优化 Bing API 请求逻辑，增加语言和地区识别支持，统一传递上下文并增强 HTTP 请求头配置

提升日志级别并增加详细日志信息，优化 Bing API 调用与数据库操作可见性
优化每日图片查询逻辑，使用数据库查询替代循环调用获取多地区图片
2026-03-07 16:49:32 +08:00 · 2026-01-31 00:22:24 +08:00 · 2026-01-31 00:09:55 +08:00 · 2026-01-30 23:40:07 +08:00 · 2026-01-30 23:02:59 +08:00 · 2026-01-30 16:44:26 +08:00
25 changed files with 1343 additions and 398 deletions
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -1,7 +1,6 @@
 server:
  port: 8080
  base_url: ""
-
 log:
  level: info
  filename: data/logs/app.log
@@ -13,24 +12,20 @@ log:
  log_console: true
  show_db_log: false
  db_log_level: info
-
 api:
-  mode: local # local | redirect
-  enable_mkt_fallback: true # 当请求的地区不存在时，是否回退到默认地区
-
+  mode: redirect
+  enable_mkt_fallback: false
+  enable_on_demand_fetch: false
 cron:
  enabled: true
-  daily_spec: "20 8-23/4 * * *"
-
+  daily_spec: 20 8-23/4 * * *
 retention:
  days: 0
-
 db:
-  type: sqlite # sqlite | mysql | postgres
+  type: sqlite
  dsn: data/bing_paper.db
-
 storage:
-  type: local # local | s3 | webdav
+  type: local
  local:
    root: data/picture
  s3:
@@ -46,15 +41,28 @@ storage:
    username: ""
    password: ""
    public_url_prefix: ""
-
 admin:
-  password_bcrypt: "$2a$10$fYHPeWHmwObephJvtlyH1O8DIgaLk5TINbi9BOezo2M8cSjmJchka" # 默认密码: admin123
-
+  password_bcrypt: $2a$10$fYHPeWHmwObephJvtlyH1O8DIgaLk5TINbi9BOezo2M8cSjmJchka
 token:
  default_ttl: 168h
-
 feature:
  write_daily_files: true
-
 web:
  path: web
+fetcher:
+  regions:
+    - zh-CN
+    - en-US
+    - ja-JP
+    - en-AU
+    - en-GB
+    - de-DE
+    - en-NZ
+    - en-CA
+    - fr-FR
+    - it-IT
+    - es-ES
+    - pt-BR
+    - ko-KR
+    - en-IN
+    - ru-RU
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -14,23 +14,4 @@ services:
    environment:
      - TZ=${TZ:-Asia/Shanghai}
      - BINGPAPER_SERVER_PORT=${BINGPAPER_SERVER_PORT:-8080}
-      - BINGPAPER_LOG_LEVEL=${BINGPAPER_LOG_LEVEL:-info}
-      - BINGPAPER_API_MODE=${BINGPAPER_API_MODE:-local}
-      - BINGPAPER_CRON_ENABLED=${BINGPAPER_CRON_ENABLED:-true}
-      - BINGPAPER_DB_TYPE=${BINGPAPER_DB_TYPE:-sqlite}
-      - BINGPAPER_DB_DSN=${BINGPAPER_DB_DSN:-data/bing_paper.db}
-      - BINGPAPER_STORAGE_TYPE=${BINGPAPER_STORAGE_TYPE:-local}
-      - BINGPAPER_STORAGE_LOCAL_ROOT=${BINGPAPER_STORAGE_LOCAL_ROOT:-data/picture}
-      - BINGPAPER_RETENTION_DAYS=${BINGPAPER_RETENTION_DAYS:-30}
-      # S3 配置 (可选)
-      # - BINGPAPER_STORAGE_S3_ENDPOINT=${BINGPAPER_STORAGE_S3_ENDPOINT:-}
-      # - BINGPAPER_STORAGE_S3_REGION=${BINGPAPER_STORAGE_S3_REGION:-}
-      # - BINGPAPER_STORAGE_S3_BUCKET=${BINGPAPER_STORAGE_S3_BUCKET:-}
-      # - BINGPAPER_STORAGE_S3_ACCESS_KEY=${BINGPAPER_STORAGE_S3_ACCESS_KEY:-}
-      # - BINGPAPER_STORAGE_S3_SECRET_KEY=${BINGPAPER_STORAGE_S3_SECRET_KEY:-}
-      # - BINGPAPER_STORAGE_S3_PUBLIC_URL_PREFIX=${BINGPAPER_STORAGE_S3_PUBLIC_URL_PREFIX:-}
-      # WebDAV 配置 (可选)
-      # - BINGPAPER_STORAGE_WEBDAV_URL=${BINGPAPER_STORAGE_WEBDAV_URL:-}
-      # - BINGPAPER_STORAGE_WEBDAV_USERNAME=${BINGPAPER_STORAGE_WEBDAV_USERNAME:-}
-      # - BINGPAPER_STORAGE_WEBDAV_PASSWORD=${BINGPAPER_STORAGE_WEBDAV_PASSWORD:-}
-      # - BINGPAPER_STORAGE_WEBDAV_PUBLIC_URL_PREFIX=${BINGPAPER_STORAGE_WEBDAV_PUBLIC_URL_PREFIX:-}
+      - BINGPAPER_LOG_LEVEL=${BINGPAPER_LOG_LEVEL:-info}
--- a/docs/docs.go
+++ b/docs/docs.go
@@ -440,6 +440,24 @@ const docTemplate = `{
                        "schema": {
                            "type": "file"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -475,6 +493,24 @@ const docTemplate = `{
                        "schema": {
                            "$ref": "#/definitions/handlers.ImageMetaResp"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -517,6 +553,24 @@ const docTemplate = `{
                        "schema": {
                            "type": "file"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -545,6 +599,24 @@ const docTemplate = `{
                        "schema": {
                            "$ref": "#/definitions/handlers.ImageMetaResp"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -587,6 +659,24 @@ const docTemplate = `{
                        "schema": {
                            "type": "file"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -615,6 +705,24 @@ const docTemplate = `{
                        "schema": {
                            "$ref": "#/definitions/handlers.ImageMetaResp"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -675,6 +783,29 @@ const docTemplate = `{
                }
            }
        },
+        "/images/global/today": {
+            "get": {
+                "description": "获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "image"
+                ],
+                "summary": "获取所有地区的今日图片列表",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/handlers.ImageMetaResp"
+                            }
+                        }
+                    }
+                }
+            }
+        },
        "/regions": {
            "get": {
                "description": "返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。",
@@ -707,6 +838,10 @@ const docTemplate = `{
                    "description": "当请求的地区不存在时，是否回退到默认地区",
                    "type": "boolean"
                },
+                "enableOnDemandFetch": {
+                    "description": "是否启用按需抓取",
+                    "type": "boolean"
+                },
                "mode": {
                    "description": "local | redirect",
                    "type": "string"
--- a/docs/swagger.json
+++ b/docs/swagger.json
@@ -434,6 +434,24 @@
                        "schema": {
                            "type": "file"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -469,6 +487,24 @@
                        "schema": {
                            "$ref": "#/definitions/handlers.ImageMetaResp"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -511,6 +547,24 @@
                        "schema": {
                            "type": "file"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -539,6 +593,24 @@
                        "schema": {
                            "$ref": "#/definitions/handlers.ImageMetaResp"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -581,6 +653,24 @@
                        "schema": {
                            "type": "file"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -609,6 +699,24 @@
                        "schema": {
                            "$ref": "#/definitions/handlers.ImageMetaResp"
                        }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                    }
                }
            }
@@ -669,6 +777,29 @@
                }
            }
        },
+        "/images/global/today": {
+            "get": {
+                "description": "获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "image"
+                ],
+                "summary": "获取所有地区的今日图片列表",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/handlers.ImageMetaResp"
+                            }
+                        }
+                    }
+                }
+            }
+        },
        "/regions": {
            "get": {
                "description": "返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。",
@@ -701,6 +832,10 @@
                    "description": "当请求的地区不存在时，是否回退到默认地区",
                    "type": "boolean"
                },
+                "enableOnDemandFetch": {
+                    "description": "是否启用按需抓取",
+                    "type": "boolean"
+                },
                "mode": {
                    "description": "local | redirect",
                    "type": "string"
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@@ -5,6 +5,9 @@ definitions:
      enableMktFallback:
        description: 当请求的地区不存在时，是否回退到默认地区
        type: boolean
+      enableOnDemandFetch:
+        description: 是否启用按需抓取
+        type: boolean
      mode:
        description: local | redirect
        type: string
@@ -543,6 +546,18 @@ paths:
          description: OK
          schema:
            type: file
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
      summary: 获取指定日期图片
      tags:
      - image
@@ -566,6 +581,18 @@ paths:
          description: OK
          schema:
            $ref: '#/definitions/handlers.ImageMetaResp'
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
      summary: 获取指定日期图片元数据
      tags:
      - image
@@ -594,6 +621,18 @@ paths:
          description: OK
          schema:
            type: file
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
      summary: 获取随机图片
      tags:
      - image
@@ -612,6 +651,18 @@ paths:
          description: OK
          schema:
            $ref: '#/definitions/handlers.ImageMetaResp'
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
      summary: 获取随机图片元数据
      tags:
      - image
@@ -641,6 +692,18 @@ paths:
          description: OK
          schema:
            type: file
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
      summary: 获取今日图片
      tags:
      - image
@@ -659,6 +722,18 @@ paths:
          description: OK
          schema:
            $ref: '#/definitions/handlers.ImageMetaResp'
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
      summary: 获取今日图片元数据
      tags:
      - image
@@ -700,6 +775,21 @@ paths:
      summary: 获取图片列表
      tags:
      - image
+  /images/global/today:
+    get:
+      description: 获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            items:
+              $ref: '#/definitions/handlers.ImageMetaResp'
+            type: array
+      summary: 获取所有地区的今日图片列表
+      tags:
+      - image
  /regions:
    get:
      description: 返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -60,8 +60,9 @@ func (c LogConfig) GetShowDBLog() bool    { return c.ShowDBLog }
 func (c LogConfig) GetDBLogLevel() string { return c.DBLogLevel }

 type APIConfig struct {
-	Mode              string `mapstructure:"mode" yaml:"mode"`                               // local | redirect
-	EnableMktFallback bool   `mapstructure:"enable_mkt_fallback" yaml:"enable_mkt_fallback"` // 当请求的地区不存在时，是否回退到默认地区
+	Mode                string `mapstructure:"mode" yaml:"mode"`                                     // local | redirect
+	EnableMktFallback   bool   `mapstructure:"enable_mkt_fallback" yaml:"enable_mkt_fallback"`       // 当请求的地区不存在时，是否回退到默认地区
+	EnableOnDemandFetch bool   `mapstructure:"enable_on_demand_fetch" yaml:"enable_on_demand_fetch"` // 是否启用按需抓取
 }

 type CronConfig struct {
@@ -165,7 +166,8 @@ func Init(configPath string) error {
 	v.SetDefault("log.show_db_log", false)
 	v.SetDefault("log.db_log_level", "info")
 	v.SetDefault("api.mode", "redirect")
-	v.SetDefault("api.enable_mkt_fallback", true)
+	v.SetDefault("api.enable_mkt_fallback", false)
+	v.SetDefault("api.enable_on_demand_fetch", false)
 	v.SetDefault("cron.enabled", true)
 	v.SetDefault("cron.daily_spec", "20 8-23/4 * * *")
 	v.SetDefault("retention.days", 0)
@@ -328,8 +330,8 @@ func GetTokenTTL() time.Duration {
 	return ttl
 }

-// GetDefaultMkt 返回生效的默认地区编码
-func (c *Config) GetDefaultMkt() string {
+// GetDefaultRegion 返回生效的默认地区编码
+func (c *Config) GetDefaultRegion() string {
 	if len(c.Fetcher.Regions) > 0 {
 		return c.Fetcher.Regions[0]
 	}
--- a/internal/http/handlers/image.go
+++ b/internal/http/handlers/image.go
@@ -5,8 +5,8 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"sort"
 	"strconv"
+	"strings"

 	"BingPaper/internal/config"
 	"BingPaper/internal/model"
@@ -48,15 +48,21 @@ type ImageMetaResp struct {
 // @Param format query string false "格式 (jpg)" default(jpg)
 // @Produce image/jpeg
 // @Success 200 {file} binary
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/today [get]
 func GetToday(c *gin.Context) {
 	mkt := c.Query("mkt")
-	img, err := image.GetTodayImage(mkt)
-	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+	imgRegion, err := image.GetTodayImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
 		return
 	}
-	handleImageResponse(c, img, 7200) // 2小时
+	if err != nil {
+		sendImageNotFound(c, mkt)
+		return
+	}
+	handleImageResponse(c, imgRegion, 7200) // 2小时
 }

 // GetTodayMeta 获取今日图片元数据
@@ -66,16 +72,22 @@ func GetToday(c *gin.Context) {
 // @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Produce json
 // @Success 200 {object} ImageMetaResp
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/today/meta [get]
 func GetTodayMeta(c *gin.Context) {
 	mkt := c.Query("mkt")
-	img, err := image.GetTodayImage(mkt)
+	imgRegion, err := image.GetTodayImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	c.Header("Cache-Control", "public, max-age=7200") // 2小时
-	c.JSON(http.StatusOK, formatMeta(img))
+	c.JSON(http.StatusOK, formatMeta(imgRegion))
 }

 // GetRandom 获取随机图片
@@ -87,15 +99,22 @@ func GetTodayMeta(c *gin.Context) {
 // @Param format query string false "格式" default(jpg)
 // @Produce image/jpeg
 // @Success 200 {file} binary
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/random [get]
+// GetRandom 获取随机图片
 func GetRandom(c *gin.Context) {
 	mkt := c.Query("mkt")
-	img, err := image.GetRandomImage(mkt)
-	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+	imgRegion, err := image.GetRandomImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
 		return
 	}
-	handleImageResponse(c, img, 0) // 禁用缓存
+	if err != nil {
+		sendImageNotFound(c, mkt)
+		return
+	}
+	handleImageResponse(c, imgRegion, 0) // 禁用缓存
 }

 // GetRandomMeta 获取随机图片元数据
@@ -105,16 +124,22 @@ func GetRandom(c *gin.Context) {
 // @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Produce json
 // @Success 200 {object} ImageMetaResp
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/random/meta [get]
 func GetRandomMeta(c *gin.Context) {
 	mkt := c.Query("mkt")
-	img, err := image.GetRandomImage(mkt)
+	imgRegion, err := image.GetRandomImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
-	c.JSON(http.StatusOK, formatMeta(img))
+	c.JSON(http.StatusOK, formatMeta(imgRegion))
 }

 // GetByDate 获取指定日期图片
@@ -127,16 +152,22 @@ func GetRandomMeta(c *gin.Context) {
 // @Param format query string false "格式" default(jpg)
 // @Produce image/jpeg
 // @Success 200 {file} binary
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/date/{date} [get]
 func GetByDate(c *gin.Context) {
 	date := c.Param("date")
 	mkt := c.Query("mkt")
-	img, err := image.GetImageByDate(date, mkt)
-	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+	imgRegion, err := image.GetImageByDate(date, mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
 		return
 	}
-	handleImageResponse(c, img, 604800) // 7天
+	if err != nil {
+		sendImageNotFound(c, mkt)
+		return
+	}
+	handleImageResponse(c, imgRegion, 604800) // 7天
 }

 // GetByDateMeta 获取指定日期图片元数据
@@ -147,17 +178,23 @@ func GetByDate(c *gin.Context) {
 // @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Produce json
 // @Success 200 {object} ImageMetaResp
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/date/{date}/meta [get]
 func GetByDateMeta(c *gin.Context) {
 	date := c.Param("date")
 	mkt := c.Query("mkt")
-	img, err := image.GetImageByDate(date, mkt)
+	imgRegion, err := image.GetImageByDate(date, mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	c.Header("Cache-Control", "public, max-age=604800") // 7天
-	c.JSON(http.StatusOK, formatMeta(img))
+	c.JSON(http.StatusOK, formatMeta(imgRegion))
 }

 // ListImages 获取图片列表
@@ -223,21 +260,70 @@ func ListImages(c *gin.Context) {
 	c.JSON(http.StatusOK, result)
 }

-func handleImageResponse(c *gin.Context, img *model.Image, maxAge int) {
+// ListGlobalTodayImages 获取所有地区的今日图片列表
+// @Summary 获取所有地区的今日图片列表
+// @Description 获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）
+// @Tags image
+// @Produce json
+// @Success 200 {array} ImageMetaResp
+// @Router /images/global/today [get]
+func ListGlobalTodayImages(c *gin.Context) {
+	images, err := image.GetAllRegionsTodayImages()
+	if err != nil {
+		util.Logger.Error("ListGlobalTodayImages service call failed", zap.Error(err))
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	result := []gin.H{}
+	for _, img := range images {
+		result = append(result, formatMetaSummary(&img))
+	}
+	c.JSON(http.StatusOK, result)
+}
+
+func sendImageNotFound(c *gin.Context, mkt string) {
+	cfg := config.GetConfig().API
+	message := "image not found"
+
+	if mkt != "" {
+		reasons := []string{}
+		if !util.IsValidRegion(mkt) {
+			reasons = append(reasons, fmt.Sprintf("[%s] is not a standard region code", mkt))
+		} else {
+			if !cfg.EnableOnDemandFetch {
+				reasons = append(reasons, "on-demand fetch is disabled")
+			}
+			if !cfg.EnableMktFallback {
+				reasons = append(reasons, "region fallback is disabled")
+			}
+		}
+
+		if len(reasons) > 0 {
+			message = fmt.Sprintf("Image not found for region [%s]. Reasons: %s.", mkt, strings.Join(reasons, ", "))
+		} else {
+			message = fmt.Sprintf("Image not found for region [%s] even after on-demand fetch and fallback attempts.", mkt)
+		}
+	}
+
+	c.JSON(http.StatusNotFound, gin.H{"error": message})
+}
+
+func handleImageResponse(c *gin.Context, m *model.ImageRegion, maxAge int) {
 	variant := c.DefaultQuery("variant", "UHD")
 	format := c.DefaultQuery("format", "jpg")

 	var selected *model.ImageVariant
-	for _, v := range img.Variants {
+	for _, v := range m.Variants {
 		if v.Variant == variant && v.Format == format {
 			selected = &v
 			break
 		}
 	}

-	if selected == nil && len(img.Variants) > 0 {
+	if selected == nil && len(m.Variants) > 0 {
 		// 回退逻辑
-		selected = &img.Variants[0]
+		selected = &m.Variants[0]
 	}

 	if selected == nil {
@@ -254,9 +340,9 @@ func handleImageResponse(c *gin.Context, img *model.Image, maxAge int) {
 				c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
 			}
 			c.Redirect(http.StatusFound, selected.PublicURL)
-		} else if img.URLBase != "" {
+		} else if m.URLBase != "" {
 			// 兜底重定向到原始 Bing
-			bingURL := fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, selected.Variant)
+			bingURL := fmt.Sprintf("https://www.bing.com%s_%s.jpg", m.URLBase, selected.Variant)
 			if maxAge > 0 {
 				c.Header("Cache-Control", fmt.Sprintf("public, max-age=%d", maxAge))
 			} else {
@@ -264,10 +350,10 @@ func handleImageResponse(c *gin.Context, img *model.Image, maxAge int) {
 			}
 			c.Redirect(http.StatusFound, bingURL)
 		} else {
-			serveLocal(c, selected.StorageKey, img.Date, maxAge)
+			serveLocal(c, selected.StorageKey, m.Date, maxAge)
 		}
 	} else {
-		serveLocal(c, selected.StorageKey, img.Date, maxAge)
+		serveLocal(c, selected.StorageKey, m.Date, maxAge)
 	}
 }

@@ -300,25 +386,36 @@ func serveLocal(c *gin.Context, key string, etag string, maxAge int) {
 	io.Copy(c.Writer, reader)
 }

-func formatMetaSummary(img *model.Image) gin.H {
+func formatMetaSummary(m *model.ImageRegion) gin.H {
 	cfg := config.GetConfig()

-	// 找到最小的变体（Size 最小）
+	// 找到最小的变体
 	var smallest *model.ImageVariant
-	for i := range img.Variants {
-		v := &img.Variants[i]
-		if smallest == nil || v.Size < smallest.Size {
+	for i := range m.Variants {
+		v := &m.Variants[i]
+		if smallest == nil {
 			smallest = v
+			continue
+		}
+
+		// 如果当前变体 Size 更小且不为 0，或者 smallest 的 Size 为 0
+		if v.Size > 0 && (smallest.Size == 0 || v.Size < smallest.Size) {
+			smallest = v
+		} else if v.Size == smallest.Size {
+			// 如果 Size 相同（包括都为 0），根据分辨率名称判断
+			if compareResolution(v.Variant, smallest.Variant) < 0 {
+				smallest = v
+			}
 		}
 	}

 	variants := []gin.H{}
 	if smallest != nil {
 		url := smallest.PublicURL
-		if url == "" && cfg.API.Mode == "redirect" && img.URLBase != "" {
-			url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, smallest.Variant)
+		if url == "" && cfg.API.Mode == "redirect" && m.URLBase != "" {
+			url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", m.URLBase, smallest.Variant)
 		} else if cfg.API.Mode == "local" || url == "" {
-			url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, img.Date, smallest.Variant, smallest.Format, img.Mkt)
+			url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, m.Date, smallest.Variant, smallest.Format, m.Mkt)
 		}
 		variants = append(variants, gin.H{
 			"variant":     smallest.Variant,
@@ -330,28 +427,28 @@ func formatMetaSummary(img *model.Image) gin.H {
 	}

 	return gin.H{
-		"date":          img.Date,
-		"mkt":           img.Mkt,
-		"title":         img.Title,
-		"copyright":     img.Copyright,
-		"copyrightlink": img.CopyrightLink,
-		"quiz":          img.Quiz,
-		"startdate":     img.StartDate,
-		"fullstartdate": img.FullStartDate,
-		"hsh":           img.HSH,
+		"date":          m.Date,
+		"mkt":           m.Mkt,
+		"title":         m.Title,
+		"copyright":     m.Copyright,
+		"copyrightlink": m.CopyrightLink,
+		"quiz":          m.Quiz,
+		"startdate":     m.StartDate,
+		"fullstartdate": m.FullStartDate,
+		"hsh":           m.HSH,
 		"variants":      variants,
 	}
 }

-func formatMeta(img *model.Image) gin.H {
+func formatMeta(m *model.ImageRegion) gin.H {
 	cfg := config.GetConfig()
 	variants := []gin.H{}
-	for _, v := range img.Variants {
+	for _, v := range m.Variants {
 		url := v.PublicURL
-		if url == "" && cfg.API.Mode == "redirect" && img.URLBase != "" {
-			url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, v.Variant)
+		if url == "" && cfg.API.Mode == "redirect" && m.URLBase != "" {
+			url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", m.URLBase, v.Variant)
 		} else if cfg.API.Mode == "local" || url == "" {
-			url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, img.Date, v.Variant, v.Format, img.Mkt)
+			url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, m.Date, v.Variant, v.Format, m.Mkt)
 		}
 		variants = append(variants, gin.H{
 			"variant":     v.Variant,
@@ -363,15 +460,15 @@ func formatMeta(img *model.Image) gin.H {
 	}

 	return gin.H{
-		"date":          img.Date,
-		"mkt":           img.Mkt,
-		"title":         img.Title,
-		"copyright":     img.Copyright,
-		"copyrightlink": img.CopyrightLink,
-		"quiz":          img.Quiz,
-		"startdate":     img.StartDate,
-		"fullstartdate": img.FullStartDate,
-		"hsh":           img.HSH,
+		"date":          m.Date,
+		"mkt":           m.Mkt,
+		"title":         m.Title,
+		"copyright":     m.Copyright,
+		"copyrightlink": m.CopyrightLink,
+		"quiz":          m.Quiz,
+		"startdate":     m.StartDate,
+		"fullstartdate": m.FullStartDate,
+		"hsh":           m.HSH,
 		"variants":      variants,
 	}
 }
@@ -387,34 +484,85 @@ func GetRegions(c *gin.Context) {
 	cfg := config.GetConfig()
 	pinned := cfg.Fetcher.Regions

-	// 创建副本以避免修改原始全局变量
-	all := make([]util.Region, len(util.AllRegions))
-	copy(all, util.AllRegions)
-
-	if len(pinned) > 0 {
-		// 创建一个 Map 用于快速查找置顶地区及其顺序
-		pinnedMap := make(map[string]int)
-		for i, v := range pinned {
-			pinnedMap[v] = i
-		}
-
-		// 对列表进行稳定排序，使置顶地区排在前面
-		sort.SliceStable(all, func(i, j int) bool {
-			idxI, okI := pinnedMap[all[i].Value]
-			idxJ, okJ := pinnedMap[all[j].Value]
-
-			if okI && okJ {
-				return idxI < idxJ
-			}
-			if okI {
-				return true
-			}
-			if okJ {
-				return false
-			}
-			return false // 保持非置顶地区的原有相对顺序
-		})
+	if len(pinned) == 0 {
+		// 如果没有配置抓取地区，返回所有支持的地区
+		c.JSON(http.StatusOK, util.AllRegions)
+		return
 	}

-	c.JSON(http.StatusOK, all)
+	// 创建一个 Map 用于快速查找配置的地区
+	pinnedMap := make(map[string]bool)
+	for _, v := range pinned {
+		pinnedMap[v] = true
+	}
+
+	// 只返回配置中的地区，并保持配置中的顺序
+	var result []util.Region
+	// 为了保持配置顺序，我们遍历 pinned 而不是 AllRegions
+	for _, pVal := range pinned {
+		for _, r := range util.AllRegions {
+			if r.Value == pVal {
+				result = append(result, r)
+				break
+			}
+		}
+	}
+
+	// 如果配置了一些不在 AllRegions 里的 mkt，上述循环可能漏掉
+	// 但根据之前的逻辑，AllRegions 是已知的 17 个地区。
+	// 如果用户配置了 fr-CA (不在 17 个内)，我们也应该返回它吗？
+	// 需求说 "前端页面对地区进行约束"，如果配置了，前端就该显示。
+	// 如果不在 AllRegions 里的，我们直接返回原始编码作为 label 或者查找一下。
+
+	if len(result) < len(pinned) {
+		// 补全不在 AllRegions 里的地区
+		for _, pVal := range pinned {
+			found := false
+			for _, r := range result {
+				if r.Value == pVal {
+					found = true
+					break
+				}
+			}
+			if !found {
+				result = append(result, util.Region{Value: pVal, Label: pVal})
+			}
+		}
+	}
+
+	c.JSON(http.StatusOK, result)
+}
+
+// compareResolution 比较两个分辨率变体的大小。
+// 返回 < 0 表示 v1 < v2，返回 > 0 表示 v1 > v2，返回 0 表示相等。
+func compareResolution(v1, v2 string) int {
+	resOrder := map[string]int{
+		"320x240":   1,
+		"400x240":   2,
+		"480x360":   3,
+		"640x360":   4,
+		"640x480":   5,
+		"800x480":   6,
+		"800x600":   7,
+		"1024x768":  8,
+		"1280x720":  9,
+		"1366x768":  10,
+		"1920x1080": 11,
+		"UHD":       12,
+	}
+
+	o1, ok1 := resOrder[v1]
+	o2, ok2 := resOrder[v2]
+
+	if !ok1 && !ok2 {
+		return strings.Compare(v1, v2)
+	}
+	if !ok1 {
+		return 1 // 未知的分辨率认为比已知的大
+	}
+	if !ok2 {
+		return -1
+	}
+
+	return o1 - o2
 }
--- a/internal/http/handlers/image_test.go
+++ b/internal/http/handlers/image_test.go
@@ -21,11 +21,15 @@ func TestHandleImageResponseRedirect(t *testing.T) {
 	config.GetConfig().API.Mode = "redirect"

 	// Mock Image and Variant
-	img := &model.Image{
-		Date:    "2026-01-26",
-		URLBase: "/th?id=OHR.TestImage",
+	imgRegion := &model.ImageRegion{
+		Date:      "2026-01-26",
+		Mkt:       "zh-CN",
+		HSH:       "testhsh",
+		ImageName: "TestImage",
+		URLBase:   "/th?id=OHR.TestImage",
 		Variants: []model.ImageVariant{
 			{
+				ImageName:  "TestImage",
 				Variant:    "UHD",
 				Format:     "jpg",
 				PublicURL:  "", // Empty for local storage simulation
@@ -39,7 +43,7 @@ func TestHandleImageResponseRedirect(t *testing.T) {
 		c, _ := gin.CreateTestContext(w)
 		c.Request, _ = http.NewRequest("GET", "/api/v1/image/today?variant=UHD", nil)

-		handleImageResponse(c, img, 0)
+		handleImageResponse(c, imgRegion, 0)

 		assert.Equal(t, http.StatusFound, w.Code)
 		assert.Contains(t, w.Header().Get("Location"), "bing.com")
@@ -48,7 +52,7 @@ func TestHandleImageResponseRedirect(t *testing.T) {

 	t.Run("FormatMeta in redirect mode should return Bing URL if PublicURL is empty", func(t *testing.T) {
 		config.GetConfig().API.Mode = "redirect"
-		meta := formatMeta(img)
+		meta := formatMeta(imgRegion)

 		variants := meta["variants"].([]gin.H)
 		assert.Equal(t, 1, len(variants))
@@ -59,7 +63,7 @@ func TestHandleImageResponseRedirect(t *testing.T) {
 	t.Run("FormatMeta in local mode should return API URL", func(t *testing.T) {
 		config.GetConfig().API.Mode = "local"
 		config.GetConfig().Server.BaseURL = "http://myserver.com"
-		meta := formatMeta(img)
+		meta := formatMeta(imgRegion)

 		variants := meta["variants"].([]gin.H)
 		assert.Equal(t, 1, len(variants))
@@ -68,12 +72,13 @@ func TestHandleImageResponseRedirect(t *testing.T) {
 	})

 	t.Run("FormatMetaSummary should only return the smallest variant", func(t *testing.T) {
-		imgWithMultipleVariants := &model.Image{
-			Date: "2026-01-26",
+		imgWithMultipleVariants := &model.ImageRegion{
+			Date:      "2026-01-26",
+			ImageName: "TestImage2",
 			Variants: []model.ImageVariant{
-				{Variant: "UHD", Size: 1000, Format: "jpg"},
-				{Variant: "640x480", Size: 200, Format: "jpg"},
-				{Variant: "1920x1080", Size: 500, Format: "jpg"},
+				{ImageName: "TestImage2", Variant: "UHD", Size: 1000, Format: "jpg"},
+				{ImageName: "TestImage2", Variant: "640x480", Size: 200, Format: "jpg"},
+				{ImageName: "TestImage2", Variant: "1920x1080", Size: 500, Format: "jpg"},
 			},
 		}
 		meta := formatMetaSummary(imgWithMultipleVariants)
@@ -81,6 +86,21 @@ func TestHandleImageResponseRedirect(t *testing.T) {
 		assert.Equal(t, 1, len(variants))
 		assert.Equal(t, "640x480", variants[0]["variant"])
 	})
+
+	t.Run("FormatMetaSummary should handle zero size by following order if names suggest it", func(t *testing.T) {
+		imgWithZeroSize := &model.ImageRegion{
+			Date:      "2026-01-26",
+			ImageName: "TestImage3",
+			Variants: []model.ImageVariant{
+				{ImageName: "TestImage3", Variant: "UHD", Size: 0, Format: "jpg"},
+				{ImageName: "TestImage3", Variant: "320x240", Size: 0, Format: "jpg"},
+			},
+		}
+		meta := formatMetaSummary(imgWithZeroSize)
+		variants := meta["variants"].([]gin.H)
+		assert.Equal(t, 1, len(variants))
+		assert.Equal(t, "320x240", variants[0]["variant"])
+	})
 }

 func TestGetRegions(t *testing.T) {
--- a/internal/http/router.go
+++ b/internal/http/router.go
@@ -47,6 +47,7 @@ func SetupRouter(webFS embed.FS) *gin.Engine {
 			img.GET("/date/:date/meta", handlers.GetByDateMeta)
 		}
 		api.GET("/images", handlers.ListImages)
+		api.GET("/images/global/today", handlers.ListGlobalTodayImages)
 		api.GET("/regions", handlers.GetRegions)

 		// 管理接口
--- a/internal/model/models.go
+++ b/internal/model/models.go
@@ -6,29 +6,30 @@ import (
 	"gorm.io/gorm"
 )

-type Image struct {
+type ImageRegion struct {
 	ID            uint           `gorm:"primaryKey" json:"id"`
-	Date          string         `gorm:"uniqueIndex:idx_date_mkt;type:varchar(10)" json:"date"` // YYYY-MM-DD
-	Mkt           string         `gorm:"uniqueIndex:idx_date_mkt;type:varchar(10)" json:"mkt"`  // zh-CN, en-US etc.
+	Date          string         `gorm:"uniqueIndex:idx_date_mkt;index:idx_mkt_date,priority:2;type:varchar(10)" json:"date"` // YYYY-MM-DD
+	Mkt           string         `gorm:"uniqueIndex:idx_date_mkt;index:idx_mkt_date,priority:1;type:varchar(10)" json:"mkt"`  // zh-CN, en-US etc.
+	HSH           string         `gorm:"type:varchar(64)" json:"hsh"`
+	URLBase       string         `json:"urlbase"`
+	ImageName     string         `gorm:"index" json:"image_name"`
 	Title         string         `json:"title"`
 	Copyright     string         `json:"copyright"`
 	CopyrightLink string         `json:"copyrightlink"`
-	URLBase       string         `json:"urlbase"`
 	Quiz          string         `json:"quiz"`
 	StartDate     string         `json:"startdate"`
 	FullStartDate string         `json:"fullstartdate"`
-	HSH           string         `json:"hsh"`
 	CreatedAt     time.Time      `json:"created_at"`
 	UpdatedAt     time.Time      `json:"updated_at"`
 	DeletedAt     gorm.DeletedAt `gorm:"index" json:"-"`
-	Variants      []ImageVariant `gorm:"foreignKey:ImageID;constraint:OnUpdate:CASCADE,OnDelete:SET NULL;" json:"variants"`
+	Variants      []ImageVariant `gorm:"foreignKey:ImageName;references:ImageName" json:"variants"`
 }

 type ImageVariant struct {
 	ID         uint      `gorm:"primaryKey" json:"id"`
-	ImageID    uint      `gorm:"index;uniqueIndex:idx_image_variant_format" json:"image_id"`
-	Variant    string    `gorm:"uniqueIndex:idx_image_variant_format;type:varchar(20)" json:"variant"` // UHD, 1920x1080, etc.
-	Format     string    `gorm:"uniqueIndex:idx_image_variant_format;type:varchar(10)" json:"format"`  // jpg, webp
+	ImageName  string    `gorm:"uniqueIndex:idx_name_variant_format;type:varchar(100)" json:"image_name"`
+	Variant    string    `gorm:"uniqueIndex:idx_name_variant_format;type:varchar(20)" json:"variant"` // UHD, 1920x1080, etc.
+	Format     string    `gorm:"uniqueIndex:idx_name_variant_format;type:varchar(10)" json:"format"`  // jpg, webp
 	StorageKey string    `json:"storage_key"`
 	PublicURL  string    `json:"public_url"`
 	Size       int64     `json:"size"`
--- a/internal/repo/db.go
+++ b/internal/repo/db.go
@@ -131,7 +131,7 @@ func InitDB() error {
 	// 但此处假设 DSN 中指定的数据库已经存在。AutoMigrate 会负责创建表。

 	// 迁移
-	if err := db.AutoMigrate(&model.Image{}, &model.ImageVariant{}, &model.Token{}); err != nil {
+	if err := db.AutoMigrate(&model.ImageRegion{}, &model.ImageVariant{}, &model.Token{}); err != nil {
 		util.Logger.Error("Database migration failed", zap.Error(err))
 		return err
 	}
--- a/internal/repo/migration.go
+++ b/internal/repo/migration.go
@@ -29,19 +29,17 @@ func MigrateDataToNewDB(oldDB *gorm.DB, newConfig *config.Config) error {
 	}

 	// 2. 自动迁移结构
-	if err := newDB.AutoMigrate(&model.Image{}, &model.ImageVariant{}, &model.Token{}); err != nil {
+	if err := newDB.AutoMigrate(&model.ImageRegion{}, &model.ImageVariant{}, &model.Token{}); err != nil {
 		return fmt.Errorf("failed to migrate schema in new DB: %w", err)
 	}

 	// 3. 清空新数据库中的现有数据（防止冲突）
 	util.Logger.Info("Cleaning up destination database before migration")
-	// 备份或清空目标数据库。由于用户要求“可能需要清空或备份”，
-	// 这里我们选择在迁移前清空目标表，以确保迁移过来的数据是完整且不冲突的。
 	if err := newDB.Session(&gorm.Session{AllowGlobalUpdate: true}).Delete(&model.ImageVariant{}).Error; err != nil {
 		return fmt.Errorf("failed to clear ImageVariants: %w", err)
 	}
-	if err := newDB.Session(&gorm.Session{AllowGlobalUpdate: true}).Delete(&model.Image{}).Error; err != nil {
-		return fmt.Errorf("failed to clear Images: %w", err)
+	if err := newDB.Session(&gorm.Session{AllowGlobalUpdate: true}).Delete(&model.ImageRegion{}).Error; err != nil {
+		return fmt.Errorf("failed to clear ImageRegions: %w", err)
 	}
 	if err := newDB.Session(&gorm.Session{AllowGlobalUpdate: true}).Delete(&model.Token{}).Error; err != nil {
 		return fmt.Errorf("failed to clear Tokens: %w", err)
@@ -50,15 +48,15 @@ func MigrateDataToNewDB(oldDB *gorm.DB, newConfig *config.Config) error {
 	// 4. 开始迁移数据
 	// 使用事务确保迁移的原子性
 	return newDB.Transaction(func(tx *gorm.DB) error {
-		// 迁移 Images
-		var images []model.Image
-		if err := oldDB.Find(&images).Error; err != nil {
-			return fmt.Errorf("failed to fetch images from old DB: %w", err)
+		// 迁移 ImageRegions
+		var regions []model.ImageRegion
+		if err := oldDB.Find(&regions).Error; err != nil {
+			return fmt.Errorf("failed to fetch image regions from old DB: %w", err)
 		}
-		if len(images) > 0 {
-			util.Logger.Info("Migrating images", zap.Int("count", len(images)))
-			if err := tx.Create(&images).Error; err != nil {
-				return fmt.Errorf("failed to insert images into new DB: %w", err)
+		if len(regions) > 0 {
+			util.Logger.Info("Migrating image regions", zap.Int("count", len(regions)))
+			if err := tx.Create(&regions).Error; err != nil {
+				return fmt.Errorf("failed to insert image regions into new DB: %w", err)
 			}
 		}

--- a/internal/service/fetcher/fetcher.go
+++ b/internal/service/fetcher/fetcher.go
@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"

 	"BingPaper/internal/config"
@@ -57,19 +58,12 @@ func (f *Fetcher) Fetch(ctx context.Context, n int) error {
 	util.Logger.Info("Starting fetch task", zap.Int("n", n))
 	regions := config.GetConfig().Fetcher.Regions
 	if len(regions) == 0 {
-		regions = []string{config.GetConfig().GetDefaultMkt()}
+		regions = []string{config.GetConfig().GetDefaultRegion()}
 	}

 	for _, mkt := range regions {
-		util.Logger.Info("Fetching images for region", zap.String("mkt", mkt))
-		// 调用两次 API 获取最多两周的数据
-		// 第一次 idx=0&n=8 (今天起往回数 8 张)
-		if err := f.fetchByMkt(ctx, mkt, 0, 8); err != nil {
-			util.Logger.Error("Failed to fetch images", zap.String("mkt", mkt), zap.Int("idx", 0), zap.Error(err))
-		}
-		// 第二次 idx=7&n=8 (7天前起往回数 8 张，与第一次有重叠，确保不漏)
-		if err := f.fetchByMkt(ctx, mkt, 7, 8); err != nil {
-			util.Logger.Error("Failed to fetch images", zap.String("mkt", mkt), zap.Int("idx", 7), zap.Error(err))
+		if err := f.FetchRegion(ctx, mkt); err != nil {
+			util.Logger.Error("Failed to fetch region images", zap.String("mkt", mkt), zap.Error(err))
 		}
 	}

@@ -77,16 +71,51 @@ func (f *Fetcher) Fetch(ctx context.Context, n int) error {
 	return nil
 }

+// FetchRegion 抓取指定地区的图片
+func (f *Fetcher) FetchRegion(ctx context.Context, mkt string) error {
+	if !util.IsValidRegion(mkt) {
+		util.Logger.Warn("Skipping fetch for invalid region", zap.String("mkt", mkt))
+		return fmt.Errorf("invalid region code: %s", mkt)
+	}
+	util.Logger.Info("Fetching images for region", zap.String("mkt", mkt))
+	// 调用两次 API 获取最多两周的数据
+	// 第一次 idx=0&n=8 (今天起往回数 8 张)
+	if err := f.fetchByMkt(ctx, mkt, 0, 8); err != nil {
+		util.Logger.Error("Failed to fetch images", zap.String("mkt", mkt), zap.Int("idx", 0), zap.Error(err))
+		return err
+	}
+	// 第二次 idx=7&n=8 (7天前起往回数 8 张，与第一次有重叠，确保不漏)
+	if err := f.fetchByMkt(ctx, mkt, 7, 8); err != nil {
+		util.Logger.Error("Failed to fetch images", zap.String("mkt", mkt), zap.Int("idx", 7), zap.Error(err))
+		// 第二次失败不一定返回错误，因为可能第一次已经拿到了
+	}
+	return nil
+}
+
 func (f *Fetcher) fetchByMkt(ctx context.Context, mkt string, idx int, n int) error {
-	url := fmt.Sprintf("%s?format=js&idx=%d&n=%d&uhd=1&mkt=%s", config.BingAPIBase, idx, n, mkt)
-	util.Logger.Debug("Requesting Bing API", zap.String("url", url))
-	resp, err := f.httpClient.Get(url)
+	lang := strings.Split(mkt, "-")[0]
+	url := fmt.Sprintf("%s?format=js&idx=%d&n=%d&uhd=1&mkt=%s&setlang=%s", config.BingAPIBase, idx, n, mkt, lang)
+	util.Logger.Info("Requesting Bing API", zap.String("url", url))
+
+	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
+	if err != nil {
+		util.Logger.Error("Failed to create Bing API request", zap.Error(err))
+		return err
+	}
+
+	// 添加请求头以增强地区/语言识别
+	req.Header.Set("Accept-Language", fmt.Sprintf("%s,%s;q=0.9", mkt, lang))
+	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36")
+
+	resp, err := f.httpClient.Do(req)
 	if err != nil {
 		util.Logger.Error("Failed to request Bing API", zap.Error(err))
 		return err
 	}
 	defer resp.Body.Close()

+	util.Logger.Info("Received response from Bing API", zap.String("mkt", mkt), zap.Int("status", resp.StatusCode))
+
 	var bingResp BingResponse
 	if err := json.NewDecoder(resp.Body).Decode(&bingResp); err != nil {
 		util.Logger.Error("Failed to decode Bing API response", zap.Error(err))
@@ -96,6 +125,12 @@ func (f *Fetcher) fetchByMkt(ctx context.Context, mkt string, idx int, n int) er
 	util.Logger.Info("Fetched images from Bing", zap.String("mkt", mkt), zap.Int("count", len(bingResp.Images)))

 	for _, bingImg := range bingResp.Images {
+		util.Logger.Info("Bing image metadata",
+			zap.String("mkt", mkt),
+			zap.String("date", bingImg.Enddate),
+			zap.String("title", bingImg.Title),
+			zap.String("hsh", bingImg.HSH))
+
 		if err := f.processImage(ctx, bingImg, mkt); err != nil {
 			util.Logger.Error("Failed to process image", zap.String("date", bingImg.Enddate), zap.String("mkt", mkt), zap.Error(err))
 		}
@@ -107,64 +142,17 @@ func (f *Fetcher) fetchByMkt(ctx context.Context, mkt string, idx int, n int) er
 func (f *Fetcher) processImage(ctx context.Context, bingImg BingImage, mkt string) error {
 	dateStr := fmt.Sprintf("%s-%s-%s", bingImg.Enddate[0:4], bingImg.Enddate[4:6], bingImg.Enddate[6:8])

-	// 幂等检查
-	var existing model.Image
-	if err := repo.DB.Where("date = ? AND mkt = ?", dateStr, mkt).First(&existing).Error; err == nil {
-		util.Logger.Info("Image already exists, skipping", zap.String("date", dateStr), zap.String("mkt", mkt))
+	// 1. 地区关联幂等检查
+	var existingRegion model.ImageRegion
+	if err := repo.DB.Where("date = ? AND mkt = ?", dateStr, mkt).First(&existingRegion).Error; err == nil {
+		util.Logger.Info("ImageRegion record already exists, skipping", zap.String("date", dateStr), zap.String("mkt", mkt), zap.String("title", bingImg.Title))
 		return nil
 	}

-	util.Logger.Info("Processing new image", zap.String("date", dateStr), zap.String("mkt", mkt), zap.String("title", bingImg.Title))
+	imageName := f.extractImageName(bingImg.URLBase, bingImg.HSH)

-	// UHD 探测
-	imgURL, variantName := f.probeUHD(bingImg.URLBase)
-
-	imgData, err := f.downloadImage(imgURL)
-	if err != nil {
-		util.Logger.Error("Failed to download image", zap.String("url", imgURL), zap.Error(err))
-		return err
-	}
-
-	// 解码图片用于缩放
-	srcImg, _, err := image.Decode(bytes.NewReader(imgData))
-	if err != nil {
-		util.Logger.Error("Failed to decode image data", zap.Error(err))
-		return err
-	}
-
-	// 创建 DB 记录
-	dbImg := model.Image{
-		Date:          dateStr,
-		Mkt:           mkt,
-		Title:         bingImg.Title,
-		Copyright:     bingImg.Copyright,
-		CopyrightLink: bingImg.CopyrightLink,
-		URLBase:       bingImg.URLBase,
-		Quiz:          bingImg.Quiz,
-		StartDate:     bingImg.Startdate,
-		FullStartDate: bingImg.Fullstartdate,
-		HSH:           bingImg.HSH,
-	}
-
-	if err := repo.DB.Clauses(clause.OnConflict{
-		Columns:   []clause.Column{{Name: "date"}, {Name: "mkt"}},
-		DoNothing: true,
-	}).Create(&dbImg).Error; err != nil {
-		util.Logger.Error("Failed to create image record", zap.Error(err))
-		return err
-	}
-
-	// 再次检查 dbImg.ID 是否被填充，如果没有被填充（说明由于冲突未插入），则需要查询出已有的 ID
-	if dbImg.ID == 0 {
-		var existing model.Image
-		if err := repo.DB.Where("date = ? AND mkt = ?", dateStr, mkt).First(&existing).Error; err != nil {
-			util.Logger.Error("Failed to query existing image record after conflict", zap.Error(err))
-			return err
-		}
-		dbImg = existing
-	}
-
-	// 保存各种分辨率
+	// 2. 处理变体
+	imgURL, variantName := f.probeUHD(ctx, bingImg.URLBase)
 	targetVariants := []struct {
 		name   string
 		width  int
@@ -183,51 +171,138 @@ func (f *Fetcher) processImage(ctx context.Context, bingImg BingImage, mkt strin
 		{"320x240", 320, 240},
 	}

-	// 首先保存原图 (UHD 或 1080p)
-	if err := f.saveVariant(ctx, &dbImg, variantName, "jpg", imgData); err != nil {
-		util.Logger.Error("Failed to save original variant", zap.String("variant", variantName), zap.Error(err))
-	}
+	// 检查变体是否已存在 (通过 ImageName)
+	var existingVariants []model.ImageVariant
+	repo.DB.Where("image_name = ?", imageName).Find(&existingVariants)

-	for _, v := range targetVariants {
-		// 如果目标分辨率就是原图分辨率，则跳过（已经保存过了）
-		if v.name == variantName {
-			continue
+	allVariantsExist := len(existingVariants) > 0
+
+	var srcImg image.Image
+	var imgData []byte
+
+	if allVariantsExist {
+		util.Logger.Debug("Image variants already exist for name, linking only", zap.String("imageName", imageName))
+	} else {
+		util.Logger.Debug("Downloading and processing image", zap.String("url", imgURL), zap.String("imageName", imageName))
+		var err error
+		imgData, err = f.downloadImage(ctx, imgURL)
+		if err != nil {
+			util.Logger.Error("Failed to download image", zap.String("url", imgURL), zap.Error(err))
+			return err
 		}

-		resized := imaging.Fill(srcImg, v.width, v.height, imaging.Center, imaging.Lanczos)
-		buf := new(bytes.Buffer)
-		if err := jpeg.Encode(buf, resized, &jpeg.Options{Quality: 100}); err != nil {
-			util.Logger.Warn("Failed to encode jpeg", zap.String("variant", v.name), zap.Error(err))
-			continue
+		srcImg, _, err = image.Decode(bytes.NewReader(imgData))
+		if err != nil {
+			util.Logger.Error("Failed to decode image data", zap.Error(err))
+			return err
 		}
-		currentImgData := buf.Bytes()

-		// 保存 JPG
-		if err := f.saveVariant(ctx, &dbImg, v.name, "jpg", currentImgData); err != nil {
-			util.Logger.Error("Failed to save variant", zap.String("variant", v.name), zap.Error(err))
+		// 保存原图变体
+		if err := f.saveVariant(ctx, imageName, variantName, "jpg", imgData); err != nil {
+			util.Logger.Error("Failed to save original variant", zap.String("variant", variantName), zap.Error(err))
+		}
+
+		for _, v := range targetVariants {
+			if v.name == variantName {
+				continue
+			}
+			resized := imaging.Fill(srcImg, v.width, v.height, imaging.Center, imaging.Lanczos)
+			buf := new(bytes.Buffer)
+			if err := jpeg.Encode(buf, resized, &jpeg.Options{Quality: 100}); err != nil {
+				util.Logger.Warn("Failed to encode jpeg", zap.String("variant", v.name), zap.Error(err))
+				continue
+			}
+			currentImgData := buf.Bytes()
+			if err := f.saveVariant(ctx, imageName, v.name, "jpg", currentImgData); err != nil {
+				util.Logger.Error("Failed to save variant", zap.String("variant", v.name), zap.Error(err))
+			}
 		}
 	}

-	// 保存今日额外文件
+	// 3. 创建 ImageRegion 记录
+	regionRecord := model.ImageRegion{
+		HSH:           bingImg.HSH,
+		URLBase:       bingImg.URLBase,
+		ImageName:     imageName,
+		Date:          dateStr,
+		Mkt:           mkt,
+		Title:         bingImg.Title,
+		Copyright:     bingImg.Copyright,
+		CopyrightLink: bingImg.CopyrightLink,
+		Quiz:          bingImg.Quiz,
+		StartDate:     bingImg.Startdate,
+		FullStartDate: bingImg.Fullstartdate,
+	}
+
+	if err := repo.DB.Clauses(clause.OnConflict{
+		Columns:   []clause.Column{{Name: "date"}, {Name: "mkt"}},
+		UpdateAll: true,
+	}).Create(&regionRecord).Error; err != nil {
+		util.Logger.Error("Failed to create region record", zap.Error(err))
+		return err
+	}
+
+	util.Logger.Info("Successfully saved/updated ImageRegion record to database",
+		zap.String("date", dateStr),
+		zap.String("mkt", mkt),
+		zap.String("title", regionRecord.Title))
+
+	// 4. 保存今日额外文件
 	today := time.Now().Format("2006-01-02")
 	if dateStr == today && config.GetConfig().Feature.WriteDailyFiles {
-		f.saveDailyFiles(srcImg, imgData, mkt)
+		if imgData != nil && srcImg != nil {
+			f.saveDailyFiles(srcImg, imgData, mkt)
+		}
 	}

 	return nil
 }

-func (f *Fetcher) probeUHD(urlBase string) (string, string) {
+func (f *Fetcher) extractImageName(urlBase, hsh string) string {
+	// 示例: /th?id=OHR.MilwaukeeHall_ROW0871854348
+	start := 0
+	if idx := strings.Index(urlBase, "OHR."); idx != -1 {
+		start = idx + 4
+	} else if idx := strings.Index(urlBase, "id="); idx != -1 {
+		start = idx + 3
+	}
+
+	rem := urlBase[start:]
+	end := strings.Index(rem, "_")
+	if end == -1 {
+		end = len(rem)
+	}
+
+	name := rem[:end]
+	if name == "" {
+		return hsh
+	}
+	return name
+}
+
+func (f *Fetcher) probeUHD(ctx context.Context, urlBase string) (string, string) {
 	uhdURL := fmt.Sprintf("https://www.bing.com%s_UHD.jpg", urlBase)
-	resp, err := f.httpClient.Head(uhdURL)
+	req, err := http.NewRequestWithContext(ctx, "HEAD", uhdURL, nil)
+	if err != nil {
+		return fmt.Sprintf("https://www.bing.com%s_1920x1080.jpg", urlBase), "1920x1080"
+	}
+	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36")
+
+	resp, err := f.httpClient.Do(req)
 	if err == nil && resp.StatusCode == http.StatusOK {
 		return uhdURL, "UHD"
 	}
 	return fmt.Sprintf("https://www.bing.com%s_1920x1080.jpg", urlBase), "1920x1080"
 }

-func (f *Fetcher) downloadImage(url string) ([]byte, error) {
-	resp, err := f.httpClient.Get(url)
+func (f *Fetcher) downloadImage(ctx context.Context, url string) ([]byte, error) {
+	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36")
+
+	resp, err := f.httpClient.Do(req)
 	if err != nil {
 		return nil, err
 	}
@@ -235,31 +310,67 @@ func (f *Fetcher) downloadImage(url string) ([]byte, error) {
 	return io.ReadAll(resp.Body)
 }

-func (f *Fetcher) saveVariant(ctx context.Context, img *model.Image, variant, format string, data []byte) error {
-	key := fmt.Sprintf("%s/%s/%s_%s.%s", img.Mkt, img.Date, img.Date, variant, format)
+func (f *Fetcher) generateKey(imageName, variant, format string) string {
+	return fmt.Sprintf("%s/%s_%s.%s", imageName, imageName, variant, format)
+}
+
+func (f *Fetcher) saveVariant(ctx context.Context, imageName, variant, format string, data []byte) error {
+	key := f.generateKey(imageName, variant, format)
 	contentType := "image/jpeg"
 	if format == "webp" {
 		contentType = "image/webp"
 	}

-	stored, err := storage.GlobalStorage.Put(ctx, key, bytes.NewReader(data), contentType)
+	var size int64
+	var publicURL string
+
+	exists, _ := storage.GlobalStorage.Exists(ctx, key)
+	if exists {
+		util.Logger.Debug("Variant already exists in storage, linking", zap.String("key", key))
+		// 如果存在，尝试获取公共 URL
+		if pURL, ok := storage.GlobalStorage.PublicURL(key); ok {
+			publicURL = pURL
+		}
+
+		// 如果传入了数据，则使用数据大小
+		if data != nil {
+			size = int64(len(data))
+		}
+	} else if data != nil {
+		util.Logger.Debug("Saving variant to storage", zap.String("key", key))
+		stored, err := storage.GlobalStorage.Put(ctx, key, bytes.NewReader(data), contentType)
+		if err != nil {
+			return err
+		}
+		publicURL = stored.PublicURL
+		size = stored.Size
+	} else {
+		return fmt.Errorf("variant %s does not exist and no data provided", key)
+	}
+
+	vRecord := model.ImageVariant{
+		ImageName:  imageName,
+		Variant:    variant,
+		Format:     format,
+		StorageKey: key,
+		PublicURL:  publicURL,
+		Size:       size,
+	}
+
+	err := repo.DB.Clauses(clause.OnConflict{
+		Columns:   []clause.Column{{Name: "image_name"}, {Name: "variant"}, {Name: "format"}},
+		DoNothing: true,
+	}).Create(&vRecord).Error
 	if err != nil {
 		return err
 	}

-	vRecord := model.ImageVariant{
-		ImageID:    img.ID,
-		Variant:    variant,
-		Format:     format,
-		StorageKey: stored.Key,
-		PublicURL:  stored.PublicURL,
-		Size:       int64(len(data)),
-	}
+	util.Logger.Info("Successfully saved ImageVariant record to database",
+		zap.String("image_name", imageName),
+		zap.String("variant", variant),
+		zap.String("format", format))

-	return repo.DB.Clauses(clause.OnConflict{
-		Columns:   []clause.Column{{Name: "image_id"}, {Name: "variant"}, {Name: "format"}},
-		DoNothing: true,
-	}).Create(&vRecord).Error
+	return nil
 }

 func (f *Fetcher) saveDailyFiles(srcImg image.Image, originalData []byte, mkt string) {
@@ -293,7 +404,7 @@ func (f *Fetcher) saveDailyFiles(srcImg image.Image, originalData []byte, mkt st

 	// 同时也保留一份在根目录下（兼容旧逻辑，且作为默认地区图片）
 	// 如果是默认地区或者是第一个抓取的地区，可以覆盖根目录的文件
-	if mkt == config.GetConfig().GetDefaultMkt() {
+	if mkt == config.GetConfig().GetDefaultRegion() {
 		jpegPathRoot := filepath.Join(localRoot, "daily.jpeg")
 		fJpegRoot, err := os.Create(jpegPathRoot)
 		if err == nil {
--- a/internal/service/image/image_service.go
+++ b/internal/service/image/image_service.go
@@ -2,18 +2,24 @@ package image

 import (
 	"context"
+	"errors"
 	"fmt"
+	"math/rand"
 	"time"

 	"BingPaper/internal/config"
 	"BingPaper/internal/model"
 	"BingPaper/internal/repo"
+	"BingPaper/internal/service/fetcher"
 	"BingPaper/internal/storage"
 	"BingPaper/internal/util"

 	"go.uber.org/zap"
+	"gorm.io/gorm"
 )

+var ErrFetchStarted = errors.New("on-demand fetch started")
+
 func CleanupOldImages(ctx context.Context) error {
 	days := config.GetConfig().Retention.Days
 	if days <= 0 {
@@ -23,139 +29,195 @@ func CleanupOldImages(ctx context.Context) error {
 	threshold := time.Now().AddDate(0, 0, -days).Format("2006-01-02")
 	util.Logger.Info("Starting cleanup task", zap.Int("retention_days", days), zap.String("threshold", threshold))

-	var images []model.Image
-	if err := repo.DB.Where("date < ?", threshold).Preload("Variants").Find(&images).Error; err != nil {
-		util.Logger.Error("Failed to query old images for cleanup", zap.Error(err))
+	var regionRecords []model.ImageRegion
+	if err := repo.DB.Where("date < ?", threshold).Preload("Variants").Find(&regionRecords).Error; err != nil {
+		util.Logger.Error("Failed to query old image regions for cleanup", zap.Error(err))
 		return err
 	}

-	for _, img := range images {
-		util.Logger.Info("Deleting old image", zap.String("date", img.Date))
-		for _, v := range img.Variants {
-			if err := storage.GlobalStorage.Delete(ctx, v.StorageKey); err != nil {
-				util.Logger.Warn("Failed to delete storage object", zap.String("key", v.StorageKey), zap.Error(err))
+	for _, m := range regionRecords {
+		util.Logger.Info("Deleting old image region record", zap.String("date", m.Date), zap.String("mkt", m.Mkt))
+
+		// 检查该图片名是否还有其他地区或日期在使用
+		var count int64
+		repo.DB.Model(&model.ImageRegion{}).Where("image_name = ? AND id != ?", m.ImageName, m.ID).Count(&count)
+
+		if count == 0 {
+			util.Logger.Info("Image content no longer referenced, deleting files and variants", zap.String("image_name", m.ImageName))
+			for _, v := range m.Variants {
+				if err := storage.GlobalStorage.Delete(ctx, v.StorageKey); err != nil {
+					util.Logger.Warn("Failed to delete storage object", zap.String("key", v.StorageKey), zap.Error(err))
+				}
+			}
+			// 删除变体记录
+			if err := repo.DB.Where("image_name = ?", m.ImageName).Delete(&model.ImageVariant{}).Error; err != nil {
+				util.Logger.Error("Failed to delete variants", zap.String("image_name", m.ImageName), zap.Error(err))
 			}
 		}
-		// 删除关联记录（逻辑外键控制）
-		if err := repo.DB.Where("image_id = ?", img.ID).Delete(&model.ImageVariant{}).Error; err != nil {
-			util.Logger.Error("Failed to delete variants", zap.Uint("image_id", img.ID), zap.Error(err))
-		}
-		// 删除主表记录
-		if err := repo.DB.Delete(&img).Error; err != nil {
-			util.Logger.Error("Failed to delete image", zap.Uint("id", img.ID), zap.Error(err))
+
+		// 删除地区记录
+		if err := repo.DB.Delete(&m).Error; err != nil {
+			util.Logger.Error("Failed to delete image region record", zap.Uint("id", m.ID), zap.Error(err))
 		}
 	}

-	util.Logger.Info("Cleanup task completed", zap.Int("deleted_count", len(images)))
+	util.Logger.Info("Cleanup task completed", zap.Int("deleted_count", len(regionRecords)))
 	return nil
 }

-func GetTodayImage(mkt string) (*model.Image, error) {
+func GetTodayImage(mkt string) (*model.ImageRegion, error) {
 	today := time.Now().Format("2006-01-02")
-	var img model.Image
+	util.Logger.Debug("Getting today image", zap.String("mkt", mkt), zap.String("today", today))
+	var imgRegion model.ImageRegion
 	tx := repo.DB.Where("date = ?", today)
 	if mkt != "" {
 		tx = tx.Where("mkt = ?", mkt)
 	}
-	err := tx.Preload("Variants").First(&img).Error
+	err := tx.Preload("Variants", func(db *gorm.DB) *gorm.DB {
+		return db.Order("size asc")
+	}).First(&imgRegion).Error
+	if err != nil && mkt != "" && config.GetConfig().API.EnableOnDemandFetch && util.IsValidRegion(mkt) {
+		// 如果没找到，尝试异步按需抓取该地区
+		util.Logger.Info("Image not found in DB, starting asynchronous on-demand fetch", zap.String("mkt", mkt))
+		f := fetcher.NewFetcher()
+		go func() {
+			_ = f.FetchRegion(context.Background(), mkt)
+		}()
+		return nil, ErrFetchStarted
+	}
+
 	if err != nil {
-		// 如果今天没有，尝试获取最近的一张
+		util.Logger.Debug("Today image not found, trying latest image", zap.String("mkt", mkt))
+		// 如果今天还是没有，尝试获取最近的一张
 		tx = repo.DB.Order("date desc")
 		if mkt != "" {
 			tx = tx.Where("mkt = ?", mkt)
 		}
-		err = tx.Preload("Variants").First(&img).Error
+		err = tx.Preload("Variants", func(db *gorm.DB) *gorm.DB {
+			return db.Order("size asc")
+		}).First(&imgRegion).Error
 	}

-	// 兜底逻辑：如果指定地区没找到，且开启了兜底开关，则尝试获取默认地区的图片
+	// 兜底逻辑
 	if err != nil && mkt != "" && config.GetConfig().API.EnableMktFallback {
-		defaultMkt := config.GetConfig().GetDefaultMkt()
+		defaultMkt := config.GetConfig().GetDefaultRegion()
+		util.Logger.Debug("Image not found, trying fallback to default region", zap.String("mkt", mkt), zap.String("defaultMkt", defaultMkt))
 		if mkt != defaultMkt {
 			return GetTodayImage(defaultMkt)
 		}
 		return GetTodayImage("")
 	}

-	return &img, err
+	if err == nil {
+		util.Logger.Debug("Found image region record", zap.String("date", imgRegion.Date), zap.String("mkt", imgRegion.Mkt))
+	}
+	return &imgRegion, err
 }

-func GetRandomImage(mkt string) (*model.Image, error) {
-	var img model.Image
-	// SQLite 使用 RANDOM(), MySQL/Postgres 使用 RANDOM() 或 RAND()
-	// 简单起见，先查总数再 Offset
+func GetAllRegionsTodayImages() ([]model.ImageRegion, error) {
+	today := time.Now().Format("2006-01-02")
+	regions := config.GetConfig().Fetcher.Regions
+	if len(regions) == 0 {
+		regions = []string{config.GetConfig().GetDefaultRegion()}
+	}
+
+	var images []model.ImageRegion
+	err := repo.DB.Where("date = ? AND mkt IN ?", today, regions).
+		Preload("Variants", func(db *gorm.DB) *gorm.DB {
+			return db.Order("size asc")
+		}).Find(&images).Error
+
+	return images, err
+}
+
+func GetRandomImage(mkt string) (*model.ImageRegion, error) {
+	util.Logger.Debug("Getting random image", zap.String("mkt", mkt))
+	var imgRegion model.ImageRegion
 	var count int64
-	tx := repo.DB.Model(&model.Image{})
+	tx := repo.DB.Model(&model.ImageRegion{})
 	if mkt != "" {
 		tx = tx.Where("mkt = ?", mkt)
 	}
 	tx.Count(&count)
+	if count == 0 && mkt != "" && config.GetConfig().API.EnableOnDemandFetch && util.IsValidRegion(mkt) {
+		util.Logger.Info("No images found in DB for region, starting asynchronous on-demand fetch", zap.String("mkt", mkt))
+		f := fetcher.NewFetcher()
+		go func() {
+			_ = f.FetchRegion(context.Background(), mkt)
+		}()
+		return nil, ErrFetchStarted
+	}
+
 	if count == 0 {
 		return nil, fmt.Errorf("no images found")
 	}

-	// 这种方法不适合海量数据，但对于 30 天的数据没问题
-	tx = repo.DB.Order("RANDOM()")
-	if mkt != "" {
-		tx = tx.Where("mkt = ?", mkt)
-	}
-	err := tx.Preload("Variants").First(&img).Error
-	if err != nil {
-		// 适配 MySQL
-		tx = repo.DB.Order("RAND()")
-		if mkt != "" {
-			tx = tx.Where("mkt = ?", mkt)
-		}
-		err = tx.Preload("Variants").First(&img).Error
-	}
+	offset := rand.Intn(int(count))
+	util.Logger.Debug("Random image selection", zap.Int64("total", count), zap.Int("offset", offset))
+	err := tx.Preload("Variants", func(db *gorm.DB) *gorm.DB {
+		return db.Order("size asc")
+	}).Offset(offset).Limit(1).Find(&imgRegion).Error

-	// 兜底逻辑
-	if err != nil && mkt != "" && config.GetConfig().API.EnableMktFallback {
-		defaultMkt := config.GetConfig().GetDefaultMkt()
+	if (err != nil || imgRegion.ID == 0) && mkt != "" && config.GetConfig().API.EnableMktFallback {
+		defaultMkt := config.GetConfig().GetDefaultRegion()
+		util.Logger.Debug("Random image not found, trying fallback", zap.String("mkt", mkt), zap.String("defaultMkt", defaultMkt))
 		if mkt != defaultMkt {
 			return GetRandomImage(defaultMkt)
 		}
 		return GetRandomImage("")
 	}

-	return &img, err
+	if err == nil && imgRegion.ID == 0 {
+		return nil, fmt.Errorf("no images found")
+	}
+
+	return &imgRegion, err
 }

-func GetImageByDate(date string, mkt string) (*model.Image, error) {
-	var img model.Image
+func GetImageByDate(date string, mkt string) (*model.ImageRegion, error) {
+	util.Logger.Debug("Getting image by date", zap.String("date", date), zap.String("mkt", mkt))
+	var imgRegion model.ImageRegion
 	tx := repo.DB.Where("date = ?", date)
 	if mkt != "" {
 		tx = tx.Where("mkt = ?", mkt)
 	}
-	err := tx.Preload("Variants").First(&img).Error
+	err := tx.Preload("Variants", func(db *gorm.DB) *gorm.DB {
+		return db.Order("size asc")
+	}).First(&imgRegion).Error
+	if err != nil && mkt != "" && config.GetConfig().API.EnableOnDemandFetch && util.IsValidRegion(mkt) {
+		util.Logger.Info("Image not found in DB for date, starting asynchronous on-demand fetch", zap.String("mkt", mkt), zap.String("date", date))
+		f := fetcher.NewFetcher()
+		go func() {
+			_ = f.FetchRegion(context.Background(), mkt)
+		}()
+		return nil, ErrFetchStarted
+	}

-	// 兜底逻辑
 	if err != nil && mkt != "" && config.GetConfig().API.EnableMktFallback {
-		defaultMkt := config.GetConfig().GetDefaultMkt()
+		defaultMkt := config.GetConfig().GetDefaultRegion()
 		if mkt != defaultMkt {
 			return GetImageByDate(date, defaultMkt)
 		}
 		return GetImageByDate(date, "")
 	}

-	return &img, err
+	return &imgRegion, err
 }

-func GetImageList(limit int, offset int, month string, mkt string) ([]model.Image, error) {
-	var images []model.Image
-	tx := repo.DB.Model(&model.Image{})
+func GetImageList(limit int, offset int, month string, mkt string) ([]model.ImageRegion, error) {
+	var images []model.ImageRegion
+	tx := repo.DB.Model(&model.ImageRegion{})

 	if month != "" {
-		// 增强过滤：确保只处理 YYYY-MM 格式，防止注入或非法字符
-		// 这里简单处理：只要不为空就增加 LIKE 过滤
-		util.Logger.Debug("Filtering images by month", zap.String("month", month))
 		tx = tx.Where("date LIKE ?", month+"%")
 	}
-
 	if mkt != "" {
 		tx = tx.Where("mkt = ?", mkt)
 	}

-	tx = tx.Order("date desc").Preload("Variants")
+	tx = tx.Order("date desc").Preload("Variants", func(db *gorm.DB) *gorm.DB {
+		return db.Order("size asc")
+	})

 	if limit > 0 {
 		tx = tx.Limit(limit)
@@ -165,8 +227,5 @@ func GetImageList(limit int, offset int, month string, mkt string) ([]model.Imag
 	}

 	err := tx.Find(&images).Error
-	if err != nil {
-		util.Logger.Error("Failed to get image list", zap.Error(err), zap.String("month", month))
-	}
 	return images, err
 }
--- a/internal/storage/local/local.go
+++ b/internal/storage/local/local.go
@@ -63,3 +63,15 @@ func (l *LocalStorage) Delete(ctx context.Context, key string) error {
 func (l *LocalStorage) PublicURL(key string) (string, bool) {
 	return "", false
 }
+
+func (l *LocalStorage) Exists(ctx context.Context, key string) (bool, error) {
+	path := filepath.Join(l.root, key)
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}
--- a/internal/storage/s3/s3.go
+++ b/internal/storage/s3/s3.go
@@ -100,3 +100,18 @@ func (s *S3Storage) PublicURL(key string) (string, bool) {
 	// 也可以生成签名 URL，但这里简单处理
 	return "", false
 }
+
+func (s *S3Storage) Exists(ctx context.Context, key string) (bool, error) {
+	_, err := s.client.HeadObject(ctx, &s3.HeadObjectInput{
+		Bucket: aws.String(s.bucket),
+		Key:    aws.String(key),
+	})
+	if err != nil {
+		// 判断是否为 404
+		if strings.Contains(err.Error(), "NotFound") || strings.Contains(err.Error(), "404") {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
+}
--- a/internal/storage/storage.go
+++ b/internal/storage/storage.go
@@ -17,6 +17,7 @@ type Storage interface {
 	Get(ctx context.Context, key string) (io.ReadCloser, string, error)
 	Delete(ctx context.Context, key string) error
 	PublicURL(key string) (string, bool)
+	Exists(ctx context.Context, key string) (bool, error)
 }

 var GlobalStorage Storage
--- a/internal/storage/webdav/webdav.go
+++ b/internal/storage/webdav/webdav.go
@@ -72,3 +72,16 @@ func (w *WebDAVStorage) PublicURL(key string) (string, bool) {
 	}
 	return "", false
 }
+
+func (w *WebDAVStorage) Exists(ctx context.Context, key string) (bool, error) {
+	_, err := w.client.Stat(key)
+	if err == nil {
+		return true, nil
+	}
+	// gowebdav 的错误处理比较原始，通常 404 会返回错误
+	// 这里假设报错就是不存在，或者可以根据错误消息判断
+	if strings.Contains(err.Error(), "404") || strings.Contains(err.Error(), "not found") {
+		return false, nil
+	}
+	return false, err
+}
--- a/internal/util/regions.go
+++ b/internal/util/regions.go
@@ -1,26 +1,35 @@
 package util

+import "golang.org/x/text/language"
+
 type Region struct {
 	Value string `json:"value"`
 	Label string `json:"label"`
 }

-var AllRegions = []Region{
-	{Value: "zh-CN", Label: "中国 (zh-CN)"},
-	{Value: "en-US", Label: "美国 (en-US)"},
-	{Value: "ja-JP", Label: "日本 (ja-JP)"},
-	{Value: "en-AU", Label: "澳大利亚 (en-AU)"},
-	{Value: "en-GB", Label: "英国 (en-GB)"},
-	{Value: "de-DE", Label: "德国 (de-DE)"},
-	{Value: "en-NZ", Label: "新西兰 (en-NZ)"},
-	{Value: "en-CA", Label: "加拿大 (en-CA)"},
-	{Value: "fr-FR", Label: "法国 (fr-FR)"},
-	{Value: "it-IT", Label: "意大利 (it-IT)"},
-	{Value: "es-ES", Label: "西班牙 (es-ES)"},
-	{Value: "pt-BR", Label: "巴西 (pt-BR)"},
-	{Value: "ko-KR", Label: "韩国 (ko-KR)"},
-	{Value: "en-IN", Label: "印度 (en-IN)"},
-	{Value: "ru-RU", Label: "俄罗斯 (ru-RU)"},
-	{Value: "zh-HK", Label: "中国香港 (zh-HK)"},
-	{Value: "zh-TW", Label: "中国台湾 (zh-TW)"},
+// IsValidRegion 校验是否为标准的地区编码 (BCP 47)
+func IsValidRegion(mkt string) bool {
+	if mkt == "" {
+		return false
+	}
+	_, err := language.Parse(mkt)
+	return err == nil
+}
+
+var AllRegions = []Region{
+	{Value: "zh-CN", Label: "中国"},
+	{Value: "en-US", Label: "美国"},
+	{Value: "ja-JP", Label: "日本"},
+	{Value: "en-AU", Label: "澳大利亚"},
+	{Value: "en-GB", Label: "英国"},
+	{Value: "de-DE", Label: "德国"},
+	{Value: "en-NZ", Label: "新西兰"},
+	{Value: "en-CA", Label: "加拿大"},
+	{Value: "fr-FR", Label: "法国"},
+	{Value: "it-IT", Label: "意大利"},
+	{Value: "es-ES", Label: "西班牙"},
+	{Value: "pt-BR", Label: "巴西"},
+	{Value: "ko-KR", Label: "韩国"},
+	{Value: "en-IN", Label: "印度"},
+	{Value: "ru-RU", Label: "俄罗斯"},
 }
--- a/webapp/src/composables/useImages.ts
+++ b/webapp/src/composables/useImages.ts
@@ -37,6 +37,39 @@ export function useTodayImage(mkt?: string) {
  }
 }

+/**
+ * 获取全球今日图片
+ */
+export function useGlobalTodayImages() {
+  const images = ref<ImageMeta[]>([])
+  const loading = ref(false)
+  const error = ref<Error | null>(null)
+
+  const fetchImages = async () => {
+    loading.value = true
+    error.value = null
+    try {
+      images.value = await bingPaperApi.getGlobalTodayImages()
+    } catch (e) {
+      error.value = e as Error
+      console.error('Failed to fetch global today images:', e)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  onMounted(() => {
+    fetchImages()
+  })
+
+  return {
+    images,
+    loading,
+    error,
+    refetch: fetchImages
+  }
+}
+
 /**
 * 获取图片列表（支持分页和月份筛选）
 */
--- a/webapp/src/lib/api-service.ts
+++ b/webapp/src/lib/api-service.ts
@@ -118,6 +118,13 @@ export class BingPaperApiService {
    return apiClient.get<ImageMeta[]>(endpoint)
  }

+  /**
+   * 获取所有地区的今日图片列表
+   */
+  async getGlobalTodayImages(): Promise<ImageMeta[]> {
+    return apiClient.get<ImageMeta[]>('/images/global/today')
+  }
+
  /**
   * 获取支持的地区列表
   */
@@ -212,6 +219,7 @@ export const {
  manualFetch,
  manualCleanup,
  getImages,
+  getGlobalTodayImages,
  getRegions,
  getTodayImageMeta,
  getImageMetaByDate,
--- a/webapp/src/lib/api-types.ts
+++ b/webapp/src/lib/api-types.ts
@@ -75,6 +75,7 @@ export interface AdminConfig {
 export interface APIConfig {
  Mode: string // 'local' | 'redirect'
  EnableMktFallback: boolean
+  EnableOnDemandFetch: boolean
 }

 export interface CronConfig {
--- a/webapp/src/lib/mkt-utils.ts
+++ b/webapp/src/lib/mkt-utils.ts
@@ -6,23 +6,23 @@ const DEFAULT_MKT = 'zh-CN'
 * 默认地区列表 (兜底用)
 */
 export const DEFAULT_REGIONS = [
-  { value: 'zh-CN', label: '中国 (zh-CN)' },
-  { value: 'en-US', label: '美国 (en-US)' },
-  { value: 'ja-JP', label: '日本 (ja-JP)' },
-  { value: 'en-AU', label: '澳大利亚 (en-AU)' },
-  { value: 'en-GB', label: '英国 (en-GB)' },
-  { value: 'de-DE', label: '德国 (de-DE)' },
-  { value: 'en-NZ', label: '新西兰 (en-NZ)' },
-  { value: 'en-CA', label: '加拿大 (en-CA)' },
-  { value: 'fr-FR', label: '法国 (fr-FR)' },
-  { value: 'it-IT', label: '意大利 (it-IT)' },
-  { value: 'es-ES', label: '西班牙 (es-ES)' },
-  { value: 'pt-BR', label: '巴西 (pt-BR)' },
-  { value: 'ko-KR', label: '韩国 (ko-KR)' },
-  { value: 'en-IN', label: '印度 (en-IN)' },
-  { value: 'ru-RU', label: '俄罗斯 (ru-RU)' },
-  { value: 'zh-HK', label: '中国香港 (zh-HK)' },
-  { value: 'zh-TW', label: '中国台湾 (zh-TW)' },
+  { value: 'zh-CN', label: '中国' },
+  { value: 'en-US', label: '美国' },
+  { value: 'ja-JP', label: '日本' },
+  { value: 'en-AU', label: '澳大利亚' },
+  { value: 'en-GB', label: '英国' },
+  { value: 'de-DE', label: '德国' },
+  { value: 'en-NZ', label: '新西兰' },
+  { value: 'en-CA', label: '加拿大' },
+  { value: 'fr-FR', label: '法国' },
+  { value: 'it-IT', label: '意大利' },
+  { value: 'es-ES', label: '西班牙' },
+  { value: 'pt-BR', label: '巴西' },
+  { value: 'ko-KR', label: '韩国' },
+  { value: 'en-IN', label: '印度' },
+  { value: 'ru-RU', label: '俄罗斯' },
+  { value: 'zh-HK', label: '中国香港' },
+  { value: 'zh-TW', label: '中国台湾' },
 ]

 /**
--- a/webapp/src/views/AdminConfig.vue
+++ b/webapp/src/views/AdminConfig.vue
@@ -102,16 +102,33 @@
                local: 直接返回图片流; redirect: 重定向到存储位置
              </p>
            </div>
-            <div class="flex items-center gap-2">
-              <Label for="api-fallback">启用地区不存在时兜底</Label>
-              <Switch
-                id="api-fallback"
-                v-model="config.API.EnableMktFallback"
-              />
+            <div class="space-y-4">
+              <div class="flex items-center justify-between">
+                <div class="space-y-0.5">
+                  <Label for="api-fallback">启用地区不存在时兜底</Label>
+                  <p class="text-xs text-gray-500">
+                    如果请求的地区无数据，自动回退到默认地区
+                  </p>
+                </div>
+                <Switch
+                  id="api-fallback"
+                  v-model="config.API.EnableMktFallback"
+                />
+              </div>
+
+              <div class="flex items-center justify-between">
+                <div class="space-y-0.5">
+                  <Label for="api-on-demand">启用按需实时抓取</Label>
+                  <p class="text-xs text-gray-500">
+                    如果请求的地区无数据，尝试实时从 Bing 抓取
+                  </p>
+                </div>
+                <Switch
+                  id="api-on-demand"
+                  v-model="config.API.EnableOnDemandFetch"
+                />
+              </div>
            </div>
-            <p class="text-xs text-gray-500">
-              如果请求的地区无数据，自动回退到默认地区
-            </p>
          </CardContent>
        </Card>

@@ -465,7 +482,7 @@ const allRegions = ref<any[]>([])

 const config = ref<Config>({
  Admin: { PasswordBcrypt: '' },
-  API: { Mode: 'local', EnableMktFallback: true },
+  API: { Mode: 'local', EnableMktFallback: true, EnableOnDemandFetch: false },
  Cron: { Enabled: true, DailySpec: '0 9 * * *' },
  DB: { Type: 'sqlite', DSN: '' },
  Feature: { WriteDailyFiles: true },
--- a/webapp/src/views/Home.vue
+++ b/webapp/src/views/Home.vue
@@ -69,6 +69,89 @@
      </div>
    </section>

+    <!-- Global Section - 必应全球 -->
+    <section v-if="globalImages.length > 0" class="py-16 px-4 md:px-8 lg:px-16 bg-white/5 border-y border-white/5">
+      <div class="max-w-7xl mx-auto">
+        <div class="flex items-center justify-between mb-8">
+          <div class="space-y-1">
+            <h2 class="text-3xl md:text-4xl font-bold text-white">
+              必应全球
+            </h2>
+          </div>
+        </div>
+
+        <div class="relative group">
+          <!-- 左右切换按钮 -->
+          <button 
+            v-show="canScrollLeft"
+            @click="scrollGlobal('left')"
+            class="absolute left-[-20px] top-1/2 -translate-y-1/2 z-30 p-2 bg-black/60 backdrop-blur-md rounded-full text-white transition-all hidden md:block border border-white/10 hover:bg-black/80 hover:scale-110 active:scale-95 shadow-2xl"
+          >
+            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path>
+            </svg>
+          </button>
+          <button 
+            v-show="canScrollRight"
+            @click="scrollGlobal('right')"
+            class="absolute right-[-20px] top-1/2 -translate-y-1/2 z-30 p-2 bg-black/60 backdrop-blur-md rounded-full text-white transition-all hidden md:block border border-white/10 hover:bg-black/80 hover:scale-110 active:scale-95 shadow-2xl"
+          >
+            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path>
+            </svg>
+          </button>
+
+          <div 
+            ref="globalScrollContainer"
+            class="flex overflow-x-auto gap-6 pb-6 -mx-4 px-4 md:mx-0 md:px-0 scrollbar-hide snap-x scroll-smooth"
+          >
+            <div 
+              v-for="image in globalImages" 
+              :key="image.mkt! + image.date!"
+              class="flex-none w-[280px] md:w-[350px] aspect-video rounded-xl overflow-hidden cursor-pointer transform transition-all duration-500 hover:scale-[1.02] hover:shadow-2xl snap-start relative group/card"
+              @click="viewImage(image.date!, image.mkt!)"
+            >
+              <!-- 图片层 -->
+              <img 
+                :src="getImageUrl(image)" 
+                :alt="image.title"
+                class="w-full h-full object-cover transition-transform duration-700 group-hover/card:scale-110"
+              />
+              
+              <!-- 渐变层 -->
+              <div class="absolute inset-0 bg-gradient-to-t from-black/90 via-black/20 to-transparent group-hover/card:via-black/40 transition-colors duration-500"></div>
+              
+              <!-- 内容层 -->
+              <div class="absolute inset-0 flex flex-col justify-end p-5">
+                <div class="text-[10px] md:text-xs text-white/60 mb-1 transform translate-y-2 group-hover/card:translate-y-0 transition-transform duration-500">
+                  {{ formatDate(image.date) }}
+                </div>
+                <div class="flex items-center gap-2 mb-2 transform translate-y-2 group-hover/card:translate-y-0 transition-transform duration-500">
+                  <span class="text-xs text-white/70 font-medium">
+                    {{ getRegionLabel(image.mkt) }}
+                  </span>
+                </div>
+                
+                <h3 class="text-white font-bold text-base md:text-lg line-clamp-1 transform translate-y-1 group-hover/card:translate-y-0 transition-transform duration-500">
+                  {{ image.title || '必应每日一图' }}
+                </h3>
+              </div>
+            </div>
+          </div>
+          
+          <!-- 左右渐变遮罩 (仅在大屏显示) -->
+          <div 
+            class="absolute left-0 top-0 bottom-6 w-24 bg-gradient-to-r from-gray-900 to-transparent pointer-events-none hidden md:block transition-opacity duration-500"
+            :class="canScrollLeft ? 'opacity-100' : 'opacity-0'"
+          ></div>
+          <div 
+            class="absolute right-0 top-0 bottom-6 w-24 bg-gradient-to-l from-gray-900 to-transparent pointer-events-none hidden md:block transition-opacity duration-500"
+            :class="canScrollRight ? 'opacity-100' : 'opacity-0'"
+          ></div>
+        </div>
+      </div>
+    </section>
+
    <!-- Gallery Section - 历史图片 -->
    <section class="py-16 px-4 md:px-8 lg:px-16">
      <div class="max-w-7xl mx-auto">
@@ -262,7 +345,7 @@

 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
-import { useImageList } from '@/composables/useImages'
+import { useImageList, useGlobalTodayImages } from '@/composables/useImages'
 import { bingPaperApi } from '@/lib/api-service'
 import { normalizeImageUrl } from '@/lib/api-config'
 import { useRouter } from 'vue-router'
@@ -284,9 +367,40 @@ const regions = ref(SUPPORTED_REGIONS)
 const latestImage = ref<any>(null)
 const todayLoading = ref(false)

+// 全球今日图片
+const { images: globalImages } = useGlobalTodayImages()
+
+// 滚动功能实现
+const globalScrollContainer = ref<HTMLElement | null>(null)
+const canScrollLeft = ref(false)
+const canScrollRight = ref(false)
+
+const updateScrollState = () => {
+  if (!globalScrollContainer.value) return
+  const { scrollLeft, scrollWidth, clientWidth } = globalScrollContainer.value
+  canScrollLeft.value = scrollLeft > 5
+  canScrollRight.value = scrollLeft + clientWidth < scrollWidth - 5
+}
+
+const scrollGlobal = (direction: 'left' | 'right') => {
+  if (!globalScrollContainer.value) return
+  const scrollAmount = globalScrollContainer.value.clientWidth * 0.8 || 1000
+  globalScrollContainer.value.scrollBy({
+    left: direction === 'left' ? -scrollAmount : scrollAmount,
+    behavior: 'smooth'
+  })
+}
+
 // 历史图片列表（使用服务端分页和筛选，每页15张）
 const { images, loading, hasMore, loadMore, filterByMonth, filterByMkt } = useImageList(15)

+// 获取地区标签
+const getRegionLabel = (mkt?: string) => {
+  if (!mkt) return ''
+  const region = regions.value.find(r => r.value === mkt)
+  return region ? region.label : mkt
+}
+
 // 加载顶部最新图片
 const loadLatestImage = async () => {
  todayLoading.value = true
@@ -303,20 +417,24 @@ const loadLatestImage = async () => {
  }
 }

-// 初始化加载
-onMounted(async () => {
-  try {
-    const backendRegions = await bingPaperApi.getRegions()
-    if (backendRegions && backendRegions.length > 0) {
-      regions.value = backendRegions
-      setSupportedRegions(backendRegions)
-    }
-  } catch (error) {
-    console.error('Failed to fetch regions:', error)
+
+// 监听滚动容器的变化
+watch(globalScrollContainer, (el, _, onCleanup) => {
+  if (el) {
+    el.addEventListener('scroll', updateScrollState)
+    // 初始检查
+    setTimeout(updateScrollState, 100)
+    onCleanup(() => {
+      el.removeEventListener('scroll', updateScrollState)
+    })
  }
-  loadLatestImage()
 })

+// 监听全球图片数据变化
+watch(globalImages, () => {
+  setTimeout(updateScrollState, 500)
+}, { deep: true })
+
 // 判断最新图片是否为今天的图片
 const isToday = computed(() => {
  if (!latestImage.value?.date) return false
@@ -532,16 +650,34 @@ const setupLoadMoreObserver = () => {
 }

 // 初始化
-onMounted(() => {
+onMounted(async () => {
+  // 1. 获取地区信息
+  try {
+    const backendRegions = await bingPaperApi.getRegions()
+    if (backendRegions && backendRegions.length > 0) {
+      regions.value = backendRegions
+      setSupportedRegions(backendRegions)
+    }
+  } catch (error) {
+    console.error('Failed to fetch regions:', error)
+  }
+
+  // 2. 加载最新图片
  loadLatestImage()
  
+  // 3. 设置观察者和滚动状态
  if (images.value.length > 0) {
    imageVisibility.value = new Array(images.value.length).fill(false)
-    setTimeout(() => {
-      setupObserver()
-      setupLoadMoreObserver()
-    }, 100)
  }
+  
+  setTimeout(() => {
+    setupObserver()
+    setupLoadMoreObserver()
+    updateScrollState()
+  }, 100)
+
+  // 4. 全局事件
+  window.addEventListener('resize', updateScrollState)
 })

 // 清理
@@ -552,6 +688,7 @@ onUnmounted(() => {
  if (loadMoreObserver) {
    loadMoreObserver.disconnect()
  }
+  window.removeEventListener('resize', updateScrollState)
 })

 // 格式化日期
@@ -580,8 +717,9 @@ const getImageUrl = (image: any) => {
 }

 // 查看图片详情
-const viewImage = (date: string) => {
-  router.push(`/image/${date}`)
+const viewImage = (date: string, mkt?: string) => {
+  const query = mkt ? `?mkt=${mkt}` : ''
+  router.push(`/image/${date}${query}`)
 }

 // 打开版权详情链接
@@ -621,4 +759,13 @@ html {
 html::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
 }
+
+/* 隐藏横向滚动条 */
+.scrollbar-hide {
+  -ms-overflow-style: none;  /* IE and Edge */
+  scrollbar-width: none;  /* Firefox */
+}
+.scrollbar-hide::-webkit-scrollbar {
+  display: none; /* Chrome, Safari and Opera */
+}
 </style>
Author	SHA1	Message	Date
hxuanyu	fb7545f9a2	优化 Bing API 请求逻辑，增加语言和地区识别支持，统一传递上下文并增强 HTTP 请求头配置	2026-01-31 00:22:24 +08:00
hxuanyu	ee814f0380	提升日志级别并增加详细日志信息，优化 Bing API 调用与数据库操作可见性	2026-01-31 00:09:55 +08:00
hxuanyu	d3ca6fa919	优化每日图片查询逻辑，使用数据库查询替代循环调用获取多地区图片	2026-01-30 23:40:07 +08:00
hxuanyu	49c78506b2	数据库表重新设计，精简数据结构以及存储结构	2026-01-30 23:02:59 +08:00
hanxuanyu	e40677f105	Merge pull request #2 from hanxuanyu/feature/multi-region-fetch 支持多地区数据切换，优化数据存储结构，基于图片名分类存储，避免重复下载	2026-01-30 16:44:26 +08:00
hanxuanyu	e48959d5ba	优化存储逻辑：为 WebDAV、Local 和 S3 增加 `Exists` 方法；调整图片处理逻辑以避免重复存储变体；新增调试日志以便于排查问题	2026-01-30 16:34:20 +08:00
hanxuanyu	852a72c597	前端构建错误修复	2026-01-30 15:56:22 +08:00
hanxuanyu	2660970320	为 Swagger 文档添加按需抓取支持：新增 `enableOnDemandFetch` 配置项和相关接口的 202/404 状态描述	2026-01-30 15:50:20 +08:00
hanxuanyu	fb636b9450	优化按需抓取逻辑：改为异步处理以提升性能，并为相关接口新增 202 状态支持	2026-01-30 15:49:51 +08:00
hanxuanyu	8ef66b2cb1	国家地区接口优化	2026-01-30 15:45:55 +08:00