys)
+	var sb strings.Builder
+	for _, k := range keys {
+		sb.WriteString(fmt.Sprintf("%s: %v\n", k, v.Get(k)))
+	}
+	return sb.String()
+}
+
+// GetEnvOverrides 返回环境变量覆盖详情（已排序）
+func GetEnvOverrides() []string {
+	var overrides []string
+	keys := v.AllKeys()
+	sort.Strings(keys)
+	for _, key := range keys {
+		// 根据 viper 的配置生成对应的环境变量名
+		// Prefix: BINGPAPER, KeyReplacer: . -> _
+		envKey := strings.ToUpper(fmt.Sprintf("BINGPAPER_%s", strings.ReplaceAll(key, ".", "_")))
+		if val, ok := os.LookupEnv(envKey); ok {
+			overrides = append(overrides, fmt.Sprintf("%s: %s=%s", key, envKey, val))
+		}
+	}
+	return overrides
+}
+
 func GetTokenTTL() time.Duration {
 	ttl, err := time.ParseDuration(GetConfig().Token.DefaultTTL)
 	if err != nil {
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
index 943057a..065fafa 100644
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -1,6 +1,9 @@
 package config
 
 import (
+	"fmt"
+	"os"
+	"strings"
 	"testing"
 )
 
@@ -19,3 +22,46 @@ func TestDefaultConfig(t *testing.T) {
 		t.Errorf("Expected DB type sqlite, got %s", cfg.DB.Type)
 	}
 }
+
+func TestDebugFunctions(t *testing.T) {
+	// 设置一个环境变量
+	os.Setenv("BINGPAPER_SERVER_PORT", "9999")
+	defer os.Unsetenv("BINGPAPER_SERVER_PORT")
+
+	err := Init("")
+	if err != nil {
+		t.Fatalf("Failed to init config: %v", err)
+	}
+
+	settings := GetAllSettings()
+	serverCfg, ok := settings["server"].(map[string]interface{})
+	if !ok {
+		t.Fatalf("Expected server config map, got %v", settings["server"])
+	}
+
+	// Viper numbers in AllSettings are often int
+	portValue := serverCfg["port"]
+	// 允许不同的数字类型，因为 viper 内部实现可能变化
+	portStr := fmt.Sprintf("%v", portValue)
+	if portStr != "9999" {
+		t.Errorf("Expected port 9999 in settings, got %v (%T)", portValue, portValue)
+	}
+
+	overrides := GetEnvOverrides()
+	found := false
+	for _, o := range overrides {
+		if strings.Contains(o, "server.port") && strings.Contains(o, "9999") {
+			found = true
+			break
+		}
+	}
+	if !found {
+		t.Errorf("Expected server.port override in %v", overrides)
+	}
+
+	// 验证格式化输出
+	formatted := GetFormattedSettings()
+	if !strings.Contains(formatted, "server.port: 9999") {
+		t.Errorf("Expected formatted settings to contain server.port: 9999, got %s", formatted)
+	}
+}