diff --git a/server/config/http.go b/server/config/http.go
index d6bd7d52..3ae0dc1d 100644
--- a/server/config/http.go
+++ b/server/config/http.go
@@ -47,10 +47,10 @@ type (
 
 		tlsConfig *tls.Config
 
-		ReadTimeout       duration `yaml:"readTimeout,omitempty" json:"readTimeout,omitempty" xml:"readTimeout,attr,omitempty"`
-		WriteTimeout      duration `yaml:"writeTimeout,omitempty" json:"writeTimeout,omitempty" xml:"writeTimeout,attr,omitempty"`
-		IdleTimeout       duration `yaml:"idleTimeout,omitempty" json:"idleTimeout,omitempty" xml:"idleTimeout,attr,omitempty"`
-		ReadHeaderTimeout duration `yaml:"readHeaderTimeout,omitempty" json:"readHeaderTimeout,omitempty" xml:"readHeaderTimeout,attr,omitempty"`
+		ReadTimeout       Duration `yaml:"readTimeout,omitempty" json:"readTimeout,omitempty" xml:"readTimeout,attr,omitempty"`
+		WriteTimeout      Duration `yaml:"writeTimeout,omitempty" json:"writeTimeout,omitempty" xml:"writeTimeout,attr,omitempty"`
+		IdleTimeout       Duration `yaml:"idleTimeout,omitempty" json:"idleTimeout,omitempty" xml:"idleTimeout,attr,omitempty"`
+		ReadHeaderTimeout Duration `yaml:"readHeaderTimeout,omitempty" json:"readHeaderTimeout,omitempty" xml:"readHeaderTimeout,attr,omitempty"`
 		MaxHeaderBytes    int      `yaml:"maxHeaderBytes,omitempty" json:"maxHeaderBytes,omitempty" xml:"maxHeaderBytes,attr,omitempty"`
 
 		// Recovery 拦截 panic 时反馈给客户端的状态码
@@ -90,8 +90,10 @@ type (
 		httpServer *http.Server
 	}
 
-	// 表示时间段，等同于 [time.Duration]
-	duration time.Duration // 封装 [time.Duration] 以实现对 JSON、XML 和 YAML 的解析
+	// Duration 表示时间段
+	//
+	// 封装 [time.Duration] 以实现对 JSON、XML 和 YAML 的解析
+	Duration time.Duration
 
 	headerConfig struct {
 		// 报头名称
@@ -168,7 +170,7 @@ var (
 		return err == nil || errors.Is(err, fs.ErrExist)
 	}, locales.NotFound)
 
-	durShouldGreatThan0 = filter.V(func(v duration) bool { return v >= 0 }, locales.ShouldGreatThan(0))
+	durShouldGreatThan0 = filter.V(func(v Duration) bool { return v >= 0 }, locales.ShouldGreatThan(0))
 )
 
 func (cert *certificateConfig) sanitize() *web.FieldError {
@@ -311,14 +313,15 @@ func (l *acmeConfig) sanitize() *web.FieldError {
 	)
 }
 
-func (d duration) Duration() time.Duration { return time.Duration(d) }
+// Duration 转换为标准库的 [time.Duration]
+func (d Duration) Duration() time.Duration { return time.Duration(d) }
 
-func (d duration) MarshalText() ([]byte, error) { return []byte(time.Duration(d).String()), nil }
+func (d Duration) MarshalText() ([]byte, error) { return []byte(time.Duration(d).String()), nil }
 
-func (d *duration) UnmarshalText(b []byte) error {
+func (d *Duration) UnmarshalText(b []byte) error {
 	v, err := time.ParseDuration(string(b))
 	if err == nil {
-		*d = duration(v)
+		*d = Duration(v)
 	}
 	return err
 }
diff --git a/server/config/http_test.go b/server/config/http_test.go
index 80731ccd..6662133a 100644
--- a/server/config/http_test.go
+++ b/server/config/http_test.go
@@ -106,12 +106,12 @@ func TestACME_sanitize(t *testing.T) {
 var (
 	dur time.Duration
 
-	_ encoding.TextMarshaler   = duration(1)
-	_ encoding.TextUnmarshaler = (*duration)(&dur)
+	_ encoding.TextMarshaler   = Duration(1)
+	_ encoding.TextUnmarshaler = (*Duration)(&dur)
 )
 
 type testDuration struct {
-	Duration duration `xml:"dur" json:"dur" yaml:"dur"`
+	Duration Duration `xml:"dur" json:"dur" yaml:"dur"`
 }
 
 func TestDuration_Duration(t *testing.T) {
@@ -119,14 +119,14 @@ func TestDuration_Duration(t *testing.T) {
 
 	dur := time.Second * 2
 
-	a.Equal(dur, duration(dur).Duration())
+	a.Equal(dur, Duration(dur).Duration())
 }
 
 func TestDuration_YAML(t *testing.T) {
 	a := assert.New(t, false)
 
 	m := &testDuration{
-		Duration: duration(time.Nanosecond * 5),
+		Duration: Duration(time.Nanosecond * 5),
 	}
 
 	bs, err := yaml.Marshal(m)
@@ -143,7 +143,7 @@ func TestDuration_XML(t *testing.T) {
 	a := assert.New(t, false)
 
 	m := &testDuration{
-		Duration: duration(time.Nanosecond * 5),
+		Duration: Duration(time.Nanosecond * 5),
 	}
 
 	bs, err := xml.MarshalIndent(m, "", "  ")
@@ -160,10 +160,10 @@ func TestDuration_XMLAttr(t *testing.T) {
 	a := assert.New(t, false)
 
 	type obj struct {
-		D duration `xml:"d,attr"`
+		D Duration `xml:"d,attr"`
 	}
 	m := &obj{
-		D: duration(time.Nanosecond * 5),
+		D: Duration(time.Nanosecond * 5),
 	}
 
 	bs, err := xml.MarshalIndent(m, "", "  ")
@@ -177,7 +177,7 @@ func TestDuration_JSON(t *testing.T) {
 	a := assert.New(t, false)
 
 	m := &testDuration{
-		Duration: duration(time.Nanosecond * 5),
+		Duration: Duration(time.Nanosecond * 5),
 	}
 
 	bs, err := json.Marshal(m)