diff --git a/internal/config/config.go b/internal/config/config.go
index 0965ec85..cef4ddb3 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/fs"
+	"net/url"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -946,10 +947,12 @@ func (c *Config) ApplyDefaultAIChannel() {
 	if c == nil {
 		return
 	}
+	c.NormalizeAIProviderProfiles()
 	c.AI.EnsureDefaultFromOpenAI(c.OpenAI)
 	if oa, _, ok := c.AI.ResolveChannel(c.AI.DefaultChannel); ok {
 		c.OpenAI = oa
 	}
+	c.NormalizeAIProviderProfiles()
 }
 
 func (c OpenAIConfig) MaxCompletionTokensEffective() int {
@@ -968,6 +971,50 @@ func (c OpenAIConfig) IsDeepSeekEndpointOrModel() bool {
 	return strings.Contains(baseURL, "deepseek")
 }
 
+func (c OpenAIConfig) IsDeepSeekOfficialEndpoint() bool {
+	host := normalizedURLHost(c.BaseURL)
+	return host == "api.deepseek.com"
+}
+
+func normalizedURLHost(raw string) string {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return ""
+	}
+	parsed, err := url.Parse(raw)
+	if err != nil || parsed.Host == "" {
+		parsed, err = url.Parse("https://" + strings.TrimLeft(raw, "/"))
+		if err != nil {
+			return ""
+		}
+	}
+	return strings.ToLower(strings.TrimPrefix(parsed.Hostname(), "www."))
+}
+
+func NormalizeOpenAIProviderProfile(oa *OpenAIConfig) {
+	if oa == nil {
+		return
+	}
+	if oa.IsDeepSeekOfficialEndpoint() {
+		oa.Reasoning.Profile = "deepseek"
+	}
+}
+
+func (c *Config) NormalizeAIProviderProfiles() {
+	if c == nil {
+		return
+	}
+	NormalizeOpenAIProviderProfile(&c.OpenAI)
+	if c.AI.Channels != nil {
+		for id, ch := range c.AI.Channels {
+			oa := ch.ToOpenAIConfig()
+			NormalizeOpenAIProviderProfile(&oa)
+			ch.Reasoning = oa.Reasoning
+			c.AI.Channels[id] = ch
+		}
+	}
+}
+
 // OpenAIReasoningConfig 全局默认与网关 profile（对话页可通过 ChatRequest.reasoning 覆盖，受 AllowClientReasoning 约束）。
 type OpenAIReasoningConfig struct {
 	// Mode: auto（默认）| on | off | default（与 auto 相同）。
@@ -1399,6 +1446,7 @@ func Load(path string) (*Config, error) {
 	if cfg.Audit.MaxDetailBytes <= 0 {
 		cfg.Audit.MaxDetailBytes = 8192
 	}
+	cfg.NormalizeAIProviderProfiles()
 	cfg.ApplyDefaultAIChannel()
 	if err := validateOpenAIOutputLimits(cfg.OpenAI); err != nil {
 		return nil, err
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
index f4f8a9dd..f2d51e56 100644
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -160,6 +160,84 @@ func TestLoadUsesAIDefaultChannelAsRuntimeOpenAI(t *testing.T) {
 	}
 }
 
+func TestNormalizeAIProviderProfilesForOfficialDeepSeekEndpoint(t *testing.T) {
+	cfg := &Config{
+		OpenAI: OpenAIConfig{
+			BaseURL: "https://api.deepseek.com/v1",
+			Model:   "deepseek-chat",
+			Reasoning: OpenAIReasoningConfig{
+				Profile: "openai_compat",
+			},
+		},
+		AI: AIConfig{
+			Channels: map[string]AIChannelConfig{
+				"official": {
+					BaseURL: "api.deepseek.com/v1",
+					Model:   "deepseek-chat",
+					Reasoning: OpenAIReasoningConfig{
+						Profile: "auto",
+					},
+				},
+				"gateway": {
+					BaseURL: "https://compatible.example.com/v1",
+					Model:   "deepseek-chat",
+					Reasoning: OpenAIReasoningConfig{
+						Profile: "openai_compat",
+					},
+				},
+			},
+		},
+	}
+
+	cfg.NormalizeAIProviderProfiles()
+
+	if cfg.OpenAI.Reasoning.Profile != "deepseek" {
+		t.Fatalf("openai profile = %q, want deepseek", cfg.OpenAI.Reasoning.Profile)
+	}
+	if got := cfg.AI.Channels["official"].Reasoning.Profile; got != "deepseek" {
+		t.Fatalf("official channel profile = %q, want deepseek", got)
+	}
+	if got := cfg.AI.Channels["gateway"].Reasoning.Profile; got != "openai_compat" {
+		t.Fatalf("gateway profile should be preserved, got %q", got)
+	}
+}
+
+func TestLoadNormalizesDefaultChannelForOfficialDeepSeekEndpoint(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "config.yaml")
+	initial := strings.Join([]string{
+		"ai:",
+		"  default_channel: deepseek",
+		"  channels:",
+		"    deepseek:",
+		"      name: DeepSeek",
+		"      provider: openai_compatible",
+		"      base_url: https://api.deepseek.com/v1",
+		"      api_key: deepseek-key",
+		"      model: deepseek-chat",
+		"      reasoning:",
+		"        profile: openai_compat",
+		"server:",
+		"  host: 127.0.0.1",
+		"  port: 8080",
+		"",
+	}, "\n")
+	if err := os.WriteFile(path, []byte(initial), 0644); err != nil {
+		t.Fatalf("write config: %v", err)
+	}
+
+	cfg, err := Load(path)
+	if err != nil {
+		t.Fatalf("Load: %v", err)
+	}
+	if cfg.OpenAI.Reasoning.Profile != "deepseek" {
+		t.Fatalf("runtime OpenAI profile = %q, want deepseek", cfg.OpenAI.Reasoning.Profile)
+	}
+	if got := cfg.AI.Channels["deepseek"].Reasoning.Profile; got != "deepseek" {
+		t.Fatalf("channel profile = %q, want deepseek", got)
+	}
+}
+
 func TestSummarizationUserIntentLedgerRunesEffective(t *testing.T) {
 	var zero MultiAgentEinoMiddlewareConfig
 	if got := zero.SummarizationUserIntentLedgerMaxRunesEffective(); got != DefaultSummarizationUserIntentLedgerMaxRunes {
diff --git a/internal/handler/config.go b/internal/handler/config.go
index 98b4e570..3d98c5ed 100644
--- a/internal/handler/config.go
+++ b/internal/handler/config.go
@@ -1169,6 +1169,8 @@ func (h *ConfigHandler) UpdateConfig(c *gin.Context) {
 		}
 	}
 
+	h.config.NormalizeAIProviderProfiles()
+
 	// 保存配置到文件
 	if err := h.saveConfig(); err != nil {
 		h.logger.Error("保存配置失败", zap.Error(err))
@@ -1744,6 +1746,8 @@ func (h *ConfigHandler) ApplyConfig(c *gin.Context) {
 
 // saveConfig 保存配置到文件
 func (h *ConfigHandler) saveConfig() error {
+	h.config.NormalizeAIProviderProfiles()
+
 	// 读取现有配置文件并创建备份
 	data, err := os.ReadFile(h.configPath)
 	if err != nil {