diff --git a/internal/service/bangumi_calendar.go b/internal/service/bangumi_calendar.go
new file mode 100644
index 0000000..192e70d
--- /dev/null
+++ b/internal/service/bangumi_calendar.go
@@ -0,0 +1,77 @@
+// Package service — Bangumi discovery calendar.
+package service
+
+import (
+	"context"
+	"strconv"
+	"strings"
+)
+
+// Calendar returns Bangumi's public on-air anime calendar as a recommendation
+// rail. It needs no token, but NewBangumiProvider still attaches one when set.
+func (b *BangumiProvider) Calendar(ctx context.Context) ([]ExternalMediaResult, error) {
+	type subject struct {
+		ID      int    `json:"id"`
+		Name    string `json:"name"`
+		NameCN  string `json:"name_cn"`
+		Summary string `json:"summary"`
+		AirDate string `json:"air_date"`
+		Images  struct {
+			Large  string `json:"large"`
+			Common string `json:"common"`
+		} `json:"images"`
+		Rating struct {
+			Score float32 `json:"score"`
+		} `json:"rating"`
+	}
+	type day struct {
+		Items []subject `json:"items"`
+	}
+	var days []day
+	if err := b.getJSON(ctx, b.base+"/calendar", &days); err != nil {
+		return nil, err
+	}
+	out := make([]ExternalMediaResult, 0, 24)
+	seen := map[int]struct{}{}
+	for _, day := range days {
+		for _, item := range day.Items {
+			if _, ok := seen[item.ID]; ok {
+				continue
+			}
+			seen[item.ID] = struct{}{}
+			title := strings.TrimSpace(item.NameCN)
+			if title == "" {
+				title = strings.TrimSpace(item.Name)
+			}
+			if title == "" {
+				continue
+			}
+			poster := item.Images.Large
+			if poster == "" {
+				poster = item.Images.Common
+			}
+			poster = normalizeBangumiImageURL(poster)
+			year := 0
+			if len(item.AirDate) >= 4 {
+				year, _ = strconv.Atoi(item.AirDate[:4])
+			}
+			out = append(out, ExternalMediaResult{
+				Source:           "bangumi",
+				MediaType:        "anime",
+				Title:            title,
+				OriginalName:     item.Name,
+				Overview:         item.Summary,
+				PosterURL:        poster,
+				Year:             year,
+				Rating:           item.Rating.Score,
+				BangumiID:        item.ID,
+				SubscribeKeyword: buildSubscribeKeyword(title, year),
+				SubscribeAliases: buildSubscribeAliases(title, item.Name, year),
+			})
+			if len(out) >= 24 {
+				return out, nil
+			}
+		}
+	}
+	return out, nil
+}
diff --git a/internal/service/discover.go b/internal/service/discover.go
index 4a266c9..957276d 100644
--- a/internal/service/discover.go
+++ b/internal/service/discover.go
@@ -198,150 +198,3 @@ func tmdbDiscoverPath(key string) string {
 		return ""
 	}
 }
-
-// Discover returns public Douban movie/TV rails. Douban does not require a
-// formal API key here; these are the same public web endpoints the site uses.
-func (d *DoubanProvider) Discover(ctx context.Context, key string, pages ...int) ([]ExternalMediaResult, error) {
-	doubanType := "movie"
-	tag := "热门"
-	switch key {
-	case "douban_hot_movie":
-		doubanType = "movie"
-		tag = "热门"
-	case "douban_top_movie":
-		doubanType = "movie"
-		tag = "高分"
-	case "douban_hot_tv":
-		doubanType = "tv"
-		tag = "热门"
-	default:
-		return []ExternalMediaResult{}, nil
-	}
-	q := url.Values{}
-	q.Set("type", doubanType)
-	q.Set("tag", tag)
-	q.Set("sort", "recommend")
-	q.Set("page_limit", "24")
-	pageNumber := 1
-	if len(pages) > 0 && pages[0] > 0 {
-		pageNumber = pages[0]
-	}
-	q.Set("page_start", strconv.Itoa((pageNumber-1)*24))
-	u := "https://movie.douban.com/j/search_subjects?" + q.Encode()
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u, nil)
-	if err != nil {
-		return nil, err
-	}
-	d.setHeaders(req)
-	resp, err := d.client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-	if resp.StatusCode >= 400 {
-		return nil, fmt.Errorf("douban discover: %d", resp.StatusCode)
-	}
-	var page struct {
-		Subjects []struct {
-			ID    string `json:"id"`
-			Title string `json:"title"`
-			Rate  string `json:"rate"`
-			Cover string `json:"cover"`
-			URL   string `json:"url"`
-		} `json:"subjects"`
-	}
-	if err := json.NewDecoder(resp.Body).Decode(&page); err != nil {
-		return nil, err
-	}
-	out := make([]ExternalMediaResult, 0, len(page.Subjects))
-	mediaType := "movie"
-	if doubanType == "tv" {
-		mediaType = "tv"
-	}
-	for _, subject := range page.Subjects {
-		if strings.TrimSpace(subject.Title) == "" {
-			continue
-		}
-		rating, _ := strconv.ParseFloat(subject.Rate, 32)
-		out = append(out, ExternalMediaResult{
-			Source:           "douban",
-			MediaType:        mediaType,
-			Title:            subject.Title,
-			PosterURL:        subject.Cover,
-			Rating:           float32(rating),
-			DoubanID:         subject.ID,
-			SubscribeKeyword: subject.Title,
-			SubscribeAliases: buildSubscribeAliases(subject.Title, "", 0),
-		})
-	}
-	return out, nil
-}
-
-// Calendar returns Bangumi's public on-air anime calendar as a recommendation
-// rail. It needs no token, but NewBangumiProvider still attaches one when set.
-func (b *BangumiProvider) Calendar(ctx context.Context) ([]ExternalMediaResult, error) {
-	type subject struct {
-		ID      int    `json:"id"`
-		Name    string `json:"name"`
-		NameCN  string `json:"name_cn"`
-		Summary string `json:"summary"`
-		AirDate string `json:"air_date"`
-		Images  struct {
-			Large  string `json:"large"`
-			Common string `json:"common"`
-		} `json:"images"`
-		Rating struct {
-			Score float32 `json:"score"`
-		} `json:"rating"`
-	}
-	type day struct {
-		Items []subject `json:"items"`
-	}
-	var days []day
-	if err := b.getJSON(ctx, b.base+"/calendar", &days); err != nil {
-		return nil, err
-	}
-	out := make([]ExternalMediaResult, 0, 24)
-	seen := map[int]struct{}{}
-	for _, day := range days {
-		for _, item := range day.Items {
-			if _, ok := seen[item.ID]; ok {
-				continue
-			}
-			seen[item.ID] = struct{}{}
-			title := strings.TrimSpace(item.NameCN)
-			if title == "" {
-				title = strings.TrimSpace(item.Name)
-			}
-			if title == "" {
-				continue
-			}
-			poster := item.Images.Large
-			if poster == "" {
-				poster = item.Images.Common
-			}
-			poster = normalizeBangumiImageURL(poster)
-			year := 0
-			if len(item.AirDate) >= 4 {
-				year, _ = strconv.Atoi(item.AirDate[:4])
-			}
-			out = append(out, ExternalMediaResult{
-				Source:           "bangumi",
-				MediaType:        "anime",
-				Title:            title,
-				OriginalName:     item.Name,
-				Overview:         item.Summary,
-				PosterURL:        poster,
-				Year:             year,
-				Rating:           item.Rating.Score,
-				BangumiID:        item.ID,
-				SubscribeKeyword: buildSubscribeKeyword(title, year),
-				SubscribeAliases: buildSubscribeAliases(title, item.Name, year),
-			})
-			if len(out) >= 24 {
-				return out, nil
-			}
-		}
-	}
-	return out, nil
-}
diff --git a/internal/service/douban_discover.go b/internal/service/douban_discover.go
new file mode 100644
index 0000000..f938762
--- /dev/null
+++ b/internal/service/douban_discover.go
@@ -0,0 +1,90 @@
+// Package service — Douban discovery rails.
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+)
+
+// Discover returns public Douban movie/TV rails. Douban does not require a
+// formal API key here; these are the same public web endpoints the site uses.
+func (d *DoubanProvider) Discover(ctx context.Context, key string, pages ...int) ([]ExternalMediaResult, error) {
+	doubanType := "movie"
+	tag := "热门"
+	switch key {
+	case "douban_hot_movie":
+		doubanType = "movie"
+		tag = "热门"
+	case "douban_top_movie":
+		doubanType = "movie"
+		tag = "高分"
+	case "douban_hot_tv":
+		doubanType = "tv"
+		tag = "热门"
+	default:
+		return []ExternalMediaResult{}, nil
+	}
+	q := url.Values{}
+	q.Set("type", doubanType)
+	q.Set("tag", tag)
+	q.Set("sort", "recommend")
+	q.Set("page_limit", "24")
+	pageNumber := 1
+	if len(pages) > 0 && pages[0] > 0 {
+		pageNumber = pages[0]
+	}
+	q.Set("page_start", strconv.Itoa((pageNumber-1)*24))
+	u := "https://movie.douban.com/j/search_subjects?" + q.Encode()
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u, nil)
+	if err != nil {
+		return nil, err
+	}
+	d.setHeaders(req)
+	resp, err := d.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 400 {
+		return nil, fmt.Errorf("douban discover: %d", resp.StatusCode)
+	}
+	var page struct {
+		Subjects []struct {
+			ID    string `json:"id"`
+			Title string `json:"title"`
+			Rate  string `json:"rate"`
+			Cover string `json:"cover"`
+			URL   string `json:"url"`
+		} `json:"subjects"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&page); err != nil {
+		return nil, err
+	}
+	out := make([]ExternalMediaResult, 0, len(page.Subjects))
+	mediaType := "movie"
+	if doubanType == "tv" {
+		mediaType = "tv"
+	}
+	for _, subject := range page.Subjects {
+		if strings.TrimSpace(subject.Title) == "" {
+			continue
+		}
+		rating, _ := strconv.ParseFloat(subject.Rate, 32)
+		out = append(out, ExternalMediaResult{
+			Source:           "douban",
+			MediaType:        mediaType,
+			Title:            subject.Title,
+			PosterURL:        subject.Cover,
+			Rating:           float32(rating),
+			DoubanID:         subject.ID,
+			SubscribeKeyword: subject.Title,
+			SubscribeAliases: buildSubscribeAliases(subject.Title, "", 0),
+		})
+	}
+	return out, nil
+}